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Mycophenolate is superior to azathioprine as treatment for lupus nephritis, study finds

Date:
November 17, 2011
Source:
University of North Carolina School of Medicine
Summary:
A new large, international study finds that the immunosuppressant drug mycophenolate mofetil is superior to azathioprine, an older immunosuppressant, as a maintenance therapy for lupus nephritis.

A new large, international study finds that the immunosuppressant drug mycophenolate mofetil is superior to azathioprine, an older immunosuppressant, as a maintenance therapy for lupus nephritis.

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"This is a huge step forward for people who suffer from lupus nephritis," said Mary Anne Dooley, MD, MPH, associate professor in the University of North Carolina at Chapel Hill School of Medicine and first author of the study, which is published in the Nov. 17, 2011 issue of the New England Journal of Medicine.

Lupus nephritis is an inflammation of the kidney caused by systemic lupus erythematosus (SLE), a disease of the immune system. Lupus nephritis may cause weight gain, high blood pressure, dark urine, or swelling around the eyes, legs, ankles, or fingers. In some patients the inflammation may be severe enough to cause kidney failure. However, some people with SLE have no symptoms of kidney disease.

The new study adds one more badly needed drug to the arsenal that physicians can use to treat lupus, Dooley said. In addition, it should help persuade health insurance companies to pay for the drug when it is used as maintenance therapy for lupus nephritis. Some insurers have refused to cover it because the drug is not FDA-approved for that indication, she said.

Both mycophenolate mofetil and azathioprine have been FDA-approved since the mid-1990s for use in kidney transplant patients, to help prevent organ rejection. Neither is FDA-approved as a maintenance therapy for lupus nephritis, but their immunosuppressant qualities make them useful for that purpose and physicians have been prescribing them off-label for that indication for many years.

The study included 227 patients who had previously responded well to an earlier round of treatment, called induction therapy. The patients were enrolled at 71 centers in 19 countries in Asia, Australia, Europe, North America, Latin America and South Africa. Researchers followed the patients for three years (36 months), with 116 receiving mycophenolate mofetil twice a day while 111 received azathioprine twice a day.

The results showed that mycophenolate mofetil was superior in virtually every aspect to azathioprine. There was a 16.4 percent treatment failure rate in the mycophenolate group, compared to 32.4 percent in the azathioprine group. Patients responded well to mycophenolate for a longer period of time than patients on azathioprine, and negative side effects were more common with azathioprine.

This study also found that African-American patients in particular responded better to mycophenylate mofetil than to cyclophosphamide (Cytoxan) as an induction therapy and better than azathioprine as a maintenance treatment, Dooley said.

The mycophonolate mofetil used in the study was formulated by Roche and is marketed as CellCept, while the azathioprine was made by GlaxoSmithKline and is sold as Imuran. However, both drugs are now widely available as generics, Dooley said.

The corresponding author of the study is Neil Solomons, MD, of Vifor Pharma Ltd., which markets mycophenolate mofetil for indications other than immunosuppression for kidney transplant patients.


Story Source:

The above story is based on materials provided by University of North Carolina School of Medicine. Note: Materials may be edited for content and length.


Journal References:

  1. Mary Anne Dooley, David Jayne, Ellen M. Ginzler, David Isenberg, Nancy J. Olsen, David Wofsy, Frank Eitner, Gerald B. Appel, Gabriel Contreras, Laura Lisk, Neil Solomons, for the ALMS Group. Mycophenolate versus Azathioprine as Maintenance Therapy for Lupus Nephritis. New England Journal of Medicine, 2011; 365:1886-1895 DOI: 10.1056/NEJMoa1014460
  2. Frιdιric A. Houssiau. Toward Better Treatment for Lupus Nephritis. New England Journal of Medicine, 2011; 365: 1929-1930 DOI: 10.1056/NEJMe1111089

Cite This Page:

University of North Carolina School of Medicine. "Mycophenolate is superior to azathioprine as treatment for lupus nephritis, study finds." ScienceDaily. ScienceDaily, 17 November 2011. <www.sciencedaily.com/releases/2011/11/111116174744.htm>.
University of North Carolina School of Medicine. (2011, November 17). Mycophenolate is superior to azathioprine as treatment for lupus nephritis, study finds. ScienceDaily. Retrieved March 31, 2015 from www.sciencedaily.com/releases/2011/11/111116174744.htm
University of North Carolina School of Medicine. "Mycophenolate is superior to azathioprine as treatment for lupus nephritis, study finds." ScienceDaily. www.sciencedaily.com/releases/2011/11/111116174744.htm (accessed March 31, 2015).

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