The impact of early-life stress on the expression of genes associated with the formation of the myelin sheath of neurons in the prefrontal cortex of 15-day-old male mice

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Anastasia S. Shulyupova1, Arina A. Smelova2, Vasiliy V. Reshetnikov3, Natalya P. Bondar4
1Laboratory of Gene Expression Regulation Institute of Cytology and Genetics of Siberian Branch of the Russian Academy of Sciences, IРЎ&G SB RAS, shulyupova@bionet.nsc.ru
2Epigenetics laboratory National Research Novosibirsk State University, NSU, smelovarina@gmail.com
3Laboratory of Gene Expression Regulation Institute of Cytology and Genetics of Siberian Branch of the Russian Academy of Sciences, IРЎ&G SB RAS, vasiliyreshetnikov@bionet.nsc.ru
4Laboratory of Gene Expression Regulation Institute of Cytology and Genetics of Siberian Branch of the Russian Academy of Sciences, IРЎ&G SB RAS, nbondar@bionet.nsc.ru

The early postnatal period is critical for the development of the central nervous system and can predetermine subsequent behavioral patterns, so stress at this age can lead to long-term consequences in adulthood. In our work, we investigated effects early life stress on myelination. We assessed the expression of the genes associated with the myelin sneath (myelin basic protein – Mbp, myelin-associated oligodendrocyte basic protein – Mobp, proteolipid protein 1 – Plp1, proteolipid in compact myelin – Mal, myelin oligodendrocyte glycoprotein – Mog, choline-specific glycerophosphodiester-phosphodiesterase – Enpp6, UDP-glucuronosyltransferase – Ugt8a) in frontal cortex of mice. The greatest difference in the level of expression was found between groups with a maternal deprivation and a maternal separation from mothers: significant changes were shown for the Enpp6, Mal, Ugt8a genes and one of the Mobp gene transcripts. This may indicate a different extent of exposure to stressors. We can conclude that the stress in the early postnatal period affects the myelination process and can lead to impaired transmission of nerve impulses.

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Anton Tsybko
Anton Tsybko
3 years ago

Is it possible that the increased expression of Enpp6, Mal, Ugt8a genes in the MD mice be associated with hypermyelination?

Anastasia Shulyupova
Anastasia Shulyupova
3 years ago
Reply to  Anton Tsybko

Yes, we can assume that. This may indicate earlier maturation of the myelin sheath, which has consequences, since timeliness is important in the process of myelination.

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