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New potential therapeutic target discovered for genetic disorder -- Barth syndrome
Date:3/2/2009

Researchers at NYU Langone Medical Center may have discovered a new targeted intervention for Barth Syndrome (BTHS). BTHS, a sometimes fatal disease, is a serious genetic disorder occurring predominantly in males that leads to infection or heart failure in childhood. The new study entitled, "Role of calcium-independent phospholipase A2 in the pathogenesis of Barth syndrome", was recently published in the Proceedings of the National Academy of Sciences, shows the benefits of targeted intervention with an iPLA2-VIA inhibitor that prevents a major symptom of the disease- cardiolipin deficiency.

"Our research has established a causal role of cardiolipin deficiency in the pathogenesis of Barth syndrome and identified an important enzyme in cardiolipin degradation called iPLA2-VIA as a potential target for therapeutic intervention of the disease," said Mindong Ren, Ph.D., lead investigator of the study and assistant professor of cell biology at NYU Langone Medical Center.

BTHS syndrome is an X-linked genetic cardioskeletal muscle disease resulting in muscle weakness and fatigue in patients. The debilitating disorder is caused by a mutation in the genetic coding of tafazzin, an enzyme of the cardiolipin pathway. Cardiolipin is an essential lipid in the inner membrane of mitochondria responsible for normal cell structure and energy production. BTHS patients exhibit defects in cardiolipin metabolism which help fight infections. The various symptoms of BTHS, in addition to cardiolipin deficiency, include cardiomyopathy (weakness in heart muscle), neutropenia (a reduction in neutrophils or white blood cells that fight bacterial infections), muscle weakness & fatigue (caused by cellular deficiency), growth delay, and increase of organic acids in urine.

In a previous study, NYU researchers documented the characteristics of a tafazzin-deficiency in a Drosophila (fruit fly) model of the disease, showing low and abnormal cardiolipin concent
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Contact: Lauren Woods
lauren.woods@nyumc.org
212-404-3753
NYU Langone Medical Center / New York University School of Medicine
Source:Eurekalert

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