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Mapping of hippocampal gene clusters regulated by the amygdala to nonlinkage sites for schizophrenia

Molecular Psychiatry volume 11, pages 158–171 (2006)Cite this article

Abstract

A recent study using a ‘partial’ rodent model of schizophrenia has employed amygdalar activation to induce reported changes in the expression of hippocampal genes associated with metabolic and signaling pathways in response to amygdalar activation. The amygdalo–hippocampal pathway plays a central role in the regulation of the stress response and emotional learning. In the current study, we have performed a chromosome mapping analysis to determine whether genes showing changes in response to environmental stress may form clusters and, if so, whether they might show a topographical association with linkage sites for schizophrenia. When the hippocampal genes showing changes in expression were topographically mapped on specific rat chromosomes, significant clustering was observed on chromosomes 1, 4 and 8, although chromosome 1 showed the largest amount of clustering. When these same rodent genes were mapped to human chromosomes, most of the genes found on chromosome 1 in rat mapped to chromosome 11 in human. The vast majority of the genes showing changes in regulation were excluded from known linkage sites for schizophrenia. Based on these findings, we postulate that environmental factors may contribute to the endophenotype for schizophrenia through the activation and/or deactivation of specific genetic clusters, ones that do not appear to be directly associated with susceptibility genes for this disorder.

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Acknowledgements

This work was supported by grants from the National Institutes of Health (MH42261, MH62822, MH/NS31862) and the generosity of Menachem and Carmella Abraham, John and Virginia Taplin and Anne Allen.

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Authors and Affiliations

  1. Program in Structural and Molecular Neuroscience, McLean Hospital, Belmont, MA, USA

    R E Burke, J Walsh, D Matzilevich & F M Benes

  2. Program in Neuroscience, Harvard Medical School, Boston, MA, USA

    F M Benes

  3. Department of Psychiatry, Harvard Medical School, Boston, MA, USA

    D Matzilevich & F M Benes

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  1. R E Burke
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Correspondence to F M Benes.

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Burke, R., Walsh, J., Matzilevich, D. et al. Mapping of hippocampal gene clusters regulated by the amygdala to nonlinkage sites for schizophrenia. Mol Psychiatry 11, 158–171 (2006). https://doi.org/10.1038/sj.mp.4001769

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