1
|
Mota GD, Marques CL, Ribeiro SL, Albuquerque C, Castro G, Fernandino D, Omura F, Ranzolin A, Resende G, Silva N, Souza M, Studart S, Xavier R, Yazbek M, Pinheiro MM. HLA-B27 did not protect against COVID-19 in patients with axial spondyloarthritis - data from the ReumaCov-Brasil Registry. Adv Rheumatol 2023; 63:56. [PMID: 38031143 DOI: 10.1186/s42358-023-00340-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Accepted: 11/20/2023] [Indexed: 12/01/2023] Open
Abstract
BACKGROUND Some studies have suggested the HLA-B27 gene may protect against some infections, as well as it could play a benefit role on the viral clearance, including hepatitis C and HIV. However, there is lack of SARS-CoV-2 pandemic data in spondyloarthritis (SpA) patients. AIM To evaluate the impact of HLA-B27 gene positivity on the susceptibility and severity of COVID-19 and disease activity in axial SpA patients. METHODS The ReumaCoV-Brasil is a multicenter, observational, prospective cohort designed to monitor immune-mediated rheumatic diseases patients during SARS-CoV-2 pandemic in Brazil. Axial SpA patients, according to the ASAS classification criteria (2009), and only those with known HLA-B27 status, were included in this ReumaCov-Brasil's subanalysis. After pairing them to sex and age, they were divided in two groups: with (cases) and without (control group) COVID-19 diagnosis. Other immunodeficiency diseases, past organ or bone marrow transplantation, neoplasms and current chemotherapy were excluded. Demographic data, managing of COVID-19 (diagnosis, treatment, and outcomes, including hospitalization, mechanical ventilation, and death), comorbidities, clinical details (disease activity and concomitant medication) were collected using the Research Electronic Data Capture (REDCap) database. Data are presented as descriptive analysis and multiple regression models, using SPSS program, version 20. P level was set as 5%. RESULTS From May 24th, 2020 to Jan 24th, 2021, a total of 153 axial SpA patients were included, of whom 85 (55.5%) with COVID-19 and 68 (44.4%) without COVID-19. Most of them were men (N = 92; 60.1%) with mean age of 44.0 ± 11.1 years and long-term disease (11.7 ± 9.9 years). Regarding the HLA-B27 status, 112 (73.2%) patients tested positive. There were no significant statistical differences concerning social distancing, smoking, BMI (body mass index), waist circumference and comorbidities. Regarding biological DMARDs, 110 (71.8%) were on TNF inhibitors and 14 (9.15%) on IL-17 antagonists. Comparing those patients with and without COVID-19, the HLA-B27 positivity was not different between groups (n = 64, 75.3% vs. n = 48, 48%, respectively; p = 0.514). In addition, disease activity was similar before and after the infection. Interestingly, no new episodes of arthritis, enthesitis or extra-musculoskeletal manifestations were reported after the COVID-19. The mean time from the first symptoms to hospitalization was 7.1 ± 3.4 days, and although the number of hospitalization days was numerically higher in the B27 positive group, no statistically significant difference was observed (5.7 ± 4.11 for B27 negative patients and 13.5 ± 14.8 for B27 positive patients; p = 0.594). Only one HLA-B27 negative patient died. No significant difference was found regarding concomitant medications, including conventional or biologic DMARDs between the groups. CONCLUSIONS No significant difference of COVID-19 frequency rate was observed in patients with axial SpA regarding the HLA-B27 positivity, suggesting a lack of protective effect with SARS-CoV-2 infection. In addition, the disease activity was similar before and after the infection. TRIAL REGISTRATION This study was approved by the Brazilian Committee of Ethics in Human Research (CONEP), CAAE 30186820.2.1001.8807, and was registered at the Brazilian Registry of Clinical Trials - REBEC, RBR-33YTQC. All patients read and signed the informed consent form before inclusion.
Collapse
Affiliation(s)
- G D Mota
- UNIFESP, Rua Borges Lagoa, 913/ 51-53 - Vila Clementino, São Paulo, CEP: 04038-034, SP, Brazil
| | | | | | | | | | | | - F Omura
- Clinica Omura, S?o Paulo, Brazil
| | | | | | | | - M Souza
- SCBH, Belo Horizonte, Brazil
| | | | | | | | - Marcelo M Pinheiro
- UNIFESP, Rua Borges Lagoa, 913/ 51-53 - Vila Clementino, São Paulo, CEP: 04038-034, SP, Brazil.
| |
Collapse
|
2
|
Machado PM, Schäfer M, Mahil SK, Liew J, Gossec L, Dand N, Pfeil A, Strangfeld A, Regierer AC, Fautrel B, Alonso CG, Saad CGS, Griffiths CEM, Lomater C, Miceli-Richard C, Wendling D, Alpizar Rodriguez D, Wiek D, Mateus EF, Sirotich E, Soriano ER, Ribeiro FM, Omura F, Rajão Martins F, Santos H, Dau J, Barker JN, Hausmann J, Hyrich KL, Gensler L, Silva L, Jacobsohn L, Carmona L, Pinheiro MM, Zelaya MD, Severina MDLÁ, Yates M, Dubreuil M, Gore-Massy M, Romeo N, Haroon N, Sufka P, Grainger R, Hasseli R, Lawson-Tovey S, Bhana S, Pham T, Olofsson T, Bautista-Molano W, Wallace ZS, Yiu ZZN, Yazdany J, Robinson PC, Smith CH. Characteristics associated with poor COVID-19 outcomes in people with psoriasis, psoriatic arthritis and axial spondyloarthritis: data from the COVID-19 PsoProtect and Global Rheumatology Alliance physician-reported registries. Ann Rheum Dis 2023; 82:698-709. [PMID: 36787993 PMCID: PMC10176347 DOI: 10.1136/ard-2022-223499] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Accepted: 01/24/2023] [Indexed: 02/16/2023]
Abstract
OBJECTIVES To investigate factors associated with severe COVID-19 in people with psoriasis (PsO), psoriatic arthritis (PsA) and axial spondyloarthritis (axSpA). METHODS Demographic data, clinical characteristics and COVID-19 outcome severity of adults with PsO, PsA and axSpA were obtained from two international physician-reported registries. A three-point ordinal COVID-19 severity scale was defined: no hospitalisation, hospitalisation (and no death) and death. ORs were estimated using multivariable ordinal logistic regression. RESULTS Of 5045 cases, 18.3% had PsO, 45.5% PsA and 36.3% axSpA. Most (83.6%) were not hospitalised, 14.6% were hospitalised and 1.8% died. Older age was non-linearly associated with COVID-19 severity. Male sex (OR 1.54, 95% CI 1.30 to 1.83), cardiovascular, respiratory, renal, metabolic and cancer comorbidities (ORs 1.25-2.89), moderate/high disease activity and/or glucocorticoid use (ORs 1.39-2.23, vs remission/low disease activity and no glucocorticoids) were associated with increased odds of severe COVID-19. Later pandemic time periods (ORs 0.42-0.52, vs until 15 June 2020), PsO (OR 0.49, 95% CI 0.37 to 0.65, vs PsA) and baseline exposure to TNFi, IL17i and IL-23i/IL-12+23i (OR 0.57, 95% CI 0.44 to 0.73; OR 0.62, 95% CI 0.45 to 0.87; OR 0.67, 95% CI 0.45 to 0.98; respectively; vs no disease-modifying antirheumatic drug) were associated with reduced odds of severe COVID-19. CONCLUSION Older age, male sex, comorbidity burden, higher disease activity and glucocorticoid intake were associated with more severe COVID-19. Later pandemic time periods, PsO and exposure to TNFi, IL17i and IL-23i/IL-12+23i were associated with less severe COVID-19. These findings will enable risk stratification and inform management decisions for patients with PsO, PsA and axSpA during COVID-19 waves or similar future respiratory pandemics.
Collapse
Affiliation(s)
- Pedro M Machado
- Centre for Rheumatology & Department of Neuromuscular Diseases, University College London, London, UK .,National Institute for Health Research (NIHR) University College London Hospitals (UCLH) Biomedical Research Centre, University College London Hospitals NHS Foundation Trust, London, UK.,Rheumatology, Northwick Park Hospital, London North West University Healthcare NHS Trust, London, UK
| | - Martin Schäfer
- Epidemiology and Health Services Research, German Rheumatism Research Center (DRFZ Berlin), Berlin, Germany
| | - Satveer K Mahil
- St John's Institute of Dermatology, Guy's and St Thomas' NHS Foundation Trust and King's College London, London, UK
| | - Jean Liew
- Section of Rheumatology, Department of Medicine, Boston University School of Medicine, Boston, Massachusetts, USA
| | - Laure Gossec
- INSERM, Institut Pierre Louis d'Epidémiologie et de Santé Publique, Sorbonne Universite, Paris, France.,AP-HP, Rheumatology Department, Hopital Universitaire Pitie Salpetriere, Paris, France
| | - Nick Dand
- Department of Medical and Molecular Genetics, School of Basic and Medical Biosciences, Faculty of Life Sciences and Medicine, King's College London, London, UK
| | - Alexander Pfeil
- Department of Internal Medicine III, Jena University Hospital - Friedrich Schiller University, Jena, Germany
| | - Anja Strangfeld
- Epidemiology and Health Services Research, German Rheumatism Research Center (DRFZ Berlin), Berlin, Germany.,Rheumatology and Clinical Immunology, Charité University Medicine, Berlin, Germany
| | - Anne Constanze Regierer
- Epidemiology and Health Services Research, German Rheumatism Research Center Berlin, Berlin, Germany
| | - Bruno Fautrel
- Rheumatology, Pitié-Salpêtrière hospital, AP - HP, Paris, France
| | | | - Carla G S Saad
- Rheumatology Division, Faculdade de Medicina da Universidade de São Paulo (FMUSP), São Paulo, Brazil
| | - Christopher E M Griffiths
- Dermatology Centre, Salford Royal NHS Foundation Trust, Manchester, UK.,National Institute of Health Research Manchester Biomedical Research Centre, Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester, UK
| | - Claudia Lomater
- Academic Rheumatology Centre, Università degli Studi di Torino, Torino, Italy
| | - Corinne Miceli-Richard
- Assistance Publique, Hôpital Cochin, Hôpitaux de Paris & Université de Paris, Paris, France.,Unité Mixte AP-HP/ Institut Pasteur, Institut Pasteur, Paris, France
| | - Daniel Wendling
- Rheumatology, Franche-Comté University and University Teaching Hospital (CHRU), Besançon, France
| | | | - Dieter Wiek
- People with Arthritis and Rheumatism (PARE), EULAR, Zurich, Switzerland
| | - Elsa F Mateus
- Portuguese League Against Rheumatic Diseases (LPCDR), Lisbon, Portugal.,European Alliance of Associations for Rheumatology (EULAR), Kilchberg, Switzerland
| | - Emily Sirotich
- Yale School of Medicine, Yale University, New Haven, Connecticut, USA.,Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, Ontario, Canada.,Canadian Arthritis Patient Alliance, Toronto, Ontario, Canada
| | - Enrique R Soriano
- Rheumatology Unit, Internal Medicine Service, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina.,Instituto Universitario Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
| | - Francinne Machado Ribeiro
- Rheumatology, Hospital Universitário Pedro Ernesto, Universidade do Estado do Rio de Janeiro (UERJ), Rio de Janeiro, Brazil
| | - Felipe Omura
- Clínica Omura Medicina Diagnóstica, São Paulo, Brazil
| | | | - Helena Santos
- Instituto Português de Reumatologia, Lisbon, Portugal.,EpiDoC Unit, CEDOC, Nova Medical School, Lisbon, Portugal
| | - Jonathan Dau
- University of Colorado School of Medicine, Denver, Colorado, USA
| | - Jonathan N Barker
- St John's Institute of Dermatology, School of Basic & Medical Biosciences, Faculty of Life Sciences & Medicine, King's College London, London, UK
| | - Jonathan Hausmann
- Program in Rheumatology, Boston Children's Hospital, Boston, Massachusetts, USA.,Division of Rheumatology, Allergy, and Immunology, Massachusetts General Hospital, Boston, Massachusetts, USA
| | - Kimme L Hyrich
- National Institute of Health Research Manchester Biomedical Research Centre, Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester, UK.,Centre for Epidemiology Versus Arthritis, The University of Manchester, Manchester Academic Health Science Centre, Manchester, UK
| | - Lianne Gensler
- University of California, San Francisco, California, USA
| | - Ligia Silva
- Rheumatology, Centro Hospitalar de Trás-os-montes e Alto Douro (CHTMAD), Vila Real, Portugal
| | - Lindsay Jacobsohn
- Division of Rheumatology, Department of Medicine, University of California, San Francisco, California, USA
| | - Loreto Carmona
- Instituto de Salud Musculoesquelética (INMUSC), Madrid, Spain
| | - Marcelo M Pinheiro
- Rheumatology, Hospital São Paulo, Universidade Federal de São Paulo (UNIFESP), São Paulo, Brazil
| | | | - María de Los Ángeles Severina
- Centro Privado de Medicina Nuclear and Clinica Villa Dalcar, Córdoba, Argentina.,Clinica Villa Dalcar, Río Cuarto, Córdoba, Argentina
| | - Mark Yates
- Centre for Rheumatic Diseases, King's College London, London, UK
| | - Maureen Dubreuil
- Boston University School of Medicine, Boston, Massachusetts, USA
| | | | | | - Nigil Haroon
- Rheumatology, University Health Network, Toronto, Ontario, Canada.,Senior Scientist, Schroder Arthritis Institute, University of Toronto, Toronto, Ontario, Canada
| | - Paul Sufka
- Healthpartners, St. Paul, Minnesota, USA
| | - Rebecca Grainger
- Department of Medicine, University of Otago Wellington, Wellington, New Zealand
| | - Rebecca Hasseli
- Department of Internal Medicine II, University Hospitals Giessen, Giessen, Germany.,Justus Liebig University Giessen, Giessen, Germany
| | - Saskia Lawson-Tovey
- National Institute of Health Research Manchester Biomedical Research Centre, Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester, UK.,Centre for Genetics and Genomics Versus Arthritis, Centre for Musculoskeletal Research, The University of Manchester, Manchester, UK
| | | | - Thao Pham
- Rheumatology, Aix-Marseille-University, Marseille, France.,Rheumatology, APHM, Marseille, France
| | - Tor Olofsson
- Rheumatology, Department of Clinical Sciences Lund, Lund University, Lund, Sweden.,Rheumatology, Skåne University Hospital, Lund, Sweden
| | - Wilson Bautista-Molano
- Rheumatology Division, University Hospital Fundación Santa Fé de Bogotá, Bogota, Colombia.,School of Medicine, Universidad El Bosque, Bogotá, Colombia
| | - Zachary S Wallace
- Clinical Epidemiology Program, Division of Rheumatology, Allergy, and Immunology, Massachusetts General Hospital, Boston, Massachusetts, USA.,Harvard Medical School, Boston, Massachusetts, USA
| | - Zenas Z N Yiu
- National Institute of Health Research Manchester Biomedical Research Centre, Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester, UK.,Dermatology Centre, Salford Royal NHS Foundation Trust, The University of Manchester, Manchester, UK
| | - Jinoos Yazdany
- Division of Rheumatology, Department of Medicine, University of California, San Francisco, California, USA
| | - Philip C Robinson
- School of Clinical Medicine, University of Queensland, Herston, Queensland, Australia.,Rheumatology, Royal Brisbane and Woman's Hospital, Metro North Hospital & Health Service, Herston, Queensland, Australia
| | - Catherine H Smith
- St John's Institute of Dermatology, Guy's and St Thomas' NHS Foundation Trust and King's College London, London, UK
| |
Collapse
|
3
|
Carvalho JS, dos Reis Neto ET, Kakehasi AM, Ribeiro SLE, Studart SAS, Martins FP, Cavalheiro do Espírito Santo R, Ranzolin A, Fernandino DC, Dinis VG, Sato EI, Resende GG, Marinho A, Mariz HA, Sacilotto NC, Ribeiro FM, Shinjo SK, Dias LH, Yazbek MA, Omura F, Rached THS, Gomides APM, Marques CDL, Pillegi GCS, Mota LMH, Pinheiro MM, Monticielo OA, Xavier RM, Ferreira GA. Factors associated with poor outcomes in SLE patients with COVID-19: Data from ReumaCoV-Brazil register. Lupus 2022; 32:42-53. [PMID: 36300790 PMCID: PMC9614598 DOI: 10.1177/09612033221135884] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
OBJECTIVES To evaluate factors associated with COVID-19 severity outcomes in patients with systemic lupus erythematosus (SLE). METHODS This was a cross-sectional analysis of baseline data of a prospective, multi-stage cohort study-"The ReumaCoV Brazil"-designed to monitor patients with immune-mediated rheumatologic disease (IMRD) during the SARS-CoV-2 pandemic. SLE adult patients with COVID-19 were compared with those without COVID-19. SLE activity was evaluated by the patient global assessment (PGA) and SLE Disease Activity Index 2000 (SLEDAI-2K). RESULTS 604 SLE patients were included, 317 (52.4%) with COVID-19 and 287 (47.6%) in the control group. SLE COVID-19 patients reported a lower frequency of social isolation and worked more frequently as health professionals. There was no difference in the mean SLEDAI-2K score between groups in the post-COVID-19 period (5.8 [8.6] vs. 4.5 [8.0]; p = 0.190). However, infected patients reported increased SLE activity according to the Patient Global Assessment (PGA) during this period (2.9 [2.9] vs. 2.3 [2.6]; p = 0.031. Arterial hypertension (OR 2.48 [CI 95% 1.04-5.91], p = 0.041), cyclophosphamide (OR 14.32 [CI 95% 2.12-96.77], p = 0.006), dyspnea (OR: 7.10 [CI 95% 3.10-16.23], p < 0.001) and discontinuation of SLE treatment medication during infection (5.38 [CI 95% 1.97-15.48], p = 0.002), were independently associated with a higher chance of hospitalization related to COVID-19. Patients who received telemedicine support presented a 67% lower chance of hospitalization (OR 0.33 [CI 95% 0.12-0.88], p = 0.02). CONCLUSION Hypertension and cyclophosphamide were associated with a severe outcome, and telemedicine can be a useful tool for SLE patients with COVID-19.
Collapse
Affiliation(s)
- Joana S Carvalho
- Programa de Pós-graduação em Ciências Aplicadas a Saúde do Adulto, Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil,Joana S Carvalho, Programa de Pós-graduação em Ciências Aplicadas à Saúde do Adulto, Faculdade de Medicina, Universidade Federal de Minas Gerais, Alfredo Balena avenue, 190. Belo Horizonte-MG 13130-100, Brazil.
| | | | - Adriana M Kakehasi
- Programa de Pós-graduação em Ciências Aplicadas a Saúde do Adulto, Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Sandra LE Ribeiro
- Faculdade de Medicina da Universidade Federal do Amazonas, Manaus, Brazil
| | | | - Francielle P Martins
- Programa de Pós-graduação em Ciências Médicas, Faculdade de Medicina, Universidade de Brasília, Brasília, Brazil
| | - Rafaela Cavalheiro do Espírito Santo
- Hospital de Clínicas de Porto Alegre, Serviço de Reumatologia, Universidade Federal do Rio Grande do Sul, Programa de Pós-graduação em Ciências Médicas, Faculdade de Medicina, Porto Alegre, Brazil
| | | | - Diana C Fernandino
- Hospital Universitário, Universidade Federal de Juiz de Fora, Juiz de Fora, Minas Gerais, Brazil
| | | | - Emília I Sato
- Hospital São Paulo, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Gustavo G Resende
- Programa de Pós-graduação em Ciências Aplicadas a Saúde do Adulto, Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | | | - Henrique A Mariz
- Hospital das Clínicas, Universidade Federal de Pernambuco, Recife, Brazil
| | - Nathália C Sacilotto
- Instituto de Assistência Médica ao Servidor Público Estadual de S. Paulo, São Paulo, Brazil
| | - Francinne M Ribeiro
- Hospital Universitário Pedro Ernesto, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Samuel K Shinjo
- Faculdade de Medicina FMUSP, Universidade de São Paulo, São Paulo, Brazil
| | - Laiza H Dias
- Hospital Universitário Cassiano Antônio Moraes, Universidade Federal do Espírito Santo, Vitória, Brazil
| | - Michel A Yazbek
- Hospital de Clínicas, Universidade Estadual de Campinas, Campinas, Brazil
| | - Felipe Omura
- Clínica Omura Medicina Diagnóstica, São Paulo, Brazil
| | - Thiago HS Rached
- Instituto de Medicina Integral Professor Fernando Figueira, Recife, Brazil
| | | | - Claudia DL Marques
- Hospital das Clínicas, Universidade Federal de Pernambuco, Recife, Brazil
| | | | - Lícia MH Mota
- Programa de Pós-graduação em Ciências Médicas, Faculdade de Medicina, Universidade de Brasília, Brasília, Brazil
| | - Marcelo M Pinheiro
- Hospital São Paulo, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Odirlei A Monticielo
- Hospital de Clínicas de Porto Alegre, Serviço de Reumatologia, Universidade Federal do Rio Grande do Sul, Programa de Pós-graduação em Ciências Médicas, Faculdade de Medicina, Porto Alegre, Brazil
| | - Ricardo M Xavier
- Hospital de Clínicas de Porto Alegre, Serviço de Reumatologia, Universidade Federal do Rio Grande do Sul, Programa de Pós-graduação em Ciências Médicas, Faculdade de Medicina, Porto Alegre, Brazil
| | - Gilda A Ferreira
- Programa de Pós-graduação em Ciências Aplicadas a Saúde do Adulto, Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | | |
Collapse
|
4
|
Machado PM, Schaefer M, Mahil S, Dand N, Gianfrancesco M, Lawson-Tovey S, Yiu Z, Yates M, Hyrich K, Gossec L, Carmona L, Mateus E, Wiek D, Bhana S, Gore-Massy M, Grainger R, Hausmann J, Sufka P, Sirotich E, Wallace Z, Olofsson T, Lomater C, Romeo N, Wendling D, Pham T, Miceli Richard C, Fautrel B, Silva L, Santos H, Martins FR, Hasseli R, Pfeil A, Regierer A, Isnardi C, Soriano E, Quintana R, Omura F, Machado Ribeiro F, Pinheiro M, Bautista-Molano W, Alpizar-Rodriguez D, Saad C, Dubreuil M, Haroon N, Gensler LS, Dau J, Jacobsohn L, Liew J, Strangfeld A, Barker J, Griffiths CEM, Robinson P, Yazdany J, Smith C. OP0249 CHARACTERISTICS ASSOCIATED WITH POOR COVID-19 OUTCOMES IN PEOPLE WITH PSORIASIS AND SPONDYLOARTHRITIS: DATA FROM THE COVID-19 PsoProtect AND GLOBAL RHEUMATOLOGY ALLIANCE PHYSICIAN-REPORTED REGISTRIES. Ann Rheum Dis 2022. [DOI: 10.1136/annrheumdis-2022-eular.1753] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BackgroundSome factors associated with severe COVID-19 outcomes have been identified in patients with psoriasis (PsO) and inflammatory/autoimmune rheumatic diseases, namely older age, male sex, comorbidity burden, higher disease activity, and certain medications such as rituximab. However, information about specificities of patients with PsO, psoriatic arthritis (PsA) and axial spondyloarthritis (axSpA), including disease modifying anti-rheumatic drugs (DMARDs) specifically licensed for these conditions, such as IL-17 inhibitors (IL-17i), IL-23/IL-12 + 23 inhibitors (IL-23/IL-12 + 23i), and apremilast, is lacking.ObjectivesTo determine characteristics associated with severe COVID-19 outcomes in people with PsO, PsA and axSpA.MethodsThis study was a pooled analysis of data from two physician-reported registries: the Psoriasis Patient Registry for Outcomes, Therapy and Epidemiology of COVID-19 Infection (PsoProtect), comprising patients with PsO/PsA, and the COVID-19 Global Rheumatology Alliance (GRA) registry, comprising patients with PsA/axSpA. Data from the beginning of the pandemic up to 25 October, 2021 were included. An ordinal severity outcome was defined as: 1) not hospitalised, 2) hospitalised without death, and 3) death. A multivariable ordinal logistic regression model was constructed to assess the relationship between COVID-19 severity and demographic characteristics (age, sex, time period of infection), comorbidities (hypertension, other cardiovascular disease [CVD], chronic obstructive lung disease [COPD], asthma, other chronic lung disease, chronic kidney disease, cancer, smoking, obesity, diabetes mellitus [DM]), rheumatic/skin disease (PsO, PsA, axSpA), physician-reported disease activity, and medication exposure (methotrexate, leflunomide, sulfasalazine, TNFi, IL17i, IL-23/IL-12 + 23i, Janus kinase inhibitors (JAKi), apremilast, glucocorticoids [GC] and NSAIDs). Age-adjustment was performed employing four-knot restricted cubic splines. Country-adjustment was performed using random effects.ResultsA total of 5008 individuals with PsO (n=921), PsA (n=2263) and axSpA (n=1824) were included. Mean age was 50 years (SD 13.5) and 51.8% were male. Hospitalisation (without death) was observed in 14.6% of cases and 1.8% died. In the multivariable model, the following variables were associated with severe COVID-19 outcomes: older age (Figure 1), male sex (OR 1.53, 95%CI 1.29-1.82), CVD (hypertension alone: 1.26, 1.02-1.56; other CVD alone: 1.89, 1.22-2.94; vs no hypertension and no other CVD), COPD or asthma (1.75, 1.32-2.32), other lung disease (2.56, 1.66-3.97), chronic kidney disease (2.32, 1.50-3.59), obesity and DM (obesity alone: 1.36, 1.07-1.71; DM alone: 1.85, 1.39-2.47; obesity and DM: 1.89, 1.34-2.67; vs no obesity and no DM), higher disease activity and GC intake (remission/low disease activity and GC intake: 1.96, 1.36-2.82; moderate/severe disease activity and no GC intake: 1.35, 1.05-1.72; moderate/severe disease activity and GC intake 2.30, 1.41-3.74; vs remission/low disease activity and no GC intake). Conversely, the following variables were associated with less severe COVID-19 outcomes: time period after 15 June 2020 (16 June 2020-31 December 2020: 0.42, 0.34-0.51; 1 January 2021 onwards: 0.52, 0.41-0.67; vs time period until 15 June 2020), a diagnosis of PsO (without arthritis) (0.49, 0.37-0.65; vs PsA), and exposure to TNFi (0.58, 0.45-0.75; vs no DMARDs), IL17i (0.63, 0.45-0.88; vs no DMARDs), IL-23/IL-12 + 23i (0.68, 0.46-0.997; vs no DMARDs) and NSAIDs (0.77, 0.60-0.98; vs no NSAIDs).ConclusionMore severe COVID-19 outcomes in PsO, PsA and axSpA are largely driven by demographic factors (age, sex), comorbidities, and active disease. None of the DMARDs typically used in PsO, PsA and axSpA, were associated with severe COVID-19 outcomes, including IL-17i, IL-23/IL-12 + 23i, JAKi and apremilast.AcknowledgementsWe thank all the contributors to the COVID-19 PsoProtect, GRA and EULAR Registries.Disclosure of InterestsNone declared
Collapse
|
5
|
Gomides APM, de Albuquerque CP, da Mota LMH, Devidé G, Dias LH, Duarte ALBP, Giovelli RA, Karnopp TE, de Lima HD, Marinho A, de Oliveira MS, Omura F, Ranzolin A, Resende G, Ribeiro FM, Ribeiro SLE, de Carvalho Sacilotto N, Dos Santos WG, Shinjo SK, de Sousa Studart SA, Teixeira FPS, Yazbek MA, Ferreira GA, Monticielo OA, Paiva E, Pileggi GCS, Dos Reis-Neto ET, de Medeiros Pinheiro M, Marques CDL. Factors associated with hospitalizations for Covid-19 in patients with rheumatoid arthritis: data from the Reumacov Brazil registry. Adv Rheumatol 2022; 62:13. [PMID: 35505408 PMCID: PMC9062867 DOI: 10.1186/s42358-022-00244-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Accepted: 04/10/2022] [Indexed: 12/02/2022] Open
Abstract
Background Patients using immunosuppressive drugs may have unfavorable results after infections. However, there is a lack of information regarding COVID-19 in these patients, especially in patients with rheumatoid arthritis (RA). Therefore, the aim of this study was to evaluate the risk factors associated with COVID-19 hospitalizations in patients with RA. Methods This multicenter, prospective cohort study is within the ReumaCoV Brazil registry and included 489 patients with RA. In this context, 269 patients who tested positive for COVID-19 were compared to 220 patients who tested negative for COVID-19 (control group). All patient data were collected from the Research Electronic Data Capture database. Results The participants were predominantly female (90.6%) with a mean age of 53 ± 12 years. Of the patients with COVID-19, 54 (20.1%) required hospitalization. After multiple adjustments, the final regression model showed that heart disease (OR = 4.61, 95% CI 1.06–20.02. P < 0.001) and current use of glucocorticoids (OR = 20.66, 95% CI 3.09–138. P < 0.002) were the risk factors associated with hospitalization. In addition, anosmia was associated with a lower chance of hospitalization (OR = 0.26; 95% CI 0.10–0.67, P < 0.005). Conclusion Our results demonstrated that heart disease and the use of glucocorticoids were associated with a higher number of hospital admissions for COVID-19 in patients with RA. Trial registration: Brazilian Registry of Clinical Trials - RBR-33YTQC. Supplementary Information The online version contains supplementary material available at 10.1186/s42358-022-00244-5.
Collapse
Affiliation(s)
| | | | | | - Guilherme Devidé
- Faculdade de Ciências da Educação e Saúde, Centro Universitário de Brasília, Brasília, Brazil
| | - Laiza Hombre Dias
- Faculdade de Ciências da Educação e Saúde, Centro Universitário de Brasília, Brasília, Brazil
| | | | - Raquel Altoé Giovelli
- Faculdade de Ciências da Educação e Saúde, Centro Universitário de Brasília, Brasília, Brazil
| | - Thais Evelyn Karnopp
- Faculdade de Ciências da Educação e Saúde, Centro Universitário de Brasília, Brasília, Brazil
| | - Hugo Deleon de Lima
- Faculdade de Ciências da Educação e Saúde, Centro Universitário de Brasília, Brasília, Brazil
| | - Adriana Marinho
- Faculdade de Ciências da Educação e Saúde, Centro Universitário de Brasília, Brasília, Brazil
| | | | - Felipe Omura
- Faculdade de Ciências da Educação e Saúde, Centro Universitário de Brasília, Brasília, Brazil
| | - Aline Ranzolin
- Faculdade de Ciências da Educação e Saúde, Centro Universitário de Brasília, Brasília, Brazil
| | - Gustavo Resende
- Faculdade de Ciências da Educação e Saúde, Centro Universitário de Brasília, Brasília, Brazil
| | | | | | | | | | - Samuel Katsuyuki Shinjo
- Faculdade de Ciências da Educação e Saúde, Centro Universitário de Brasília, Brasília, Brazil
| | | | | | - Michel Alexandre Yazbek
- Faculdade de Ciências da Educação e Saúde, Centro Universitário de Brasília, Brasília, Brazil
| | | | - Odirlei A Monticielo
- Faculdade de Ciências da Educação e Saúde, Centro Universitário de Brasília, Brasília, Brazil
| | - Eduardo Paiva
- Faculdade de Ciências da Educação e Saúde, Centro Universitário de Brasília, Brasília, Brazil
| | | | | | | | - Claudia D L Marques
- Faculdade de Ciências da Educação e Saúde, Centro Universitário de Brasília, Brasília, Brazil
| | | |
Collapse
|
6
|
Marques CDL, Ribeiro SLE, Albuquerque CP, de Sousa Studart SA, Ranzolin A, de Andrade NPB, Dantas AT, Mota GD, Resende GG, Marinho AO, Angelieri D, Andrade D, Ribeiro FM, Omura F, Silva NA, Rocha Junior L, Brito DE, Fernandino DC, Yazbek MA, Souza MPG, Ximenes AC, Martins ASS, Castro GRW, Oliveira LC, Freitas ABSB, Kakehasi AM, Gomides APM, Reis Neto ET, Pileggi GS, Ferreira GA, Mota LMH, Xavier RM, de Medeiros Pinheiro M. COVID-19 was not associated or trigger disease activity in spondylarthritis patients: ReumaCoV-Brasil cross-sectional data. Adv Rheumatol 2022; 62:45. [PMID: 36419163 PMCID: PMC9685130 DOI: 10.1186/s42358-022-00268-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Accepted: 09/27/2022] [Indexed: 11/24/2022] Open
Abstract
OBJECTIVES To evaluate the disease activity before and after COVID-19 and risk factors associated with outcomes, including hospitalization, intensive care unit (ICU) admission, mechanical ventilation (MV) and death in patients with spondylarthritis (SpA). METHODS ReumaCoV Brazil is a multicenter prospective cohort of immune-mediated rheumatic diseases (IMRD) patients with COVID-19 (case group), compared to a control group of IMRD patients without COVID-19. SpA patients enrolled were grouped as axial SpA (axSpA), psoriatic arthritis (PsA) and enteropathic arthritis, according to usual classification criteria. RESULTS 353 SpA patients were included, of whom 229 (64.9%) were axSpA, 118 (33.4%) PsA and 6 enteropathic arthritis (1.7%). No significant difference was observed in disease activity before the study inclusion comparing cases and controls, as well no worsening of disease activity after COVID-19. The risk factors associated with hospitalization were age over 60 years (OR = 3.71; 95% CI 1.62-8.47, p = 0.001); one or more comorbidities (OR = 2.28; 95% CI 1.02-5.08, p = 0.001) and leflunomide treatment (OR = 4.46; 95% CI 1.33-24.9, p = 0.008). Not having comorbidities (OR = 0.11; 95% CI 0.02-0.50, p = 0.001) played a protective role for hospitalization. In multivariate analysis, leflunomide treatment (OR = 8.69; CI = 95% 1.41-53.64; p = 0.023) was associated with hospitalization; teleconsultation (OR = 0.14; CI = 95% 0.03-0.71; p = 0.01) and no comorbidities (OR = 0.14; CI = 95% 0.02-0.76; p = 0.02) remained at final model as protective factor. CONCLUSIONS Our results showed no association between pre-COVID disease activity or that SARS-CoV-2 infection could trigger disease activity in patients with SpA. Teleconsultation and no comorbidities were associated with a lower hospitalization risk. Leflunomide remained significantly associated with higher risk of hospitalization after multiple adjustments.
Collapse
Affiliation(s)
| | | | | | | | | | - Nicole Pamplona Bueno de Andrade
- grid.8532.c0000 0001 2200 7498Hospital de Clínicas de Porto Alegre – Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Andrea T. Dantas
- grid.411227.30000 0001 0670 7996Hospital das Clínicas – Universidade Federal de Pernambuco, Recife, Brazil
| | - Guilherme D. Mota
- grid.411249.b0000 0001 0514 7202Universidade Federal de São Paulo, Rua Borges Lagoa, 913/ 51-53, Vila Clementino, São Paulo, SP CEP: 04038-034 Brazil
| | - Gustavo G. Resende
- grid.8430.f0000 0001 2181 4888Hospital das Clínicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | | | - Danielle Angelieri
- grid.414644.70000 0004 0411 4654Hospital dos Servidores de São Paulo – IAMSPE, São Paulo, Brazil
| | - Danieli Andrade
- grid.11899.380000 0004 1937 0722Hospital das Clínicas, Universidade de São Paulo, São Paulo, Brazil
| | - Francinne M. Ribeiro
- grid.412211.50000 0004 4687 5267Hospital Universitário Pedro Ernesto, Universidade do Estado do Rio de Janeiro, Abraão, Brazil
| | - Felipe Omura
- Clínica Omura Medicina Diagnóstica, São Paulo, Brazil
| | - Nilzio A. Silva
- grid.411195.90000 0001 2192 5801Faculdade de Medicina da Universidade Federal de Goiás, Goiânia, Brazil
| | - Laurindo Rocha Junior
- grid.419095.00000 0004 0417 6556Instituto de Medicina Integral Professor Fernando Figueira -IMIP, Recife, Brazil
| | - Danielle E. Brito
- grid.411216.10000 0004 0397 5145Universidade Federal da Paraíba, João Pessoa, Brazil
| | - Diana C. Fernandino
- grid.411198.40000 0001 2170 9332Universidade Federal de Juiz de Fora, Juiz de Fora, Brazil
| | - Michel A. Yazbek
- grid.411087.b0000 0001 0723 2494Hospital de Clínicas da Universidade Estadual de Campinas- UNICAMP, Campinas, Brazil
| | - Mariana P. G. Souza
- grid.415169.e0000 0001 2198 9354Santa Casa de Belo Horizonte, Belo Horizonte, Brazil
| | | | - Ana Silvia S. Martins
- grid.411284.a0000 0004 4647 6936Hospital de Clínicas, Universidade Federal de Uberlândia, Uberlândia, Brazil
| | - Glaucio Ricardo W. Castro
- grid.413214.10000 0004 0504 2293Hospital Governador Celso Ramos – Santa Catarina, Florianópolis, Brazil
| | | | | | - Adriana M. Kakehasi
- grid.8430.f0000 0001 2181 4888Hospital das Clínicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | | | - Edgard Torres Reis Neto
- grid.411249.b0000 0001 0514 7202Universidade Federal de São Paulo, Rua Borges Lagoa, 913/ 51-53, Vila Clementino, São Paulo, SP CEP: 04038-034 Brazil
| | - Gecilmara S. Pileggi
- grid.411249.b0000 0001 0514 7202Universidade Federal de São Paulo, Rua Borges Lagoa, 913/ 51-53, Vila Clementino, São Paulo, SP CEP: 04038-034 Brazil
| | - Gilda A. Ferreira
- grid.8430.f0000 0001 2181 4888Hospital das Clínicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Licia Maria H. Mota
- grid.7632.00000 0001 2238 5157Programa de Pós-Graduação em Ciências Médicas, Faculdade de Medicina, Universidade de Brasília (PPGCM-FM-UnB), Brazil, Brasília, DF Brazil ,grid.411215.2Hospital Universitário de Brasília (HUB-UnB-EBSERH), Brasília, DF Brazil
| | - Ricardo M. Xavier
- grid.8532.c0000 0001 2200 7498Hospital de Clínicas de Porto Alegre – Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Marcelo de Medeiros Pinheiro
- grid.411249.b0000 0001 0514 7202Universidade Federal de São Paulo, Rua Borges Lagoa, 913/ 51-53, Vila Clementino, São Paulo, SP CEP: 04038-034 Brazil
| | | |
Collapse
|
7
|
Azuma M, Dat Le T, Yoshimoto Y, Hiraki N, Yamanaka M, Omura F, Inoue YH. RNA-seq analysis of diet-driven obesity and anti-obesity effects of quercetin glucoside or epigallocatechin gallate in Drosophila adults. Eur Rev Med Pharmacol Sci 2019; 23:857-876. [PMID: 30720195 DOI: 10.26355/eurrev_201901_16901] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE High-fat diet (HFD) feeding stimulates fat accumulation in mammals and Drosophila. In the present study, we examined whether simultaneous feeding of familiar anti-obesity drugs, quercetin glycosides (QG) and epigallocatechin gallate (EGCG), to Drosophila has the same suppressive effect on fat accumulation as previously reported in rats and mice. To understand the underlying molecular mechanisms of HFD diet-induced obesity and the suppression effect of the drugs, we performed transcriptome analyses. MATERIALS AND METHODS We induced extra fat accumulation by feeding Drosophila fly food containing 20% coconut oil and quantified the triglyceride accumulated in flies. The effects of anti-obesity drugs were also evaluated. We isolated total RNA from each sample and performed RNA-seq analyses and quantitive Real Time-Polymerase Chain Reaction (qRT-PCR) to investigate altered gene expression. RESULTS The mRNA levels of several genes involved in lipid metabolism, glycolysis/gluconeogenesis, and anti-oxidative stress changed in HFD-fed adults. Moreover, the levels altered in those fed an HFD with QG or EGCG. The qRT-PCR further confirmed the RNA-seq data, suggesting that the expression of five essential genes for lipid metabolism changed in HFD-fed flies and altered in the flies treated with anti-obesity drugs. The most remarkable alteration was observed in the dHSL gene encoding a lipase involved in lipid-storage after HFD feeding and HFD with QG or EGCG. These alterations are consistent with HFD-induced fat accumulation as well as the anti-obesity effects of the drugs in mammals, suggesting that the genes play an important role in anti-obesity effects. CONCLUSIONS These are the first reports to date of entire profiles of altered gene expression under the conditions of diet-induced obesity and its suppression by anti-obesity drugs in Drosophila.
Collapse
Affiliation(s)
- M Azuma
- Insect Biomedical Research Center, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto, Japan.
| | | | | | | | | | | | | |
Collapse
|
8
|
Pinheiro MM, Reis Neto ET, Machado FS, Omura F, Szejnfeld J, Szejnfeld VL. Development and validation of a tool for identifying women with low bone mineral density and low-impact fractures: the São Paulo Osteoporosis Risk Index (SAPORI). Osteoporos Int 2012; 23:1371-9. [PMID: 21769663 DOI: 10.1007/s00198-011-1722-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/12/2011] [Accepted: 05/12/2011] [Indexed: 12/31/2022]
Abstract
UNLABELLED The performance of the São Paulo Osteoporosis Risk Index (SAPORI) was tested in 1,915 women from the original cohort, São Paulo Osteoporosis Study (SAPOS) (N = 4332). This new tool was able to identify women with low bone density (spine and hip) and low-impact fracture, with an area under the receiving operator curve (ROC) of 0.831, 0.724, and 0.689, respectively. INTRODUCTION A number of studies have demonstrated the clinical relevance of risk factors for identifying individuals at risk of fracture (Fx) and osteoporosis (OP). The SAPOS is an epidemiological study for the assessment of risk factors for Fx and low bone density in women from the community of the metropolitan area of São Paulo, Brazil. The aim of the present study was to develop and validate a tool for identifying women at higher risk for OP and low-impact Fx. METHODS A total of 4,332 pre-, peri-, and postmenopausal women were analyzed through a questionnaire addressing risk factors for OP and Fx. All of them performed bone densitometry at the lumbar spine and proximal femur (DPX NT, GE-Lunar). Following the identification of the main risk factors for OP and Fx through multivariate and logistic regression, respectively, the SAPORI was designed and subsequently validated on a second cohort of 1,915 women from the metropolitan community of São Paulo. The performance of this tool was assessed through ROC analysis. RESULTS The main and significant risk factors associated with low bone density and low-impact Fx were low body weight, advanced age, Caucasian ethnicity, family history of hip Fx, current smoking, and chronic use of glucocorticosteroids. Hormonal replacement therapy and regular physical activity in the previous year played a protective role (p < 0.05). After the statistical adjustments, the SAPORI was able to identify women with low bone density (T-score ≤ -2 standard deviations) in the femur, with 91.4% sensitivity, 52% specificity, and an area under the ROC of 0.831 (p < 0.001). At the lumbar spine, the performance was similar (81.5% sensitivity, 50% specificity, and area under ROC of 0.724; p < 0.001). Regarding the identification of low-impact Fx, the sensitivity was 71%, the specificity was 52%, and the area under the ROC was 0.689 (p < 0.001). CONCLUSION The SAPORI is a simple, useful, fast, practice, and valid tool for identifying women at higher risk for low bone density and osteoporotic fractures.
Collapse
Affiliation(s)
- M M Pinheiro
- Rheumatology Division, Universidade Federal de São Paulo/Escola Paulista de Medicina (Unifesp/EPM), São Paulo, Brazil.
| | | | | | | | | | | |
Collapse
|
9
|
Pinheiro MM, Reis Neto ETD, Machado FS, Omura F, Yang JHK, Szejnfeld J, Szejnfeld VL. Risk factors for osteoporotic fractures and low bone density in pre and postmenopausal women. Rev Saude Publica 2010; 44:479-85. [PMID: 20549019 DOI: 10.1590/s0034-89102010000300011] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2009] [Accepted: 04/12/2009] [Indexed: 11/22/2022] Open
Abstract
OBJECTIVE To estimate the prevalence and analyze risk factors associated to osteoporosis and low-trauma fracture in women. METHODS Cross-sectional study including a total of 4,332 women older than 40 attending primary care services in the Greater São Paulo, Southeastern Brazil, between 2004 and 2007. Anthropometrical and gynecological data and information about lifestyle habits, previous fracture, medical history, food intake and physical activity were obtained through individual quantitative interviews. Low-trauma fracture was defined as that resulting from a fall from standing height or less in individuals 50 years or older. Multiple logistic regression models were designed having osteoporotic fracture and bone mineral density (BMD) as the dependent variables and all other parameters as the independent ones. The significance level was set at p<0.05. RESULTS The prevalence of osteoporosis and osteoporotic fractures was 33% and 11.5%, respectively. The main risk factors associated with low bone mass were age (OR=1.07; 95% CI: 1.06;1.08), time since menopause (OR=2.16; 95% CI: 1.49;3.14), previous fracture (OR=2.62; 95% CI: 2.08;3.29) and current smoking (OR=1.45; 95% CI: 1.13;1.85). BMI (OR=0.88; 95% CI: 0.86;0.89), regular physical activity (OR=0.78; 95% CI: 0.65;0.94) and hormone replacement therapy (OR=0.43; 95% CI: 0.33;0.56) had a protective effect on bone mass. Risk factors significantly associated with osteoporotic fractures were age (OR=1.05; 95% CI: 1.04;1.06), time since menopause (OR=4.12; 95% CI: 1.79;9.48), familial history of hip fracture (OR=3.59; 95% CI: 2.88;4.47) and low BMD (OR=2.28; 95% CI: 1.85;2.82). CONCLUSIONS Advanced age, menopause, low-trauma fracture and current smoking are major risk factors associated with low BMD and osteoporotic fracture. The clinical use of these parameters to identify women at higher risk for fractures might be a reasonable strategy to improve the management of osteoporosis.
Collapse
Affiliation(s)
- Marcelo M Pinheiro
- Disciplina de Reumatologia, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brazil.
| | | | | | | | | | | | | |
Collapse
|
10
|
Santos CCD, Omura F, Guimarães HP, Falcão LFDR, Lopes RD, Saes LSV. Perfuração de mucosa esofágica por sonda entérica: relato de caso. Rev Bras Ter Intensiva 2006. [DOI: 10.1590/s0103-507x2006000100017] [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: 11/22/2022] Open
|
11
|
Santos CCD, Omura F, Guimarães HP, Falcão LFDR, Lopes RD, Saes LSV. [Perforation of esofagic mucosa for enteric tube: case report]. Rev Bras Ter Intensiva 2006; 18:104-108. [PMID: 25310335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2005] [Accepted: 12/26/2005] [Indexed: 06/04/2023] Open
Abstract
BACKGROUND AND OBJECTIVES This study is a case report of a patient that was submitted to implant of enteric tube (ET) in the ICU, being evidenced false passage in proximal esophagus during endoscopic procedure, demonstrating tunnel for the submucosa. CASE REPORT A 77 years old woman, transferred to ICU, where ET was installed (due to difficulty of being carried through both nostrils) being confirmed its position through thoraco-abdominal x-ray. The patient remained around 10 days with the ET, receiving diet, without any alteration. In the 10th day she was evolved with melena and reduction of the values of Hb/Ht, without hemodynamic repercussion. Submitted to the high digestive endoscopic that evidenced ulcer injury to bulbar, of about 2.5 cm, with signals of former bleeding. During the examination, a false passage of the ET in proximal esophagus was visualized: 2 cm below of the crico-faring, tunnel for the submucosa possibly for all above-mentioned segments, following its habitual passage until gastric chamber. CONCLUSIONS Patients of high risk for esophagus perforation for ET installation can be identified and well-taken care of adjusted they can be used. If to occur perforation, this must be identified how much so early possible, for adequate treatment. The adequate treatment depends of each case and same the clinical therapy can be appropriate in selected cases.
Collapse
|
12
|
Abstract
The amino acid permease Bap2p in Saccharomyces cerevisiae mediates a major part of the uptake of leucine, isoleucine, and valine from media containing a preferred nitrogen source. Although the transcriptional controls of BAP2 have been well studied, the posttranslational down-regulation mechanisms for Bap2p have not been established. Here we show that Bap2p is subject to a starvation-induced degradation upon rapamycin treatment or cultivation with proline as the sole nitrogen source. The starvation-induced degradation of Bap2p was dependent on the cellular functions of ubiquitination and endocytosis. Down-regulation of the permease required the most probable ubiquitination sites, the lysine residues situated in the N-terminal 49 residues, as well as the C-terminal domain. Furthermore, when the N-terminal domain of Bap2p was fused to the general amino acid permease Gap1p, the resultant chimeric permease became susceptible to the starvation-induced degradation, indicating that the Bap2p N-terminus contains a determinant responsive to the starvation signals.
Collapse
Affiliation(s)
- F Omura
- Institute for Fundamental Research, Suntory Ltd., 1-1-1, Wakayamadai, Shimamoto-cho, Mishima-gun, Osaka, 618-8503, Japan.
| | | | | |
Collapse
|
13
|
Kodama Y, Omura F, Ashikari T. Isolation and characterization of a gene specific to lager brewing yeast that encodes a branched-chain amino acid permease. Appl Environ Microbiol 2001; 67:3455-62. [PMID: 11472919 PMCID: PMC93043 DOI: 10.1128/aem.67.8.3455-3462.2001] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.5] [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: 11/20/2022] Open
Abstract
We found two types of branched-chain amino acid permease gene (BAP2) in the lager brewing yeast Saccharomyces pastorianus BH-225 and cloned one type of BAP2 gene (Lg-BAP2), which is identical to that of Saccharomyces bayanus (by-BAP2-1). The other BAP2 gene of the lager brewing yeast (cer-BAP2) is very similar to the Saccharomyces cerevisiae BAP2 gene. This result substantiates the notion that lager brewing yeast is a hybrid of S. cerevisiae and S. bayanus. The amino acid sequence homology between S. cerevisiae Bap2p and Lg-Bap2p was 88%. The transcription of Lg-BAP2 was not induced by the addition of leucine to the growth medium, while that of cer-BAP2 was induced. The transcription of Lg-BAP2 was repressed by the presence of ethanol and weak organic acid, while that of cer-BAP2 was not affected by these compounds. Furthermore, Northern analysis during beer fermentation revealed that the transcription of Lg-BAP2 was repressed at the beginning of the fermentation, while cer-BAP2 was highly expressed throughout the fermentation. These results suggest that the transcription of Lg-BAP2 is regulated differently from that of cer-BAP2 in lager brewing yeasts.
Collapse
Affiliation(s)
- Y Kodama
- Institute for Fundamental Research, Suntory Research Center, Mishima-gun, Osaka 618-8503, Japan.
| | | | | |
Collapse
|
14
|
Abstract
The branched-chain amino acid permease Bap2p is a transport system for leucine, isoleucine, and valine in Saccharomyces cerevisiae, and its synthesis is regulated transcriptionally. However, the downregulation mechanisms of Bap2p have not been established. Here we demonstrate that the C-terminal region of Bap2p plays a pivotal role in its basal turnover. Truncation of the C-terminal 29 residues caused the stabilization and accumulation in the plasma membrane of Bap2p. Furthermore, when the Bap2p C-terminal region was fused to green fluorescent protein, the fusion protein localized to the plasma membrane, suggesting the existence of a possible degradation-related acceptor site for the C-terminal tail of Bap2p.
Collapse
Affiliation(s)
- F Omura
- Institute for Fundamental Research, Suntory Ltd., 1-1-1, Wakayamadai, Shimamoto-cho, Mishima-gun, 618-8503, Osaka, Japan.
| | | | | |
Collapse
|
15
|
Shimoya S, Makino K, Omura F, Amatsu M. [Proliferative potential of the ear drum in the process of gerbiline cholesteatoma formation]. Nihon Jibiinkoka Gakkai Kaiho 1998; 101:1029-37. [PMID: 9778949 DOI: 10.3950/jibiinkoka.101.8_1029] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Mongolian gerbil frequently develop spontaneous cholesteatoma. As we reported previously, in the process of gerbiline cholesteatoma formation, effusions inside the pars flaccida are always found in the ears during the early stage, and epidermal growth factor (EGF) is also localized in the pars flaccida, especially in the mucous layer. In this study, to clarify the process of gerbiline cholesteatoma formation, we studied 22 gerbiline temporal bones by using a monoclonal antibody against bromodeoxyuridine (BrdU). BrdU-labeled cells demonstrate a proliferative potential. We also used a carbon dye method to label the micro-vase in 14 gerbiline temporal bones. Cells showing BrdU uptake were more abundant, as demonstrated immunohistochemically, in the pars flaccida of ears with early cholesteatomas than in the pars flaccida of normal ears (p < 0.01). The pars flaccida of ears with early cholesteatomas showed hypertrophy of both epithelial layers, and hyperkeratosis of the epidermal layer. BrdU-labeled cells in the pars flaccida were more localized in the mucous layers than in the epidermal layers. In contrast, in ears with cholesteatomas, BrdU-labeled cells were less abudant than in ears with early cholesteatomas. In addition, BrdU-labeled cells in the pars tensa and external auditory epidermal layers were not increased in ears with any stage of cholesteatoma formation. We used a carbon dye method to detect the micro-vasa in the intermediate layer of the ear drum. Carbon-dye-labeled vasa were more numerous in the pars flaccida with early cholesteatomas than in the pars flaccida of normal ears or ears with cholesteatomas. It is highly suspected that angiogenesis was stimulated in the pars flaccida with early cholesteatomas, because stimulation of angiogenesis by EGF has been reported. The above findings suggest that the mucous layer of the pars flaccida has the greatest proliferative potential in the process of cholesteatoma formation. Angiogenesis in the pars flaccida appears to be a reaction to proliferative changes in the mucous and epidermal layers. These changes are probably stimulated by effusion inside the pars flaccida.
Collapse
Affiliation(s)
- S Shimoya
- Department of Otorhinolaryngology, Kobe University School of Medicine
| | | | | | | |
Collapse
|
16
|
Abstract
Transcription of MET genes in Saccharomyces cerevisiae depends on a transcriptional activator, the MET4 gene product (Met4p). Using in vitro mutagenesis, we isolated two mutant MET4 alleles encoding [Pro215]Met4p and [Ser156]Met4p. These mutations impeded Met4p's responsiveness to methionine in the media, and yeast cells carrying mutant alleles exhibited enhanced transcription of MET genes under repressing conditions. The enhanced transcription was dependent on the CBF1 gene, but did not compete with an excess of wild-type Met4p, suggesting that some changes in the affinity of Met4p to other factors might be involved in S-adenosylmethionine-mediated transcriptional regulation.
Collapse
Affiliation(s)
- F Omura
- Institute for Fundamental Research, Suntory Ltd., Osaka, Japan.
| | | | | |
Collapse
|
17
|
Omura F, Makino K, Amatsu M, Itoh H. The role of middle ear effusions and epidermal growth factor in cholesteatoma formation in the gerbilline temporal bone. Eur Arch Otorhinolaryngol 1995; 252:428-32. [PMID: 8562039 DOI: 10.1007/bf00167314] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [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: 01/31/2023]
Abstract
To study the process of aural cholesteatoma formation, we used gerbilline temporal bones to examine histologically the early stages of spontaneous cholesteatomas associated with experimentally induced otitis media with effusion (OME) following electric cauterizations of the eustachian tube. Epidermal growth factor (EGF) was then localized immunohistochemically in the pars flaccida of normal ears and the forming spontaneous cholesteatomas. Findings in the ears with the early spontaneous cholesteatomas were effusion inside the pars flaccida and hypertrophy and hyperkeratosis of the pars flaccida. Findings in the ears with experimental OME involved an effusion in the whole middle ear cavity as well as hypertrophy and hyperkeratosis in both the pars flaccida and pars tensa. The incidence of ear drum changes was higher in the experimental OME group than in control animals without cauterization. EGF was localized in the mucous layer of normal drums, the mucous layer and lamina propria of drums with hypertrophy alone, and all layers in drums with hypertrophy and hyperkeratosis. EGF was especially positive in the cytoplasms of transformed cuboidal cells. These findings suggest that EGF within the transformed mucous layer may play an important role as a biochemical factor in developing cholesteatomas.
Collapse
Affiliation(s)
- F Omura
- Department of Otorhinolaryngology, Kasai Municipal Hospital, Japan
| | | | | | | |
Collapse
|
18
|
Otsu M, Urade R, Kito M, Omura F, Kikuchi M. A possible role of ER-60 protease in the degradation of misfolded proteins in the endoplasmic reticulum. J Biol Chem 1995; 270:14958-61. [PMID: 7797475 DOI: 10.1074/jbc.270.25.14958] [Citation(s) in RCA: 95] [Impact Index Per Article: 3.3] [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: 01/27/2023] Open
Abstract
Wild-type human lysozyme (hLZM) is secreted when expressed in mouse L cells, whereas misfolded mutant hLZMs are retained and eventually degraded in a pre-Golgi compartment (Omura, F., Otsu, M., Yoshimori, T., Tashiro, Y., and Kikuchi, M. (1992) Eur. J. Biochem. 210, 591-599). These misfolded mutant hLZMs are associated with protein disulfide isomerase (Otsu, M., Omura, F., Yoshimori, T., and Kikuchi, M. (1994) J. Biol. Chem. 269, 6874-6877). From the observation that this degradation is sensitive to cysteine protease inhibitors, such as N-acetyl-leucyl-leucyl-norleucinal and N-acetyl-leucyl-leucyl-methioninal, but not to the serine protease inhibitors, 1-chloro-3-tosylamido-7-amino-2-heptanone and (p-amidinophenyl)methanesulfonyl fluoride, it was suggested that some cysteine proteases are likely responsible for the degradation of abnormal proteins in the endoplasmic reticulum (ER). ER-60 protease (ER-60), an ER resident protein with cysteine protease activity (Urade, R., Nasu, M., Moriyama, T., Wada, K., and Kito, M. (1992) J. Biol. Chem. 267, 15152-15159), was found to associate with misfolded hLZMs, but not with the wild-type protein, in mouse L cells. Furthermore, denatured hLZM is degraded by ER-60 in vitro, whereas native hLZM is not. These results suggest that ER-60 could be a component of the proteolytic machinery for the degradation of misfolded mutant hLZMs in the ER.
Collapse
Affiliation(s)
- M Otsu
- Protein Engineering Research Institute, Osaka, Japan
| | | | | | | | | |
Collapse
|
19
|
Otsu M, Omura F, Yoshimori T, Kikuchi M. Protein disulfide isomerase associates with misfolded human lysozyme in vivo. J Biol Chem 1994; 269:6874-7. [PMID: 8120049] [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: 01/28/2023] Open
Abstract
Wild-type human lysozyme (hLZM) is quantitatively secreted into the media when expressed in mouse fibroblast cells, but some misfolded hLZMs are retained and rapidly degraded in a pre-Golgi compartment (Omura, F., Otsu, M., Yoshimori, T., Tashiro, Y., and Kikuchi, M. (1992) Eur. J. Biochem. 210, 591-599). To detect the association with misfolded hLZMs of cellular proteins involved in their folding, retention, and pre-Golgi degradation, a co-precipitation experiment was carried out using anti-hLZM antibody and metabolically labeled cell lysates, which were treated with a membrane-permeable cross-linking reagent. Here we report that protein disulfide isomerase associated in vivo with misfolded hLZMs, but not with the wild-type protein, and discuss the possible role of protein disulfide isomerase in the quality control of newly synthesized proteins in the endoplasmic reticulum.
Collapse
Affiliation(s)
- M Otsu
- Protein Engineering Research Institute, Osaka, Japan
| | | | | | | |
Collapse
|
20
|
Nakao M, Nakayama T, Kakudo A, Inohara M, Harada M, Omura F, Shibano Y. Structure and expression of a gene coding for thermostable alpha-glucosidase with a broad substrate specificity from Bacillus sp. SAM1606. Eur J Biochem 1994; 220:293-300. [PMID: 8125087 DOI: 10.1111/j.1432-1033.1994.tb18625.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
We cloned an alpha-glucosidase gene from thermophilic Bacillus sp. SAM1606 to overexpress it in Escherichia coli transformants. Deletion of the 5'-noncoding region as well as expression of the alpha-glucosidase gene under the control of the icp promotor of the insecticidal crystal protein gene from Bacillus thuringiensis subsp. sotto enhanced the enzyme productivity to 23.5 U/ml, which was 12,000-fold higher than that obtained by the strain SAM1606. The open reading frame corresponding to the alpha-glucosidase encoded 587 amino acid residues including a residue coded by the initiation codon TTG, and the molecular mass of the alpha-glucosidase from N-terminal serine was calculated to be 68,886 Da. Sequence analysis revealed that the SAM1606 alpha-glucosidase belonged to the alpha-amylase family. The SAM1606 alpha-glucosidase showed extremely high sequence identity (62-65%) to the Bacillus cereus and Bacillus thermoglucosidasius oligo-1,6-glucosidases, which were 72% identical to each other. Sequence identity in the suggested active site regions were essentially the same (80-82%) among these three enzymes. However, the substrate specificity of the SAM1606 alpha-glucosidase was significantly different from those of the oligo-1,6-glucosidases. The thermostability of these three alpha-glucosidases could be correlated with the increase in the number of proline residues, whose occurrence was predicted at beta turns and coils in the enzymes.
Collapse
Affiliation(s)
- M Nakao
- Institute for Biomedical Research, Suntory Ltd., Osaka, Japan
| | | | | | | | | | | | | |
Collapse
|
21
|
|
22
|
Abstract
Event-related potentials (ERPs) recorded during a two-tone discrimination (oddball) task were examined in 36 drug-free depressed patients and 36 control subjects. At remission, the ERPs of 12 of the depressed patients were reexamined. In the depressed patients, although a group difference was not detected in the peak latency and amplitude of N200 to rare stimuli, the mean amplitude for the N200 latency range in the difference waves was smaller than in the control subjects. Mismatch negativity (N2a), which was elicited by rare stimuli, was reduced in amplitude; but N2b may have been evoked to frequent stimuli more in the patients than in the control subjects. Depressed subjects may have a deviance in the fully automatic cerebral mismatch process that is assumed to be related to mismatch negativity and provoke the controlled mismatch detection process (presumed to be associated with N2b) even to nontarget frequent stimuli. These findings were observed during remission; however, there was a tendency for the N2b amplitude to decrease and recover toward the level of the control subjects.
Collapse
Affiliation(s)
- C Ogura
- Department of Neuropsychiatry, School of Medicine, University of Ryukyus, Okinawa, Japan
| | | | | | | | | | | | | |
Collapse
|
23
|
Omura F, Otsu M, Yoshimori T, Tashiro Y, Kikuchi M. Non-lysosomal degradation of misfolded human lysozymes with and without an asparagine-linked glycosylation site. Eur J Biochem 1992; 210:591-9. [PMID: 1459141 DOI: 10.1111/j.1432-1033.1992.tb17459.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Human lysozyme is a monomeric secretory protein composed of 130 amino acid residues, with four intramolecular disulfide bonds and no oligosaccharides. In this study, a mutant protein, [Ala128] lysozyme, which cannot fold because it lacks a disulfide bond, Cys6-Cys128, was expressed in mouse fibroblasts and was found to be mostly degraded in the cells, whereas the control wild-type lysozyme was quantitatively secreted into the media. The degradation of [Ala128]lysozyme was independent of the transport from the endoplasmic reticulum to the Golgi apparatus. The degradation was greatly inhibited by incubation of cells at 15 degrees C, but was minimally affected by treatment of cells with the lysosomotropic agent, chloroquine, implying a non-lysosomal process. Additional mutations (Gly48-->Ser or Met29-->Thr) were created to make asparagine-linked (N-linked) glycosylation site in the [Ala128]lysozyme, and the resultant double mutants, [Ser48, Ala128]lysozyme and [Thr29, Ala128]lysozyme, were analyzed with respect to their intracellular degradation. These mutant proteins were susceptible to N-linked glycosylation, and were degraded in a similar manner to that of [Ala128] lysozyme, except that the onset of degradation of [Ser48, Ala128]lysozyme and [Thr29, Ala128] lysozyme, but not of [Ala128]lysozyme, was preceded by a lag period of up to 60 min. Furthermore, the degradative double mutants, [Ser48, Ala128]lysozyme and [Thr29, Ala128]lysozyme, were glycosylated post-translationally as well as co-translationally. These observations suggest that there is some interaction between the mechanisms of glycosylation and degradation.
Collapse
Affiliation(s)
- F Omura
- Protein Engineering Research Institute, Osaka, Japan
| | | | | | | | | |
Collapse
|
24
|
Abstract
The mutant human lysozyme, [Ala77, Ala95]lysozyme, in which the disulfide bond Cys77-Cys95 is eliminated, is known to exhibit increased secretion in yeast, compared to wild-type human lysozyme [Taniyama, Y., Yamamoto, Y., Nakao, M., Kikuchi, M. & Ikehara, M. (1988) Biochem. Biophys. Res. Commun. 152, 962-967]. To investigate this phenomenon, mammalian cells were used to analyze the secretion kinetics of [Ala77, Ala95]lysozyme and wild-type human lysozyme. The secretion rate of [Ala77, Ala95]lysozyme during the 150-min chase period was significantly accelerated [half-life (t1/2) = 29 min] compared to that of wild-type human lysozyme (t1/2 = 83 min), when expressed at the same levels within the cells. In contrast, after the 150-min chase, the rates of disappearance of both wild-type and mutant human lysozymes within the cells were similar, and considerably slower (t1/2 = 220 min), respectively. The remaining intracellular wild-type human lysozyme was localized mainly in the endoplasmic reticulum, whereas accelerated transport of the [Ala77, Ala95]lysozyme mutant protein from the endoplasmic reticulum to the Golgi apparatus was observed. Also in yeast cells, similar secretion kinetics and the differences in t1/2 for wild-type and mutant human lysozymes during the early chase period were observed. The two-phase kinetics of disappearance of intracellular human lysozymes suggest that only a proportion of the proteins becomes secretion competent soon after synthesis and is completely secreted during the early chase period, whereas others enter the distinct, slow pathways of intracellular transport and/or degradation. Increased secretion of [Ala77, Ala95]lysozyme is possibly due to enhanced competence for secretion acquired in the endoplasmic reticulum at the early stage of transport events, which is closely connected with the removal of a disulfide bond.
Collapse
Affiliation(s)
- F Omura
- Protein Engineering Research Institute, Osaka, Japan
| | | | | |
Collapse
|
25
|
Abstract
To investigate the mechanism of disulfide-bond-coupled de novo folding of human lysozyme, we have constructed 23 mutant enzymes in which cysteine residue(s) were replaced by alanine(s). The mutant genes were translated in vitro in a system composed of rabbit reticulocyte lysate, canine pancreatic microsomal vesicles and oxidized glutathione. This system allows the formation of intramolecular disulfide bonds in translation products translocated into the microsomal lumen. The mobilities of the translation products were analyzed by SDS/PAGE in nonreducing conditions. Some mutant lysozymes were found to form a compact conformation with native-like mobility in the presence of SDS. The de novo formation of the SDS-resistant compact conformation of each mutant correlated well with its efficiency of secretion by Saccharomyces cerevisiae. Our results suggest that the de novo synthesized products reflect the conformational states in vivo to some extent, and that the formation of SDS-resistant compact conformation can be regarded as a necessary condition for allowing lysozyme to be secreted. In addition, the analysis of a mutant C116A (Cys116----Ala) under different oxidative conditions suggests two distinct pathways for the disulfide-bond-coupled formation of the compact conformation.
Collapse
Affiliation(s)
- F Omura
- Protein Engineering Research Institute, Osaka, Japan
| | | | | |
Collapse
|
26
|
Taniyama Y, Kuroki R, Omura F, Seko C, Kikuchi M. Evidence for intramolecular disulfide bond shuffling in the folding of mutant human lysozyme. J Biol Chem 1991; 266:6456-61. [PMID: 2007594] [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: 12/29/2022] Open
Abstract
Our previous results using the Saccharomyces cerevisiae secretion system suggest that intramolecular exchange of disulfide bonds occurs in the folding pathway of human lysozyme in vivo (Taniyama, Y., Yamamoto, Y., Kuroki, R., and Kikuchi, M. (1990) J. Biol. Chem. 265, 7570-7575). Here we report on the results of introducing an artificial disulfide bond in mutants with 2 cysteine residues substituting for Ala83 and Asp91. The mutant (C83/91) protein was not detected in the culture medium of the yeast, probably because of incorrect folding. Thereupon, 2 cysteine residues Cys77 and Cys95 were replaced with Ala in the mutant C83/91, because a native disulfide bond Cys77-Cys95 was found not necessary for correct folding in vivo (Taniyama, Y., Yamamoto, Y., Nakao, M., Kikuchi, M., and Ikehara, M. (1988) Biochem. Biophys. Res. Commun. 152, 962-967). The resultant mutant (AC83/91) was secreted as two proteins (AC83/91-a and AC83/91-b) with different specific activities. Amino acid and peptide mapping analyses showed that two glutathiones appeared to be attached to the thiol groups of the cysteine residues introduced into AC83/91-a and that four disulfide bonds including an artificial disulfide bond existed in the AC83/91-b molecule. The presence of cysteine residues modified with glutathione may indicate that the non-native disulfide bond Cys83-Cys91 is not so easily formed as a native disulfide bond. These results suggest that the introduction of Cys83 and Cys91 may act to suppress the process of native disulfide bond formation through disulfide bond interchange in the folding of human lysozyme.
Collapse
Affiliation(s)
- Y Taniyama
- Protein Engineering Research Institute, Osaka, Japan
| | | | | | | | | |
Collapse
|
27
|
Taniyama Y, Kuroki R, Omura F, Seko C, Kikuchi M. Evidence for intramolecular disulfide bond shuffling in the folding of mutant human lysozyme. J Biol Chem 1991. [DOI: 10.1016/s0021-9258(18)38139-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
|
28
|
Ogura C, Nageishi Y, Matsubayashi M, Omura F, Kishimoto A, Shimokochi M. Abnormalities in event-related potentials, N100, P200, P300 and slow wave in schizophrenia. Jpn J Psychiatry Neurol 1991; 45:57-65. [PMID: 1753491 DOI: 10.1111/j.1440-1819.1991.tb00506.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Event-related potentials were recorded in 54 schizophrenics and 88 age-matched controls during a two-tone discrimination (odd ball) task. All the subjects were free from medication. In the schizophrenics, the mean amplitudes of the N100, P300 and Slow Wave latency ranges were decreased, and the amplitude of the P200 latency range was greater than that for the controls. These reductions and the increase were found both for the ERPs elicited by rare target stimuli and for those elicited by frequent nontarget stimuli. The peak latency of N200 to rare stimuli was more prolonged in the schizophrenics than in the controls. This finding confirms the prolongation of N200 latency that Brecher et al. (1987) found for a different visual stimuli task. Neither the N100 nor P300 latency differed between the two groups.
Collapse
Affiliation(s)
- C Ogura
- Department of Neuropsychiatry, University of the Ryukyus, Okinawa, Japan
| | | | | | | | | | | |
Collapse
|
29
|
Abstract
Several mutant cDNAs of elongation factor 2 (EF-2) were constructed by site-directed mutagenesis and their products expressed in mouse cells were investigated. Amino acid substitution for the histidine residue of codon 715, which is modified post-translationally to diphthamide, resulted in non-functional EF-2 and this substitution did not render EF-2 resistant to Pseudomonas aeruginosa exotoxin A, which inactivates EF-2 transferring ADP-ribose to the diphthamide residue. These non-functional EF-2s with replacements of the histidine-715 residue showed various extents of inhibition of protein synthesis by competing with functional EF-2 in vivo. These results suggest that histidine-715 is essential for the translocase activity of EF-2 and that the region around diphthamide functions in recognition of, and/or binding to ribosomes. Substitution of proline for the alanine-713 residue and substitution of glutamine for the glycine-717 residue converted EF-2 to partially toxin-resistant forms. Two-dimensional gel analysis with fragment A of diphtheria toxin of these toxin-resistant EF-2s revealed that their ADP-ribosylations by toxin were much less than that of wild-type EF-2.
Collapse
Affiliation(s)
- F Omura
- Institute for Molecular and Cellular Biology, Osaka University, Japan
| | | | | |
Collapse
|
30
|
Ogura C, Kishimoto A, Kunimoto N, Omura F, Matsubayashi M, Tsutsui T, Shimizu M. Clinical pharmacology of a new antidepressant, Y-8894 in healthy young and elderly volunteers. Br J Clin Pharmacol 1987; 23:537-43. [PMID: 3593624 PMCID: PMC1386189 DOI: 10.1111/j.1365-2125.1987.tb03089.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
In the first experiment the influences of a single oral administration of a new antidepressant, Y-8894 50 mg, nortriptyline 50 mg, and placebo on physiological and psychological parameters were evaluated by a double-blind, crossover method in 10 healthy male volunteers. As the second experiment eight elderly healthy men were also recruited to examine the clinical pharmacology of Y-8894. Y-8894 50 mg showed no significant anticholinergic, sedative, or cardiovascular effect on any of the measures used in young subjects. In the elderly Y-8894 50 mg increased pulse rate (P less than 0.05-0.01), lowered systolic blood pressure (P less than 0.05-0.005), and decreased salivary flow (P less than 0.05) compared with those of pre-drug baseline. C.f.f. was improved after Y-8894 50 mg, but not significantly. Neither psychomotor performance nor immediate memory was influenced after either treatment in young subjects. Furthermore, in the elderly Y-8894 50 mg did not affect these parameters. In the elderly both k21 and ke were smaller, t1/2,z was longer, and AUC was larger compared with young subjects (P less than 0.01). In conclusion, Y-8894 50 mg seemed to lack the anticholinergic, sedative and cardiovascular effects which were observed after nortriptyline 50 mg in young subjects. In the elderly some affects were recognized, in part, due to pharmacokinetic alteration.
Collapse
|
31
|
Ogura C, Kishimoto A, Mizukawa R, Matsubayashi M, Omura F, Kunimoto N. Comparative study of the effects of 9 antidepressants on several physiological parameters in healthy volunteers. Neuropsychobiology 1987; 17:139-44. [PMID: 3683803 DOI: 10.1159/000118354] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Effects on physiological parameters were compared among 9 antidepressants (amitriptyline 50 mg, imipramine 50 mg, nortriptyline 50 mg, amoxapine 50 mg, maprotiline 50 mg, mianserin 20 mg, zimelidine 100 mg, nomifensine 50 mg, and Y-8894 50 mg) after a single oral administration in healthy volunteers. Critical fusion frequency of flicker, body sway distance, salivary flow rate, near blurred point, and pulse rate were employed as parameters. The degree of the drug effects on the physiological parameters could be roughly classified into two to four groups according to maximum percent deviation of each parameter.
Collapse
Affiliation(s)
- C Ogura
- Department of Neuropsychiatry, School of Medicine, University of the Ryukyus, Okinawa, Japan
| | | | | | | | | | | |
Collapse
|
32
|
|
33
|
Inoue H, Hazama H, Hamazoe K, Ichikawa M, Omura F, Fukuma E, Inoue K, Umezawa Y. Antipsychotic and prophylactic effects of acetazolamide (Diamox) on atypical psychosis. Folia Psychiatr Neurol Jpn 1984; 38:425-36. [PMID: 6442984 DOI: 10.1111/j.1440-1819.1984.tb00791.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
We investigated the antipsychotic and prophylactic effects of acetazolamide (Diamox) on atypical psychosis. Acetazolamide was given to 30 patients: Type I, puberal periodic psychosis, a psychosis whose onset occurs during the period of puberty and which appears repetitively with psychosis-like condition at about the same interval as the menstrual cycle (6 cases); Type II, a) presenile atypical psychosis which initially appears in patients in their 20s or 30s accompanied by manic-depressive cycles and shows acute confusional and dreamy states in the presenile period, incurable cases (7), b) atypical psychosis, in the narrow sense, cases which show acute hallucination, delusion, confusional and dreamy states accompanied by affective symptoms (8 cases); Type III, repetitively the atypical manic and depressive states, and atypical manic-depressive psychosis, and transient changes in consciousness, refractory cases (2); Type IV, atypical schizophrenia, which is considered to be schizophrenia but shows the abnormalities in electroencephalogram and emotional disorders (7 cases). Among these cases, some extent of the therapeutic effects of acetazolamide (500-1,000 mg/day) was obtained in about 70%. The high therapeutic effects were particularly observed in Types I, II and III. It was less effective against atypical schizophrenia. Acetazolamide showed the effectiveness in 10 cases out of 13 cases to which lithium carbonate and carbamazepine were ineffective. The high therapeutic effects of acetazolamide were shown in the cases whose symptoms were aggravated at the interval of the menstrual cycle. No correlation was observed between the electroencephalographic abnormalities and the therapeutic effects. In addition, the prophylactic effects of acetazolamide on the periodic crisis were observed in 9 cases. From these results, acetazolamide was considered to have the antipsychotic and prophylactic effects on atypical psychosis. Since side effects due to acetazolamide were rarely observed, the present drug was considered to have a high safety margin.
Collapse
|
34
|
Ogura C, Shiraishi Y, Kishimoto A, Omura F, Kuda K. [Survey on the decline of intellectual functioning with aging in senescence]. Nihon Ronen Igakkai Zasshi 1984; 21:550-7. [PMID: 6533350 DOI: 10.3143/geriatrics.21.550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
|