Semaphorin 3A Levels in Lupus with and without Secondary Antiphospholipid Antibody Syndrome and Renal Involvement.

Objective: The aim of this study is to evaluate semaphorin 3A levels in patients with systemic lupus erythematosus (SLE) with and without renal involvement and secondary antiphospholipid antibody syndrome (APS).

Methods: Patients with SLE were grouped according to the presence of secondary APS or renal involvement. The control group consisted of age-matched, nonsmoking, healthy volunteers.