PMID- 15946204 OWN - NLM STAT- MEDLINE DCOM- 20050922 LR - 20230829 IS - 1538-7933 (Print) IS - 1538-7836 (Linking) VI - 3 IP - 6 DP - 2005 Jun TI - The presence of IgG antibodies against beta2-glycoprotein I predicts the risk of thrombosis in patients with the lupus anticoagulant. PG - 1160-5 AB - BACKGROUND: Lupus anticoagulant (LA) is a strong risk factor of thrombosis. However, a subgroup of patients positive for LA is unaffected by thrombosis and currently no predictive markers are available to identify patients positive for LA at increased risk for thrombosis. OBJECTIVE: The aim of the study was to investigate whether anti-beta-2-glycoprotein I (anti-beta2GPI) or anticardiolipin antibodies (ACA) are associated with an increased risk of thrombosis in patients persistently positive for LA. PATIENTS AND METHODS: A cohort of 87 consecutive patients persistently positive for LA was investigated, 55 with and 32 without a history of thrombosis. Immunoglobulin G (IgG) and M (IgM) antibodies against beta2GPI and cardiolipin were determined by enzyme-linked immunoassay. RESULTS: Patients positive for LA with thrombosis had significantly higher levels of anti-beta2GPI IgG (median 16.7 standard units, interquartile range 3.0-75.2, P = 0.002) and of ACA IgG (41.1 IgG phospholipid units per mL, 8.9-109.0, P = 0.002) than those without thrombosis (2.6, 1.4-7.9 and 9.7, 4.6-22.1, respectively). Levels of anti-beta2GPI IgM and ACA IgM did not differ significantly between LA patients with and without thrombosis (P = 0.25 and 0.12, respectively). Elevated anti-beta2GPI IgG was associated with an increased risk for thrombosis (OR = 4.0, 95% CI 1.2-13.1), especially for venous thromboembolism (OR = 5.2, 95% CI 1.5-18.0). CONCLUSIONS: Increased levels of anti-beta2GPI IgG were associated with thrombosis. We conclude that anti-beta2GPI IgG levels above normal predict an increased risk of thrombosis in patients persistently positive for LA. FAU - Zoghlami-Rintelen, C AU - Zoghlami-Rintelen C AD - Division of Haematology and Blood Coagulation, Department of Internal Medicine I, Medical University Vienna, Vienna, Austria. FAU - Vormittag, R AU - Vormittag R FAU - Sailer, T AU - Sailer T FAU - Lehr, S AU - Lehr S FAU - Quehenberger, P AU - Quehenberger P FAU - Rumpold, H AU - Rumpold H FAU - Male, C AU - Male C FAU - Pabinger, I AU - Pabinger I LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - J Thromb Haemost JT - Journal of thrombosis and haemostasis : JTH JID - 101170508 RN - 0 (Antibodies, Anticardiolipin) RN - 0 (Autoantibodies) RN - 0 (Glycoproteins) RN - 0 (Immunoglobulin G) RN - 0 (Lupus Coagulation Inhibitor) RN - 0 (beta 2-Glycoprotein I) SB - IM CIN - J Thromb Haemost. 2005 Jun;3(6):1158-9. PMID: 15946203 MH - Adult MH - Antibodies, Anticardiolipin/blood MH - Autoantibodies/*blood MH - Case-Control Studies MH - Enzyme-Linked Immunosorbent Assay MH - Female MH - Glycoproteins/*immunology MH - Humans MH - Immunoglobulin G/blood MH - Lupus Coagulation Inhibitor/*blood MH - Male MH - Middle Aged MH - *Predictive Value of Tests MH - Risk MH - Thrombosis/etiology/*immunology MH - beta 2-Glycoprotein I EDAT- 2005/06/11 09:00 MHDA- 2005/09/24 09:00 CRDT- 2005/06/11 09:00 PHST- 2005/06/11 09:00 [pubmed] PHST- 2005/09/24 09:00 [medline] PHST- 2005/06/11 09:00 [entrez] AID - S1538-7836(22)16049-6 [pii] AID - 10.1111/j.1538-7836.2005.01394.x [doi] PST - ppublish SO - J Thromb Haemost. 2005 Jun;3(6):1160-5. doi: 10.1111/j.1538-7836.2005.01394.x.