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Musters AH, Broderick C, Prieto‐Merino D, Chiricozzi A, Damiani G, Peris K, Dhar S, De A, Freeman E, Arents BWM, Burton T, Bosma AL, Chi C, Fletcher G, Drucker AM, Kabashima K, de Monchy EF, Panda M, Wall D, Vestergaard C, Mahé E, Bonzano L, Kattach L, Napolitano M, Ordoñez‐Rubiano MF, Haufe E, Patruno C, Irvine AD, Spuls PI, Flohr C. The effects of systemic immunomodulatory treatments on COVID-19 outcomes in patients with atopic dermatitis: Results from the global SECURE-AD registry. J Eur Acad Dermatol Venereol 2022; 37:365-381. [PMID: 36169355 PMCID: PMC9537876 DOI: 10.1111/jdv.18613] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2022] [Accepted: 08/17/2022] [Indexed: 01/18/2023]
Abstract
BACKGROUND Limited data are available on the effects of systemic immunomodulatory treatments on COVID-19 outcomes in patients with atopic dermatitis (AD). OBJECTIVE To investigate COVID-19 outcomes in patients with AD treated with or without systemic immunomodulatory treatments, using a global registry platform. METHODS Clinicians were encouraged to report cases of COVID-19 in their patients with AD in the Surveillance Epidemiology of Coronavirus Under Research Exclusion for Atopic Dermatitis (SECURE-AD) registry. Data entered from 1 April 2020 to 31 October 2021 were analysed using multivariable logistic regression. The primary outcome was hospitalization from COVID-19, according to AD treatment groups. RESULTS 442 AD patients (mean age 35.9 years, 51.8% male) from 27 countries with strongly suspected or confirmed COVID-19 were included in analyses. 428 (96.8%) patients were treated with a single systemic therapy (n = 297 [67.2%]) or topical therapy only (n = 131 [29.6%]). Most patients treated with systemic therapies received dupilumab (n = 216). Fourteen patients (3.2%) received a combination of systemic therapies. Twenty-six patients (5.9%) were hospitalized. No deaths were reported. Patients treated with topical treatments had significantly higher odds of hospitalization, compared with those treated with dupilumab monotherapy (odds ratio (OR) 4.65 [95%CI 1.71-14.78]), including after adjustment for confounding variables (adjusted OR (aOR) 4.99 [95%CI 1.4-20.84]). Combination systemic therapy which did not include systemic corticosteroids was associated with increased odds of hospitalization, compared with single agent non-steroidal immunosuppressive systemic treatment (OR 8.09 [95%CI 0.4-59.96], aOR 37.57 [95%CI 1.05-871.11]). Hospitalization was most likely in patients treated with combination systemic therapy which included systemic corticosteroids (OR 40.43 [95%CI 8.16-207.49], aOR 45.75 [95%CI 4.54-616.22]). CONCLUSIONS Overall, the risk of COVID-19 complications appears low in patients with AD, even when treated with systemic immunomodulatory agents. Dupilumab monotherapy was associated with lower hospitalization than other therapies. Combination systemic treatment, particularly combinations including systemic corticosteroids, was associated with the highest risk of severe COVID-19.
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Affiliation(s)
- A. H. Musters
- Department of Dermatology, Amsterdam UMC, location Academic Medical CenterUniversity of Amsterdam, Amsterdam Public Health, Infection and ImmunityThe Netherlands
| | - C. Broderick
- Unit for Population‐Based Dermatology Research, Guy’s and St Thomas’ NHS Foundation Trust and King’s College LondonLondonUK
| | - D. Prieto‐Merino
- Faculty of Epidemiology & Population Health, London School of Hygiene & Tropical MedicineLondonUK
| | - A. Chiricozzi
- Dermatologia, Fondazione Policlinico Universitario A. Gemelli IRCCSRomeItaly,Dermatologia, Università Cattolica del Sacro CuoreRomeItaly
| | - G. Damiani
- Clinical Dermatology, IRCCS Istituto Ortopedico Galeazzi, 20161MilanItaly,Department of Biomedical, Surgical and Dental SciencesUniversity of MilanMilanItaly,PhD Degree Program in Pharmacological Sciences, Department of Pharmaceutical and Pharmacological SciencesUniversity of PaduaPaduaItaly
| | - K. Peris
- Dermatologia, Dipartimento di Medicina e Chirurgia Traslazionale, Università Cattolica del Sacro CuoreRomeItaly,UOC di Dermatologia, Dipartimento di Scienze Mediche e Chirurgiche, Fondazione Policlinico Universitario A. Gemelli ‐ IRCCSRomeItaly
| | - S. Dhar
- Department of Pediatric DermatologyInstitute of Child HealthKolkataIndia
| | - A. De
- Department of DermatologyCalcutta National Medical CollegeKolkataIndia
| | - E. Freeman
- Department of Dermatology, Massachusetts General HospitalHarvard Medical SchoolBostonMAUSA,Medical Practice Evaluation CenterMongan Institute, Massachusetts General Hospital, Harvard Medical SchoolBostonMAUSA
| | - B. W. M. Arents
- Dutch Association for People with Atopic Dermatitis (VMCE), NijkerkThe Netherlands
| | - T. Burton
- Patient Representative (independent), NottinghamUnited Kingdom
| | - A. L. Bosma
- Department of Dermatology, Amsterdam UMC, location Academic Medical CenterUniversity of Amsterdam, Amsterdam Public Health, Infection and ImmunityThe Netherlands
| | - C.‐C. Chi
- Department of Dermatology, Chang Gung Memorial Hospital, LinkouTaoyuanTaiwan,College of MedicineChang Gung UniversityTaoyuanTaiwan
| | - G. Fletcher
- National and International Skin Registry Solutions (NISR), Charles Institute of DermatologyUniversity College DublinDublinIreland
| | - A. M. Drucker
- Department of MedicineUniversity of Toronto, Toronto, Canada; Women's College Research Institute, Women's College HospitalTorontoCanada
| | - K. Kabashima
- Department of DermatologyKyoto University Graduate School of MedicineKyotoJapan,Singapore Immunology Network (SIgN) and Skin Research Institute of Singapore (SRIS), Agency for Science, Technology and Research (A*STAR), BiopolisSingapore
| | - E. F. de Monchy
- Department of Dermatology, Amsterdam UMC, location Academic Medical CenterUniversity of Amsterdam, Amsterdam Public Health, Infection and ImmunityThe Netherlands
| | - M. Panda
- Department of DVLInstitute of Medical Sciences and SUM HospitalBhubaneswarOdishaIndia
| | - D. Wall
- National and International Skin Registry Solutions (NISR), Charles Institute of DermatologyUniversity College DublinDublinIreland,Hair Restoration BlackrockDublinIreland
| | - C. Vestergaard
- Department of DermatologyAarhus University HospitalAarhusDenmark
| | - E. Mahé
- Service de Dermatologie et Médecine VasculaireCentre Hospitalier Victor Dupouy, 69 rue du Lieutenant‐Colonel Prud'honArgenteuilCedexFrance
| | - L. Bonzano
- Dermatology Unit, Azienda USL‐IRCCS di Reggio EmiliaReggio EmiliaItaly
| | - L. Kattach
- Guy's & St. Thomas' Hospitals NHS Foundation Trust
| | - M. Napolitano
- Department of Medicine and Health Sciences Vincenzo TiberioUniversity of MoliseCampobassoItaly
| | | | - E. Haufe
- Center for Evidence‐based Health Care (ZEGV), Medical Faculty Carl Gustav Carus, TU DresdenDresdenGermany
| | - C. Patruno
- Dermatology and Venereology, Department of Health SciencesUniversity Magna Graecia of CatanzaroItaly
| | | | - P. I. Spuls
- Department of Dermatology, Amsterdam UMC, location Academic Medical CenterUniversity of Amsterdam, Amsterdam Public Health, Infection and ImmunityThe Netherlands
| | - C. Flohr
- Unit for Population‐Based Dermatology Research, Guy’s and St Thomas’ NHS Foundation Trust and King’s College LondonLondonUK
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Kasturiratne A, Khawaja KI, Ahmad S, Siddiqui S, Shahzad K, Athauda LK, Jayawardena R, Mahmood S, Muilwijk M, Batool T, Burney S, Glover M, Palaniswamy S, Bamunuarachchi V, Panda M, Madawanarachchi S, Rai B, Sattar I, Silva W, Waghdhare S, Jarvelin MR, Rannan-Eliya RP, Gage HM, van Valkengoed IGM, Valabhji J, Frost GS, Loh M, Wickremasinghe AR, Kooner JS, Katulanda P, Jha S, Chambers JC. The iHealth-T2D study, prevention of type 2 diabetes amongst South Asians with central obesity and prediabetes: study protocol for a randomised controlled trial. Trials 2021; 22:928. [PMID: 34922608 PMCID: PMC8684177 DOI: 10.1186/s13063-021-05803-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Accepted: 11/06/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND People from South Asia are at increased risk of type 2 diabetes (T2D). There is an urgent need to develop approaches for the prevention of T2D in South Asians that are cost-effective, generalisable and scalable across settings. HYPOTHESIS Compared to usual care, the risk of T2D can be reduced amongst South Asians with central obesity or raised HbA1c, through a 12-month lifestyle modification programme delivered by community health workers. DESIGN Cluster randomised clinical trial (1:1 allocation to intervention or usual care), carried out in India, Pakistan, Sri Lanka and the UK, with 30 sites per country (120 sites total). Target recruitment 3600 (30 participants per site) with annual follow-up for 3 years. ENTRY CRITERIA South Asian, men or women, age 40-70 years with (i) central obesity (waist circumference ≥ 100 cm in India and Pakistan; ≥90 cm in Sri Lanka) and/or (ii) prediabetes (HbA1c 6.0-6.4% inclusive). EXCLUSION CRITERIA known type 1 or 2 diabetes, normal or underweight (body mass index < 22 kg/m2); pregnant or planning pregnancy; unstable residence or planning to leave the area; and serious illness. ENDPOINTS The primary endpoint is new-onset T2D at 3 years, defined as (i) HbA1c ≥ 6.5% or (ii) physician diagnosis and on treatment for T2D. Secondary endpoints at 1 and 3 years are the following: (i) physical measures: waist circumference, weight and blood pressure; (ii) lifestyle measures: smoking status, alcohol intake, physical activity and dietary intake; (iii) biochemical measures: fasting glucose, insulin and lipids (total and HDL cholesterol, triglycerides); and (iv) treatment compliance. INTERVENTION Lifestyle intervention (60 sites) or usual care (60 sites). Lifestyle intervention was delivered by a trained community health worker over 12 months (5 one-one sessions, 4 group sessions, 13 telephone sessions) with the goal of the participants achieving a 7% reduction in body mass index and a 10-cm reduction in waist circumference through (i) improved diet and (ii) increased physical activity. Usual care comprised a single 30-min session of lifestyle modification advice from the community health worker. RESULTS We screened 33,212 people for inclusion into the study. We identified 10,930 people who met study entry criteria, amongst whom 3682 agreed to take part in the intervention. Study participants are 49.2% female and aged 52.8 (SD 8.2) years. Clinical characteristics are well balanced between intervention and usual care sites. More than 90% of follow-up visits are scheduled to be complete in December 2020. Based on the follow-up to end 2019, the observed incidence of T2D in the study population is in line with expectations (6.1% per annum). CONCLUSION The iHealth-T2D study will advance understanding of strategies for the prevention of diabetes amongst South Asians, use approaches for screening and intervention that are adapted for low-resource settings. Our study will thus inform the implementation of strategies for improving the health and well-being of this major global ethnic group. IRB APPROVAL 16/WM/0171 TRIAL REGISTRATION: EudraCT 2016-001350-18 . Registered on 14 April 2016. ClinicalTrials.gov NCT02949739 . Registered on 31 October 2016, First posted on 31/10/2016.
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Affiliation(s)
- Anuradhani Kasturiratne
- Department of Public Health, Faculty of Medicine, University of Kelaniya, PO Box 06, Thalagolla Road, Ragama, 11010, Sri Lanka
| | - Khadija I Khawaja
- Department of Endocrinology & Metabolism, Services Institute of Medical Sciences, Services Hospital, Ghaus ul Azam, Jail Road, Lahore, 54700, Pakistan
| | - Sajjad Ahmad
- Punjab Institute of Cardiology, Jail Road, Lahore, Pakistan
| | - Samreen Siddiqui
- Institute of Endocrinology, Diabetes & Metabolism, Max Super Speciality Hospital, 2, Press Enclave Road, Saket, New Delhi, 110017, India
| | | | - Lathika K Athauda
- Department of Public Health, Faculty of Medicine, University of Kelaniya, PO Box 06, Thalagolla Road, Ragama, 11010, Sri Lanka
| | - Ranil Jayawardena
- Department of Physiology, Faculty of Medicine, University of Colombo, Colombo, Sri Lanka
| | - Sara Mahmood
- Department of Endocrinology & Metabolism, Services Institute of Medical Sciences, Services Hospital, Ghaus ul Azam, Jail Road, Lahore, 54700, Pakistan
| | - Mirthe Muilwijk
- Department of Public and Occupational Health, Amsterdam Public Health research institute, Amsterdam UMC, University of Amsterdam, Meibergdreef 9, 1105, AZ, Amsterdam, The Netherlands
| | - Tayyaba Batool
- Department of Endocrinology & Metabolism, Diabetes Management Centre, Services Hospital, Ghaus-ul-Azam, Jail Road, Lahore, 540000, Pakistan
| | - Saira Burney
- Department of Endocrinology & Metabolism, Diabetes Management Centre, Services Hospital, Ghaus-ul-Azam, Jail Road, Lahore, 540000, Pakistan
| | - Matthew Glover
- School of Biosciences and Medicine, Faculty of Health and Medical Sciences, University of Surrey, Daphne Jackson Road, Guildford, GU2 7WG, Surrey, England
| | - Saranya Palaniswamy
- School of Public Health, Epidemiology and Biostatistics, Imperial College London, St Mary's Campus, Norfolk Place, London, W2 1PG, UK
- Center for Life Course Health Research, Faculty of Medicine, University of Oulu, Oulu, Finland
| | | | - Manju Panda
- Institute of Endocrinology, Diabetes & Metabolism, Max Super Speciality Hospital, 2, Press Enclave Road, Saket, New Delhi, 110017, India
| | - Suren Madawanarachchi
- Diabetes Research Unit, Faculty of Medicine, University of Colombo, Colombo, Sri Lanka
| | - Baldeesh Rai
- School of Public Health, Epidemiology and Biostatistics, Imperial College London, St Mary's Campus, Norfolk Place, London, W2 1PG, UK
| | - Iqra Sattar
- Punjab Institute of Cardiology, Jail Road, Lahore, Pakistan
| | - Wnurinham Silva
- School of Public Health, Epidemiology and Biostatistics, Imperial College London, St Mary's Campus, Norfolk Place, London, W2 1PG, UK
| | - Swati Waghdhare
- Institute of Endocrinology, Diabetes & Metabolism, Max Super Speciality Hospital, 2, Press Enclave Road, Saket, New Delhi, 110017, India
| | - Marjo-Riitta Jarvelin
- School of Public Health, Epidemiology and Biostatistics, Imperial College London, St Mary's Campus, Norfolk Place, London, W2 1PG, UK
- Center for Life Course Health Research, Faculty of Medicine, University of Oulu, Oulu, Finland
- Department of Life Sciences, College of Health and Life Sciences, Brunel University London, Kingston Lane, Uxbridge, Middlesex, UB8 3PH, UK
- Unit of Primary Care, Oulu University Hospital, Oulu, Finland
| | | | - Heather M Gage
- Surrey Health Economics Centre, Department of Clinical and Experimental Medicine, University of Surrey, Leggett Building, Daphne Jackson Road, Guildford, GU2 7WG, Surrey, England
| | - Irene G M van Valkengoed
- Department of Public and Occupational Health, Amsterdam Public Health research institute, Amsterdam UMC, University of Amsterdam, Meibergdreef 9, 1105, AZ, Amsterdam, The Netherlands
| | - Jonathan Valabhji
- Department of Diabetes and Endocrinology, 1st Floor Mint Wing, St Mary's Hospital, Imperial College Healthcare NHS Trust, London, W2 1NY, UK
| | - Gary S Frost
- 6th Floor Commonwealth Building, Faculty of Medicine, Imperial College London, Hammersmith Campus, Ducane Road, London, W12 ONN, UK
| | - Marie Loh
- School of Public Health, Epidemiology and Biostatistics, Imperial College London, St Mary's Campus, Norfolk Place, London, W2 1PG, UK
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, 308232, Singapore
| | - Ananda R Wickremasinghe
- Department of Public Health, Faculty of Medicine, University of Kelaniya, PO Box 06, Thalagolla Road, Ragama, 11010, Sri Lanka
| | - Jaspal S Kooner
- National Heart and Lung Institute, Imperial College London, Hammersmith Hopsital Campus, Ducane Road, London, W12 ONN, UK
- , Uxbridge Road, Southall, Middlesex, UB1 3HW, UK
| | - Prasad Katulanda
- Department of Clinical Medicine, Faculty of Medicine, University of Colombo, Colombo, Sri Lanka
| | - Sujeet Jha
- Institute of Endocrinology, Diabetes & Metabolism, Max Super Speciality Hospital, 2, Press Enclave Road, Saket, New Delhi, 110017, India
| | - John C Chambers
- School of Public Health, Epidemiology and Biostatistics, Imperial College London, St Mary's Campus, Norfolk Place, London, W2 1PG, UK.
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, 308232, Singapore.
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3
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Muilwijk M, Loh M, Siddiqui S, Mahmood S, Palaniswamy S, Shahzad K, Athauda LK, Jayawardena R, Batool T, Burney S, Glover M, Bamunuarachchi V, Panda M, Madawanarachchi M, Rai B, Sattar I, Silva W, Waghdhare S, Jarvelin MR, Rannan-Eliya RP, Wijemunige N, Gage HM, Valabhji J, Frost GS, Wickremasinghe R, Kasturiratne A, Khawaja KI, Ahmad S, van Valkengoed IG, Katulanda P, Jha S, Kooner JS, Chambers JC. Effects of a lifestyle intervention programme after 1 year of follow-up among South Asians at high risk of type 2 diabetes: a cluster randomised controlled trial. BMJ Glob Health 2021; 6:e006479. [PMID: 34725039 PMCID: PMC8562508 DOI: 10.1136/bmjgh-2021-006479] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Accepted: 09/30/2021] [Indexed: 12/17/2022] Open
Abstract
INTRODUCTION South Asians are at high risk of type 2 diabetes (T2D). We assessed whether intensive family-based lifestyle intervention leads to significant weight loss, improved glycaemia and blood pressure in adults at elevated risk for T2D. METHODS This cluster randomised controlled trial (iHealth-T2D) was conducted at 120 locations across India, Pakistan, Sri Lanka and the UK. We included 3684 South Asian men and women, aged 40-70 years, without T2D but with raised haemoglobin A1c (HbA1c) and/or waist circumference. Participants were randomly allocated either to the family-based lifestyle intervention or control group by location clusters. Participants in the intervention received 9 visits and 13 telephone contacts by community health workers over 1-year period, and the control group received usual care. Reductions in weight (aim >7% reduction), waist circumference (aim ≥5 cm reduction), blood pressure and HbA1C at 12 months of follow-up were assessed. Our linear mixed-effects regression analysis was based on intention-to-treat principle and adjusted for age, sex and baseline values. RESULTS There were 1846 participants in the control and 1838 in the intervention group. Between baseline and 12 months, mean weight of participants in the intervention group reduced by 1.8 kg compared with 0.4 kg in the control group (adjusted mean difference -1.10 kg (95% CI -1.70 to -1.06), p<0.001). The adjusted mean difference for waist circumference was -1.9 cm (95% CI -2.5; to 1.3), p<0.001). No overall difference was observed for blood pressure or HbA1c. People who attended multiple intervention sessions had a dose-dependent effect on waist circumference, blood pressure and HbA1c, but not on weight. CONCLUSION An intensive family-based lifestyle intervention adopting low-resource strategies led to effective reduction in weight and waist circumference at 12 months, which has potential long-term benefits for preventing T2D. A higher number of attended sessions increased the effect on waist circumference, blood pressure and HbA1c. TRIAL REGISTRATION NUMBER EudraCT: 2016-001350-18; ClinicalTrials.gov: NCT02949739.
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Affiliation(s)
- Mirthe Muilwijk
- Department of Public and Occupational Health, Amsterdam Public Health research institute, Amsterdam UMC Locatie AMC, Amsterdam, The Netherlands
| | - Marie Loh
- Lee Kon Chian School of Medicine, Nanyang Technological University, Singapore
- Department of Epidemiology and Biostatistics, Imperial College London, London, UK
| | - Samreen Siddiqui
- Institute of Endocrinology Diabetes and Metabolism, Max Healthcare, New Delhi, Delhi, India
| | - Sara Mahmood
- Department of Endocrinology & Metabolism, Services Institute of Medical Sciences, Lahore, Punjab, Pakistan
| | - Saranya Palaniswamy
- Department of Epidemiology and Biostatistics, Imperial College London, London, UK
- Center for Life Course Health Research, Faculty of Medicine, University of Oulu, Oulu, Finland
| | | | - Lathika K Athauda
- Department of Public Health, Faculty of Medicine, University of Kelaniya, Kelaniya, Sri Lanka
| | - Ranil Jayawardena
- Department of Physiology, Faculty of Medicine, University of Colombo, Colombo, Western, Sri Lanka
| | - Tayyaba Batool
- Department of Endocrinology and Metabolism, Services Institute of Medical Sciences, Lahore, Punjab, Pakistan
| | - Saira Burney
- Department of Endocrinology & Metabolism, Services Institute of Medical Sciences, Lahore, Punjab, Pakistan
| | - Matthew Glover
- School of Biosciences and Medicine, Faculty of Health and Medical Sciences, University of Surrey, Guildford, Surrey, UK
| | - Vodathi Bamunuarachchi
- Diabetes Research Unit, Faculty of Medicine, University of Colombo, Colombo, Western, Sri Lanka
| | - Manju Panda
- Institute of Endocrinology Diabetes and Metabolism, Max Healthcare, New Delhi, Delhi, India
| | - Madawa Madawanarachchi
- Diabetes Research Unit, Faculty of Medicine, University of Colombo, Colombo, Western, Sri Lanka
| | - Baldeesh Rai
- School of Public Health, Imperial College London, London, UK
| | - Iqra Sattar
- Punjab Institute of Cardiology, Lahore, Punjab, Pakistan
| | - Wnurinham Silva
- School of Public Health, Imperial College London, London, UK
| | - Swati Waghdhare
- Institute of Endocrinology Diabetes and Metabolism, Max Healthcare, New Delhi, Delhi, India
| | - Marjo-Riitta Jarvelin
- Center for Life Course Health Research, Faculty of Medicine, University of Oulu, Oulu, Finland
- School of Public Health, Imperial College London, London, UK
- Department of Life Sciences, College of Health and Life Sciences, Brunel University, London, UK
- Unit of Primary Care, Oulu University Hospital, Oulu, Finland
| | | | | | - Heather M Gage
- Surrey Health Economics Centre, Department of Clinical and Experimental Medicine, University of Surrey, Guildford, Surrey, UK
| | - Jonathan Valabhji
- Department of Diabetes and Endocrinology, Imperial College London, London, UK
- Department of Metabolism, Digestion and Reproduction, Imperial College London, London, UK
| | - Gary S Frost
- Department of Metabolism, Digestion and Reproduction, Imperial College London, London, UK
| | - Rajitha Wickremasinghe
- Department of Public Health, Faculty of Medicine, University of Kelaniya, Kelaniya, Sri Lanka
| | - Anuradhani Kasturiratne
- Department of Public Health, Faculty of Medicine, University of Kelaniya, Kelaniya, Sri Lanka
| | - Khadija I Khawaja
- Department of Endocrinology & Metabolism, Services Institute of Medical Sciences, Lahore, Punjab, Pakistan
| | - Sajjad Ahmad
- Punjab Institute of Cardiology, Lahore, Punjab, Pakistan
| | - Irene Gm van Valkengoed
- Department of Public and Occupational Health, Amsterdam Public Health research institute, Amsterdam UMC Locatie AMC, Amsterdam, The Netherlands
| | - Prasad Katulanda
- Department of Clinical Medicine, University of Colombo, Colombo, Sri Lanka
| | - Sujeet Jha
- Institute of Endocrinology Diabetes and Metabolism, Max Healthcare, New Delhi, Delhi, India
| | - Jaspal S Kooner
- London North West University Healthcare NHS Trust, Harrow, London, UK
- National Heart & Lung Institute, Faculty of Medicine, Imperial College London, London, UK
| | - John C Chambers
- Lee Kon Chian School of Medicine, Nanyang Technological University, Singapore
- Department of Epidemiology and Biostatistics, Imperial College London, London, UK
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Lele N, Kripa MK, Panda M, Das SK, Nivas AH, Divakaran N, Naik-Gaonkar S, Sawant A, Pattnaik AK, Samal RN, Thangaradjou T, Saravanakumar A, Rodrigues BF, Murthy TVR. Seasonal variation in photosynthetic rates and satellite-based GPP estimation over mangrove forest. Environ Monit Assess 2021; 193:61. [PMID: 33443643 DOI: 10.1007/s10661-021-08846-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Accepted: 01/04/2021] [Indexed: 06/12/2023]
Abstract
In view of increasing anthropogenic influences and global changes, quantification of carbon assimilation through photosynthesis has gained tremendous significance. Precise estimation of Gross Primary Productivity (GPP) is essential for several ecosystem models and is typically done using coarser scale satellite data. The mangrove ecosystem, which offers significant protection to the coastal environment, is one of the critical habitats from a global change point of view. Light use efficiency (LUE) was measured using diurnal in situ photosynthetic rate observations for 13 dominant mangrove species for 3 seasons at each of the three mangrove dominant test-sites situated along the east and west coast of India. Variations in photosynthetic rates among these species were studied for 3 seasons that indicated varying responses of mangrove ecosystem at each site. Among all species, Rhizophora mucronata and Sonneratia apetala indicated higher values at two of the test-sites. IRS Resourcesat-2 LISS-IV datasets were used for the estimation of GPP. Mean GPP for all the sites varied from 1.2 to 7.7 g C m-2 day-1 with maximum value of 14.4 g C m-2 day-1. Mean values of GPP varied across the sites, based on its maximum LUE values and available photosynthetically active radiation (PAR). The results provide GPP values at much better spatial resolution for a threatened habitat like mangroves that typically survive in a narrow habitat along the coasts.
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Affiliation(s)
- N Lele
- Agriculture and Land Ecosystem Division (AED-BPSG-EPSA), Space Applications Centre (ISRO), Ahmedabad, Gujarat, India.
| | - M K Kripa
- Agriculture and Land Ecosystem Division (AED-BPSG-EPSA), Space Applications Centre (ISRO), Ahmedabad, Gujarat, India
| | - M Panda
- Chilika Development Authority, Bhubaneshwar, Odisha, India
| | - S K Das
- Chilika Development Authority, Bhubaneshwar, Odisha, India
| | - A Hari Nivas
- Centre of Advanced Study in Marine Biology, Annamalai University, Parangipettai, Tamil Nadu, India
| | - N Divakaran
- Centre of Advanced Study in Marine Biology, Annamalai University, Parangipettai, Tamil Nadu, India
| | | | - A Sawant
- Botany Department, Goa University, Taleigao, Goa, India
| | - A K Pattnaik
- Chilika Development Authority, Bhubaneshwar, Odisha, India
| | - R N Samal
- Chilika Development Authority, Bhubaneshwar, Odisha, India
| | - T Thangaradjou
- Centre of Advanced Study in Marine Biology, Annamalai University, Parangipettai, Tamil Nadu, India
| | - A Saravanakumar
- Centre of Advanced Study in Marine Biology, Annamalai University, Parangipettai, Tamil Nadu, India
| | - B F Rodrigues
- Botany Department, Goa University, Taleigao, Goa, India
| | - T V R Murthy
- Agriculture and Land Ecosystem Division (AED-BPSG-EPSA), Space Applications Centre (ISRO), Ahmedabad, Gujarat, India
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5
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Agarwal A, Hassanandani T, Das A, Panda M, Chakravorty S. 'Mask tinea': tinea faciei possibly potentiated by prolonged mask usage during the COVID-19 pandemic. Clin Exp Dermatol 2020; 46:190-193. [PMID: 33098693 PMCID: PMC9213933 DOI: 10.1111/ced.14491] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Revised: 10/16/2020] [Accepted: 10/20/2020] [Indexed: 11/26/2022]
Affiliation(s)
- A Agarwal
- Department of Dermatology, IMS & SUM Hospital, Bhubaneshwar, India
| | - T Hassanandani
- Department of Dermatology, IMS & SUM Hospital, Bhubaneshwar, India
| | - A Das
- Department of Dermatology, KPC Medical College and Hospital, Kolkata, India
| | - M Panda
- Department of Dermatology, IMS & SUM Hospital, Bhubaneshwar, India
| | - S Chakravorty
- Department of Microbiology, Bhagirathi Neotia Woman and Child Care Centre, Kolkata, India
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Panda M, Rao MEB, Patra CN, Panda J, Panigrahi KC, Patro G. Formulation and development of floating multiple-unit minitablets of Nimodipine without using a gas-generating agent: in vitro and in vivo characterization. Futur J Pharm Sci 2020. [DOI: 10.1186/s43094-020-0021-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Abstract
Background
Floating drug delivery systems have been reported for different active pharmaceutical ingredients as single-unit tablets with gas-generating agents. In this present research, the formulation of floating multiple-unit minitablets of Nimodipine without using gas-generating agent was attempted with an objective of increased residence time, sustain-release and improved oral bioavailability. Solid dispersion with different ratios (1:0.5, 1:1, 1:1.5, 1:2, 1:2.5) of drug with the lipophilic carrier such as Compritol ATO 888, Gelucire 43/01, G39/01 and Precirol ATO 05 was formulated using melt granulation technique. The adsorbent Sylysia 350 to lipophilic carrier is maintained at 1:1. The granules were compressed into minitablets weighing 15 mg and were filled into a ‘0’ size capsule.
Results
Differential scanning calorimetry study justified no interaction of the drug with excipients. The formulations which exhibited desirable flow property, floating lag time less than 1 min and floating time of 12 h were further characterized for various post-compression parameters. The optimized single-dose (capsule) of floating multiple-unit minitablets of Nimodipine consisting of 60 mg of drug, 120 mg of G43/01 and 120 mg of Sylysia 350 showed an average of floating lag time within 24.48 s, floating time of 14.32 h and sustained-release up to 12 h. Pharmacokinetic study of the optimized formulation (F9) showed nearly 2.5 times increase in area under the curve with increased residence time in comparison to aqueous suspension of Nimodipine. The stability study revealed no significant change in various parameters before and after storage.
Conclusion
Hence, gelucire 43/01-based multiple-unit minitablets of Nimodipine can be considered a promising approach for sustaining the drug release with gastric retention for 12 h without using gas-generating agent.
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Rathore SK, Dwibedi B, Pati SS, Panda S, Panda M, Sabat J, Kar SK. An Investigation on the Coinfection of Measles and HSV-1 in Hospitalized Acute Encephalitis Syndrome Patients in Eastern India. Neurol India 2019; 67:1358-1359. [PMID: 31744976 DOI: 10.4103/0028-3886.271247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Acute encephalitis syndrome (AES) is a clinical condition that occurs due to infectious and noninfectious agents- however, viruses are considered to be the dominant pathogen. agents- however, viruses are considered to be the dominant pathogen. In this study, suspected AES cases were enrolled and tested for viral etiology through serology and polymerase chain reaction (PCR)/reverse transcriptase PCR from August 2012-July 2013. During this period, 820 cases were investigated and 96 cases were diagnosed to have a viral etiology whereas 20 patients had IgM antibodies for measles in serum and HSV-1 DNA in cerebrospinal fluid. All 20 of the patients were children below 14 years of age. The median hospital stay was 15 days (IQR: 14.2-17 days) and median GCS score was 7(IQR: 6-8) and were significantly different with patients with co-infections when comapred with patients having HSV-1 infection only. It may be suspected that the measles infection may have a role in the pathogenesis and thus an impact on the prognosis of the AES when present with HSV-1.
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Affiliation(s)
- S K Rathore
- Virology Division, ICMR-RMRC; Department of Biotechnology, School of Biotechnology, KIIT University, Bhubaneswar, Odisha, India
| | - B Dwibedi
- Virology Division, ICMR-RMRC; Department of Pediatrics, AIIMS, Bhubaneswar, Odisha, India
| | - S S Pati
- Virology Division, ICMR-RMRC, Bhubaneswar, Odisha, India
| | - S Panda
- Virology Division, ICMR-RMRC, Bhubaneswar, Odisha, India
| | - M Panda
- Department of Microbiology, Apollo Hospital, Bhubaneswar, Odisha, India
| | - J Sabat
- Virology Division, ICMR-RMRC, Bhubaneswar, Odisha, India
| | - S K Kar
- IMS and SUM Hospital, Director, Medical Research and Life Sciences, Bhubaneswar, Odisha, India
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Sabat J, Subhadra S, Thakur B, Panda M, Panda S, Pati SS, Ho LM, Dixit S, Rathore SK, Kar SK, Dwibedi B. Molecular and phylogenetic analysis of the dengue strains circulating in Odisha, India. Virusdisease 2019; 30:380-386. [PMID: 31803805 DOI: 10.1007/s13337-019-00544-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Accepted: 07/08/2019] [Indexed: 02/02/2023] Open
Abstract
Dengue has emerged as a major public health challenge in terms of both changing clinical pattern and epidemiological features. The state of Odisha reported first dengue epidemic in the year 2010 and this continued each year in epidemic form during post monsoon period gradually becoming an endemic phenomenon. Present study depicts the changing epidemiological and clinical pattern of dengue with reference to its serotypes and genotypes. The study included 5320 suspected dengue cases from different health facilities of the state during 2010-2017. Dengue NS1 antigen and IgM antibody was done through ELISA. Serotyping was done through RTPCR by amplifying a part of core-pre-membrane gene (CprM) followed by sequencing and phylogenetic analysis. Dengue IgM antibody in 17.7% cases and NS1 antigen in 53.20% cases was detected. Dengue serotype 2 (DEN-2) was the only serotype detected in 2010 and 2011 where as all four serotypes 1, 2, 3, 4 were detected in 2012-2017, DEN-2 being dominant but in 2017 DEN-3 was found to be dominant. Phylogenetic analysis revealed genotype IV of DEN-2 and genotype III of DEN-1 and DEN-3 circulating in this region. In 6 cases involvement of DEN-2 in clinically evident encephalitis cases is an important observation in this region and needs public health attention. High prevalence of dengue was observed without any previous reported outbreaks in the state with increased number of cases from 2010 to 2012 affecting both urban and rural areas. High incidence in 2012 was due to co-circulation of more than one serotype which continued in the following years. Severity in some cases was associated with mixed infection but in most cases it was mild indicating the endemic nature of the virus in most parts of Odisha.
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Affiliation(s)
- J Sabat
- 2ICMR- Regional Medical Research Centre, Bhubaneswar, Odisha 751023 India
| | - S Subhadra
- 2ICMR- Regional Medical Research Centre, Bhubaneswar, Odisha 751023 India
| | - B Thakur
- 2ICMR- Regional Medical Research Centre, Bhubaneswar, Odisha 751023 India
| | - M Panda
- 2ICMR- Regional Medical Research Centre, Bhubaneswar, Odisha 751023 India
| | - S Panda
- 2ICMR- Regional Medical Research Centre, Bhubaneswar, Odisha 751023 India
| | - S S Pati
- 2ICMR- Regional Medical Research Centre, Bhubaneswar, Odisha 751023 India
| | - L M Ho
- 2ICMR- Regional Medical Research Centre, Bhubaneswar, Odisha 751023 India
| | - S Dixit
- 2ICMR- Regional Medical Research Centre, Bhubaneswar, Odisha 751023 India
| | - S K Rathore
- 2ICMR- Regional Medical Research Centre, Bhubaneswar, Odisha 751023 India
| | - S K Kar
- 3Directorate of Medical research, IMS & SUM Hospital, S 'O' A University, Bhubaneswar, Odisha 751030 India
| | - B Dwibedi
- 1Department of Pediatrics, AIIMS, Bhubaneswar, Odisha 751019 India
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Siddiqui S, Waghdhare S, Goel C, Panda M, Soneja H, Sundar J, Banerjee M, Jha S, Dubey S. Augmentation of IL-6 production contributes to development of gestational diabetes mellitus: An Indian study. Diabetes Metab Syndr 2019; 13:895-899. [PMID: 31336542 DOI: 10.1016/j.dsx.2018.12.023] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [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] [Received: 11/28/2018] [Accepted: 12/26/2018] [Indexed: 12/22/2022]
Abstract
AIM Inflammatory mediators like interleukin-6 (IL-6) and acute phase protein like C-reactive protein (CRP) are supposed to contribute to development of GDM, however clinical data supporting this hypothesis is limited. This study was designed to analyze the association of IL-6 and CRP with development of GDM in Indian females. METHODS This case control study included pregnant women diagnosed as GDM (n = 53) and those having normal glucose tolerance (n = 50). Serum levels of IL-6 and CRP were analysed and correlated with various clinical parameters. RESULTS Serum IL-6 levels were significantly high (p < 0.05) in GDM females as compared to control females. IL-6 levels correlated with pre-pregnancy body mass index (BMI), fasting blood sugar (FBS) and postprandial sugar (PPBS). Unlike IL-6, CRP levels did not show significant differences between GDM and control females. However, positive correlation of CRP levels with BMI, FBS and PPBS was observed. CONCLUSION High IL-6 levels in gestational diabetes may indicate a possible role for inflammation in pathophysiology of GDM.
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Affiliation(s)
- Samreen Siddiqui
- Institute of Endocrinology, Diabetes & Metabolism, Max Healthcare Inst. Ltd, Saket, New Delhi, 110017, India; Amity Institute of Virology & Immunology, Amity University Uttar Pradesh, Noida, Uttar Pradesh, 201313, India
| | - Swati Waghdhare
- Institute of Endocrinology, Diabetes & Metabolism, Max Healthcare Inst. Ltd, Saket, New Delhi, 110017, India
| | - Chhavi Goel
- Amity Institute of Virology & Immunology, Amity University Uttar Pradesh, Noida, Uttar Pradesh, 201313, India
| | - Manju Panda
- Institute of Endocrinology, Diabetes & Metabolism, Max Healthcare Inst. Ltd, Saket, New Delhi, 110017, India
| | - Hemi Soneja
- Institute of Endocrinology, Diabetes & Metabolism, Max Healthcare Inst. Ltd, Saket, New Delhi, 110017, India
| | - Jayasree Sundar
- Department of Obstetrics & Gynaecology, Max Healthcare Inst. Ltd, Saket, New Delhi, 110017, India
| | - Meenakshi Banerjee
- Department of Obstetrics & Gynaecology, Max Healthcare Inst. Ltd, Saket, New Delhi, 110017, India
| | - Sujeet Jha
- Institute of Endocrinology, Diabetes & Metabolism, Max Healthcare Inst. Ltd, Saket, New Delhi, 110017, India
| | - Shweta Dubey
- Amity Institute of Virology & Immunology, Amity University Uttar Pradesh, Noida, Uttar Pradesh, 201313, India.
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Jha S, Siddiqui S, Waghdhare S, Panda M, Sinha S, Singh P, Dubey S. Regional prevalence of gestational diabetes mellitus in North India. J Diabetol 2019. [DOI: 10.4103/jod.jod_32_18] [Citation(s) in RCA: 5] [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: 11/04/2022] Open
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11
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Siddiqui S, Waghdhare S, Gopi S, Bhargava A, Panda M, Radha V, Mohan V, Dubey S, Jha S. GCK Gene Screening and Association of GCK Variants With Gestational Diabetes in North Indian Population. Clin Med Insights Endocrinol Diabetes 2018; 11:1179551418806896. [PMID: 30386132 PMCID: PMC6204622 DOI: 10.1177/1179551418806896] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Accepted: 09/20/2018] [Indexed: 11/23/2022]
Abstract
Background: GCK gene variants have been reported to be associated with gestational diabetes mellitus (GDM) in the Caucasian population. There are no reports exploring this association in the Indian population. Methods: This cross-sectional study included subjects from Max Super Speciality Hospital, New Delhi, India, over a span of 6 months. Females diagnosed with GDM as per the International Association of the Diabetes and Pregnancy Study Groups (IADPSG) criteria were enrolled. Direct gene sequencing was performed to screen all 10 exons and promoter region of GCK gene. Results: Out of the total 1000 females screened, 154 subjects had any degree of hyperglycemia. GCK gene screening was done and we observed 11 variants in 80.4% (41/51) of the GDM subset and 89.6% (43/48) of the controls. Allele frequencies of observed variants were not different between the control subjects (12.5%) and those diagnosed with GDM (8.4%). Conclusion: To the best of our knowledge, this is the first report from north India exploring association of GCK variants with GDM and we do not observe any association of GCK variants with GDM in our study population. CTRI Registration No: CTRI/2017/07/008964
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Affiliation(s)
- Samreen Siddiqui
- Institute of Endocrinology, Diabetes & Metabolism, Max Healthcare Institute Ltd., New Delhi, India.,Amity Institute of Virology and Immunology, Amity University Uttar Pradesh (AUUP), Noida, India
| | - Swati Waghdhare
- Institute of Endocrinology, Diabetes & Metabolism, Max Healthcare Institute Ltd., New Delhi, India
| | - Sundaramoorthy Gopi
- Madras Diabetes Research Foundation, ICMR Centre for Advanced Research on Diabetes, Chennai, India
| | - Amit Bhargava
- Institute of Endocrinology, Diabetes & Metabolism, Max Healthcare Institute Ltd., New Delhi, India
| | - Manju Panda
- Institute of Endocrinology, Diabetes & Metabolism, Max Healthcare Institute Ltd., New Delhi, India
| | - Venkatesan Radha
- Madras Diabetes Research Foundation, ICMR Centre for Advanced Research on Diabetes, Chennai, India
| | - Viswanathan Mohan
- Madras Diabetes Research Foundation, ICMR Centre for Advanced Research on Diabetes, Chennai, India.,Dr. Mohan's Diabetes Specialities Centre, WHO Collaborating Centre for Non Communicable Diseases Prevention & Control, IDF Centre of Excellence in Diabetes Care, Chennai, India
| | - Shweta Dubey
- Amity Institute of Virology and Immunology, Amity University Uttar Pradesh (AUUP), Noida, India
| | - Sujeet Jha
- Institute of Endocrinology, Diabetes & Metabolism, Max Healthcare Institute Ltd., New Delhi, India
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Kumar D, Panda M, Mohapatra C, Das R, Sarangi C, Biswal R, Gurudiwan R, Das C. Interhemispheric variations & sexual dimorphism of the length of the fissure of Rolando & Rolandic angle in brains of cadavers of eastern Odisha. J ANAT SOC INDIA 2018. [DOI: 10.1016/j.jasi.2018.06.042] [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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13
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Panda M, Panda N, Swain R, Panigrahi B, Behera P, Das B. Mineral Profiles and Metabolic Status of Animals in North Eastern Ghat Zone of Odisha. ANIM NUTR FEED TECHN 2017. [DOI: 10.5958/0974-181x.2017.00006.3] [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: 10/19/2022]
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15
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Jha S, Dogra S, Yadav A, Siddiqui S, Panda M, Srivastava K, Raghuvanshi L, Kaur S, Bhargava A, Mathur R, Gupta SK, Waghdhare S. A prospective observational study to assess the effectiveness of an electronic health (E-health) and mobile health (M-health) platform versus conventional care for the management of diabetes mellitus. Int J Diabetes Dev Ctries 2016. [DOI: 10.1007/s13410-016-0501-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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16
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Panda D, Panda M. Non-Volatile Flash Memory Characteristics of Tetralayer Nickel-Germanide Nanocrystals Embedded Structure. J Nanosci Nanotechnol 2016; 16:1216-9. [PMID: 27398590 DOI: 10.1166/jnn.2016.11047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Formation of tetralayer memory structure having nickel-germanide nanocrystals using a Ge/Ni multilayers is proposed. X-ray diffraction study shows the NiGe (002) phase formation after proper annealing. Cross sectional HRTEM clearly shows the sharpness and the size (~4-6 nm) of the stacked nanocrystals embedded in the oxide matrix. A large anti-clockwise hysteresis memory win- dow of 13.4 Volt at ± 15 Volt is observed for the optimized samples. This large memory window indicates for the MLC applications. Frequency independent C-V curve confirms about the charge storage in the nanocrystals. A good charge retention and endurance characteristics are exhibited upto 125 °C for the nonvolatile memory application.
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Patra S, Mohapatra C, Sarangi C, Biswal R, Panda M, Pradhan S, Bara D, Nayak S. Incidence of accessory mandibular foramen and its clinical significance. J ANAT SOC INDIA 2015. [DOI: 10.1016/j.jasi.2015.07.152] [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: 10/23/2022]
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18
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Rath S, Panda M, Sahu MC, Padhy RN. Bayesian analysis of two diagnostic methods for paediatric ringworm infections in a teaching hospital. J Mycol Med 2015; 25:191-9. [PMID: 26271198 DOI: 10.1016/j.mycmed.2015.06.065] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2015] [Revised: 06/26/2015] [Accepted: 06/29/2015] [Indexed: 11/30/2022]
Abstract
Quantitatively, conventional methods of diagnosis of tinea capitis or paediatric ringworm, microscopic and culture tests were evaluated with Bayes rule. This analysis would help in quantifying the pervasive errors in each diagnostic method, particularly the microscopic method, as a long-term treatment would be involved to eradicate the infection by the use of a particular antifungal chemotherapy. Secondly, the analysis of clinical data would help in obtaining digitally the fallible standard of the microscopic test method, as the culture test method is taken as gold standard. Test results of 51 paediatric patients were of 4 categories: 21 samples were true positive (both tests positive), and 13 were true negative; the rest samples comprised both 14 false positive (microscopic test positivity with culture test negativity) and 3 false negative (microscopic test negativity with culture test positivity) samples. The prevalence of tinea infection was 47.01% in the population of 51 children. The microscopic test of a sample was efficient by 87.5%, in arriving at a positive result on diagnosis, when its culture test was positive; and, this test was efficient by 76.4%, in arriving at a negative result, when its culture test was negative. But, the post-test probability value of a sample with both microscopic and culture tests would be correct in distinguishing a sample from a sick or a healthy child with a chance of 71.5%. However, since the sensitivity of the analysis is 87.5%, the microscopic test positivity would be easier to detect in the presence of infection. In conclusion, it could be stated that Trychophyton rubrum was the most prevalent species; sensitivity and specificity of treating the infection, by antifungal therapy before ascertaining by the culture method remain as 0.8751 and 0.7642, respectively. A correct/coveted diagnostic method of fungal infection would be could be achieved by modern molecular methods (matrix-assisted laser desorption ionisation-time of flight mass spectrometry or fluorescence in situ hybridization or enzyme-linked immunosorbent assay [ELISA] or restriction fragment length polymorphism or DNA/RNA probes of known fungal taxa) in advanced laboratories.
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Affiliation(s)
- S Rath
- Central Research Laboratory, Institute of Medical Sciences & Sum Hospital, Siksha 'O' Anusandhan University, Bhubaneswar 751003, Odisha, India
| | - M Panda
- Department of Skin and VD, Institute of Medical Sciences & Sum Hospital, Siksha 'O' Anusandhan University, Kalinga Nagar, Bhubaneswar 751003, Odisha, India
| | - M C Sahu
- Central Research Laboratory, Institute of Medical Sciences & Sum Hospital, Siksha 'O' Anusandhan University, Bhubaneswar 751003, Odisha, India
| | - R N Padhy
- Central Research Laboratory, Institute of Medical Sciences & Sum Hospital, Siksha 'O' Anusandhan University, Bhubaneswar 751003, Odisha, India.
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19
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Jha S, Panda M, Kumar S, Gupta R, Neemani A, Jacob J, Thomas NM, James A, Waghdhare S, Agarwal G. Psychological Insulin Resistance in Patients with Type 2 Diabetes. J Assoc Physicians India 2015; 63:33-39. [PMID: 26731825] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
AIMS/HYPOTHESIS To identify risk factors associated with psychological insulin resistance (PIR) in Indian type 2 diabetes (T2DM) population. METHODS Patients with T2DM, aged 18 years, undergoing treatment with oral hypoglycaemic agents and providing written informed consent were considered eligible for the study. Patient's data was collected by face-to-face interaction using 5 validated diabetes questionnaires--Diabetes Attitude Scale, Diabetes Knowledge Test, Diabetes Self-Efficacy Scale, Interpersonal Processes of Care Survey-29, and Barriers to Insulin Treatment scale. Demographic variables, categories of patients based on their annual family income, education, glycosylated haemoglobin (HbA1c), occupation and type of healthcare setup were correlated with overall scores of validated questionnaires. Statistical analyses were performed using Pearson correlation coefficients, analysis of variance, two-group t-test and hierarchical multiple regression. RESULTS One hundred ninty-eight patients with T2DM were enrolled where 63% were males, 52% had HbA1c <7% (<53 mmol/mol), 32% were in service, 35% had the annual family income between Rs 100,000-500,000, 50% were graduates and 81% were enrolled from private healthcare set ups. Significant high opposition to use insulin was observed in females, patients based at home, patients with insufficient education, and patients visiting government set-ups compared to males, service-class patients, graduates, and patients approaching private set-ups, respectively. CONCLUSIONS In India, major factors contributing to PIR were fear of injection or fear of pain during injection, fear of hypoglycemia, social stigma and lack of education. Effective interpersonal interactions with healthcare providers could help to counteract PIR, especially in patients who are not sufficiently literate highlighting the need of skilled healthcare staffs in Indian public hospitals.
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Abstract
The role of steroids in treatment of postinfectious glomerulonephritis (PIGN) has been controversial. The reason for such controversy is the risk of infection relapse associated with steroid therapy. Steroids may have a place in the treatment of resistant cases where renal function does not improve despite aggressive antibiotic therapy as well as in patients with crescentic form of PIGN. We report a case of a 39 year-old Caucasian man who was diagnosed with methicillin-resistant Staphylococcus aureus (MRSA) bacteremia resulting in acute IgA dominant PIGN that failed to respond to antibiotic treatment alone, but responded significantly to steroids in addition to antibiotics. This anecdotal experience suggests that steroids could be considered in conjunction with antibiotic therapy for the treatment of refractory cases of PIGN or crescentic form of PIGN. More studies with long-term follow-up of patients treated with steroids in addition to antimicrobial agents are required to quantify the risk of infection relapse with steroid therapy.
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Affiliation(s)
- A S Kapadia
- Department of Medicine, University of Tennessee College of Medicine, Chattanooga, USA
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Abstract
Removal of hexavalent chromium ions from an aqueous solution by crude tamarind (Tamarindus indica) fruit shell was examined in a rotating packed bed contactor by continuously recirculating a given volume of solution through the bed. Reduction of Cr(VI) to Cr(III) within the biosorbent appeared to be the removal mechanism. Depletion rate of Cr(VI) from, and release of reduced Cr(III) ions into the aqueous phase, was influenced by mass transfer resistance besides pH and packing depth. A mathematical model considering the reduction reaction to be irreversible and incorporating intraparticle and external phase mass transfer resistances represented the experimental data adequately. The study indicated that the limitations of fixed bed contactor operating under terrestrial gravity in intensifying mass transfer rates for this system can be overcome with rotating packed bed due to liquid flow under centrifugal acceleration.
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Affiliation(s)
- M Panda
- Department of Chemical Engineering, Jadavpur University , Kolkata 700032, India
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22
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Singh V, Bhattarai N, Panda M. Iron deficiency in a male with multiple myeloma. Case Reports 2010; 2010:2010/dec15_1/bcr0420102956. [DOI: 10.1136/bcr.04.2010.2956] [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] Open
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23
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Panda M, Thakur AK, Srinivas V. Thermal effects on the percolation behavior of polyvinylidene fluoride/nickel composites. J Appl Polym Sci 2010. [DOI: 10.1002/app.31223] [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: 11/07/2022]
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Kibadi K, Mputu-Yamba JB, Mokassa B, Panda M, Muyembe-Tamfum JJ. [Relapse after surgical treatment of mycobacterium ulcerans infection (buruli ulcer): study of risk factors in 84 patients in the Democratic Republic of the Congo]. Med Trop (Mars) 2009; 69:471-474. [PMID: 20025176] [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: 05/28/2023]
Abstract
OBJECTIVE To identify risk factors for relapse after exclusively surgical treatment of Mycobacterium ulcerans infection (Buruli ulcer). METHODS Study was carried out in 102 patients treated exclusively by surgery for Buruli ulcer at various care facilities in the Congo from January 1, 2000 to January 1, 2005. RESULTS Outcomes included relapse in 22 patients (21.5%), cure in 62 (60.7%), and unknown in 18 (17.6%). Statistical analysis identified the following variables as independent risk factors for relapse after exclusively surgical treatment: incomplete surgical excision (OR = 91.83; P = 0.0000; IC to 95%), age under 16 years (OR = 14.80; P = 0.0000; IC to 95%) and pre-ulcerative Buruli lesions (edema and plaque) (OR = 3.18; P = 0.0215; IC to 95%). CONCLUSION Quality of excision, patient age, and clinical form of lesion are the main predictors of relapse after isolated surgical treatment of Buruli ulcer.
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Affiliation(s)
- K Kibadi
- Département de Chirurgie, Faculté de Médecine, Université de Kinshasa, République Démocratique du Congo.
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Sinan M, Panda M, Ghosh A, Dhara K, Fanwick PE, Chattopadhyay DJ, Goswami S. Mild Synthesis of a Family of Planar Triazinium Cations via Proton-Assisted Cyclization of Pyridyl Containing Azo Compounds and Studies on DNA Intercalation. J Am Chem Soc 2008; 130:5185-93. [DOI: 10.1021/ja710211u] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- M. Sinan
- Department of Inorganic Chemistry, Indian Association for the Cultivation of Science, Kolkata 700 032, India, Department of Bio-Chemistry, University of Calcutta, Kolkata 700 019, India, and Department of Chemistry, Purdue University, West Lafayette, Indiana
| | - M. Panda
- Department of Inorganic Chemistry, Indian Association for the Cultivation of Science, Kolkata 700 032, India, Department of Bio-Chemistry, University of Calcutta, Kolkata 700 019, India, and Department of Chemistry, Purdue University, West Lafayette, Indiana
| | - A. Ghosh
- Department of Inorganic Chemistry, Indian Association for the Cultivation of Science, Kolkata 700 032, India, Department of Bio-Chemistry, University of Calcutta, Kolkata 700 019, India, and Department of Chemistry, Purdue University, West Lafayette, Indiana
| | - K. Dhara
- Department of Inorganic Chemistry, Indian Association for the Cultivation of Science, Kolkata 700 032, India, Department of Bio-Chemistry, University of Calcutta, Kolkata 700 019, India, and Department of Chemistry, Purdue University, West Lafayette, Indiana
| | - P. E. Fanwick
- Department of Inorganic Chemistry, Indian Association for the Cultivation of Science, Kolkata 700 032, India, Department of Bio-Chemistry, University of Calcutta, Kolkata 700 019, India, and Department of Chemistry, Purdue University, West Lafayette, Indiana
| | - D. J. Chattopadhyay
- Department of Inorganic Chemistry, Indian Association for the Cultivation of Science, Kolkata 700 032, India, Department of Bio-Chemistry, University of Calcutta, Kolkata 700 019, India, and Department of Chemistry, Purdue University, West Lafayette, Indiana
| | - S. Goswami
- Department of Inorganic Chemistry, Indian Association for the Cultivation of Science, Kolkata 700 032, India, Department of Bio-Chemistry, University of Calcutta, Kolkata 700 019, India, and Department of Chemistry, Purdue University, West Lafayette, Indiana
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Panda M, Kar K. HIV, hepatitis B and C infection status of the blood donors in a blood bank of a tertiary health care centre of Orissa. Indian J Public Health 2008; 52:43-44. [PMID: 18700722] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023] Open
Abstract
A record based retrospective study was conducted at the blood bank of SCB Medical College, Cuttack. All the donors who had donated blood from June to December 2005 were considered. 91.7%of the donors were males and majority belonged to 21-30 years age group. 1.98% of the donors were positive for hepatitis C, 1.13% for hepatitis B and 0.35% for HIV. For HBV infection, majority belonged to 31-40 years age group. But for HCV and HIV infection more were in the 21-30 year age group. Significantly more number of exchange donors was positive for HBV and HCV in comparison to voluntary donors in blood bank and camp. No voluntary donors from the camp were HIV positive.
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Affiliation(s)
- M Panda
- SCB Medical College, Cuttack.
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Simpson E, Panda M, Enzenauer R. 321 EVIDENCE-BASED ADVERTISING IN RHEUMATOLOGY. J Investig Med 2006. [DOI: 10.2310/6650.2005.x0008.320] [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: 11/18/2022]
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Mannepalli S, Manthabala T, Panda M, Moffitt B. 355 DETERMINANTS OF ORDERING SERUM PROLACTIN AND ITS UTILITY IN PATIENTS WITH SEIZURES AND PSEUDOSEIZURES. J Investig Med 2006. [DOI: 10.2310/6650.2005.x0008.354] [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: 11/18/2022]
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Mannepalli S, Manthabala T, Panda M, Moffitt B. 109 DETERMINANTS OF ORDERING SERUM PROLACTIN AND ITS UTILITY IN PATIENTS WITH SEIZURES AND PSEUDOSEIZURES. J Investig Med 2006. [DOI: 10.2310/6650.2005.x0008.108] [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: 11/18/2022]
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30
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Jáchymová M, Martásek P, Panda S, Roman LJ, Panda M, Shea TM, Ishimura Y, Kim JJP, Masters BSS. Recruitment of governing elements for electron transfer in the nitric oxide synthase family. Proc Natl Acad Sci U S A 2005; 102:15833-8. [PMID: 16249336 PMCID: PMC1276075 DOI: 10.1073/pnas.0506522102] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [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: 11/18/2022] Open
Abstract
At least three building blocks are responsible for the molecular basis of the modulation of electron transfer in nitric oxide synthase (NOS) isoforms: the calmodulin-binding sequence, the C-terminal extension, and the autoregulatory loop in the reductase domain. We have attempted to impart the control conferred by the C termini of NOS to cytochrome P450 oxidoreductase (CYPOR), which contains none of these regulatory elements. The effect of these C termini on the properties of CYPOR sheds light on the possible evolutionary origin of NOS and addresses the recruitment of new peptides on the development of new functions for CYPOR. The C termini of NOSs modulate flavoprotein-mediated electron transfer to various electron acceptors. The reduction of the artificial electron acceptors cytochrome c, 2,6-dichlorophenolindophenol, and ferricyanide was inhibited by the addition of any of these C termini to CYPOR, whereas the reduction of molecular O(2) was increased. This suggests a shift in the rate-limiting step, indicating that the NOS C termini interrupt electron flux between flavin mononucleotide (FMN) and flavin adenine dinucleotide (FAD) and/or the electron acceptors. The modulation of CYPOR by the addition of the NOS C termini is also supported by flavin reoxidation and fluorescence-quenching studies and antibody recognition of the C-terminal extension. These experiments support the origin of the NOS enzymes from modules consisting of a heme domain and CYPOR or ferredoxin-NADP(+) reductase- and flavodoxin-like subdomains that constitute CYPOR, followed by further recruitment of smaller modulating elements into the flavin-binding domains.
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Affiliation(s)
- M Jáchymová
- Department of Biochemistry, University of Texas Health Science Center, San Antonio, TX 78229-3900, USA
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31
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Katrapati P, Panda M. 163 ACCURACY OF SELF-AUDITS IN AN OUTPATIENT RESIDENT CLINIC:. J Investig Med 2005. [DOI: 10.2310/6650.2005.00006.162] [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: 11/18/2022]
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32
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Katrapati P, Panda M. 241 ACCURACY AND USEFULNESS OF SELF-AUDITS IN AN OUTPATIENT RESIDENT CLINIC:. J Investig Med 2005. [DOI: 10.2310/6650.2005.00006.240] [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: 11/18/2022]
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33
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Perry B, Panda M, Okosun IS. 127 EXPLORING NEW MEANINGS FOR AN OLD SYMBOL: PATIENTS' ATTITUDES AND PERCEPTIONS OF MALE AND FEMALE PHYSICIANS DRESSED WITH AND WITHOUT TRADITIONAL WHITE COATS. J Investig Med 2004. [DOI: 10.1136/jim-52-suppl1-680] [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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34
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Jones RC, Panda M, Desbiens N. 264 DO INTERNAL MEDICINE RESIDENTS ACCURATELY ASSESS THEIR MEDICAL KNOWLEDGE? J Investig Med 2004. [DOI: 10.1136/jim-52-suppl1-817] [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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35
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Panda M, Ball T, Desbiens N. 258 GRADUATES' PERCERPTIONS OF THE VALUE OF AN “EDUCATION FOR LIFE” REQUIREMENT IN AN INTERNAL MEDICINE RESIDENCY PROGRAM. J Investig Med 2004. [DOI: 10.1136/jim-52-suppl1-811] [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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36
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Sudha R, Panda M, Chandrasekhar J, Balaram P. Structural effects on the formation of proton and alkali metal ion adducts of apolar, neutral peptides: electrospray ionization mass spectrometry and Ab initio theoretical studies. Chemistry 2002; 8:4980-91. [PMID: 12487135 DOI: 10.1002/1521-3765(20021104)8:21<4980::aid-chem4980>3.0.co;2-m] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Apolar, neutral peptides have been shown to ionize extremely well under the conditions used for electrospray ionization mass spectrometry (ESIMS). Peptides for which the conformations have been independently determined in solution and in crystals have been examined by ESIMS. Studies of peptide helices ranging from 7 to 18 residues reveal that shorter helices yield exclusively singly charged ions, while in larger helices multiply charged species are detectable. Multiple sites for protonation/metallation are introduced in the helix by proline insertion or by changing the chirality in the residue. The preferred site of cation binding to helices may be the C-terminus end, where three free CO groups are available for chelation. Ab initio and DFT calculations at several levels have been carried out for the binding of H+, Li+, Na+, and K+ to CHO-(Gly)3)-OMe. The results reveal that metallation in helices is favoured by chelation to carbonyl groups at the C-terminus, while protonation involved two carbonyl groups and thus favour a 10-membered cyclic hydrogen-bonded structure. In -strands, metallation/protonation occurs at isolated carbonyl groups. Collision induced fragmentation of hydrophobic peptides under ESI conditions reveals that helix fragmentation occurs predominantly from the C-terminus, while in -hairpins cleavage occurs simultaneously at multiple sites.
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Affiliation(s)
- R Sudha
- Molecular Biophysics Unit, Department of Organic Chemistry, Indian Institute of Science, Bangalore, India
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37
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Panda M, Smoot AL, Horowitz PM. The 4,4'-dipyridyl disulfide-induced formation of GroEL monomers is cooperative and leads to increased hydrophobic exposure. Biochemistry 2001; 40:10402-10. [PMID: 11513619 DOI: 10.1021/bi010831x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [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
The molecular chaperone, GroEL, is completely disassembled into monomers by the addition of 4,4'-dipyridyl disulfide. The dissociation leads to monomers in a kinetically controlled process. The additions of functional ligands of GroEL such as Mg(2+) or adenine nucleotides produced differences in the observed rates, but at the end of the kinetics, the dissociation was complete. In addition to the information obtained from native gels, the fluorescent probe bis-ANS was utilized to follow the monomer formation. The results demonstrate that the formation of monomers was associated with the exposure of hydrophobic surfaces. This assessment was possible without the use of added chaotropes, such as urea, to dissociate GroEL. Dissociation kinetics were also followed by light scattering. The kinetics of dissociation of the 14mer are cooperative with respect to the concentration of 4,4'-DPDS. Thermodynamic parameters for the kinetic process gave a free energy of activation (DeltaG) of 19.3 +/- 1.2 kcal mol(-1), which was decomposed to an enthalpy of activation (DeltaH) of 19.30 +/- 1.2 kcal mol(-1) and an entropy of activation (DeltaS) of -8.2 +/- 3.9 cal mol(-1) K(-1). We conclude that the dissociation of GroEL observed in this investigation is an enthalpy-controlled process.
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Affiliation(s)
- M Panda
- Department of Biochemistry, University of Texas Health Science Center at San Antonio, San Antonio, Texas 78229-3900, USA
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Smoot AL, Panda M, Brazil BT, Buckle AM, Fersht AR, Horowitz PM. The binding of bis-ANS to the isolated GroEL apical domain fragment induces the formation of a folding intermediate with increased hydrophobic surface not observed in tetradecameric GroEL. Biochemistry 2001; 40:4484-92. [PMID: 11284705 DOI: 10.1021/bi001822b] [Citation(s) in RCA: 63] [Impact Index Per Article: 2.7] [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
The extent of hydrophobic exposure upon bis-ANS binding to the functional apical domain fragment of GroEL, or minichaperone (residues 191-345), was investigated and compared with that of the GroEL tetradecamer. Although a total of seven molecules of bis-ANS bind cooperatively to this minichaperone, most of the hydrophobic sites were induced following initial binding of one to two molecules of probe. From the equilibrium and kinetics studies at low bis-ANS concentrations, it is evident that the native apical domain is converted to an intermediate conformation with increased hydrophobic surfaces. This intermediate binds additional bis-ANS molecules. Tyrosine fluorescence detected denaturation demonstrated that bis-ANS can destabilize the apical domain. The results from (i) bis-ANS titrations, (ii) urea denaturation studies in the presence and absence of bis-ANS, and (iii) intrinsic tyrosine fluorescence studies of the apical domain are consistent with a model in which bis-ANS binds tightly to the intermediate state, relatively weakly to the native state, and little to the denatured state. The results suggest that the conformational changes seen in apical domain fragments are not seen in the intact GroEL oligomer due to restrictions imposed by connections of the apical domain to the intermediate domain and suppression of movement due to quaternary structure.
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Affiliation(s)
- A L Smoot
- Department of Biochemistry, University of Texas Health Science Center at San Antonio, San Antonio, Texas 78229-3900, USA
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Panda M, Ybarra J, Horowitz PM. High hydrostatic pressure can probe the effects of functionally related ligands on the quaternary structures of the chaperonins GroEL and GroES. J Biol Chem 2001; 276:6253-9. [PMID: 11085994 DOI: 10.1074/jbc.m009530200] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [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: 11/06/2022] Open
Abstract
We investigated the effects of high hydrostatic pressure in the range of 1--3 kilobars on tetradecameric GroEL, heptameric GroES, and the GroEL-GroES complex. Unlike GroEL monomers formed by urea dissociation, which can be reassembled back to the tetradecamer, the pressure-dissociated monomers do not reassemble readily. This indicates an alteration of their native structures, an example of conformational drift. Pressure versus time profiles and kinetics of the dissociation of both GroEL and GroES at fixed pressures were monitored by light scattering. Unlike GroEL, GroES monomers do reassociate readily. Reaction conditions were varied by adding ATP, Mg(2+), ADP, AMP-PNP, and KCl. At any individual pressure, the dissociation process is governed by both thermodynamics and kinetics. This leads to the decrease in the yield of monomers at lower pressures. In the presence of Mg(2+) and KCl, GroEL is stable up to 3 kilobars. The presence of either ATP or ADP but not AMP-PNP leads to GroEL dissociation at lower pressures. Interestingly, the GroEL-GroES complex is very stable in the range of 1--2.5 kilobars. However, the addition of ADP destabilizes the complex, which dissociates completely at 1.5 kilobars. The results are rationalized in terms of different degrees of cooperativity between individual monomers and heptameric rings in the GroEL tetradecamer. Such allosteric interactions leading to the alteration of quaternary structure of GroEL in the absence of chemical denaturants are important in understanding the mechanism of chaperonin-assisted protein folding by the GroEL-GroES system.
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Affiliation(s)
- M Panda
- Department of Biochemistry, University of Texas Health Science Center, San Antonio, Texas 78229-3900, USA
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40
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Abstract
Unfolded bovine rhodanese, a sulfurtransferase, does not regain full activity upon refolding due to the formation of aggregates and disulfide-linked misfolded states unless a large excess of reductant such as 200 mM beta-ME and 5 mg/ml detergent are present [Tandon and Horowitz (1990), J. Biol. Chem. 265, 5967]. Even then, refolding is incomplete. We have studied the unfolding and refolding of three rhodanese forms whose crystal structures are known: ES, containing the transferred sulfur as a persulfide; E, without the transferred sulfur, and carboxymethylated rhodanese (CMR), in which the active site was blocked by chemical modification. The X-ray structures of ES, E, and CMR are virtually the same, but their tertiary structures in solution differ somewhat as revealed by near-UV CD. Among these three, CMR is the only form of rhodanese that folds reversibly, requiring 1 mM DTT. A minimum three-state folding model of CMR (N<-->I<-->U) followed by fluorescence at 363 nm, (N<-->I) by fluorescence at 318 nm, and CD (I<-->U) is consistent with the presence of a thermodynamically stable molten globule intermediate in 5-6 M urea. We conclude that the active-site sulfhydryl group in the persulfide form is very reactive; therefore, its modification leads to the successful refolding of urea-denatured rhodanese even in the absence of a large excess of reductant and detergent. The requirement for DTT for complete reversibility of CMR suggests that oxidation among the three non-active-site SH groups can represent a minor trap for refolding through species that can be easily reduced.
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Affiliation(s)
- M Panda
- Department of Biochemistry, University of Texas Health Science Center at San Antonio, 78229-3900, USA
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41
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Abstract
A dominant feature of folding of cytochrome c is the presence of nonnative His-heme kinetic traps, which either pre-exist in the unfolded protein or are formed soon after initiation of folding. The kinetically trapped species can constitute the majority of folding species, and their breakdown limits the rate of folding to the native state. A temperature jump (T-jump) relaxation technique has been used to compare the unfolding/folding kinetics of yeast iso-2 cytochrome c and a genetically engineered double mutant that lacks His-heme kinetic traps, H33N,H39K iso-2. The results show that the thermodynamic properties of the transition states are very similar. A single relaxation time tau(obs) is observed for both proteins by absorbance changes at 287 nm, a measure of solvent exclusion from aromatic residues. At temperatures near Tm, the midpoint of the thermal unfolding transitions, tau(obs) is four to eight times faster for H33N,H39K iso-2 (tau(obs) approximately 4-10 ms) than for iso-2 (tau(obs) approximately 20-30 ms). T-jumps show that there are no kinetically unresolved (tau < 1-3 micros T-jump dead time) "burst" phases for either protein. Using a two-state model, the folding (k(f)) and unfolding (k(u)) rate constants and the thermodynamic activation parameters standard deltaGf, standard deltaGu, standard deltaHf, standard deltaHu, standard deltaSf, standard deltaSu are evaluated by fitting the data to a function describing the temperature dependence of the apparent rate constant k(obs) (= tau(obs)(-1)) = k(f) + k(u). The results show that there is a small activation enthalpy for folding, suggesting that the barrier to folding is largely entropic. In the "new view," a purely entropic kinetic barrier to folding is consistent with a smooth funnel folding landscape.
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Affiliation(s)
- M Panda
- Center for Biomolecular Structure, Department of Biochemistry, University of Texas Health Science Center, San Antonio 78229-3900, USA
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42
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Abstract
The competition between protein aggregation and folding has been investigated using rhodanese (thiosulfate:cyanide sulfurtransferase, EC 2.8.1.1) as a model. During folding from a urea-denatured state, rhodanese rapidly forms associated species or intermediates, some of which are large and/or sticky. The early removal of such particles by filtration results in a decreased refolding yield. With time, a portion of the smaller aggregates can partition back first to intermediates and then to refolded protein, while a fraction of these irreversibly form unproductive higher aggregates. Dynamic light scattering measurements indicate that the average sizes of the aggregates formed during rhodanese folding increase from 225 to 325 nm over 45 min and they become increasingly heterogeneous. Glycerol addition or the application of high hydrostatic pressure improved the final refolding yields by stabilizing smaller particles. Although addition of glycerol into the refolding mixture blocks the formation of unproductive aggregates, it cannot dissociate them back to productive intermediates. The presence of 3.9 M urea keeps the aggregates small, and they can be dissociated to monomers by high hydrostatic pressure even after 1 h of incubation. These studies suggest that early associated intermediates formed during folding can be reversed to give active species.
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Affiliation(s)
- M Panda
- Department of Biochemistry, University of Texas Health Science Center, San Antonio, Texas 78284, USA
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43
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Bernstein C, Bernstein H, Garewal H, Dinning P, Jabi R, Sampliner RE, McCuskey MK, Panda M, Roe DJ, L'Heureux L, Payne C. A bile acid-induced apoptosis assay for colon cancer risk and associated quality control studies. Cancer Res 1999; 59:2353-7. [PMID: 10344743] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
Abstract
Bile acids are important in the etiology of colorectal cancer. Bile acids induce apoptosis in colonic goblet cells at concentrations comparable to those found in fecal water after high-fat meals. Preliminary evidence indicated that cells of the normal-appearing (nontumorous) portion of the colon epithelium of colon cancer patients are more resistant to bile salt-induced apoptosis than are cells from normal individuals. In the present study, 68 patients were examined, and biopsies were taken at 20 cm from the anal verge, cecum, and descending colon. The patients included 17 individuals with a history of colorectal cancer, 37 individuals with adenomas, and 14 individuals who were neoplasia free. The mean bile salt-induced apoptotic index among normal individuals was 57.6 +/- 3.47 (SE), which differed significantly (P < 0.05) from the mean value of 36.41 +/- 3.12 in individuals with a history of colon cancer. The correlation between independent observers was 0.89 (P < 0.001), indicating good interobserver reliability. Components of variance comparing interindividual versus intraindividual sources of variation suggested that site-to-site variability, both between regions of the colon and for adjacent biopsies, was larger than the interpatient variability for individuals with a history of neoplasia. Therefore, there was "patchiness" of the susceptibility of regions of the colon to bile acid-induced apoptosis in individuals with a history of neoplasia (a patchy field effect). There was no obvious correlation of low-apoptotic index regions with regions in which previous neoplasias had been found and removed. On the other hand, for normal, i.e., neoplasia-free, individuals, there was relatively less intraindividual variation compared to interindividual variation. Our assay shows an association between resistance to bile acid-induced apoptosis, measured at 20 cm from the anal verge, and colon cancer risk. Thus, this assay may prove useful as a biomarker of colon cancer risk.
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Affiliation(s)
- C Bernstein
- Department of Microbiology and Immunology, College of Medicine, University of Arizona, Tucson 85724, USA.
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Abstract
From 1984 to 1994, 41 cases of chronic osteomyelitis were treated in Kinshasa by the Papineau technique; 75.5% were men and 24.5% women. The mean age was 28 years (range: 7-77), and the average duration of the infection was 3 years (range: 1 month to 28 years). The aetiology was "trauma" in 53.5%, haematogenous in 44% and drepanocytosis in 2.5%. Infections of the femur and tibia each constituted 41.5% of the cases. Immobilisation was by external fixation in 44%, and by a cast in 39%. Wound healing was complete after an average of 3 months with spontaneous healing, and in 4.5 months after skin grafting. Control of the infection and bone healing were obtained in 89% after a period of 3-7 months. We discuss the Papineau technique and the modifications which were required in Kinshasa.
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Affiliation(s)
- M Panda
- Service d'Orthopédie Traumatologie, Cliniques Universitaires de Kinshasa, République Démocratique du Congo
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45
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Panda M, Behera P, Mishra B, Behera G. Photochemistry in microemulsions: fluorescence quenching of naphthols by some γ-picolinium salts. J Photochem Photobiol A Chem 1998. [DOI: 10.1016/s1010-6030(97)00288-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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46
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Abstract
The kinetics of cyanide binding to cytochrome c oxidase were systematically studied as a function of [HCN], [oxidase], pH, ionic strength, temperature, type and concentration of solubilizing detergent, and monomer-dimer content of oxidase. On the basis of these results a minimum reaction mechanism is proposed in which the spectrally visible rapid and slow cyanide binding reactions are two consecutive first-order reactions, not parallel reactions with different conformers of cytochrome c oxidase. The fast reaction (k'obs) follows saturation type kinetics to form an HCN complex that subsequently undergoes a slow reaction (k'obs). The fast k'obs reaction is independent of ionic strength but is strongly dependent upon pH. Two pK values were evaluated from the bell-shaped rate versus pH profile; one is due to an ionizable group on the protein (pKa = 7.45), while the other is that of HCN (pKHCN = 9.15). Therefore, oxidase is reactive toward HCN only when the group on the protein is unprotonated. The slow k'obs reaction is not a reaction of oxidase with either CN- or HCN; in fact, the product formed by the fast k'obs reaction, the oxidase-HCN complex, still undergoes the slow k" process even if all of the excess KCN is removed. The apparent rate constant of the slower phase (k"obs) is independent of all the variations done in this study, and it probably corresponds to either a slow conformational change in the protein or a change in ligand coordination at one of the metal centers after HCN binds to the bimetallic center of oxidase. Based upon the bell-shaped pH dependence of the fast phase and the pH independence of the slow phase, the mechanism also predicts that a single conformer of cytochrome c oxidase can exhibit either monophasic or biphasic cyanide binding kinetics depending upon the pH. At either very low or very high pH, the two rates become comparable in magnitude, which makes the reaction appear to be monophasic even though both reactions still occur. The amount of monomeric or dimeric oxidase only slightly affects the magnitude of k'obs and k"obs values, and both processes are clearly present in both types of oxidase.
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Affiliation(s)
- M Panda
- Department of Biochemistry, University of Texas Health Science Center, San Antonio 78284-7760, USA
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47
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Panda M, Behera P, Mishra B, Behera G. Photochemistry in microemulsions: fluorescence quenching of 1- and 2-naphthol by Cu2+. J Photochem Photobiol A Chem 1995. [DOI: 10.1016/1010-6030(95)04062-k] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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Abstract
The improvement of land management practices on lands susceptible to desertification requires information on the status and condition of the existing resources as well as any change occurring in the resource condition over time. The Environmental Monitoring and Assessment Program (EMAP) of the U.S. Environmental Protection Agency has developed a statistical survey design for monitoring the condition of ecological resources on large spatial scales. EMAP-Rangelands used a uniformity sampling study in 1993 to evaluate response plot designs for three categories of indicators (soils, vegetation, and spectral reflectance) to be used for monitoring ecological condition of a site. The response plot design study was developed to integrate on-site measurements for the three indicator categories. The study was conducted on the Colorado Plateau in southern Utah in three rangeland resource classes (grassland, desertscrub, and conifer woodland) of differing productivity levels in an attempt to develop a common plot design for all three resource classes. Basic measurement units were developed to facilitate integration of data collection. Preliminary spatial analysis of the sampling study found considerable differences in variation patterns among the study sites and measurement categories for the indicator classes used by EMAP-Rangelands. Evidence of substantial trends in the indicator measurements on monitoring sites relative to regional trends leads to the conclusion that nonstationary spatial models for biological processes on a monitoring site may be needed to fulfill the requirements for developing plot designs and indicator criteria.
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Affiliation(s)
- R O Kuehl
- The University of Arizona, 85721, Tucson, AZ
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49
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Abstract
Forty-seven digits in 21 patients who sustained partial or complete amputations from the home use of power tools were replanted or revascularized during a 1-year period. This represented 69% of the microvascular surgery performed for hand injuries during that year. The cost of repairing an average of 2.4 digits was $7000 (surgeon's fee) plus $697 per hour (operating room fee), as per fiscal year 1987. Postoperative hospitalization averaged 15 days at a cost of $15,679. Hand rehabilitation averaged 8 months at a cost of $3348. Fifty-four percent of the patients had no insurance. Fourteen of 21 patients (67%) required at least one additional procedure. Two patients had to make a career change after the injury. The majority of patients with digital replantations were dissatisfied with the emotional costs and the number of subsequent operations. Lack of patient and family awareness of the length of the rehabilitative period was particularly evident.
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Affiliation(s)
- F N Lukash
- Division of Plastic and Reconstructive Surgery, Massachusetts General Hospital, Boston
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50
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Abstract
The pedicled ulnar nerve transfer (St. Clair Strange procedure) preserves the intrinsic blood supply to the transferred nerve and allows bridging of large defects in avascular, scarred wounds. We report our indications for this operation, describe the two operative stages, and report the results in seven patients. After operation progressive median nerve axonal growth in a proximal direction up the ulnar nerve was shown by a median nerve Tinel's sign. Five patients followed for a mean of 10 years achieved protective sensibility in the median nerve distribution. In two of the three patients in whom distal nerve repair was done to the median and ulnar nerve, protective sensibility also returned to the ulnar digits. Localization, stereognoses, and vibratory response was achieved in the majority of digits. All patients had active use of the hand, but none had meaningful two-point discrimination. No changes were found after a superficial radial nerve block excluded any radial nerve contribution. No intrinsic motor functional return was noted. Two patients are currently being followed.
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Affiliation(s)
- B M Greenberg
- Department of Physical Therapy, Massachusetts General Hospital/Harvard Medical School, Boston 02114
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