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Eastwood MC, Busby J, Jackson DJ, Pavord ID, Hanratty CE, Djukanovic R, Woodcock A, Walker S, Hardman TC, Arron JR, Choy DF, Bradding P, Brightling CE, Chaudhuri R, Cowan D, Mansur AH, Fowler SJ, Howarth P, Lordan J, Menzies-Gow A, Harrison T, Robinson DS, Holweg CTJ, Matthews JG, Heaney LG. A randomised trial of a T2-composite-biomarker strategy adjusting corticosteroidtreatment in severe asthma, a post- hoc analysis by sex. J Allergy Clin Immunol Pract 2023; 11:1233-1242.e5. [PMID: 36621603 DOI: 10.1016/j.jaip.2022.12.019] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Revised: 12/06/2022] [Accepted: 12/14/2022] [Indexed: 01/07/2023]
Abstract
BACKGROUND Approximately 5-10% of patients with asthma have severe disease with a consistent preponderance in females. Current asthma guidelines recommend stepwise treatment to achieve symptom control with no differential treatment considerations for either sex. OBJECTIVES To examine whether patient sex affects outcomes when using a composite T2-biomarker score to adjust corticosteroid treatment in patients with severe asthma compared to standard care. METHODS Post-hoc analysis stratifying patient outcomes by sex of a 48-week, multicentre, randomised controlled clinical trial comparing a biomarker-defined treatment algorithm with standard care. The primary outcome was the proportion of patients with a reduction in corticosteroid treatment (inhaled (ICS) and oral (OCS) corticosteroids). Secondary outcomes included exacerbation rates, hospital admissions and lung function. RESULTS Of 301 patients randomised; 194 (64.5%) were females and 107 (35.5%) were males. The biomarker algorithm led to a greater proportion of females being on a lower corticosteroid dose vs standard care which was not seen in males (effects estimate females: 3.57, 95% CI: 1.14, 11.18 vs. males 0.54, 95% CI: 0.16, 1.80). In T2-biomarker low females, reducing corticosteroid dose was not associated with increased exacerbations. Females scored higher in all ACQ-7 domains, but with no difference when adjusted for BMI/ anxiety and/or depression. Dissociation between symptoms and T2-biomarkers were noted in both sexes, with a higher proportion of females being symptom high/T2-biomarker low (22.8% vs. 15.6%; p=0.0002), whereas males were symptom low/T2-biomarker high (11.4% vs. 22.3%; p<0.0001). CONCLUSION This exploratory post-hoc analysis identified females achieved a greater benefit from biomarker-directed corticosteroid optimisation versus symptom-directed treatment.
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Affiliation(s)
- M C Eastwood
- Centre for Experimental Medicine, School of Medicine, Dentistry and Biomedical Sciences, Queen's University, Belfast, UK.
| | - J Busby
- Centre for Experimental Medicine, School of Medicine, Dentistry and Biomedical Sciences, Queen's University, Belfast, UK.
| | | | - I D Pavord
- Oxford Respiratory, NIHR BRC, Nuffield Department of Medicine, The University of Oxford, Oxford, UK.
| | - C E Hanratty
- Centre for Experimental Medicine, School of Medicine, Dentistry and Biomedical Sciences, Queen's University, Belfast, UK.
| | - R Djukanovic
- University of Southampton, NIHR Southampton Biomedical Research Centre, Southampton, UK.
| | - A Woodcock
- Division of Infection, Immunity and Respiratory Medicine, University of Manchester, Manchester, UK.
| | - S Walker
- Asthma UK 18 Mansell Street, London, UK.
| | - T C Hardman
- Niche Science & Technology Unit 26, Falstaff House, Bardolph Road, Richmond TW9 2LH.
| | - J R Arron
- Genentech Inc., South San Francisco, California, USA.
| | - D F Choy
- Genentech Inc., South San Francisco, California, USA.
| | - P Bradding
- Department of Infection, Immunity and Inflammation, Institute for Lung Health, University of Leicester, Leicester, UK.
| | - C E Brightling
- Department of Infection, Immunity and Inflammation, Institute for Lung Health, University of Leicester, Leicester, UK.
| | - R Chaudhuri
- NHS Greater Glasgow and Clyde Health Board, Gartnavel Hospital, Glasgow, UK NHS Greater Glasgow and Clyde, Stobhill Hospital, Glasgow, UK.
| | - D Cowan
- NHS Greater Glasgow and Clyde, Stobhill Hospital, Glasgow, UK.
| | - A H Mansur
- University of Birmingham and Heartlands Hospital, Heart of England NHS Foundation Trust, Birmingham, UK.
| | - S J Fowler
- Division of Infection, Immunity and Respiratory Medicine, University of Manchester, Manchester, UK.
| | - P Howarth
- School of Clinical and Experimental Sciences, University of Southampton, NIHR, Southampton Biomedical Research Centre, Southampton, UK.
| | - J Lordan
- The Newcastle upon Tyne NHS Foundation Trust, Newcastle upon Tyne.
| | - A Menzies-Gow
- Royal Brompton & Harefield NHS Foundation Trust, London, UK.
| | - T Harrison
- UK Nottingham Respiratory NIHR Biomedical Research Centre ,University of Nottingham, Nottingham, UK School of Clinical and Experimental Sciences.
| | - D S Robinson
- University College Hospitals NHS Foundation Trust, London, UK.
| | - C T J Holweg
- Genentech Inc., South San Francisco, California, USA.
| | - J G Matthews
- Peter Gorer Department of Immunobiology, Kings College, London; 23andMe, Sunnyvale, California, USA.
| | - L G Heaney
- Centre for Experimental Medicine, School of Medicine, Dentistry and Biomedical Sciences, Queen's University, Belfast, UK.
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Rai P, Johnston SS, Chaudhuri R, Naoumtchik E, Pollack E. Association of Complications with Healthcare Utilization and Hospital-Borne Costs Among Patients Undergoing Open Low Anterior Resection Using Curved Cutter Staplers. Med Devices (Auckl) 2021; 14:87-95. [PMID: 33833593 PMCID: PMC8020124 DOI: 10.2147/mder.s298975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2020] [Accepted: 03/16/2021] [Indexed: 11/25/2022] Open
Abstract
Purpose The ability of curved cutter staplers (CCS) to conform to the complex anatomy of the rectum has led to their widespread use in open low anterior resection (LAR). We describe the incidence of complications and their association with healthcare utilization and hospital-borne costs among patients who underwent open LAR with CCS, with the intent to provide contextual epidemiologic and economic burden data for future evaluations of innovations that may lead to a reduced incidence of complications. Methods Retrospective cohort study using Premier Healthcare Database. Studied patients were ≥18 years who underwent inpatient open LAR with CCS between October 1, 2016 and March 30, 2020 (index admission). Complications of interest included anastomotic leak, bleeding, infection, transfusion, and device complications/adverse incidents during the index admission. Outcomes included index admission hospital length of stay (LOS), non-home discharge status, total operating room (OR) time, total hospital-borne costs, and all-cause readmissions within 30, 60, and 90 days post discharge from index admission. Multivariable regression models were used to compare outcomes between patients with vs without any complication of interest. Results The study included 618 patients with a mean age of 61 years, of whom 57% were males. The incidence proportion of any complication during the index admission for open LAR with CCS was 28% (95% CI: [23.9%, 31.0%], n=170). As compared with patients experiencing no complications, those with a complication had higher adjusted mean total hospital costs ($38,159 vs $22,303, p<0.001), non-home discharge status (21.8% vs 9.2%, p=0.004), mean LOS (13 days vs 6 days, p<0.001), and mean OR time (362 mins vs 291 mins, p<0.001). There were no significant differences in all-cause readmissions between patients with vs without complications. Conclusion Among patients undergoing open LAR with CCS, over a quarter of patients experienced a complication, resulting in a substantial burden to the healthcare system.
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Affiliation(s)
- Pragya Rai
- Epidemiology Medical Devices, Johnson & Johnson, New Brunswick, NJ, USA
| | | | | | - Elena Naoumtchik
- Health Economics and Market Access, Ethicon, Somerville, NJ, USA
| | - Esther Pollack
- Health Economics and Market Access, Ethicon, Somerville, NJ, USA
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Fortin SP, Johnston SS, Chaudhuri R, Fryrear R, Roy S. Incidence, predictors, and economic burden of circular anastomotic complications in left-sided colorectal reconstructions involving manual circular staplers. J Med Econ 2021; 24:255-265. [PMID: 33576292 DOI: 10.1080/13696998.2021.1880749] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
STUDY AIM Manual circular staplers are widely used in colorectal surgery; however, limited literature exists examining complications related to circular anastomoses when such devices are used. The present study evaluated the incidence, predictors, and economic burden of circular anastomotic complications in left-sided colorectal reconstructions involving manual circular staplers. MATERIALS AND METHODS Patients aged ≥18 years who underwent hemicolectomy, low anterior resection, or sigmoidectomy between 1 October 2016 and 31 December 2018 were identified from the Premier Healthcare Database. Manual circular stapler use was identified from hospital administrative billing records. Circular anastomotic complications were defined as a composite endpoint of multiple circular stapler use (proxy for stapler failure) or other circular anastomotic complications (anastomotic leak, bleeding, device/surgical complications, infection, and transfusion). Multivariable analyses were used to model the associations between circular anastomotic complications and total hospital costs, length of stay, operating room time, and 30-, 60-, and 90-day readmission rates. RESULTS A total of 13,167 patients met the study criteria, of whom 2,984 (22.7%) had circular anastomotic complications. Predictors of circular anastomotic complications included age, procedure type, provider region, and select patient comorbidities. As compared with those who did not, patients who suffered circular anastomotic complications had significantly higher adjusted total hospital costs ($26,924 vs. $18,748; p < .0001), length of stay (7.79 vs. 4.99 days; p < .0001), operating room time (280 vs. 239 min; p < .0001), non-home discharge status (9.63% vs. 4.61%; p < .0001), and all-cause readmission at 30 days (12.2% vs. 8.7%; p < .0001), 60 days (16.0% vs. 11.6%; p < .0001), and 90 days (18.5% vs. 13.4%; p < .0001). LIMITATIONS The present study is limited by the observational nature and potential for measurement error that is inherent to administrative healthcare databases. CONCLUSIONS In this analysis of patients undergoing left-sided colorectal reconstructions involving a manual circular stapler, circular anastomotic complications were associated with adverse economic consequences.
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Affiliation(s)
- Stephen P Fortin
- Medical Devices - Epidemiology, Johnson & Johnson Co., New Brunswick, NJ, USA
| | - Stephen S Johnston
- Medical Devices - Epidemiology, Johnson & Johnson Co., New Brunswick, NJ, USA
| | | | - Raymond Fryrear
- Preclinical, Clinical, Medical Centre, Ethicon Inc., Cincinnati, OH, USA
| | - Sanjoy Roy
- Franchise Health Economics and Market Access, Ethicon Inc., Cincinnati, OH, USA
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Swindell W, Meyer T, Premi S, Bojanowski K, Chaudhuri R. 851 Acetyl zingerone opposes deleterious effects of skin aging by bolstering matrisome synthesis, neutralizing oxidative stress and inhibiting DNA damage. J Invest Dermatol 2020. [DOI: 10.1016/j.jid.2020.03.867] [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: 10/24/2022]
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Chaudhuri R, Ramachandran M, Moharil P, Harumalani M, Jaiswal AK. Biomaterials and cells for cardiac tissue engineering: Current choices. Materials Science and Engineering: C 2017. [DOI: 10.1016/j.msec.2017.05.121] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Ma S, Gobis K, Swindell WR, Chaudhuri R, Bojanowski R, Bojanowski K. Synthesis and activity of the salicylic acid ester of bakuchiol in psoriasis-surrogate keratinocytes and skin substitutes. Clin Exp Dermatol 2017; 42:251-260. [PMID: 28052368 DOI: 10.1111/ced.13024] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/31/2016] [Indexed: 11/30/2022]
Abstract
BACKGROUND Topical retinoids are effective in retarding skin ageing and restoring homeostasis in skin conditions such as psoriasis. However their adverse effects (AEs), which include irritation (retinoid dermatitis), photosensitivity and teratogenicity, limit their use and patient compliance. Development of retinoid analogues with minimal AEs would allow a broader and more compliant use. AIM To synthesise a novel molecule, bakuchiol salicylate (bakusylan), with a modulatory gene expression profile similar to retinoids, using as reference three prescription retinoids: tretinoin, tazarotene and adapalene. METHODS We hypothesized that because bakuchiol salicylate has a structure entirely different from existing retinoids, there would be at least a partial uncoupling of AEs from the skin-normalizing activity of this retinoid. This hypothesis was tested at the transcriptional level in psoriatic cytokine-treated cultures of keratinocytes and organotypic skin substitutes, using DNA microarrays and custom PCR arrays. RESULTS Evaluation of the gene expression profile of bakuchiol salicylate revealed elimination of several components of the retinoid-like proinflammatory response and teratogenic signature, without a substantial loss of normalizing potential. A possible mechanism of action, consisting of keratinocyte desensitization to psoriatic cytokine signalling through inhibition of the signal transducer and regulator of transcription (STAT)1/3/interferon inflammatory signal transduction axis was also identified. CONCLUSION Bipartite materials obtained by merging two skin-active entities with specific, complementary bioactivities, such as bakuchiol and salicylic acid, may yield a new class of functional retinoids.
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Affiliation(s)
- S Ma
- Sunny BioDiscovery, Inc., Santa Paula, CA, USA
| | - K Gobis
- Department of Organic Chemistry, Medical University of Gdańsk, Gdańsk, Poland
| | | | | | - R Bojanowski
- Sunny BioDiscovery, Inc., Santa Paula, CA, USA.,Polish Academy of Sciences, Institute of Oceanology, Sopot, Poland
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Chaudhuri R, Thomson NC, McCallum C, O’Pray H, Barclay ST, Murray D, MacBride-Stewart S, Sharma V, Shepherd M, Lee WT. P125 A primary care audit on asthma patients with frequent exacerbations and the potential impact of national review of asthma deaths (NRAD) recommendations. Thorax 2016. [DOI: 10.1136/thoraxjnl-2016-209333.268] [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: 11/04/2022]
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Morrison D, Wyke S, Saunderson K, McConnachie A, Agur K, Chaudhuri R, Thomas M, Thomson NC, Yardley L, Mair FS. Findings from a pilot Randomised trial of an Asthma Internet Self-management Intervention (RAISIN). BMJ Open 2016; 6:e009254. [PMID: 27173807 PMCID: PMC4874112 DOI: 10.1136/bmjopen-2015-009254] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
OBJECTIVE To evaluate the feasibility of a phase 3 randomised controlled trial (RCT) of a website (Living Well with Asthma) to support self-management. DESIGN AND SETTING Phase 2, parallel group, RCT, participants recruited from 20 general practices across Glasgow, UK. Randomisation through automated voice response, after baseline data collection, to website access for minimum 12 weeks or usual care. PARTICIPANTS Adults (age≥16 years) with physician diagnosed, symptomatic asthma (Asthma Control Questionnaire (ACQ) score ≥1). People with unstable asthma or other lung disease were excluded. INTERVENTION 'Living Well with Asthma' is a desktop/laptop compatible interactive website designed with input from asthma/ behaviour change specialists, and adults with asthma. It aims to support optimal medication management, promote use of action plans, encourage attendance at asthma reviews and increase physical activity. OUTCOME MEASURES Primary outcomes were recruitment/retention, website use, ACQ and mini-Asthma Quality of Life Questionnaire (AQLQ). Secondary outcomes included patient activation, prescribing, adherence, spirometry, lung inflammation and health service contacts after 12 weeks. Blinding postrandomisation was not possible. RESULTS Recruitment target met. 51 participants randomised (25 intervention group). Age range 16-78 years; 75% female; 28% from most deprived quintile. 45/51 (88%; 20 intervention group) followed up. 19 (76% of the intervention group) used the website, for a mean of 18 min (range 0-49). 17 went beyond the 2 'core' modules. Median number of logins was 1 (IQR 1-2, range 0-7). No significant difference in the prespecified primary efficacy measures of ACQ scores (-0.36; 95% CI -0.96 to 0.23; p=0.225), and mini-AQLQ scores (0.38; -0.13 to 0.89; p=0.136). No adverse events. CONCLUSIONS Recruitment and retention confirmed feasibility; trends to improved outcomes suggest use of Living Well with Asthma may improve self-management in adults with asthma and merits further development followed by investigation in a phase 3 trial. TRIAL REGISTRATION NUMBER ISRCTN78556552; Results.
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Affiliation(s)
- D Morrison
- General Practice & Primary Care, Institute of Health & Wellbeing, University of Glasgow, Glasgow, UK
| | - S Wyke
- Institute of Health and Wellbeing/Interdisciplinary Research Professor, College of Social Sciences, University of Glasgow, Glasgow, UK
| | - K Saunderson
- General Practice & Primary Care, Institute of Health & Wellbeing, University of Glasgow, Glasgow, UK
| | - A McConnachie
- Institute of Health and Wellbeing/Interdisciplinary Research Professor, College of Social Sciences, University of Glasgow, Glasgow, UK Robertson Centre for Biostatistics, Institute of Health and Wellbeing, University of Glasgow, Glasgow, UK
| | - K Agur
- General Practice & Primary Care, Institute of Health & Wellbeing, University of Glasgow, Glasgow, UK
| | - R Chaudhuri
- Institute of Infection, Immunity and Inflammation, Gartnavel General Hospital, University of Glasgow, Glasgow, UK
| | - M Thomas
- Primary Care Research, Aldermoor Health Centre, University of Southampton, Southampton, UK
| | - N C Thomson
- Institute of Infection, Immunity and Inflammation, Gartnavel General Hospital, University of Glasgow, Glasgow, UK
| | - L Yardley
- Department of Psychology, University of Southampton, Southampton, UK
| | - F S Mair
- General Practice & Primary Care, Institute of Health & Wellbeing, University of Glasgow, Glasgow, UK
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McSharry C, Vesper S, Wymer L, Howieson S, Chaudhuri R, Wright GR, Thomson NC. Decreased FEV1 % in asthmatic adults in Scottish homes with high Environmental Relative Moldiness Index values. Clin Exp Allergy 2015; 45:902-907. [PMID: 25580663 PMCID: PMC7162076 DOI: 10.1111/cea.12482] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [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: 08/05/2014] [Revised: 11/18/2014] [Accepted: 11/21/2014] [Indexed: 02/06/2023]
Abstract
BACKGROUND Exposures to indoor biological contaminants have been implicated in asthma's aetiology but their effect on lung function is not well quantified. OBJECTIVE The aim of this cross-sectional study of non-smoking, asthmatic adults in Scotland was to determine the correlation between the results from a standard spirometry test, forced expiratory volume in one-second percent (FEV1 %), and quantitative estimates of some biological exposures. METHODS A population (n = 55) of non-smoking, adult asthmatics in Scotland was included in this study and each completed a questionnaire that allowed the determination of the Asthma Control Questionnaire scores (ACQ) and St. George's Respiratory Questionnaire scores (SGRQ), as well as corticosteroid use. Spirometry testing was completed and the pre-bronchodilator FEV1 % value calculated. At about the same time, floor dust samples were collected in the living room and in the bedroom. These dust samples were analysed for mould contamination, as described by the Environmental Relative Moldiness Index (ERMI) values and by (1, 3)-β-D-glucan concentrations, for endotoxin, and for dust mite, cat, and dog allergen concentrations. The asthmatics' FEV1 % values were tested for correlation (Pearson) to questionnaire-based estimates of health. Also, each biological exposure was tested for correlation (Pearson) to the FEV1 % values. RESULTS FEV1 % results were correlated with ACQ scores (ρ -0.586, P < 0.001), SGRQ scores (ρ -0.313, P = 0.020), and weakly with corticosteroid use (ρ -0.221, P = 0.105). The ERMI values in the homes (average 5.3) were significantly correlated with FEV1 % values (ρ -0.378, P = 0.004). There was no correlation between FEV1 % and concentrations of endotoxin, (1, 3)-β-D-glucan, or any of the allergens. CONCLUSION AND CLINICAL RELEVANCE Although these results do not prove that mould exposures caused the deficit in lung function observed in this study, it might be advisable for asthmatics to avoid high ERMI environments.
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Affiliation(s)
- C McSharry
- Institute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow, UK
| | - S Vesper
- National Exposure Research Laboratory, United States Environmental Protection Agency, Cincinnati, OH, USA
| | - L Wymer
- National Exposure Research Laboratory, United States Environmental Protection Agency, Cincinnati, OH, USA
| | - S Howieson
- Department of Architecture and Building Science, University of Strathclyde, Glasgow, Glasgow, UK
| | - R Chaudhuri
- Institute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow, UK
| | - G R Wright
- Institute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow, UK
| | - N C Thomson
- Institute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow, UK
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Chaudhuri R, Menzies-Gow A, Khachi H, Hand S, Gore R, Niven R. S94 A Prospective Study Investigating Oral Corticosteroid (ocs) Use And Quality Of Life In Omalizumab Treated Severe Allergic Asthma Patients - Results From An Interim Analysis Of The Apex Ii Study. Thorax 2014. [DOI: 10.1136/thoraxjnl-2014-206260.100] [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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Thomson NC, Chaudhuri R, Spears M, Messow CM, Jelinsky S, Miele G, Nocka K, Takahashi E, Hilmi OJ, Shepherd MC, Miller DK, McSharry C. Arachidonic acid metabolites and enzyme transcripts in asthma are altered by cigarette smoking. Allergy 2014; 69:527-36. [PMID: 24571371 DOI: 10.1111/all.12376] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/16/2014] [Indexed: 01/18/2023]
Abstract
BACKGROUND Arachidonic acid metabolites are implicated in the pathogenesis of asthma although only limited information is available on the impact of current smoking history on these metabolites. The aim of the study was to examine the effect of smoking status on urinary, sputum, and plasma eicosanoid concentrations and relevant enzyme transcripts in asthma. METHODS In 108 smokers and never smokers with asthma and 45 healthy controls [smokers and never smokers], we measured urinary tetranor prostaglandin (PG)D2 (PGDM) and leukotriene (LT)E4 , induced sputum fluid LTB4 , LTE4 , PGD2 , and PGE2 , plasma secretory phospholipase A2 (sPLA2 ), and 11β prostaglandin F2α (11βPGF2α ), and, in a subgroup with severe asthma, airway leukocyte and epithelial cell mRNA expression levels of arachidonic acid metabolic enzymes. RESULTS Smokers with asthma had higher urinary LTE4 ; 83 (59, 130) vs 59 (40, 90) pg/mg creatinine, P = 0.008, and PGDM; 60 (35, 100) vs 41 (28, 59) ng/mg creatinine, P = 0.012 concentrations, respectively, and lower sputum PGE2 concentrations 80 (46, 157) vs 192 (91, 301) pg/ml, P = 0.001 than never smokers with asthma. Sputum LTB4 (P = 0.013), and plasma 11βPGF2α (P = 0.032), concentrations, respectively, were increased in smokers with asthma compared with healthy smokers. Asthma-specific and smoking-related increases (>1.5-fold expression) in arachidonate 15-lipoxygenase and gamma-glutamyltransferase transcripts were demonstrated. CONCLUSIONS Several arachidonic acid metabolites and enzyme transcripts involving both lipoxygenase and cyclooxygenase pathways are increased in smokers with asthma and differ from never smokers with asthma. Possibly targeting specific lipoxygenase and cyclooxygenase pathways that are activated by asthma and cigarette smoking may optimize therapeutic responses.
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Affiliation(s)
- N. C. Thomson
- Institute of Infection, Immunity & Inflammation; University of Glasgow; Glasgow UK
| | - R. Chaudhuri
- Institute of Infection, Immunity & Inflammation; University of Glasgow; Glasgow UK
| | - M. Spears
- Institute of Infection, Immunity & Inflammation; University of Glasgow; Glasgow UK
| | - C. M. Messow
- Robertson Centre for Biostatistics; University of Glasgow; Glasgow UK
| | - S. Jelinsky
- Pfizer Research/Translational Medicine Research Collaboration; Dundee and Sandwich UK
- Pfizer Research/Translational Medicine Research Collaboration; Cambridge MA USA
- Pfizer Research/Translational Medicine Research Collaboration; Collegeville PA USA
| | - G. Miele
- Pfizer Research/Translational Medicine Research Collaboration; Dundee and Sandwich UK
- Pfizer Research/Translational Medicine Research Collaboration; Cambridge MA USA
- Pfizer Research/Translational Medicine Research Collaboration; Collegeville PA USA
| | - K. Nocka
- Pfizer Research/Translational Medicine Research Collaboration; Dundee and Sandwich UK
- Pfizer Research/Translational Medicine Research Collaboration; Cambridge MA USA
- Pfizer Research/Translational Medicine Research Collaboration; Collegeville PA USA
| | | | - O. J. Hilmi
- Ear, Nose & Throat Department; NHS Greater Glasgow and Clyde; Glasgow UK
| | - M. C. Shepherd
- Institute of Infection, Immunity & Inflammation; University of Glasgow; Glasgow UK
| | - D. K. Miller
- Pfizer Research/Translational Medicine Research Collaboration; Dundee and Sandwich UK
- Pfizer Research/Translational Medicine Research Collaboration; Cambridge MA USA
- Pfizer Research/Translational Medicine Research Collaboration; Collegeville PA USA
| | - C. McSharry
- Institute of Infection, Immunity & Inflammation; University of Glasgow; Glasgow UK
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Chaudhuri R, Norris V, Kelly K, Zhu CQ, Ambery C, Lafferty J, Cameron E, Thomson NC. Effects of a FLAP inhibitor, GSK2190915, in asthmatics with high sputum neutrophils. Pulm Pharmacol Ther 2013; 27:62-9. [PMID: 24333186 DOI: 10.1016/j.pupt.2013.11.007] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/12/2013] [Revised: 11/19/2013] [Accepted: 11/30/2013] [Indexed: 11/18/2022]
Abstract
Patients with refractory asthma frequently have neutrophilic airway inflammation and respond poorly to inhaled corticosteroids. This study evaluated the effects of an oral 5-lipoxygenase-activating protein (FLAP) inhibitor, GSK2190915, in patients with asthma and elevated sputum neutrophils. Patients received 14 (range 13-16) days treatment with GSK2190915 100 mg and placebo with a minimum 14 day washout in a double-blind, cross-over, randomised design (N = 14). Sputum induction was performed twice pre-dose in each treatment period to confirm sputum neutrophilia, and twice at the end of each treatment period. The primary endpoint was the percentage and absolute sputum neutrophil count, averaged for end-of-treatment visits. GSK2190915 did not significantly reduce mean percentage sputum neutrophils (GSK2190915-placebo difference [95% CI]: -0.9 [-12.0, 10.3]), or mean sputum neutrophil counts (GSK2190915/placebo ratio [95% CI]: 1.06 [0.43, 2.61]). GSK2190915 resulted in a marked suppression (>90%) of sputum LTB4 and urine LTE4, but did not alter clinical endpoints. There were no safety issues. Despite suppressing the target mediator LTB4, FLAP inhibitor GSK2190915 had no short-term effect on sputum cell counts or clinical endpoints in patients with asthma and sputum neutrophilia.
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Affiliation(s)
- R Chaudhuri
- Institute of Infection, Immunity & Inflammation, University of Glasgow and Respiratory Medicine, Gartnavel General Hospital, Glasgow, UK.
| | - V Norris
- Immuno-Inflammation Therapy Area, GlaxoSmithKline, Stevenage, UK
| | - K Kelly
- Clinical Pharmacology Science and Study Operations, GlaxoSmithKline, Uxbridge, UK
| | - C-Q Zhu
- Clinical Statistics, GlaxoSmithKline, Uxbridge, UK
| | - C Ambery
- Clinical Pharmacology Modelling and Simulation, GlaxoSmithKline, Uxbridge, UK
| | - J Lafferty
- Institute of Infection, Immunity & Inflammation, University of Glasgow and Respiratory Medicine, Gartnavel General Hospital, Glasgow, UK
| | - E Cameron
- Institute of Infection, Immunity & Inflammation, University of Glasgow and Respiratory Medicine, Gartnavel General Hospital, Glasgow, UK
| | - N C Thomson
- Institute of Infection, Immunity & Inflammation, University of Glasgow and Respiratory Medicine, Gartnavel General Hospital, Glasgow, UK
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Cameron EJ, McSharry C, Chaudhuri R, Farrow S, Thomson NC. Long-term macrolide treatment of chronic inflammatory airway diseases: risks, benefits and future developments. Clin Exp Allergy 2013; 42:1302-12. [PMID: 22925316 DOI: 10.1111/j.1365-2222.2012.03979.x] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Macrolide antibiotics were discovered over 50 years ago and following their use as antimicrobials it became apparent that this group of antibiotics also possessed anti-inflammatory properties. Subsequent clinical trials showed benefits of macrolides as long-term adjuncts in the treatment of a spectrum of chronic inflammatory respiratory diseases, particularly diffuse panbronchiolitis, cystic fibrosis, post-transplant bronchiolitis obliterans and more recently chronic obstructive pulmonary disease (COPD). The evidence for efficacy of macrolides in the long-term treatment of chronic asthma and bronchiectasis is less well established. The mechanism(s) of action of macrolides in the treatment of these diseases remains unexplained, but may be due to their antibacterial and/or anti-inflammatory actions, which include reductions in interleukin-8 production, neutrophil migration and/or function. Macrolides have additional potentially beneficial properties including anti-viral actions and an ability to restore corticosteroid sensitivity. The increased prescribing of macrolides for long-term treatment could result in the development of microbial resistance and adverse drug effects. New macrolides have been developed which do not possess any antimicrobial activity and hence lack the ability to produce microbial resistance, but which still retain immunomodulatory effects. Potentially novel macrolides may overcome a significant barrier to the use of this type of drug for the long-term treatment of chronic inflammatory airway diseases.
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Affiliation(s)
- E J Cameron
- Respiratory Medicine, Institute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow, UK.
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15
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Cameron EJ, McSharry C, Chaudhuri R, Farrow S, Thomson NC. Long-term macrolide treatment of chronic inflammatory airway diseases: risks, benefits and future developments. Clin Exp Allergy 2013. [PMID: 22925316 DOI: 10.1111/j.13652222.2012.03979.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Macrolide antibiotics were discovered over 50 years ago and following their use as antimicrobials it became apparent that this group of antibiotics also possessed anti-inflammatory properties. Subsequent clinical trials showed benefits of macrolides as long-term adjuncts in the treatment of a spectrum of chronic inflammatory respiratory diseases, particularly diffuse panbronchiolitis, cystic fibrosis, post-transplant bronchiolitis obliterans and more recently chronic obstructive pulmonary disease (COPD). The evidence for efficacy of macrolides in the long-term treatment of chronic asthma and bronchiectasis is less well established. The mechanism(s) of action of macrolides in the treatment of these diseases remains unexplained, but may be due to their antibacterial and/or anti-inflammatory actions, which include reductions in interleukin-8 production, neutrophil migration and/or function. Macrolides have additional potentially beneficial properties including anti-viral actions and an ability to restore corticosteroid sensitivity. The increased prescribing of macrolides for long-term treatment could result in the development of microbial resistance and adverse drug effects. New macrolides have been developed which do not possess any antimicrobial activity and hence lack the ability to produce microbial resistance, but which still retain immunomodulatory effects. Potentially novel macrolides may overcome a significant barrier to the use of this type of drug for the long-term treatment of chronic inflammatory airway diseases.
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Affiliation(s)
- E J Cameron
- Respiratory Medicine, Institute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow, UK.
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16
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Thomson NC, Chaudhuri R, Heaney LG, Bucknall C, Niven RM, Brightling CE, Menzies-Gow AN, Mansur AH, McSharry C. S61 Clinical Outcomes and Inflammatory Biomarkers in Current Smokers and Ex-Smokers with Severe Asthma. Thorax 2012. [DOI: 10.1136/thoraxjnl-2012-202678.067] [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: 11/04/2022]
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17
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Bicknell S, Chaudhuri R, Shepherd M, Lee N, Pitman N, Spears M, Cameron E, Cowan D, Nixon J, Thompson J, Thomson NC. P5 Introducing Bronchial Thermoplasty Treatment into a Severe Asthma Clinical Service: Abstract P5 Table 1. Thorax 2012. [DOI: 10.1136/thoraxjnl-2012-202678.146] [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: 11/03/2022]
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18
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Zoumot Z, Kemp S, Chaudhuri R, Caneja C, Bicknell S, Hopkinson N, Singh S, Ross E, Shah P. S53 Outcomes of the RePneu Endobronchial Coils For the Treatment of Severe Emphysema with HyperinflaTion (RESET) Trial: Abstract S53 Table 1. Thorax 2012. [DOI: 10.1136/thoraxjnl-2012-202678.059] [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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19
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Komai‐Koma M, Brombacher F, Pushparaj PN, Arendse B, McSharry C, Alexander J, Chaudhuri R, Thomson NC, McKenzie ANJ, McInnes I, Liew FY, Xu D. Interleukin-33 amplifies IgE synthesis and triggers mast cell degranulation via interleukin-4 in naïve mice. Allergy 2012; 67:1118-26. [PMID: 22702477 PMCID: PMC3660789 DOI: 10.1111/j.1398-9995.2012.02859.x] [Citation(s) in RCA: 109] [Impact Index Per Article: 9.1] [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] [Accepted: 05/11/2012] [Indexed: 11/30/2022]
Abstract
Background The regulation and function of IgE in healthy individuals and in antigen-naïve animals is not well understood. IL-33 administration increases serum IgE in mice with unknown mechanism. We tested the hypothesis that IL-33 provides an antigen-independent stimulus for IgE production and mast cell degranulation. Methods IL-33 was administered to naïve wild-type (WT), nude and ST2−/−, IL-4−/−, IL4Rα−/− and T-or B-cell-specific IL-4Rα−/− mice. IgEand cytokines were quantified by ELISA. T- and B-lymphocyte numbers and CD40L expression were determined by flow cytometry. Anaphylaxis was measured by temperature, mast cell degranulation and histamine release. Results IL-33 enhanced IgE production in naïve WT, T-IL-4Rα−/− but not in ST2−/−, IL-4−/−, IL-4Rα−/− or B-cell-specific IL-4Rα−/− mice, demonstrating IL-33 specificity and IL-4 dependency. Moreover, IL-4 was required for IL-33-induced B-cell proliferation and T-cell CD40L expression, which promotes IgE production. IL-33-induced IL-4 production was mainly from innate cells including mast cells and eosinophils. IL-33 increased mast cell surface IgE and triggered degranulation and systemic anaphylaxis in allergen-naïve WT but not in IL-4Rα−/− mice. Conclusion IL-33 amplifies IgE synthesis and triggers anaphylaxis in naïve mice via IL-4, independent of allergen. IL-33 may play an important role in nonatopic allergy and idiopathic anaphylaxis.
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Affiliation(s)
- M. Komai‐Koma
- Institute of Infection, Immunity and Inflammation University of Glasgow Glasgow UK
| | - F. Brombacher
- Institute of Infectious Disease and Molecular Medicine University of Cape Town and International Center for Genetic Engineering and Biotechnology Cape Town South Africa
| | - P. N. Pushparaj
- Center of Excellence in Genomic Medicine Research King Abdulaziz University Jeddah Saudi Arabia
| | - B. Arendse
- Institute of Infectious Disease and Molecular Medicine University of Cape Town and International Center for Genetic Engineering and Biotechnology Cape Town South Africa
| | - C. McSharry
- Institute of Infection, Immunity and Inflammation University of Glasgow Glasgow UK
| | - J. Alexander
- Strathclyde Institute of Pharmacy and Biomedical Sciences University of Strathclyde Glasgow UK
| | - R. Chaudhuri
- Institute of Infection, Immunity and Inflammation University of Glasgow Glasgow UK
| | - N. C. Thomson
- Institute of Infection, Immunity and Inflammation University of Glasgow Glasgow UK
| | - A. N. J. McKenzie
- Medical Research Council Laboratory of Molecular Biology Cambridge UK
| | - I. McInnes
- Institute of Infection, Immunity and Inflammation University of Glasgow Glasgow UK
| | - F. Y. Liew
- Institute of Infection, Immunity and Inflammation University of Glasgow Glasgow UK
- Center of Excellence in Genomic Medicine Research King Abdulaziz University Jeddah Saudi Arabia
| | - D. Xu
- Institute of Infection, Immunity and Inflammation University of Glasgow Glasgow UK
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20
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Wan YI, Shrine NRG, Soler Artigas M, Wain LV, Blakey JD, Moffatt MF, Bush A, Chung KF, Cookson WOCM, Strachan DP, Heaney L, Al-Momani BAH, Mansur AH, Manney S, Thomson NC, Chaudhuri R, Brightling CE, Bafadhel M, Singapuri A, Niven R, Simpson A, Holloway JW, Howarth PH, Hui J, Musk AW, James AL, Brown MA, Baltic S, Ferreira MAR, Thompson PJ, Tobin MD, Sayers I, Hall IP. Genome-wide association study to identify genetic determinants of severe asthma. Thorax 2012; 67:762-8. [PMID: 22561531 DOI: 10.1136/thoraxjnl-2011-201262] [Citation(s) in RCA: 138] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BACKGROUND The genetic basis for developing asthma has been extensively studied. However, association studies to date have mostly focused on mild to moderate disease and genetic risk factors for severe asthma remain unclear. OBJECTIVE To identify common genetic variants affecting susceptibility to severe asthma. METHODS A genome-wide association study was undertaken in 933 European ancestry individuals with severe asthma based on Global Initiative for Asthma (GINA) criteria 3 or above and 3346 clean controls. After standard quality control measures, the association of 480 889 genotyped single nucleotide polymorphisms (SNPs) was tested. To improve the resolution of the association signals identified, non-genotyped SNPs were imputed in these regions using a dense reference panel of SNP genotypes from the 1000 Genomes Project. Then replication of SNPs of interest was undertaken in a further 231 cases and 1345 controls and a meta-analysis was performed to combine the results across studies. RESULTS An association was confirmed in subjects with severe asthma of loci previously identified for association with mild to moderate asthma. The strongest evidence was seen for the ORMDL3/GSDMB locus on chromosome 17q12-21 (rs4794820, p=1.03×10((-8)) following meta-analysis) meeting genome-wide significance. Strong evidence was also found for the IL1RL1/IL18R1 locus on 2q12 (rs9807989, p=5.59×10((-8)) following meta-analysis) just below this threshold. No novel loci for susceptibility to severe asthma met strict criteria for genome-wide significance. CONCLUSIONS The largest genome-wide association study of severe asthma to date was carried out and strong evidence found for the association of two previously identified asthma susceptibility loci in patients with severe disease. A number of novel regions with suggestive evidence were also identified warranting further study.
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Affiliation(s)
- Y I Wan
- Therapeutics and Molecular Medicine, University of Nottingham, Nottingham, UK.
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21
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Morrison D, Cameron E, Braganza G, Thomson NC, Chaudhuri R, Mair FS. P205 Managing the challenges of recruitment of patients with asthma to randomised controlled trials. Thorax 2011. [DOI: 10.1136/thoraxjnl-2011-201054c.205] [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: 11/04/2022]
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22
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Spears M, Dewet C, McSharry C, Chaudhuri R, Donnelly I, Jolly L, Cameron E, Thomson NC. S122 Sputum cytokine profiles in asthma and the impact of smoking-a factor analysis. Thorax 2011. [DOI: 10.1136/thoraxjnl-2011-201054b.122] [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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23
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Churchland AK, Kiani R, Chaudhuri R, Wang XJ, Pouget A, Shadlen MN. Variance as a signature of neural computations during decision making. Neuron 2011; 69:818-31. [PMID: 21338889 DOI: 10.1016/j.neuron.2010.12.037] [Citation(s) in RCA: 223] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/03/2010] [Indexed: 10/18/2022]
Abstract
Traditionally, insights into neural computation have been furnished by averaged firing rates from many stimulus repetitions or trials. We pursue an analysis of neural response variance to unveil neural computations that cannot be discerned from measures of average firing rate. We analyzed single-neuron recordings from the lateral intraparietal area (LIP), during a perceptual decision-making task. Spike count variance was divided into two components using the law of total variance for doubly stochastic processes: (1) variance of counts that would be produced by a stochastic point process with a given rate, and loosely (2) the variance of the rates that would produce those counts (i.e., "conditional expectation"). The variance and correlation of the conditional expectation exposed several neural mechanisms: mixtures of firing rate states preceding the decision, accumulation of stochastic "evidence" during decision formation, and a stereotyped response at decision end. These analyses help to differentiate among several alternative decision-making models.
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Affiliation(s)
- Anne K Churchland
- Department of Physiology and Biophysics, University of Washington Medical School, National Primate Research Center, Seattle, WA 98195-7290, USA.
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Spears M, McSharry C, Donnelly I, Jolly L, Brannigan M, Thomson J, Lafferty J, Chaudhuri R, Shepherd M, Cameron E, Thomson NC. Peripheral blood dendritic cell subtypes are significantly elevated in subjects with asthma. Clin Exp Allergy 2011; 41:665-72. [PMID: 21338429 DOI: 10.1111/j.1365-2222.2010.03692.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
BACKGROUND Dendritic cells (DCs) are crucial for the processing of antigens, T lymphocyte priming and the development of asthma and allergy. Smokers with asthma display altered therapeutic behaviour and a reduction in endobronchial DC CD83 expression compared with non-smokers with asthma. No information is available on the impact of smoking on peripheral blood DC profiles. OBJECTIVE Determine peripheral blood DC profiles in subjects with and without asthma with differing smoking histories. METHODS Forty-three asthmatics (17 smokers, nine ex-smokers and 17 never-smokers) and 16 healthy volunteers (nine smokers and seven never-smokers) were recruited. Spirometry, exhaled nitric oxide and venesection was performed. DC elution was by flow cytometry via the expression of DC surface markers [plasmacytoid (pDC) (BDCA-2, CD303), type 1 conventional (cDC) (BDCA-1, CD1c), and type 2 cDC (BDCA-3, CD141)]. RESULTS Subjects with asthma displayed increases in all DC subtypes compared with normal never-smokers: [type 1 cDCs - asthma [median% (IQR)]: 0.59% (0.41, 0.74), normal never-smokers: 0.35% (0.26, 0.43), P=0.013]; type 2 cDCs - asthma: 0.04% (0.02, 0.06), normal never-smokers: 0.02% (0.01, 0.03), P=0.008 and pDCs - asthma: 0.32% (0.27, 0.46), normal never-smokers: 0.22% (0.17, 0.31), P=0.043, and increased pDC and type 1 cDCs compared with normal smokers. Smoking did not affect DC proportions in asthma. Cigarette smoking reduced pDC proportions in normal subjects [normal never-smokers: 0.22% (0.17, 0.31); normal smokers: 0.09% (0.08, 0.15), P=0.003]. CONCLUSIONS AND CLINICAL RELEVANCE This study shows for the first time that subjects with asthma display a large increase in peripheral blood DC proportions. Cigarette smoking in asthma did not affect the peripheral blood DC profile but did suppress pDC proportions in non-asthmatic subjects. Asthma is associated with a significant increase in circulating DCs, reflecting increased endobronchial levels and the importance of DCs to the development and maintenance of asthma. (Clinical trials.gov identifier: NCT00411320)
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Affiliation(s)
- M Spears
- Department of Respiratory Medicine, Institute of Infection, Immunity and Inflammation, Gartnavel General Hospital, University of Glasgow, Glasgow, UK.
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Wright GR, Howieson S, McSharry C, McMahon AD, Chaudhuri R, Thompson J, Donnelly I, Brooks RG, Lawson A, Jolly L, McAlpine L, King EM, Chapman MD, Wood S, Thomson NC. Effect of improved home ventilation on asthma control and house dust mite allergen levels. Allergy 2009; 64:1671-80. [PMID: 19650848 DOI: 10.1111/j.1398-9995.2009.02098.x] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.1] [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: 11/30/2022]
Abstract
BACKGROUND The warm, humid environment in modern homes favours the dust mite population, but the effect of improved home ventilation on asthma control has not been established. We tested the hypothesis that a domestic mechanical heat recovery ventilation system (MHRV), in addition to allergen avoidance measures, can improve asthma control by attenuating re-colonization rates. METHODS We conducted a randomized double-blind placebo-controlled parallel group trial of the installation of MHRV activated in half the homes of 120 adults with asthma, allergic to Dermatophagoides pteronyssinus. All homes had carpets steam cleaned and new bedding and mattress covers at baseline. The primary outcome was morning peak expiratory flow (PEF) at 12 months. RESULTS At 12 months, the primary end-point; change in mean morning PEF as compared with baseline, did not differ between the MHRV group and the control group (mean difference 13.5 l/min, 95% CI: -2.6 to 29.8, P = 0.10). However, a secondary end-point; evening mean PEF, was significantly improved in the MHRV group (mean difference 24.5 l/min, 95% CI: 8.9-40.1, P = 0.002). Indoor relative humidity was reduced in MHRV homes, but there was no difference between the groups in Der p 1 levels, compared with baseline. CONCLUSIONS The addition of MHRV to house dust mite eradication strategies did not achieve a reduction in mite allergen levels, but did improve evening PEF.
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Affiliation(s)
- G R Wright
- Department of Respiratory Medicine, Division of Immunology, Infection and Inflammation, University of Glasgow, Glasgow, UK
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26
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Spears M, Donnelly I, Jolly L, Brannigan M, Ito K, McSharry C, Lafferty J, Chaudhuri R, Braganza G, Adcock IM, Barnes PJ, Wood S, Thomson NC. Effect of low-dose theophylline plus beclometasone on lung function in smokers with asthma: a pilot study. Eur Respir J 2009; 33:1010-7. [PMID: 19196814 DOI: 10.1183/09031936.00158208] [Citation(s) in RCA: 92] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Smoking is common in asthma and is associated with worse asthma control and a reduced therapeutic response to corticosteroids. The present authors hypothesised that treating smokers with asthma with low-dose theophylline added to inhaled corticosteroids would enhance steroid sensitivity and thereby improve lung function and symptoms. In a double-blind, parallel group exploratory trial, 68 asthmatic smokers were randomised to one of three treatments for 4 weeks: inhaled beclometasone (200 microg day(-1)), theophylline (400 mg day(-1)) or both treatments combined. Outcome measures included change in lung function and Asthma Control Questionnaire (ACQ) scores. At 4 weeks, theophylline added to inhaled beclometasone produced an improvement in peak expiratory flow (39.9 L min(-1), 95% confidence intervals (CI) 10.9-68.8) and ACQ score (-0.47, 95% CI -0.91- -0.04) and a borderline improvement in pre-bronchodilator forced expiratory volume in one second (mean difference 165 mL, 95% CI -13-342) relative to inhaled corticosteroid alone. Theophylline alone improved the ACQ score (-0.55, 95% CI -0.99- -0.11), but not lung function. In the present pilot study, the combination of low-dose theophylline and inhaled beclometasone produced improvements in both lung function and symptoms in a group of smokers with asthma. Larger trials are required to extend and confirm these findings.
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Affiliation(s)
- M Spears
- Faculty of Medicine, University of Glasgow, Glasgow, UK
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27
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Nag N, Halder S, Chaudhuri R, Adhikary S, Mazumder S. Role of bilirubin as antioxidant in neonatal jaundice and effect of ethanolic extract of sweet lime peel on experimentally induced jaundice in rat. Indian J Biochem Biophys 2009; 46:73-78. [PMID: 19374257] [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] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Bilirubin above a threshold level is toxic to human system and is excreted in urinary and through gastrointestinal tract. The role of bilirubin as antioxidant is debatable. This paper aims at elucidating the role of bilirubin as an antioxidant in neonatal jaundice patients. It is observed that bilirubin up to 6 mg/dl in blood acts as an antioxidant and above 12.5 mg/dl is strongly prooxidant. Phototherapy is the accepted therapeutic management of neonatal jaundice and has been shown to enhance the oxidative stress. Approaches have been taken to formulate a herbal medication which will reduce bilirubin level in the neonates without inducing additional damages. The ethanolic extract of sweet lime peel, administered orally at a dose of 72 microg is found to reduce the oxidative stress in erythrocytes of phenylhydrazine-induced jaundiced rats treated with phototherapy.
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Affiliation(s)
- N Nag
- Department of Biochemistry, University of Calcutta, 35, Ballygunge Circular Road, Kolkata 700 019, India
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28
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Hothersall EJ, Chaudhuri R, McSharry C, Donnelly I, Lafferty J, McMahon AD, Weir CJ, Meiklejohn J, Sattar N, McInnes I, Wood S, Thomson NC. Effects of atorvastatin added to inhaled corticosteroids on lung function and sputum cell counts in atopic asthma. Thorax 2008; 63:1070-5. [PMID: 18757458 DOI: 10.1136/thx.2008.100198] [Citation(s) in RCA: 78] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BACKGROUND Statins have anti-inflammatory properties that may be beneficial in the treatment of asthma. A study was undertaken to test the hypothesis that atorvastatin added to inhaled corticosteroids improves lung function and airway inflammation in atopic adults with asthma. METHODS 54 adults with atopic asthma were recruited to a double-blind randomised controlled crossover trial comparing the effect of oral atorvastatin 40 mg daily with that of a matched placebo on asthma control and airway inflammation. Each treatment was administered for 8 weeks separated by a 6-week washout period. The primary outcome was morning peak expiratory flow (PEF). Secondary outcomes included forced expiratory volume in 1 s, asthma control questionnaire score, airway hyper-responsiveness to methacholine, induced sputum cytology and inflammatory biomarkers. RESULTS At 8 weeks the change in mean morning PEF compared with baseline did not differ substantially between the atorvastatin and placebo treatment periods (mean difference -0.5 l/min, 95% CI -10.6 to 9.6, p = 0.921). Values for other clinical outcomes were similar between the atorvastatin and placebo treatment periods. The absolute sputum macrophage count was reduced after atorvastatin compared with placebo (mean difference -45.0 x 10(4) cells, 95% CI -80.1 to -9.7, p = 0.029), as was the sputum fluid leucotriene B4 (mean difference -88.1 pg/ml, 95% CI -156.4 to -19.9, p = 0.014). CONCLUSION The addition of atorvastatin to inhaled corticosteroids results in no short-term improvement in asthma control but reduces sputum macrophage counts in mild to moderate atopic asthma. The change in sputum macrophage count suggests potential areas for investigation of statins in other chronic lung diseases.
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Affiliation(s)
- E J Hothersall
- Respiratory Medicine Section, Division of Immunology, Infection and Inflammation, University of Glasgow, Glasgow, UK
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Chaudhuri R, McSharry C, McCoard A, Livingston E, Hothersall E, Spears M, Lafferty J, Thomson NC. Role of symptoms and lung function in determining asthma control in smokers with asthma. Allergy 2008; 63:132-5. [PMID: 18053022 DOI: 10.1111/j.1398-9995.2007.01538.x] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.1] [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: 11/29/2022]
Abstract
BACKGROUND Cigarette smoking in asthma increases the severity and accelerates the decline in lung function. The relative role of symptoms and lung function in determining asthma control in smokers with asthma is not known. AIM OF THE STUDY The aim of this study was to compare asthma control in smokers vs never-smokers with asthma, using the validated Juniper asthma control questionnaire (ACQ), and assess if any difference was because of a particular symptom or the forced expiratory volume in one second (FEV(1)) value. METHODS This was a cross-sectional study of 134 asthmatics (74 never-smokers and 60 smokers) with >or=15% reversibility in FEV(1) after salbutamol. All subjects completed the ACQ, recording FEV(1) and asthma symptoms (night awakening, morning symptoms, dyspnoea, wheeze, activity limitation and use of reliever inhaler). RESULTS Compared with the never-smokers, smokers with asthma had significantly worse median (IQR) total asthma control score [1.6 (1.1-2.3) vs 2.8 (1.7-3.4); (P < 0.0001)] and in each of the six individual symptom question scores (P < 0.001), but no difference in FEV(1) levels (P = 0.908). CONCLUSION Asthma control is significantly worse in asthmatics who smoke compared with never-smokers, with all symptoms related to asthma control uniformly worse in smokers, independent of FEV(1).
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Affiliation(s)
- R Chaudhuri
- Department of Respiratory Medicine, University of Glasgow, Glasgow, UK
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30
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Taylor MN, Chaudhuri R, Davis J, Novelli V, Jaswon MS. Childhood osteomyelitis presenting as a pathological fracture. Clin Radiol 2007; 63:348-51. [PMID: 18275877 DOI: 10.1016/j.crad.2007.07.022] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2007] [Revised: 07/19/2007] [Accepted: 07/25/2007] [Indexed: 11/25/2022]
Affiliation(s)
- M N Taylor
- Department of Radiology, Whittington Hospital NHS Trust, London, UK
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Abstract
Cigarette smokers with asthma are insensitive to the therapeutic effects of corticosteroids. It is not known whether this insensitivity to corticosteroids in smokers affects tissue sites beyond the airways. A total of 75 asthmatic subjects (39 smokers) and 78 healthy controls (30 smokers) were recruited to an observational study. The cutaneous and peripheral blood lymphocyte responses to corticosteroids were measured. The cutaneous vasoconstrictor response to topical beclometasone was measured by applying different concentrations of beclometasone solutions to the skin in a random double-blind manner. The degree of blanching at each concentration was graded after 18 h. The sensitivity of peripheral blood lymphocytes to corticosteroids was assessed by measuring the suppressive effect of dexamethasone on lymphocyte proliferation stimulated by phytohaemagglutinin (PHA). Total mean+/-sd cutaneous vasoconstrictor response score to beclometasone was reduced in smokers with asthma to 5.39+/-3.58 versus 7.26+/-3.05 in never-smokers with asthma; and in all smokers to 6.47+/-3.33 versus 7.86+/-2.81 in all never-smokers. The sensitivity to corticosteroids of lymphocytes stimulated by PHA was similar between groups. In conclusion, smokers with asthma have an impaired cutaneous vasoconstrictor response to topical corticosteroids compared with never-smokers with asthma. This finding suggests that the insensitivity to corticosteroids in smokers with asthma affects tissue sites other than the airways.
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Affiliation(s)
- E Livingston
- Department of Respiratory Medicine, Division of Immunology, Infection and Inflammation, University of Glasgow and Western Infirmary, Glasgow, G11 6NT, UK
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Tyler PA, Madani G, Chaudhuri R, Wilson LF, Dick EA. The radiological appearances of thalassaemia. Clin Radiol 2006; 61:40-52. [PMID: 16356815 DOI: 10.1016/j.crad.2005.07.006] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2004] [Revised: 06/17/2005] [Accepted: 07/07/2005] [Indexed: 10/25/2022]
Abstract
The skeletal changes of untreated thalassaemia result from ineffective erythropoiesis and expansion of the bone marrow and affect every part of the skeleton. These changes include osteoporosis, growth retardation, platyspondyly and kyphosis. Erythropoiesis occurs at extra-medullary sites, most commonly resulting in a paraspinal mass but occasionally affecting organs containing pluripotential stem cells. Repeated transfusion unaccompanied by iron chelation causes haemosiderosis; iron is deposited at various sites causing functional impairment. Iron-chelation therapy with desferrioxamine (DFX) prevents haemosiderosis but causes a skeletal dysplasia predominantly affecting the rapidly growing long bones, in particular the distal ulna, and causing irregularity and sclerosis of the physeal-metaphyseal junction and splaying of the metaphysis. DFX also exacerbates the observed growth retardation. DFX-induced skeletal dysplasia may herald toxicity, which is associated with visual and auditory impairment. Therefore, careful balancing of the transfusion regimen and iron-chelation therapy is required. Magnetic resonance imaging (MRI) is the most sensitive technique for the detection of DFX-induced dysplasia.
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Chaudhuri R, McMahon AD, McSharry CP, Macleod KJ, Fraser I, Livingston E, Thomson NC. Serum and sputum neurotrophin levels in chronic persistent cough. Clin Exp Allergy 2006; 35:949-53. [PMID: 16008683 DOI: 10.1111/j.1365-2222.2005.02286.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND Neurotrophins (NTs) are a family of growth factors, including nerve growth factor (NGF), brain-derived neurotrophic factor (BDNF) and neurotrophin3 (NT-3) that are involved in inflammation. Serum and induced sputum NT levels are increased in asthma and in cough because of idiopathic pulmonary fibrosis, respectively. Neurogenic inflammation is implicated in the pathogenesis of chronic cough in individuals with normal chest radiography, but the role of NTs in this condition is unknown. OBJECTIVE To assess if NT levels are elevated in the serum and airways in subjects with chronic persistent cough. METHODS Eighty-one subjects with chronic cough persistent for over 1 year; with normal chest radiography and spirometry were included. Thirty healthy subjects were controls. Serum NGF, BDNF and NT-3 were measured by enzyme immunoassay. In a subset, NGF was measured in induced sputum. Sputum cell counts and allergen-specific serum IgE were measured and all patients received specific sequential treatment trials to achieve a final diagnosis for the cough. RESULTS There was no significant difference either in the levels of serum or sputum NTs in chronic cough subjects compared with controls or between the most common causes of cough: post-nasal drip syndrome, gastro-oesophageal reflux disease, asthma and bronchiectasis. The median (inter-quartile range) for sputum NGF (pg/mL) was 516 (296-772) in healthy controls and 580 (312-880) in subjects with chronic cough (P=0.284). There was no correlation between NT levels and sputum cell counts. Sputum NGF levels correlated with duration of cough (r=0.34, P=0.002). CONCLUSION NTs are not elevated in induced sputum or serum of subjects with chronic persistent cough. This implies that NTs do not have a central role in perpetuating airway inflammation in chronic persistent cough.
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Affiliation(s)
- R Chaudhuri
- Departments of Respiratory Medicine, University of Glasgow and Western Infirmary, Glasgow, UK
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Abstract
CONTEXT Although a large number of contributing factors of occupational injury causation are explored meticulously to explain the phenomenon of higher occupational injury occurrence in some subjects, it has remained a matter of controversy. AIMS In this study, an effort is made to explore whether job security has any contribution in explaining higher susceptibility of some workers. SETTINGS AND DESIGN This was a retrospective occupational injury record study conducted in an industry of eastern India. MATERIALS AND METHODS Along with the study of injury records of 5 years, an interview was also conducted involving 726 workers (including permanent and temporary workers both) of the factory. STATISTICAL ANALYSIS USED Comparison was made between permanent and temporary workers by using the Mann-Whitney U-test and the chi-square test. A theoretical model of Poisson's distribution was used to compare between expected and real occurrence. RESULTS Although two worker groups were very similar in relation to age, level of education, habits, and nature of work, accident frequency and severity rates were found to be significantly higher in temporary workers. CONCLUSIONS This study concluded that the higher accident risk of the temporary workers might have been due to the less effective experience as well as due to lack of job security inherent in such workers.
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Affiliation(s)
- Asim Saha
- All India Institute of Hygiene and Public Health, 110, Chittaranjan Avenue, Kolkata, India.
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Saha A, Kulkarni PK, Chaudhuri R, Saiyed H. Occupational injuries: is job security a factor? Indian J Med Sci 2005; 59:375-81. [PMID: 16199922] [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] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
CONTEXT Although a large number of contributing factors of occupational injury causation are explored meticulously to explain the phenomenon of higher occupational injury occurrence in some subjects, it has remained a matter of controversy. AIMS In this study, an effort is made to explore whether job security has any contribution in explaining higher susceptibility of some workers. SETTINGS AND DESIGN This was a retrospective occupational injury record study conducted in an industry of eastern India. MATERIALS AND METHODS Along with the study of injury records of 5 years, an interview was also conducted involving 726 workers (including permanent and temporary workers both) of the factory. STATISTICAL ANALYSIS USED Comparison was made between permanent and temporary workers by using the Mann-Whitney U-test and the chi-square test. A theoretical model of Poisson's distribution was used to compare between expected and real occurrence. RESULTS Although two worker groups were very similar in relation to age, level of education, habits, and nature of work, accident frequency and severity rates were found to be significantly higher in temporary workers. CONCLUSIONS This study concluded that the higher accident risk of the temporary workers might have been due to the less effective experience as well as due to lack of job security inherent in such workers.
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Affiliation(s)
- Asim Saha
- All India Institute of Hygiene and Public Health, 110, Chittaranjan Avenue, Kolkata, India.
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Tomlinson JEM, McMahon AD, Chaudhuri R, Thompson JM, Wood SF, Thomson NC. Efficacy of low and high dose inhaled corticosteroid in smokers versus non-smokers with mild asthma. Thorax 2005; 60:282-7. [PMID: 15790982 PMCID: PMC1747368 DOI: 10.1136/thx.2004.033688] [Citation(s) in RCA: 213] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BACKGROUND Cigarette smokers with asthma are insensitive to short term inhaled corticosteroid therapy, but efficacy when given for a longer duration at different doses is unknown. METHODS Ninety five individuals with mild asthma were recruited to a multicentre, randomised, double blind, parallel group study comparing inhaled beclomethasone in doses of 400 microg or 2000 microg daily for 12 weeks in smokers and non-smokers. The primary end point was the change in morning peak expiratory flow (PEF). Secondary end points included evening PEF, use of reliever inhaler, number of asthma exacerbations, spirometric parameters, and asthma control score. RESULTS After 12 weeks of inhaled beclomethasone there was a considerable difference between the morning PEF measurements of smokers and non-smokers with asthma (-18 (95% CI -35 to -1), adjusted p = 0.035). Among those receiving 400 microg daily there was a difference between the mean (95% CI) morning PEF (l/min) in smokers and non-smokers (-25 (95% CI -45 to -4), adjusted p = 0.019) and in the number of asthma exacerbations (6 v 1 in smokers and non-smokers, respectively, p = 0.007). These differences were reduced between smokers and non-smokers receiving 2000 microg inhaled beclomethasone daily. CONCLUSIONS Compared with non-smokers, smokers with mild persistent asthma are insensitive to the therapeutic effect of low dose inhaled corticosteroid treatment administered for a 12 week period. The disparity of the response between smokers and non-smokers appears to be reduced with high dose inhaled corticosteroid. These findings have important implications for the management of individuals with mild asthma who smoke.
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Affiliation(s)
- J E M Tomlinson
- Department of General Practice, University of Glasgow, Glasgow, UK
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Abstract
In most developed countries approximately 25% of adults with asthma are current cigarette smokers. Asthma and active cigarette smoking interact to cause more severe symptoms, accelerated decline in lung function, and impaired short-term therapeutic response to corticosteroids. Cigarette smoking may modify inflammation that is associated with asthma, although there is limited published data on airway pathology in smokers with asthma. To date, the evidence points towards a combination of both heightened and suppressed inflammatory responses in smokers compared with nonsmokers with asthma. The mechanisms of corticosteroid resistance in asthmatic smokers are unexplained, but could be as a result of alterations in airway inflammatory cell phenotypes (e.g. increased neutrophils or reduced eosinophils), changes in the glucocorticoid receptor-alpha to -beta ratio (e.g. overexpression of glucocorticoid receptor beta), and increased activation of pro-inflammatory transcription factors (e.g. nuclear factor-kappaB) or reduced histone deacetylase activity. In conclusion, every effort should be made to encourage asthmatics who smoke to stop, although the effects of smoking cessation upon reversing the adverse effects of tobacco smoke on asthma control, therapeutic response to corticosteroids and airway pathology have yet to be fully elucidated. Alternative or additional therapies to inhaled corticosteroids are needed for asthmatic patients who are unable to quit smoking.
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Affiliation(s)
- N C Thomson
- Dept of Respiratory Medicine, Division of Immunology, Infection and Inflammation, Western Infirmary & University of Glasgow, Glasgow, G11 6NT, UK.
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McKay A, Komai-Koma M, MacLeod KJ, Campbell CC, Kitson SM, Chaudhuri R, Thomson L, McSharry C, Liew FY, Thomson NC. Interleukin-18 levels in induced sputum are reduced in asthmatic and normal smokers. Clin Exp Allergy 2004; 34:904-10. [PMID: 15196278 DOI: 10.1111/j.1365-2222.2004.01973.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND IL-18 is a cytokine which is known to have an important role in the development of a Th1 lymphocyte response. As such, it may have a regulatory role in asthma by modifying Th2 lymphocyte responses. Cigarette smoking may amplify the airway inflammation associated with asthma. OBJECTIVE This study investigated if IL-18 could be detected in induced sputum from asthmatics and normal subjects and if smoking altered IL-18 levels. METHODS Induced sputum was obtained from asthmatic (31 smokers, 35 non-smokers) and normal (20 smokers, 20 non-smokers) subjects. All smokers had a smoking history of > or =15 pack years. IL-18 levels in sputum supernatant were measured by ELISA. IL-18 mRNA expression and cellular localization were assessed by quantitative PCR and immunocytochemistry, respectively. RESULTS Smoking was associated with a significant reduction in IL-18 levels (median (interquartile range) - smokers 20 (0-102) pg/mL vs. non-smokers 358 (50-876) pg/mL, P<0.001). This was more pronounced in asthmatics (smokers, 47 (40-64) pg/mL vs. non-smokers, 530 (30-1484) pg/mL; P<0.001) than in normal subjects (smokers, 25 (0-78) pg/mL vs. non-smokers, 247 (50-656) pg/mL; P<0.01). Within each of the smoking and non-smoking groups there was no significant difference in IL-18 levels between asthmatic and normal subjects. There was no correlation between sputum IL-18 levels and any specific cell type in the sputum samples nor serum IgE levels. IL-18 mRNA expression was reduced in asthmatic smokers compared with non-smokers. IL-18 production was localized to sputum macrophages by immunocytochemistry. CONCLUSIONS IL-18 is detectable in induced sputum samples from both asthmatic and normal subjects. Cigarette smoking significantly reduces sputum IL-18 levels. This effect is more pronounced in asthmatics than in normal subjects.
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Affiliation(s)
- A McKay
- Division of Immunology, Infection and Inflammation, University of Glasgow, Glasgow, UK
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Trenkwalder C, Canelo M, Forbes A, Leroux M, Chaudhuri R. Cabergoline versus pergolide in levodopa-treated Parkinson's disease patients with nocturnal disabilities: a randomised, double-blind crossover trial to evaluate efficacy, tolerability, and quality of life. Akt Neurol 2004. [DOI: 10.1055/s-2004-833290] [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: 10/28/2022]
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Narvani AA, Tsiridis E, Kendall S, Chaudhuri R, Thomas P. A preliminary report on prevalence of acetabular labrum tears in sports patients with groin pain. Knee Surg Sports Traumatol Arthrosc 2003; 11:403-8. [PMID: 12897984 DOI: 10.1007/s00167-003-0390-7] [Citation(s) in RCA: 155] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/08/2002] [Accepted: 03/21/2003] [Indexed: 11/30/2022]
Abstract
To the best of our knowledge, this prospective study is the first to investigate the prevalence of acetabular labrum tears in athletes presenting with groin pain. Eighteen athletes who presented to our sports clinic with groin pain, underwent clinical assessment and magnetic resonance arthrography (MRa) to detect presence or absence of acetabular labrum tears. Ethical committee approval and informed consent was obtained from each patient. In four out of these eighteen athletes (22%) the MRa demonstrated the presence of acetabular labrum tear. Three of them underwent arthroscopic debridement of their acetabular labrum tears and returned to their sporting activities within 8 months. Clicking sensation of the hip was a sensitive (100%) and specific (85%) clinical symptom to predict labral tears. The internal rotation-flexion-axial compression manoeuvre was sensitive (75%) but not specific (43%). The Thomas test was neither sensitive nor specific. The conclusion of the study is that acetabular labrum tears can be a common cause of groin pain in athletes. Sports clinicians managing athletes with groin pain have to be well aware of the condition.
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Affiliation(s)
- A A Narvani
- School of Exercise & Health, University College of London, University of London, UK.
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Chaudhuri R. Autonomic failure. A textbook of clinical disorders of the autonomic nervous system, 4th edition: Edited by Christopher J Mathias and Sir Roger Bannister (Pp 562, pound70.00). Published by Oxford University Press, Oxford, 2002. ISBN 0 19 262850 X. Journal of Neurology, Neurosurgery & Psychiatry 2003. [DOI: 10.1136/jnnp.74.4.551] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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López Arbeloa F, Chaudhuri R, Arbeloa López T, López Arbeloa I. Aggregation of Rhodamine 3B Adsorbed in Wyoming Montmorillonite Aqueous Suspensions. J Colloid Interface Sci 2002; 246:281-7. [PMID: 16290412 DOI: 10.1006/jcis.2001.8074] [Citation(s) in RCA: 30] [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] [Received: 06/12/2001] [Accepted: 10/29/2001] [Indexed: 11/22/2022]
Abstract
The adsorption of Rhodamine 3B (R3B) molecules in Wyoming Montmorillonite (Mont) particles suspended in water was studied by electronic absorption spectroscopy. Several adsorbed R3B species in the Mont tactoids were characterized from the observed changes in the absorption spectra by increasing the relative dye/clay concentration and the stirring time of the samples. R3B molecules can be adsorbed as monomeric units both in the water/clay interface and in the interlayer space, and head-to-tail R3B dimers and trimers were present in the external surface of Mont. The formation of internally adsorbed R3B monomers by the migration of the externally adsorbed species to the interlayer space leads to the deaggregation of the dye molecules in the external surface.
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Affiliation(s)
- F López Arbeloa
- Departamento de Química Física, Universidad del País Vasco EHU, Apartado 644, 48080 Bilbao, Spain.
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Abstract
A study was undertaken to identify the variation of entrance skin doses (ESDs) in mobile neonatal chest radiography with regard to the European Commission (EC) reference dose and to examine potential relationships with image quality and radiographic techniques. Five sites from the former North West Thames region participated. All mobile neonatal radiographic techniques were surveyed. Dose-area product per examination was directly measured and the ESD calculated. Image quality criteria were developed from those published by the EC. Image quality was graded by two independent observers. Over the five sites, 144 examinations were recorded. Calculated ESDs ranged up to 160 microGy, with an appreciable variation not only between sites but also within sites. A clear relationship between actual rather than nominal speed and dose over all sites was demonstrated (r = -0.95, p = 0.013). No correlation between image quality and dose was noted (r = -0.044, p = 0.665). Neonatal imaging systems at participating sites, within the North Thames region, comply with EC guidelines on patient dose and image quality for mobile chest X-rays. Significant variation in ESDs was encountered between sites with no discernible relationship with image quality or the employed radiographic techniques as described by the EC. The strong inverse relationship between ESDs and actual rather than nominal speed suggests a neglected aspect of radiation protection.
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Affiliation(s)
- A Lowe
- Division of Radiography, Faculty of Health and Human Science, University of Hertfordshire, Hatfield, UK
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Bush K, Chaudhuri R, Hillier S, Penny J. The pathomorphologic changes that accompany the resolution of cervical radiculopathy. A prospective study with repeat magnetic resonance imaging. Spine (Phila Pa 1976) 1997; 22:183-6; discussion 187. [PMID: 9122798 DOI: 10.1097/00007632-199701150-00009] [Citation(s) in RCA: 63] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
STUDY DESIGN A prospective study with independent clinical and radiologic review. OBJECTIVE To assess whether regression of cervical intervertebral disc herniations accompanied and correlated with clinical improvement in patients recovering from cervical radiculopathy without undergoing surgical intervention. SUMMARY OF BACKGROUND DATA The study subjects were 13 consecutive patients, nine men (69%) and four women (31%), presenting with cervical radiculopathy. All patients but one had objective neurologic signs. All patients had large posterolateral cervical intervertebral disc herniations demonstrated by magnetic resonance imaging. METHODS Pain was controlled by serial periradicular and epidural corticosteroid injections. Patients were finally examined and discharged from care because of sustained pain control at an average of 6 months (range, 2-12 months). They were interviewed subsequently over the telephone by an independent clinician and rescanned at an average of 12 months (range, 4-31 months). The scans were reviewed by an independent radiologist masked to the sequence of the scans. RESULTS Regression of cervical disc herniations was demonstrated in 12 of the 13 patients. All patients had made a satisfactory clinical recovery, but the one with the herniation that had not regressed suffered from persistent minor symptoms. CONCLUSIONS Most cervical disc herniations regress with time and without the need for surgical resection. Thus, surgical intervention can be avoided with adequate pain control, allowing the herniation time to regress.
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Affiliation(s)
- K Bush
- London Clinic Scanning Services, United Kingdom
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Datta B, Chaudhuri R, Mukherjee D. Method of intermediate hamiltonians via eigenvalue-independent partitioning: application to theoretical spectroscopy. ACTA ACUST UNITED AC 1996. [DOI: 10.1016/0166-1280(95)04298-9] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.0] [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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Guan X, Hardenbrook J, Fernstrom MJ, Chaudhuri R, Malkinson AM, Ruch RJ. Down-regulation by butylated hydroxytoluene of the number and function of gap junctions in epithelial cell lines derived from mouse lung and rat liver. Carcinogenesis 1995; 16:2575-82. [PMID: 7586169 DOI: 10.1093/carcin/16.10.2575] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.1] [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: 01/26/2023] Open
Abstract
The mouse pneumotoxicant and lung and liver tumor promoter butylated hydroxytoluene (BHT) was examined for its effects on gap junctional intercellular communication (GJIC) in mouse lung epithelial (C10) and rat liver epithelial (WB-F344) cell lines. GJIC, as measured by fluorescent dye microinjection, was inhibited in both types of cells by BHT in dose- and time-dependent fashions. Inhibition was detected in WB-F344 cells at BHT concentrations > or = 62.5 microM and in C10 cells at concentrations > or = 150 microM after 4 h treatment. Inhibition occurred within 15-30 min and was reversed by removing BHT from the culture medium. The highly toxic BHT metabolite 6-t-butyl-2-(hydroxy-t-butyl)-4-methylphenol (BHTOH) and the non-toxic BHT metabolite, 2,6-di-t-butyl-4-hydroxymethylphenol (BHTBzOH) were also tested. In both cell lines BHTOH was a more potent inhibitor of GJIC than BHT, whereas BHTBzOH was ineffective. The mechanisms of inhibition of GJIC by BHT were also examined. The initial rapid inhibition detected within 15-30 min may have been due to gap junction channel closure or blockage, since no changes in gap junction number, connexin (Cx) 43 levels or Cx43 phosphorylation were observed. By 2-4 h, however, gap junctions were internalized into the cytoplasm, the number of immunodetectable plasma membrane gap junctions was reduced and phosphorylated Cx43-P2 was decreased. Treatment of the cells for 24 h with 12-O-tetradecanoylphorbol-13-acetate (TPA) prevented inhibition of GJIC by TPA, but not by BHT. Western blot analyses of TPA-treated WB-F344 or C10 cells revealed the presence of a hyperphosphorylated form of Cx43 (Cx43-P3) and no reduction in Cx43-P2, in contrast to BHT-treated cells. These data suggest that BHT and TPA inhibit lung and liver epithelial cell GJIC through distinct mechanisms.
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Affiliation(s)
- X Guan
- Department of Pathology, Medical College of Ohio, Toledo 43699, USA
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Abstract
Cerebellar hypoplasia may present with a wide variety of neurological and systemic features, ranging from aplasia causing neonatal death to mild hypoplasia in an asymptomatic adult. MRI clearly documents the size of the cerebellum and any associated abnormalities. We describe 7 cases of cerebellar hypoplasia of varying aetiology--3 inherited, 2 associated with spinal dysraphism, 1 with Joubert's syndrome and 1 with pontine agenesis, probably as a result of basilar artery infarction in utero. T1- and T2-weighted images were obtained in each case and gadolinium-DTPA was administered in one. Associated features such as a Chiari malformation (2 cases), brain stem hypoplasia (2 cases), Dandy-Walker cyst and pachygyria (3 cases) and spinal dysraphism (2 cases) were clearly identified. Accurate documentation of these appearances assists in genetic counselling.
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Affiliation(s)
- N deSouza
- Department of Magnetic Resonance, Guys' Hospital, London, UK
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Fuller R, Crist K, Mahajan T, Chaudhuri R, Chaudhuri B, Chaudhuri PK. A model for evaluation of chemoprevention of progression of pre-invasive breast neoplasia. Eur J Cancer Prev 1993. [DOI: 10.1097/00008469-199311000-00023] [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: 11/25/2022]
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