Treatment of systemic lupus erythematosus with bromocriptine.

Prolactin, a lactogenic hormone, is a cytokine and an important link between the immune and endocrine systems. Prolactin stimulated disease in autoimmune NZB/NZW mice. Treatment of the mice with the prolactin-lowering dopamine agonist, bromocriptine, suppressed anti-DNA and prolonged life spans. These findings have been applied to humans with systemic lupus erythematosus (SLE). An open-label study, a double blind study, and a study comparing bromocriptine to hydroxychloroquine provided evidence that bromocriptine therapy reduced flares and suppressed disease activity in SLE.