Introduction:Systemic lupus erythematosus (SLE) is a systemic autoimmune disease with extreme heterogeneity, which sometimes may be life-threatening. Principles of treat to target (T2T) in SLE were put forward more recently, leading to better long-term survival and reduced damage accrual.Areas covered: Lupus low disease activity state (LLDAS) and remission are currently the most widely accepted principal goals of SLE-T2T recommendations. In this article, we will deliver the novel insights into the definitions of LLDAS/remission, attainability, and, most importantly, clinical predictors of LLDAS and remission in SLE.Expert opinion: Since the release of the LLDAS and the framework on definitions of remission in SLE, there has been much evidence of a correlation between target attainment or maintenance and better prognosis. In the meantime, researchers are searching for predictors of target attainment. Noteworthy, prospective randomized trials are lacking worldwide to verify the benefits of T2T in various aspects of SLE. The most essential issue is that the optimal definition of the therapeutic target for SLE remains controversial, particularly regarding the maintenance dose of prednisone, the need for immunosuppressive withdrawal, and the requirement for serologic conversion. How to implement T2T principles in clinical practice also needs further investigation.
Keywords: Systemic lupus erythematosus; lupus low disease activity state; predictors; remission; treat-to-target.