1
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Nguyen TM, Pombubpa N, Huntemann M, Clum A, Foster B, Foster B, Roux S, Palaniappan K, Varghese N, Mukherjee S, Reddy TBK, Daum C, Copeland A, Chen IMA, Ivanova NN, Kyrpides NC, Harmon-Smith M, Eloe-Fadrosh EA, Pietrasiak N, Stajich JE, Hom EFY. Whole community shotgun metagenomes of two biological soil crust types from the Mojave Desert. Microbiol Resour Announc 2024; 13:e0098023. [PMID: 38329355 DOI: 10.1128/mra.00980-23] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Accepted: 01/23/2024] [Indexed: 02/09/2024] Open
Abstract
We present six whole community shotgun metagenomic sequencing data sets of two types of biological soil crusts sampled at the ecotone of the Mojave Desert and Colorado Desert in California. These data will help us understand the diversity and function of biocrust microbial communities, which are essential for desert ecosystems.
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Affiliation(s)
- Thuy M Nguyen
- Department of Biology and Center for Biodiversity and Conservation Research, University of Mississippi, University, Mississippi, USA
| | - Nuttapon Pombubpa
- Department of Microbiology and Plant Pathology, University of California, Riverside, California, USA
| | - Marcel Huntemann
- US Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | - Alicia Clum
- US Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | - Brian Foster
- US Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | - Bryce Foster
- US Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | - Simon Roux
- US Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | - Krishnaveni Palaniappan
- US Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | - Neha Varghese
- US Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | - Supratim Mukherjee
- US Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | - T B K Reddy
- US Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | - Chris Daum
- US Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | - Alex Copeland
- US Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | - I-Min A Chen
- US Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | - Natalia N Ivanova
- US Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | - Nikos C Kyrpides
- US Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | - Miranda Harmon-Smith
- US Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | - Emiley A Eloe-Fadrosh
- US Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | - Nicole Pietrasiak
- School of Life Sciences, University of Nevada-Las Vegas, Las Vegas, Nevada, USA
| | - Jason E Stajich
- Department of Microbiology and Plant Pathology, University of California, Riverside, California, USA
| | - Erik F Y Hom
- Department of Biology and Center for Biodiversity and Conservation Research, University of Mississippi, University, Mississippi, USA
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2
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Nualdaisri P, Corlett SA, Krska J. Patient information leaflets and package inserts of ibuprofen provided in the UK and Thailand: a comparative assessment. Int J Pharm Pract 2024:riae007. [PMID: 38442896 DOI: 10.1093/ijpp/riae007] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Accepted: 02/22/2024] [Indexed: 03/07/2024]
Abstract
OBJECTIVES Written medicine information (WMI) is important for ensuring patients understand and use their medicines optimally, but relatively little research has assessed the quality of available WMI. This study assessed the quality of WMI using a sample of leaflets for ibuprofen in the UK and Thailand. METHODS Leaflets were obtained by purchasing a product from retail outlets or community pharmacies, 18 from each country. In the UK, these were patient information leaflets (PILs); in Thailand, they were package inserts PIs not specifically designed for patients. Leaflets were assessed for content, layout, and readability using standard methods and compared to relevant guidelines. KEY FINDINGS The UK PILs were uniform and conformed to EU regulatory requirements for content, whereas Thai PIs varied considerably, many failing to include important information required by Thai regulations. Several forms of Thai PIs were found, including some very short leaflets, containing minimal information. The readability of both was rated as poor, all used small font size and had less than desirable white space. Fewer Thai PIs than UK PILs met the Keystone Criteria for ibuprofen. CONCLUSIONS The extent of variation in format and content of Thai WMI could potentially cause confusion and reduce willingness to read it. PILs, conforming to Thai regulatory guidelines, should be provided with medicines instead. Leaflets in both countries would benefit from improved readability and layout.
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Affiliation(s)
- Pitchaya Nualdaisri
- Faculty of Pharmaceutical Sciences, Prince of Songkla University, Hat Yai, Thailand
- Medway School of Pharmacy, Universities of Kent and Greenwich, Chatham Maritime, Kent, United Kingdom
| | - Sarah A Corlett
- Medway School of Pharmacy, Universities of Kent and Greenwich, Chatham Maritime, Kent, United Kingdom
- Pharmacy Department, Medway Foundation NHS Trust, Kent, United Kingdom
| | - Janet Krska
- Medway School of Pharmacy, Universities of Kent and Greenwich, Chatham Maritime, Kent, United Kingdom
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3
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Nguyen TM, Pombubpa N, Huntemann M, Clum A, Foster B, Foster B, Roux S, Palaniappan K, Varghese N, Mukherjee S, Reddy TBK, Daum C, Copeland A, Chen IMA, Ivanova NN, Kyrpides NC, Harmon-Smith M, Eloe-Fadrosh EA, Pietrasiak N, Stajich JE, Hom EFY. Metatranscriptomes of two biological soil crust types from the Mojave desert in response to wetting. Microbiol Resour Announc 2024; 13:e0108023. [PMID: 38189307 PMCID: PMC10868201 DOI: 10.1128/mra.01080-23] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Accepted: 12/13/2023] [Indexed: 01/09/2024] Open
Abstract
We present eight metatranscriptomic datasets of light algal and cyanolichen biological soil crusts from the Mojave Desert in response to wetting. These data will help us understand gene expression patterns in desert biocrust microbial communities after they have been reactivated by the addition of water.
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Affiliation(s)
- Thuy M. Nguyen
- Department of Biology and Center for Biodiversity and Conservation Research, University, University of Mississippi, Mississippi, USA
| | - Nuttapon Pombubpa
- Department of Microbiology and Plant Pathology, University of California, Riverside, California, USA
| | - Marcel Huntemann
- US Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | - Alicia Clum
- US Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | - Brian Foster
- US Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | - Bryce Foster
- US Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | - Simon Roux
- US Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | - Krishnaveni Palaniappan
- US Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | - Neha Varghese
- US Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | - Supratim Mukherjee
- US Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | - T. B. K. Reddy
- US Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | - Chris Daum
- US Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | - Alex Copeland
- US Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | - I-Min A. Chen
- US Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | - Natalia N. Ivanova
- US Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | - Nikos C. Kyrpides
- US Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | - Miranda Harmon-Smith
- US Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | - Emiley A. Eloe-Fadrosh
- US Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | - Nicole Pietrasiak
- School of Life Sciences, University of Nevada-Las Vegas, Las Vegas, Nevada, USA
| | - Jason E. Stajich
- Department of Microbiology and Plant Pathology, University of California, Riverside, California, USA
| | - Erik F. Y. Hom
- Department of Biology and Center for Biodiversity and Conservation Research, University, University of Mississippi, Mississippi, USA
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4
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Srisawat K, Stead CA, Hesketh K, Pogson M, Strauss JA, Cocks M, Siekmann I, Phillips SM, Lisboa PJ, Shepherd S, Burniston JG. People with obesity exhibit losses in muscle proteostasis that are partly improved by exercise training. Proteomics 2023:e2300395. [PMID: 37963832 DOI: 10.1002/pmic.202300395] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Accepted: 11/03/2023] [Indexed: 11/16/2023]
Abstract
This pilot experiment examines if a loss in muscle proteostasis occurs in people with obesity and whether endurance exercise positively influences either the abundance profile or turnover rate of proteins in this population. Men with (n = 3) or without (n = 4) obesity were recruited and underwent a 14-d measurement protocol of daily deuterium oxide (D2 O) consumption and serial biopsies of vastus lateralis muscle. Men with obesity then completed 10-weeks of high-intensity interval training (HIIT), encompassing 3 sessions per week of cycle ergometer exercise with 1 min intervals at 100% maximum aerobic power interspersed by 1 min recovery periods. The number of intervals per session progressed from 4 to 8, and during weeks 8-10 the 14-d measurement protocol was repeated. Proteomic analysis detected 352 differences (p < 0.05, false discovery rate < 5%) in protein abundance and 19 (p < 0.05) differences in protein turnover, including components of the ubiquitin-proteasome system. HIIT altered the abundance of 53 proteins and increased the turnover rate of 22 proteins (p < 0.05) and tended to benefit proteostasis by increasing muscle protein turnover rates. Obesity and insulin resistance are associated with compromised muscle proteostasis, which may be partially restored by endurance exercise.
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Affiliation(s)
| | - Connor A Stead
- Research Institute for Sport, & Exercise Sciences, Liverpool, UK
| | - Katie Hesketh
- Research Institute for Sport, & Exercise Sciences, Liverpool, UK
| | - Mark Pogson
- Research Institute for Sport, & Exercise Sciences, Liverpool, UK
| | | | - Matt Cocks
- Research Institute for Sport, & Exercise Sciences, Liverpool, UK
| | - Ivo Siekmann
- Department of Applied Mathematics, Liverpool John Moores University, Liverpool, UK
| | - Stuart M Phillips
- Department of Kinesiology, McMaster University, Hamilton, Ontario, Canada
| | - Paulo J Lisboa
- Department of Applied Mathematics, Liverpool John Moores University, Liverpool, UK
| | - Sam Shepherd
- Research Institute for Sport, & Exercise Sciences, Liverpool, UK
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5
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Songsri S, Harkiss AH, Sutherland A. Synthesis and Photophysical Properties of Charge-Transfer-Based Pyrimidine-Derived α-Amino Acids. J Org Chem 2023; 88:13214-13224. [PMID: 37621156 PMCID: PMC10507667 DOI: 10.1021/acs.joc.3c01437] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Indexed: 08/26/2023]
Abstract
The four-step synthesis of fluorescent pyrimidine-derived α-amino acids from an l-aspartic acid derivative is described. The key synthetic steps involved preparation of ynone intermediates via the reaction of alkynyl lithium salts with a Weinreb amide, followed by an ytterbium-catalyzed heterocyclization reaction with amidines. Variation of substituents at the C2- and C4-position of the pyrimidine ring allowed tuning of the photoluminescent properties of the α-amino acids. This revealed that a combination of highly conjugated or electron-rich aryl substituents with the π-deficient pyrimidine motif resulted in fluorophores with the highest quantum yields and overall brightness. Further analysis of the most fluorogenic α-amino acid demonstrated solvatochromism and sensitivity to pH.
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Affiliation(s)
- Sineenard Songsri
- School of Chemistry, The Joseph Black Building, University of Glasgow, Glasgow G12 8QQ, United Kingdom
| | - Alexander H. Harkiss
- School of Chemistry, The Joseph Black Building, University of Glasgow, Glasgow G12 8QQ, United Kingdom
| | - Andrew Sutherland
- School of Chemistry, The Joseph Black Building, University of Glasgow, Glasgow G12 8QQ, United Kingdom
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6
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Andajani S, Chanthasukh S, Fairbairn-Dunlop P, Smith JF. Community pharmacists' roles in providing contraceptive services: views and experiences of adolescents in urban Khon Kaen, Northeast Thailand. Int J Pharm Pract 2023; 31:276-281. [PMID: 37011091 DOI: 10.1093/ijpp/riad011] [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: 09/27/2021] [Accepted: 03/23/2023] [Indexed: 04/05/2023]
Abstract
OBJECTIVES Adolescent pregnancy is a national public health priority in Thailand. While contraceptive methods are available to prevent adolescent pregnancy, Thai adolescent contraceptive usage is low. Community pharmacists are likely the first health professionals to contact adolescents engaged in unprotected sex and needing emergency contraception. However, there is limited research on Thai pharmacists' roles in promoting sexual and reproductive health. This study examines Thai adolescents' perspectives on community pharmacists' roles in promoting contraceptives and preventing unwanted pregnancies. METHOD This qualitative study recruited 38 adolescents aged 15-19 from one vocational school and one secondary school in Khon Kaen, Thailand. Data were collected from focus group discussions and in-depth interviews and analysed using thematic analysis. KEY FINDINGS Participants felt community pharmacists had potentially critical roles in promoting adolescent contraceptive use. Community pharmacists had relevant knowledge of effective contraceptive methods, the risks and benefits of each method, and the quality of different condoms available. Community pharmacists, at times, also provided emotional support to distressed adolescents who came to their store. However, participants reported pharmacists' age, gender, and non-empathetic and judgemental attitudes could be barriers to adolescents' ease of access to contraceptive services. CONCLUSION This study highlights the potentially crucial role community pharmacists could play in providing contraceptive information for adolescents. It suggests the need for changes in government policies and education and training of community pharmacists to enhance their soft skills - empathetic and non-judgemental attitudes - and their roles in delivering youth-friendly sexual and reproductive health services.
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Affiliation(s)
- Sari Andajani
- Department of Public Health, Auckland University of Technology, Auckland, New Zealand
| | | | - Peggy Fairbairn-Dunlop
- Emeritus Professor of Pacific Studies, Auckland University of Technology, Auckland, New Zealand
| | - John F Smith
- Division of Research & International Relations Affairs, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
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7
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Hassell-Hart S, Speranzini E, Srikwanjai S, Hossack E, Roe SM, Fearon D, Akinbosede D, Hare S, Spencer J. Synthesis of a Thiazole Library via an Iridium-Catalyzed Sulfur Ylide Insertion Reaction. Org Lett 2022; 24:7924-7927. [PMID: 36265082 PMCID: PMC9641659 DOI: 10.1021/acs.orglett.2c02996] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [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: 09/03/2022] [Indexed: 11/29/2022]
Abstract
A library of thiazoles and selenothiazoles were synthesized via Ir-catalyzed ylide insertion chemistry. This process is a functional group, particularly heterocycle-substituent tolerant. This was applied to the synthesis of fanetizole, an anti-inflammatory drug, and a thiazole-containing drug fragment that binds to the peptidyl-tRNA hydrolase (Pth) in Neisseria gonorrheae bacteria.
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Affiliation(s)
- Storm Hassell-Hart
- Department
of Chemistry, School of Life Sciences, University
of Sussex, Brighton BN1 9QJ, U.K.
| | - Elisa Speranzini
- Department
of Chemistry, School of Life Sciences, University
of Sussex, Brighton BN1 9QJ, U.K.
| | - Sirihathai Srikwanjai
- Department
of Chemistry, School of Life Sciences, University
of Sussex, Brighton BN1 9QJ, U.K.
| | - Euan Hossack
- Department
of Biochemistry, School of Life Sciences, University of Sussex, Brighton BN1 9QG, U.K.
| | - S. Mark Roe
- Department
of Biochemistry, School of Life Sciences, University of Sussex, Brighton BN1 9QG, U.K.
| | - Daren Fearon
- Diamond
LightSource (DLS), Harwell Science and Innovation Campus, Didcot OX11 0DE, U.K.
| | - Daniel Akinbosede
- Department
of Biochemistry, School of Life Sciences, University of Sussex, Brighton BN1 9QG, U.K.
| | - Stephen Hare
- Department
of Biochemistry, School of Life Sciences, University of Sussex, Brighton BN1 9QG, U.K.
| | - John Spencer
- Department
of Chemistry, School of Life Sciences, University
of Sussex, Brighton BN1 9QJ, U.K.
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8
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Khiaophong W, Jaroensan J, Kachangoon R, Vichapong J, Burakham R, Santaladchaiyakit Y, Srijaranai S. Modified Peanut Shell as an Eco-Friendly Biosorbent for Effective Extraction of Triazole Fungicide Residues in Surface Water and Honey Samples before Their Determination by High-Performance Liquid Chromatography. ACS Omega 2022; 7:34877-34887. [PMID: 36211057 PMCID: PMC9535652 DOI: 10.1021/acsomega.2c03410] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Accepted: 09/08/2022] [Indexed: 06/16/2023]
Abstract
An eco-friendly sample preparation method that is based on the use of a modified peanut shell as an efficient biosorbent for the extraction of triazole residues before their analysis by high-performance liquid chromatography was reported. The four triazole fungicides were separated on a Purospher STAR RP-18 endcapped (4.6 × 150 mm, 5 μm) column with a mobile phase of 50% (v/v) acetonitrile at a flow rate of 1.0 mL min-1 and detection wavelength set at 220 nm. Peanut shells modified by didodecyldimethylammonium bromide were selected as an effective biosorbent material in the microextraction method. Scanning electron microscopy, transmission electron microscopy, and Fourier transform infrared spectroscopy were used to characterize the biosorbent. The effect of dominant parameters on the proposed microextraction method including the amount of sorbent, kind and concentration of surfactant, sodium hydroxide concentration, kind and amount of salt, sample volume, adsorption time, kind and volume desorption solvent, and desorption time was studied. Under the optimum condition, a good analytical performance for the proposed microextraction method was obtained with a wide linear range within the range of 9-1000 μg L-1, and low limits of detection (0.03 μg L-1 for all analytes) were obtained. Enrichment factors were achieved within the range of 30-51. The intra and interday precision values were evaluated in terms of percentage relative standard deviations (%RSD) and were less than 0.09 and 5.34% for the retention time and peak area, respectively. The proposed microextraction methods were used for extraction and analysis of triazole fungicides in water and honey samples. The recoveries in a satisfactory range of 70.0-118.8% were obtained.
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Affiliation(s)
- Wannipha Khiaophong
- Creative
Chemistry and Innovation Research Unit, Department of Chemistry and
Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahasarakham University, Maha Sarakham 44150, Thailand
| | - Jedsada Jaroensan
- Creative
Chemistry and Innovation Research Unit, Department of Chemistry and
Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahasarakham University, Maha Sarakham 44150, Thailand
| | - Rawikan Kachangoon
- Creative
Chemistry and Innovation Research Unit, Department of Chemistry and
Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahasarakham University, Maha Sarakham 44150, Thailand
| | - Jitlada Vichapong
- Creative
Chemistry and Innovation Research Unit, Department of Chemistry and
Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahasarakham University, Maha Sarakham 44150, Thailand
- Multidisciplinary
Research Unit of Pure and Applied Chemistry (MRUPAC), Department of
Chemistry and Center of Excellent for Innovation in Chemistry, Faculty
of Science, Mahasarakham University, Maha Sarakham 44150, Thailand
| | - Rodjana Burakham
- Materials
Chemistry Research Center, Department of Chemistry and Center of Excellence
for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Yanawath Santaladchaiyakit
- Department
of Chemistry, Faculty of Engineering, Rajamangala
University of Technology Isan, Khon Kaen Campus, Khon Kaen 40000, Thailand
| | - Supalax Srijaranai
- Materials
Chemistry Research Center, Department of Chemistry and Center of Excellence
for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand
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9
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Morris P, García-Arrazola R, Rios-Solis L, Dalby PA. Biophysical characterization of the inactivation of E. coli transketolase by aqueous co-solvents. Sci Rep 2021; 11:23584. [PMID: 34880340 PMCID: PMC8654844 DOI: 10.1038/s41598-021-03001-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 09/21/2021] [Accepted: 11/24/2021] [Indexed: 11/09/2022] Open
Abstract
Transketolase (TK) has been previously engineered, using semi-rational directed evolution and substrate walking, to accept increasingly aliphatic, cyclic, and then aromatic substrates. This has ultimately led to the poor water solubility of new substrates, as a potential bottleneck to further exploitation of this enzyme in biocatalysis. Here we used a range of biophysical studies to characterise the response of both E. coli apo- and holo-TK activity and structure to a range of polar organic co-solvents: acetonitrile (AcCN), n-butanol (nBuOH), ethyl acetate (EtOAc), isopropanol (iPrOH), and tetrahydrofuran (THF). The mechanism of enzyme deactivation was found to be predominantly via solvent-induced local unfolding. Holo-TK is thermodynamically more stable than apo-TK and yet for four of the five co-solvents it retained less activity than apo-TK after exposure to organic solvents, indicating that solvent tolerance was not simply correlated to global conformational stability. The co-solvent concentrations required for complete enzyme inactivation was inversely proportional to co-solvent log(P), while the unfolding rate was directly proportional, indicating that the solvents interact with and partially unfold the enzyme through hydrophobic contacts. Small amounts of aggregate formed in some cases, but this was not sufficient to explain the enzyme inactivation. TK was found to be tolerant to 15% (v/v) iPrOH, 10% (v/v) AcCN, or 6% (v/v) nBuOH over 3 h. This work indicates that future attempts to engineer the enzyme to better tolerate co-solvents should focus on increasing the stability of the protein to local unfolding, particularly in and around the cofactor-binding loops.
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Affiliation(s)
- Phattaraporn Morris
- Department of Biochemical Engineering, University College London, Bernard Katz Building, Gower Street, London, WC1E 6BT, UK
- Chemical Metrology and Biometry Department, National Institute of Metrology, 3/4-5 Moo 3, Klong 5, Klong Luang, 12120, Pathumthani, Thailand
| | - Ribia García-Arrazola
- Department of Biochemical Engineering, University College London, Bernard Katz Building, Gower Street, London, WC1E 6BT, UK
| | - Leonardo Rios-Solis
- Institute for Bioengineering, School of Engineering, University of Edinburgh, Edinburgh, EH9 3JL, UK
- Centre for Synthetic and Systems Biology (SynthSys), University of Edinburgh, King's Buildings, Edinburgh, EH9 3JL, UK
| | - Paul A Dalby
- Department of Biochemical Engineering, University College London, Bernard Katz Building, Gower Street, London, WC1E 6BT, UK.
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10
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Saengjaroentham C, Strother LC, Dripps I, Sultan Jabir MR, Pradhan A, Goadsby PJ, Holland PR. Differential medication overuse risk of novel anti-migraine therapeutics. Brain 2020; 143:2681-2688. [PMID: 32810212 PMCID: PMC7523700 DOI: 10.1093/brain/awaa211] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [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: 12/20/2019] [Revised: 04/07/2020] [Accepted: 05/03/2020] [Indexed: 01/16/2023] Open
Abstract
Medication overuse headache is estimated to affect 2% of the population, and is ranked in the top 20 most disabling disorders due to its high level of disability. Several therapies used in the treatment of acute migraine are thought to be associated with medication overuse headache, including opioids and triptans. With limited treatment options, it is critical to determine the risk profile of novel therapies prior to their widespread use. The current study explores the potential medication overuse risk of two novel therapeutic drug classes, namely the ditans: 5-HT1F receptor agonists, and the gepants: calcitonin gene-related peptide receptor antagonists, in a preclinical model of medication overuse. Persistent exposure of mice to the 5-HT1F agonist LY344864, but not olcegepant produced a significant reduction in hind paw and orofacial mechanical withdrawal thresholds as a surrogate readout of allodynia. In agreement, only LY344864 induced neuroplastic changes in trigeminal sensory afferents, increasing calcitonin gene-related peptide expression and basal trigeminal nociception. Our data highlight a differential medication overuse headache risk profile for the ditan and gepant classes of drugs that has important implications for their clinical use and patient education to help reduce the burden of medication overuse headache.
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Affiliation(s)
- Chonlawan Saengjaroentham
- Headache Group, Basic and Clinical Neuroscience, Institute of Psychiatry, Psychology and Neuroscience, King’s College London, London, UK
| | - Lauren C Strother
- Headache Group, Basic and Clinical Neuroscience, Institute of Psychiatry, Psychology and Neuroscience, King’s College London, London, UK
| | - Isaac Dripps
- Department of Psychiatry, University of Illinois at Chicago, Chicago, USA
| | - Mohammad Rayhan Sultan Jabir
- Headache Group, Basic and Clinical Neuroscience, Institute of Psychiatry, Psychology and Neuroscience, King’s College London, London, UK
| | - Amynah Pradhan
- Department of Psychiatry, University of Illinois at Chicago, Chicago, USA
| | - Peter J Goadsby
- Headache Group, Basic and Clinical Neuroscience, Institute of Psychiatry, Psychology and Neuroscience, King’s College London, London, UK
| | - Philip R Holland
- Headache Group, Basic and Clinical Neuroscience, Institute of Psychiatry, Psychology and Neuroscience, King’s College London, London, UK
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Shellard PM, Srisubin T, Hartmann M, Butcher J, Fei F, Cox H, McNamara TP, McArdle T, Shepherd AM, Jacobs RMJ, Waigh TA, Flitsch SL, Blanford CF. A versatile route to edge-specific modifications to pristine graphene by electrophilic aromatic substitution. J Mater Sci 2020; 55:10284-10302. [PMID: 32536720 PMCID: PMC7266800 DOI: 10.1007/s10853-020-04662-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Accepted: 04/07/2020] [Indexed: 06/11/2023]
Abstract
Electrophilic aromatic substitution produces edge-specific modifications to CVD graphene and graphene nanoplatelets that are suitable for specific attachment of biomolecules.
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Affiliation(s)
- Philippa M. Shellard
- Department of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL UK
- Manchester Institute of Biotechnology, University of Manchester, 131 Princess Street, Manchester, M1 7DN UK
| | - Thunyaporn Srisubin
- Manchester Institute of Biotechnology, University of Manchester, 131 Princess Street, Manchester, M1 7DN UK
- Department of Materials, University of Manchester, Oxford Road, Manchester, M13 9PL UK
| | - Mirja Hartmann
- Department of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL UK
- Manchester Institute of Biotechnology, University of Manchester, 131 Princess Street, Manchester, M1 7DN UK
| | - Joseph Butcher
- Department of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL UK
- Manchester Institute of Biotechnology, University of Manchester, 131 Princess Street, Manchester, M1 7DN UK
| | - Fan Fei
- Manchester Institute of Biotechnology, University of Manchester, 131 Princess Street, Manchester, M1 7DN UK
- Department of Materials, University of Manchester, Oxford Road, Manchester, M13 9PL UK
| | - Henry Cox
- Biological Physics, Department of Physics and Astronomy, University of Manchester, Oxford Road, Manchester, M13 9PL UK
- Photon Science Institute, University of Manchester, Alan Turing Building, Oxford Road, Manchester, M13 9PL UK
| | - Thomas P. McNamara
- Manchester Institute of Biotechnology, University of Manchester, 131 Princess Street, Manchester, M1 7DN UK
- Department of Materials, University of Manchester, Oxford Road, Manchester, M13 9PL UK
| | - Trevor McArdle
- Manchester Institute of Biotechnology, University of Manchester, 131 Princess Street, Manchester, M1 7DN UK
- Department of Materials, University of Manchester, Oxford Road, Manchester, M13 9PL UK
| | - Ashley M. Shepherd
- Chemical Research Laboratory, Department of Chemistry, University of Oxford, 12 Mansfield Road, Oxford, OX1 3TA UK
| | - Robert M. J. Jacobs
- Chemical Research Laboratory, Department of Chemistry, University of Oxford, 12 Mansfield Road, Oxford, OX1 3TA UK
| | - Thomas A. Waigh
- Biological Physics, Department of Physics and Astronomy, University of Manchester, Oxford Road, Manchester, M13 9PL UK
- Photon Science Institute, University of Manchester, Alan Turing Building, Oxford Road, Manchester, M13 9PL UK
| | - Sabine L. Flitsch
- Department of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL UK
- Manchester Institute of Biotechnology, University of Manchester, 131 Princess Street, Manchester, M1 7DN UK
| | - Christopher F. Blanford
- Manchester Institute of Biotechnology, University of Manchester, 131 Princess Street, Manchester, M1 7DN UK
- Department of Materials, University of Manchester, Oxford Road, Manchester, M13 9PL UK
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Azad A, Poloni G, Sontayananon N, Jiang H, Gehmlich K. The giant titin: how to evaluate its role in cardiomyopathies. J Muscle Res Cell Motil 2019; 40:159-167. [PMID: 31147888 PMCID: PMC6726704 DOI: 10.1007/s10974-019-09518-w] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [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: 04/17/2019] [Accepted: 05/28/2019] [Indexed: 01/02/2023]
Abstract
Titin, the largest protein known, has attracted a lot of interest in the cardiovascular field in recent years, since the discovery that truncating variants in titin are commonly found in patients with dilated cardiomyopathy. This review will discuss the contribution of variants in titin to inherited cardiac conditions (cardiomyopathies) and how model systems, such as animals and cellular systems, can help to provide insights into underlying disease mechanisms. It will also give an outlook onto exciting technological developments, such as in the field of CRISPR, which may facilitate future research on titin variants and their contributions to cardiomyopathies.
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Affiliation(s)
- Amar Azad
- Division of Cardiovascular Medicine, Radcliffe Department of Medicine and British Heart Foundation Centre of Research Excellence, University of Oxford, Oxford, OX3 9DU, UK
- Swansea University Medical School, Swansea, SA2 8PP, UK
| | - Giulia Poloni
- Division of Cardiovascular Medicine, Radcliffe Department of Medicine and British Heart Foundation Centre of Research Excellence, University of Oxford, Oxford, OX3 9DU, UK
| | - Naeramit Sontayananon
- Division of Cardiovascular Medicine, Radcliffe Department of Medicine and British Heart Foundation Centre of Research Excellence, University of Oxford, Oxford, OX3 9DU, UK
| | - He Jiang
- Division of Cardiovascular Medicine, Radcliffe Department of Medicine and British Heart Foundation Centre of Research Excellence, University of Oxford, Oxford, OX3 9DU, UK
| | - Katja Gehmlich
- Division of Cardiovascular Medicine, Radcliffe Department of Medicine and British Heart Foundation Centre of Research Excellence, University of Oxford, Oxford, OX3 9DU, UK.
- Institute of Cardiovascular Sciences, University of Birmingham, Birmingham, B15 2TT, UK.
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13
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Li Y, Boonprakob A, Gaonkar CC, Kooistra WHCF, Lange CB, Hernández-Becerril D, Chen Z, Moestrup Ø, Lundholm N. Diversity in the Globally Distributed Diatom Genus Chaetoceros (Bacillariophyceae): Three New Species from Warm-Temperate Waters. PLoS One 2017; 12:e0168887. [PMID: 28085887 PMCID: PMC5235366 DOI: 10.1371/journal.pone.0168887] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2016] [Accepted: 12/05/2016] [Indexed: 11/18/2022] Open
Abstract
Chaetoceros is one of the most species rich, widespread and abundant diatom genera in marine and brackish habitats worldwide. It therefore forms an excellent model for in-depth biodiversity studies, assessing morphological and genetic differentiation among groups of strains. The global Chaetoceros lorenzianus complex presently comprises three species known to science. However, our recent studies have shown that the group includes several previously unknown species. In this article, 50 strains, mainly from high latitudes and from warm-temperate waters, were examined morphologically and genetically and the results compared with those of field studies from elsewhere. The strains clustered into five groups, two of which are formed by C. decipiens Cleve and C. mitra (Bailey) Cleve, respectively. Their species descriptions are emended based on samples collected close to the type localities. The three other groups are formed by new species, C. elegans sp. nov., C. laevisporus sp. nov. and C. mannaii sp. nov. Characters used to distinguish each species are: orientation of setae, shape and size of the apertures, shape, size and density of the poroids on the setae and, at least in some species, characters of the resting spores. Our aim is to cover the global species diversity in this complex, as correct species delineation is the basis for exploring biodiversity, distribution of organisms, interactions in the food web and effects of environmental changes.
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Affiliation(s)
- Yang Li
- Guangzhou Key Laboratory of Subtropical Biodiversity and Biomonitoring, College of Life Science, South China Normal University, Guangzhou, P. R. China
| | - Atchaneey Boonprakob
- Natural History Museum of Denmark, University of Copenhagen, Copenhagen, Denmark
- Department of Biology, Faculty of Science, Ramkhamhaeng University, Bangkok, Thailand
| | - Chetan C. Gaonkar
- Integrative Marine Ecology, Stazione Zoologica Anton Dohrn, Naples, Italy
| | | | - Carina B. Lange
- Integrative Marine Ecology, Stazione Zoologica Anton Dohrn, Naples, Italy
- Department of Oceanography and Center COPAS Sur-Austral, University of Concepción, Concepción, Chile
| | - David Hernández-Becerril
- Instituto de Ciencias del Mar y Limnologia, Universidad Nacional Autónoma de México, Cd. Universitaria, Coyoacán, Cd. de México, México
| | - Zuoyi Chen
- Guangzhou Key Laboratory of Subtropical Biodiversity and Biomonitoring, College of Life Science, South China Normal University, Guangzhou, P. R. China
| | - Øjvind Moestrup
- Section of Marine Biology, Institute of Biology, University of Copenhagen, Copenhagen, Denmark
| | - Nina Lundholm
- Natural History Museum of Denmark, University of Copenhagen, Copenhagen, Denmark
- * E-mail:
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Phurimsak C, Tarn MD, Pamme N. Magnetic Particle Plug-Based Assays for Biomarker Analysis. Micromachines (Basel) 2016; 7:E77. [PMID: 30404252 PMCID: PMC6190463 DOI: 10.3390/mi7050077] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/13/2016] [Revised: 04/01/2016] [Accepted: 04/13/2016] [Indexed: 01/08/2023]
Abstract
Conventional immunoassays offer selective and quantitative detection of a number of biomarkers, but are laborious and time-consuming. Magnetic particle-based assays allow easy and rapid selection of analytes, but still suffer from the requirement of tedious multiple reaction and washing steps. Here, we demonstrate the trapping of functionalised magnetic particles within a microchannel for performing rapid immunoassays by flushing consecutive reagent and washing solutions over the trapped particle plug. Three main studies were performed to investigate the potential of the platform for quantitative analysis of biomarkers: (i) a streptavidin-biotin binding assay; (ii) a sandwich assay of the inflammation biomarker, C-reactive protein (CRP); and (iii) detection of the steroid hormone, progesterone (P4), towards a competitive assay. Quantitative analysis with low limits of detection was demonstrated with streptavidin-biotin, while the CRP and P4 assays exhibited the ability to detect clinically relevant analytes, and all assays were completed in only 15 min. These preliminary results show the great potential of the platform for performing rapid, low volume magnetic particle plug-based assays of a range of clinical biomarkers via an exceedingly simple technique.
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Affiliation(s)
- Chayakom Phurimsak
- Department of Chemistry, University of Hull, Cottingham Road, Hull, HU6 7RX, UK.
| | - Mark D Tarn
- Department of Chemistry, University of Hull, Cottingham Road, Hull, HU6 7RX, UK.
| | - Nicole Pamme
- Department of Chemistry, University of Hull, Cottingham Road, Hull, HU6 7RX, UK.
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Hemakom A, Goverdovsky V, Looney D, Mandic DP. Adaptive-projection intrinsically transformed multivariate empirical mode decomposition in cooperative brain-computer interface applications. Philos Trans A Math Phys Eng Sci 2016; 374:20150199. [PMID: 26953174 PMCID: PMC4792407 DOI: 10.1098/rsta.2015.0199] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [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] [Accepted: 12/16/2015] [Indexed: 06/05/2023]
Abstract
An extension to multivariate empirical mode decomposition (MEMD), termed adaptive-projection intrinsically transformed MEMD (APIT-MEMD), is proposed to cater for power imbalances and inter-channel correlations in real-world multichannel data. It is shown that the APIT-MEMD exhibits similar or better performance than MEMD for a large number of projection vectors, whereas it outperforms MEMD for the critical case of a small number of projection vectors within the sifting algorithm. We also employ the noise-assisted APIT-MEMD within our proposed intrinsic multiscale analysis framework and illustrate the advantages of such an approach in notoriously noise-dominated cooperative brain-computer interface (BCI) based on the steady-state visual evoked potentials and the P300 responses. Finally, we show that for a joint cognitive BCI task, the proposed intrinsic multiscale analysis framework improves system performance in terms of the information transfer rate.
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Affiliation(s)
- Apit Hemakom
- Department of Electrical and Electronic Engineering, Imperial College London, London SW7 2AZ, UK
| | - Valentin Goverdovsky
- Department of Electrical and Electronic Engineering, Imperial College London, London SW7 2AZ, UK
| | - David Looney
- Department of Electrical and Electronic Engineering, Imperial College London, London SW7 2AZ, UK
| | - Danilo P Mandic
- Department of Electrical and Electronic Engineering, Imperial College London, London SW7 2AZ, UK
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