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  • Title: Evaluation of the clinical relevance of anti-annexin-A5 antibodies in Chinese patients with antiphospholipid syndrome.
    Author: Zhang S, Wu Z, Li J, Wen X, Li L, Zhang W, Zhao J, Zhang F, Li Y.
    Journal: Clin Rheumatol; 2017 Feb; 36(2):407-412. PubMed ID: 28000012.
    Abstract:
    A hallmark feature of antiphospholipid syndrome (APS) is the presence of antiphospholipid antibodies (aPLs). Few studies have addressed the clinical relevance of anti-annexin A5 antibodies (aANXA5) in Chinese patients with APS. In this study, we evaluated the clinical performance of aANXA5 in the diagnosis of APS. Sera from 313 subjects were tested, including 170 samples from patients with APS, 104 samples from patients with non-APS diseases as disease controls (DC), and 39 healthy controls (HC). Serum IgG and IgM aANXA5 were determined by ELISA. Overall, the levels of both IgG and IgM aANXA5 were significantly increased in patients with primary APS (PAPS) and APS associated to other diseases (APSAOD) compared with DC and HC. The sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV) for IgG and IgM aANXA5 in the diagnosis of APS were 33.5 and 15.3, 99.0 and 99.0, 98.3 and 96.3, and 47.7 and 41.7%, respectively. Significant associations between IgG aANXA5 and arterial thrombotic events (OR, 2.60; 95% CI, 1.44-4.71) and between IgG aANXA5 and venous thrombotic events (OR, 2.80; 95% CI, 1.55-5.06) were identified. No correlations were identified between IgG or IgM aANXA5 and obstetric complications. Our data suggest that aANXA5 could serve as a diagnosis biomarker for patients with APS. More importantly, our data highlighted a potential role of IgG aANXA5 in identifying APS patients with high risk of thrombosis.
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