Abstract
Brain-derived neurotropic factor (BDNF) plays an important role in mechanisms of depression. Precursor protein of this factor (proBDNF) can initiate apoptosis in the brain, while the mature form of BDNF is involved in neurogenesis. It is known that chronic alcoholization leads to the activation of apoptotic processes, neurodegeneration, brain injury, and cognitive dysfunction. In this work, we have studied the influence of long-term ethanol exposure on the proBDNF and BDNF protein levels, as well as on the expression of genes that encode these proteins in the brain structures of ASC mice with genetic predisposition to depressive-like behavior and in mice from parental nondepressive CBA strain. It was shown that chronic alcoholization results in a reduction of the BDNF level in the hippocampus and an increase in the amount of TrkB and p75 receptors in the frontal cortex of nondepressive CBA mice. At the same time, the long-term alcoholization of depressive ASC mice results in an increase of the proBDNF level in the frontal cortex and a reduction in the p75 protein level in the hippocampus. It has also been shown that, in depressive ASC mice, proBDNF and BDNF levels are significantly lower in the hippocampus and the frontal cortex compared with nondepressive CBA strain. However, no significant differences in the expression of genes encoding the studied proteins were observed. Thus, changes in the expression patterns of proBDNF, BDNF, and their receptors under the influence of alcoholization in the depressive ASC strain and nondepressive CBA strain mice are different.
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Abbreviations
- 5-HT:
-
serotonin
- BDNF:
-
brain-derived neurotrophic factor
- proBDNF:
-
pro-brain-derived neurotrophic factor (BDNF precursor)
- TrkB receptor:
-
tropomyosin receptor kinase B, receptor that mediates the influence of BDNF on neurons
- p75 receptor:
-
receptor that mediates the influence of proBDNF on neurons
- rPolII (RNA polymerase II):
-
DNAdependent RNA polymerase II
- RT:
-
reverse transcription
- PCR:
-
polymerase chain reaction
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Original Russian Text © D.V. Bazovkina, E.M. Kondaurova, A.S. Tsybko, A.I. Kovetskaya, T.V. Ilchibaeva, V.S. Naumenko, 2017, published in Molekulyarnaya Biologiya, 2017, Vol. 51, No. 4, pp. 647–655.
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Bazovkina, D.V., Kondaurova, E.M., Tsybko, A.S. et al. The effects of chronic alcoholization on the expression of brain-derived neurotrophic factor and its receptors in the brains of mice genetically predisposed to depressive-like behavior. Mol Biol 51, 571–578 (2017). https://doi.org/10.1134/S0026893317040057
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DOI: https://doi.org/10.1134/S0026893317040057