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Gene linked to schizophrenia: New clues to disorder

Date:
May 5, 2010
Source:
University of Montreal
Summary:
An international study suggests that gene mutations may predispose some individuals to schizophrenia and provides new clues about the causes of this ambiguous disorder. The findings demonstrate that new mutations in the SHANK3 gene are found in schizophrenic patients.

An international study led by Université de Montréal scientists suggests that gene mutations may predispose some individuals to schizophrenia and provides new clues about the causes of this ambiguous disorder. Published in the Proceedings of the National Academy of Sciences, the findings demonstrate that new mutations in the SHANK3 gene are found in schizophrenic patients.

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"That these de novo or new mutations occur in schizophrenia is rather unexpected and may explain why the identification of the genes linked to this disease has been so difficult," says senior author Guy Rouleau, a Université de Montréal professor, director of the Sainte-Justine University Hospital Research Center and a scientist at the Research Centre of the Centre Hospitalier de l'Université de Montréal.

"Our findings show that a significant number of schizophrenia cases are the result of new genetic mutations in the SHANK3 gene. Where previous approaches have failed, our detailed analyses and rich patient database led us to this discovery. We are convinced that future studies will validate the SHANK3 gene as a marker for schizophrenia," continues Dr. Rouleau, who is Canada Research Chair in Genetics of the Nervous System.

Autism and schizophrenia link

"The SHANK3 gene has previously been linked to autism," adds lead author Julie Gauthier, a Université de Montréal researcher. "Not only does this suggest a molecular genetic link between these two neurodevelopmental disorders, it suggests that SHANK3 may have a role in other brain disorders."

SHANK3 is protein involved in maintaining the physical structure of nerve cells. Mutations in this gene result in specific abnormalities in cell shapes. These deformations have been observed in some schizophrenia patients, providing further evidence of the importance of the SHANK3 gene in this disorder.

These findings were made possible through the collaboration of several institutions such as the Harvard Medical School, McGill University and the Université Paris Descartes; please read on for complete list of funders and partners.

About schizophrenia:

Affecting approximately one percent of the population, schizophrenia is a chronic psychiatric disorder characterized by disturbances in thinking, behaviour and emotion. Symptoms include delusions, hallucinations and withdrawal from social activity.

Partners in research:

This study was funded by Genome Canada, Génome Québec, the Université de Montréal and the Canada Foundation for Innovation.

About the study:

The article was coauthored by Julie Gauthier, Nathalie Champagne, Edna Brustein, Mathieu Lapointe, Huashan Peng, Marie-Pierre Dubé, Pierre Drapeau, Philip Awadalla and Guy Rouleau of the Université de Montréal, Fadi F. Hamdan and Mark E. Samuels of the Sainte-Justine University Hospital Research Center; Eric A. Stone of North Carolina State University; Philip A. Barker of the Montreal Neurological Institute; Anjené M. Addington and Judith L. Rapoport of the National Institute of Mental Health; Lynn E. DeLisi of the Harvard Medical School; Marie-Odile Krebs and Fayçal Mouaffak of the Université Paris Descartes; Ferid Fathalli, Ali P. Haghighi and Salvatore Carbonetto of McGill University / McGill University Health Centre; Ridha Joober of the Douglas Mental Health University Institute; Christian Néri of the Centre Paul Broca / INSERM.


Story Source:

The above story is based on materials provided by University of Montreal. Note: Materials may be edited for content and length.


Journal Reference:

  1. Julie Gauthier, Nathalie Champagne, Ronald G. Lafrenière, Lan Xiong, Dan Spiegelman, Edna Brustein, Mathieu Lapointe, Huashan Peng, Mélanie Côté, Anne Noreau, Fadi F. Hamdan, Anjené M. Addington, Judith L. Rapoport, Lynn E. Delisi, Marie-Odile Krebs, Ridha Joober, Ferid Fathalli, Fayçal Mouaffak, Ali P. Haghighi, Christian Néri, Marie-Pierre Dubé, Mark E. Samuels, Claude Marineau, Eric A. Stone, Philip Awadalla, Philip A. Barker, Salvatore Carbonetto, Pierre Drapeau, Guy A. Rouleau, and the S2D Team. De novo mutations in the gene encoding the synaptic scaffolding protein SHANK3 in patients ascertained for schizophrenia. Proceedings of the National Academy of Sciences, 2010; DOI: 10.1073/pnas.0906232107

Cite This Page:

University of Montreal. "Gene linked to schizophrenia: New clues to disorder." ScienceDaily. ScienceDaily, 5 May 2010. <www.sciencedaily.com/releases/2010/04/100412151825.htm>.
University of Montreal. (2010, May 5). Gene linked to schizophrenia: New clues to disorder. ScienceDaily. Retrieved October 25, 2014 from www.sciencedaily.com/releases/2010/04/100412151825.htm
University of Montreal. "Gene linked to schizophrenia: New clues to disorder." ScienceDaily. www.sciencedaily.com/releases/2010/04/100412151825.htm (accessed October 25, 2014).

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