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Researchers improve gene therapy technique for children with immune disorder
Date:9/11/2012

By including chemotherapy as a conditioning regimen prior to treatment, researchers have developed a refined gene therapy approach that safely and effectively restores the immune system of children with a form of severe combined immunodeficiency (SCID), according to a study published online today in Blood, the Journal of the American Society of Hematology (ASH).

SCID is a group of rare and debilitating genetic disorders that affect the normal development of the immune system in newborns. Infants with SCID are prone to serious, life-threatening infections within the first few months of life and require extensive treatment for survival beyond infancy.

Adenosine deaminase (ADA) deficiency, which accounts for approximately 15 percent of all SCID cases, develops when a gene mutation prohibits the production of ADA, an enzyme that breaks down toxic molecules that can accumulate to harmful levels and kill lymphocytes, the specialized white blood cells that help make up the immune system. In its absence, infants with ADA-deficient SCID lack almost all immune defenses and their condition is almost always fatal within two years if left untreated. Standard treatment for ADA-deficient SCID is a hematopoietic stem cell transplant (HSCT) from a sibling or related donor; however, finding a matched donor can be difficult and transplants can carry significant risks. An alternate treatment method, enzyme replacement therapy (ERT), involves regular injections of the ADA enzyme to maintain the immune system and can help restore immune function; however, the treatments are extremely expensive and painful for the young patients and the eff
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Contact: Claire Gwayi-Chore
cgwayi-chore@hematology.org
202-776-0544
American Society of Hematology
Source:Eurekalert

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