Membranoproliferative GN without an infectious trigger is most commonly treated with which approach?

• A. ACE inhibitors alone
• B. Diuretics alone
• C. Rituximab
• D. Steroids

Answer: (D)

Membranoproliferative GN without an infectious trigger is driven by immune-mediated injury in the glomerulus. The best way to address this underlying process is to dampen the immune response, and corticosteroids are the mainstay because they broadly suppress inflammatory and immune activity within the kidney. This can reduce mesangial proliferation and immune complex–mediated damage, helping to decrease proteinuria and protect kidney function.

Supportive measures like ACE inhibitors or ARBs help control blood pressure and reduce proteinuria, but they don’t modify the immune process itself. Diuretics manage edema, not the disease driving glomerular injury. Rituximab is used in select B-cell–driven or cryoglobulinemia-associated cases and isn’t the standard first-line therapy for idiopathic noninfectious MPGN. So, steroids are the most appropriate initial approach in this scenario.