Mycophenolate Mofetil (MMF) in Patients With IgA Nephropathy (IgAN)

In the ARB lead-in phase, each subject will be on a strict sodium-restricted diet ( \< 5 g NaCl/day), and then given a stable dose (150mg \~ 300mg/day) of irbesartan (Aprovel) for 3 months until reaching the target blood pressure (BP) level of ≤ 125/75 mmHg. Patients will continue ARB treatment in the drug treatment phase and at lease 3 years in the follow-up phase.

Patients will take oral Pred ( 0.5 mg/kg/d) on alternate days, and on the first, third and fifth months of the drug treatment phase, patients will be given intravenous pulse therapy with methylprednisolone ( 0.5 g/day) for 3 successive days. And after 6 months, Pred should be tapered to be stopped until the end of the 12-month course of treatment.

Patients will take MMF 1.0g bid (wt ≥ 50kg) or 0.75g bid (wt \< 50kg) for the first 6-month of drug treatment phase, then to 0.5 bid (wt ≥ 50kg) for the remaining 6-month.