Antiphospholipid (aPL) antibodies are a wide and heterogeneous group of closely related immunoglobulins that have specificity for a number of phospholipids (PLs), PL-binding proteins, including beta2 glycoprotein I (beta2GP1), prothrombin, and PL-protein complexes. Antiphospholipid antibodies are currently detected by a standard solid-phase immunoassay such as anticardiolipin (aCL) antibodies. Although the association between aCL antibodies and thrombosis is well recognized, their role in stroke pathogenesis, and the possibility that they are an independent stroke risk factors in the general stroke population, remains to be determined. There are other negatively charged PL, largely represented within the cellular membrane and involved in the coagulation. Different studies have demonstrated a positive correlation among other aPL and stroke.
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http://dx.doi.org/10.1081/ceh-120015327 | DOI Listing |
BMC Med
January 2025
Department of Rheumatology, Peking Union Medical College Hospital (PUMCH), Peking Union Medical College and Chinese Academy of Medical Sciences, National Clinical Research Center for Dermatologic and Immunologic Diseases (NCRC-DID), Key Laboratory of Rheumatology and Clinical Immunology, Ministry of Education, No. 1 Shuaifuyuan, Wangfujing Ave, Beijing, 100730, China.
Background: Patients with systemic lupus erythematosus (SLE) suffered from an increasing risk of cardiovascular diseases. In this multi-center prospective study, we aimed to determine the association between antiphospholipid antibodies (aPLs) and future atherosclerotic cardiovascular disease (ASCVD) in SLE.
Methods: In total, 1573 SLE patients were recruited based on the Chinese SLE Treatment and Research group (CSTAR) registry.
J Appl Lab Med
December 2024
ARUP Institute for Clinical and Experimental Pathology, Salt Lake City, UT, United States.
Background: The 2023 American College of Rheumatology and modified Sapporo criteria for antiphospholipid syndrome (APS) recommend ELISA to detect anticardiolipin (aCL) and anti-β2-glycoprotein I (aβ2GP1) IgG/IgM antibodies, focusing on moderate to high levels or exceeding the 99th percentile. This study aims to establish the 99th percentile threshold for anti-phospholipid (aPL) antibodies and compare the diagnostic accuracies of these thresholds with manufacturer cutoffs using 2 methodologies.
Methods: The 99th percentile cutoffs for aPL antibodies from 305 healthy donors were established using Aptiva, Particle-Based Multi-Analyte Technology (PMAT), and QUANTA Lite (QL) ELISA, following nonparametric reference interval estimation.
Proc (Bayl Univ Med Cent)
September 2024
Texas A&M University, Temple, Texas, USA.
A 13-year-old boy was referred to orthopedic surgery for chronic intermittent pain and swelling of the left knee. Initial imaging was consistent with osteochondritis dissecans of the femoral condyle. Follow-up imaging demonstrated unexpected progression, with a mass extending into the notch, replacing the anterior cruciate ligament, and eroding the femoral and tibial condyles.
View Article and Find Full Text PDFClin Exp Rheumatol
December 2024
Laboratoire d'Immunologie, AP-HP, Hôpital Européen Georges Pompidou, Paris; and Inflammation, Complement, and Cancer, Université Paris Cité, INSERM, UMRS 1138, Cordeliers Research Center, Team Paris, France.
Objectives: Antiphospholipid syndrome (APS) is an autoimmune disease combining the occurrence of thrombotic and/or obstetric events with the persistent presence of antiphospholipid antibodies (i.e. lupus anticoagulant (LA), anti-cardiolipin (aCL) and anti-beta-2-glycoprotein I (aβ2GPI) antibodies).
View Article and Find Full Text PDFRheumatology (Oxford)
December 2024
Rheumatology Unit, Department of Medicine, University of Padua, Padua, Italy.
Objectives: The 2023 ACR/EULAR antiphospholipid syndrome (APS) classification criteria distinguish between anticardiolipin (aCL) or anti-β2-glycoprotein I (aβ2GPI) IgG vs IgM isotypes, having isolate IgM positivity a low weight, insufficient for APS classification, and define aCL and aβ2GPI thresholds based on fixed cut-off values. We aimed to assess the performance of the 2023 ACR/EULAR criteria in a cohort of primary vascular APS patients (PAPS), previously classified according to the Sydney criteria. Additionally, we evaluated the risk of thrombotic recurrence in patients re-classified or not according to the new criteria.
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