Alternative therapy for lupus nephritis

Apr 15, 2009

Lupus is a rare but serious disease that mainly affects women of child-bearing age and occurs when the body's immune system goes awry, damaging a variety of organs. When kidneys are targeted, patients develop lupus nephritis, which can result in kidney failure and death. Lupus nephritis is often treated with the cancer drug cyclophosphamide, which suppresses the immune system but also causes hair loss, nausea, vomiting, and infertility.

The immunosuppressant drug mycophenolate mofetil is less commonly used than cyclophosphamide, but may be an attractive alternative for some patients, according to a study appearing in the May 2009 issue of the Journal of the American Society of Nephrology (JASN).

Recent studies have suggested that oral mycophenolate mofetil (commonly used to prevent graft rejection after organ transplants), may offer advantages over intravenous cyclophosphamide. To test this hypothesis, Neil Solomons, MD (Aspreva Pharmaceuticals Corporation, Canada), and other researchers designed one of the largest, most racially diverse trials ever conducted in patients. The researchers recruited 370 patients from 88 centers in 20 countries; patients received either cyclophosphamide or mycophenolate mofetil for 24 weeks.

By the end of the treatment schedule, the investigators did not detect a significantly different response rate between the two groups of patients: 104 out of 185 (56.2%) patients responded to mycophenolate mofetil compared with 98 out of 185 (53.0%) to cyclophosphamide. There were nine deaths in the mycophenolate mofetil group and five in the cyclophosphamide group, but there was no significant difference between the groups with respect to the rates of adverse events.

Both treatments are likely to improve nephritis patients' health and one therapy cannot be deemed superior to the other. However, researchers noted important differences across racial and ethnic groups, with more high-risk, non-Caucasian, non-Asian patients responding better to mycophenolate mofetil than to cyclophosphamide. Also, some lupus nephritis patients may prefer mycophenolate mofetil therapy since it does not affect fertility.

The study's data "will allow clinicians to gain a unique insight into the efficacy and safety of these commonly used therapies in the treatment of renal and non-renal lupus in a racially diverse population," said Ellen Ginzler, MD (SUNY-Downstate Medical Center), the principal US investigator for the ALMS study group.

More information: The article, entitled "Mycophenolate Mofetil versus Cyclophosphamide for Induction Treatment of Lupus Nephritis," will appear online at jasn.asnjournals.org/ on April 15, 2009, doi 10.1681/ASN.2008101028.

Source: American Society of Nephrology (news : web)

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