Systemic control of the molecular, cell, and epigenetic mechanisms of long-lasting consequences of stress

Systemic control of the molecular, cell, and epigenetic mechanisms of long-lasting consequences... Based on M.E. Lobashev’s views of the systemic control of genetic and cytogeneitc processes and a substantial effect of excitability on plastic changes in the central nervous system (CNS), the effect of prolonged emotional and pain stress (PEPS) on the molecular, cell, and epigenetic mechanisms of injury memory was studied in rat strains bred for a certain excitability of the nervous system. PEPS was for the first time found to cause long-lasting (2 months) morphological alterations of the CA3 region of the hippocampus and to modify the genome activity of its pyramidal neurons. The two phenomena were potentiated by a genetically determined low functional state of the CNS. The post-stress regulation of the genome function in hippocampal neurons was mediated by changes in heterochromatin conformation, activation of methyl-CpG-binding protein (MeCP2) synthesis, and subsequent changes in acetylation of histone H4. Genetically determined high excitability of the nervous system proved to be a risk factor that affects the specifics and time course of the observed molecular, cell, and genetic transformations of neurons. The results provide for a better understanding of the epigenetic mechanisms of injury memory, which forms a pathogenetic basis for posttraumatic stress disorder and other human psychogenic conditions characterized by a prolonged duration. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Genetics Springer Journals

Systemic control of the molecular, cell, and epigenetic mechanisms of long-lasting consequences of stress

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Publisher
SP MAIK Nauka/Interperiodica
Copyright
Copyright © 2009 by Pleiades Publishing, Ltd.
Subject
Biomedicine; Microbial Genetics and Genomics; Animal Genetics and Genomics; Human Genetics
ISSN
1022-7954
eISSN
1608-3369
D.O.I.
10.1134/S1022795409030065
Publisher site
See Article on Publisher Site

Abstract

Based on M.E. Lobashev’s views of the systemic control of genetic and cytogeneitc processes and a substantial effect of excitability on plastic changes in the central nervous system (CNS), the effect of prolonged emotional and pain stress (PEPS) on the molecular, cell, and epigenetic mechanisms of injury memory was studied in rat strains bred for a certain excitability of the nervous system. PEPS was for the first time found to cause long-lasting (2 months) morphological alterations of the CA3 region of the hippocampus and to modify the genome activity of its pyramidal neurons. The two phenomena were potentiated by a genetically determined low functional state of the CNS. The post-stress regulation of the genome function in hippocampal neurons was mediated by changes in heterochromatin conformation, activation of methyl-CpG-binding protein (MeCP2) synthesis, and subsequent changes in acetylation of histone H4. Genetically determined high excitability of the nervous system proved to be a risk factor that affects the specifics and time course of the observed molecular, cell, and genetic transformations of neurons. The results provide for a better understanding of the epigenetic mechanisms of injury memory, which forms a pathogenetic basis for posttraumatic stress disorder and other human psychogenic conditions characterized by a prolonged duration.

Journal

Russian Journal of GeneticsSpringer Journals

Published: Mar 20, 2009

References

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