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    Stelara Beats Enbrel in Psoriasis Study

    Researchers Say the Newer Drug May Be an Effective Alternative to an Old Standby
    By Joanna Broder
    WebMD Health News
    Reviewed by Louise Chang, MD

    Jan. 13, 2010 -- A recently approved drug, Stelara, is more effective than a more established drug, Enbrel, in treating moderate to severe psoriasis, according to a new study.

    The findings, reported this week in the New England Journal of Medicine, may help patients whose extensive psoriasis is not well-controlled to find an alternative treatment.

    "I think it's pretty clear that Stelara is a dramatically effective drug, one of the most effective drugs we've ever had for psoriasis," Mark Lebwohl, MD, chairman of the dermatology department at Mount Sinai School of Medicine, tells WebMD. Lebwohl's department was one of 67 sites worldwide to participate in the study.

    Both Stelara and Enbrel are biologics -- treatments made up of genetically engineered proteins -- and used to treat patients who have moderate to severe psoriasis that has not responded to traditional systemic therapies such as methotrexate.

    But the two drugs have completely different mechanisms of action. While Enbrel blocks tumor necrosis factor-alpha (TNF-alpha), Stelara targets two inflammatory chemicals, interleukin 12 and interleukin 23, which are involved in the pathogenesis of psoriasis.

    Study researcher Christopher Griffiths, MD, a professor of dermatology at England's University of Manchester Medical School, says if patients taking Enbrel have well-controlled psoriasis, they need not switch to Stelara.

    The study's conclusion "just gives those individuals the reassurance that if for some reason the Enbrel stops working, or wasn't working as effectively as it was at the beginning, that there's a proven, logical alternative therapy that they could switch to."

    In the study, 903 patients with moderate-to-severe plaque psoriasis got either Stelara (high or low dose) or high-dose Enbrel.

    Comparing Enbrel and Stelara

    At week 12 of the study, 65% of patients in the lower-dose Stelara group and almost 71% of those in the higher-dose Stelara group had, at most, minimal signs of their psoriasis, according to their doctors, compared to 49% of patients treated with Enbrel.

    "We've never had a drug that with so few injections worked so well," Lebwohl says. Patients in the Sterlara group got one injection when they started the study and another one four weeks later; patients receiving Enbrel received two injections every week for 12 weeks.

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