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Smith CJ, Scott K, Parrett T, Rao D. An Extremely Rare Variant of Pancreatic Ductal Adenocarcinoma Masquerading as Chronic Pancreatitis. Am J Clin Pathol 2022. [DOI: 10.1093/ajcp/aqac126.117] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Abstract
Introduction/Objective
Primary Pancreatic signet-ring cell carcinoma (PPSRCC) is an extremely rare histologic variant with sparse literature. Herein, we describe a case of PPSRCC in a 75-year-old female with positive family history of pancreatic cancer (47y/o brother). The diagnosis was delayed secondary to diagnostic challenges on initial fine-needle aspiration (FNA).
Methods/Case Report
Diagnosing PPSRCC on FNA can be extremely difficult. Primary, and metastatic neoplasms to the pancreas may exhibit cytomorphological similarities to signet-ring cells, posing diagnostic challenges. Further, sampling of abundant background inflammatory cells during a biopsy can result in incorrect diagnosis of pancreatitis. Given the strong clinical suspicion based on imaging findings, a second FNA was performed which showed few atypical cells suspicious for carcinoma. Subsequently, the patient underwent neoadjuvant chemotherapy and Whipple resection. The tumor morphology is characterized by infiltrating cells with large mucin vacuoles and peripheric nucleus comprising > 50% of the mass lesion with perineural invasion, in a background of chronic inflammation and pancreatic intraepithelial neoplasia, grade III. A diagnosis of PPSRCC was rendered. Notably, lymph nodes (LN) showed no evidence of metastasis.
Results (if a Case Study enter NA)
NA.
Conclusion
Based on limited literature, PPSRCC is considered an aggressive malignancy with low survival rate, because of a high rate of metastasis. However, our case was rather unique given the lack of LN metastasis and the neodjuvant treatment strategy. As of February 2022, <10 cases have been reported with ill-defined characteristics and treatment guidelines.
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Affiliation(s)
- C J Smith
- Pathology , University of Missouri , Columbia, Missouri , United States
| | - K Scott
- Pathology , University of Missouri , Columbia, Missouri , United States
| | - T Parrett
- Pathology , University of Missouri , Columbia, Missouri , United States
| | - D Rao
- Pathology , University of Missouri , Columbia, Missouri , United States
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Smith CJ, Scott K, Rao D. Is the Primary Tumor Site of Ampullary Carcinoma Distinct in the Setting of Morphology Subtype? Am J Clin Pathol 2022. [DOI: 10.1093/ajcp/aqac126.115] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Abstract
Introduction/Objective
Ampullary cancer (AC) are rare and represents only 6% of the malignant periampullary tumors. Two main histologic subtypes of AC are pancreatobiliary (Pb-AC), and intestinal (In-AC). The data on the influencing role of several characteristics associated with AC subtypes on long term outcome is still emerging. Our study aimed to analyze the two subtypes Pb-AC and In-AC regarding their primary tumor site, median overall survival, and associated precursor lesion.
Methods/Case Report
Using the cBioPortal platform and systematic bioinformatical analysis of the Cancer Genome Atlas Baylor College of Medicine Cell Reports, 2016, 133 AC patients were included and analyzed based on their morphology subtype. Of which 62 patients had the intestinal subtype, and 71 had the pancreaticobiliary morphological subtype.
Results (if a Case Study enter NA)
The role of primary tumor site was statistically significant (p-value = 0.01) among subtypes Pb-AC and In-AC (See Figure). Remarkably, the primary tumor site most associated with the pancreaticobiliary subtype was the distal bile duct, and the intestinal subtype was intra-ampullary. Additionally, the precursor lesion identification (absent vs present) was statistically significant among the subtypes (p-value = 0.01). Further, the median overall survival in ampullary carcinoma varied among the morphology of the two subtypes: In-AC (75.56 months, (95% CI: 57.04-NA)) and Pb-AC (27.04 months, (95% CI: 18.29-NA)).
Conclusion
The findings in this study highlight the complex multifactorial role of the two morphological subtypes in AC. Further studies are essential for understanding the underlying tumor site specific molecular signatures leading to subtyping and their impact on prognosis.
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Affiliation(s)
- C J Smith
- Pathology , University of Missouri , Columbia, Missouri , United States
| | - K Scott
- Pathology , University of Missouri , Columbia, Missouri , United States
| | - D Rao
- Pathology , University of Missouri , Columbia, Missouri , United States
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Keating C, Bolton-Warberg M, Hinchcliffe J, Davies R, Whelan S, Wan AHL, Fitzgerald RD, Davies SJ, Ijaz UZ, Smith CJ. Temporal changes in the gut microbiota in farmed Atlantic cod (Gadus morhua) outweigh the response to diet supplementation with macroalgae. Anim Microbiome 2021; 3:7. [PMID: 33500003 PMCID: PMC7934267 DOI: 10.1186/s42523-020-00065-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [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: 08/20/2020] [Accepted: 11/24/2020] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND Aquaculture successfully meets global food demands for many fish species. However, aquaculture production of Atlantic cod (Gadus morhua) is just 2.5% of total market production. For cod farming to be a viable economic venture specific challenges on how to increase growth, health and farming productivity need to be addressed. Feed ingredients play a key role here. Macroalgae (seaweeds) have been suggested as a functional feed supplement with both health and economic benefits for terrestrial farmed animals and fish. The impact of such dietary supplements to cod gut integrity and microbiota, which contribute to overall fish robustness is unknown. The objective of this study was to supplement the diet of juvenile Atlantic cod with macroalgae and determine the impacts on fish condition and growth, gut morphology and hindgut microbiota composition (16S rRNA amplicon sequencing). Fish were fed one of three diets: control (no macroalgal inclusion), 10% inclusion of either egg wrack (Ascophyllum nodosum) or sea lettuce (Ulva rigida) macroalgae in a 12-week trial. RESULTS The results demonstrated there was no significant difference in fish condition, gut morphology or hindgut microbiota between the U. rigida supplemented fish group and the control group at any time-point. This trend was not observed with the A. nodosum treatment. Fish within this group were further categorised as either 'Normal' or 'Lower Growth'. 'Lower Growth' individuals found the diet unpalatable resulting in reduced weight and condition factor combined with an altered gut morphology and microbiome relative to the other treatments. Excluding this group, our results show that the hindgut microbiota was largely driven by temporal pressures with the microbial communities becoming more similar over time irrespective of dietary treatment. The core microbiome at the final time-point consisted of the orders Vibrionales (Vibrio and Photobacterium), Bacteroidales (Bacteroidetes and Macellibacteroides) and Clostridiales (Lachnoclostridium). CONCLUSIONS Our study indicates that U. rigida macroalgae can be supplemented at 10% inclusion levels in the diet of juvenile farmed Atlantic cod without any impact on fish condition or hindgut microbial community structure. We also conclude that 10% dietary inclusion of A. nodosum is not a suitable feed supplement in a farmed cod diet.
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Affiliation(s)
- C Keating
- Department of Microbiology, School of Natural Sciences, National University of Ireland Galway, Galway, H91 TK33, Ireland.
- Water and Environment Group, Infrastructure and Environment Division, James Watt School of Engineering, University of Glasgow, Glasgow, G12 8LT, UK.
| | - M Bolton-Warberg
- Carna Research Station, Ryan Institute, National University of Ireland Galway, Carna, Co, Galway, H91 V8Y1, Ireland
| | - J Hinchcliffe
- Department of Biological and Environmental Sciences, University of Gothenburg, Gothenburg, Sweden
| | - R Davies
- AquaBioTech Group, Central Complex, Naggar Street, Targa Gap, Mosta, G.C, MST 1761, Malta
| | - S Whelan
- Carna Research Station, Ryan Institute, National University of Ireland Galway, Carna, Co, Galway, H91 V8Y1, Ireland
| | - A H L Wan
- Irish Seaweed Research Group, Ryan Institute and School of Natural Sciences, National University of Ireland Galway, Galway, H91 TK33, Ireland
- Aquaculture Nutrition and Aquafeed Research Unit, Carna Research Station, Ryan Institute and School of Natural Sciences, National University of Ireland Galway, Carna, Co, Galway, H91 V8Y1, Ireland
| | - R D Fitzgerald
- Carna Research Station, Ryan Institute, National University of Ireland Galway, Carna, Co, Galway, H91 V8Y1, Ireland
| | - S J Davies
- Department of Animal Production, Welfare and Veterinary Science, Harper Adams University, Newport, Shropshire, TF10 8NB, UK
| | - U Z Ijaz
- Water and Environment Group, Infrastructure and Environment Division, James Watt School of Engineering, University of Glasgow, Glasgow, G12 8LT, UK.
| | - C J Smith
- Department of Microbiology, School of Natural Sciences, National University of Ireland Galway, Galway, H91 TK33, Ireland.
- Water and Environment Group, Infrastructure and Environment Division, James Watt School of Engineering, University of Glasgow, Glasgow, G12 8LT, UK.
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West RM, Smith CJ, Pavitt SH, Butler CC, Howard P, Bates C, Savic S, Wright JM, Hewison J, Sandoe JAT. 'Warning: allergic to penicillin': association between penicillin allergy status in 2.3 million NHS general practice electronic health records, antibiotic prescribing and health outcomes. J Antimicrob Chemother 2020; 74:2075-2082. [PMID: 31225607 DOI: 10.1093/jac/dkz127] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Revised: 02/26/2019] [Accepted: 02/28/2019] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND The prevalence of reported penicillin allergy (PenA) and the impact these records have on health outcomes in the UK general population are unknown. Without such data, justifying and planning enhanced allergy services is challenging. OBJECTIVES To determine: (i) prevalence of PenA records; (ii) patient characteristics associated with PenA records; and (iii) impact of PenA records on antibiotic prescribing/health outcomes in primary care. METHODS We carried out cross-sectional/retrospective cohort studies using patient-level data from electronic health records. Cohort study: exact matching across confounders identified as affecting PenA records. Setting: English NHS general practices between 1 April 2013 and 31 March 2014. Participants: 2.3 million adult patients. Outcome measures: prevalence of PenA, antibiotic prescribing, mortality, MRSA infection/colonization and Clostridioides difficile infection. RESULTS PenA prevalence was 5.9% (IQR = 3.8%-8.2%). PenA records were more common in older people, females and those with a comorbidity, and were affected by GP practice. Antibiotic prescribing varied significantly: penicillins were prescribed less frequently in those with a PenA record [relative risk (RR) = 0.15], and macrolides (RR = 4.03), tetracyclines (RR = 1.91) nitrofurantoin (RR = 1.09), trimethoprim (RR = 1.04), cephalosporins (RR = 2.05), quinolones (RR = 2.10), clindamycin (RR = 5.47) and total number of prescriptions were increased in patients with a PenA record. Risk of re-prescription of a new antibiotic class within 28 days (RR = 1.32), MRSA infection/colonization (RR = 1.90) and death during the year subsequent to 1 April 2013 (RR = 1.08) increased in those with PenA records. CONCLUSIONS PenA records are common in the general population and associated with increased/altered antibiotic prescribing and worse health outcomes. We estimate that incorrect PenA records affect 2.7 million people in England. Establishing true PenA status (e.g. oral challenge testing) would allow more people to be prescribed first-line antibiotics, potentially improving health outcomes.
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Affiliation(s)
- R M West
- Leeds Institute for Health Sciences, University of Leeds, Leeds, UK
| | - C J Smith
- Leeds Institute for Health Sciences, University of Leeds, Leeds, UK
| | - S H Pavitt
- School of Dentistry, University of Leeds, Leeds, UK
| | - C C Butler
- University of Oxford Primary Care Clinical Trials Unit, Oxford, UK
| | - P Howard
- Faculty of Medicine and Health, University of Leeds and Leeds Teaching Hospitals NHS Trust, Leeds, UK
| | | | - S Savic
- Faculty of Medicine and Health, University of Leeds and Leeds Teaching Hospitals NHS Trust, Leeds, UK
| | - J M Wright
- Leeds Institute for Health Sciences, University of Leeds, Leeds, UK
| | - J Hewison
- Leeds Institute for Health Sciences, University of Leeds, Leeds, UK
| | - J A T Sandoe
- Faculty of Medicine and Health, University of Leeds and Leeds Teaching Hospitals NHS Trust, Leeds, UK
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5
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Smith CJ, Huff AK, Zhang H, Mo Y, Leopold KR. A strong dependence of the CH 3 internal rotation barrier on conformation in thioacetic acid: Microwave measurements and an energy decomposition analysis. J Chem Phys 2019; 150:134302. [PMID: 30954056 DOI: 10.1063/1.5087718] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Rotational spectra of thioacetic acid (CH3COSH) have been observed by pulsed-nozzle Fourier transform microwave spectroscopy. Spectroscopic constants are reported for both the syn and anti conformers of the parent species, as well as the 34S and 13C carbonyl isotopologues. Transitions arising from the lowest A and E internal rotor states of the methyl group have been observed and analyzed. Experimental values of the three-fold internal rotation barrier, V3, for the syn and anti conformers of the parent isotopologue are 76.300(12) and 358.056(51) cm-1, respectively, indicating a large effect of the S-H orientation on the CH3 internal rotation potential. M06-2X/6-311+G(d,p) calculations are in good agreement with these results. The block localized energy decomposition method has been applied to understand the origins of this strong dependence of V3 on conformation. The results indicate that π conjugation from the SH to the carbonyl group and steric repulsion between the SH and the methyl group in the anti form are main contributors to the difference.
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Affiliation(s)
- C J Smith
- Department of Chemistry, University of Minnesota, 207 Pleasant St., SE, Minneapolis, Minnesota 55455, USA
| | - Anna K Huff
- Department of Chemistry, University of Minnesota, 207 Pleasant St., SE, Minneapolis, Minnesota 55455, USA
| | - Huaiyu Zhang
- Institute of Computational Quantum Chemistry, College of Chemistry and Material Science, Hebei Normal University, Shijiazhuang, China
| | - Yirong Mo
- Department of Chemistry, Western Michigan University, 1903 W Michigan Ave., Kalamazoo, Michigan 49008 USA
| | - Kenneth R Leopold
- Department of Chemistry, University of Minnesota, 207 Pleasant St., SE, Minneapolis, Minnesota 55455, USA
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6
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Hernández-Nava E, Mahoney P, Smith CJ, Donoghue J, Todd I, Tammas-Williams S. Additive manufacturing titanium components with isotropic or graded properties by hybrid electron beam melting/hot isostatic pressing powder processing. Sci Rep 2019; 9:4070. [PMID: 30858554 PMCID: PMC6411771 DOI: 10.1038/s41598-019-40722-3] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [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: 10/02/2018] [Accepted: 02/20/2019] [Indexed: 11/18/2022] Open
Abstract
A methodology has been demonstrated to consolidate Ti-6Al-4V powder without taking it to the liquid state by novel combination of the electron beam melting additive manufacture and hot isostatic pressing processes. This results in improved static mechanical properties (both strength and yield) in comparison to standard EBM processed material. In addition, the ability to generate microstructurally graded components has been demonstrated by generating a component with a significant change in both microstructure and mechanical properties. This is revealed by the use of electron backscattered diffraction and micro hardness testing to produce maps showing a clear distinction between materials consolidated in different ways. The variation in microstructure and mechanical properties is attributed to the different thermal history experienced by the material at different locations. In particular, it is found that the rapid cooling experienced during EBM leads to a typical fine α lath structure, whereas a more equiaxed α grains generated by diffusion is found in HIP consolidated powder.
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Affiliation(s)
- E Hernández-Nava
- Department of Materials Science and Engineering, University of Sheffield, Sheffield, S1 3JD, UK.
| | - P Mahoney
- Department of Materials Science and Engineering, University of Sheffield, Sheffield, S1 3JD, UK
| | - C J Smith
- Department of Materials Science and Engineering, University of Sheffield, Sheffield, S1 3JD, UK
| | - J Donoghue
- School of Materials, University of Manchester, Manchester, M13 9PL, UK
| | - I Todd
- Department of Materials Science and Engineering, University of Sheffield, Sheffield, S1 3JD, UK
| | - S Tammas-Williams
- Department of Materials Science and Engineering, University of Sheffield, Sheffield, S1 3JD, UK.,Department of Maritime and Mechanical Engineering, Liverpool John Moores University, Liverpool, L3 3AF, UK
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Tsikopoulou I, Moraitis ML, Geropoulos A, Papadopoulou KN, Papageorgiou N, Plaiti W, Smith CJ, Karakassis I, Eleftheriou A. Long-term changes in the structure of benthic communities: Revisiting a sampling transect in Crete after 24 years. Mar Environ Res 2019; 144:9-19. [PMID: 30501903 DOI: 10.1016/j.marenvres.2018.11.008] [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: 07/30/2018] [Revised: 11/09/2018] [Accepted: 11/15/2018] [Indexed: 06/09/2023]
Abstract
A bathymetric transect in the north coast of Crete first studied in 1989, was revisited 24 years later. Identical sampling design, season, techniques and protocols were followed in both studies in order to minimize bias in the long-term comparisons. This comprehensive macrofaunal dataset (4 stations, 2 sampling seasons, 7 replicates in each study) revealed changes in benthic diversity and community composition between the sampling periods. The recorded changes were higher at the stations located close to the coastal zone. In addition, while benthic communities showed lower total abundance during the recent sampling period, species abundances were more evenly distributed indicating that some species dominated the historical communities. In spite of these changes, the ecological status remained above the threshold values for good ecological status. The results indicated that changes in the benthic community seem to have been driven by local anthropogenic factors and natural variability rather than by large-scale factors such as nutrients influxes in the entire Mediterranean Basin.
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Affiliation(s)
- I Tsikopoulou
- Marine Ecology Laboratory, Department of Biology, University of Crete, GR 70013, Heraklion, Greece.
| | - M L Moraitis
- Marine Ecology Laboratory, Department of Biology, University of Crete, GR 70013, Heraklion, Greece
| | - A Geropoulos
- Marine Ecology Laboratory, Department of Biology, University of Crete, GR 70013, Heraklion, Greece
| | - K N Papadopoulou
- Hellenic Centre for Marine Research, Institute of Marine Biological Resources, GR 71003, Heraklion, Greece
| | - N Papageorgiou
- Marine Ecology Laboratory, Department of Biology, University of Crete, GR 70013, Heraklion, Greece
| | - W Plaiti
- Hellenic Centre for Marine Research Institute of Marine Biology, Biotechnology and Aquaculture, GR 71003, Heraklion, Greece
| | - C J Smith
- Hellenic Centre for Marine Research, Institute of Marine Biological Resources, GR 71003, Heraklion, Greece
| | - I Karakassis
- Marine Ecology Laboratory, Department of Biology, University of Crete, GR 70013, Heraklion, Greece
| | - A Eleftheriou
- Marine Ecology Laboratory, Department of Biology, University of Crete, GR 70013, Heraklion, Greece; Hellenic Centre for Marine Research Institute of Marine Biology, Biotechnology and Aquaculture, GR 71003, Heraklion, Greece
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Keating C, Hughes D, Mahony T, Cysneiros D, Ijaz UZ, Smith CJ, O'Flaherty V. Cold adaptation and replicable microbial community development during long-term low-temperature anaerobic digestion treatment of synthetic sewage. FEMS Microbiol Ecol 2018; 94:5004848. [PMID: 29846574 PMCID: PMC5995215 DOI: 10.1093/femsec/fiy095] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Accepted: 05/24/2018] [Indexed: 11/12/2022] Open
Abstract
The development and activity of a cold-adapting microbial community was monitored during low-temperature anaerobic digestion (LtAD) treatment of wastewater. Two replicate hybrid anaerobic sludge bed-fixed-film reactors treated a synthetic sewage wastewater at 12°C, at organic loading rates of 0.25-1.0 kg chemical oxygen demand (COD) m-3 d-1, over 889 days. The inoculum was obtained from a full-scale anaerobic digestion reactor, which was operated at 37°C. Both LtAD reactors readily degraded the influent with COD removal efficiencies regularly exceeding 78% for both the total and soluble COD fractions. The biomass from both reactors was sampled temporally and tested for activity against hydrolytic and methanogenic substrates at 12°C and 37°C. Data indicated that significantly enhanced low-temperature hydrolytic and methanogenic activity developed in both systems. For example, the hydrolysis rate constant (k) at 12°C had increased 20-30-fold by comparison to the inoculum by day 500. Substrate affinity also increased for hydrolytic substrates at low temperature. Next generation sequencing demonstrated that a shift in a community structure occurred over the trial, involving a 1-log-fold change in 25 SEQS (OTU-free approach) from the inoculum. Microbial community structure changes and process performance were replicable in the LtAD reactors.
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Affiliation(s)
- C Keating
- Microbiology, School of Natural Sciences and Ryan Institute, National University of Ireland, Galway, Ireland
| | - D Hughes
- Microbiology, School of Natural Sciences and Ryan Institute, National University of Ireland, Galway, Ireland
| | - T Mahony
- Microbiology, School of Natural Sciences and Ryan Institute, National University of Ireland, Galway, Ireland
| | - D Cysneiros
- Microbiology, School of Natural Sciences and Ryan Institute, National University of Ireland, Galway, Ireland
| | - U Z Ijaz
- Infrastructure and Environment, School of Engineering, University of Glasgow, Rankine Building, 79-85 Oakfield Avenue, Glasgow, G12 8LT, UK
| | - C J Smith
- Microbiology, School of Natural Sciences and Ryan Institute, National University of Ireland, Galway, Ireland
| | - V O'Flaherty
- Microbiology, School of Natural Sciences and Ryan Institute, National University of Ireland, Galway, Ireland
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Abstract
Patients with cardiac failure require careful evaluation to determine the precise nature of the cause of their illness. Genetic causes of dilated cardiomyopathy are well known but inherited conditions may lead to unexpected consequences through intermediate mechanisms not readily recognised as a feature of the inherited disorder. We describe a case of dilated cardiomyopathy resulting from prolonged hypocalcaemia due to previously undiagnosed hypoparathyroidism resulting from DiGeorge Syndrome and describe the features of this case and the treatment of hypoparathyroidism.
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Affiliation(s)
- A Jamieson
- A Jamieson, Medical Unit, St John's Hospital, Howden S Road, Livingston EH54 6PP, UK. Email
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10
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Smith CJ, Ryckman KK, Barnabei VM, Howard BV, Isasi CR, Sarto GE, Tom SE, Van Horn LV, Wallace RB, Robinson JG. The impact of birth weight on cardiovascular disease risk in the Women's Health Initiative. Nutr Metab Cardiovasc Dis 2016; 26:239-245. [PMID: 26708645 PMCID: PMC4788544 DOI: 10.1016/j.numecd.2015.10.015] [Citation(s) in RCA: 60] [Impact Index Per Article: 7.5] [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: 05/20/2015] [Revised: 10/14/2015] [Accepted: 10/29/2015] [Indexed: 11/30/2022]
Abstract
BACKGROUND AND AIMS Cardiovascular disease (CVD) is among the leading causes of morbidity and mortality worldwide. Traditional risk factors predict 75-80% of an individual's risk of incident CVD. However, the role of early life experiences in future disease risk is gaining attention. The Barker hypothesis proposes fetal origins of adult disease, with consistent evidence demonstrating the deleterious consequences of birth weight outside the normal range. In this study, we investigate the role of birth weight in CVD risk prediction. METHODS AND RESULTS The Women's Health Initiative (WHI) represents a large national cohort of post-menopausal women with 63,815 participants included in this analysis. Univariable proportional hazards regression analyses evaluated the association of 4 self-reported birth weight categories against 3 CVD outcome definitions, which included indicators of coronary heart disease, ischemic stroke, coronary revascularization, carotid artery disease and peripheral arterial disease. The role of birth weight was also evaluated for prediction of CVD events in the presence of traditional risk factors using 3 existing CVD risk prediction equations: one body mass index (BMI)-based and two laboratory-based models. Low birth weight (LBW) (<6 lbs.) was significantly associated with all CVD outcome definitions in univariable analyses (HR = 1.086, p = 0.009). LBW was a significant covariate in the BMI-based model (HR = 1.128, p < 0.0001) but not in the lipid-based models. CONCLUSION LBW (<6 lbs.) is independently associated with CVD outcomes in the WHI cohort. This finding supports the role of the prenatal and postnatal environment in contributing to the development of adult chronic disease.
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Affiliation(s)
- C J Smith
- University of Iowa Department of Epidemiology, College of Public Health, 145 N. Riverside Drive, Iowa City, IA, 52242, USA
| | - K K Ryckman
- University of Iowa Department of Epidemiology, College of Public Health, 145 N. Riverside Drive, Iowa City, IA, 52242, USA
| | - V M Barnabei
- University at Buffalo, Department of Obstetrics and Gynecology, 219 Bryant Street, Buffalo, NY, 14221, USA
| | - B V Howard
- Medstar Health Research Institute, Hyattsville, MD, USA; Georgetown/Howard Universities Center for Clinical and Translational Research, USA
| | - C R Isasi
- Albert Einstein College of Medicine, Department of Epidemiology and Population Health, Bronx, NY, USA
| | - G E Sarto
- University of Wisconsin, Department of Obstetrics and Gynecology, Madison, WI, USA
| | - S E Tom
- University of Maryland, School of Pharmacy, Baltimore, MD, USA
| | - L V Van Horn
- Northwestern University, Feinberg School of Medicine, Chicago, IL, USA
| | - R B Wallace
- University of Iowa Department of Epidemiology, College of Public Health, 145 N. Riverside Drive, Iowa City, IA, 52242, USA
| | - J G Robinson
- University of Iowa Department of Epidemiology, College of Public Health, 145 N. Riverside Drive, Iowa City, IA, 52242, USA.
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11
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Achhra AC, Mocroft A, Reiss P, Sabin C, Ryom L, de Wit S, Smith CJ, d'Arminio Monforte A, Phillips A, Weber R, Lundgren J, Law MG. Short-term weight gain after antiretroviral therapy initiation and subsequent risk of cardiovascular disease and diabetes: the D:A:D study. HIV Med 2015. [PMID: 26216031 DOI: 10.1111/hiv.12294] [Citation(s) in RCA: 99] [Impact Index Per Article: 11.0] [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: 11/30/2022]
Abstract
OBJECTIVES The aim of the study was to assess the impact of the gain in body mass index (BMI) observed immediately after antiretroviral therapy (ART) initiation on the subsequent risk of cardiovascular disease (CVD) and diabetes. METHODS We analysed data from the Data Collection on Adverse Events of Anti-HIV Drugs (D:A:D) cohort study. Outcomes were development of (i) CVD (composite of myocardial infarction/stroke/coronary procedure) and (ii) diabetes. The main exposure variable was change in BMI from ART initiation (pre-ART) to 1 year after initiation (continuous variable) in treatment-naïve individuals initiating ART with no history of CVD or diabetes (for respective outcomes). BMI [weight (kg)/(height (m))(2)] was categorized as underweight (< 18.5), normal (18.5-25), overweight (25-30) and obese (> 30). Poisson regression models were fitted stratified for each pre-ART BMI category to allow for category-specific estimates of incidence rate ratio (IRR). Models were adjusted for pre-ART BMI and CD4 count, key known risk factors (time-updated where possible) and calendar year. RESULTS A total of 97 CVD events occurred in 43,982 person-years (n = 9321) and 125 diabetes events in 43,278 person-years (n = 9193). In fully adjusted analyses for CVD, the IRR/unit gain in BMI (95% confidence interval) in the first year of ART, by pre-ART BMI category, was: underweight, 0.90 (0.60-1.37); normal, 1.18 (1.05-1.33); overweight, 0.87 (0.70-1.10), and obese, 0.95 (0.71-1.28) (P for interaction = 0.04). For diabetes, the IRR/unit gain in BMI was 1.11 (95% confidence interval 1.03 to 1.21), regardless of pre-ART BMI (P for interaction > 0.05). CONCLUSIONS Short-term gain in BMI following ART initiation appeared to increase the longer term risk of CVD, but only in those with pre-ART BMI in the normal range. It was also associated with increased risk of diabetes regardless of pre-ART BMI.
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Affiliation(s)
- A C Achhra
- Kirby Institute, UNSW Australia, Sydney, NSW, Australia
| | - A Mocroft
- Research Department of Infection & Population Health, University College London, London, UK
| | - P Reiss
- Division of Infectious Diseases and Department of Global Health, University of Amsterdam, Amsterdam, The Netherlands
| | - C Sabin
- Research Department of Infection & Population Health, University College London, London, UK
| | - L Ryom
- University of Copenhagen, Copenhagen, Denmark
| | - S de Wit
- Infectious Diseases Department, Saint-Pierre University Hospital, Brussels, Belgium
| | - C J Smith
- Research Department of Infection & Population Health, University College London, London, UK
| | | | - A Phillips
- Research Department of Infection & Population Health, University College London, London, UK
| | - R Weber
- University Hospital in Zurich, Zurich, Switzerland
| | - J Lundgren
- Rigshospitalet & University of Copenhagen, Copenhagen, Denmark
| | - M G Law
- Kirby Institute, UNSW Australia, Sydney, NSW, Australia
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12
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Saunders P, Goodman AL, Smith CJ, Marshall N, O'Connor JL, Lampe FC, Johnson MA. Does gender or mode of HIV acquisition affect virological response to modern antiretroviral therapy (ART)? HIV Med 2015; 17:18-27. [PMID: 26140659 DOI: 10.1111/hiv.12272] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/11/2015] [Indexed: 11/28/2022]
Abstract
OBJECTIVES Previous UK studies have reported disparities in HIV treatment outcomes for women. We investigated whether these differences persist in the modern antiretroviral treatment (ART) era. METHODS A single-centre cohort analysis was carried out. We included in the study all previously ART-naïve individuals at our clinic starting triple ART from 1 January 2006 onwards with at least one follow-up viral load (VL). Time to viral suppression (VS; first viral load < 50 HIV-1 RNA copies/mL), virological failure (VF; first of two consecutive VLs > 200 copies/mL more than 6 months post-ART) and treatment modification were estimated using standard survival methods. RESULTS Of 1086 individuals, 563 (52%) were men whose risk for HIV acquisition was sex with other men (MSM), 207 (19%) were men whose risk for HIV acquisition was sex with women (MSW) and 316 (29%) were women. Median pre-ART CD4 count and time since HIV diagnosis in these groups were 298, 215 and 219 cells/μL, and 2.3, 0.3 and 0.3 years, respectively. Time to VS was comparable between groups, but women [adjusted hazard ratio (aHR) 2.32; 95% confidence interval (CI) 1.28-4.22] and MSW (aHR 3.28; 95% CI 1.91-5.64) were at considerably higher risk of VF than MSM. Treatment switches and complete discontinuation were also more common among MSW [aHR 1.38 (95% CI 1.04-1.81) and aHR 1.73 (95% CI 0.97-3.16), respectively] and women [aHR 1.87 (95% CI 1.43-2.46) and aHR 3.20 (95% CI 2.03-5.03), respectively] than MSM. CONCLUSIONS Although response rates were good in all groups, poorer virological outcomes for women and MSW have persisted into the modern ART era. Factors that might influence the differences include socioeconomic status and mental health disorders. Further interventions to ensure excellent response rates in women and MSW are required.
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Affiliation(s)
- P Saunders
- Royal Free London NHS Foundation Trust, London, UK
| | - A L Goodman
- Royal Free London NHS Foundation Trust, London, UK.,Department of Infection and Immunity, University College London, London, UK
| | - C J Smith
- Research Department of Infection and Population Health, University College London, London, UK
| | - N Marshall
- Royal Free London NHS Foundation Trust, London, UK
| | - J L O'Connor
- Research Department of Infection and Population Health, University College London, London, UK
| | - F C Lampe
- Research Department of Infection and Population Health, University College London, London, UK
| | - M A Johnson
- Royal Free London NHS Foundation Trust, London, UK
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13
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Ryckman KK, Spracklen CN, Smith CJ, Robinson JG, Saftlas AF. Maternal lipid levels during pregnancy and gestational diabetes: a systematic review and meta-analysis. BJOG 2015; 122:643-51. [PMID: 25612005 DOI: 10.1111/1471-0528.13261] [Citation(s) in RCA: 233] [Impact Index Per Article: 25.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/04/2014] [Indexed: 02/06/2023]
Abstract
BACKGROUND Lipid levels during pregnancy in women with gestational diabetes mellitus (GDM) have been extensively studied; however, it remains unclear whether dyslipidaemia is a potential marker of preexisting insulin resistance. OBJECTIVE To evaluate the relationship between lipid measures throughout pregnancy and GDM. SEARCH STRATEGY We searched PubMed-MedLine and SCOPUS (inception until January 2014) and reference lists of relevant studies. SELECTION CRITERIA Publications describing original data with at least one raw lipid (total cholesterol, high-density lipoprotein cholesterol [HDL-C], low-density lipoprotein cholesterol [LDL-C], or triglyceride) measurement during pregnancy in women with GDM and healthy pregnant controls were retained. DATA COLLECTION AND ANALYSIS Data extracted from 60 studies were pooled and weighted mean difference (WMD) in lipid levels was calculated using random effects models. Meta-regression was also performed to identify sources of heterogeneity. MAIN RESULTS Triglyceride levels were significantly elevated in women with GDM compared with those without GDM (WMD 30.9, 95% confidence interval [95% CI] 25.4-36.4). This finding was consistent in the first, second and third trimesters of pregnancy. HDL-C levels were significantly lower in women with GDM compared with those without GDM in the second (WMD -4.6, 95% CI -6.2 to -3.1) and third (WMD -4.1, 95% CI -6.5 to -1.7) trimesters of pregnancy. There were no differences in aggregate total cholesterol or LDL-C levels between women with GDM and those without insulin resistance. AUTHOR'S CONCLUSIONS Our meta-analysis shows that triglycerides are significantly elevated among women with GDM compared with women without insulin resistance and this finding persists across all three trimesters of pregnancy.
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Affiliation(s)
- K K Ryckman
- Department of Epidemiology, University of Iowa College of Public Health, Iowa City, IA, USA
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14
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Nelson MD, Trojanowski NF, George-Raizen JB, Smith CJ, Yu CC, Fang-Yen C, Raizen DM. The neuropeptide NLP-22 regulates a sleep-like state in Caenorhabditis elegans. Nat Commun 2014; 4:2846. [PMID: 24301180 PMCID: PMC3867200 DOI: 10.1038/ncomms3846] [Citation(s) in RCA: 47] [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: 08/23/2013] [Accepted: 10/30/2013] [Indexed: 11/09/2022] Open
Abstract
Neuropeptides play central roles in the regulation of homeostatic behaviors such as sleep and feeding. Caenorhabditis elegans displays sleep-like quiescence of locomotion and feeding during a larval transition stage called lethargus and feeds during active larval and adult stages. Here we show that the neuropeptide NLP-22 is a regulator of Caenorhabditis elegans sleep-like quiescence observed during lethargus. nlp-22 shows cyclical mRNA expression in synchrony with lethargus; it is regulated by LIN-42, an orthologue of the core circadian protein PERIOD; and it is expressed solely in the two RIA interneurons. nlp-22 and the RIA interneurons are required for normal lethargus quiescence, and forced expression of nlp-22 during active stages causes anachronistic locomotion and feeding quiescence. Optogenetic stimulation of RIA interneurons has a movement-promoting effect, demonstrating functional complexity in a single neuron type. Our work defines a quiescence-regulating role for NLP-22 and expands our knowledge of the neural circuitry controlling Caenorhabditis elegans behavioral quiescence.
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Affiliation(s)
- M D Nelson
- Department of Neurology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
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15
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Anastasopoulou A, Mytilineou C, Lefkaditou E, Dokos J, Smith CJ, Siapatis A, Bekas P, Papadopoulou KN. Diet and feeding strategy of blackmouth catshark Galeus melastomus. J Fish Biol 2013; 83:1637-1655. [PMID: 24298955 DOI: 10.1111/jfb.12269] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Diet and feeding strategy of the blackmouth catshark Galeus melastomus in the deep waters of the eastern Ionian Sea were investigated. Sampling was carried out using experimental bottom longline fishing at depths ranging from 300 to 855 m in summer and autumn 2010. Diet variability with fish size, season, area, sex and depth zone was tested and only season was found to significantly affect the diet of the species. Of the 870 stomachs examined, only 1·4% were empty. Cumulative prey curves showed that the sample sizes were adequate to describe the main prey items of the diet for both seasons. Prey identified belonged primarily to three major groups: fishes, cephalopods and dendrobranchiatan and caridean shrimps. In autumn, the above three major groups were found as principal prey, whereas in summer cephalopods followed by fishes were the principal prey and shrimps were found as secondary prey. SIMPER analysis indicated high dissimilarity between seasons and highlighted that Sepiolidae, Myctophidae, fishes, cephalopods, shrimps and other crustaceans contributed to seasonal differences in the diet of G. melastomus. The prey diversity index was higher in autumn than in summer. A high dietary overlap was observed between the two seasons. Galeus melastomus behaved as an opportunistic predator with a variety of unimportant prey in its diet. Feeding strategy indicated that G. melastomus holds a generalist niche with a considerable specialization at the individual level. This strategy seems to be an adaptation to a food-scarce environment, as typified in deep-water habitats.
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Affiliation(s)
- A Anastasopoulou
- Hellenic Centre for Marine Research, Institute of Marine Biological Resources and Inland Waters, 46.7 km Athens Sounio, Mavro Lithari, P. O. Box 712, 19013 Anavissos, Attica, Greece
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16
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Mytilineou C, Tsagarakis K, Bekas P, Anastasopoulou A, Kavadas S, Machias A, Haralabous J, Smith CJ, Petrakis G, Dokos J, Kapandagakis A. Spatial distribution and life-history aspects of blackspot seabream Pagellus bogaraveo (Osteichthyes: Sparidae). J Fish Biol 2013; 83:1551-1575. [PMID: 24298951 DOI: 10.1111/jfb.12271] [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] [Indexed: 06/02/2023]
Abstract
Spatial distribution and life history aspects of Pagellus bogaraveo in the eastern Ionian Sea were investigated using the data from 13 different studies carried out in the area from 1983 to 2010. The spatial patterns of the abundance, biomass and mean size showed that the species inhabits the shallow waters of the shelf (<170 m depth) as juveniles up to a certain size (<180 mm total length, LT ), moving to deeper waters of the slope (mainly 400-500 m depth) as adults. The spatial pattern of abundance indicated a continuous distribution of the species in deep waters, with hot-spot areas of high values, whereas in shallow waters distribution was more discontinuous, with higher concentrations of juveniles in estuaries and brackish waters. The study of biological aspects of the species revealed (1) a difference in the increase in mass between males and females, (2) protandrous hermaphroditism, accompanied by the presence of primary females and males that do not change sex, (3) a sex ratio in favour of females >250 mm LT , (4) the presence of hermaphrodites between 200 and 370 mm, (5) a long reproduction period from June to March, (6) a size at first maturity around 300 mm and (7) a diet composition of adults based mainly on fishes, and also on opportunistic behaviour in the food scarce environment of deep waters. The results suggest that the species' distribution and feeding strategies are the most appropriate for the oligotrophic eastern Ionian waters and that these conditions result in smaller sizes of the species in the east Mediterranean Sea compared to the west basin and the east Atlantic Ocean, with implications for the growth and reproductive biology of the species.
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Affiliation(s)
- Ch Mytilineou
- Hellenic Centre for Marine Research, 46.7 km Athens-Sounio, P. O. Box 1712, 19013 Anavissos Attica, Greece
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17
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Affiliation(s)
- C J Smith
- Research Department of Infection and Population Health, UCL, Royal Free Campus, London, NW3 2PF, UK.
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Thakker DH, Cullinan P, Hubbard R, Smith CJ, MacNeill SJ. P273 Asthma: Is It as Predictable as the Seasons? Thorax 2012. [DOI: 10.1136/thoraxjnl-2012-202678.365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Affiliation(s)
- C J Smith
- Research Department of Infection and Population Health, UCL, Royal Free Campus, Rowland Hill Street, London NW3 2PF, UK
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21
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Smith CJ. Type I and Type II errors: what are they and why do they matter? Phlebology 2012; 27:199-200. [DOI: 10.1258/phleb.2012.012j04] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Affiliation(s)
- C J Smith
- Research Department of Infection and Population Health, UCL, Royal Free Campus, Rowland Hill Street, London NW3 2PF, UK
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22
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Affiliation(s)
- C J Smith
- Research Department of Infection and Population Health, UCL, Rowland Hill Street, LondonNW3 2PF, UK
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23
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Affiliation(s)
- C J Smith
- Research Department of Infection and Population Health, UCL, London NW3 2PF, UK.
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24
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Affiliation(s)
- C J Smith
- Research Department of Infection and Population Health, UCL, Rowland Hill Street, London NW3 2PF, UK.
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25
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Affiliation(s)
- C J Smith
- Research Department of Infection and Population Health, UCL Medical School, Royal Free Campus, Rowland Hill Street, London NW3 2PF, UK.
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26
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Affiliation(s)
- C J Smith
- Research Department of Infection and Population Health, UCL Medical School, Royal Free Campus, Rowland Hill Street, London NW3 2PF, UK.
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27
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Smith CJ. Repeated measurements on individuals. Phlebology 2011; 26:313-4. [DOI: 10.1258/phleb.2011.011j05] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Affiliation(s)
- C J Smith
- Research Department of Infection and Population Health, UCL Medical School, Royal Free Campus, Rowland Hill Street, London NW3 2PF, UK
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Smith CJ. Systematic reviews and meta-analyses. Phlebology 2011; 26:271-3. [DOI: 10.1258/phleb.2011.011j04] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Affiliation(s)
- C J Smith
- Research Department of Infection and Population Health, UCL Medical School, Royal Free Campus, Rowland Hill Street, London NW3 2PF, UK
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Murray M, Hogg RS, Lima VD, May MT, Moore DM, Abgrall S, Bruyand M, D'Arminio Monforte A, Tural C, Gill MJ, Harris RJ, Reiss P, Justice A, Kirk O, Saag M, Smith CJ, Weber R, Rockstroh J, Khaykin P, Sterne JAC. The effect of injecting drug use history on disease progression and death among HIV-positive individuals initiating combination antiretroviral therapy: collaborative cohort analysis. HIV Med 2011; 13:89-97. [PMID: 21819529 DOI: 10.1111/j.1468-1293.2011.00940.x] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND We examined whether determinants of disease progression and causes of death differ between injecting drug users (IDUs) and non-IDUs who initiate combination antiretroviral therapy (cART). METHODS The ART Cohort Collaboration combines data from participating cohort studies on cART-naïve adults from cART initiation. We used Cox models to estimate hazard ratios for death and AIDS among IDUs and non-IDUs. The cumulative incidence of specific causes of death was calculated and compared using methods that allow for competing risks. RESULTS Data on 6269 IDUs and 37 774 non-IDUs were analysed. Compared with non-IDUs, a lower proportion of IDUs initiated cART with a CD4 cell count <200 cells/μL or had a prior diagnosis of AIDS. Mortality rates were higher in IDUs than in non-IDUs (2.08 vs. 1.04 per 100 person-years, respectively; P<0.001). Lower baseline CD4 cell count, higher baseline HIV viral load, clinical AIDS at baseline, and later year of cART initiation were associated with disease progression in both groups. However, the inverse association of baseline CD4 cell count with AIDS and death appeared stronger in non-IDUs than in IDUs. The risk of death from each specific cause was higher in IDUs than non-IDUs, with particularly marked increases in risk for liver-related deaths, and those from violence and non-AIDS infection. CONCLUSION While liver-related deaths and deaths from direct effects of substance abuse appear to explain much of the excess mortality in IDUs, they are at increased risk for many other causes of death, which may relate to suboptimal management of HIV disease in these individuals.
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Affiliation(s)
- M Murray
- Division of Infectious Diseases, University of British Columbia, Vancouver, British Columbia, Canada
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Affiliation(s)
- C J Smith
- Research Department of Infection and Population Health, UCL Medical School, Royal Free Campus, Rowland Hill Street, London, UK
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Sherr L, Lampe FC, Clucas C, Johnson M, Fisher M, Leake Date H, Anderson J, Edwards S, Smith CJ, Hill T, Harding R. Self-reported non-adherence to ART and virological outcome in a multiclinic UK study. AIDS Care 2011; 22:939-45. [PMID: 20574863 DOI: 10.1080/09540121.2010.482126] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Adherence is of fundamental importance to ART success. We examined the association of self-reported non-adherence with demographic factors, health and behaviour issues, and virological outcome, in a multi-clinic study. Seven hundred and seventy-eight HIV patients in five clinics in London and Brighton completed a questionnaire on adherence and HIV/health issues at baseline in 2005/6. For 486 subjects taking ART, non-adherence in the past week was defined as: (A)>or=1 dose missed or taken incorrectly (wrong time/circumstances); (B)>or=1 dose missed; (C)>or=2 doses missed. Questionnaire data were matched with routine treatment and virology data for consenting subjects (61.4%). We assessed four virological outcomes in 307 of 486 patients: (i) VL>50c/mL using latest VL at the questionnaire and excluding patients starting HAART<24 weeks ago; (ii) VL>50c/mL using the first VL from 6 to 12 months post-questionnaire; (iii) any VL>50c/mL from 6 to 12 months post-questionnaire; (iv) among patients with VL<50c/mL at questionnaire, time to first subsequent VL>50c/mL over two years follow up. Non-adherence was reported by 278 (57.2%), 102 (21.0%) and 49 (10.1%) of 486 patients, for definitions A, B and C, respectively. Non-adherence declined markedly with older age, and tended to be more commonly reported by Black patients, those born outside the UK, those with greater psychological symptoms and those with suicidal thoughts. There was a weaker association with physical symptoms and no association with gender/sexuality, education, unemployment, or risk behaviour (p>0.1). In logistic regression analyses, younger age, non-UK birth and psychological variables were independent predictors of non-adherence [e.g., for non-adherence B: odds ratios (95% CI) were 0.95 (0.92, 0.98) for every year older age; 1.6 (1.0, 2.5) for non-UK born; 2.3 (1.5, 3.7) for suicidal thoughts]. Non-adherence was associated with poorer virological outcome; the most consistent association was for definition C. Among 255 patients with VL<50c/mL at baseline, non-adherence definition C was independently associated with subsequent VL>50c/mL [adjusted hazard ratio (95% CI) 3.2 (1.5, 7.2)]. Non-UK birth and psychological symptoms predicted non-adherence, but the most striking association was with younger age. Age should be an important consideration in clinical strategies to minimise non-adherence and in decisions regarding ART initiation. A simple measure of non-adherence can identify patients at risk of poorer virological outcome.
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Affiliation(s)
- L Sherr
- Research Department of Infection and Population Health, University College London, London, UK
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Affiliation(s)
- C J Smith
- Research Department of Infection and Population Health, UCL Medical School, Royal Free Campus, Rowland Hill Street, London NW3 2PF, UK
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Affiliation(s)
- C J Smith
- Research Department of Infection and Population Health, UCL Medical School, Royal Free Campus, Rowland Hill Street, London NW32PF, UK.
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Abstract
This overview highlights some of the key issues involved in performing and interpreting hypothesis tests. We describe the general approach taken in performing a hypothesis test with a focus on how to state the null and alternative hypothesis, and why two-sided tests are usually more appropriate than one-sided tests. We describe best practice techniques in performing and presenting the results of hypothesis tests. We recommend that, alongside any p-values, authors should also present estimates of the size of any treatment effects and their confidence intervals. Furthermore, they should specify the exact p-value rather than using terms such as 'NS' or the commonly used asterix notation. We discuss other pitfalls that are encountered at the analysis stage such as the use of repeated observations on individuals, the use of multiple tests on the data and the erroneous use of parametric tests when data are not normally distributed and vice versa. We highlight these points using two different examples: one looking at the use of compression stockings for preventing the occurrence of DVT on long-haul flights and a second hypothetical study comparing laser versus surgery techniques for the removal of varicose veins.
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Affiliation(s)
- C J Smith
- Research Department of Infection and Population Health, UCL Medical School, Royal Free Campus, Rowland Hill Street, London NW3 2PF, UK
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Cambiano V, Lampe FC, Rodger AJ, Smith CJ, Geretti AM, Lodwick RK, Holloway J, Johnson M, Phillips AN. Use of a prescription-based measure of antiretroviral therapy adherence to predict viral rebound in HIV-infected individuals with viral suppression. HIV Med 2010; 11:216-24. [DOI: 10.1111/j.1468-1293.2009.00771.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Dragovic GJ, Smith CJ, Jevtovic DJ, Johnson MA, Ranin J, Salemovic D, Youle MS. Comparison of nucleoside reverse transcriptase inhibitor use as part of first-line therapy in a Serbian and a UK HIV clinic. HIV Clin Trials 2010; 10:306-13. [PMID: 19965332 DOI: 10.1310/hct1005-306] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
BACKGROUND Use of dideoxynucleoside reverse transcriptase inhibitors (dNRTIs) may lead to increased mitochondrial toxicity. We compared nucleoside reverse transcriptase inhibitor (NRTI) use as part of antiretroviral therapy (ART) in two HIV clinics: one in a low-middle income (HIV Centre Belgrade [HCB], Serbia) and one a high income (ICDC, Royal Free Hospital, London, UK) country. METHODS Antiretroviral naïve patients starting ART from 2003 to 2005 were included. Specific NRTIs were compared between centers, focusing on dNRTI use. Kaplan-Meier estimates of the percentage of patients making changes to their NRTI backbone (a) for any reason or (b) for mitochondrial toxicity (peripheral neuropathy, pancreatitis, lactic acidosis) were calculated. RESULTS Of 287 HCB patients, 89 (31.0%) received didanosine (ddI)-containing, 39 (13.6%) stavudine (d4T)-containing, and 39 (13.6%) ddI+d4T-containing regimens; for 539 ICDC patients, these were 18 (3.3%), 66 (12.2%), and 0 (0.0%), respectively (p < .0001). After 12 months, 57.5% and 52.6% at HCB and ICDC had switched their NRTI backbone. This was reduced to 34.5% at HCB after excluding changes due to drug supply interruption and to 11.2% and 1.3% at HCB and ICDC after changes were made for mitochondrial-related reasons. At 6 months, 73/80 (91.3%) and 385/488 (78.9%) had viral load below 50 copies/mL at HCB and ICDC, respectively. CONCLUSION Patients treated at HCB faced higher levels of mitochondrial-related toxicity, likely due to greater dNRTI use.
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Affiliation(s)
- G J Dragovic
- Department of Pharmacology, Clinical Pharmacology, and Toxicology, School of Medicine, University of Belgrade, Belgrade, Serbia.
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Mahungu TW, Smith CJ, Turner F, Egan D, Youle M, Johnson MA, Khoo S, Back DJ, Owen A. Cytochrome P450 2B6 516G→T is associated with plasma concentrations of nevirapine at both 200 mg twice daily and 400 mg once daily in an ethnically diverse population. HIV Med 2009; 10:310-7. [DOI: 10.1111/j.1468-1293.2008.00689.x] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Smith CJ, Phillips AN, Dauer B, Johnson MA, Lampe FC, Youle MS, Tyrer M, Staszewski S. Factors associated with viral rebound among highly treatment-experienced HIV-positive patients who have achieved viral suppression. HIV Med 2009; 10:19-27. [DOI: 10.1111/j.1468-1293.2008.00650.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Sabin CA, Smith CJ, Delpech V, Anderson J, Bansi L, Gilson R, Schwenk A, Leen C, Gazzard B, Porter K, Mackie N, Fisher M, Orkin C, Johnson M, Easterbrook P, Hill T, Phillips AN. The associations between age and the development of laboratory abnormalities and treatment discontinuation for reasons other than virological failure in the first year of highly active antiretroviral therapy. HIV Med 2008; 10:35-43. [PMID: 19018876 DOI: 10.1111/j.1468-1293.2008.00654.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
OBJECTIVE The aim of this study was to describe the relationship between age and the time to treatment discontinuation in the absence of virological failure as well as the development of specific laboratory abnormalities, in patients starting highly active antiretroviral therapy (HAART) for the first time. METHODS Analyses included 8708 antiretroviral-naïve patients from the UK Collaborative HIV Cohort (CHIC) study who started HAART from 1998 onwards. We considered time to the first discontinuation of any drug in the initial HAART regimen for reasons other than virological failure; the association between this and age at the start of HAART was determined using proportional hazards regression after adjustment for potential confounders. The incidence of specific laboratory abnormalities in the first year after starting HAART was compared in those of different ages using multiple logistic regression. RESULTS A total of 2650 patients discontinued at least one drug in their HAART regimen in the first year for reasons other than virological failure; after controlling for confounders, those aged < 30 years at the time of starting HAART were more likely to discontinue than those aged 30-39 years [relative hazard (RH) 1.12; 95% confidence interval (CI) 1.01, 1.24] as were those aged > or = 50 years (RH 1.14; 95% CI 1.00, 1.31). There were strong associations between greater age and raised total cholesterol, decreased haemoglobin and raised triglycerides over the first year, although the latter disappeared after adjustment for pre-HAART levels, suggesting that this finding reflected higher pre-HAART triglyceride levels in older individuals. CONCLUSIONS Continued attempts to improve the tolerability of HAART regimens may help to sustain the good outcomes in all age groups over the longer term.
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Affiliation(s)
- C A Sabin
- Department of Primary Care and Population Science, Royal Free and UC Medical School, London, UK.
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Zhao H, Guan Q, Smith CJ, Quilley J. Increased phosphodiesterase 3A/4B expression after angioplasty and the effect on VASP phosphorylation. Eur J Pharmacol 2008; 590:29-35. [DOI: 10.1016/j.ejphar.2008.05.016] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2007] [Revised: 04/15/2008] [Accepted: 05/19/2008] [Indexed: 11/27/2022]
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Abstract
Diabetes is a risk factor for cancer and specifically colorectal cancer. It is also associated with increased cancer mortality. Aspirin, non-steroidal anti-inflammatory drugs (NSAIDs) and cyclooxygenase 2 (Cox-2) inhibitors have been shown to decrease the incidence of colorectal cancer. This effect may be mediated by inhibiting prostaglandin synthesis. Long-term use of high-dose aspirin and NSAIDs is associated with significant gastrointestinal side effects. Unfortunately, the use of Cox-2 inhibitors is associated with an increased incidence of acute myocardial infarction and death from cardiovascular disease. The increased risk of cardiovascular disease in patients with diabetes results in the loss of the potential to use Cox-2 inhibitors for cancer chemoprophylaxis. Until a safer type of Cox-2 inhibitor is available, or low-dose aspirin is evaluated for chemoprophylaxis, a more intense screening programme for colorectal cancer may be appropriate for patients with diabetes, especially men. Healthcare professionals managing patients with diabetes should be aware of the increased risk of this type of cancer.
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Affiliation(s)
- C J Smith
- Hairmyres Hospital, East Kilbride, UK.
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Madge S, Smith CJ, Lampe F, Sabin CA, Youle M, Johnson MA, Phillips AN. An audit of viral load in one clinical population to describe features of viraemic patients on antiretroviral therapy. HIV Med 2008; 9:208-13. [PMID: 18298577 DOI: 10.1111/j.1468-1293.2008.00548.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
OBJECTIVES To assess the prevalence of an undetectable viral load (VL) (<50 HIV-1 RNA copies/mL) in a clinical population and to identify those viraemic and at risk of failing antiretroviral therapy (ART). METHODS An audit of a complete clinical population on 1 January 2005 via a clinical database and clinical note review. RESULTS On 1 January 2005, 1910 patients were under care; 1229/1332 (92%) of those exposed to ART for >16 weeks had a VL of <50 copies/mL. We examined 49/56 case notes of viraemic patients to identify explanations for viraemia. Common reasons included previous initial mono- or dual therapy, adherence problems, more advanced HIV disease, concomitant medications, physical and mental health issues and being less well linked into the service. A review of these patients' current status on 1 April 2007 showed that six of the 49 had since died. However, of those still alive, 20 (47%) had a VL <500 copies/mL. CONCLUSIONS The proportion of patients on ART with detectable viraemia is low in current clinical practice. New drugs may help those who are failing because of resistance. However, there is a small minority of patients who, for various reasons, appear unable to maintain sufficient adherence to ART.
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Affiliation(s)
- S Madge
- Royal Free Centre for HIV Medicine, Royal Free and University College London Medical School, London, UK.
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Selvarajah JR, Smith CJ, Hulme S, Georgiou RF, Vail A, Tyrrell PJ. Prognosis in patients with transient ischaemic attack (TIA) and minor stroke attending TIA services in the North West of England: the NORTHSTAR Study. J Neurol Neurosurg Psychiatry 2008; 79:38-43. [PMID: 18033799 DOI: 10.1136/jnnp.2007.129163] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BACKGROUND The ABCD2 score predicts stroke risk within a few days of transient ischaemic attack (TIA). It is not clear whether the predictive value of the ABCD2 score can be generalised to UK TIA services, where delayed presentation of TIA and minor stroke are common. We investigated prognosis, and the use of the ABCD2 score, in patients attending TIA services in the North West of England with a diagnosis of TIA or minor stroke. METHODS 711 patients with TIA or minor stroke were prospectively recruited from five centres (median duration from index event to recruitment 15 days). The primary outcome was the composite of incident TIA, stroke, acute coronary syndrome or cardiovascular death at the 3 month follow-up. Prognostic factors were analysed using Cox proportional hazards regression. RESULTS The primary outcome occurred in 126 (18%) patients. Overall, there were 30 incident strokes. At least one incident TIA occurred in 100 patients (14%), but only four had a subsequent stroke. In multifactorial analyses, the ABCD2 score was unrelated to the risk of the primary outcome, but predicted the risk of incident stroke: score 4-5: hazard ratio (HR) 3.4 (95% CI 1.0 to 12); score 6-7: HR 4.8 (1.3 to 18). Of the components of the ABCD2 score, unilateral motor weakness predicted both the primary outcome (HR 1.8 (1.2 to 2.8)) and stroke risk (HR 4.2 (1.3 to 14)). CONCLUSIONS In patients attending typical NHS TIA services, the risk of incident stroke was relatively low, probably reflecting delays to assessment. Current provision of TIA services, where delayed presentation to "rapid access" TIA clinics is common, does not appear to provide an appropriate setting for urgent evaluation, risk stratification or timely secondary prevention for those who may be at highest risk.
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Affiliation(s)
- J R Selvarajah
- Department of Neurology, Leeds General Infirmary, Leeds, UK
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Robertson CM, Jayasuriya AN, Smith CJ, Taylor S, Dufty NE, Berry A, Stradling C. Once-daily darunavir (DRV) used in routine clinical care produces trough DRV drug concentrations in excess of 30× the protein-corrected (PC) EC50 for wild-type HIV. J Int AIDS Soc 2008. [DOI: 10.1186/1758-2652-11-s1-p249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Breen RAM, Leonard O, Perrin FMR, Smith CJ, Bhagani S, Cropley I, Lipman MCI. How good are systemic symptoms and blood inflammatory markers at detecting individuals with tuberculosis? Int J Tuberc Lung Dis 2008; 12:44-49. [PMID: 18173876] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2023] Open
Abstract
SETTING The diagnosis of tuberculosis (TB) may be rejected in the absence of symptoms such as fever, sweats or weight loss. OBJECTIVES To determine how frequently these features and blood test evidence of inflammation were absent in individuals with TB. METHODS Prospective cohort study of 175 unselected subjects diagnosed with TB at a UK TB service between 2003 and 2006. RESULTS Eight (5%) subjects identified by screening and 24 (14%) without culture confirmation were excluded. Of the remaining 143, fever, sweats or weight loss were absent in respectively 37%, 39% and 38%. All three symptoms were absent in 25%. In 88 subjects with pulmonary disease, all three symptoms were absent in 20% (10% of smear-positive cases). Overall, C-reactive protein was normal in 15%, erythrocyte sedimentation rate in 21% and lactate dehydrogenase in 55%. In a multivariable model, factors associated with absent symptoms included drug-resistant TB (adjusted odds ratio [aOR] 3.58, P = 0.004) and female sex (aOR 3.15, P = 0.004). CONCLUSIONS In our population, TB, including pulmonary disease, frequently presented without fever, sweats or weight loss and with normal blood inflammatory markers. This information is of as much relevance to policy makers seeking to improve active case detection as to clinicians and the general public.
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Affiliation(s)
- R A M Breen
- Department of Thoracic Medicine, Royal Free Hospital, London, UK.
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Breen RAM, Barry SM, Smith CJ, Shorten RJ, Dilworth JP, Cropley I, McHugh TD, Gillespie SH, Janossy G, Lipman MCI. Clinical application of a rapid lung-orientated immunoassay in individuals with possible tuberculosis. Thorax 2008; 63:67-71. [PMID: 17675319 DOI: 10.1136/thx.2007.078857] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [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] [Indexed: 11/03/2022]
Abstract
BACKGROUND Immunological ex vivo assays to diagnose tuberculosis (TB) have great potential but have largely been blood-based and poorly evaluated in active TB. Lung sampling enables combined microbiological and immunological testing and uses higher frequency antigen-specific responses than in blood. METHODS A prospective evaluation was undertaken of a flow cytometric assay measuring the percentage of interferon-gamma synthetic CD4+ lymphocytes following stimulation with purified protein derivative of Mycobacterium tuberculosis (PPD) in bronchoalveolar lavage fluid from 250 sputum smear-negative individuals with possible TB. A positive assay was defined as >1.5%. RESULTS Of those who underwent lavage and were diagnosed with active TB, 95% (106/111) had a positive immunoassay (95% CI 89% to 98%). In 139 individuals deemed not to have active TB, 105 (76%) were immunoassay negative (95% CI 68% to 82%). Of the remaining 24% (34 cases) with a positive immunoassay, a substantial proportion had evidence of untreated TB; in two of these active TB was subsequently diagnosed. Assay performance was unaffected by HIV status, disease site or BCG vaccination. In culture-positive pulmonary cases, response to PPD was more sensitive than nucleic acid amplification testing (94% vs 73%). The use of early secretory antigen target-6 (ESAT-6) responses in 71 subjects was no better than PPD, and 19% of those with culture-confirmed TB and a positive PPD immunoassay had no detectable response to ESAT-6. CONCLUSIONS These findings suggest that lung-orientated immunological investigation is a potentially powerful tool in diagnosing individuals with sputum smear-negative active TB, regardless of HIV serostatus.
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Affiliation(s)
- R A M Breen
- Department of Immunology, Royal Free and University College Medical School, London, UK.
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Smith CJ, Lampe FC, Youle M, Johnson MA, Phillips AN. O333 Treatment discontinuation and virological failure amongst HIV-positive individuals starting second-line combination antiretroviral therapy (cART). J Int AIDS Soc 2008. [DOI: 10.1186/1758-2652-11-s1-o37] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Mahungu TW, Else LJ, Smith CJ, Cuthbertson Z, Podlekareva D, Hay P, Dragsted UB, Khoo SH, Johnson MA, Back DJ, Youle M. A study to evaluate the efficacy, safety and tolerability of co-administered lopinavir/ritonavir (LPVr) and nevirapine (NVP) in HIV-infected adults. J Int AIDS Soc 2008. [DOI: 10.1186/1758-2652-11-s1-p6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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