title: A case-control study on the association of idiopathic recurrent pregnancy loss with autoantibodies against beta2-glycoprotein I and annexin V.
abstract: Whereas antiphospholipid antibodies (aPL) are associated with thrombotic events and recurrent spontaneous abortion (RSA), the contribution of anti-beta2 glycoprotein 1 (beta2GP1) and anti-annexin V antibodies as risk factors for RSA remain poorly understood. We investigated anti-beta2-GPI and anti-annexin V IgM and IgG antibodies as potential risk factors for RSA in 200 women with more than three consecutive idiopathic RSA, and 200 age-matched, healthy, parous women. Pearson's chi squared test analysis showed that while anti-beta2-GPI IgG (P = 0.416) and IgM (P = 0.72) were comparable between patients and controls, elevated anti-annexin V IgG (P = 0.006), but not IgM (P = 0.084), was more pronounced in patients. Higher frequencies of elevated IgG-only (P = 0.005), but not IgM-only (P = 1.000; OR = 6.66), anti-annexin V antibodies were noted among patients. Multinomial regression analysis showed that body-mass index (overweight and obesity; P = 0.008), education status (P < 0.001) and anti-beta2-GPI IgM (P = 0.033), but not IgG (P = 0.723), were associated with early abortion, while anti-beta2-GPI IgG (P = 0.030) and anti-annexin V IgG (P = 0.004) were associated with late RSA. For combined early-late RSA, the only variable selected was education status (P < 0.001), and neither anti-annexin V nor anti-beta2-GPI IgM and IgG was associated with early-late RSA. Accordingly, anti-annexin V and anti-beta2-GPI should be regarded as independent risk markers of RSA.
authors.affiliation: Laboratory of Hematology, Faculty of Pharmacy, University of Monastir, Tunisia.
authors.forename: Walid
authors.initials: W
authors.lastname: Zammiti
authors.forename: Nabil
authors.initials: N
authors.lastname: Mtiraoui
authors.forename: Choumous
authors.initials: C
authors.lastname: Kallel
authors.forename: Eric
authors.initials: E
authors.lastname: Mercier
authors.forename: Wassim Y
authors.initials: WY
authors.lastname: Almawi
authors.forename: Touhami
authors.initials: T
authors.lastname: Mahjoub
mesh_terms: D000026:Abortion, Habitual / Q000276:immunology*; D000328:Adult; D017304:Annexin A5 / Q000276:immunology*; D001323:Autoantibodies / Q000097:blood*; D015415:Biomarkers / Q000097:blood; D016022:Case-Control Studies; D016009:Chi-Square Distribution; D005260:Female; D006023:Glycoproteins / Q000276:immunology*; D006801:Humans; D007074:Immunoglobulin G / Q000097:blood; D007075:Immunoglobulin M / Q000097:blood; D015999:Multivariate Analysis; D011247:Pregnancy; D011264:Pregnancy Trimesters; D012307:Risk Factors; D053482:beta 2-Glycoprotein I
chemical_list: D017304:Annexin A5; D001323:Autoantibodies; D015415:Biomarkers; D006023:Glycoproteins; D007074:Immunoglobulin G; D007075:Immunoglobulin M; D053482:beta 2-Glycoprotein I