Ro60 Expression in Macrophages in Sjogren's Disease

Inclusion Criteria: * Patients with SSp Subjects aged between 18 and 75, without chronic disease; Subject meeting the classification criteria for SSp; Subject with positive anti-SSA serology; French-speaking subject able to give written consent; Subject affiliated to the Sécurité Sociale or an equivalent scheme; Subject willing to have blood samples taken; * Control subjects Subjects aged between 18 and 75, without chronic disease and not meeting SSp classification criteria; Subject who understands and speaks French and is able to give written consent; Subject affiliated to the French Social Security system or an equivalent scheme; Subject willing to have blood taken; Exclusion Criteria: * Subject receiving current anti-inflammatory treatment (e.g. corticosteroid therapy, non-steroidal anti-inflammatory drugs) or a regimen of more than 1 month within the last 3 months; * Subject undergoing biotherapy or cytoreductive treatment; * Subjects with positive serologies for human immunodeficiency virus (HIV), viral hepatitis B virus (HBV) and viral hepatitis C virus (HCV) in the 3 months preceding the inclusion visit; * Protected persons as defined in articles of the French Public Health Code.