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Turnbull J, Jha RR, Gowler PRW, Ferrands-Bentley R, Kim DH, Barrett DA, Sarmanova A, Fernandes GS, Doherty M, Zhang W, Walsh DA, Valdes AM, Chapman V. Serum levels of hydroxylated metabolites of arachidonic acid cross-sectionally and longitudinally predict knee pain progression: an observational cohort study. Osteoarthritis Cartilage 2024:S1063-4584(24)01157-9. [PMID: 38648876 DOI: 10.1016/j.joca.2024.04.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Revised: 04/11/2024] [Accepted: 04/11/2024] [Indexed: 04/25/2024]
Abstract
OBJECTIVE To examine associations between serum oxylipins, which regulate tissue repair and pain signalling, and knee pain/radiographic osteoarthritis (OA) at baseline and knee pain at 3 year follow-up. METHOD Baseline, and 3 year follow-up, knee pain phenotypes were assessed from 154 participants in the Knee Pain in the Community Cohort (KPIC) study. Serum and radiographic Kellgren and Lawrence (KL) and Nottingham line drawing atlas (NLDA) OA scores were collected at baseline. Oxylipin levels were quantified using liquid chromatography coupled with mass spectrometry (LC-MS/MS). Associations were measured by linear regression and Receiver Operator Characteristics (ROC). RESULTS Serum levels of 8,9-epoxyeicosatrienoic acid (EET) (β(95%CI)=1.809(-0.71-2.91)), 14,15-dihydroxyeicosatrienoic acid (DHET) (β(95%CI)=0.827(0.34-1.31)), and 12-hydroxyeicosatetraenoic acid (β(95%CI)=4.090(1.92-6.26)) and anandamide (β(95%CI)=3.060(1.35-4.77)) were cross-sectionally associated with current self-reported knee pain scores (NRS item 3, average pain). Serum levels of 9- (β(95%CI)=0.467(0.18-0.75)) & 15-hydroxyeicosatetraenoic acid (β(95%CI)=0.759(0.29-1.22)), 14-hydroxydocosahexaenoic acid (β(95%CI)=0.483(0.24-0.73)), and the ratio of 8,9-EET:DHET (β(95%CI)=0.510(0.19-0.82)) were cross-sectionally associated with K/L scores. Baseline serum concentrations of 8,9-EET (β(95%CI)=2.166(0.89-3.44)), 5,6-DHET (β(95%CI)=152.179(69.39-234.97)), and 5-HETE (β(95%CI)=1.724(0.677-2.77) showed positive longitudinal associations with follow-up knee pain scores (NRS item 3, average pain). Combined serum 8,9-EET and 5-HETE concentration showed the strongest longitudinal association (β(95%CI)=1.156(0.54-1.77) with pain scores at 3 years, and ROC curves distinguished between participants with no pain and high pain scores at follow-up (AUC(95%CI)=0.71(0.61-0.82)). CONCLUSIONS Serum levels of a combination of hydroxylated metabolites of arachidonic acid may have prognostic utility for knee pain, providing a potential novel approach to identify people who are more likely to have debilitating pain in the future.
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Affiliation(s)
- James Turnbull
- Pain Centre Versus Arthritis, University of Nottingham, Medical School, Queen's Medical Centre, Nottingham, United Kingdom; NIHR Nottingham Biomedical Research Centre, University of Nottingham, Nottingham, United Kingdom; Centre for Analytical Bioscience, Advanced Materials and Healthcare Technology Division, School of Pharmacy, University of Nottingham, Nottingham, United Kingdom; School of Life Sciences, University of Nottingham, Medical School, Queen's Medical Centre, Nottingham, United Kingdom.
| | - Rakesh R Jha
- NIHR Nottingham Biomedical Research Centre, University of Nottingham, Nottingham, United Kingdom; Centre for Analytical Bioscience, Advanced Materials and Healthcare Technology Division, School of Pharmacy, University of Nottingham, Nottingham, United Kingdom.
| | - Peter R W Gowler
- Pain Centre Versus Arthritis, University of Nottingham, Medical School, Queen's Medical Centre, Nottingham, United Kingdom; School of Life Sciences, University of Nottingham, Medical School, Queen's Medical Centre, Nottingham, United Kingdom.
| | - Rose Ferrands-Bentley
- Pain Centre Versus Arthritis, University of Nottingham, Medical School, Queen's Medical Centre, Nottingham, United Kingdom; Academic Rheumatology, School of Medicine, University of Nottingham, Nottingham, United Kingdom.
| | - Dong-Hyun Kim
- Pain Centre Versus Arthritis, University of Nottingham, Medical School, Queen's Medical Centre, Nottingham, United Kingdom; NIHR Nottingham Biomedical Research Centre, University of Nottingham, Nottingham, United Kingdom; Centre for Analytical Bioscience, Advanced Materials and Healthcare Technology Division, School of Pharmacy, University of Nottingham, Nottingham, United Kingdom.
| | - David A Barrett
- Pain Centre Versus Arthritis, University of Nottingham, Medical School, Queen's Medical Centre, Nottingham, United Kingdom; NIHR Nottingham Biomedical Research Centre, University of Nottingham, Nottingham, United Kingdom; Centre for Analytical Bioscience, Advanced Materials and Healthcare Technology Division, School of Pharmacy, University of Nottingham, Nottingham, United Kingdom.
| | - Aliya Sarmanova
- Pain Centre Versus Arthritis, University of Nottingham, Medical School, Queen's Medical Centre, Nottingham, United Kingdom; Academic Rheumatology, School of Medicine, University of Nottingham, Nottingham, United Kingdom.
| | - Gwen S Fernandes
- Pain Centre Versus Arthritis, University of Nottingham, Medical School, Queen's Medical Centre, Nottingham, United Kingdom; Academic Rheumatology, School of Medicine, University of Nottingham, Nottingham, United Kingdom.
| | - Michael Doherty
- Pain Centre Versus Arthritis, University of Nottingham, Medical School, Queen's Medical Centre, Nottingham, United Kingdom; NIHR Nottingham Biomedical Research Centre, University of Nottingham, Nottingham, United Kingdom; Academic Rheumatology, School of Medicine, University of Nottingham, Nottingham, United Kingdom.
| | - Weiya Zhang
- Pain Centre Versus Arthritis, University of Nottingham, Medical School, Queen's Medical Centre, Nottingham, United Kingdom; NIHR Nottingham Biomedical Research Centre, University of Nottingham, Nottingham, United Kingdom; Academic Rheumatology, School of Medicine, University of Nottingham, Nottingham, United Kingdom.
| | - David A Walsh
- Pain Centre Versus Arthritis, University of Nottingham, Medical School, Queen's Medical Centre, Nottingham, United Kingdom; NIHR Nottingham Biomedical Research Centre, University of Nottingham, Nottingham, United Kingdom; Academic Rheumatology, School of Medicine, University of Nottingham, Nottingham, United Kingdom.
| | - Ana M Valdes
- Pain Centre Versus Arthritis, University of Nottingham, Medical School, Queen's Medical Centre, Nottingham, United Kingdom; NIHR Nottingham Biomedical Research Centre, University of Nottingham, Nottingham, United Kingdom; Academic Rheumatology, School of Medicine, University of Nottingham, Nottingham, United Kingdom.
| | - Victoria Chapman
- Pain Centre Versus Arthritis, University of Nottingham, Medical School, Queen's Medical Centre, Nottingham, United Kingdom; NIHR Nottingham Biomedical Research Centre, University of Nottingham, Nottingham, United Kingdom; School of Life Sciences, University of Nottingham, Medical School, Queen's Medical Centre, Nottingham, United Kingdom.
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Kyratzi P, Matika O, Brassington AH, Connie CE, Xu J, Barrett DA, Emes RD, Archibald AL, Paldi A, Sinclair KD, Wattis J, Rauch C. Investigative power of Genomic Informational Field Theory (GIFT) relative to GWAS for genotype-phenotype mapping. bioRxiv 2024:2024.04.16.589524. [PMID: 38659791 PMCID: PMC11042307 DOI: 10.1101/2024.04.16.589524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/26/2024]
Abstract
Identifying associations between phenotype and genotype is the fundamental basis of genetic analyses. Inspired by frequentist probability and the work of R.A. Fisher, genome-wide association studies (GWAS) extract information using averages and variances from genotype-phenotype datasets. Averages and variances are legitimated upon creating distribution density functions obtained through the grouping of data into categories. However, as data from within a given category cannot be differentiated, the investigative power of such methodologies is limited. Genomic Informational Field Theory (GIFT) is a method specifically designed to circumvent this issue. The way GIFT proceeds is opposite to that of GWAS. Whilst GWAS determines the extent to which genes are involved in phenotype formation (bottom-up approach), GIFT determines the degree to which the phenotype can select microstates (genes) for its subsistence (top-down approach). Doing so requires dealing with new genetic concepts, a.k.a. genetic paths, upon which significance levels for genotype-phenotype associations can be determined. By using different datasets obtained in ovis aries related to bone growth (Dataset-1) and to a series of linked metabolic and epigenetic pathways (Dataset-2), we demonstrate that removing the informational barrier linked to categories enhances the investigative and discriminative powers of GIFT, namely that GIFT extracts more information than GWAS. We conclude by suggesting that GIFT is an adequate tool to study how phenotypic plasticity and genetic assimilation are linked.
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Turnbull RE, Hafeez A, Sander KN, Barrett DA, Murphy GJ, Goodall AH. Unfractionated heparin reverses aspirin inhibition of platelets during coronary artery bypass graft surgery. Sci Rep 2024; 14:8572. [PMID: 38609431 PMCID: PMC11015001 DOI: 10.1038/s41598-024-58005-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Accepted: 03/25/2024] [Indexed: 04/14/2024] Open
Abstract
Unfractionated heparin (UFH) is an effective antithrombotic during surgery but has known adverse effects, in particular on platelets. A marked increase in platelet responsiveness has previously been observed in patients within minutes of receiving UFH, despite adequate inhibition by aspirin prior to heparin. We studied this phenomenon in patients undergoing cardiac artery bypass grafting (n = 17) to determine whether the effects of heparin were systemic or platelet-specific. All patients' platelets were fully inhibited by aspirin prior to surgery, but within 3 min of receiving heparin spontaneous aggregation and responses to arachidonic acid (AA) and ADP increased significantly (p ≥ 0.0002), and activated platelets were found in the circulation. While there was no rise in thromboxane in the plasma following heparin, levels of the major platelet 12-lipoxygenase product, 12-HETE, rose significantly. Mixing experiments demonstrated that the changes caused by heparin resided primarily in the platelets, while addition of AA pathway inhibitors, and analysis of oxylipins provided evidence that, following heparin, aggregating platelets regained their ability to synthesise thromboxane. These findings highlight potentially unrecognised pro-thrombotic and pro-inflammatory changes during CABG surgery, and provide further evidence of adverse effects associated with UFH.
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Affiliation(s)
- Robert E Turnbull
- Department of Cardiovascular Sciences, University of Leicester and NIHR Cardiovascular Biomedical Research Centre, Glenfield Hospital, Leicester, UK.
- The Leicester Institute of Structural and Chemical Biology and Department of Molecular and Cell Biology, University of Leicester, Lancaster Road, Leicester, LE1 7HB, UK.
| | - Azhar Hafeez
- Department of Cardiovascular Sciences, University of Leicester and NIHR Cardiovascular Biomedical Research Centre, Glenfield Hospital, Leicester, UK
- Division of Clinical Medicine, School of Medicine and Population Health, University of Sheffield, Sheffield, S10 2HQ, UK
| | - Katrin N Sander
- Centre for Analytical Bioscience, Advanced Materials and Healthcare Division, School of Pharmacy, University of Nottingham, Nottingham, UK
| | - David A Barrett
- Centre for Analytical Bioscience, Advanced Materials and Healthcare Division, School of Pharmacy, University of Nottingham, Nottingham, UK
| | - Gavin J Murphy
- Department of Cardiovascular Sciences, University of Leicester and NIHR Cardiovascular Biomedical Research Centre, Glenfield Hospital, Leicester, UK
| | - Alison H Goodall
- Department of Cardiovascular Sciences, University of Leicester and NIHR Cardiovascular Biomedical Research Centre, Glenfield Hospital, Leicester, UK
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Turnbull J, Jha RR, Barrett DA, Valdes AM, Alderson J, Williams A, Vincent TL, Watt FE, Chapman V. The Effect of Acute Knee Injuries and Related Knee Surgery on Serum Levels of Pro- and Anti-inflammatory Lipid Mediators and Their Associations With Knee Symptoms. Am J Sports Med 2024; 52:987-997. [PMID: 38406872 PMCID: PMC10943603 DOI: 10.1177/03635465241228209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Accepted: 11/29/2023] [Indexed: 02/27/2024]
Abstract
BACKGROUND Despite an acute knee injury being a major risk factor for osteoarthritis, the factors that initiate and maintain this risk of longer-term knee symptoms are poorly understood. Bioactive lipids derived from omega-3 and -6 polyunsaturated fatty acids have key roles in the regulation of the inflammatory response and have been linked to joint damage and osteoarthritis pain in translational models. HYPOTHESIS There would be associations between systemic levels of bioactive lipids and knee symptoms longitudinally after an acute knee injury and related knee surgery. STUDY DESIGN Controlled laboratory study. METHODS This study analyzed a subset of young, active adults who had sustained an acute knee injury (recruited via a surgical care pathway) and healthy age- and sex-matched controls. Surgery, if performed, was conducted after the baseline serum sample was taken and before the 3-month and 2-year visits. Liquid chromatography-tandem mass spectrometry of 41 bioactive lipids was carried out in sera of (1) 47 injured participants (median age, 28 years) collected at baseline (median, 24 days after injury), 3 months, and 2 years, along with the Knee injury and Osteoarthritis Outcome Score, and (2) age- and sex-matched controls. RESULTS Levels of the omega-3 polyunsaturated fatty acids eicosapentaenoic acid (P≤ .0001) and docosahexaenoic acid (P≤ .0001) and the pro-resolving lipid mediators 17- and 14-hydroxydocosahexaenoic acid, and 18-hydroxyeicosapentaenoic acid were all significantly greater at baseline in injured participants compared with the later time points and also higher than in healthy controls (P = .0019 and P≤ .0001, respectively). Levels of pro-inflammatory prostaglandins E2 and D2, leukotriene B4, and thromboxane B2 were significantly lower at baseline compared with the later time points. Higher levels of 8,9-, 11,12-, and 14,15-dihydroxyeicosatrienoic acid (DHET) were cross-sectionally associated with more severe knee pain/symptoms according to the Knee injury and Osteoarthritis Outcome Score at 2 years (P = .0004, R2 = 0.251; P = .0002, R2 = 0.278; and P = .0012, R2 = 0.214, respectively). CONCLUSION The profile of pro-resolving versus pro-inflammatory lipids at baseline suggests an initial activation of pro-resolution pathways, followed by the later activation of pro-inflammatory pathways. CLINICAL RELEVANCE In this largely surgically managed cohort, the association of soluble epoxide hydrolase metabolites, the DHETs, with more severe knee symptoms at 2 years provides a rationale for further investigation into the role of this pathway in persisting knee symptoms in this population, including potential therapeutic strategies.
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Affiliation(s)
- James Turnbull
- NIHR Nottingham Biomedical Research Centre, University of Nottingham, Nottingham, UK
- Centre for Analytical Bioscience, Advanced Materials and Healthcare Technologies Division, School of Pharmacy, University of Nottingham, Nottingham, UK
- School of Life Sciences, University of Nottingham, Nottingham, UK
| | - Rakesh R. Jha
- NIHR Nottingham Biomedical Research Centre, University of Nottingham, Nottingham, UK
- Centre for Analytical Bioscience, Advanced Materials and Healthcare Technologies Division, School of Pharmacy, University of Nottingham, Nottingham, UK
| | - David A. Barrett
- NIHR Nottingham Biomedical Research Centre, University of Nottingham, Nottingham, UK
- Centre for Analytical Bioscience, Advanced Materials and Healthcare Technologies Division, School of Pharmacy, University of Nottingham, Nottingham, UK
| | - Ana M. Valdes
- NIHR Nottingham Biomedical Research Centre, University of Nottingham, Nottingham, UK
- Injury, Recovery, and Inflammation Sciences, School of Medicine, University of Nottingham, Nottingham, UK
| | - Jennifer Alderson
- Centre for Osteoarthritis Pathogenesis Versus Arthritis, Kennedy Institute of Rheumatology, University of Oxford, Oxford, UK
| | - Andrew Williams
- Centre for Osteoarthritis Pathogenesis Versus Arthritis, Kennedy Institute of Rheumatology, University of Oxford, Oxford, UK
- Fortius Clinic, London, UK
| | - Tonia L. Vincent
- Centre for Osteoarthritis Pathogenesis Versus Arthritis, Kennedy Institute of Rheumatology, University of Oxford, Oxford, UK
| | - Fiona E. Watt
- Centre for Osteoarthritis Pathogenesis Versus Arthritis, Kennedy Institute of Rheumatology, University of Oxford, Oxford, UK
- Department of Immunology and Inflammation, Imperial College London, London, UK
| | - Victoria Chapman
- NIHR Nottingham Biomedical Research Centre, University of Nottingham, Nottingham, UK
- School of Life Sciences, University of Nottingham, Nottingham, UK
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Garduño-Jiménez AL, Durán-Álvarez JC, Ortori CA, Abdelrazig S, Barrett DA, Gomes RL. Delivering on sustainable development goals in wastewater reuse for agriculture: Initial prioritization of emerging pollutants in the Tula Valley, Mexico. Water Res 2023; 238:119903. [PMID: 37121200 DOI: 10.1016/j.watres.2023.119903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Revised: 03/18/2023] [Accepted: 03/20/2023] [Indexed: 05/17/2023]
Abstract
Wastewater reuse for agricultural irrigation is a widespread beneficial practice, in line with the sustainable development goals. However, contaminants of emerging concern (CECs) present in wastewater, such as pharmaceuticals, pose an environmental risk. The Tula Valley in Mexico is one of the world's largest agricultural areas reusing wastewater for agriculture. However, no untargeted CEC monitoring has been undertaken there, limiting the information available to prioritise local environmental risk assessment. Furthermore, CEC environmental presence in the Global South remains understudied, compared to the Global North. There is a risk that current research efforts focus on CECs predominantly found in the Global North, leading to strategies that may not be appropriate for the Global South where the pollution profile may be different. To address these knowledge gaps, a sampling campaign at five key sites in the Tula Valley was undertaken and samples analysed using multi-residue targeted and untargeted liquid chromatography mass spectrometry methods. Using the targeted data, ten CECs were found to be of environmental risk for at least one sampling site: 4‑tert-octylphenol, acetaminophen, bezafibrate, diclofenac, erythromycin, levonorgestrel, simvastatin, sulfamethoxazole, trimethoprim and tramadol as well as total estrogenicity (combination of three steroid hormones). Six of these have not been previously quantified in the Tula Valley. Over one hundred pollutants never previously measured in the area were identified through untargeted analysis supported by library spectrum match. Examples include diclofenac and carbamazepine metabolites and area-specific pollutants such as the herbicide fomesafen. This research contributes to characterising the presence of CECs in the Global South, as well as providing site-specific data for the Tula Valley.
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Affiliation(s)
- Andrea-Lorena Garduño-Jiménez
- Food Water Waste Research Group. Faculty of Engineering, University of Nottingham, University Park, Nottinghamshire, NG7 2RD, United Kingdom
| | - Juan-Carlos Durán-Álvarez
- Instituto de Ciencias Aplicadas y Tecnología, Universidad Nacional Autónoma de México, Circuito Exterior S/N, Ciudad Universitaria, Coyoacan, Ciudad de México 04510, Mexico
| | - Catharine A Ortori
- Centre for Analytical Bioscience, Advanced Materials and Healthcare Technologies Division, School of Pharmacy, University of Nottingham, University Park, Nottinghamshire, NG7 2RD, United Kingdom
| | - Salah Abdelrazig
- Centre for Analytical Bioscience, Advanced Materials and Healthcare Technologies Division, School of Pharmacy, University of Nottingham, University Park, Nottinghamshire, NG7 2RD, United Kingdom
| | - David A Barrett
- Centre for Analytical Bioscience, Advanced Materials and Healthcare Technologies Division, School of Pharmacy, University of Nottingham, University Park, Nottinghamshire, NG7 2RD, United Kingdom
| | - Rachel L Gomes
- Food Water Waste Research Group. Faculty of Engineering, University of Nottingham, University Park, Nottinghamshire, NG7 2RD, United Kingdom.
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Jaber MA, de Falco B, Abdelrazig S, Ortori CA, Barrett DA, Kim DH. Advantages of using biologically generated 13C-labelled multiple internal standards for stable isotope-assisted LC-MS-based lipidomics. Anal Methods 2023. [PMID: 37309212 DOI: 10.1039/d3ay00460k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
In comprehensive lipidomics studies, accurate quantification is essential but biological and/or clinical relevance is often hindered due to unwanted variations such as lipid degradation during sample preparation, matrix effects and non-linear responses of analytical instruments. In addition, the wide chemical diversity of lipids can complicate the accurate identification of individual lipids. These analytical limitations can potentially be corrected efficiently by the use of lipid-specific isotopically labelled internal standards (IS) but currently such IS mixtures have limited coverage of the mammalian lipidome. In this study, an in vivo13C labelling strategy was employed to explore four species (Escherichia coli, Arthrospira platensis, Saccharomyces cerevisiae and Pichia pastoris) as a source of 13C-labelled internal standards (13C-ISs) for more accurate and quantitative liquid chromatography (LC)-mass spectrometry (MS)-based lipidomics. Results showed that extracts from 13C-labelled P. pastoris and S. cerevisiae contain the highest percentage of uniformly labelled lipids (both 83% compared to 67% and 69% in A. platensis and E. coli, respectively) and 13C-labelled P. pastoris extract was identified as the optimum source of 13C-ISs for comprehensive data normalisation to correct unwanted variations during sample preparation and LC-MS analysis. Overall, use of a biologically generated 13C-IS lipid mixture of 357 identified lipid ions resulted in significant reduction in the lipid CV% of normalisation compared with other normalisation methods using total ion counts or a commercially available deuterated internal standard mixture. This improved normalisation using 13C-IS was confirmed in a typical lipidomics analysis using a large number of samples (>100+) and long analysis time (>70 h). This study highlights the benefit of an in vivo labelling strategy for reducing technical and analytical variations introduced during sample preparation and analysis in lipidomics studies.
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Affiliation(s)
- Malak A Jaber
- Faculty of Pharmacy and Medical Sciences, University of Petra, Amman, Jordan
- Centre for Analytical Bioscience, Advanced Materials and Healthcare Technologies Division, School of Pharmacy, University of Nottingham, University Park, Nottingham, NG7 2RD, UK.
| | - Bruna de Falco
- Centre for Analytical Bioscience, Advanced Materials and Healthcare Technologies Division, School of Pharmacy, University of Nottingham, University Park, Nottingham, NG7 2RD, UK.
| | - Salah Abdelrazig
- Centre for Analytical Bioscience, Advanced Materials and Healthcare Technologies Division, School of Pharmacy, University of Nottingham, University Park, Nottingham, NG7 2RD, UK.
| | - Catharine A Ortori
- Centre for Analytical Bioscience, Advanced Materials and Healthcare Technologies Division, School of Pharmacy, University of Nottingham, University Park, Nottingham, NG7 2RD, UK.
| | - David A Barrett
- Centre for Analytical Bioscience, Advanced Materials and Healthcare Technologies Division, School of Pharmacy, University of Nottingham, University Park, Nottingham, NG7 2RD, UK.
| | - Dong-Hyun Kim
- Centre for Analytical Bioscience, Advanced Materials and Healthcare Technologies Division, School of Pharmacy, University of Nottingham, University Park, Nottingham, NG7 2RD, UK.
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Dubern JF, Halliday N, Cámara M, Winzer K, Barrett DA, Hardie KR, Williams P. Growth rate and nutrient limitation as key drivers of extracellular quorum sensing signal molecule accumulation in Pseudomonas aeruginosa. Microbiology (Reading) 2023; 169. [PMID: 37018121 DOI: 10.1099/mic.0.001316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 04/06/2023]
Abstract
In Pseudomonas aeruginosa, quorum sensing (QS) depends on an interconnected regulatory hierarchy involving the Las, Rhl and Pqs systems, which are collectively responsible for the co-ordinated synthesis of a diverse repertoire of N-acylhomoserine lactones (AHLs) and 2-alkyl-4-quinolones (AQs). Apparent population density-dependent phenomena such as QS may, however, be due to growth rate and/or nutrient exhaustion in batch culture. Using continuous culture, we show that growth rate and population density independently modulate the accumulation of AHLs and AQs such that the highest concentrations are observed at a slow growth rate and high population density. Carbon source (notably succinate), nutrient limitation (C, N, Fe, Mg) or growth at 25 °C generally reduces AHL and AQ levels, except for P and S limitation, which result in substantially higher concentrations of AQs, particularly AQ N-oxides, despite the lower population densities achieved. Principal component analysis indicates that ~26 % variation is due to nutrient limitation and a further 30 % is due to growth rate. The formation of N-(3-oxododecanoyl)-l-homoserine lactone (3OC12-HSL) turnover products such as the ring opened form and tetramic acid varies with the limiting nutrient limitation and anaerobiosis. Differential ratios of N-butanoyl-homoserine lactone (C4-HSL), 3OC12-HSL and the AQs as a function of growth environment are clearly apparent. Inactivation of QS by mutation of three key genes required for QS signal synthesis (lasI, rhlI and pqsA) substantially increases the concentrations of key substrates from the activated methyl cycle and aromatic amino acid biosynthesis, as well as ATP levels, highlighting the energetic drain that AHL and AQ synthesis and hence QS impose on P. aeruginosa.
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Affiliation(s)
- Jean-Frédéric Dubern
- National Biofilms Innovation Centre, Biodiscovery Institute, School of Life Sciences, University of Nottingham, Nottingham NG7 2RD, UK
| | - Nigel Halliday
- National Biofilms Innovation Centre, Biodiscovery Institute, School of Life Sciences, University of Nottingham, Nottingham NG7 2RD, UK
| | - Miguel Cámara
- National Biofilms Innovation Centre, Biodiscovery Institute, School of Life Sciences, University of Nottingham, Nottingham NG7 2RD, UK
| | - Klaus Winzer
- National Biofilms Innovation Centre, Biodiscovery Institute, School of Life Sciences, University of Nottingham, Nottingham NG7 2RD, UK
| | - David A Barrett
- Centre for Analytical Bioscience, Advanced Materials and Healthcare Technology Division, School of Pharmacy, University of Nottingham, Nottingham NG7 2RD, UK
| | - Kim R Hardie
- National Biofilms Innovation Centre, Biodiscovery Institute, School of Life Sciences, University of Nottingham, Nottingham NG7 2RD, UK
| | - Paul Williams
- National Biofilms Innovation Centre, Biodiscovery Institute, School of Life Sciences, University of Nottingham, Nottingham NG7 2RD, UK
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Baker M, Williams AD, Hooton SPT, Helliwell R, King E, Dodsworth T, María Baena-Nogueras R, Warry A, Ortori CA, Todman H, Gray-Hammerton CJ, Pritchard ACW, Iles E, Cook R, Emes RD, Jones MA, Kypraios T, West H, Barrett DA, Ramsden SJ, Gomes RL, Hudson C, Millard AD, Raman S, Morris C, Dodd CER, Kreft JU, Hobman JL, Stekel DJ. Antimicrobial resistance in dairy slurry tanks: A critical point for measurement and control. Environ Int 2022; 169:107516. [PMID: 36122459 DOI: 10.1016/j.envint.2022.107516] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Revised: 09/09/2022] [Accepted: 09/09/2022] [Indexed: 06/15/2023]
Abstract
Waste from dairy production is one of the largest sources of contamination from antimicrobial resistant bacteria (ARB) and genes (ARGs) in many parts of the world. However, studies to date do not provide necessary evidence to inform antimicrobial resistance (AMR) countermeasures. We undertook a detailed, interdisciplinary, longitudinal analysis of dairy slurry waste. The slurry contained a population of ARB and ARGs, with resistances to current, historical and never-used on-farm antibiotics; resistances were associated with Gram-negative and Gram-positive bacteria and mobile elements (ISEcp1, Tn916, Tn21-family transposons). Modelling and experimental work suggested that these populations are in dynamic equilibrium, with microbial death balanced by fresh input. Consequently, storing slurry without further waste input for at least 60 days was predicted to reduce ARB spread onto land, with > 99 % reduction in cephalosporin resistant Escherichia coli. The model also indicated that for farms with low antibiotic use, further reductions are unlikely to reduce AMR further. We conclude that the slurry tank is a critical point for measurement and control of AMR, and that actions to limit the spread of AMR from dairy waste should combine responsible antibiotic use, including low total quantity, avoidance of human critical antibiotics, and choosing antibiotics with shorter half-lives, coupled with appropriate slurry storage.
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Affiliation(s)
- Michelle Baker
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, Leicestershire LE12 5RD, UK; School of Veterinary Medicine and Science, University of Nottingham, Sutton Bonington Campus, Loughborough, Leicestershire LE12 5RD, UK
| | - Alexander D Williams
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, Leicestershire LE12 5RD, UK
| | - Steven P T Hooton
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, Leicestershire LE12 5RD, UK; (a)Department of Genetics and Genome Biology, University of Leicester, University Road, Leicester LE1 7RH, UK
| | - Richard Helliwell
- School of Sociology and Social Policy, University of Nottingham, University Park Campus, Nottingham NG7 2RD, UK; School of Geography, University of Nottingham, University Park Campus, Nottingham NG7 2RD, UK; Ruralis, University Centre Dragvoll, N-7491 Trondheim, Norway
| | - Elizabeth King
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, Leicestershire LE12 5RD, UK
| | - Thomas Dodsworth
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, Leicestershire LE12 5RD, UK; ResChem Analytical Ltd, 8 Jubilee Parkway, Jubilee Business Park, Stores Road, Derby DE21 4BJ, UK
| | - Rosa María Baena-Nogueras
- Food Water Waste Research Group, Faculty of Engineering, University of Nottingham, University Park Campus, Nottingham NG7 2RD, UK
| | - Andrew Warry
- Advanced Data Analysis Centre, University of Nottingham, Sutton Bonington Campus, Loughborough, Leicestershire LE12 5RD, UK
| | - Catherine A Ortori
- School of Pharmacy, University of Nottingham, University Park Campus, Nottingham NG7 2RD, UK
| | - Henry Todman
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, Leicestershire LE12 5RD, UK; School of Mathematical Sciences, University of Nottingham, University Park Campus, Nottingham NG7 2RD, UK
| | - Charlotte J Gray-Hammerton
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, Leicestershire LE12 5RD, UK; Department of Zoology, University of Oxford, 11a Mansfield Road, Oxford OX1 3SZ, UK
| | - Alexander C W Pritchard
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, Leicestershire LE12 5RD, UK
| | - Ethan Iles
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, Leicestershire LE12 5RD, UK
| | - Ryan Cook
- School of Veterinary Medicine and Science, University of Nottingham, Sutton Bonington Campus, Loughborough, Leicestershire LE12 5RD, UK
| | - Richard D Emes
- School of Veterinary Medicine and Science, University of Nottingham, Sutton Bonington Campus, Loughborough, Leicestershire LE12 5RD, UK
| | - Michael A Jones
- School of Veterinary Medicine and Science, University of Nottingham, Sutton Bonington Campus, Loughborough, Leicestershire LE12 5RD, UK
| | - Theodore Kypraios
- School of Mathematical Sciences, University of Nottingham, University Park Campus, Nottingham NG7 2RD, UK
| | - Helen West
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, Leicestershire LE12 5RD, UK
| | - David A Barrett
- School of Pharmacy, University of Nottingham, University Park Campus, Nottingham NG7 2RD, UK
| | - Stephen J Ramsden
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, Leicestershire LE12 5RD, UK
| | - Rachel L Gomes
- Food Water Waste Research Group, Faculty of Engineering, University of Nottingham, University Park Campus, Nottingham NG7 2RD, UK
| | - Chris Hudson
- School of Veterinary Medicine and Science, University of Nottingham, Sutton Bonington Campus, Loughborough, Leicestershire LE12 5RD, UK
| | - Andrew D Millard
- (a)Department of Genetics and Genome Biology, University of Leicester, University Road, Leicester LE1 7RH, UK
| | - Sujatha Raman
- School of Sociology and Social Policy, University of Nottingham, University Park Campus, Nottingham NG7 2RD, UK; Centre for Public Awareness of Science, Australian National University, Linnaeus Way, Acton ACT 2601, Canberra, Australia
| | - Carol Morris
- School of Geography, University of Nottingham, University Park Campus, Nottingham NG7 2RD, UK
| | - Christine E R Dodd
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, Leicestershire LE12 5RD, UK
| | - Jan-Ulrich Kreft
- School of Biosciences, University of Birmingham, Edgbaston, Birmingham B15 2TT
| | - Jon L Hobman
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, Leicestershire LE12 5RD, UK
| | - Dov J Stekel
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, Leicestershire LE12 5RD, UK; Department of Mathematics and Applied Mathematics, University of Johannesburg, Auckland Park Kingsway Campus, Rossmore, Johannesburg, South Africa.
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9
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Gowler PRW, Turnbull J, Shahtaheri M, Walsh DA, Barrett DA, Chapman V. Interplay between cellular changes in the knee joint, circulating lipids and pain behaviours in a slowly progressing murine model of osteoarthritis. Eur J Pain 2022; 26:2213-2226. [PMID: 36097797 PMCID: PMC9826505 DOI: 10.1002/ejp.2036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Revised: 08/26/2022] [Accepted: 09/10/2022] [Indexed: 01/11/2023]
Abstract
BACKGROUND Synovial inflammation has known contributions to chronic osteoarthritis (OA) pain, but the potential role in transitions from early to late stages of OA pain is unclear. METHODS The slowly progressing surgical destabilization of the medial meniscus (DMM) murine OA model and sham control, was used in male C57BL/6J mice to investigate the interplay between knee inflammation, plasma pro- and anti-inflammatory oxylipins and pain responses during OA progression. Changes in joint histology, macrophage infiltration, chemokine receptor CX3CR1 expression, weight bearing asymmetry, and paw withdrawal thresholds were quantified 4, 8 and 16 weeks after surgery. Plasma levels of multiple bioactive lipid mediators were quantified using liquid chromatography with tandem mass-spectrometry (LC-MS/MS). RESULTS Structural joint damage was evident at 8 weeks post-DMM surgery onwards. At 16 weeks post-DMM surgery, synovial scores, numbers of CD68 and CD206 positive macrophages and pain responses were significantly increased. Plasma levels of oxylipins were negatively correlated with joint damage and synovitis scores at 4 and 8 weeks post-DMM surgery. Higher circulating levels of the pro-resolving oxylipin pre-cursor 17-HDHA were associated with lower weight bearing asymmetry at week 16. CONCLUSIONS The transition to chronic OA pathology and pain is likely influenced by both joint inflammation and plasma oxylipin mediators of inflammation and levels of pro-resolution molecules. SIGNIFICANCE Using a slow progressing surgical model of osteoarthritis we show how the changing balance between local and systemic inflammation may be of importance in the progression of pain behaviours during the transition to chronic osteoarthritis pain.
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Affiliation(s)
- Peter R. W. Gowler
- Pain Centre Versus Arthritis and NIHR Nottingham Biomedical Research Centre, School of Life SciencesUniversity of NottinghamNottinghamUK
| | - James Turnbull
- Centre for Analytical Bioscience, Advanced Materials and Healthcare Technologies Division, School of PharmacyUniversity of NottinghamNottinghamUK
| | - Mohsen Shahtaheri
- Pain Centre Versus Arthritis and NIHR Nottingham Biomedical Research Centre, School of MedicineUniversity of NottinghamNottinghamUK
| | - David A. Walsh
- Pain Centre Versus Arthritis and NIHR Nottingham Biomedical Research Centre, School of MedicineUniversity of NottinghamNottinghamUK
| | - David A. Barrett
- Centre for Analytical Bioscience, Advanced Materials and Healthcare Technologies Division, School of PharmacyUniversity of NottinghamNottinghamUK
| | - Victoria Chapman
- Pain Centre Versus Arthritis and NIHR Nottingham Biomedical Research Centre, School of Life SciencesUniversity of NottinghamNottinghamUK
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10
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Garduño-Jiménez AL, Durán-Álvarez JC, Cortés-Lagunes RS, Barrett DA, Gomes RL. Translating wastewater reuse for irrigation from OECD Guidelines: Tramadol sorption and desorption in soil-water matrices. Chemosphere 2022; 305:135031. [PMID: 35605731 DOI: 10.1016/j.chemosphere.2022.135031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Revised: 05/09/2022] [Accepted: 05/17/2022] [Indexed: 06/15/2023]
Abstract
Treated and untreated wastewater is often used for agricultural irrigation and, despite the many benefits of this practice, it poses the risk of biologically active chemical pollutants (such as pharmaceuticals, like tramadol) entering the environment. The partitioning of tramadol between soil/water at environmentally relevant concentrations is important to understand its environmental toxicity. Kinetics and isotherm sorption studies based on the Organisation for Economic Cooperation and Development (OECD) 106 Guideline were undertaken, ensuring comparability to previous studies. Studies were undertaken in three soils of different characteristics using aqueous concentrations of tramadol from 500 ng L-1 (environmentally relevant) to 100 μg L-1 (comparable to previous studies). Two of the soils presented a significantly (p < 0.05) higher sorption at a lower initial tramadol concentration (5000 ng L-1), compared to 20,000 ng L-1. Hysteresis was observed in all studied soils, indicating the accumulation of tramadol. Higher sorption to soils correlated with higher clay content, with soil/water partitioning coefficients (Kd) of 5.5 ± 13.3, 2.5 ± 3.8 and 0.9 ± 3.0 L kg1 for soils with clay contents of 41.9%, 24.5% and 7.4%, respectively. Cation exchange was proposed as the main sorption mechanism for tramadol to soils when the pH was below tramadol's pKa values (9.41 and 13.08). A comparative kinetics study between tramadol in soil/calcium chloride buffer and soil/wastewater effluent demonstrated significantly higher (p < 0.05) tramadol sorption to soil from wastewater effluent. This has the environmental implication that clay soils will be able to retain tramadol from irrigation water, despite the organic content of the irrigation water. Therefore, our studies show that tramadol soil sorption is likely to be higher in agricultural environments reusing wastewater than that predicted from experiments using the OECD 106 Guideline calcium chloride buffer.
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Affiliation(s)
- Andrea-Lorena Garduño-Jiménez
- Food Water Waste Research Group. Faculty of Engineering, University of Nottingham, University Park, Nottinghamshire, NG7 2RD, United Kingdom
| | - Juan Carlos Durán-Álvarez
- Instituto de Ciencias Aplicadas y Tecnología, Universidad Nacional Autónoma de México, Circuito Exterior S/N, Ciudad Universitaria, Coyoacan, Ciudad de México, 04510, Mexico
| | - Ruth Silvana Cortés-Lagunes
- Instituto de Ciencias Aplicadas y Tecnología, Universidad Nacional Autónoma de México, Circuito Exterior S/N, Ciudad Universitaria, Coyoacan, Ciudad de México, 04510, Mexico
| | - David A Barrett
- Centre for Analytical Bioscience, Advanced Materials and Healthcare Technologies Division, School of Pharmacy University of Nottingham, University Park, Nottinghamshire, NG7 2RD, United Kingdom
| | - Rachel L Gomes
- Food Water Waste Research Group. Faculty of Engineering, University of Nottingham, University Park, Nottinghamshire, NG7 2RD, United Kingdom.
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11
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Feng W, Qin C, Abdelrazig S, Bai Z, Raji M, Darwish R, Chu Y, Ji L, Gray DA, Stocks MJ, Constantinescu CS, Barrett DA, Fischer PM, Gershkovich P. Vegetable oils composition affects the intestinal lymphatic transport and systemic bioavailability of co-administered lipophilic drug cannabidiol. Int J Pharm 2022; 624:121947. [PMID: 35753538 DOI: 10.1016/j.ijpharm.2022.121947] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2022] [Revised: 06/04/2022] [Accepted: 06/19/2022] [Indexed: 11/16/2022]
Abstract
Although natural sesame oil has been shown to facilitate the lymphatic delivery and oral bioavailability of the highly lipophilic drug cannabidiol (CBD), considerable variability remains an unresolved challenge. Vegetable oils differ substantially in composition, which could lead to differences in promotion of intestinal lymphatic transport of lipophilic drugs. Therefore, the differences in composition of sesame, sunflower, peanut, soybean, olive and coconut oils and their corresponding role as vehicles in promoting CBD lymphatic targeting and bioavailability were investigated in this study. The comparative analysis suggests that the fatty acids profile of vegetable oils is overall similar to the fatty acids profile in the corresponding chylomicrons in rat lymph. However, arachidonic acid (C20:4), was introduced to chylomicrons from endogenous nondietary sources. Overall, fatty acid composition of natural vegetable oils vehicles affected the intestinal lymphatic transport and bioavailability of CBD following oral administration in this work. Olive oil led to the highest concentration of CBD in the lymphatic system and in the systemic circulation in comparison to the other natural vegetable oils following oral administration in rats.
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Affiliation(s)
- Wanshan Feng
- School of Pharmacy, University of Nottingham, Nottingham, NG7 2RD, UK
| | - Chaolong Qin
- School of Pharmacy, University of Nottingham, Nottingham, NG7 2RD, UK
| | - Salah Abdelrazig
- School of Pharmacy, University of Nottingham, Nottingham, NG7 2RD, UK
| | - Ziyu Bai
- School of Pharmacy, University of Nottingham, Nottingham, NG7 2RD, UK
| | - Mekha Raji
- School of Pharmacy, University of Nottingham, Nottingham, NG7 2RD, UK; School of Pharmacy, Universita di Roma Tor Vergata, Rome
| | - Randa Darwish
- Division of Food, Nutrition and Dietetics, School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, Leicestershire LE12 5RD, UK
| | - YenJu Chu
- School of Pharmacy, University of Nottingham, Nottingham, NG7 2RD, UK; Tri-Service General Hospital, Medical supplies and maintenance office, National Defense Medical Center, Taipei, Taiwan
| | - Liuhang Ji
- School of Pharmacy, University of Nottingham, Nottingham, NG7 2RD, UK
| | - David A Gray
- Division of Food, Nutrition and Dietetics, School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, Leicestershire LE12 5RD, UK
| | - Michael J Stocks
- School of Pharmacy, University of Nottingham, Nottingham, NG7 2RD, UK
| | - Cris S Constantinescu
- Division of Clinical Neuroscience, University of Nottingham and Queen's Medical Centre, Nottingham, NG7 2UH, UK
| | - David A Barrett
- School of Pharmacy, University of Nottingham, Nottingham, NG7 2RD, UK
| | - Peter M Fischer
- School of Pharmacy, University of Nottingham, Nottingham, NG7 2RD, UK
| | - Pavel Gershkovich
- School of Pharmacy, University of Nottingham, Nottingham, NG7 2RD, UK.
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12
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Gowler PRW, Turnbull J, Shahtaheri M, Gohir S, Kelly T, McReynolds C, Yang J, Jha RR, Fernandes GS, Zhang W, Doherty M, Walsh DA, Hammock BD, Valdes AM, Barrett DA, Chapman V. Clinical and Preclinical Evidence for Roles of Soluble Epoxide Hydrolase in Osteoarthritis Knee Pain. Arthritis Rheumatol 2022; 74:623-633. [PMID: 34672113 PMCID: PMC8957539 DOI: 10.1002/art.42000] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Revised: 09/14/2021] [Accepted: 10/07/2021] [Indexed: 11/07/2022]
Abstract
OBJECTIVE Chronic pain due to osteoarthritis (OA) is a major clinical problem, and existing analgesics often have limited beneficial effects and/or adverse effects, necessitating the development of novel therapies. Epoxyeicosatrienoic acids (EETs) are endogenous antiinflammatory mediators, rapidly metabolized by soluble epoxide hydrolase (EH) to dihydroxyeicosatrienoic acids (DHETs). We undertook this study to assess whether soluble EH-driven metabolism of EETs to DHETs plays a critical role in chronic joint pain associated with OA and provides a new target for treatment. METHODS Potential associations of chronic knee pain with single-nucleotide polymorphisms (SNPs) in the gene-encoding soluble EH and with circulating levels of EETs and DHETs were investigated in human subjects. A surgically induced murine model of OA was used to determine the effects of both acute and chronic selective inhibition of soluble EH by N-[1-(1-oxopropy)-4-piperidinyl]-N'-(trifluoromethoxy)phenyl]-urea (TPPU) on weight-bearing asymmetry, hind paw withdrawal thresholds, joint histology, and circulating concentrations of EETs and DHETs. RESULTS In human subjects with chronic knee pain, 3 pain measures were associated with SNPs of the soluble EH gene EPHX2, and in 2 separate cohorts of subjects, circulating levels of EETs and DHETs were also associated with 3 pain measures. In the murine OA model, systemic administration of TPPU both acutely and chronically reversed established pain behaviors and decreased circulating levels of 8,9-DHET and 14,15-DHET. EET levels were unchanged by TPPU administration. CONCLUSION Our novel findings support a role of soluble EH in OA pain and suggest that inhibition of soluble EH and protection of endogenous EETs from catabolism represents a potential new therapeutic target for OA pain.
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Affiliation(s)
- Peter R. W. Gowler
- Pain Centre Versus Arthritis and NIHR Nottingham Biomedical Research Centre, School of Life Sciences. University of Nottingham, UK
| | - James Turnbull
- Pain Centre Versus Arthritis and NIHR Nottingham Biomedical Research Centre, School of Life Sciences. University of Nottingham, UK
- Centre for Analytical Bioscience, Advanced Materials and Healthcare Technologies Division, School of Pharmacy. University of Nottingham, UK
| | - Mohsen Shahtaheri
- Pain Centre Versus Arthritis and NIHR Nottingham Biomedical Research Centre, School of Medicine. University of Nottingham, UK
| | - Sameer Gohir
- Pain Centre Versus Arthritis and NIHR Nottingham Biomedical Research Centre, School of Medicine. University of Nottingham, UK
| | - Tony Kelly
- Pain Centre Versus Arthritis and NIHR Nottingham Biomedical Research Centre, School of Medicine. University of Nottingham, UK
| | - Cindy McReynolds
- Department of Entomology and Nematology, UC Davis Comprehensive Cancer Centre, University of California, Davis, USA
| | - Jun Yang
- Department of Entomology and Nematology, UC Davis Comprehensive Cancer Centre, University of California, Davis, USA
| | - Rakesh R. Jha
- Pain Centre Versus Arthritis and NIHR Nottingham Biomedical Research Centre, School of Life Sciences. University of Nottingham, UK
- Centre for Analytical Bioscience, Advanced Materials and Healthcare Technologies Division, School of Pharmacy. University of Nottingham, UK
| | - Gwen S. Fernandes
- Pain Centre Versus Arthritis and NIHR Nottingham Biomedical Research Centre, School of Medicine. University of Nottingham, UK
| | - Weiya Zhang
- Pain Centre Versus Arthritis and NIHR Nottingham Biomedical Research Centre, School of Medicine. University of Nottingham, UK
| | - Michael Doherty
- Pain Centre Versus Arthritis and NIHR Nottingham Biomedical Research Centre, School of Medicine. University of Nottingham, UK
| | - David A. Walsh
- Pain Centre Versus Arthritis and NIHR Nottingham Biomedical Research Centre, School of Medicine. University of Nottingham, UK
| | - Bruce D. Hammock
- Department of Entomology and Nematology, UC Davis Comprehensive Cancer Centre, University of California, Davis, USA
| | - Ana. M. Valdes
- Pain Centre Versus Arthritis and NIHR Nottingham Biomedical Research Centre, School of Medicine. University of Nottingham, UK
| | - David A. Barrett
- Centre for Analytical Bioscience, Advanced Materials and Healthcare Technologies Division, School of Pharmacy. University of Nottingham, UK
| | - Victoria Chapman
- Pain Centre Versus Arthritis and NIHR Nottingham Biomedical Research Centre, School of Life Sciences. University of Nottingham, UK
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13
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Vijay A, Kouraki A, Gohir S, Turnbull J, Kelly A, Chapman V, Barrett DA, Bulsiewicz WJ, Valdes AM. The anti-inflammatory effect of bacterial short chain fatty acids is partially mediated by endocannabinoids. Gut Microbes 2022; 13:1997559. [PMID: 34787065 PMCID: PMC8604388 DOI: 10.1080/19490976.2021.1997559] [Citation(s) in RCA: 32] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
The endocannabinoid (EC) system has pleiotropic functions in the body. It plays a key role in energy homeostasis and the development of metabolic disorders being a mediator in the relationship between the gut microbiota and host metabolism. In the current study we explore the functional interactions between the endocannabinoid system and the gut microbiome in modulating inflammatory markers. Using data from a 6 week exercise intervention (treatment n = 38 control n = 40) and a cross sectional validation cohort (n = 35), we measured the associations of 2-arachidonoylglycerol (2-AG), anandamide (AEA), N-oleoylethanolamine (OEA) and N-palmitoylethanolamine (PEA) with gut microbiome composition, gut derived metabolites (SCFAs) and inflammatory markers both cross-sectionally and longitudinally. At baseline AEA and OEA were positively associated with alpha diversity (β(SE) = .32 (.06), P = .002; .44 (.04), P < .001) and with SCFA producing bacteria such as Bifidobacterium (2-AG β(SE) = .21 (.10), P < .01; PEA β(SE) = .23 (.08), P < .01), Coprococcus 3 and Faecalibacterium (PEA β(SE) = .29 (.11), P = .01; .25 (.09), P < .01) and negatively associated with Collinsella (AEA β(SE) = -.31 (.12), P = .004). Additionally, we found AEA to be positively associated with SCFA Butyrate (β(SE) = .34 (.15), P = .01). AEA, OEA and PEA all increased significantly with the exercise intervention but remained constant in the control group. Changes in AEA correlated with SCFA butyrate and increases in AEA and PEA correlated with decreases in TNF-ɑ and IL-6 statistically mediating one third of the effect of SCFAs on these cytokines. Our data show that the anti-inflammatory effects of SCFAs are partly mediated by the EC system suggesting that there may be other pathways involved in the modulation of the immune system via the gut microbiome.
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Affiliation(s)
- Amrita Vijay
- Division of Rheumatology, Orthopedics and Dermatology, School of Medicine, University of Nottingham, Nottingham, UK,CONTACT Amrita Vijay Division of Rheumatology, Orthopedics and Dermatology, School of Medicine, University of Nottingham, Nottingham, UK
| | - Afroditi Kouraki
- Division of Rheumatology, Orthopedics and Dermatology, School of Medicine, University of Nottingham, Nottingham, UK,Nihr Nottingham Biomedical Research Centre, University of Nottingham, Nottingham, UK
| | - Sameer Gohir
- Division of Rheumatology, Orthopedics and Dermatology, School of Medicine, University of Nottingham, Nottingham, UK,Nihr Nottingham Biomedical Research Centre, University of Nottingham, Nottingham, UK
| | - James Turnbull
- Nihr Nottingham Biomedical Research Centre, University of Nottingham, Nottingham, UK,Arthritis Research Uk Pain Centre, University of Nottingham, Medical School, Queen’s Medical Centre, Nottingham, UK
| | - Anthony Kelly
- Division of Rheumatology, Orthopedics and Dermatology, School of Medicine, University of Nottingham, Nottingham, UK,Nihr Nottingham Biomedical Research Centre, University of Nottingham, Nottingham, UK
| | - Vicky Chapman
- Division of Rheumatology, Orthopedics and Dermatology, School of Medicine, University of Nottingham, Nottingham, UK,Arthritis Research Uk Pain Centre, University of Nottingham, Medical School, Queen’s Medical Centre, Nottingham, UK
| | - David A Barrett
- Nihr Nottingham Biomedical Research Centre, University of Nottingham, Nottingham, UK,DAB-Centre for Analytical Bioscience, Advanced Materials and Healthcare Technologies Division, School of Pharmacy, University of Nottingham, Nottingham, UK
| | | | - Ana M Valdes
- Division of Rheumatology, Orthopedics and Dermatology, School of Medicine, University of Nottingham, Nottingham, UK,Nihr Nottingham Biomedical Research Centre, University of Nottingham, Nottingham, UK
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14
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Turnbull J, Jha R, Ortori CA, Lunt E, Tighe PJ, Irving WL, Gohir SA, Kim DH, Valdes AM, Tarr AW, Barrett DA, Chapman V. Serum levels of pro-inflammatory lipid mediators and specialised pro-resolving molecules are increased in SARS-CoV-2 patients and correlate with markers of the adaptive immune response. J Infect Dis 2022; 225:2142-2154. [PMID: 34979019 PMCID: PMC8755389 DOI: 10.1093/infdis/jiab632] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Accepted: 01/02/2022] [Indexed: 12/15/2022] Open
Abstract
Background Specialized proresolution molecules (SPMs) halt the transition to chronic pathogenic inflammation. We aimed to quantify serum levels of pro- and anti-inflammatory bioactive lipids in severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) patients, and to identify potential relationships with innate responses and clinical outcome. Methods Serum from 50 hospital admitted inpatients (22 female, 28 male) with confirmed symptomatic SARS-CoV-2 infection and 94 age- and sex-matched controls collected prior to the pandemic (SARS-CoV-2 negative), were processed for quantification of bioactive lipids and anti-nucleocapsid and anti-spike quantitative binding assays. Results SARS-CoV-2 serum had significantly higher concentrations of omega-6–derived proinflammatory lipids and omega-6– and omega-3–derived SPMs, compared to the age- and sex-matched SARS-CoV-2–negative group, which were not markedly altered by age or sex. There were significant positive correlations between SPMs, proinflammatory bioactive lipids, and anti-spike antibody binding. Levels of some SPMs were significantly higher in patients with an anti-spike antibody value >0.5. Levels of linoleic acid and 5,6-dihydroxy-8Z,11Z,14Z-eicosatrienoic acid were significantly lower in SARS-CoV-2 patients who died. Conclusions SARS-CoV-2 infection was associated with increased levels of SPMs and other pro- and anti-inflammatory bioactive lipids, supporting the future investigation of the underlying enzymatic pathways, which may inform the development of novel treatments.
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Affiliation(s)
- James Turnbull
- NIHR Nottingham Biomedical Research Centre, Nottingham University Hospitals NHS Trust, Nottingham, UK.,Centre for Analytical Bioscience, Advanced Materials and Healthcare Technologies Division, School of Pharmacy, University of Nottingham, Nottingham, UK.,School of Life Sciences, Faculty of Medicine and Health Sciences, The University of Nottingham, Nottingham, UK
| | - Rakesh Jha
- NIHR Nottingham Biomedical Research Centre, Nottingham University Hospitals NHS Trust, Nottingham, UK.,Centre for Analytical Bioscience, Advanced Materials and Healthcare Technologies Division, School of Pharmacy, University of Nottingham, Nottingham, UK
| | - Catherine A Ortori
- Centre for Analytical Bioscience, Advanced Materials and Healthcare Technologies Division, School of Pharmacy, University of Nottingham, Nottingham, UK
| | - Eleanor Lunt
- Department of Health Care for Older People (HCOP), Queen's Medical Centre, Nottingham University Hospitals NHS Trust, Nottingham, Nottinghamshire, UK
| | - Patrick J Tighe
- School of Life Sciences, Faculty of Medicine and Health Sciences, The University of Nottingham, Nottingham, UK
| | - William L Irving
- NIHR Nottingham Biomedical Research Centre, Nottingham University Hospitals NHS Trust, Nottingham, UK.,School of Life Sciences, Faculty of Medicine and Health Sciences, The University of Nottingham, Nottingham, UK
| | - Sameer A Gohir
- NIHR Nottingham Biomedical Research Centre, Nottingham University Hospitals NHS Trust, Nottingham, UK.,Academic Rheumatology, University of Nottingham, Nottingham, UK
| | - Dong-Hyun Kim
- Centre for Analytical Bioscience, Advanced Materials and Healthcare Technologies Division, School of Pharmacy, University of Nottingham, Nottingham, UK
| | - Ana M Valdes
- NIHR Nottingham Biomedical Research Centre, Nottingham University Hospitals NHS Trust, Nottingham, UK.,Pain Centre Versus Arthritis, University of Nottingham, Nottingham, UK.,Academic Rheumatology, University of Nottingham, Nottingham, UK
| | - Alexander W Tarr
- NIHR Nottingham Biomedical Research Centre, Nottingham University Hospitals NHS Trust, Nottingham, UK.,School of Life Sciences, Faculty of Medicine and Health Sciences, The University of Nottingham, Nottingham, UK
| | - David A Barrett
- NIHR Nottingham Biomedical Research Centre, Nottingham University Hospitals NHS Trust, Nottingham, UK.,Centre for Analytical Bioscience, Advanced Materials and Healthcare Technologies Division, School of Pharmacy, University of Nottingham, Nottingham, UK
| | - Victoria Chapman
- NIHR Nottingham Biomedical Research Centre, Nottingham University Hospitals NHS Trust, Nottingham, UK.,School of Life Sciences, Faculty of Medicine and Health Sciences, The University of Nottingham, Nottingham, UK.,Pain Centre Versus Arthritis, University of Nottingham, Nottingham, UK
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15
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Turnbull RE, Sander KN, Turnbull J, Barrett DA, Goodall AH. Profiling oxylipins released from human platelets activated through the GPVI collagen receptor. Prostaglandins Other Lipid Mediat 2021; 158:106607. [PMID: 34942378 DOI: 10.1016/j.prostaglandins.2021.106607] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Revised: 12/14/2021] [Accepted: 12/17/2021] [Indexed: 12/12/2022]
Abstract
In addition to haemostasis, platelets are involved in pathological processes, often driven by material released upon activation. Interaction between collagen and glycoprotein VI (GPVI) is a primary platelet stimulus that liberates arachidonic acid and linoleic acid from membrane phospholipids. These are oxidised by cyclooxygenase-1 (COX-1) and 12-lipoxygenase (12-LOX) to eicosanoids and other oxylipins with various biological properties. Using liquid chromatography-tandem mass spectrometry we found that GPVI-stimulated platelets released significant levels of ten oxylipins; the well documented TxA2 and 12-HETE, PGD2 and PGE2, as well as 8-, 9-, 11-, and 15-HETE, 9- and 13-HODE.1 Levels of oxylipins released from washed platelets mirrored those from platelets stimulated in the presence of plasma, indicating generation from intracellular, rather than exogenous AA/LA. Inhibition of COX-1 with aspirin, as expected, completely abolished production of TxA2 and PGD/E2, but also significantly inhibited the release of 11-HETE (89 ± 3%) and 9-HODE (74 ± 6%), and reduced 15-HETE and 13-HODE by ∼33 %. Inhibition of 12-LOX by either esculetin or ML355 inhibited the release of all oxylipins apart from 15-HETE. These findings suggest routes to modify the production of bioactive molecules released by activated platelets.
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Affiliation(s)
- Robert E Turnbull
- Department of Cardiovascular Sciences, University of Leicester and NIHR Cardiovascular Biomedical Research Unit, Glenfield Hospital, Leicester, UK
| | - Katrin N Sander
- Centre for Analytical Bioscience, Advanced Materials and Healthcare Division, School of Pharmacy, University of Nottingham, Nottingham, UK
| | - James Turnbull
- Centre for Analytical Bioscience, Advanced Materials and Healthcare Division, School of Pharmacy, University of Nottingham, Nottingham, UK
| | - David A Barrett
- Centre for Analytical Bioscience, Advanced Materials and Healthcare Division, School of Pharmacy, University of Nottingham, Nottingham, UK
| | - Alison H Goodall
- Department of Cardiovascular Sciences, University of Leicester and NIHR Cardiovascular Biomedical Research Unit, Glenfield Hospital, Leicester, UK.
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Zain NMM, Webb K, Stewart I, Halliday N, Barrett DA, Nash EF, Whitehouse JL, Honeybourne D, Smyth AR, Forrester DL, Knox AJ, Williams P, Fogarty A, Cámara M, Bruce KD, Barr HL. 2-Alkyl-4-quinolone quorum sensing molecules are biomarkers for culture-independent Pseudomonas aeruginosa burden in adults with cystic fibrosis. J Med Microbiol 2021; 70. [PMID: 34596013 DOI: 10.1099/jmm.0.001420] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Introduction. Pseudomonas aeruginosa produces quorum sensing signalling molecules including 2-alkyl-4-quinolones (AQs), which regulate virulence factor production in the cystic fibrosis (CF) airways.Hypothesis/Gap statement. Culture can lead to condition-dependent artefacts which may limit the potential insights and applications of AQs as minimally-invasive biomarkers of bacterial load.Aim. We aimed to use culture-independent methods to explore the correlations between AQ levels and live P. aeruginosa load in adults with CF.Methodology. Seventy-five sputum samples at clinical stability and 48 paired sputum samples obtained at the beginning and end of IV antibiotics for a pulmonary exacerbation in adults with CF were processed using a viable cell separation technique followed by quantitative P. aeruginosa polymerase chain reaction (qPCR). Live P. aeruginosa qPCR load was compared with the concentrations of three AQs (HHQ, NHQ and HQNO) detected in sputum, plasma and urine.Results. At clinical stability and the beginning of IV antibiotics for pulmonary exacerbation, HHQ, NHQ and HQNO measured in sputum, plasma and urine were consistently positively correlated with live P. aeruginosa qPCR load in sputum, compared to culture. Following systemic antibiotics live P. aeruginosa qPCR load decreased significantly (P<0.001) and was correlated with a reduction in plasma NHQ (plasma: r=0.463, P=0.003).Conclusion. In adults with CF, AQ concentrations correlated more strongly with live P. aeruginosa bacterial load measured by qPCR compared to traditional culture. Prospective studies are required to assess the potential of systemic AQs as biomarkers of P. aeruginosa bacterial burden.
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Affiliation(s)
- Nur Masirah M Zain
- Institute of Pharmaceutical Science, King's College London, London, UK.,Nottingham NIHR Biomedical Research Centre, Nottingham MRC Molecular Pathology Node, Nottingham, UK
| | - Karmel Webb
- Nottingham NIHR Biomedical Research Centre, Nottingham MRC Molecular Pathology Node, Nottingham, UK.,Division of Epidemiology and Public Health, University of Nottingham, City Hospital Campus, Nottingham, UK
| | - Iain Stewart
- Nottingham NIHR Biomedical Research Centre, Nottingham MRC Molecular Pathology Node, Nottingham, UK.,National Heart and Lung Institute, Imperial College London, London, UK
| | - Nigel Halliday
- National Biofilms Innovation Centre, University of Nottingham Biodiscovery Institute, School of Life Sciences, University of Nottingham, Nottingham, UK
| | - David A Barrett
- Centre for Analytical Bioscience, Division of Advanced Materials and Healthcare Technologies, School of Pharmacy, University of Nottingham, Nottingham, UK
| | - Edward F Nash
- West Midlands Adult CF Centre, University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK
| | - Joanna L Whitehouse
- West Midlands Adult CF Centre, University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK
| | - David Honeybourne
- West Midlands Adult CF Centre, University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK
| | - Alan R Smyth
- Nottingham NIHR Biomedical Research Centre, Nottingham MRC Molecular Pathology Node, Nottingham, UK.,Division of Child Health, Obstetrics and Gynaecology, University of Nottingham, Nottingham, UK
| | - Douglas L Forrester
- University of Queensland, Northside Clinical Unit, Brisbane, Queensland, Australia.,Thoracic Programme, The Prince Charles Hospital, Brisbane, Australia
| | - Alan J Knox
- Division of Respiratory Medicine, University of Nottingham, City Hospital Campus, Nottingham, UK.,Nottingham NIHR Biomedical Research Centre, Nottingham MRC Molecular Pathology Node, Nottingham, UK
| | - Paul Williams
- National Biofilms Innovation Centre, University of Nottingham Biodiscovery Institute, School of Life Sciences, University of Nottingham, Nottingham, UK
| | - Andrew Fogarty
- Nottingham NIHR Biomedical Research Centre, Nottingham MRC Molecular Pathology Node, Nottingham, UK.,Division of Epidemiology and Public Health, University of Nottingham, City Hospital Campus, Nottingham, UK
| | - Miguel Cámara
- National Biofilms Innovation Centre, University of Nottingham Biodiscovery Institute, School of Life Sciences, University of Nottingham, Nottingham, UK
| | - Kenneth D Bruce
- Institute of Pharmaceutical Science, King's College London, London, UK.,Nottingham NIHR Biomedical Research Centre, Nottingham MRC Molecular Pathology Node, Nottingham, UK
| | - Helen L Barr
- Wolfson Cystic Fibrosis Centre, Department of Respiratory Medicine, Nottingham University Hospitals NHS Trust, Nottingham, UK.,Nottingham NIHR Biomedical Research Centre, Nottingham MRC Molecular Pathology Node, Nottingham, UK
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17
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Feng W, Qin C, Cipolla E, Lee JB, Zgair A, Chu Y, Ortori CA, Stocks MJ, Constantinescu CS, Barrett DA, Fischer PM, Gershkovich P. Inclusion of Medium-Chain Triglyceride in Lipid-Based Formulation of Cannabidiol Facilitates Micellar Solubilization In Vitro, but In Vivo Performance Remains Superior with Pure Sesame Oil Vehicle. Pharmaceutics 2021; 13:1349. [PMID: 34575426 PMCID: PMC8472830 DOI: 10.3390/pharmaceutics13091349] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 08/21/2021] [Accepted: 08/24/2021] [Indexed: 12/13/2022] Open
Abstract
Oral sesame oil-based formulation facilitates the delivery of poorly water-soluble drug cannabidiol (CBD) to the lymphatic system and blood circulation. However, this natural oil-based formulation also leads to considerable variability in absorption of CBD. In this work, the performance of lipid-based formulations with the addition of medium-chain triglyceride (MCT) or surfactants to the sesame oil vehicle has been tested in vitro and in vivo using CBD as a model drug. The in vitro lipolysis has shown that addition of the MCT leads to a higher distribution of CBD into the micellar phase. Further addition of surfactants to MCT-containing formulations did not improve distribution of the drug into the micellar phase. In vivo, formulations containing MCT led to lower or similar concentrations of CBD in serum, lymph and MLNs, but with reduced variability. MCT improves the emulsification and micellar solubilization of CBD, but surfactants did not facilitate further the rate and extent of lipolysis. Even though addition of MCT reduces the variability, the in vivo performance for the extent of both lymphatic transport and systemic bioavailability remains superior with a pure natural oil vehicle.
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Affiliation(s)
- Wanshan Feng
- School of Pharmacy, University of Nottingham, Nottingham NG7 2RD, UK; (W.F.); (C.Q.); (E.C.); (J.B.L.); (A.Z.); (Y.C.); (C.A.O.); (M.J.S.); (D.A.B.); (P.M.F.)
| | - Chaolong Qin
- School of Pharmacy, University of Nottingham, Nottingham NG7 2RD, UK; (W.F.); (C.Q.); (E.C.); (J.B.L.); (A.Z.); (Y.C.); (C.A.O.); (M.J.S.); (D.A.B.); (P.M.F.)
| | - Elena Cipolla
- School of Pharmacy, University of Nottingham, Nottingham NG7 2RD, UK; (W.F.); (C.Q.); (E.C.); (J.B.L.); (A.Z.); (Y.C.); (C.A.O.); (M.J.S.); (D.A.B.); (P.M.F.)
- School of Pharmacy, Universita di Roma Tor Vergata, 00173 Rome, Italy
| | - Jong Bong Lee
- School of Pharmacy, University of Nottingham, Nottingham NG7 2RD, UK; (W.F.); (C.Q.); (E.C.); (J.B.L.); (A.Z.); (Y.C.); (C.A.O.); (M.J.S.); (D.A.B.); (P.M.F.)
| | - Atheer Zgair
- School of Pharmacy, University of Nottingham, Nottingham NG7 2RD, UK; (W.F.); (C.Q.); (E.C.); (J.B.L.); (A.Z.); (Y.C.); (C.A.O.); (M.J.S.); (D.A.B.); (P.M.F.)
- College of Pharmacy, University of Anbar, Ramadi 31001, Iraq
| | - Yenju Chu
- School of Pharmacy, University of Nottingham, Nottingham NG7 2RD, UK; (W.F.); (C.Q.); (E.C.); (J.B.L.); (A.Z.); (Y.C.); (C.A.O.); (M.J.S.); (D.A.B.); (P.M.F.)
- Tri-Service General Hospital, Medical Supplies and Maintenance Office, National Defense Medical Center, Taipei 114202, Taiwan
| | - Catherine A. Ortori
- School of Pharmacy, University of Nottingham, Nottingham NG7 2RD, UK; (W.F.); (C.Q.); (E.C.); (J.B.L.); (A.Z.); (Y.C.); (C.A.O.); (M.J.S.); (D.A.B.); (P.M.F.)
| | - Michael J. Stocks
- School of Pharmacy, University of Nottingham, Nottingham NG7 2RD, UK; (W.F.); (C.Q.); (E.C.); (J.B.L.); (A.Z.); (Y.C.); (C.A.O.); (M.J.S.); (D.A.B.); (P.M.F.)
| | | | - David A. Barrett
- School of Pharmacy, University of Nottingham, Nottingham NG7 2RD, UK; (W.F.); (C.Q.); (E.C.); (J.B.L.); (A.Z.); (Y.C.); (C.A.O.); (M.J.S.); (D.A.B.); (P.M.F.)
| | - Peter M. Fischer
- School of Pharmacy, University of Nottingham, Nottingham NG7 2RD, UK; (W.F.); (C.Q.); (E.C.); (J.B.L.); (A.Z.); (Y.C.); (C.A.O.); (M.J.S.); (D.A.B.); (P.M.F.)
| | - Pavel Gershkovich
- School of Pharmacy, University of Nottingham, Nottingham NG7 2RD, UK; (W.F.); (C.Q.); (E.C.); (J.B.L.); (A.Z.); (Y.C.); (C.A.O.); (M.J.S.); (D.A.B.); (P.M.F.)
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18
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Safo L, Abdelrazig S, Grosse-Honebrink A, Millat T, Henstra AM, Norman R, Thomas NR, Winzer K, Minton NP, Kim DH, Barrett DA. Quantitative Bioreactor Monitoring of Intracellular Bacterial Metabolites in Clostridium autoethanogenum Using Liquid Chromatography-Isotope Dilution Mass Spectrometry. ACS Omega 2021; 6:13518-13526. [PMID: 34095647 PMCID: PMC8173575 DOI: 10.1021/acsomega.0c05588] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Accepted: 02/03/2021] [Indexed: 05/05/2023]
Abstract
We report a liquid chromatography-isotope dilution mass spectrometry method for the simultaneous quantification of 131 intracellular bacterial metabolites of Clostridium autoethanogenum. A comprehensive mixture of uniformly 13C-labeled internal standards (U-13C IS) was biosynthesized from the closely related bacterium Clostridium pasteurianum using 4% 13C-glucose as a carbon source. The U-13C IS mixture combined with 12C authentic standards was used to validate the linearity, precision, accuracy, repeatability, limits of detection, and quantification for each metabolite. A robust-fitting algorithm was employed to reduce the weight of the outliers on the quantification data. The metabolite calibration curves were linear with R 2 ≥ 0.99, limits of detection were ≤1.0 μM, limits of quantification were ≤10 μM, and precision/accuracy was within RSDs of 15% for all metabolites. The method was subsequently applied for the daily monitoring of the intracellular metabolites of C. autoethanogenum during a CO gas fermentation over 40 days as part of a study to optimize biofuel production. The concentrations of the metabolites were estimated at steady states of different pH levels using the robust-fitting mathematical approach, and we demonstrate improved accuracy of results compared to conventional regression. Metabolic pathway analysis showed that reactions of the incomplete (branched) tricarboxylic acid "cycle" were the most affected pathways associated with the pH shift in the bioreactor fermentation of C. autoethanogenum and the concomitant changes in ethanol production.
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Affiliation(s)
- Laudina Safo
- Centre
for Analytical Bioscience, Advanced Materials and Healthcare Technologies
Division, School of Pharmacy, University
of Nottingham, Nottingham NG7 2RD, U.K.
| | - Salah Abdelrazig
- Centre
for Analytical Bioscience, Advanced Materials and Healthcare Technologies
Division, School of Pharmacy, University
of Nottingham, Nottingham NG7 2RD, U.K.
| | | | - Thomas Millat
- Clostridia
Research Group, BBSRC/EPSCR Synthetic Biology Research Centre (SBRC),
Biodiscovery Institute, School of Life Sciences, University of Nottingham, Nottingham NG7 2RD, U.K.
| | - Anne M. Henstra
- Clostridia
Research Group, BBSRC/EPSCR Synthetic Biology Research Centre (SBRC),
Biodiscovery Institute, School of Life Sciences, University of Nottingham, Nottingham NG7 2RD, U.K.
| | - Rupert Norman
- Clostridia
Research Group, BBSRC/EPSCR Synthetic Biology Research Centre (SBRC),
Biodiscovery Institute, School of Life Sciences, University of Nottingham, Nottingham NG7 2RD, U.K.
| | - Neil R. Thomas
- Biodiscovery
Institute, School of Chemistry, University
of Nottingham, Nottingham NG7 2RD, U.K.
| | - Klaus Winzer
- Clostridia
Research Group, BBSRC/EPSCR Synthetic Biology Research Centre (SBRC),
Biodiscovery Institute, School of Life Sciences, University of Nottingham, Nottingham NG7 2RD, U.K.
| | - Nigel P. Minton
- Clostridia
Research Group, BBSRC/EPSCR Synthetic Biology Research Centre (SBRC),
Biodiscovery Institute, School of Life Sciences, University of Nottingham, Nottingham NG7 2RD, U.K.
| | - Dong-Hyun Kim
- Centre
for Analytical Bioscience, Advanced Materials and Healthcare Technologies
Division, School of Pharmacy, University
of Nottingham, Nottingham NG7 2RD, U.K.
| | - David A. Barrett
- Centre
for Analytical Bioscience, Advanced Materials and Healthcare Technologies
Division, School of Pharmacy, University
of Nottingham, Nottingham NG7 2RD, U.K.
- . Phone: +44(0)115 9515062
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19
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Feng W, Qin C, Chu Y, Berton M, Lee JB, Zgair A, Bettonte S, Stocks MJ, Constantinescu CS, Barrett DA, Fischer PM, Gershkovich P. Natural sesame oil is superior to pre-digested lipid formulations and purified triglycerides in promoting the intestinal lymphatic transport and systemic bioavailability of cannabidiol. Eur J Pharm Biopharm 2021; 162:43-49. [PMID: 33677067 DOI: 10.1016/j.ejpb.2021.02.013] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2020] [Revised: 01/19/2021] [Accepted: 02/26/2021] [Indexed: 11/19/2022]
Abstract
Lipid-based formulations play a significant role in oral delivery of lipophilic drugs. Previous studies have shown that natural sesame oil promotes the intestinal lymphatic transport and oral bioavailability of the highly lipophilic drug cannabidiol (CBD). However, both lymphatic transport and systemic bioavailability were also associated with considerable variability. The aim of this study was to test the hypothesis that pre-digested lipid formulations (oleic acid, linoleic acid, oleic acid with 2-oleoylglycerol, oleic acid with 2-oleoylglycerol and oleic acid with glycerol) could reduce variability and increase the extent of the intestinal lymphatic transport and oral bioavailability of CBD. The in vivo studies in rats showed that pre-digested or purified triglyceride did not improve the lymphatic transport and bioavailability of CBD in comparison to sesame oil. Moreover, the results suggest that both the absorption of lipids and the absorption of co-administered CBD were more efficient following administration of natural sesame oil vehicle compared with pre-digested lipids or purified trioleate. Although multiple small molecule constituents and unique fatty acid compositions could potentially contribute to a better performance of sesame oil in oral absorption of lipids or CBD, further investigation will be needed to identify the mechanisms involved.
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Affiliation(s)
- Wanshan Feng
- School of Pharmacy, University of Nottingham, Nottingham NG7 2RD, UK
| | - Chaolong Qin
- School of Pharmacy, University of Nottingham, Nottingham NG7 2RD, UK
| | - YenJu Chu
- School of Pharmacy, University of Nottingham, Nottingham NG7 2RD, UK; Tri-Service General Hospital, Medical Supplies and Maintenance Office, National Defense Medical Center, Taipei, Taiwan
| | - Mattia Berton
- School of Pharmacy, University of Nottingham, Nottingham NG7 2RD, UK
| | - Jong Bong Lee
- School of Pharmacy, University of Nottingham, Nottingham NG7 2RD, UK
| | - Atheer Zgair
- School of Pharmacy, University of Nottingham, Nottingham NG7 2RD, UK; College of Pharmacy, University of Anbar, Ramadi, Anbar 31001, Iraq
| | - Sara Bettonte
- School of Pharmacy, University of Nottingham, Nottingham NG7 2RD, UK
| | - Michael J Stocks
- School of Pharmacy, University of Nottingham, Nottingham NG7 2RD, UK
| | - Cris S Constantinescu
- Division of Clinical Neuroscience, University of Nottingham and Queen's Medical Centre, Nottingham NG7 2UH, UK
| | - David A Barrett
- School of Pharmacy, University of Nottingham, Nottingham NG7 2RD, UK
| | - Peter M Fischer
- School of Pharmacy, University of Nottingham, Nottingham NG7 2RD, UK
| | - Pavel Gershkovich
- School of Pharmacy, University of Nottingham, Nottingham NG7 2RD, UK.
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20
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Abdelrazig S, Ortori CA, Doherty M, Valdes AM, Chapman V, Barrett DA. Metabolic signatures of osteoarthritis in urine using liquid chromatography-high resolution tandem mass spectrometry. Metabolomics 2021; 17:29. [PMID: 33655418 PMCID: PMC7925472 DOI: 10.1007/s11306-021-01778-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Accepted: 02/09/2021] [Indexed: 01/21/2023]
Abstract
INTRODUCTION Osteoarthritis (OA) is a common cause of disability in older people, but its aetiology is not yet fully understood. Biomarkers of OA from metabolomics studies have shown potential use in understanding the progression and pathophysiology of OA. OBJECTIVES To investigate possible surrogate biomarkers of knee OA in urine using metabolomics to contribute towards a better understanding of OA progression and possible targeted treatment. METHOD Liquid chromatography-high resolution mass spectrometry (LC-HRMS) was applied in a case-control approach to explore the possible metabolic differences between the urinary profiles of symptomatic knee OA patients (n = 74) (subclassified into inflammatory OA, n = 22 and non-inflammatory OA, n = 52) and non-OA controls (n = 68). Univariate, multivariate and pathway analyses were performed with a rigorous validation including cross-validation, permutation test, prediction and receiver operating characteristic curve to identify significantly altered metabolites and pathways in OA. RESULTS OA datasets generated 7405 variables and multivariate analysis showed clear separation of inflammatory OA, but not non-inflammatory OA, from non-OA controls. Adequate cross-validation (R2Y = 0.874, Q2 = 0.465) was obtained. The prediction model and the ROC curve showed satisfactory results with a sensitivity of 88%, specificity of 71% and accuracy of 77%. 26 metabolites were identified as potential biomarkers of inflammatory OA using HMDB, authentic standards and/or MS/MS database. CONCLUSION Urinary metabolic profiles were altered in inflammatory knee OA subjects compared to those with non-inflammatory OA and non-OA controls. These altered profiles associated with perturbed activity of the TCA cycle, pyruvate and amino acid metabolism linked to inflammation, oxidative stress and collagen destruction. Of note, 2-keto-glutaramic acid level was > eightfold higher in the inflammatory OA patients compared to non-OA control, signalling a possible perturbation in glutamine metabolism related to OA progression.
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Affiliation(s)
- Salah Abdelrazig
- Centre for Analytical Bioscience, Advanced Materials and Healthcare Technologies Division, School of Pharmacy, University of Nottingham, Nottingham, NG7 2RD, UK
| | - Catharine A Ortori
- Centre for Analytical Bioscience, Advanced Materials and Healthcare Technologies Division, School of Pharmacy, University of Nottingham, Nottingham, NG7 2RD, UK
| | - Michael Doherty
- Pain Centre Versus Arthritis, Queen's, Medical Centre, Medical School, University of Nottingham, Nottingham, NG7 2RD, UK
- School of Medicine, University of Nottingham, Nottingham, NG7 2RD, UK
- NIHR Nottingham Biomedical Research Centre, University of Nottingham, Nottingham, NG7 2RD, UK
- Centre for Sport, Exercise and Osteoarthritis Research Versus Arthritis, University of Nottingham, Nottingham, NG7 2RD, UK
| | - Ana M Valdes
- Pain Centre Versus Arthritis, Queen's, Medical Centre, Medical School, University of Nottingham, Nottingham, NG7 2RD, UK
- School of Medicine, University of Nottingham, Nottingham, NG7 2RD, UK
| | - Victoria Chapman
- Pain Centre Versus Arthritis, Queen's, Medical Centre, Medical School, University of Nottingham, Nottingham, NG7 2RD, UK
- NIHR Nottingham Biomedical Research Centre, University of Nottingham, Nottingham, NG7 2RD, UK
- School of Life Sciences, University of Nottingham, Nottingham, NG7 2RD, UK
| | - David A Barrett
- Centre for Analytical Bioscience, Advanced Materials and Healthcare Technologies Division, School of Pharmacy, University of Nottingham, Nottingham, NG7 2RD, UK.
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21
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Tomi-Andrino C, Norman R, Millat T, Soucaille P, Winzer K, Barrett DA, King J, Kim DH. Physicochemical and metabolic constraints for thermodynamics-based stoichiometric modelling under mesophilic growth conditions. PLoS Comput Biol 2021; 17:e1007694. [PMID: 33493151 PMCID: PMC7861524 DOI: 10.1371/journal.pcbi.1007694] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Revised: 02/04/2021] [Accepted: 12/28/2020] [Indexed: 12/11/2022] Open
Abstract
Metabolic engineering in the post-genomic era is characterised by the development of new methods for metabolomics and fluxomics, supported by the integration of genetic engineering tools and mathematical modelling. Particularly, constraint-based stoichiometric models have been widely studied: (i) flux balance analysis (FBA) (in silico), and (ii) metabolic flux analysis (MFA) (in vivo). Recent studies have enabled the incorporation of thermodynamics and metabolomics data to improve the predictive capabilities of these approaches. However, an in-depth comparison and evaluation of these methods is lacking. This study presents a thorough analysis of two different in silico methods tested against experimental data (metabolomics and 13C-MFA) for the mesophile Escherichia coli. In particular, a modified version of the recently published matTFA toolbox was created, providing a broader range of physicochemical parameters. Validating against experimental data allowed the determination of the best physicochemical parameters to perform the TFA (Thermodynamics-based Flux Analysis). An analysis of flux pattern changes in the central carbon metabolism between 13C-MFA and TFA highlighted the limited capabilities of both approaches for elucidating the anaplerotic fluxes. In addition, a method based on centrality measures was suggested to identify important metabolites that (if quantified) would allow to further constrain the TFA. Finally, this study emphasised the need for standardisation in the fluxomics community: novel approaches are frequently released but a thorough comparison with currently accepted methods is not always performed. Biotechnology has benefitted from the development of high throughput methods characterising living systems at different levels (e.g. concerning genes or proteins), allowing the industrial production of chemical commodities. Recently, focus has been placed on determining reaction rates (or metabolic fluxes) in the metabolic network of certain microorganisms, in order to identify bottlenecks hindering their exploitation. Two main approaches are commonly used, termed metabolic flux analysis (MFA) and flux balance analysis (FBA), based on measuring and estimating fluxes, respectively. While the influence of thermodynamics in living systems was accepted several decades ago, its application to study biochemical networks has only recently been enabled. In this sense, a multitude of different approaches constraining well-established modelling methods with thermodynamics has been suggested. However, physicochemical parameters are generally not properly adjusted to the experimental conditions, which might affect their predictive capabilities. In this study, we have explored the reliability of currently available tools by investigating the impact of varying said parameters in the simulation of metabolic fluxes and metabolite concentration values. Additionally, our in-depth analysis allowed us to highlight limitations and potential solutions that should be considered in future studies.
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Affiliation(s)
- Claudio Tomi-Andrino
- Centre for Analytical Bioscience, Advanced Materials and Healthcare Technologies Division, School of Pharmacy, University of Nottingham, Nottingham, United Kingdom
- Nottingham BBSRC/EPSRC Synthetic Biology Research Centre (SBRC), School of Life Sciences, BioDiscovery Institute, University of Nottingham, Nottingham, United Kingdom
- Nottingham BBSRC/EPSRC Synthetic Biology Research Centre (SBRC), School of Mathematical Sciences, University of Nottingham, Nottingham, United Kingdom
| | - Rupert Norman
- Nottingham BBSRC/EPSRC Synthetic Biology Research Centre (SBRC), School of Life Sciences, BioDiscovery Institute, University of Nottingham, Nottingham, United Kingdom
| | - Thomas Millat
- Nottingham BBSRC/EPSRC Synthetic Biology Research Centre (SBRC), School of Life Sciences, BioDiscovery Institute, University of Nottingham, Nottingham, United Kingdom
| | - Philippe Soucaille
- Nottingham BBSRC/EPSRC Synthetic Biology Research Centre (SBRC), School of Life Sciences, BioDiscovery Institute, University of Nottingham, Nottingham, United Kingdom
- INSA, UPS, INP, Toulouse Biotechnology Institute, (TBI), Université de Toulouse, Toulouse, France
- INRA, UMR792, Toulouse, France
- CNRS, UMR5504, Toulouse, France
| | - Klaus Winzer
- Nottingham BBSRC/EPSRC Synthetic Biology Research Centre (SBRC), School of Life Sciences, BioDiscovery Institute, University of Nottingham, Nottingham, United Kingdom
| | - David A. Barrett
- Centre for Analytical Bioscience, Advanced Materials and Healthcare Technologies Division, School of Pharmacy, University of Nottingham, Nottingham, United Kingdom
| | - John King
- Nottingham BBSRC/EPSRC Synthetic Biology Research Centre (SBRC), School of Mathematical Sciences, University of Nottingham, Nottingham, United Kingdom
| | - Dong-Hyun Kim
- Centre for Analytical Bioscience, Advanced Materials and Healthcare Technologies Division, School of Pharmacy, University of Nottingham, Nottingham, United Kingdom
- * E-mail:
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22
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Pandele A, Woodward A, MacArthur D, Kamaly-Asl I, Barrett DA, Grundy RG, Kim DH, Rahman R. EPEN-43. TARGETING INTRA-TUMOUR HETEROGENEITY IN PAEDIATRIC EPENDYMOMA: AN INTEGRATED OMICS STUDY TOWARDS PATIENT-TAILORED THERAPY. Neuro Oncol 2020. [PMCID: PMC7715236 DOI: 10.1093/neuonc/noaa222.177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Ependymoma (EPN) is the second most common malignant paediatric brain tumour, which despite extensive genomic sequencing, no novel therapeutic options have been discovered. Multi-omics are anticipated to reveal dysregulated pathways that may be predictive of patient-specific biomarkers. Given the close association between gene expression, active biochemical signaling and metabolism, there is an unmet scientific challenge to determine whether EPN gene expression correlates with aberrant metabolic pathways, thus presenting therapeutic vulnerabilities. We first compared two distinct subgroups of EPN, PF-A and ST-RELA, identifying 115 metabolites and 1580 upregulated genes between the two subgroups, therefore validating previously reported genetic clustering of these two subtypes. We next integrated transcriptomics and metabolomics, comparing 28 intra-tumour tissue regions from eight primary PF-A EPN patients. Polar metabolites and RNA were simultaneously extracted from the same population of cells. RNAseq identified dysregulated genes and liquid chromatography-mass spectrometry (LC-MS) detected 98 significantly altered metabolites between 18 multi-regions, the majority mapping onto the arginine and proline pathways. Integration of genes and metabolites using pathway-based network analysis revealed 124 aberrant gene-metabolite interactions between intra-tumour regions, with large numbers occurring in the glucogenesis and glycine metabolic pathways in 6/8 patients. These may represent ubiquitous and therapeutically relevant metabolic pathways critical for EPN survival. Additionally, patients presented at least one unique intra-tumour genomic-metabolomic interaction, applicable for patient-tailored therapy. This is the first exploration of EPN multi-omic integration and intra-tumour heterogeneity. Selected drug targets predicated on aberrant gene-metabolite networks will be validated in multi-region patient-derived cell lines and orthotopic models using repurposed therapeutics.
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Affiliation(s)
- Alina Pandele
- Children’s Brain Tumour Research Centre, School of Medicine, The University of Nottingham, Biodiscovery Institute, Nottingham, United Kingdom
| | - Alison Woodward
- Children’s Brain Tumour Research Centre, School of Medicine, The University of Nottingham, Biodiscovery Institute, Nottingham, United Kingdom
| | - Donald MacArthur
- Department of Neurosurgery, Nottingham University Hospitals NHS Trust, Nottingham, United Kingdom
| | - Ian Kamaly-Asl
- Royal Manchester Children’s Hospital, Manchester, United Kingdom
| | - David A Barrett
- Centre for Analytical Bioscience, Advanced Materials and Healthcare Technologies, School of Pharmacy, The University of Nottingham, Nottingham, United Kingdom
| | - Richard G Grundy
- Children’s Brain Tumour Research Centre, School of Medicine, The University of Nottingham, Biodiscovery Institute, Nottingham, United Kingdom
| | - Dong-Hyun Kim
- Centre for Analytical Bioscience, Advanced Materials and Healthcare Technologies, School of Pharmacy, The University of Nottingham, Nottingham, United Kingdom
| | - Ruman Rahman
- Children’s Brain Tumour Research Centre, School of Medicine, The University of Nottingham, Biodiscovery Institute, Nottingham, United Kingdom
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Ingram TL, Shephard F, Sarmad S, Ortori CA, Barrett DA, Chakrabarti L. Sex specific inflammatory profiles of cerebellar mitochondria are attenuated in Parkinson's disease. Aging (Albany NY) 2020; 12:17713-17737. [PMID: 32855358 PMCID: PMC7521528 DOI: 10.18632/aging.103937] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Accepted: 08/01/2020] [Indexed: 01/24/2023]
Abstract
Response to inflammation is a key determinant in many diseases and their outcomes. Diseases that commonly affect older people are frequently associated with altered inflammatory processes. Neuroinflammation has been described in Parkinson's disease (PD) brain. PD is characterized by the loss of dopaminergic neurons in the substantia nigra pars compacta and at the sub-cellular level, mitochondrial dysfunction is a key feature. However, there is evidence that a different region of the brain, the cerebellum, is involved in the pathophysiology of PD. We report relative levels of 40 pro- and anti-inflammatory cytokines measured in PD and control cerebellar mitochondria. These data were obtained by screening cytokine antibody arrays. In parallel, we present concentrations of 29 oxylipins and 4 endocannabinoids measured in mitochondrial fractions isolated from post-mortem PD cerebellum with age and sex matched controls. Our oxylipin and endocannabinoid data were acquired via quantitation by LC-ESI-MS/MS. The separate sample sets both show there are clearly different inflammatory profiles between the sexes in control samples. Sex specific profiles were not maintained in cerebellar mitochondria isolated from PD brains.
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Affiliation(s)
- Thomas L. Ingram
- School of Veterinary Medicine and Science, University of Nottingham, Sutton Bonington, UK
| | - Freya Shephard
- School of Veterinary Medicine and Science, University of Nottingham, Sutton Bonington, UK
| | - Sarir Sarmad
- Centre for Analytical Bioscience, Advanced Materials and Healthcare Technologies Division, School of Pharmacy, University of Nottingham, Nottingham, UK
| | - Catherine A. Ortori
- Centre for Analytical Bioscience, Advanced Materials and Healthcare Technologies Division, School of Pharmacy, University of Nottingham, Nottingham, UK
| | - David A. Barrett
- Centre for Analytical Bioscience, Advanced Materials and Healthcare Technologies Division, School of Pharmacy, University of Nottingham, Nottingham, UK
| | - Lisa Chakrabarti
- School of Veterinary Medicine and Science, University of Nottingham, Sutton Bonington, UK
- MRC Versus Arthritis Centre for Musculoskeletal Ageing Research, UK
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Furner-Pardoe J, Anonye BO, Cain R, Moat J, Ortori CA, Lee C, Barrett DA, Corre C, Harrison F. Anti-biofilm efficacy of a medieval treatment for bacterial infection requires the combination of multiple ingredients. Sci Rep 2020; 10:12687. [PMID: 32724094 PMCID: PMC7387442 DOI: 10.1038/s41598-020-69273-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Accepted: 06/16/2020] [Indexed: 11/12/2022] Open
Abstract
Novel antimicrobials are urgently needed to combat drug-resistant bacteria and to overcome the inherent difficulties in treating biofilm-associated infections. Studying plants and other natural materials used in historical infection remedies may enable further discoveries to help fill the antibiotic discovery gap. We previously reconstructed a 1,000-year-old remedy containing onion, garlic, wine, and bile salts, known as 'Bald's eyesalve', and showed it had promising antibacterial activity. In this current paper, we have found this bactericidal activity extends to a range of Gram-negative and Gram-positive wound pathogens in planktonic culture and, crucially, that this activity is maintained against Acinetobacter baumannii, Stenotrophomonas maltophilia, Staphylococcus aureus, Staphylococcus epidermidis and Streptococcus pyogenes in a soft-tissue wound biofilm model. While the presence of garlic in the mixture can explain the activity against planktonic cultures, garlic has no activity against biofilms. We have found the potent anti-biofilm activity of Bald's eyesalve cannot be attributed to a single ingredient and requires the combination of all ingredients to achieve full activity. Our work highlights the need to explore not only single compounds but also mixtures of natural products for treating biofilm infections and underlines the importance of working with biofilm models when exploring natural products for the anti-biofilm pipeline.
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Affiliation(s)
- Jessica Furner-Pardoe
- School of Life Sciences, Gibbet Hill Campus, University of Warwick, Coventry, CV4 7AL, UK.
- Warwick Medical School, Gibbet Hill Campus, University of Warwick, Coventry, CV4 7AL, UK.
| | - Blessing O Anonye
- School of Life Sciences, Gibbet Hill Campus, University of Warwick, Coventry, CV4 7AL, UK
- School of Medicine, University of Central Lancashire, Preston, PR1 2HE, UK
| | - Ricky Cain
- School of Life Sciences, Gibbet Hill Campus, University of Warwick, Coventry, CV4 7AL, UK
- Evotec (U.K.) Ltd, 114 Innovation Drive, Milton Park, Abingdon, OX14 4RZ, Oxfordshire, UK
| | - John Moat
- Warwick Antimicrobial Screening Facility, School of Life Sciences, Gibbet Hill Campus, University of Warwick, Coventry, CV4 7AL, UK
| | - Catherine A Ortori
- Centre for Analytical Bioscience, Advanced Materials and Healthcare Technologies Division, School of Pharmacy, University of Nottingham, Nottingham, NG7 2RD, UK
| | - Christina Lee
- School of English, University of Nottingham, Nottingham, NG7 2RD, UK
| | - David A Barrett
- Centre for Analytical Bioscience, Advanced Materials and Healthcare Technologies Division, School of Pharmacy, University of Nottingham, Nottingham, NG7 2RD, UK
| | - Christophe Corre
- School of Life Sciences, Gibbet Hill Campus, University of Warwick, Coventry, CV4 7AL, UK
- Department of Chemistry, University of Warwick, Coventry, CV4 7AL, UK
| | - Freya Harrison
- School of Life Sciences, Gibbet Hill Campus, University of Warwick, Coventry, CV4 7AL, UK.
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Hammond S, Wignell A, Cooling P, Barrett DA, Davies P. Plasma-Lyte 148 and Plasma-Lyte 148 + 5% glucose compatibility with commonly used critical care drugs. Intensive Care Med Exp 2020; 8:25. [PMID: 32577941 PMCID: PMC7311557 DOI: 10.1186/s40635-020-00311-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2019] [Accepted: 05/26/2020] [Indexed: 01/02/2023] Open
Abstract
PURPOSE Plasma-Lyte is a balanced, crystalloid intravenous fluid which has been shown to avoid the hyperchloremic metabolic acidosis associated with 0.9% sodium chloride. Data on physical, pH and chemical compatibility with other medicines are essential. METHODS The compatibility of adrenaline, dobutamine, dopamine, furosemide, midazolam, morphine and milrinone with Plasma-Lyte 148 (PLA) and Plasma-Lyte 148 with 5% glucose (PLA-G) was investigated. Control solutions were 0.9% sodium chloride and 5% glucose. Chemical stability was defined as < 5% concentration change with high-performance liquid chromatography (HPLC). Physical compatibility was assessed by checking for colour changes and precipitate formation. The pH of the admixtures was considered acceptable if between 5 and 9 at all time points. Six repeats were carried out for HPLC, 2 for physical compatibility checks and pH measurements, with all admixtures being tested at 0, 2 and 24 h after mixing. RESULTS All combinations were found to be chemically stable at 0, 2 and 24 h apart from furosemide with PLA-G at 24 h and midazolam with PLA or PLA-G at both 2 and 24 h. Only midazolam was physically incompatible when mixed with both Plasma-Lyte solutions. The pH remained stable in all admixtures, although not all pH values recorded were within the range of 5-9. CONCLUSION All drugs excluding furosemide and midazolam were shown to be chemically, physically and pH stable at the tested concentrations when diluted with PLA and PLA-G.
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Affiliation(s)
- Sophie Hammond
- School of Medicine, University of Nottingham, Nottingham, UK
- Paediatric Critical Care Unit, Nottingham Children's Hospital, Derby Road, Nottingham, UK
| | - Andrew Wignell
- Paediatric Critical Care Unit, Nottingham Children's Hospital, Derby Road, Nottingham, UK
- Pharmacy Department, Nottingham University Hospitals NHS Trust, Nottingham, UK
| | - Paul Cooling
- Division of Advanced Materials and Healthcare Technologies, School of Pharmacy, University of Nottingham, Nottingham, UK
| | - David A Barrett
- Division of Advanced Materials and Healthcare Technologies, School of Pharmacy, University of Nottingham, Nottingham, UK
| | - Patrick Davies
- School of Medicine, University of Nottingham, Nottingham, UK.
- Paediatric Critical Care Unit, Nottingham Children's Hospital, Derby Road, Nottingham, UK.
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26
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Tsintzas K, Jones R, Pabla P, Mallinson J, Barrett DA, Kim DH, Cooper S, Davies A, Taylor T, Chee C, Gaffney C, van Loon LJC, Stephens FB. Effect of acute and short-term dietary fat ingestion on postprandial skeletal muscle protein synthesis rates in middle-aged, overweight, and obese men. Am J Physiol Endocrinol Metab 2020; 318:E417-E429. [PMID: 31910028 DOI: 10.1152/ajpendo.00344.2019] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Muscle anabolic resistance to dietary protein is associated with obesity and insulin resistance. However, the contribution of excess consumption of fat to anabolic resistance is not well studied. The aim of these studies was to test the hypothesis that acute and short-term dietary fat overload will impair the skeletal muscle protein synthetic response to dietary protein ingestion. Eight overweight/obese men [46.4 ± 1.4 yr, body mass index (BMI) 32.3 ± 5.4 kg/m2] participated in the acute feeding study, which consisted of two randomized crossover trials. On each occasion, subjects ingested an oral meal (with and without fat emulsion), 4 h before the coingestion of milk protein, intrinsically labeled with [1-13C]phenylalanine, and dextrose. Nine overweight/obese men (44.0 ± 1.7 yr, BMI 30.1 ± 1.1 kg/m2) participated in the chronic study, which consisted of a baseline, 1-wk isocaloric diet, followed by a 2-wk high-fat diet (+25% energy excess). Acutely, incorporation of dietary amino acids into the skeletal muscle was twofold higher (P < 0.05) in the lipid trial compared with control. There was no effect of prior lipid ingestion on indices of insulin sensitivity (muscle glucose uptake, pyruvate dehydrogenase complex activity, and Akt phosphorylation) in response to the protein/dextrose drink. Fat overfeeding had no effect on muscle protein synthesis or glucose disposal in response to whey protein ingestion, despite increased muscle diacylglycerol C16:0 (P = 0.06) and ceramide C16:0 (P < 0.01) levels. Neither acute nor short-term dietary fat overload has a detrimental effect on the skeletal muscle protein synthetic response to dietary protein ingestion in overweight/obese men, suggesting that dietary-induced accumulation of intramuscular lipids per se is not associated with anabolic resistance.
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Affiliation(s)
- Kostas Tsintzas
- MRC/Versus Arthritis Centre for Musculoskeletal Ageing Research, School of Life Sciences, University of Nottingham, United Kingdom
| | - Robert Jones
- MRC/Versus Arthritis Centre for Musculoskeletal Ageing Research, School of Life Sciences, University of Nottingham, United Kingdom
| | - Pardeep Pabla
- MRC/Versus Arthritis Centre for Musculoskeletal Ageing Research, School of Life Sciences, University of Nottingham, United Kingdom
| | - Joanne Mallinson
- MRC/Versus Arthritis Centre for Musculoskeletal Ageing Research, School of Life Sciences, University of Nottingham, United Kingdom
| | - David A Barrett
- Centre for Analytical Bioscience, Advanced Materials and Healthcare Technologies Division, School of Pharmacy, University of Nottingham, Nottingham, United Kingdom
| | - Dong-Hyun Kim
- Centre for Analytical Bioscience, Advanced Materials and Healthcare Technologies Division, School of Pharmacy, University of Nottingham, Nottingham, United Kingdom
| | - Scott Cooper
- MRC/Versus Arthritis Centre for Musculoskeletal Ageing Research, School of Life Sciences, University of Nottingham, United Kingdom
| | - Amanda Davies
- MRC/Versus Arthritis Centre for Musculoskeletal Ageing Research, School of Life Sciences, University of Nottingham, United Kingdom
| | - Tariq Taylor
- MRC/Versus Arthritis Centre for Musculoskeletal Ageing Research, School of Life Sciences, University of Nottingham, United Kingdom
| | - Carolyn Chee
- MRC/Versus Arthritis Centre for Musculoskeletal Ageing Research, School of Life Sciences, University of Nottingham, United Kingdom
| | - Christopher Gaffney
- MRC/Versus Arthritis Centre for Musculoskeletal Ageing Research, School of Life Sciences, University of Nottingham, United Kingdom
| | - Luc J C van Loon
- Department of Human Movement Sciences, Maastricht University, Maastricht, The Netherlands
| | - Francis B Stephens
- School of Sport and Health Sciences, University of Exeter, Exeter, United Kingdom
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Pousinis P, Gowler PRW, Burston JJ, Ortori CA, Chapman V, Barrett DA. Lipidomic identification of plasma lipids associated with pain behaviour and pathology in a mouse model of osteoarthritis. Metabolomics 2020; 16:32. [PMID: 32108917 PMCID: PMC7046574 DOI: 10.1007/s11306-020-01652-8] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Accepted: 02/19/2020] [Indexed: 12/22/2022]
Abstract
INTRODUCTION Osteoarthritis (OA) is the most common form of joint disease, causing pain and disability. Previous studies have demonstrated the role of lipid mediators in OA pathogenesis. OBJECTIVES To explore potential alterations in the plasma lipidomic profile in an established mouse model of OA, with a view to identification of potential biomarkers of pain and/or pathology. METHODS Pain behaviour was assessed following destabilisation of the medial meniscus (DMM) model of OA (n = 8 mice) and compared to sham controls (n = 7). Plasma and knee joints were collected at 16 weeks post-surgery. Plasma samples were analysed using ultra-high performance liquid chromatography accurate mass high resolution mass spectrometry (UHPLC-HR-MS) to identify potential differences in the lipidome, using multivariate and univariate statistical analyses. Correlations between pain behaviour, joint pathology and levels of lipids were investigated. RESULTS 24 lipids, predominantly from the lipid classes of cholesterol esters (CE), fatty acids (FA), phosphatidylcholines (PC), N-acylethanolamines (NAE) and sphingomyelins (SM), were differentially expressed in DMM plasma compared to sham plasma. Six of these lipids which were increased in the DMM model were identified as CE(18:2), CE(20:4), CE(22:6), PC(18:0/18:2), PC(38:7) and SM(d34:1). CEs were positively correlated with pain behaviour and all six lipid species were positively correlated with cartilage damage. Pathways shown to be involved in altered lipid homeostasis in OA were steroid biosynthesis and sphingolipid metabolism. CONCLUSION We identify plasma lipid species associated with pain and/or pathology in a DMM model of OA.
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Affiliation(s)
- P Pousinis
- Centre for Analytical Bioscience, Advanced Materials and Healthcare Technology Division, School of Pharmacy, University of Nottingham, Nottingham, UK
| | - P R W Gowler
- Pain Centre Versus Arthritis, University of Nottingham, Nottingham, UK
- School of Life Sciences, University of Nottingham, Nottingham, UK
| | - J J Burston
- Pain Centre Versus Arthritis, University of Nottingham, Nottingham, UK
- School of Life Sciences, University of Nottingham, Nottingham, UK
| | - C A Ortori
- Centre for Analytical Bioscience, Advanced Materials and Healthcare Technology Division, School of Pharmacy, University of Nottingham, Nottingham, UK
| | - V Chapman
- Pain Centre Versus Arthritis, University of Nottingham, Nottingham, UK.
- School of Life Sciences, University of Nottingham, Nottingham, UK.
| | - D A Barrett
- Centre for Analytical Bioscience, Advanced Materials and Healthcare Technology Division, School of Pharmacy, University of Nottingham, Nottingham, UK
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28
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Dahabiyeh LA, Tooth D, Kurlak LO, Mistry HD, Pipkin FB, Barrett DA. A pilot study of alterations in oxidized angiotensinogen and antioxidants in pre-eclamptic pregnancy. Sci Rep 2020; 10:1956. [PMID: 32029819 PMCID: PMC7004983 DOI: 10.1038/s41598-020-58930-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2019] [Accepted: 01/20/2020] [Indexed: 11/09/2022] Open
Abstract
The oxidation status of angiotensinogen (AGT) may have a critical role in pre-eclampsia. We used a validated, quantitative, mass spectrometry-based method to measure the oxidized and total AGT levels in plasma of pre-eclamptic women (n = 17), normotensive-matched controls (n = 17), and healthy non-pregnant women (n = 10). Measurements of plasma glutathione peroxidase (GPx) activity and serum selenium concentrations were performed as markers of circulating antioxidant capacity. Higher proportions of oxidized AGT in plasma from pre-eclamptic women compared to matched normotensive pregnant controls (P = 0.006), whilst maintaining a similar total plasma AGT concentration were found. In the pre-eclamptic group, blood pressure were correlated with the proportion of oxidized AGT; no such correlation was seen in the normotensive pregnant women. Plasma GPx was inversely correlated with oxidized AGT, and there was an inverse association between serum selenium concentration and the proportion of oxidized AGT. This is the first time that oxidized AGT in human plasma has been linked directly to antioxidant status, providing a mechanism for the enhanced oxidative stress in pre-eclampsia. We now provide pathophysiological evidence that the conversion of the reduced form of AGT to its more active oxidized form is associated with inadequate antioxidant status and could indeed contribute to the hypertension of pre-eclampsia.
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Affiliation(s)
- Lina A Dahabiyeh
- Department of Pharmaceutical Sciences, School of Pharmacy, The University of Jordan, Amman, Jordan.,Centre for Analytical Bioscience, Division of Advanced Materials and Healthcare Technologies, School of Pharmacy, University of Nottingham, Nottingham, UK
| | - David Tooth
- BBSRC/EPSRC Synthetic Biology Research Centre, School of Life Sciences, University of Nottingham, Nottingham, UK
| | - Lesia O Kurlak
- Division of Child Health, Obstetrics and Gynaecology, School of Medicine; University of Nottingham, Nottingham, UK
| | - Hiten D Mistry
- Division of Child Health, Obstetrics and Gynaecology, School of Medicine; University of Nottingham, Nottingham, UK.
| | - Fiona Broughton Pipkin
- Division of Child Health, Obstetrics and Gynaecology, School of Medicine; University of Nottingham, Nottingham, UK
| | - David A Barrett
- Centre for Analytical Bioscience, Division of Advanced Materials and Healthcare Technologies, School of Pharmacy, University of Nottingham, Nottingham, UK
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29
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Webb K, Fogarty A, Barrett DA, Nash EF, Whitehouse JL, Smyth AR, Stewart I, Knox A, Williams P, Halliday N, Cámara M, Barr HL. Clinical significance of Pseudomonas aeruginosa 2-alkyl-4-quinolone quorum-sensing signal molecules for long-term outcomes in adults with cystic fibrosis. J Med Microbiol 2019; 68:1823-1828. [PMID: 31671047 DOI: 10.1099/jmm.0.001099] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Introduction. Pseudomonas aeruginosa is an important respiratory pathogen in cystic fibrosis (CF), which is associated with an accelerated decline in lung function, frequent pulmonary exacerbations and increased mortality. P. aeruginosa produces intercellular signalling molecules including 2-alkyl-4-quinolones (AQs), which regulate virulence-factor production and biofilm formation in the CF airways. Studies have shown that AQs are detectable in the sputum and plasma of adults with CF and chronic pulmonary P. aeruginosa.Aim. We tested the hypothesis that the presence of six AQs in plasma or sputum obtained from adults with CF was associated with long-term adverse clinical outcomes.Methodology. We analysed clinical data over an 8 year follow period for 90 people with CF who had previously provided samples for AQ analysis at clinical stability. The primary outcome was all cause mortality or lung transplantation. Secondary outcomes were the rate of lung-function decline and the number of intravenous (IV) antibiotic days for pulmonary exacerbations.Results. There was no statistical association between the presence of any of the six measured AQs and the primary outcomes or the secondary outcome of decline in lung function. One of the six AQs was associated with IV antibiotic usage. The presence of 2-nonyl-3-hydroxy-4(1 h)-quinolone (C9-PQS) in sputum was associated with an increase in the number of IV antibiotic days in the follow-up period (Mann-Whitney; P=0.011).Conclusion. Further investigation to confirm the hypothesis that C9-PQS may be associated with increased antibiotic usage for pulmonary exacerbations is warranted as AQ-dependent signalling is a potential future target for anti-virulence therapies.
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Affiliation(s)
- Karmel Webb
- Division of Epidemiology and Public Health, University of Nottingham, City Hospital Campus, Nottingham, UK
| | - Andrew Fogarty
- Division of Epidemiology and Public Health, University of Nottingham, City Hospital Campus, Nottingham, UK
| | - David A Barrett
- Centre for Analytical Bioscience, Division of Advanced Materials and Healthcare Technologies, School of Pharmacy, University of Nottingham, Nottingham, UK
| | - Edward F Nash
- West Midlands Adult CF Centre, University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK
| | - Joanna L Whitehouse
- West Midlands Adult CF Centre, University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK
| | - Alan R Smyth
- Division of Child Health, Obstetrics and Gynaecology, University of Nottingham, Nottingham, UK
| | - Iain Stewart
- Division of Respiratory Medicine, University of Nottingham, City Hospital Campus, Nottingham, UK
| | - Alan Knox
- Division of Respiratory Medicine, University of Nottingham, City Hospital Campus, Nottingham, UK
| | - Paul Williams
- National Biofilms Innovation Centre, Centre for Biomolecular Sciences, School of Life Sciences, University of Nottingham, Nottingham, UK
| | - Nigel Halliday
- National Biofilms Innovation Centre, Centre for Biomolecular Sciences, School of Life Sciences, University of Nottingham, Nottingham, UK
| | - Miguel Cámara
- National Biofilms Innovation Centre, Centre for Biomolecular Sciences, School of Life Sciences, University of Nottingham, Nottingham, UK
| | - Helen L Barr
- Wolfson Cystic Fibrosis Centre, Department of Respiratory Medicine, Nottingham University Hospitals NHS Trust, Nottingham, UK
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30
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Sander KN, Kim DH, Ortori CA, Warren AY, Anyanwagu UC, Hay DP, Broughton Pipkin F, Khan RN, Barrett DA. Untargeted analysis of plasma samples from pre-eclamptic women reveals polar and apolar changes in the metabolome. Metabolomics 2019; 15:157. [PMID: 31773355 PMCID: PMC6879453 DOI: 10.1007/s11306-019-1600-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/20/2019] [Accepted: 09/27/2019] [Indexed: 11/30/2022]
Abstract
INTRODUCTION Pre-eclampsia is a hypertensive gestational disorder that affects approximately 5% of all pregnancies. OBJECTIVES As the pathophysiological processes of pre-eclampsia are still uncertain, the present case-control study explored underlying metabolic processes characterising this disease. METHODS Maternal peripheral plasma samples were collected from pre-eclamptic (n = 32) and healthy pregnant women (n = 35) in the third trimester. After extraction, high-resolution mass spectrometry-based untargeted metabolomics was used to profile polar and apolar metabolites and the resulting data were analysed via uni- and multivariate statistical approaches. RESULTS The study demonstrated that the metabolome undergoes substantial changes in pre-eclamptic women. Amongst the most discriminative metabolites were hydroxyhexacosanoic acid, diacylglycerols, glycerophosphoinositols, nicotinamide adenine dinucleotide metabolites, bile acids and products of amino acid metabolism. CONCLUSIONS The putatively identified compounds provide sources for novel hypotheses to help understanding of the underlying biochemical pathology of pre-eclampsia.
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Affiliation(s)
- Katrin N Sander
- Division of Medical Science and Graduate Entry Medicine, School of Medicine, University of Nottingham, Royal Derby Hospital, Uttoxeter Road, Derby, DE22 3DT, UK
- Centre for Analytical Bioscience, School of Pharmacy, University of Nottingham, Nottingham, NG7 2RD, UK
| | - Dong-Hyun Kim
- Centre for Analytical Bioscience, School of Pharmacy, University of Nottingham, Nottingham, NG7 2RD, UK
| | - Catharine A Ortori
- Centre for Analytical Bioscience, School of Pharmacy, University of Nottingham, Nottingham, NG7 2RD, UK
| | - Averil Y Warren
- Division of Medical Science and Graduate Entry Medicine, School of Medicine, University of Nottingham, Royal Derby Hospital, Uttoxeter Road, Derby, DE22 3DT, UK
| | - Uchenna C Anyanwagu
- Division of Medical Science and Graduate Entry Medicine, School of Medicine, University of Nottingham, Royal Derby Hospital, Uttoxeter Road, Derby, DE22 3DT, UK
| | - Daniel P Hay
- Division of Medical Science and Graduate Entry Medicine, School of Medicine, University of Nottingham, Royal Derby Hospital, Uttoxeter Road, Derby, DE22 3DT, UK
| | - Fiona Broughton Pipkin
- Division of Child Health, Obstetrics & Gynaecology, School of Medicine, University of Nottingham, City Hospital, Nottingham, NG5 1PB, UK
| | - Raheela N Khan
- Division of Medical Science and Graduate Entry Medicine, School of Medicine, University of Nottingham, Royal Derby Hospital, Uttoxeter Road, Derby, DE22 3DT, UK.
| | - David A Barrett
- Centre for Analytical Bioscience, School of Pharmacy, University of Nottingham, Nottingham, NG7 2RD, UK
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31
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Xu J, Clare CE, Brassington AH, Sinclair KD, Barrett DA. Comprehensive and quantitative profiling of B vitamins and related compounds in the mammalian liver. J Chromatogr B Analyt Technol Biomed Life Sci 2019; 1136:121884. [PMID: 31821966 PMCID: PMC6961113 DOI: 10.1016/j.jchromb.2019.121884] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Revised: 10/08/2019] [Accepted: 11/13/2019] [Indexed: 12/26/2022]
Abstract
A validated method for quantification of 13 B vitamins and four related compounds in sheep liver. Limits of detection for the majority of analytes were within the range of 0.4–3.2 pmol/g. Simple sample extraction procedure with high throughput. Successfully applied to profile 1C major forms in 266 sheep liver samples. Potential for dietary and genetic studies in metabolic health and epigenetic gene regulation.
A method for the simultaneous quantification of B vitamins and related amines in one-carbon (1C) metabolism would benefit the study of diet and genetic/epigenetic regulation of mammalian development and health. We present a validated method for the simultaneous quantitative analysis of 13 B vitamers and four related 1C-pathway amine intermediates in liver using hydrophilic interaction chromatography (HILIC) coupled to electrospray ionization tandem mass spectrometry. Frozen sheep liver samples (50 mg) were homogenized in cold 50% acetonitrile containing 1% acetic acid with the addition of two isotope labelled internal standards. Hot acid hydrolysis was applied to release the protein-bound forms. The separation of 17 analytes was achieved using a pHILIC column with a total run time of 13 min. Detection was achieved in electrospray positive ionisation mode. Limits of detection for the majority of analytes were within the range of 0.4–3.2 pmol/g. The method was applied to 266 sheep liver samples and revealed that adenosylcobalamin, methylcobalamin, pyridoxic acid, flavin adenine dinucleotide and thiamine were the major forms of the B vitamers present with pyridoxal 5′-phosphate and thiamine pyrophosphate being detected at lower concentrations. Trimethylglycine and methylglycine were the predominant 1C-related amines measured. As anticipated, the B vitamin status of individuals varied considerably, reflecting dietary and genetic variation in our chosen outbred model species. This method offers a simple sample extraction procedure and provides comprehensive coverage of B vitamins coupled with good sensitivity and reliability.
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Affiliation(s)
- Juan Xu
- Centre for Analytical Bioscience, Division of Advanced Materials and Healthcare Technologies, School of Pharmacy, University of Nottingham, Nottingham NG7 2RD, UK; School of Bioscience, University of Nottingham, Sutton Bonington, Leicestershire LE12 5RD, UK
| | - Constance E Clare
- Centre for Analytical Bioscience, Division of Advanced Materials and Healthcare Technologies, School of Pharmacy, University of Nottingham, Nottingham NG7 2RD, UK; School of Bioscience, University of Nottingham, Sutton Bonington, Leicestershire LE12 5RD, UK
| | - Amey H Brassington
- School of Bioscience, University of Nottingham, Sutton Bonington, Leicestershire LE12 5RD, UK
| | - Kevin D Sinclair
- School of Bioscience, University of Nottingham, Sutton Bonington, Leicestershire LE12 5RD, UK.
| | - David A Barrett
- Centre for Analytical Bioscience, Division of Advanced Materials and Healthcare Technologies, School of Pharmacy, University of Nottingham, Nottingham NG7 2RD, UK.
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32
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Sander KN, Ali TY, Warren AY, Hay DP, Broughton Pipkin F, Barrett DA, Khan RN. Pharmacological profile of vascular activity of human stem villous arteries. Placenta 2019; 88:12-19. [PMID: 31574379 DOI: 10.1016/j.placenta.2019.09.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Revised: 09/13/2019] [Accepted: 09/16/2019] [Indexed: 11/15/2022]
Abstract
INTRODUCTION The function of the placental vasculature differs considerably from other systemic vascular beds of the human body. A detailed understanding of the normal placental vascular physiology is the foundation to understand perturbed conditions potentially leading to placental dysfunction. METHODS Behaviour of human stem villous arteries isolated from placentae at term pregnancy was assessed using wire myography. Effects of a selection of known vasoconstrictors and vasodilators of the systemic vasculature were assessed. The morphology of stem villous arteries was examined using IHC and TEM. RESULTS Contractile effects in stem villous arteries were caused by U46619, 5-HT, angiotensin II and endothelin-1 (p ≤ 0.05), whereas noradrenaline and AVP failed to result in a contraction. Dilating effects were seen for histamine, riluzole, nifedipine, papaverine, SNP and SQ29548 (p ≤ 0.05) but not for acetylcholine, bradykinin and substance P. DISCUSSION Stem villous arteries behave differently to vessels of the systemic vasculature and results indicate that the placenta is cut off from the systemic maternal vascular regulation. Particularly, endothelium-dependent processes were attenuated in the placental vasculature, creating a need to determine the role of the endothelium in the placenta in future studies.
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Affiliation(s)
- Katrin N Sander
- Division of Medical Science and Graduate Entry Medicine, School of Medicine, University of Nottingham, The Royal Derby Hospital, Uttoxeter Road, Derby, DE22 3DT, UK; Advanced Materials and Healthcare Technologies Division, Centre for Analytical Bioscience, School of Pharmacy, University of Nottingham, University Park, Nottingham, NG7 2RD, UK
| | - Tayyba Y Ali
- Division of Medical Science and Graduate Entry Medicine, School of Medicine, University of Nottingham, The Royal Derby Hospital, Uttoxeter Road, Derby, DE22 3DT, UK
| | - Averil Y Warren
- Division of Medical Science and Graduate Entry Medicine, School of Medicine, University of Nottingham, The Royal Derby Hospital, Uttoxeter Road, Derby, DE22 3DT, UK
| | - Daniel P Hay
- Division of Medical Science and Graduate Entry Medicine, School of Medicine, University of Nottingham, The Royal Derby Hospital, Uttoxeter Road, Derby, DE22 3DT, UK
| | - Fiona Broughton Pipkin
- Division of Child Health, Obstetrics and Gynaecology, School of Medicine, City Hospital, Maternity Unit, Hucknall Road, Nottingham NG5 1PB, UK
| | - David A Barrett
- Advanced Materials and Healthcare Technologies Division, Centre for Analytical Bioscience, School of Pharmacy, University of Nottingham, University Park, Nottingham, NG7 2RD, UK
| | - Raheela N Khan
- Division of Medical Science and Graduate Entry Medicine, School of Medicine, University of Nottingham, The Royal Derby Hospital, Uttoxeter Road, Derby, DE22 3DT, UK.
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Starr NJ, Abdul Hamid K, Wibawa J, Marlow I, Bell M, Pérez-García L, Barrett DA, Scurr DJ. Enhanced vitamin C skin permeation from supramolecular hydrogels, illustrated using in situ ToF-SIMS 3D chemical profiling. Int J Pharm 2019; 563:21-29. [PMID: 30885652 DOI: 10.1016/j.ijpharm.2019.03.028] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Revised: 03/12/2019] [Accepted: 03/14/2019] [Indexed: 01/10/2023]
Abstract
Vitamin C (ascorbic acid) is a naturally occurring, powerful anti-oxidant with the potential to deliver numerous benefits to the skin when applied topically. However, topical use of this compound is currently restricted by an instability in traditional formulations and the delivery and eventual fate of precursor compounds has been largely unexplored. Time of flight secondary ion mass spectrometry (ToF-SIMS) is an emerging technique in the field of skin research and offers detailed chemical analysis, with high mass and spatial resolution, as well as profiling capabilities that allow analysis as a function of sample depth. This work demonstrates the successful use of ToF-SIMS to obtain, in situ, accurate 3D permeation profiles of both ascorbic acid and a popular precursor, ascorbyl glucoside, from ex vivo porcine skin. The significant permeation enhancing effect of a supramolecular hydrogel formulation, produced from an amphiphilic gemini imidazolium-based surfactant, was also demonstrated for both compounds. Using ToF-SIMS, it was also possible to detect and track the breakdown of ascorbyl glucoside into ascorbic acid, elucidating the ability of the hydrogel formulation to preserve this important conversion until the targeted epidermal layer has been reached. This work demonstrates the potential of ToF-SIMS to provide 3D permeation profiles collected in situ from ex vivo tissue samples, offering detailed analysis on compound localisation and degradation. This type of analysis has significant advantages in the area of skin permeation, but can also be readily translated to other tissue types.
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Affiliation(s)
- Nichola J Starr
- Advanced Materials and Healthcare Technologies, School of Pharmacy, University of Nottingham, NG7 2RD, UK
| | - Khuriah Abdul Hamid
- Advanced Materials and Healthcare Technologies, School of Pharmacy, University of Nottingham, NG7 2RD, UK
| | | | - Ian Marlow
- Walgreens Boots Alliance, Nottingham NG90 1BS, UK
| | - Mike Bell
- Walgreens Boots Alliance, Nottingham NG90 1BS, UK
| | - Luïsa Pérez-García
- Advanced Materials and Healthcare Technologies, School of Pharmacy, University of Nottingham, NG7 2RD, UK
| | - David A Barrett
- Advanced Materials and Healthcare Technologies, School of Pharmacy, University of Nottingham, NG7 2RD, UK
| | - David J Scurr
- Advanced Materials and Healthcare Technologies, School of Pharmacy, University of Nottingham, NG7 2RD, UK.
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Dahabiyeh LA, Tooth D, Barrett DA. Profiling of 54 plasma glycoproteins by label-free targeted LC-MS/MS. Anal Biochem 2019; 567:72-81. [DOI: 10.1016/j.ab.2018.12.011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2018] [Revised: 12/12/2018] [Accepted: 12/12/2018] [Indexed: 01/02/2023]
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Kozijn AE, Tartjiono MT, Ravipati S, van der Ham F, Barrett DA, Mastbergen SC, Korthagen NM, Lafeber FPJG, Zuurmond AM, Bobeldijk I, Weinans H, Stoop R. Human C-reactive protein aggravates osteoarthritis development in mice on a high-fat diet. Osteoarthritis Cartilage 2019; 27:118-128. [PMID: 30248505 DOI: 10.1016/j.joca.2018.09.007] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/22/2018] [Revised: 07/17/2018] [Accepted: 09/13/2018] [Indexed: 02/02/2023]
Abstract
OBJECTIVE C-reactive protein (CRP) levels can be elevated in osteoarthritis (OA) patients. In addition to indicating systemic inflammation, it is suggested that CRP itself can play a role in OA development. Obesity and metabolic syndrome are important risk factors for OA and also induce elevated CRP levels. Here we evaluated in a human CRP (hCRP)-transgenic mouse model whether CRP itself contributes to the development of 'metabolic' OA. DESIGN Metabolic OA was induced by feeding 12-week-old hCRP-transgenic males (hCRP-tg, n = 30) and wild-type littermates (n = 15) a 45 kcal% high-fat diet (HFD) for 38 weeks. Cartilage degradation, osteophytes and synovitis were graded on Safranin O-stained histological knee joint sections. Inflammatory status was assessed by plasma lipid profiling, flow cytometric analyses of blood immune cell populations and immunohistochemical staining of synovial macrophage subsets. RESULTS Male hCRP-tg mice showed aggravated OA severity and increased osteophytosis compared with their wild-type littermates. Both classical and non-classical monocytes showed increased expression of CCR2 and CD86 in hCRP-tg males. HFD-induced effects were evident for nearly all lipids measured and indicated a similar low-grade systemic inflammation for both genotypes. Synovitis scores and synovial macrophage subsets were similar in the two groups. CONCLUSIONS Human CRP expression in a background of HFD-induced metabolic dysfunction resulted in the aggravation of OA through increased cartilage degeneration and osteophytosis. Increased recruitment of classical and non-classical monocytes might be a mechanism of action through which CRP is involved in aggravating this process. These findings suggest interventions selectively directed against CRP activity could ameliorate metabolic OA development.
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Affiliation(s)
- A E Kozijn
- Metabolic Health Research, TNO, Leiden, the Netherlands; Department of Orthopaedics, University Medical Center (UMC) Utrecht, Utrecht University, Utrecht, The Netherlands; Department of Rheumatology & Clinical Immunology, UMC Utrecht, Utrecht University, Utrecht, The Netherlands
| | - M T Tartjiono
- Metabolic Health Research, TNO, Leiden, the Netherlands
| | - S Ravipati
- Centre for Analytical Bioscience, School of Pharmacy, University of Nottingham, Nottingham, United Kingdom
| | - F van der Ham
- Metabolic Health Research, TNO, Leiden, the Netherlands
| | - D A Barrett
- Centre for Analytical Bioscience, School of Pharmacy, University of Nottingham, Nottingham, United Kingdom
| | - S C Mastbergen
- Department of Rheumatology & Clinical Immunology, UMC Utrecht, Utrecht University, Utrecht, The Netherlands
| | - N M Korthagen
- Department of Orthopaedics, University Medical Center (UMC) Utrecht, Utrecht University, Utrecht, The Netherlands; Department of Equine Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - F P J G Lafeber
- Department of Rheumatology & Clinical Immunology, UMC Utrecht, Utrecht University, Utrecht, The Netherlands
| | - A M Zuurmond
- Metabolic Health Research, TNO, Leiden, the Netherlands
| | - I Bobeldijk
- Metabolic Health Research, TNO, Leiden, the Netherlands
| | - H Weinans
- Department of Orthopaedics, University Medical Center (UMC) Utrecht, Utrecht University, Utrecht, The Netherlands; Department of Rheumatology & Clinical Immunology, UMC Utrecht, Utrecht University, Utrecht, The Netherlands; Department of Biomechanical Engineering, Delft University of Technology, Delft, The Netherlands
| | - R Stoop
- Metabolic Health Research, TNO, Leiden, the Netherlands.
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Stone NL, Millar SA, Herrod PJJ, Barrett DA, Ortori CA, Mellon VA, O'Sullivan SE. An Analysis of Endocannabinoid Concentrations and Mood Following Singing and Exercise in Healthy Volunteers. Front Behav Neurosci 2018; 12:269. [PMID: 30534062 PMCID: PMC6275239 DOI: 10.3389/fnbeh.2018.00269] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2018] [Accepted: 10/22/2018] [Indexed: 02/05/2023] Open
Abstract
The euphoric feeling described after running is, at least in part, due to increased circulating endocannabinoids (eCBs). eCBs are lipid signaling molecules involved in reward, appetite, mood, memory and neuroprotection. The aim of this study was to investigate whether activities other than running can increase circulating eCBs. Nine healthy female volunteers (mean 61 years) were recruited from a local choir. Circulating eCBs, haemodynamics, mood and hunger ratings were measured before and immediately after 30 min of dance, reading, singing or cycling in a fasted state. Singing increased plasma levels of anandamide (AEA) by 42% (P < 0.05), palmitoylethanolamine (PEA) by 53% (P < 0.01) and oleoylethanolamine (OEA) by 34% (P < 0.05) and improved positive mood and emotions (P < 0.01), without affecting hunger scores. Dancing did not affect eCB levels or hunger ratings, but decreased negative mood and emotions (P < 0.01). Cycling increased OEA levels by 26% (P < 0.05) and tended to decrease how hungry volunteers felt, without affecting mood. Reading increased OEA levels by 28% (P < 0.01) and increased the desire to eat. Plasma AEA levels were positively correlated with how full participants felt (P < 0.05). Plasma OEA levels were positively correlated with positive mood and emotions (P < 0.01). All three ethanolamines were positively correlated with heart rate (HR; P < 0.0001). These data suggest that activities other than running can increase plasma eCBs associated with changes in mood or appetite. Increases in eCBs may underlie the rewarding and pleasurable effects of singing and exercise and ultimately some of the long-term beneficial effects on mental health, cognition and memory.
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Affiliation(s)
- Nicole L Stone
- Division of Medical Sciences and Graduate Entry Medicine, School of Medicine, University of Nottingham, Nottingham, United Kingdom
| | - Sophie A Millar
- Division of Medical Sciences and Graduate Entry Medicine, School of Medicine, University of Nottingham, Nottingham, United Kingdom
| | - Philip J J Herrod
- Division of Medical Sciences and Graduate Entry Medicine, School of Medicine, University of Nottingham, Nottingham, United Kingdom
| | - David A Barrett
- Centre for Analytical Bioscience, Advanced Materials and Healthcare Division, School of Pharmacy, University of Nottingham, Nottingham, United Kingdom
| | - Catharine A Ortori
- Centre for Analytical Bioscience, Advanced Materials and Healthcare Division, School of Pharmacy, University of Nottingham, Nottingham, United Kingdom
| | - Valerie A Mellon
- BBC Studios "Trust Me I'm a Doctor", BBC Scotland, Glasgow, United Kingdom
| | - Saoirse E O'Sullivan
- Division of Medical Sciences and Graduate Entry Medicine, School of Medicine, University of Nottingham, Nottingham, United Kingdom
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Sander KN, Hay DP, Broughton Pipkin F, Khan RN, Barrett DA. Evaluation of extraction and normalisation strategies for the analysis of lipids in placental vessels. J Pharm Biomed Anal 2018; 160:297-300. [PMID: 30114607 DOI: 10.1016/j.jpba.2018.08.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Revised: 08/02/2018] [Accepted: 08/06/2018] [Indexed: 11/26/2022]
Abstract
The analysis of lipids in tough or fibrous biological tissues can be challenging due to difficulties in obtaining a representative sample following homogenisation of the tissue. Furthermore, the choice of normalisation method can have a major effect on the quality of quantitative results. Therefore, a range of mechanical homogenisation techniques and normalisation strategies were evaluated for application to human placental vessels. The findings showed that rotor-stator homogenisation in a suitable solvent and wet weight normalisation were the best combination of procedures for quantitative analysis of lipids in placental blood vessels.
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Affiliation(s)
- Katrin N Sander
- Division of Medical Science and Graduate Entry Medicine, School of Medicine, University of Nottingham, The Royal Derby Hospital, Uttoxeter Road, Derby, DE22 3DT, UK; Advanced Materials and Healthcare Technologies Division, Centre for Analytical Bioscience, School of Pharmacy, University of Nottingham, University Park, Nottingham, NG7 2RD, UK
| | - Daniel P Hay
- Division of Medical Science and Graduate Entry Medicine, School of Medicine, University of Nottingham, The Royal Derby Hospital, Uttoxeter Road, Derby, DE22 3DT, UK
| | - Fiona Broughton Pipkin
- Obstetrics & Gynaecology, Faculty of Medicine, University of Nottingham, Queen's Medical Centre, Nottingham, NG7 2UH, UK
| | - Raheela N Khan
- Division of Medical Science and Graduate Entry Medicine, School of Medicine, University of Nottingham, The Royal Derby Hospital, Uttoxeter Road, Derby, DE22 3DT, UK
| | - David A Barrett
- Advanced Materials and Healthcare Technologies Division, Centre for Analytical Bioscience, School of Pharmacy, University of Nottingham, University Park, Nottingham, NG7 2RD, UK.
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Alharthi N, Christensen P, Hourani W, Ortori C, Barrett DA, Bennett AJ, Chapman V, Alexander SPH. n-3 polyunsaturated N-acylethanolamines are CB 2 cannabinoid receptor-preferring endocannabinoids. Biochim Biophys Acta Mol Cell Biol Lipids 2018; 1863:1433-1440. [PMID: 30591150 DOI: 10.1016/j.bbalip.2018.08.003] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Revised: 07/18/2018] [Accepted: 08/04/2018] [Indexed: 12/16/2022]
Abstract
Anandamide, the first identified endogenous cannabinoid and TRPV1 agonist, is one of a series of endogenous N-acylethanolamines, NAEs. We have generated novel assays to quantify the levels of multiple NAEs in biological tissues and their rates of hydrolysis through fatty acid amide hydrolase. This range of NAEs was also tested in rapid response assays of CB1, CB2 cannabinoid and TRPV1 receptors. The data indicate that PEA, SEA and OEA are not endocannabinoids or endovanilloids, and that the higher endogenous levels of these metabolites compared to polyunsaturated analogues are a correlate of their slow rates of hydrolysis. The n-6 NAEs (AEA, docosatetraenoyl and docosapentaenoyl derivatives) activated both CB1 and CB2 receptors, as well as TRPV1 channels, suggesting them to be 'genuine' endocannabinoids and 'endovanilloids'. The n-3 NAEs (eicosapentaenoyl, docosapentaenoyl and docosahexaenoyl derivatives) activated CB2 receptors and some n-3 NAEs (docosapentaenoyl and docosahexaenoyl derivatives) also activated TRPV1 channels, but failed to activate the CB1 receptor. We hypothesise that the preferential activation of CB2 receptors by n-3 PUFA NAEs contributes, at least in some part, to their broad anti-inflammatory profile.
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Affiliation(s)
- Nahed Alharthi
- School of Life Sciences, University of Nottingham Medical School, Nottingham NG7 2UH, England, United Kingdom of Great Britain and Northern Ireland
| | - Peter Christensen
- School of Pharmacy, University of Nottingham, Nottingham NG7 2RD, England, United Kingdom of Great Britain and Northern Ireland
| | - Wafa Hourani
- School of Life Sciences, University of Nottingham Medical School, Nottingham NG7 2UH, England, United Kingdom of Great Britain and Northern Ireland
| | - Catherine Ortori
- School of Pharmacy, University of Nottingham, Nottingham NG7 2RD, England, United Kingdom of Great Britain and Northern Ireland
| | - David A Barrett
- School of Pharmacy, University of Nottingham, Nottingham NG7 2RD, England, United Kingdom of Great Britain and Northern Ireland
| | - Andrew J Bennett
- School of Life Sciences, University of Nottingham Medical School, Nottingham NG7 2UH, England, United Kingdom of Great Britain and Northern Ireland
| | - Victoria Chapman
- School of Life Sciences, University of Nottingham Medical School, Nottingham NG7 2UH, England, United Kingdom of Great Britain and Northern Ireland
| | - Stephen P H Alexander
- School of Life Sciences, University of Nottingham Medical School, Nottingham NG7 2UH, England, United Kingdom of Great Britain and Northern Ireland.
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Sloan TJ, Jalanka J, Major GAD, Krishnasamy S, Pritchard S, Abdelrazig S, Korpela K, Singh G, Mulvenna C, Hoad CL, Marciani L, Barrett DA, Lomer MCE, de Vos WM, Gowland PA, Spiller RC. A low FODMAP diet is associated with changes in the microbiota and reduction in breath hydrogen but not colonic volume in healthy subjects. PLoS One 2018; 13:e0201410. [PMID: 30048547 PMCID: PMC6062106 DOI: 10.1371/journal.pone.0201410] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2018] [Accepted: 06/14/2018] [Indexed: 12/12/2022] Open
Abstract
Background & aims Ingestion of poorly digested, fermentable carbohydrates (fermentable oligo-, di-, mono-saccharides and polyols; FODMAPs) have been implicated in exacerbating intestinal symptoms and the reduction of intake with symptom alleviation. Restricting FODMAP intake is believed to relieve colonic distension by reducing colonic fermentation but this has not been previously directly assessed. We performed a randomised controlled trial comparing the effect of a low FODMAP diet combined with either maltodextrin or oligofructose on colonic contents, metabolites and microbiota. Methods A parallel randomised controlled trial in healthy adults (n = 37). All subjects followed a low FODMAP diet for a week and supplemented their diet with either maltodextrin (MD) or oligofructose (OF) 7g twice daily. Fasted assessments performed pre- and post-diet included MRI to assess colonic volume, breath testing for hydrogen and methane, and stool collection for microbiota analysis. Results The low FODMAP diet was associated with a reduction in Bifidobacterium and breath hydrogen, which was reversed by oligofructose supplementation. The difference in breath hydrogen between groups post-intervention was 27ppm (95% CI 7 to 50, P<0.01). Colonic volume increased significantly from baseline in both groups (OF increased 110ml (19.6%), 95% CI 30ml to 190ml, P = 0.01; MD increased 90ml (15.5%), 95% CI 6ml to 175ml, P = 0.04) with no significant difference between them. Colonic volumes correlated with total breath hydrogen + methane. A divergence in Clostridiales abundance was observed with increased abundance of Ruminococcaceae in the maltodextrin group, while in the oligofructose group, Lachnospiraceae decreased. Subjects in either group with high methane production also tended to have high microbial diversity, high colonic volume and greater abundance of methanogens. Conclusion A low FODMAP diet reduces total bacterial count and gas production with little effect on colonic volume.
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Affiliation(s)
- Tim J. Sloan
- The NIHR Nottingham Biomedical Research Centre (BRC) at Nottingham University Hospitals NHS Trust and the University of Nottingham, Nottingham, United Kingdom
- School of Life Sciences, University of Nottingham, Nottingham, United Kingdom
- Department of Clinical Microbiology, Nottingham University Hospitals NHS Trust, Nottingham, United Kingdom
| | - Jonna Jalanka
- The NIHR Nottingham Biomedical Research Centre (BRC) at Nottingham University Hospitals NHS Trust and the University of Nottingham, Nottingham, United Kingdom
- Nottingham Digestive Diseases Centre, School of Medicine, University of Nottingham, Nottingham, United Kingdom
- Immunobiology Research Program, University of Helsinki, Helsinki, Finland
| | - Giles A. D. Major
- The NIHR Nottingham Biomedical Research Centre (BRC) at Nottingham University Hospitals NHS Trust and the University of Nottingham, Nottingham, United Kingdom
- Nottingham Digestive Diseases Centre, School of Medicine, University of Nottingham, Nottingham, United Kingdom
| | - Shanthi Krishnasamy
- The NIHR Nottingham Biomedical Research Centre (BRC) at Nottingham University Hospitals NHS Trust and the University of Nottingham, Nottingham, United Kingdom
- Nottingham Digestive Diseases Centre, School of Medicine, University of Nottingham, Nottingham, United Kingdom
| | - Sue Pritchard
- The NIHR Nottingham Biomedical Research Centre (BRC) at Nottingham University Hospitals NHS Trust and the University of Nottingham, Nottingham, United Kingdom
- Sir Peter Mansfield Imaging Centre, School of Physics and Astronomy, University of Nottingham, Nottingham, United Kingdom
| | - Salah Abdelrazig
- The NIHR Nottingham Biomedical Research Centre (BRC) at Nottingham University Hospitals NHS Trust and the University of Nottingham, Nottingham, United Kingdom
- Centre for Analytical Bioscience, Advanced Materials and Healthcare Technology Division, School of Pharmacy, University of Nottingham, Nottingham, United Kingdom
| | - Katri Korpela
- Immunobiology Research Program, University of Helsinki, Helsinki, Finland
| | - Gulzar Singh
- The NIHR Nottingham Biomedical Research Centre (BRC) at Nottingham University Hospitals NHS Trust and the University of Nottingham, Nottingham, United Kingdom
- Nottingham Digestive Diseases Centre, School of Medicine, University of Nottingham, Nottingham, United Kingdom
| | - Claire Mulvenna
- The NIHR Nottingham Biomedical Research Centre (BRC) at Nottingham University Hospitals NHS Trust and the University of Nottingham, Nottingham, United Kingdom
- Nottingham Digestive Diseases Centre, School of Medicine, University of Nottingham, Nottingham, United Kingdom
| | - Caroline L. Hoad
- The NIHR Nottingham Biomedical Research Centre (BRC) at Nottingham University Hospitals NHS Trust and the University of Nottingham, Nottingham, United Kingdom
- Sir Peter Mansfield Imaging Centre, School of Physics and Astronomy, University of Nottingham, Nottingham, United Kingdom
| | - Luca Marciani
- The NIHR Nottingham Biomedical Research Centre (BRC) at Nottingham University Hospitals NHS Trust and the University of Nottingham, Nottingham, United Kingdom
- Nottingham Digestive Diseases Centre, School of Medicine, University of Nottingham, Nottingham, United Kingdom
| | - David A. Barrett
- The NIHR Nottingham Biomedical Research Centre (BRC) at Nottingham University Hospitals NHS Trust and the University of Nottingham, Nottingham, United Kingdom
- Centre for Analytical Bioscience, Advanced Materials and Healthcare Technology Division, School of Pharmacy, University of Nottingham, Nottingham, United Kingdom
| | - Miranda C. E. Lomer
- Department of Nutritional Sciences, King’s College London, London, United Kingdom
| | - Willem M. de Vos
- Immunobiology Research Program, University of Helsinki, Helsinki, Finland
| | - Penny A. Gowland
- The NIHR Nottingham Biomedical Research Centre (BRC) at Nottingham University Hospitals NHS Trust and the University of Nottingham, Nottingham, United Kingdom
- Sir Peter Mansfield Imaging Centre, School of Physics and Astronomy, University of Nottingham, Nottingham, United Kingdom
| | - Robin C. Spiller
- The NIHR Nottingham Biomedical Research Centre (BRC) at Nottingham University Hospitals NHS Trust and the University of Nottingham, Nottingham, United Kingdom
- Nottingham Digestive Diseases Centre, School of Medicine, University of Nottingham, Nottingham, United Kingdom
- * E-mail:
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Valdes AM, Ravipati S, Pousinis P, Menni C, Mangino M, Abhishek A, Chapman V, Barrett DA, Doherty M. Omega-6 oxylipins generated by soluble epoxide hydrolase are associated with knee osteoarthritis. J Lipid Res 2018; 59:1763-1770. [PMID: 29986999 PMCID: PMC6121933 DOI: 10.1194/jlr.p085118] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Revised: 07/02/2018] [Indexed: 11/30/2022] Open
Abstract
Omega-6 FAs are inflammatory mediators that are increased in joints with osteoarthritis (OA), but their association with OA progression is not yet well defined. To investigate the relationship between omega-6 FAs and knee OA, we measured with LC-MS the levels of 22 omega-6 lipids (arachidonic acid, linoleic acid, and 20 oxylipins) in synovial fluid (SF) from 112 knees of 102 individuals (58 with knee OA; 44 controls). We hypothesized that oxylipin metabolites would increase in OA knee SF and with radiographically progressive disease. We validated results by comparing samples from affected and unaffected knees in 10 individuals with unilateral OA. In adjusted analysis, SF levels of three omega-6 oxylipins [prostaglandin D2, 11,12-dihydroxyeicosatrienoic acid (DHET), and 14,15-DHET] were associated with OA. Of these, 11,12-DHET and 14,15-DHET were higher in affected versus unaffected knees of people with unilateral disease (P < 0.014 and P < 0.003, respectively). Levels of these and 8,9-DHET were also associated with radiographic progression over 3.3 years in 87 individuals. Circulating levels of all three were associated with gene variants at the soluble epoxide hydrolase enzyme. Lipidomic profiling in SF identified an additional inflammatory pathway associated with knee OA and radiographic progression.
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Affiliation(s)
- Ana M Valdes
- Academic Rheumatology, Nottingham City Hospital, Nottingham, United Kingdom; National Institute for Health Research Nottingham Biomedical Research Centre, University of Nottingham, Nottingham, United Kingdom; Department of Twin Research, King's College London, St Thomas' Hospital, London, United Kingdom; Arthritis Research UK Centre of Excellence for Pain, University of Nottingham, Nottingham, United Kingdom.
| | - Srinivasarao Ravipati
- Centre for Analytical Bioscience, School of Pharmacy, University of Nottingham, Nottingham, United Kingdom
| | - Petros Pousinis
- Centre for Analytical Bioscience, School of Pharmacy, University of Nottingham, Nottingham, United Kingdom
| | - Cristina Menni
- Department of Twin Research, King's College London, St Thomas' Hospital, London, United Kingdom
| | - Massimo Mangino
- Department of Twin Research, King's College London, St Thomas' Hospital, London, United Kingdom
| | - Abhishek Abhishek
- Academic Rheumatology, Nottingham City Hospital, Nottingham, United Kingdom
| | - Victoria Chapman
- School of Life Sciences, University of Nottingham, Nottingham, United Kingdom; Arthritis Research UK Centre of Excellence for Pain, University of Nottingham, Nottingham, United Kingdom
| | - David A Barrett
- Centre for Analytical Bioscience, School of Pharmacy, University of Nottingham, Nottingham, United Kingdom
| | - Michael Doherty
- Academic Rheumatology, Nottingham City Hospital, Nottingham, United Kingdom; National Institute for Health Research Nottingham Biomedical Research Centre, University of Nottingham, Nottingham, United Kingdom; Arthritis Research UK Centre of Excellence for Pain, University of Nottingham, Nottingham, United Kingdom
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Fainberg HP, Birtwistle M, Alagal R, Alhaddad A, Pope M, Davies G, Woods R, Castellanos M, May ST, Ortori CA, Barrett DA, Perry V, Wiens F, Stahl B, van der Beek E, Sacks H, Budge H, Symonds ME. Transcriptional analysis of adipose tissue during development reveals depot-specific responsiveness to maternal dietary supplementation. Sci Rep 2018; 8:9628. [PMID: 29941966 PMCID: PMC6018169 DOI: 10.1038/s41598-018-27376-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Accepted: 05/30/2018] [Indexed: 01/23/2023] Open
Abstract
Brown adipose tissue (BAT) undergoes pronounced changes after birth coincident with the loss of the BAT-specific uncoupling protein (UCP)1 and rapid fat growth. The extent to which this adaptation may vary between anatomical locations remains unknown, or whether the process is sensitive to maternal dietary supplementation. We, therefore, conducted a data mining based study on the major fat depots (i.e. epicardial, perirenal, sternal (which possess UCP1 at 7 days), subcutaneous and omental) (that do not possess UCP1) of young sheep during the first month of life. Initially we determined what effect adding 3% canola oil to the maternal diet has on mitochondrial protein abundance in those depots which possessed UCP1. This demonstrated that maternal dietary supplementation delayed the loss of mitochondrial proteins, with the amount of cytochrome C actually being increased. Using machine learning algorithms followed by weighted gene co-expression network analysis, we demonstrated that each depot could be segregated into a unique and concise set of modules containing co-expressed genes involved in adipose function. Finally using lipidomic analysis following the maternal dietary intervention, we confirmed the perirenal depot to be most responsive. These insights point at new research avenues for examining interventions to modulate fat development in early life.
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Affiliation(s)
- Hernan P Fainberg
- Division of Child Health, Obstetrics & Gynaecology, The University of Nottingham, Nottingham, United Kingdom
| | - Mark Birtwistle
- Division of Child Health, Obstetrics & Gynaecology, The University of Nottingham, Nottingham, United Kingdom
| | - Reham Alagal
- Division of Child Health, Obstetrics & Gynaecology, The University of Nottingham, Nottingham, United Kingdom.,Princess Nourah Bint Abdulrahman University, Department of Nutrition and food science, College of Home Economics, Riyadh, BOX: 84428, Saudi Arabia
| | - Ahmad Alhaddad
- Division of Child Health, Obstetrics & Gynaecology, The University of Nottingham, Nottingham, United Kingdom
| | - Mark Pope
- Division of Child Health, Obstetrics & Gynaecology, The University of Nottingham, Nottingham, United Kingdom
| | - Graeme Davies
- Division of Child Health, Obstetrics & Gynaecology, The University of Nottingham, Nottingham, United Kingdom
| | - Rachel Woods
- Division of Child Health, Obstetrics & Gynaecology, The University of Nottingham, Nottingham, United Kingdom
| | - Marcos Castellanos
- Nottingham Arabidopsis Stock Centre, School of Biosciences, The University of Nottingham, Nottingham, United Kingdom
| | - Sean T May
- Nottingham Arabidopsis Stock Centre, School of Biosciences, The University of Nottingham, Nottingham, United Kingdom
| | - Catharine A Ortori
- Centre for Analytical Bioscience, School of Pharmacy, The University of Nottingham, Nottingham, United Kingdom
| | - David A Barrett
- Centre for Analytical Bioscience, School of Pharmacy, The University of Nottingham, Nottingham, United Kingdom
| | - Viv Perry
- Robinson Research Institute, Medical School, University of Adelaide, Adelaide, Australia
| | | | | | - Eline van der Beek
- Nutricia Research, Utrecht, The Netherlands.,Department of Pediatrics, University Medical Centre Groningen, University of Groningen, Groningen, The Netherlands
| | - Harold Sacks
- VA Endocrinology and Diabetes Division, VA Greater Los Angeles Healthcare System, and Department of Medicine, David Geffen School of Medicine, University of California Los Angeles, California, USA
| | - Helen Budge
- Division of Child Health, Obstetrics & Gynaecology, The University of Nottingham, Nottingham, United Kingdom
| | - Michael E Symonds
- Division of Child Health, Obstetrics & Gynaecology, The University of Nottingham, Nottingham, United Kingdom. .,Nottingham Digestive Disease Centre and Biomedical Research Centre, School of Medicine, Queen's Medical Centre, The University of Nottingham, Nottingham, United Kingdom.
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Meurs J, Alexander MR, Levkin PA, Widmaier S, Bunch J, Barrett DA, Kim DH. Improved Extraction Repeatability and Spectral Reproducibility for Liquid Extraction Surface Analysis–Mass Spectrometry Using Superhydrophobic–Superhydrophilic Patterning. Anal Chem 2018; 90:6001-6005. [DOI: 10.1021/acs.analchem.8b00973] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Joris Meurs
- Advanced Materials and Healthcare Technology Division, School of Pharmacy, University of Nottingham, University Park, Nottingham, NG7 2RD, United Kingdom
| | - Morgan R. Alexander
- Advanced Materials and Healthcare Technology Division, School of Pharmacy, University of Nottingham, University Park, Nottingham, NG7 2RD, United Kingdom
| | - Pavel A. Levkin
- Institute of Toxicology and Genetics, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz Platz 1, Eggenstein-Leopoldshafen, 76344, Germany
- Institute of Organic Chemistry, Karlsruhe Institute of Technology (KIT), Karlsruhe, 76131, Germany
| | - Simon Widmaier
- Institute of Toxicology and Genetics, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz Platz 1, Eggenstein-Leopoldshafen, 76344, Germany
| | - Josephine Bunch
- National Centre of Excellence in Mass Spectrometry Imaging, National Physical Laboratory, Hampton Road, Teddington, Middlesex TW11 0LW, United Kingdom
| | - David A. Barrett
- Advanced Materials and Healthcare Technology Division, School of Pharmacy, University of Nottingham, University Park, Nottingham, NG7 2RD, United Kingdom
| | - Dong-Hyun Kim
- Advanced Materials and Healthcare Technology Division, School of Pharmacy, University of Nottingham, University Park, Nottingham, NG7 2RD, United Kingdom
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Schatschneider S, Abdelrazig S, Safo L, Henstra AM, Millat T, Kim DH, Winzer K, Minton NP, Barrett DA. Quantitative Isotope-Dilution High-Resolution-Mass-Spectrometry Analysis of Multiple Intracellular Metabolites in Clostridium autoethanogenum with Uniformly 13C-Labeled Standards Derived from Spirulina. Anal Chem 2018. [PMID: 29533656 DOI: 10.1021/acs.analchem.7b04758] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
We have investigated the applicability of commercially available lyophilized spirulina ( Arthrospira platensis), a microorganism uniformly labeled with 13C, as a readily accessible source of multiple 13C-labeled metabolites suitable as internal standards for the quantitative determination of intracellular bacterial metabolites. Metabolites of interest were analyzed by hydrophilic-interaction liquid chromatography coupled with high-resolution mass spectrometry. Multiple internal standards obtained from uniformly (U)-13C-labeled extracts from spirulina were used to enable isotope-dilution mass spectrometry (IDMS) in the identification and quantification of intracellular metabolites. Extraction of the intracellular metabolites of Clostridium autoethanogenum using 2:1:1 chloroform/methanol/water was found to be the optimal method in comparison with freeze-thaw, homogenization, and sonication methods. The limits of quantification were ≤1 μM with excellent linearity for all of the calibration curves ( R2 ≥ 0.99) for 74 metabolites. The precision and accuracy were found to be within relative standard deviations (RSDs) of 15% for 49 of the metabolites and within RSDs of 20% for all of the metabolites. The method was applied to study the effects of feeding different levels of carbon monoxide (as a carbon source) on the central metabolism and Wood-Ljungdahl pathway of C. autoethanogenum grown in continuous culture over 35 days. Using LC-IDMS with U-13C spirulina allowed the successful quantification of 52 metabolites in the samples, including amino acids, carboxylic acids, sugar phosphates, purines, and pyrimidines. The method provided absolute quantitative data on intracellular metabolites that was suitable for computational modeling to understand and optimize the C. autoethanogenum metabolic pathways active in gas fermentation.
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Affiliation(s)
- Sarah Schatschneider
- Centre for Analytical Bioscience, School of Pharmacy , University of Nottingham , Nottingham NG7 2RD , U.K
| | - Salah Abdelrazig
- Centre for Analytical Bioscience, School of Pharmacy , University of Nottingham , Nottingham NG7 2RD , U.K
| | - Laudina Safo
- Centre for Analytical Bioscience, School of Pharmacy , University of Nottingham , Nottingham NG7 2RD , U.K
| | - Anne M Henstra
- Clostridia Research Group, SBRC-Nottingham, a BBSRC/EPSRC Synthetic Biology Research Centre, School of Life Sciences , University of Nottingham , Nottingham NG7 2RD , U.K
| | - Thomas Millat
- Clostridia Research Group, SBRC-Nottingham, a BBSRC/EPSRC Synthetic Biology Research Centre, School of Life Sciences , University of Nottingham , Nottingham NG7 2RD , U.K
| | - Dong-Hyun Kim
- Centre for Analytical Bioscience, School of Pharmacy , University of Nottingham , Nottingham NG7 2RD , U.K
| | - Klaus Winzer
- Clostridia Research Group, SBRC-Nottingham, a BBSRC/EPSRC Synthetic Biology Research Centre, School of Life Sciences , University of Nottingham , Nottingham NG7 2RD , U.K
| | - Nigel P Minton
- Clostridia Research Group, SBRC-Nottingham, a BBSRC/EPSRC Synthetic Biology Research Centre, School of Life Sciences , University of Nottingham , Nottingham NG7 2RD , U.K
| | - David A Barrett
- Centre for Analytical Bioscience, School of Pharmacy , University of Nottingham , Nottingham NG7 2RD , U.K
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Hammad M, Rao W, Smith JGW, Anderson DG, Langer R, Young LE, Barrett DA, Davies MC, Denning C, Alexander MR. Identification of polymer surface adsorbed proteins implicated in pluripotent human embryonic stem cell expansion. Biomater Sci 2018; 4:1381-91. [PMID: 27466628 PMCID: PMC5038343 DOI: 10.1039/c6bm00214e] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The discovery of heat shock proteins as candidates for human pluripotent stem cell culture using high throughput screening.
Improved biomaterials are required for application in regenerative medicine, biosensing, and as medical devices. The response of cells to the chemistry of polymers cultured in media is generally regarded as being dominated by proteins adsorbed to the surface. Here we use mass spectrometry to identify proteins adsorbed from a complex mouse embryonic fibroblast (MEF) conditioned medium found to support pluripotent human embryonic stem cell (hESC) expansion on a plasma etched tissue culture polystyrene surface. A total of 71 proteins were identified, of which 14 uniquely correlated with the surface on which pluripotent stem cell expansion was achieved. We have developed a microarray combinatorial protein spotting approach to test the potential of these 14 proteins to support expansion of a hESC cell line (HUES-7) and a human induced pluripotent stem cell line (ReBl-PAT) on a novel polymer (N-(4-Hydroxyphenyl) methacrylamide). These proteins were spotted to form a primary array yielding several protein mixture ‘hits’ that enhanced cell attachment to the polymer. A second array was generated to test the function of a refined set of protein mixtures. We found that a combination of heat shock protein 90 and heat shock protein-1 encourage elevated adherence of pluripotent stem cells at a level comparable to fibronectin pre-treatment.
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Affiliation(s)
- Moamen Hammad
- Laboratory of Biophysics and Surface Analysis, School of Pharmacy, University of Nottingham, Nottingham, NG7 2RD, UK. morgan.alexander.nottingham.ac.uk
| | - Wei Rao
- Centre for Analytical Bioscience, School of Pharmacy, University of Nottingham, Nottingham, NG7 2RD, UK
| | - James G W Smith
- Wolfson Centre for Stem Cells, Tissue Engineering and Modelling (STEM), University of Nottingham, Nottingham NG7 2RD, UK
| | - Daniel G Anderson
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Robert Langer
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Lorraine E Young
- Wolfson Centre for Stem Cells, Tissue Engineering and Modelling (STEM), University of Nottingham, Nottingham NG7 2RD, UK
| | - David A Barrett
- Centre for Analytical Bioscience, School of Pharmacy, University of Nottingham, Nottingham, NG7 2RD, UK
| | - Martyn C Davies
- Laboratory of Biophysics and Surface Analysis, School of Pharmacy, University of Nottingham, Nottingham, NG7 2RD, UK. morgan.alexander.nottingham.ac.uk
| | - Chris Denning
- Wolfson Centre for Stem Cells, Tissue Engineering and Modelling (STEM), University of Nottingham, Nottingham NG7 2RD, UK
| | - Morgan R Alexander
- Laboratory of Biophysics and Surface Analysis, School of Pharmacy, University of Nottingham, Nottingham, NG7 2RD, UK. morgan.alexander.nottingham.ac.uk
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45
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Snart CJP, Kapranas A, Williams H, Barrett DA, Hardy ICW. Sustenance and Performance: Nutritional Reserves, Longevity, and Contest Outcomes of Fed and Starved Adult Parasitoid Wasps. Front Ecol Evol 2018. [DOI: 10.3389/fevo.2018.00012] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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46
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Pollard AK, Ortori CA, Stöger R, Barrett DA, Chakrabarti L. Mouse mitochondrial lipid composition is defined by age in brain and muscle. Aging (Albany NY) 2017; 9:986-998. [PMID: 28325886 PMCID: PMC5391243 DOI: 10.18632/aging.101204] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2016] [Accepted: 03/12/2017] [Indexed: 01/22/2023]
Abstract
Functionality of the lipid rich mitochondrial organelle declines with increased age. Recent advances in lipidomic technologies allowed us to perform a global characterisation of lipid composition in two different tissue types and age ranges. Ultra-high performance liquid chromatography coupled with high resolution mass spectrometry was used to establish and compare mitochondrial lipidomes of brain and skeletal muscle from young (4-11 weeks old) and middle age (78 weeks old) healthy mice. In middle age the brain mitochondria had reduced levels of fatty acids, particularly polyunsaturated fatty acids, while skeletal muscle mitochondria had a decreased abundance of phosphatidylethanolamine, but a pronounced increase of triglyceride levels. Reduced levels of phosphatidylethanolamines are known to decrease mitochondrial membrane fluidity and are connected with accelerated ageing. In mitochondria from skeletal muscle we propose that increased age causes a metabolic shift in the conversion of diacylglycerol so that triglycerides predominate compared with phosphatidylethanolamines. This is the first time mitochondrial lipid content in normal healthy mammalian ageing brain and muscle has been catalogued in such detail across all lipid classes. We identify distinct mitochondrial lipid signatures that change with age, revealing tissue-specific lipid pathways as possible targets to ameliorate ageing-related mitochondrial decline.
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Affiliation(s)
- Amelia K Pollard
- School of Veterinary Medicine and Science, University of Nottingham, Sutton Bonington, LE12 5RD, UK
| | - Catharine A Ortori
- Centre for Analytical Bioscience, School of Pharmacy, University of Nottingham, NG7 2RD, UK
| | - Reinhard Stöger
- Division of Animal Science, School of Biosciences, University of Nottingham, LE12 5RD, UK
| | - David A Barrett
- Centre for Analytical Bioscience, School of Pharmacy, University of Nottingham, NG7 2RD, UK
| | - Lisa Chakrabarti
- School of Veterinary Medicine and Science, University of Nottingham, Sutton Bonington, LE12 5RD, UK
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47
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Barr HL, Halliday N, Barrett DA, Williams P, Forrester DL, Peckham D, Williams K, Smyth AR, Honeybourne D, Whitehouse JL, Nash EF, Dewar J, Clayton A, Knox AJ, Cámara M, Fogarty AW. Diagnostic and prognostic significance of systemic alkyl quinolones for P. aeruginosa in cystic fibrosis: A longitudinal study; response to comments. J Cyst Fibros 2017; 16:e21. [PMID: 29079141 DOI: 10.1016/j.jcf.2017.09.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2017] [Accepted: 09/22/2017] [Indexed: 11/30/2022]
Affiliation(s)
- H L Barr
- Division of Respiratory Medicine, University of Nottingham, City Hospital Campus, Nottingham, UK.
| | - N Halliday
- School of Life Sciences, Centre for Biomolecular Sciences, University of Nottingham, Nottingham, UK
| | - D A Barrett
- Centre for Analytical Bioscience, School of Pharmacy, University of Nottingham, Nottingham, UK
| | - P Williams
- School of Life Sciences, Centre for Biomolecular Sciences, University of Nottingham, Nottingham, UK
| | - D L Forrester
- Division of Respiratory Medicine, University of Nottingham, City Hospital Campus, Nottingham, UK
| | - D Peckham
- Leeds Adult Cystic Fibrosis Centre, St James's University Hospital, Leeds, UK
| | - K Williams
- Leeds Adult Cystic Fibrosis Centre, St James's University Hospital, Leeds, UK
| | - A R Smyth
- Division of Child Health, Obstetrics and Gynaecology, University of Nottingham, UK
| | - D Honeybourne
- West Midlands Adult CF Centre, Heart of England, NHS Foundation Trust, Birmingham, UK
| | - J L Whitehouse
- West Midlands Adult CF Centre, Heart of England, NHS Foundation Trust, Birmingham, UK
| | - E F Nash
- West Midlands Adult CF Centre, Heart of England, NHS Foundation Trust, Birmingham, UK
| | - J Dewar
- Wolfson Cystic Fibrosis Centre, Department of Respiratory Medicine, Nottingham University Hospitals NHS Trust, Nottingham, UK
| | - A Clayton
- Wolfson Cystic Fibrosis Centre, Department of Respiratory Medicine, Nottingham University Hospitals NHS Trust, Nottingham, UK
| | - A J Knox
- Division of Respiratory Medicine, University of Nottingham, City Hospital Campus, Nottingham, UK
| | - M Cámara
- School of Life Sciences, Centre for Biomolecular Sciences, University of Nottingham, Nottingham, UK
| | - A W Fogarty
- Division of Epidemiology and Public Health, University of Nottingham, Clinical Sciences Building, University of Nottingham, Nottingham, UK
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48
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Huang J, Burston JJ, Li L, Ashraf S, Mapp PI, Bennett AJ, Ravipati S, Pousinis P, Barrett DA, Scammell BE, Chapman V. Targeting the D Series Resolvin Receptor System for the Treatment of Osteoarthritis Pain. Arthritis Rheumatol 2017; 69:996-1008. [PMID: 27860453 PMCID: PMC5763389 DOI: 10.1002/art.40001] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2016] [Accepted: 11/10/2016] [Indexed: 12/26/2022]
Abstract
Objective Pain is a major symptom of osteoarthritis (OA); currently available analgesics either do not provide adequate pain relief or are associated with serious side effects. The aim of this study was to investigate the therapeutic potential of targeting the resolvin receptor system to modify OA pain and pathology. Methods Gene expression of 2 resolvin receptors (ALX and ChemR23) was quantified in synovium and medial tibial plateau specimens obtained from patients with OA at the time of joint replacement surgery. Two models of OA joint pain were used for the mechanistic studies. Gene expression in the joint and central nervous system was quantified. The effects of exogenous administration of the D series resolvin precursor 17(R)‐hydroxy‐docosahexaenoic acid (17[R]‐HDoHE) on pain behavior, joint pathology, spinal microglia, and astroglyosis were quantified. Plasma levels of relevant lipids, resolvin D2, 17(R)‐HDoHE, and arachidonic acid, were determined in rats, using liquid chromatography tandem mass spectrometry. Results There was a positive correlation between resolvin receptor and interleukin‐6 (IL‐6) expression in human OA synovial and medial tibial plateau tissue. In rats, synovial expression of ALX was positively correlated with expression of IL‐1β, tumor necrosis factor, and cyclooxygenase 2. Treatment with 17(R)‐HDoHE reversed established pain behavior (but not joint pathology) in 2 models of OA pain. This was associated with a significant elevation in the plasma levels of resolvin D2 and a significant reduction in astrogliosis in the spinal cord in the monosodium iodoacetate–induced OA rat model. Conclusion Our preclinical data demonstrate the robust analgesic effects of activation of the D series resolvin pathways in 2 different animal models of OA. Our data support a predominant central mechanism of action in clinically relevant models of OA pain.
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Affiliation(s)
| | | | - Li Li
- University of Nottingham, Nottingham, UK
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Halliday M, Radford H, Zents KAM, Molloy C, Moreno JA, Verity NC, Smith E, Ortori CA, Barrett DA, Bushell M, Mallucci GR. Repurposed drugs targeting eIF2α-P-mediated translational repression prevent neurodegeneration in mice. Brain 2017; 140:1768-1783. [PMID: 28430857 PMCID: PMC5445255 DOI: 10.1093/brain/awx074] [Citation(s) in RCA: 192] [Impact Index Per Article: 27.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2016] [Revised: 12/21/2016] [Accepted: 01/31/2017] [Indexed: 01/06/2023] Open
Abstract
See Mercado and Hetz (doi:10.1093/brain/awx107) for a scientific commentary on this article.Signalling through the PERK/eIF2α-P branch of the unfolded protein response plays a critical role in controlling protein synthesis rates in cells. This pathway is overactivated in brains of patients with Alzheimer’s disease and related disorders and has recently emerged as a promising therapeutic target for these currently untreatable conditions. Thus, in mouse models of neurodegenerative disease, prolonged overactivation of PERK/eIF2α-P signalling causes sustained attenuation of protein synthesis, leading to memory impairment and neuronal loss. Re-establishing translation rates by inhibition of eIF2α-P activity, genetically or pharmacologically, restores memory and prevents neurodegeneration and extends survival. However, the experimental compounds used preclinically are unsuitable for use in humans, due to associated toxicity or poor pharmacokinetic properties. To discover compounds that have anti-eIF2α-P activity suitable for clinical use, we performed phenotypic screens on a NINDS small molecule library of 1040 drugs. We identified two compounds, trazodone hydrochloride and dibenzoylmethane, which reversed eIF2α-P-mediated translational attenuation in vitro and in vivo. Both drugs were markedly neuroprotective in two mouse models of neurodegeneration, using clinically relevant doses over a prolonged period of time, without systemic toxicity. Thus, in prion-diseased mice, both trazodone and dibenzoylmethane treatment restored memory deficits, abrogated development of neurological signs, prevented neurodegeneration and significantly prolonged survival. In tauopathy-frontotemporal dementia mice, both drugs were neuroprotective, rescued memory deficits and reduced hippocampal atrophy. Further, trazodone reduced p-tau burden. These compounds therefore represent potential new disease-modifying treatments for dementia. Trazodone in particular, a licensed drug, should now be tested in clinical trials in patients.
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Affiliation(s)
- Mark Halliday
- MRC Toxicology Unit, Hodgkin Building, Lancaster Road, Leicester LE1 9HN, UK
| | - Helois Radford
- MRC Toxicology Unit, Hodgkin Building, Lancaster Road, Leicester LE1 9HN, UK
| | - Karlijn A M Zents
- Department of Clinical Neurosciences, University of Cambridge, Cambridge Biomedical Campus, Cambridge, CB2 0AH, UK
| | - Collin Molloy
- MRC Toxicology Unit, Hodgkin Building, Lancaster Road, Leicester LE1 9HN, UK
| | - Julie A Moreno
- MRC Toxicology Unit, Hodgkin Building, Lancaster Road, Leicester LE1 9HN, UK
| | - Nicholas C Verity
- MRC Toxicology Unit, Hodgkin Building, Lancaster Road, Leicester LE1 9HN, UK
| | - Ewan Smith
- MRC Toxicology Unit, Hodgkin Building, Lancaster Road, Leicester LE1 9HN, UK
| | - Catharine A Ortori
- Centre for Analytical Bioscience, School of Pharmacy, University of Nottingham, Nottingham NG7 2RD, UK
| | - David A Barrett
- Centre for Analytical Bioscience, School of Pharmacy, University of Nottingham, Nottingham NG7 2RD, UK
| | - Martin Bushell
- MRC Toxicology Unit, Hodgkin Building, Lancaster Road, Leicester LE1 9HN, UK
| | - Giovanna R Mallucci
- MRC Toxicology Unit, Hodgkin Building, Lancaster Road, Leicester LE1 9HN, UK
- Department of Clinical Neurosciences, University of Cambridge, Cambridge Biomedical Campus, Cambridge, CB2 0AH, UK
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Abdelrazig S, Ortori CA, Davey G, Deressa W, Mulleta D, Barrett DA, Amberbir A, Fogarty AW. A metabolomic analytical approach permits identification of urinary biomarkers for Plasmodium falciparum infection: a case-control study. Malar J 2017; 16:229. [PMID: 28558710 PMCID: PMC5450092 DOI: 10.1186/s12936-017-1875-z] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2016] [Accepted: 05/25/2017] [Indexed: 12/25/2022] Open
Abstract
BACKGROUND Currently available diagnostic techniques of Plasmodium falciparum infection are not optimal for non-invasive, population-based screening for malaria. It was hypothesized that a mass spectrometry-based metabolomics approach could identify urinary biomarkers of falciparum malaria. METHODS The study used a case-control design, with cases consisting of 21 adults in central Ethiopia with a diagnosis of P. falciparum infection confirmed with microscopy, and 25 controls of adults with negative blood smears for malaria matched on age and sex. Urinary samples were collected from these individuals during presentation at the clinic, and a second sample was collected from both cases and controls 4 weeks later, after the cases had received anti-malarial medication. The urine samples were screened for small molecule urinary biomarkers, using mass spectrometry-based metabolomics analyses followed by multivariate analysis using principal component analysis and orthogonal partial least square-discriminant analysis. The chemical identity of statistically significant malaria biomarkers was confirmed using tandem mass spectrometry. RESULTS The urinary metabolic profiles of cases with P. falciparum infection were distinct from healthy controls. After treatment with anti-malarial medication, the metabolomic profile of cases resembled that of healthy controls. Significantly altered levels of 29 urinary metabolites were found. Elevated levels of urinary pipecolic acid, taurine, N-acetylspermidine, N-acetylputrescine and 1,3-diacetylpropane were identified as potential biomarkers of falciparum malaria. CONCLUSION The urinary biomarkers of malaria identified have potential for the development of non-invasive and rapid diagnostic test of P. falciparum infection.
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Affiliation(s)
- Salah Abdelrazig
- Centre for Analytical Bioscience, School of Pharmacy, University of Nottingham, Nottingham, NG7 2RD, UK
| | - Catharine A Ortori
- Centre for Analytical Bioscience, School of Pharmacy, University of Nottingham, Nottingham, NG7 2RD, UK
| | - Gail Davey
- Wellcome Trust Centre for Global Health Research, Brighton and Sussex Medical School, Brighton, UK
| | - Wakgari Deressa
- Department of Preventive Medicine, School of Public Health, College of Health Sciences, Addis Ababa University, Addis Ababa, Ethiopia.
| | - Dhaba Mulleta
- East Shewa Zone Health Department, Oromia Regional State, Adama, Ethiopia
| | - David A Barrett
- Centre for Analytical Bioscience, School of Pharmacy, University of Nottingham, Nottingham, NG7 2RD, UK
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