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First treatment of rare immune disease approved by FDA

First treatment of rare immune disease approved by FDA

The U.S. Food and Drug Administration has approved Gamifant(emapalumab-lzsg) which is a first drug specifically for a rare immune disease primary hemophagocytic lymphohistiocytosis, HLH. It will be for the treatment of pediatric and adult patients who have a refractory, recurrent or progressive disease or intolerance with conventional HLH therapy.

The efficacy of Gamifant was studied in a clinical trial of 27 pediatric patients wth median age of 1 year having suspected or confirmed primary HLH with either refractory, recurrent or progressive disease during conventional HLH therapy or who were intolerant of conventional HLH therapy.  The study showed that 63 per cent of patients experienced a response and 70 per cent were able to proceed to stem cell transplant.

The common side effects encountered during trials included infections, hypertension, infusion-related reactions, low potassium, and fever. Patients receiving Gamifant should not receive any live vaccines and should be tested for latent tuberculosis. Patients should be closely monitored and treated promptly for infections while receiving Gamifant.

“Primary HLH is a rare and life-threatening condition typically affecting children and this approval fills an unmet medical need for these patients,” said Richard Pazdur, M.D., director of the FDA’s Oncology Center of Excellence and acting director of the Office of Hematology and Oncology Products in the FDA’s Center for Drug Evaluation and Research. “We are committed to continuing to expedite the development and review of therapies that offer meaningful treatment options for patients with rare conditions.”

HLH is a condition in which the body’s immune cells do not work properly. The cells become overactive releasing molecules, which leads to inflammation. The immune cells start to damage the body’s own organs, including the liver, brain and bone marrow. It can be inherited, which is known as primary or “familial” HLH. It can also have non-inherited causes. People with primary HLH usually develop symptoms within the first months or years of life. Symptoms may include fever, enlarged liver or spleen and decreased number of blood cells.

The FDA granted this application Priority Review and Breakthrough Therapy designation. Gamifant also received Orphan Drug designation, which provides incentives to assist and encourage the development of drugs for rare diseases.The FDA has  granted the approval of Gamifant to Novimmune SA.

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Source: Press Release

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