Effectiveness of Mycophenolate Mofetil Combined With Tacrolimus for Steroid Tapering in Systemic Lupus Erythematosus: A Prospective, Random Control, Open-label, Single Center Clinical Trial
The goal of this clinical trial is to determine whether mycophenolate mofetil(MMF) combined with tacrolimus(TAC) can maintain remission in patients with lupus nephritis (LN) who have reached treatment targets after steroid tapering. The main question\[s\] it aims to answer are: * The efficacy, safety and tolerability of MMF combined with TAC regimen in the treatment of LN patients in the maintenance period. * The influence of low-dose steroid on carotid intima thickness (CIMT). * The omics and cell-free RNA (cfRNA) spectral differences related to lupus flare. * The differences in health economics between steroid tapering and steroid maintenance patients. Participants will be randomly assigned into 2 groups. In the steroid tapering group, participants will take MMF+TAC treatment without steroid for 1 year, and participants who stop steroid treatment without lupus flare will be randomly assigned to monotherapy with MMF or TAC. In the steroid maintenance group, participants will take MMF+TAC+steroid for 1 year, and participants without lupus flare will stop the use of steroid for 6 months. Participants without lupus flare after the stop of steroid will be randomly assigned to monotherapy with MMF or TAC.
• Systemic lupus erythematosus participants diagnosed with 2019 American College of Rheumatology/European League Against Rheumatism (ACR/EULAR) classification criteria, fulfilled with American College of Rheumatology (ACR) lupus nephritis definition, and have reached treatment target (accord with lupus nephritis clinical remission and DORIS) for at least 6 months. The target is defined as: (1)24h urine protein ≤0.5g/d；(2)stable of improved renal function (baseline creatinine ±10% or decrease 15%)；(3)clinical SLE Disease Activity Index (cSLEDAI) =0 (all scores are required zero, except hypocomplementemia and anti-dsDNA antibody positivity)；(4)PGA score (Physician Global Assessment)\<0.5; (5)prednisone or equivalent steroid dose≤5mg/d；(6)stable use of immunosuppressants and antimalarial drugs; (7)no use of biological agents.
• According to the physician, the participant can accept this treatment.
• The participant is willing to join this clinical trial, has good compliance, and could understand and sign the informed consent before the study begins.