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Popescu D, Rezus E, Badescu MC, Dima N, Seritean Isac PN, Dragoi IT, Rezus C. Cardiovascular Risk Assessment in Rheumatoid Arthritis: Accelerated Atherosclerosis, New Biomarkers, and the Effects of Biological Therapy. Life (Basel) 2023; 13:life13020319. [PMID: 36836675 PMCID: PMC9965162 DOI: 10.3390/life13020319] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Revised: 01/10/2023] [Accepted: 01/19/2023] [Indexed: 01/24/2023] Open
Abstract
Rheumatoid arthritis (RA), one of the most common of the chronic inflammatory autoimmune diseases (CIADs), is recognized as an independent cardiovascular risk factor. Traditional risk factors such as smoking, arterial hypertension, dyslipidemia, insulin resistance, and obesity are frequently found in RA. Given the increased risk of mortality and morbidity associated with cardiovascular disease (CVD) in RA patients, screening for risk factors is important. Moreover, there is a need to identify potential predictors of subclinical atherosclerosis. Recent studies have shown that markers such as serum homocysteine, asymmetric dimethylarginine, or carotid intima-media thickness (cIMT) are correlated with cardiovascular risk. Although RA presents a cardiovascular risk comparable to that of diabetes, it is not managed as well in terms of acute cardiovascular events. The introduction of biological therapy has opened new perspectives in the understanding of this pathology, confirming the involvement and importance of the inflammatory markers, cytokines, and the immune system. In addition to effects in inducing remission and slowing disease progression, most biologics have demonstrated efficacy in reducing the risk of major cardiovascular events. Some studies have also been conducted in patients without RA, with similar results. However, early detection of atherosclerosis and the use of targeted therapies are the cornerstone for reducing cardiovascular risk in RA patients.
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Affiliation(s)
- Diana Popescu
- Department of Internal Medicine, “Grigore T. Popa” University of Medicine and Pharmacy, 16 University Street, 700115 Iasi, Romania
- Internal Medicine Clinic, “Sf. Spiridon” County Clinical Emergency Hospital, 700111 Iasi, Romania
| | - Elena Rezus
- Department of Rheumatology and Physiotherapy, “Grigore. T. Popa” University of Medicine and Pharmacy, 16 University Street, 700115 Iasi, Romania
- Rheumatology Clinic, Clinical Rehabilitation Hospital, 700661 Iasi, Romania
- Correspondence: (E.R.); (M.C.B.)
| | - Minerva Codruta Badescu
- Department of Internal Medicine, “Grigore T. Popa” University of Medicine and Pharmacy, 16 University Street, 700115 Iasi, Romania
- Internal Medicine Clinic, “Sf. Spiridon” County Clinical Emergency Hospital, 700111 Iasi, Romania
- Correspondence: (E.R.); (M.C.B.)
| | - Nicoleta Dima
- Department of Internal Medicine, “Grigore T. Popa” University of Medicine and Pharmacy, 16 University Street, 700115 Iasi, Romania
- Internal Medicine Clinic, “Sf. Spiridon” County Clinical Emergency Hospital, 700111 Iasi, Romania
| | - Petronela Nicoleta Seritean Isac
- Department of Internal Medicine, “Grigore T. Popa” University of Medicine and Pharmacy, 16 University Street, 700115 Iasi, Romania
- Internal Medicine Clinic, “Sf. Spiridon” County Clinical Emergency Hospital, 700111 Iasi, Romania
| | - Ioan-Teodor Dragoi
- Department of Rheumatology and Physiotherapy, “Grigore. T. Popa” University of Medicine and Pharmacy, 16 University Street, 700115 Iasi, Romania
- Rheumatology Clinic, Clinical Rehabilitation Hospital, 700661 Iasi, Romania
| | - Ciprian Rezus
- Department of Internal Medicine, “Grigore T. Popa” University of Medicine and Pharmacy, 16 University Street, 700115 Iasi, Romania
- Internal Medicine Clinic, “Sf. Spiridon” County Clinical Emergency Hospital, 700111 Iasi, Romania
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Melayah S, Ghozzi M, Ghedira I, Mankaï A. Anticardiolipin and anti-beta 2-glycoprotein I antibodies in patients with unexplained articular manifestations. J Clin Lab Anal 2022; 37:e24812. [PMID: 36514859 PMCID: PMC9833978 DOI: 10.1002/jcla.24812] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 11/29/2022] [Accepted: 12/03/2022] [Indexed: 12/15/2022] Open
Abstract
OBJECTIVE To determine the frequency of antiphospholipid antibodies (aPL) in patients with unexplained articular manifestations. MATERIAL AND METHODS Three hundred thirteen patients suffering from arthritis or arthralgia without evident cause and 266 healthy blood donors (HBD) were included in the study. Anticardiolipin antibodies (aCL) and anti-beta 2-glycoprotein I antibodies (aβ2GPI) were measured by ELISA. RESULT Out of the 313 patients, 250 were females and 63 were males. The mean age of patients was 49 ± 14 years (17-87 years). One hundred eleven patients have arthralgia and 202 have arthritis. The frequency of aCL and/or aβ2 GPI (24.9%) was significantly higher in patients than in HBD (10.9%). The frequency of aβ2GPI was 23.6% in patients and 9.4% in the control group (p < 10-3 ). aβ2GPI-IgA was significantly more frequent in patients than in the control group (20.4% vs. 7.5%, p < 10-3 ). aβ2GPI was most commonly observed than aCL in patients (23.6% vs. 6.4%, p < 10-6 ). IgA isotype of aβ2GPI was the most frequent in 20.4% of patients while IgG and IgM were detected in 5.4% and 2.9% respectively. CONCLUSION This study showed that aPL were common in patients with articular manifestations and were mainly directed against β2 GPI. The role of these antibodies remains to be specified.
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Affiliation(s)
- Sarra Melayah
- Immunology LaboratoryFarhat Hached HospitalSousseTunisia
- Faculty of PharmacyMonastir UniversityMonastirTunisia
- Resarch Unit LR12SP11 on "Biologie moléculaire appliquée aux maladies cardiovasculaires et neurologiques, aux néphropathies héréditaires et à la pharmacogénétique" Biochemistry DepartmentSahloul University HospitalSousseTunisia
| | - Mariem Ghozzi
- Immunology LaboratoryFarhat Hached HospitalSousseTunisia
- Faculty of PharmacyMonastir UniversityMonastirTunisia
- Research Laboratory for "Epidemiology and Immunogenetics of Viral Infections, LR14SP02"Sahloul University HospitalSousseTunisia
| | - Ibtissem Ghedira
- Immunology LaboratoryFarhat Hached HospitalSousseTunisia
- Faculty of PharmacyMonastir UniversityMonastirTunisia
| | - Amani Mankaï
- Immunology LaboratoryFarhat Hached HospitalSousseTunisia
- Higher School of Health and Technical SciencesTunis El Manar UniversityTunisTunisia
- Research Unit UR18ES01 on "Obesity: etiopathology and treatment" National Institute of Nutrition and Food TechnologyTunisTunisia
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Elkhalifa M, Orbai AM, Magder LS, Petri M, Alarcón GS, Gordon C, Merrill J, Fortin PR, Bruce IN, Isenberg D, Wallace D, Nived O, Ramsey-Goldman R, Bae SC, Hanly JG, Sanchez-Guerrero J, Clarke AE, Aranow C, Manzi S, Urowitz M, Gladman DD, Kalunian K, Werth VP, Zoma A, Bernatsky S, Khamashta M, Jacobsen SØ, Buyon JP, Dooley MA, Vollenhoven RV, Ginzler E, Stoll T, Peschken C, Jorizzo JL, Callen JP, Lim S, Inanc M, Kamen DL, Rahman A, Steinsson K, Franks AG. Anti-beta 2 glycoprotein I IgA in the SLICC classification criteria dataset. Lupus 2021; 30:1283-1288. [PMID: 33957797 PMCID: PMC10140618 DOI: 10.1177/09612033211014248] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
OBJECTIVE Anti-beta 2 glycoprotein I IgA is a common isotype of anti-beta 2 glycoprotein I in SLE. Anti-beta 2 glycoprotein I was not included in the American College of Rheumatology (ACR) SLE classification criteria, but was included in the Systemic Lupus International Collaborating Clinics (SLICC) criteria. We aimed to evaluate the prevalence of anti-beta 2-glycoprotein I IgA in SLE versus other rheumatic diseases. In addition, we examined the association between anti-beta 2 glycoprotein I IgA and disease manifestations in SLE. METHODS The dataset consisted of 1384 patients, 657 with a consensus physician diagnosis of SLE and 727 controls with other rheumatic diseases. Anti-beta 2 glycoprotein I isotypes were measured by ELISA. Patients with a consensus diagnosis of SLE were compared to controls with respect to presence of anti-beta 2 glycoprotein I. Among patients with SLE, we assessed the association between anti-beta 2 glycoprotein I IgA and clinical manifestations. RESULTS The prevalence of anti-beta 2 glycoprotein I IgA was 14% in SLE patients and 7% in rheumatic disease controls (odds ratio, OR 2.3, 95% CI: 1.6, 3.3). It was more common in SLE patients who were younger patients and of African descent (p = 0.019). Eleven percent of SLE patients had anti-beta 2 glycoprotein I IgA alone (no anti-beta 2 glycoprotein I IgG or IgM). There was a significant association between anti-beta 2 glycoprotein I IgA and anti-dsDNA (p = 0.001) and the other antiphospholipid antibodies (p = 0.0004). There was no significant correlation of anti-beta 2 glycoprotein I IgA with any of the other ACR or SLICC clinical criteria for SLE. Those with anti-beta 2 glycoprotein I IgA tended to have a history of thrombosis (12% vs 6%, p = 0.071), but the difference was not statistically significant. CONCLUSION We found the anti-beta 2 glycoprotein I IgA isotype to be more common in patients with SLE and in particular, with African descent. It could occur alone without other isotypes.
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Affiliation(s)
- Marwa Elkhalifa
- Department of Medicine, Alexandria University, Alexandria, Egypt.,Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Ana-Maria Orbai
- Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Laurence S Magder
- Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Michelle Petri
- Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Graciela S Alarcón
- Department of Medicine, Division of Clinical Immunology and Rheumatology, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Caroline Gordon
- Institute of Inflammation and Ageing, College of Medical and Dental Sciences, University of Birmingham, Birmingham, UK
| | - Joan Merrill
- Department of Clinical Pharmacology, Oklahoma Medical Research Foundation, Oklahoma City, OK, USA
| | - Paul R Fortin
- Division of Rheumatology, CHU de Québec - Université Laval, Quebec City, Canada
| | - Ian N Bruce
- Arthritis Research UK Centre for Epidemiology, Centre for Musculoskeletal Research, Faculty of Biology, Medicine and Health, The University of Manchester and NIHR Manchester Biomedical Research Centre, Manchester University Hospital NHS Foundation Trust, Manchester Academic Health Science Center, Manchester, UK
| | - David Isenberg
- Centre for Rheumatology Research, University College, London, UK
| | - Daniel Wallace
- Cedars-Sinai/David Geffen School of Medicine at UCLA, Los Angeles, CA, USA
| | - Ola Nived
- Department of Clinical Sciences Lund, Lund University, Lund, Sweden
| | | | - Sang-Cheol Bae
- Department of Rheumatology, Hanyang University Hospital for Rheumatic Diseases, Seoul, Korea
| | - John G Hanly
- Division of Rheumatology, Department of Medicine and Department of Pathology, Queen Elizabeth II Health Sciences Centre, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Jorge Sanchez-Guerrero
- Centre for Prognosis Studies in the Rheumatic Diseases, Toronto Western Hospital and University of Toronto, Toronto, Ontario, Canada
| | - Ann E Clarke
- Division of Rheumatology, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Cynthia Aranow
- Feinstein Institute for Medical Research, Manhasset, NY, USA
| | - Susan Manzi
- Autoimmunity Institute, Allegheny Health Network, Pittsburgh, PA, USA
| | - Murray Urowitz
- Centre for Prognosis Studies in the Rheumatic Diseases, Toronto Western Hospital and University of Toronto, Toronto, Ontario, Canada
| | - Dafna D Gladman
- Centre for Prognosis Studies in the Rheumatic Diseases, Toronto Western Hospital and University of Toronto, Toronto, Ontario, Canada
| | | | - Victoria P Werth
- Division of Dermatology, Hospital of the University of Pennsylvania and the Veteran's Administration Medical Center, Philadelphia, PA, USA
| | - Asad Zoma
- Lanarkshire Centre for Rheumatology, Hairmyres Hospital, Scotland, UK
| | - Sasha Bernatsky
- Division of Rheumatology, Department of Medicine, McGill University Health Centre, Montreal, Quebec, Canada
| | - Munther Khamashta
- Lupus Research Unit, The Rayne Institute, St Thomas' Hospital, King's College London School of Medicine, London, UK
| | - SØren Jacobsen
- Copenhagen Lupus and Vasculitis Clinic, Centre for Rheumatology and Spine Diseases, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark
| | - Jill P Buyon
- Division of Rheumatology, Department of Medicine, New York University School of Medicine, New York, NY, USA
| | - Mary Anne Dooley
- Division of Rheumatology and Immunology, Department of Medicine, University of North Carolina, Chapel Hill, NC, USA
| | - Ronald van Vollenhoven
- Amsterdam University Medical Centres, University of Amsterdam, Amsterdam, Netherlands.,Free University (VU) Amsterdam, Amsterdam, Netherlands.,Amsterdam Rheumatology and Immunology Center, Amsterdam, Netherlands
| | - Ellen Ginzler
- Department of Medicine, SUNY Downstate Medical Center, Brooklyn, NY, USA
| | - Thomas Stoll
- Department of Rheumatology, Kantonsspital, Schaffhausen, Switzerland
| | - Christine Peschken
- Department of Medicine and Community Health Sciences, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Joseph L Jorizzo
- Department of Dermatology, Weill Cornell Medicine, New York, NY, USA
| | - Jeffery P Callen
- Department of Medicine, University of Louisville School of Medicine, Louisville, KY, USA
| | - Sam Lim
- Division of Rheumatology, Emory University School of Medicine, Atlanta, GA, USA
| | - Murat Inanc
- Division of Rheumatology, Department of Internal Medicine, Istanbul Medical Faculty, Istanbul University, Istanbul, Turkey
| | - Diane L Kamen
- Division of Rheumatology, Medical University of South Carolina, Charleston, SC, USA
| | - Anisur Rahman
- Centre for Rheumatology Research, University College, London, UK
| | - Kristjan Steinsson
- Department of Rheumatology, Center for Rheumatology Research Fossvogur Landspitali University Hospital, Reyjkavik, Iceland
| | - Andrew G Franks
- Division of Rheumatology, Department of Medicine and The Department of Dermatology, New York University School of Medicine, New York, NY, USA
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Karpouzas GA, Ormseth SR, Hernandez E, Bui VL, Budoff MJ. Beta-2-glycoprotein-I IgA antibodies predict coronary plaque progression in rheumatoid arthritis. Semin Arthritis Rheum 2020; 51:20-27. [PMID: 33360226 DOI: 10.1016/j.semarthrit.2020.10.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Revised: 09/22/2020] [Accepted: 10/16/2020] [Indexed: 11/29/2022]
Abstract
OBJECTIVES To evaluate whether anti-Beta-2-Glycoprotein-I (anti-β2GPI) IgA antibodies associate with progression of coronary atherosclerosis and cardiovascular disease (CVD) events in rheumatoid arthritis (RA). METHODS One hundred-fifty patients underwent plaque evaluation (total, non-calcified, mixed and calcified) with coronary computed tomography angiography; 101 were re-imaged within 6.9±0.3 years to assess progression. The Framingham-D'Agostino score assessed cardiovascular risk. Coronary artery calcium (CAC) and segment involvement score quantified plaque burden. RESULTS Anti-β2GPI IgA were seen in 45 (30%) patients. Despite no link to baseline plaque burden, anti-β2GPI IgA associated with segment involvement score increase (adjusted-RR=1.64 [95%CI 1.02-2.63]), CAC change (adjusted-β=0.33 [95%CI 0.002-0.656]) and developing new extensive or obstructive plaque at follow-up (adjusted-OR=4.24 [95%CI 1.30-13.87]). Adding anti-β2GPI IgA to logistic regression models with conventional risk factors predicting plaque progression outcomes increased Area under the receiver-operator curve and improved Net Reclassification and Integrated Discrimination Improvement indices (all P<0.05). In per-segment analyses, anti-β2GPI IgA predicted mixed plaque formation (adjusted-OR=3.20 [95%CI 1.01-10.09]) and lower likelihood of transition of mixed to calcified plaque (adjusted-OR=0.19 [95%CI 0.04-0.96]). Anti-β2GPI IgA moderated the effect of C-reactive protein on CAC change such that C-reactive protein associated with CAC change (β=0.26 [95%CI 0.14-0.38]) and CVD risk (adjusted-HR=1.89 [95%CI 1.02-3.51]) only in anti-β2GPI IgA positive patients. CONCLUSION Anti-β2GPI IgA addition to clinical risk models improved prediction accuracy of CAC, plaque progression and transition to extensive/obstructive disease. They associated with new high-risk mixed plaques and delayed healing to calcified lesions. Anti-β2GPI IgA further modified the effect of inflammation on plaque progression and CVD events.
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Affiliation(s)
- George A Karpouzas
- Division of Rheumatology, Harbor-UCLA Medical Center and Lundquist Institute for Biomedical Innovation, 1124 West Carson Street, Building E4-R17, Torrance, CA 90502, USA.
| | - Sarah R Ormseth
- Division of Rheumatology, Harbor-UCLA Medical Center and Lundquist Institute for Biomedical Innovation, 1124 West Carson Street, Building E4-R17, Torrance, CA 90502, USA
| | - Elizabeth Hernandez
- Division of Rheumatology, Harbor-UCLA Medical Center and Lundquist Institute for Biomedical Innovation, 1124 West Carson Street, Building E4-R17, Torrance, CA 90502, USA
| | - Viet L Bui
- Division of Rheumatology, Harbor-UCLA Medical Center and Lundquist Institute for Biomedical Innovation, 1124 West Carson Street, Building E4-R17, Torrance, CA 90502, USA
| | - Matthew J Budoff
- Division of Cardiology, Harbor-UCLA Medical Center and Lundquist Institute for Biomedical Innovation, Torrance, CA, USA
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The Weight of IgA Anti-β2glycoprotein I in the Antiphospholipid Syndrome Pathogenesis: Closing the Gap of Seronegative Antiphospholipid Syndrome. Int J Mol Sci 2020; 21:ijms21238972. [PMID: 33255963 PMCID: PMC7730063 DOI: 10.3390/ijms21238972] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 11/20/2020] [Accepted: 11/23/2020] [Indexed: 12/12/2022] Open
Abstract
The specific value of IgA Anti-β2glycoprotein I antibodies (aB2GP1) in the diagnosis and management of antiphospholipid syndrome (APS) is still controversial and a matter of active debate. The relevance of the IgA aB2GP1 isotype in the pathophysiology of APS has been increasingly studied in the last years. There is well know that subjects with multiple positive APS tests are at increased risk of thrombosis and/or miscarriage. However, these antibodies are not included in the 2006 APS classification criteria. Since 2010 the task force of the Galveston International Congress on APS recommends testing IgA aB2GP1 isotype in patients with APS clinical criteria in the absence of criteria antibodies. In this review, we summarize the molecular and clinical “state of the art” of the IgA aB2GP in the context of APS. We also discuss some of the characteristics that may help to evaluate the real value of the IgA aB2GP1 determination in basic research and clinical practice. The scientific community should be aware of the importance of clarifying the role of IgA aB2GP1 in the APS diagnosis.
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Melendez QM, Wooten CJ, Krishnaji ST, Knagge K, Kirchner D, Lopez D. Identification of Novel Proteins Interacting with Proprotein Convertase Subtilisin/Kexin 9. INTERNATIONAL JOURNAL OF BIOMEDICAL INVESTIGATION 2020; 3:123. [PMID: 32587953 PMCID: PMC7316369 DOI: 10.31531/2581-4745.1000123] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
High levels of cholesterol, especially as low-density lipoprotein (LDL), are a well-known risk factor for atherosclerotic-related diseases. The key atherogenic property of LDL is its ability to form atherosclerotic plaque. Proprotein convertase subtilisin/kexin-9 (PCSK9) is an indirect regulator of plasma LDL levels by controlling the number of LDL receptor molecules expressed at the plasma membrane, especially in the liver. Herein, we performed a combination of affinity chromatography, mass spectrometry analysis and identification, and gene expression studies to identify proteins that interact with PCSK9. Through these studies, we identified three proteins, alpha-1-antitrypsin (A1AT), alpha-1-microglobulin/bikunin precursor (AMBP), and apolipoprotein H (APOH) expressed by C3A cells that interact with PCSK9. The expression levels of A1AT and APOH increased in cells treated with MITO+ medium, a condition previously shown to affect the function of PCSK9, as compared to treating with Regular (control) medium. However, AMBP expression did not change in response to the treatments. Additional studies are required to determine which of these proteins can modulate the expression/function of PCSK9. The identification of endogenous modulators of PCSK9's function could lead to the development of novel diagnostic tests or treatment options for patients suffering hypercholesterolemia in combination with other chronic metabolic diseases.
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Affiliation(s)
- Quantil M. Melendez
- Department of Pharmaceutical Sciences, Biomanufacturing Research Institute and Technology Enterprise (BRITE), College of Arts and Sciences, North Carolina Central University, Durham, USA
| | - Catherine J. Wooten
- Department of Pharmaceutical Sciences, Biomanufacturing Research Institute and Technology Enterprise (BRITE), College of Arts and Sciences, North Carolina Central University, Durham, USA
| | | | - Kevin Knagge
- David H Murdock Research Institute, Kannapolis, USA
| | | | - Dayami Lopez
- Department of Pharmaceutical Sciences, Biomanufacturing Research Institute and Technology Enterprise (BRITE), College of Arts and Sciences, North Carolina Central University, Durham, USA
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Liu P, Wu M, Zhang N, Chen C, Xiong B, Zhang X. Multimodal computed tomography-guided intravenous rtPA for aborted stroke in a HIV-infected young man: a case report. BMC Infect Dis 2018; 18:434. [PMID: 30157782 PMCID: PMC6114031 DOI: 10.1186/s12879-018-3357-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Accepted: 08/23/2018] [Indexed: 11/12/2022] Open
Abstract
Background Human immunodeficiency virus (HIV) infection has been recognized as a risk factor for both ischemic and hemorrhagic stroke among young adults. However, information on the optimal management of HIV patients presenting with presumed acute ischemic stroke within the time window of intravenous recombinant tissue plasminogen activator (IV-rtPA) thrombolysis is limited. To the best of our knowledge, the use of multimodal computed tomography (CT)-based imaging to guide acute-phase treatment for patients with HIV infection has never been reported. Case presentation We report the clinical, imaging, and immunological features of a young man suffering from presumed acute ischemic stroke, initially without awareness of the presence of HIV infection. IV-rtPA guided by multimodal CT, including brain CT angiography (CTA) and CT perfusion (CTP), was administered at the emergency department. His symptoms were relieved, and there was no recurrence during the 2-month follow up. Conclusions Mutimodal CT is a valuable and promising tool for the early management of HIV-infected patients, especially for those presenting within the strict thrombolysis time window.
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Affiliation(s)
- Ping Liu
- Department of Neurology, First Affiliated Hospital, School of Medicine, Zhejiang University, 79 Qingchun Road, Hangzhou, 310003, China.
| | - Min Wu
- Department of Neurology, First Affiliated Hospital, School of Medicine, Zhejiang University, 79 Qingchun Road, Hangzhou, 310003, China
| | - Ning Zhang
- Department of Neurology, Pujiang People's Hospital, Pujiang, Jinhua, 322200, China
| | - Chunyou Chen
- Department of Neurology, the First People's Hospital of Wenling, Wenling, Taizhou, 317500, China
| | - Bing Xiong
- Department of Radiology, First Affiliated Hospital, School of Medicine, Zhejiang University, 79 Qingchun Road, Hangzhou, 310003, China
| | - Xiaoying Zhang
- Department of Neurology, First Affiliated Hospital, School of Medicine, Zhejiang University, 79 Qingchun Road, Hangzhou, 310003, China
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Vlagea A, Pascual-Salcedo D, Álvarez Doforno R, Lavilla P, Diez J, Padilla Merlano B, Cuesta MV, Gil A. IgA anti-β2 glycoprotein I antibodies: Experience from a large center. Thromb Res 2017; 162:38-43. [PMID: 29274563 DOI: 10.1016/j.thromres.2017.12.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2017] [Revised: 11/16/2017] [Accepted: 12/11/2017] [Indexed: 02/06/2023]
Abstract
OBJECTIVE IgG and IgM antibodies directed at β2-glycoprotein I are included in the classification criteria for the antiphospholipid syndrome (APS) while the IgA antibodies against β2-glycoprotein I (IgA aβ2GPI) are not. Conflicting data about the significance of IgA aβ2GPI and APS manifestation can be found and more studies are necessary in order to define the diagnostic value of IgA aβ2GPI. In the present article, we investigated the possible role of IgA aβ2GPI as marker of APS. METHODS A cohort of 314 patients with APS and systemic autoimmune disease was investigated for the presence of IgA aβ2GPI and its association with clinical manifestation of APS. RESULTS Eighty-nine patients presented IgA aβ2GPI, 68 cases associated with others antiphospholipid antibodies (aPL) and in 21 cases being the only aPL present. In primary APS IgA aβ2GPI are highly coincidental with other aPL (92,2%) while most of the isolated IgA aβ2GPI were present in the SLE group (16/21). No association between IgA aβ2GPI and APS manifestations: thrombosis and pregnancy morbidity was found, while a positive association between IgA aβ2GPI and the presence of anti-nDNA, anti-RNP, anti-Sm, anti-SSA, anti-SSB antibodies was encountered. CONCLUSION Our study does not show association between IgA aβ2GPI and APS manifestations and does not support the inclusion of IgA aβ2GPI as a classification criteria for APS.
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Affiliation(s)
- Alexandru Vlagea
- Immunology Department, Hospital Clinic, Barcelona, Spain; Immunology Department, Hospital La Paz, Madrid, Spain.
| | | | | | - Paz Lavilla
- Internal Medicine Department, Hospital La Paz, Madrid, Spain
| | - Jesús Diez
- Department of Biostatistics in Medicine, Hospital La Paz, Madrid, Spain
| | | | | | - Antonio Gil
- Internal Medicine Department, Hospital La Paz, Madrid, Spain
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Immune-inflammatory responses in atherosclerosis: Role of an adaptive immunity mainly driven by T and B cells. Immunobiology 2016; 221:1014-33. [PMID: 27262513 DOI: 10.1016/j.imbio.2016.05.010] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2016] [Revised: 05/06/2016] [Accepted: 05/23/2016] [Indexed: 01/22/2023]
Abstract
Adaptive immune response plays an important role in atherogenesis. In atherosclerosis, the proinflammatory immune response driven by Th1 is predominant but the anti-inflammatory response mediated mainly by regulatory T cells is also present. The role of Th2 and Th17 cells in atherogenesis is still debated. In the plaque, other T helper cells can be observed such as Th9 and Th22 but is little is known about their impact in atherosclerosis. Heterogeneity of CD4(+) T cell subsets presented in the plaque may suggest for plasticity of T cell that can switch the phenotype dependening on the local microenvironment and activating/blocking stimuli. Effector T cells are able to recognize self-antigens released by necrotic and apoptotic vascular cells and induce a humoral immune reaction. Tth cells resided in the germinal centers help B cells to switch the antibody class to the production of high-affinity antibodies. Humoral immunity is mediated by B cells that release antigen-specific antibodies. A variety of B cell subsets were found in human and murine atherosclerotic plaques. In mice, B1 cells could spontaneously produce atheroprotective natural IgM antibodies. Conventional B2 lymphocytes secrete either proatherogenic IgG, IgA, and IgE or atheroprotective IgG and IgM antibodies reactive with oxidation-specific epitopes on atherosclerosis-associated antigens. A small population of innate response activator (IRA) B cells, which is phenotypically intermediate between B1 and B2 cells, produces IgM but possesses proatherosclerotic properties. Finally, there is a minor subset of splenic regulatory B cells (Bregs) that protect against atherosclerotic inflammation through support of generation of Tregs and production of anti-inflammatory cytokines IL-10 and TGF-β and proapoptotic molecules.
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Hood DB, Snyder KR, Buckner TR, Hurley BL, Pitts KR, Lopez LR. Differential assay reactivity of immunglobulin A anti-ß 2 glycoprotein I antibodies: implications for the clinical interpretation of antiphospholipid antibody testing. Eur J Rheumatol 2015; 2:135-138. [PMID: 27708950 DOI: 10.5152/eurjrheum.2015.0012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2015] [Accepted: 04/17/2015] [Indexed: 11/22/2022] Open
Abstract
OBJECTIVE The routine measurement of IgA anticardiolipin (aCL) and IgA anti-β2 glycoprotein I (anti-β2 GPI) antibodies remain controversial despite several studies demonstrating an association with thromboembolic disease in patients with systemic lupus erythematosus (SLE) and antiphospholipid syndrome (APS). This controversy may be a contributing factor for the current under use of IgA antiphospholipid antibodies. We aimed to investigate the nature of discrepant IgA anti-β2 GPI reactivity to help define the diagnostic value of IgA antiphospholipid antibodies. MATERIAL AND METHODS Four sera selected from SLE/APS patients and positive for antiphospholipid antibodies but having discrepant IgA anti-β2 GPI reactivity on two commercial assays were studied. IgA antibodies were affinity purified to investigate anti-β2 GPI reactivity. Column wash through and eluent fractions were tested on both IgA anti-β2 GPI assays. Results were normalized to total protein. Assay conjugates and standards from the discrepant assays were interchanged. RESULTS The diseased samples were strongly positive in one assay [144-388 IgA antiphospholipid (APL) units] and negative or weakly positive in another assay (9.9-53 APL units). IgA eluents from IgA anti-β2 GPI positive samples reacted 10 times stronger on the reactive assay. When normalized to protein content, the eluents showed no cross-reactivity for IgG or IgM anti-β2 GPI antibodies, confirming IgA isotype specificity. Conjugate interchange confirmed that both assays bound IgA anti-β2 GPI antibodies, but the anti-IgA conjugate from the reactive assay was 4 times stronger, suggesting that its ability to detect IgA anti-β2 GPI antibodies was partially dependent on the anti-IgA conjugate and calibration. CONCLUSION These results confirm not only the presence of IgA anti-β2 GPI antibodies in the selected patient samples but also highlight an IgA conjugate issue for the unreactive assay, causing an underestimation of IgA anti-β2 GPI. This finding may assist in the ongoing standardization efforts of APS antibody testing. In addition, conclusions from published clinical studies may need to be revised as some assays may understate IgA significance.
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Affiliation(s)
- David B Hood
- Corgenix Medical Corporation, Broomfield, Colorado, USA
| | | | | | - Beth L Hurley
- Corgenix Medical Corporation, Broomfield, Colorado, USA
| | - Kelly R Pitts
- Corgenix Medical Corporation, Broomfield, Colorado, USA
| | - Luis R Lopez
- Corgenix Medical Corporation, Broomfield, Colorado, USA
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Sipeki N, Davida L, Palyu E, Altorjay I, Harsfalvi J, Antal Szalmas P, Szabo Z, Veres G, Shums Z, Norman GL, Lakatos PL, Papp M. Prevalence, significance and predictive value of antiphospholipid antibodies in Crohn’s disease. World J Gastroenterol 2015; 21:6952-6964. [PMID: 26078573 PMCID: PMC4462737 DOI: 10.3748/wjg.v21.i22.6952] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/31/2014] [Revised: 03/01/2015] [Accepted: 04/09/2015] [Indexed: 02/06/2023] Open
Abstract
AIM: To assess the prevalence and stability of different antiphospholipid antibodies (APLAs) and their association with disease phenotype and progression in inflammatory bowel diseases (IBD) patients.
METHODS: About 458 consecutive patients [Crohn’s disease (CD): 271 and ulcerative colitis (UC): 187] were enrolled into a follow-up cohort study in a tertiary IBD referral center in Hungary. Detailed clinical phenotypes were determined at enrollment by reviewing the patients’ medical charts. Disease activity, medical treatment and data about evolvement of complications or surgical interventions were determined prospectively during the follow-up. Disease course (development f complicated disease phenotype and need for surgery), occurrence of thrombotic events, actual state of disease activity according to clinical, laboratory and endoscopic scores and accurate treatment regime were recorded during the follow-up, (median, 57.4 and 61.6 mo for CD and UC). Sera of IBD patients and 103 healthy controls (HC) were tested on individual anti-β2-Glycoprotein-I (anti-β2-GPI IgA/M/G), anti-cardiolipin (ACA IgA/M/G) and anti-phosphatidylserine/prothrombin (anti-PS/PT IgA/M/G) antibodies and also anti-Saccharomyces cerevisiae antibodies (ASCA IgA/G) by enzyme-linked immunosorbent assay (ELISA). In a subgroup of CD (n = 198) and UC patients (n = 103), obtaining consecutive samples over various arbitrary time-points during the disease course, we evaluated the intraindividual stability of the APLA status. Additionally, we provide an overview of studies, performed so far, in which significance of APLAs in IBD were assessed.
RESULTS: Patients with CD had significantly higher prevalence of both ACA (23.4%) and anti-PS/PT (20.4%) antibodies than UC (4.8%, P < 0.0001 and 10.2%, P = 0.004) and HC (2.9%, P < 0.0001 and 15.5%, P = NS). No difference was found for the prevalence of anti-β2-GPI between different groups (7.2%-9.7%). In CD, no association was found between APLA and ASCA status of the patients. Occurrence of anti-β2-GPI, ACA and anti-PS/PT was not different between the group of patients with active vs inactive disease state according to appropriate clinical, laboratory and endoscopic scores in CD as well as in UC patients. All subtypes of anti-β2-GPI and ACA IgM status were found to be very stable over time, in contrast ACA IgG and even more ACA IgA status showed significant intraindividual changes. Changes in antibody status were more remarkable in CD than UC (ACA IgA: 49.9% vs 23.3% and ACA IgG: 21.2% vs 5.8%). Interestingly, 59.1% and 30.1% of CD patients who received anti-TNF therapy showed significant negative to positive changes in ACA IgA and IgG antibody status respectively. APLA status was not associated with the clinical phenotype at diagnosis or during follow-up, medical therapy, or thrombotic events and it was not associated with the probability of developing complicated disease phenotype or surgery in a Kaplan-Meier analysis.
CONCLUSION: The present study demonstrated enhanced formation of APLAs in CD patients. However, presence of different APLAs were not associated with the clinical phenotype or disease course.
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Serrano M, Martínez-Flores JA, Castro MJ, García F, Lora D, Pérez D, Gonzalez E, Paz-Artal E, Morales JM, Serrano A. Renal transplantation dramatically reduces IgA anti-beta-2-glycoprotein I antibodies in patients with endstage renal disease. J Immunol Res 2014; 2014:641962. [PMID: 24818167 PMCID: PMC4003762 DOI: 10.1155/2014/641962] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2014] [Revised: 03/10/2014] [Accepted: 03/10/2014] [Indexed: 02/04/2023] Open
Abstract
IgA anti-beta-2-glycoprotein I (aB2GPI) antibodies have been related to vascular pathology in the general population and mainly in hemodialyzed patients (prevalence 33%) in whom an elevated incidence of thrombosis and mortality is found. In this paper we have studied the presence of IgA aB2GPI antibodies at pretransplant and their evolution after transplantation with a cross-sectional-based follow-up study of a cohort of 288 endstage renal disease (ESRD) patients treated with kidney transplantation. Pretransplant IgA aB2GPI levels were elevated 31.7 ± 4.2 U/mL without differences in age or type of dialysis. Patients with different etiologies of ESRD showed higher levels of IgA aB2GPI than blood donors, except the groups of non-IgA glomerular disease and systemic erythematosus lupus, whose nonsignificant differences were observed. IgA aB2GPI antibodies dropped immediately after transplantation (10.7 ± 1.0 U/mL, P < 0.0001), coinciding with a high degree of immunosuppression, and remained significantly lower than that observed in pretransplant status. Prevalence of patients with elevated antibodies was also less in transplanted patients (8.9% versus 30.4%, P < 0.0001). Among, positivity for IgA aB2GPI was higher than in patients who had received their first transplant that those were retransplanted. This finding could have important clinical implications and can suggest new therapeutic strategies in patients with IgA aB2GPI antibodies.
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Affiliation(s)
- Manuel Serrano
- Servicio de Nefrología, Instituto de Investigacion Hospital Universitario 12 de Octubre, Avenida Córdoba s/n, 28041 Madrid, Spain
| | - Jose Angel Martínez-Flores
- Servicio de Inmunología, Instituto de Investigacion Hospital Universitario 12 de Octubre, Avenida Córdoba s/n, 28041 Madrid, Spain
| | - Maria José Castro
- Servicio de Inmunología, Instituto de Investigacion Hospital Universitario 12 de Octubre, Avenida Córdoba s/n, 28041 Madrid, Spain
| | - Florencio García
- Servicio de Nefrología, Instituto de Investigacion Hospital Universitario 12 de Octubre, Avenida Córdoba s/n, 28041 Madrid, Spain
| | - David Lora
- Servicio de Epidemiología, Instituto de Investigacion Hospital Universitario 12 de Octubre, Avenida Córdoba s/n, 28041 Madrid, Spain
| | - Dolores Pérez
- Servicio de Inmunología, Instituto de Investigacion Hospital Universitario 12 de Octubre, Avenida Córdoba s/n, 28041 Madrid, Spain
| | - Esther Gonzalez
- Servicio de Nefrología, Instituto de Investigacion Hospital Universitario 12 de Octubre, Avenida Córdoba s/n, 28041 Madrid, Spain
| | - Estela Paz-Artal
- Servicio de Inmunología, Instituto de Investigacion Hospital Universitario 12 de Octubre, Avenida Córdoba s/n, 28041 Madrid, Spain
- Sección de Inmunología, Universidad San Pablo-CEU, Campus de Monteprincipe, 28668 Madrid, Spain
- Facultad de Medicina, Universidad Complutense, 28040 Madrid, Spain
| | - Jose M. Morales
- Servicio de Nefrología, Instituto de Investigacion Hospital Universitario 12 de Octubre, Avenida Córdoba s/n, 28041 Madrid, Spain
- Facultad de Medicina, Universidad Complutense, 28040 Madrid, Spain
| | - Antonio Serrano
- Servicio de Inmunología, Instituto de Investigacion Hospital Universitario 12 de Octubre, Avenida Córdoba s/n, 28041 Madrid, Spain
- Sección de Inmunología, Universidad San Pablo-CEU, Campus de Monteprincipe, 28668 Madrid, Spain
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Murthy V, Willis R, Romay-Penabad Z, Ruiz-Limón P, Martínez-Martínez LA, Jatwani S, Jajoria P, Seif A, Alarcón GS, Papalardo E, Liu J, Vilá LM, McGwin G, McNearney TA, Maganti R, Sunkureddi P, Parekh T, Tarantino M, Akhter E, Fang H, Gonzalez EB, Binder WR, Norman GL, Shums Z, Teodorescu M, Reveille JD, Petri M, Pierangeli SS. Value of isolated IgA anti-β2 -glycoprotein I positivity in the diagnosis of the antiphospholipid syndrome. ACTA ACUST UNITED AC 2014; 65:3186-93. [PMID: 23983008 DOI: 10.1002/art.38131] [Citation(s) in RCA: 82] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2012] [Accepted: 08/06/2013] [Indexed: 11/12/2022]
Abstract
OBJECTIVE To examine the prevalence of isolated IgA anti-β2 -glycoprotein I (anti-β2 GPI) positivity and the association of these antibodies, and a subgroup that bind specifically to domain IV/V of β2 GPI, with clinical manifestations of the antiphospholipid syndrome (APS) in 3 patient groups and to evaluate the pathogenicity of IgA anti-β2 GPI in a mouse model of thrombosis. METHODS Patients with systemic lupus erythematosus (SLE) from a multiethnic, multicenter cohort (LUpus in MInorities, NAture versus nurture [LUMINA]) (n = 558), patients with SLE from the Hopkins Lupus Cohort (n = 215), and serum samples referred to the Antiphospholipid Standardization Laboratory (APLS) (n = 5,098) were evaluated. IgA anti-β2 GPI titers and binding to domain IV/V of β2 GPI were examined by enzyme-linked immunosorbent assay (ELISA). CD1 mice were inoculated with purified IgA anti-β2 GPI antibodies, and surgical procedures and ELISAs were performed to evaluate thrombus development and tissue factor (TF) activity. RESULTS A total of 198 patients were found to be positive for IgA anti-β2 GPI isotype, and 57 patients were positive exclusively for IgA anti-β2 GPI antibodies. Of these, 13 of 23 patients (56.5%) in the LUMINA cohort, 17 of 17 patients (100%) in the Hopkins cohort, and 10 of 17 patients (58.9%) referred to APLS had at least one APS-related clinical manifestation. Fifty-four percent of all the IgA anti-β2 GPI-positive serum samples reacted with domain IV/V of anti-β2 GPI, and 77% of those had clinical features of APS. Isolated IgA anti-β2 GPI positivity was associated with an increased risk of arterial thrombosis (P < 0.001), venous thrombosis (P = 0.015), and all thrombosis (P < 0.001). The association between isolated IgA anti-β2 GPI and arterial thrombosis (P = 0.0003) and all thrombosis (P = 0.0003) remained significant after adjusting for other risk factors for thrombosis. In vivo mouse studies demonstrated that IgA anti-β2 GPI antibodies induced significantly larger thrombi and higher TF levels compared to controls. CONCLUSION Isolated IgA anti-β2 GPI-positive titers may identify additional patients with clinical features of APS. Testing for these antibodies when other antiphospholipid tests are negative and APS is suspected is recommended. IgA anti-β2 GPI antibodies directed to domain IV/V of β2 GPI represent an important subgroup of clinically relevant antiphospholipids.
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Clinical significance of IgA anti-cardiolipin and IgA anti-β2glycoprotein I antibodies. Curr Rheumatol Rep 2013; 15:343. [PMID: 23754504 DOI: 10.1007/s11926-013-0343-1] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
IgA antiphospholipid antibodies (aPL) are not currently recognized as formal laboratory criteria for the Antiphospholipid Syndrome (APS). This is mainly due to methodological issues (different study designs, use of various non-standardized IgA assays). However, there are experimental data showing the pathogenic role of IgA anti-cardiolipin antibodies (aCL) and IgA anti-β2glycoprotein I antibodies (anti-β2GPI). Isolated IgA aCL are not very common, therefore their testing could be useful in the case of strong suspicion of APS but negative results for other aPL tests. IgA anti-β2GPI seem to be the most prevalent isotype in patients with Systemic Lupus Erythematosus (SLE), with a significant association with thrombotic events. Such a clinical relevance has been recently recognized by the inclusion of these autoantibodies among the aPL tests in the novel SLICC classification criteria for SLE. Emerging interest has been raised by IgA anti-β2GPI against domain 4/5 as a novel subgroup of clinically relevant aPL.
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15
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Nayfe R, Uthman I, Aoun J, Saad Aldin E, Merashli M, Khamashta MA. Seronegative antiphospholipid syndrome. Rheumatology (Oxford) 2013; 52:1358-67. [PMID: 23502076 DOI: 10.1093/rheumatology/ket126] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
APS is an autoimmune disease that leads to arterial and/or venous thrombosis, recurrent pregnancy loss and persistently positive aPLs. Patients with clinical manifestations highly suggestive of APS but persistently negative conventional aPLs are classified as having seronegative APS. Ongoing research has revealed the existence of non-criteria antibodies proposed to be relevant to APS and that can be potentially included in the disease's classification criteria. We present a literature review on the most promising antibodies of this heterogeneous aPL family, which includes antibodies to a zwitterionic phospholipid, namely phosphatidylethanolamine, phospholipid-binding plasma proteins, phospholipid-protein complexes and anionic phospholipids other than cardiolipin. Although these molecules can increase the diagnostic yield of APS, their clinical relevance is still debatable and needs to be confirmed by interlaboratory efforts toward standardizing diagnostic tools, in addition to experimental data and larger longitudinal studies.
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Affiliation(s)
- Rabih Nayfe
- Department of Internal Medicine, American University of Beirut Medical Center, PO Box 11-0236, Riad El-Solh, Beirut 1107 2020, Lebanon
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16
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Athanasiadis G, Sabater-Lleal M, Buil A, Souto JC, Borrell M, Lathrop M, Watkins H, Almasy L, Hamsten A, Soria JM. Genetic determinants of plasma β₂-glycoprotein I levels: a genome-wide association study in extended pedigrees from Spain. J Thromb Haemost 2013; 11:521-8. [PMID: 23279374 DOI: 10.1111/jth.12120] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2012] [Accepted: 12/20/2012] [Indexed: 11/30/2022]
Abstract
BACKGROUND β2 -Glycoprotein I (β2 -GPI), also designated apolipoprotein H, is a 50-kDa protein that circulates in blood at high concentrations, playing important roles in autoimmune diseases, hemostasis, atherogenesis, and angiogenesis, as well as in host defense against bacteria and in protein/cellular waste removal. Plasma β2 -GPI levels have a significant genetic component (heritability of ~ 80%). OBJECTIVES To present the results of a genome-wide association study for plasma β2 -GPI levels in a set of extended pedigrees from the Genetic Analysis of Idiopathic Thrombophilia (GAIT) Project. PATIENTS/METHODS A total of 306 individuals for whom β2 -GPI plasma measurements were available were typed for 307,984 single-nucleotide polymorphisms (SNPs) with the Infinium 317k Beadchip (Illumina). Association with the β2 -GPI phenotype was investigated through variance component analysis, and the most significant results were followed up for association with coronary artery disease (CAD) in an independent in silico analysis involving 5765 CAD cases from the PROCARDIS Project and 7264 controls from the PROCARDIS Project and the Wellcome Trust Case Control Consortium (WTCCC) collection. RESULTS After correction for multiple testing, three SNPs located in/around two genes (ELF5 and SCUBE2) reached genome-wide significance. Moreover, an SNP in the APOH gene showed suggestive association with the β2 -GPI phenotype. Some of the identified genes are plausible biological candidates, as they are actually or potentially involved in inflammatory processes. CONCLUSIONS Our results represent a first step towards identifying common variants reflecting the genetic architecture influencing plasma β2 -GPI levels, and warrant further validation by functional experiments, as the functions of some of the discovered loci are still unknown.
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Affiliation(s)
- G Athanasiadis
- Unit of Genomics of Complex Diseases, Research Institute, Hospital de Santa Creu i Sant Pau, Barcelona, Spain
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Mullen MT, Messé SR, Kasner SE, Sansing L, Husain MR, Norman GL, Shums Z, Cucchiara BL. Anti-Phosphatidylserine-Prothrombin Antibodies are Associated with Outcome in a TIA Cohort. Front Neurol 2012; 3:137. [PMID: 23060855 PMCID: PMC3460224 DOI: 10.3389/fneur.2012.00137] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2012] [Accepted: 09/10/2012] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Antiphospholipid antibodies (aPLs) have been associated with thrombosis in the antiphospholipid antibody syndrome (APS) and with atherosclerotic vascular events in patients without APS. We examined the significance of aPLs in transient ischemic attack (TIA). PATIENTS/METHODS Patients with TIA <48 h from symptom onset were prospectively enrolled. Traditional aPLs, including anticardiolipin and β2-glycoprotein-I (β2GPI), and newer aPLs, including anti-phosphatidylserine/prothrombin (aPS/PT), β2GPI Domain 4/5 and β2GPI Domain 1 were measured. Primary outcome was a composite of stroke or death within 90 days or identification of a high risk stroke mechanism. Secondary outcomes were stroke or death and the presence of clinical/sub-clinical atherosclerosis. RESULTS Over 4.5 years, 167 patients were enrolled. Forty one patients (25%) had the composite endpoint. Antibodies were measured in 158 subjects. aPS/PT IgG antibodies were significantly associated with stroke/death (OR 16.3, 95% CI 2.3-116.7, p = 0.005) and were non-significantly associated with the composite endpoint (OR 4.7, 95% CI 0.8-29.2, p = 0.10). In multivariate analysis adjusting for ABCD(2) risk score, aPS/PT IgG remained associated with stroke/death (OR 15.7, 95% CI 2.0-125.6, p = 0.009). Other aPLs were not associated with clinical outcome and no association between APLs and atherosclerosis was identified. CONCLUSION In contrast to other aPLs, aPS/PT IgG antibodies are independently associated with stroke or death in patients with TIA.
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Affiliation(s)
- Michael T Mullen
- Department of Neurology, University of Pennsylvania Philadelphia, PA, USA
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18
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The clinical relevance of IgA anticardiolipin and IgA anti-β2 glycoprotein I antiphospholipid antibodies: a systematic review. Autoimmun Rev 2012; 12:421-5. [PMID: 22951216 DOI: 10.1016/j.autrev.2012.08.002] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2012] [Accepted: 08/03/2012] [Indexed: 11/20/2022]
Abstract
The antiphospholipid syndrome (APS) is diagnosed in patients with thromboembolic events and/or pregnancy loss in the presence of persistent laboratory evidence for antiphospholipid antibodies (aPL). Diagnostic tests for the detection of antiphospholipid antibodies include laboratory assays that detect anticardiolipin antibodies, lupus anticoagulants, and anti-β(2)-glycoprotein I antibodies. Most studies on aPL have mainly focused on the estimation of the IgG and IgM isotypes, with only a few studies reporting on the pathogenic significance of IgA aPL. In this review we aimed to summarize and analyze the evidence published in the literature on the prevalence and the clinical significance of IgA aPL.
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IgA antibodies against β2 glycoprotein I in hemodialysis patients are an independent risk factor for mortality. Kidney Int 2012; 81:1239-44. [PMID: 22358146 DOI: 10.1038/ki.2011.477] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Cardiovascular complications are the most important cause of death in patients on dialysis with end-stage renal disease. Antibodies reacting with β-glycoprotein I seem to play a pathogenic role in antiphospholipid syndrome and stroke and are involved in the origin of atherosclerosis. Here we evaluated the presence of anticardiolipin and anti-β-glycoprotein I antibodies together with other vascular risk factors and their relationship with mortality and cardiovascular morbidity in a cohort of 124 hemodialysis patients prospectively followed for 2 years. Of these, 41 patients were significantly positive for IgA anti-β-glycoprotein I, and the remaining had normal values. At 24 months, overall and cardiovascular mortality and thrombotic events were all significantly higher in patients with high anti-β-glycoprotein I antibodies. Multivariate analysis using Cox regression modeling found that age, hypoalbuminemia, use of dialysis catheters, and IgA β-glycoprotein I antibodies were independent risk factors for death. Thus, IgA antibodies to β-glycoprotein I are detrimental to the clinical outcome of hemodialysis patients.
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Abstract
β(2) -Glycoprotein I (β(2) -GPI) is a protein that circulates in blood at high concentrations. The function of β(2) -GPI has long been an enigma. More than 20 years ago, it was discovered that β(2) -GPI is the major antigen for the circulating antibodies in the antiphospholipid syndrome. However, this knowledge has not advanced our understanding of the physiologic role of the protein. In recent years, new insights have suggested an important function of this protein in innate immunity. β(2) -GPI was found to scavenge lipopolysaccharide and was able to clear unwanted anionic cellular remnants such as microparticles from the circulation. The function of β(2) -GPI seems to depend on the structural conformation of the protein, and it has been established that β(2) -GPI can exist in at least two conformations. In this review, we will highlight and summarize the current knowledge on this protein.
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Affiliation(s)
- P G de Groot
- Department of Clinical Chemistry and Hematology, University Medical Center, Utrecht, the Netherlands.
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Bertolaccini ML, Amengual O, Atsumi T, Binder WL, de Laat B, Forastiero R, Kutteh WH, Lambert M, Matsubayashi H, Murthy V, Petri M, Rand JH, Sanmarco M, Tebo AE, Pierangeli SS. 'Non-criteria' aPL tests: report of a task force and preconference workshop at the 13th International Congress on Antiphospholipid Antibodies, Galveston, TX, USA, April 2010. Lupus 2011; 20:191-205. [PMID: 21303836 DOI: 10.1177/0961203310397082] [Citation(s) in RCA: 122] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Abstract: Current classification criteria for definite APS recommend the use of one or more of three positive standardized laboratory assays, including anticardiolipin antibodies (aCL), lupus anticoagulant (LA), and antibodies directed to β(2)glycoprotein I (anti-β(2)GPI) to detect antiphospholipid antibodies (aPL) in the presence of at least one of the two major clinical manifestations (i.e., thrombosis or pregnancy morbidity) of the syndrome. Several other autoantibodies shown to be directed to phospholipids and/or their complexes with phospholipids and/or to proteins of the coagulation cascade, as well as a mechanistic test for resistance to annexin A5 anticoagulant activity, have been proposed to be relevant to APS. A task force of worldwide scientists in the field discussed and analyzed critical questions related to 'non-criteria' aPL tests in an evidence-based manner during the 13th International Congress on Antiphospholipid Antibodies (APLA 2010, 13-16 April 2010, Galveston, Texas, USA). This report summarizes the findings, conclusions, and recommendations of this task force.
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Affiliation(s)
- M L Bertolaccini
- Lupus Research Unit, The Rayne Institute, King's College London School of Medicine, London, UK.
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Devanarayan V, Scholand MB, Hoidal J, Leppert MF, Crackower MA, O'Neill GP, Gervais FG. Identification of distinct plasma biomarker signatures in patients with rapid and slow declining forms of COPD. COPD 2010; 7:51-8. [PMID: 20214463 DOI: 10.3109/15412550903499530] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Chronic obstructive pulmonary disease (COPD) is a prevalent pulmonary disease characterized by a progressive decline in lung function. The identification of biomarkers capable of predicting the rate of lung function decline or capable of giving an early read on drug efficacy in clinical trials would be very useful. The aim of this study was to identify plasma biomarkers capable of accurately distinguishing patients with COPD from healthy controls. Eighty-nine plasma markers in 40 COPD patients and 20 healthy smoker controls were analyzed. The COPD patients were divided into two subgroups, rapid and slow decliners based on their rate of lung function decline measured over 15 years. Univariate analysis revealed that 25 plasma markers were statistically different between rapid decliners and controls, 4 markers were different between slow decliners and controls, and 10 markers were different between rapid and slow decliners (p < 0.05). Multivariate analysis led to the identification of groups of plasma markers capable of distinguishing rapid decliners from controls (signature 1), slow decliners from controls (signature 2) and rapid from slow decliners (signature 3) with over 90% classification accuracy. Importantly, signature 1 was shown to be longitudinally stable using plasma samples taken a year later from a subset of patients. This study describes a novel set of plasma markers differentiating slow from rapid decline of lung function in COPD. If validated in distinct and larger cohorts, the signatures identified will have important implications in both disease diagnosis, as well as the clinical evaluation of new therapies.
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Mayer M, Cerovec M, Rados M, Cikes N. Antiphospholipid syndrome and central nervous system. Clin Neurol Neurosurg 2010; 112:602-8. [PMID: 20417026 DOI: 10.1016/j.clineuro.2010.03.023] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2010] [Accepted: 03/23/2010] [Indexed: 12/01/2022]
Abstract
Classification criteria, etiology, pathogenesis, major central nervous system (CNS) manifestations of the antiphospholipid syndrome (APS), as well as diagnostic and therapeutic approach are discussed in the article, supported by several MRI findings to illustrate differential complexity of selected topics. Close interplay of inflammation, autoimmunity, coagulation cascade, vasculature bed, neuron physiology and demyelinization in APS is elaborated. Cerebrovascular disease, multiple sclerosis-like syndrome, seizures, cognitive disfunction, headache and migraine, chorea and catastrophic antiphospholipid syndrome (CAPS) are discussed as the most prominent CNS manifestations of the APS.
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Affiliation(s)
- Miroslav Mayer
- University Hospital Center Zagreb, University of Zagreb, School of Medicine, Department of Medicine, Division of Clinical Immunology and Rheumatology, Kispaticeva ulica 12, Zagreb, Croatia.
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Abstract
Antiphospholipid syndrome is diagnosed when arterial or venous thrombosis or recurrent miscarriages occur in a person in whom laboratory tests for antiphospholipid antibodies (anticardiolipin antibodies and/or lupus anticoagulant and/or anti-beta 2-glycoprotein I) are positive. Despite the strong association between antiphospho-lipid antibodies and thrombosis, their pathogenic role in the development of thrombosis has not been fully elucidated. Novel mechanisms involving both the complement pathway and micro-particles have been described. The knowledge of these new pathogenic approaches might identify novel therapeutic targets and therefore may improve the management of these patients.
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Affiliation(s)
- Gerard Espinosa
- Department of Autoimmune Diseases, Institut Clínic de Medicina i Dermatologia, Hospital Clínic, Barcelona, Catalonia, Spain.
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Sitia S, Atzeni F, Sarzi-Puttini P, Di Bello V, Tomasoni L, Delfino L, Antonini-Canterin F, Di Salvo G, De Gennaro Colonna V, La Carrubba S, Carerj S, Turiel M. Cardiovascular involvement in systemic autoimmune diseases. Autoimmun Rev 2008; 8:281-6. [PMID: 18817899 DOI: 10.1016/j.autrev.2008.08.004] [Citation(s) in RCA: 78] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2008] [Accepted: 08/25/2008] [Indexed: 10/21/2022]
Abstract
Autoimmune diseases, including rheumatoid arthritis (RA), systemic lupus erythematosus (SLE), primary antiphospholipid syndrome (APS), systemic sclerosis and systemic vasculitis, affect a large number of people in whom one of the leading causes of morbidity and mortality is cardiovascular disease. Cardiovascular disease is associated with the development of accelerated atherosclerosis. It seems to occur at a younger age than in the general population, is often asymptomatic and, in addition to traditional risk factors, also involves specific risk factors as chronic inflammation, the duration and activity of the autoimmune disease, and immunosuppressive therapy. The early phases of cardiovascular involvement in patients with autoimmune diseases may be clinically silent, with only a microcirculation disorder present. There are various means of detecting morphological cardiac damage: coronary angiography remains the gold standard for diagnosing coronary stenosis, but new, non invasive and more reliable methods have been introduced into clinical practice in order to detect subclinical microcirculation abnormalities.
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Affiliation(s)
- Simona Sitia
- IRCCS Orthopedic Galeazzi Institute, University of Milan, Department of Health Technologies, Cardiology Unit, Milan, Italy
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Qian K, Xie F, Gibson AW, Edberg JC, Kimberly RP, Wu J. Functional expression of IgA receptor FcalphaRI on human platelets. J Leukoc Biol 2008; 84:1492-500. [PMID: 18784345 DOI: 10.1189/jlb.0508327] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
FcalphaRI (CD89) is a human IgA FcR expressed on cells of myeloid lineage such as neutrophils, monocytes, tissue macrophages, eosinophils, and subpopulations of dendritic cells. FcalphaRI mediates cell activation through Src family kinases and downstream tyrosine-based phosphorylation pathways. However, the role of IgA and the expression and role of its cognate receptor FcalphaRI (CD89) in platelet activation are undefined. In the current study, we demonstrate that human platelets express FcalphaRI mRNAs and proteins. Furthermore, we show that the platelet FcalphaRI is associated with the FcR gamma-chain, and cross-linking of FcalphaRI leads to Syk phosphorylation. Clustering of FcalphaRI induces pre-mRNA splicing and protein production of tissue factor and IL-1beta, suggesting novel roles for human platelet FcalphaRI and serum IgA in thrombosis and inflammation.
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Affiliation(s)
- Kun Qian
- Division of Clinical Immunology and Rheumatology, Department of Medicine, University of Alabama at Birmingham, 202 Shelby Interdisciplinary Biomedical Science Building, 1825 University Boulevard, Birmingham, AL 35294-2182, USA
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27
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Gabeta S, Norman GL, Gatselis N, Liaskos C, Papamichalis PA, Garagounis A, Zachou K, Rigopoulou EI, Dalekos GN. IgA anti-b2GPI antibodies in patients with autoimmune liver diseases. J Clin Immunol 2008; 28:501-11. [PMID: 18551357 DOI: 10.1007/s10875-008-9211-6] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2008] [Accepted: 05/19/2008] [Indexed: 12/16/2022]
Abstract
INTRODUCTION Recently, we reported a high prevalence of immunoglobulin G and/or immunoglobulin M anticardiolipin antibodies (aCL) in patients with autoimmune liver diseases, namely, autoimmune hepatitis (AIH), primary biliary cirrhosis (PBC), and primary sclerosing cholangitis (PSC), which were independent of the respective isotypes of antibodies against beta2-glycoprotein I (anti-b2GPI). Immunoglobulin A (IgA) aCL and IgA anti-b2GPI are the least studied of the three specific isotypes either in antiphospholipid syndrome (APS) or in other conditions. METHODS Therefore, we investigated the prevalence and clinical significance of IgA anti-b2GPI and IgA aCL by enzyme-linked immunosorbent assays in another set of Caucasian patients with autoimmune liver diseases (59 AIH, 96 PBC, and 37 PSC). The disease controls group consisted of 50 hepatitis C virus (HCV) patients, 50 hepatitis B virus (HBV), 30 alcoholic liver disease (ALD), 30 non-alcoholic steatohepatitis (NASH), and 110 healthy controls. RESULTS AND DISCUSSION IgA anti-b2GPI prevalence was higher in AIH (50.8%) compared to PBC (p = 0.005), PSC (p = 0.008), NASH (p = 0.004), ALD (p = 0.01), and HCV (p = 0.002). The titers were also significantly higher in AIH compared to any other group of the study. IgA aCL prevalence was higher in AIH (33.9%) compared to PBC (p = 0.005), PSC (p = 0.014), NASH (p = 0.001), ALD (p = 0.004), and HCV (p < 0.001). IgA anti-b2GPI or IgA aCL were not associated with APS features in patients with liver autoimmunity. Of note, IgA anti-b2GPI and IgA aCL were associated with clinical and biochemical markers of disease severity in AIH and PBC. We demonstrated a high prevalence and high titers of IgA anti-b2GPI in patients with AIH compared to any other liver disease of the study. CONCLUSION IgA anti-b2GPI and IgA aCL were associated with the severity and biochemical activity of AIH and PBC, but long-term prospective studies are needed to address whether this new finding is of clinical importance in AIH and PBC patients.
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Affiliation(s)
- Stella Gabeta
- Department of Medicine, Research Laboratory of Internal Medicine, Medical School, University of Thessaly, Larissa, Greece
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Abstract
Systemic lupus erythematosus (SLE) is a chronic autoimmune disease, characterized by multisystemic involvement. Late onset SLE represents a specific sub-group of the disorder, beginning above 50-65 years of age. The incidence of late onset SLE ranges in the interval of 12-18% and the course of the disease is considered to be more benign. According to several authors, skin manifestations, photosensitivity, arthritis and nephritis, occur rarely in the elderly patients with late SLE onset; prevalence of serositis, lung involvement and Sjögren's syndrome were observed more often. Late onset SLE patients manifested higher rate of positive findings of rheumatoid factors, as well as of anti-Ro and anti-La antibodies; and the lower occurrence of anti-RNP antibodies and hypocomplementaemia. A slow onset of the disorder, non-specific manifestations at the beginning of the illness and less frequent prevalence of SLE in the elderly often result in late diagnosis. Treatment of the disease depends on its clinical manifestations. NSAID's, antimalarials or low doses of glucocorticoids are used for the less severe forms. Immunosuppressives and higher doses of glucocorticoids are the treatments of choice for more severe organ involvements and complications. A multidisciplinary approach is recommended for the treatment of late onset SLE patients.
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Affiliation(s)
- J Rovenský
- National Institute of Rheumatic Diseases, 92101 Piest'any, Slovak Republic.
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Baldini C, Giusti L, Bazzichi L, Lucacchini A, Bombardieri S. Proteomic analysis of the saliva: a clue for understanding primary from secondary Sjögren's syndrome? Autoimmun Rev 2007; 7:185-91. [PMID: 18190876 DOI: 10.1016/j.autrev.2007.11.002] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The clinical entity of secondary Sjögren's syndrome (SS) is controversial and the relationship with primary SS and other systemic autoimmune diseases is still far from being completely understood. In the last few years, proteomic approaches have been applied with a growing interest in the search for diagnostic biomarkers for many rheumatic diseases and it is possible that, in the near future, proteomic analysis of human saliva could help in distinguishing also primary from secondary SS. This review summarizes the state of the art of proteomic analysis of human saliva in the diagnosis of connective diseases focusing its advantages, limits and future perspectives.
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Affiliation(s)
- Chiara Baldini
- Department of Internal Medicine, Rheumatology Unit, University of Pisa, Via Roma 67, 56126 Pisa, Italy
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