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New database to speed genetic discoveries
Date:3/18/2013

A new online database combining symptoms, family history and genetic sequencing information is speeding the search for diseases caused by a single rogue gene. As described in an article in the May issue of Human Mutation, the database, known as PhenoDB, enables any clinician to document cases of unusual genetic diseases for analysis by researchers at the Johns Hopkins University School of Medicine or the Baylor College of Medicine in Houston. If a review committee agrees that the patient may indeed have a previously unknown genetic disease, the patient and some of his or her family members may be offered free comprehensive genetic testing in an effort to identify the disease culprit.

"PhenoDB is much more useful than I even thought it would be," says Ada Hamosh, M.D., M.P.H., a professor in the McKusick-Nathans Institute of Genetic Medicine at the Johns Hopkins University School of Medicine. "Bringing all of this information together is crucial to figuring out what our genetic variations mean." The database is designed to capture a bevy of standardized information about phenotype, which Hamosh defines as "any characteristic of a person" symptoms, personal and family health history, appearance, etc.

Hamosh and others developed PhenoDB for the Baylor-Hopkins Center for Mendelian Genomics (BHCMG), a four-year initiative that, together with its counterparts at Yale University and the University of Washington, is charged with uncovering the genetic roots of every disorder caused by a single faulty gene. There are an estimated 3,000 inherited disorders that have been described phenotypically in scientific papers but whose genetic causes have not yet been pinpointed, Hamosh says, but since many single-gene disorders are extremely rare, she suspects that many more have not yet made it into the literature.

The Centers for Mendelian Genomics have a powerful tool at their disposal, known as whole-exome sequencing. Just a few years ago,
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Contact: Shawna Williams
shawna@jhmi.edu
410-955-8236
Johns Hopkins Medicine
Source:Eurekalert

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