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Analyses of Proteinuria, Renal Infiltration of Leukocytes, and Renal Deposition of Proteins in Lupus-prone MRL/lpr Mice
Published on: June 8, 2022
Role of mycophenolate mofetil in the treatment of lupus nephritis
L Grcevska1, M Milovanceva Popovska, S Dzikova
1Department of Nephrology, Vodnjanska 17, Skopje, Republic of Macedonia.
Abstract:
Mycophenolate mofetil (MMF) is an immunosuppressive drug successfully used for the prevention of acute and chronic rejection of renal allografts, as well as in the therapy of glomerular disorders. We treated three groups of patients with lupus nephritis: the first group of patients had a high histologic activity index (AI), 13.4 +/- 2.34; the second group of patients had a high histologic chronicity index (CI), 6.0 +/- 0.7; and the third group consisted of only two patients, one with low AI (3.5) and another with low CI (1.5). The patients were treated for 2 years. MMF was initiated at a dose of 2 g/daily for the first 6 months and the dose was decreased to 1.5 g/daily for the further 18 months. Steroids, 0.4 mg/kg/day, were the concomitant therapy for the first 6 months, with slow tapering for the further 18 months. Patients with high AI presented significant decrease of serum creatinine after 2 years, 286 +/- 112.95 to 131.2 +/- 44.65 micromol/L. Two of the patients, with acute oligoanuria, were withdrawn from dialysis treatment. Significant improvement was also noted, 6.97 +/- 1.81 to 0.9 +/- 0.31 g/day. Patients with high CI had nonsignificant decrease of serum creatinine, 178.5 +/- 47.73 to 129.25 +/- 22.88 micromol/L, and significant improvement of proteinuria, 4.63 +/- 1.57 to 1.14 +/- 0.39 g/day. The patient with low AI showed recovery of renal function (serum creatinine from 196 to 72 micromol/L) and alleviation of proteinuria, 7.93 to 3.4 g/day. The patient with low CI did not respond to the therapy and renal function slowly worsened. MMF has emerged as a promising therapeutic approach for both the induction and maintenance phase in patients with lupus nephritis.
Insights
Mycophenolate mofetil (MMF) shows promise in treating lupus nephritis, improving kidney function and reducing proteinuria in patients with high disease activity. Some patients with severe symptoms were even able to stop dialysis.
Area of Science:
- Nephrology
- Immunology
- Pharmacology
Background:
- Mycophenolate mofetil (MMF) is an established immunosuppressant for preventing organ transplant rejection and treating glomerular disorders.
- Lupus nephritis, a severe complication of systemic lupus erythematosus, requires effective therapeutic strategies to manage kidney inflammation and damage.
Purpose of the Study:
- To evaluate the efficacy of Mycophenolate mofetil (MMF) in patients with lupus nephritis over a 2-year treatment period.
- To assess the impact of MMF on renal function and proteinuria in lupus nephritis patients with varying degrees of histologic activity and chronicity.
Main Methods:
- Three groups of lupus nephritis patients were treated with MMF (2 g/day initially, then 1.5 g/day) and steroids for 2 years.
- Patients were stratified based on high histologic activity index (AI) or high chronicity index (CI), with a smaller group having low AI/CI.
- Renal function (serum creatinine) and proteinuria levels were monitored throughout the study.
Main Results:
- Patients with high AI showed significant reductions in serum creatinine and proteinuria; two patients with acute oligoanuria were withdrawn from dialysis.
- Patients with high CI demonstrated significant improvement in proteinuria, though the decrease in serum creatinine was not statistically significant.
- One patient with low AI experienced renal function recovery and reduced proteinuria, while the patient with low CI showed no improvement.
Conclusions:
- Mycophenolate mofetil (MMF) is a promising therapeutic option for lupus nephritis, particularly effective in patients with high disease activity.
- MMF demonstrates benefits in improving renal function and reducing proteinuria, offering potential for dialysis withdrawal in select cases.
- Treatment outcomes vary based on histologic indices, suggesting MMF's efficacy is linked to the specific disease characteristics of lupus nephritis.
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