Chronic stress and brain-derived neurotrophic factor
A.V. DUBOVAYA, S.YA. IAROSHENKO, O.A. PRILUTSKAYA
Donetsk National Medical University named after M. Gorky, Donetsk
Contact details:
Dubovaya A.V. — DM, Associate Professor, Head of the Department of Pediatrics No. 3
Address: 16 Illicha Ave., Donetsk, 83003, tel.: +38 (099) 790-33-56, e-mail: dubovaya_anna@mail.ru
The article discusses the influence of stress on the development of nervous tissue, in particular, on the synthesis of neurotrophins (by the example of the brain-derived neurotrophic factor (BDNF), as the most studied class representative). The biological functions of BDNF are discussed as well as its influence on neuroplasticity and the mechanisms by which the protection of neurons is carried out. The article covers the relationship of the stress-implementing system (hypothalamic-pituitary-adrenal axis) and its main active agent (cortisol) with the BDNF synthesis system at its various levels: from the inhibition of mRNA formation to the mechanisms of postsynaptic signal transmission. Information is also provided on changes of BDNF levels due to the maternal deprivation. Epigenetic changes under the influence of glucocorticoids are also reported. However, it is not only glucocorticoids that alter the functioning of the neurotrophin system. The article provides examples of the reverse effect, enabling to consider neurotrophins as a substance with an anti-stress function. In conclusion, the authors give examples of activities that, according to research, can stimulate the synthesis of neurotrophic factor in the brain.
Key words: brain-derived neurotrophic factor, stress, hypothalamic-pituitary-adrenal system.