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Research sees overlap in genes altered in schizophrenia, autism, intellectual disability
Date:4/29/2014

Dublin, Ireland and Cold Spring Harbor, NY In research published today in Molecular Psychiatry, a multinational team of scientists presents new evidence supporting the theory that in at least some cases of schizophrenia, autism and intellectual disability (ID), malfunctions in some of the same genes are contributing to pathology.

The team, the product of an ongoing collaboration between Professors W. Richard McCombie of Cold Spring Harbor Laboratory (CSHL) and Aiden Corvin of Trinity College, Dublin, studied a type of gene aberration called de novo mutation, in a sample of 42 "trio" families in which the child, but neither parent, was diagnosed with schizophrenia and/or psychosis and 15 trio families with a history of psychosis.

Schizophrenia is thought to be caused in many instances by gene mutations passed from parents to children, the effects of which may be enhanced by adverse environmental factors. In contrast, de novo mutations, or DNMs, are gene defects in offspring that neither parent possesses. They are the result of mechanical DNA copying errors, and occur infrequently in every human being during sperm and egg development, typically with no overall impact on human health.

However, on rare occasions, de novo mutations occur in a gene or genes indispensable for normal development and thus can have devastating consequences. This may be true of several of the genes affected by DNMs that are described in the newly published research. According to Shane McCarthy, Ph.D., a CSHL research investigator who is lead author of the new study, three genes found among the 42 affected children in the study AUTS2, CDH8 and MECP2 have been identified in prior genetic studies of people with autism. Two others, HUWE1 and TRAPPC9, have turned up in studies of people with intellectual disability.

Of these five "overlapping" genes, three (CHD8, MECP2 and HUWE1) have convergent function. They play roles in what scientists
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Contact: Peter Tarr
tarr@cshl.edu
516-367-8455
Cold Spring Harbor Laboratory
Source:Eurekalert

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