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Mini Gene can Delay Photoreceptor Degeneration in Leber Congenital Amaurosis

by Kanimozhi Tamilselvan on October 9, 2017 at 9:34 AM
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Mini Gene can Delay Photoreceptor Degeneration in Leber Congenital Amaurosis

A shortened form of the miniCEP290 gene for gene therapy of Leber congenital amaurosis type 10 (LCA 10) has been studied. Leber congenital amaurosis is a degenerative retinal disorder that causes childhood blindness.

The large size of the full-length gene has proven difficult to package into the adeno-associated virus (AAV) delivery vectors commonly used in gene therapy, but use of the truncated gene led to significant improvement in photoreceptor survival, morphology, and function, as reported in an article published in Human Gene Therapy, a peer-reviewed journal from Mary Ann Liebert, Inc., publishers. The article is available free on the Human Gene Therapy website.

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Wei Zhang, Linjing Li, Qin Su, Guangping Gao, and Hemant Khanna, University of Massachusetts Medical School, Worcester, describe their work in the article entitled "Gene Therapy Using a miniCEP290 Fragment Delays Photoreceptor Degeneration in a Mouse Model of Leber Congenital Amaurosis.

" The researchers present not only a potential approach for designing a suitable gene therapeutic strategy to overcome the CEP290 gene mutation underlying LCA, but also highlight the use of therapeutic mini genes as a viable option for delivering large genes to treat other diseases.
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"The dramatic clinical results observed in patients treated with AAV-RPE65 vectors with LCA2 has raised expectations that similar approaches could be used to treat many different single gene disorders of the retina," says Editor-in-Chief Terence R. Flotte, MD, Celia and Isaac Haidak Professor of Medical Education and Dean, Provost, and Executive Deputy Chancellor, University of Massachusetts Medical School, Worcester, MA.

"Overcoming the limitation of the packaging capacity of the AAV particle for this large gene is a critical step in the development of LCA10 gene therapy."

Source: Eurekalert
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