Neonatal proinflammatory stress induces accumulation of corticosterone and interleukin-6 in the hippocampus of juvenile rats: Potential mechanism of synaptic plasticity impairments
- Authors: Onufriev M.V.1, Freiman S.V.1, Peregud D.I.1, Kudryashova I.V.1, Tishkina A.O.1, Stepanichev M.Y.1, Gulyaeva N.V.1
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Affiliations:
- Institute of Higher Nervous Activity and Neurophysiology
- Issue: Vol 82, No 3 (2017)
- Pages: 275-281
- Section: Article
- URL: https://journals.rcsi.science/0006-2979/article/view/151281
- DOI: https://doi.org/10.1134/S0006297917030051
- ID: 151281
Cite item
Abstract
Infectious diseases in early postnatal ontogenesis can induce neuroinflammation, disrupt normal central nervous system development, and contribute to pathogenesis of cerebral pathologies in adults. To study long-term consequences of such early stress, we induced neonatal proinflammatory stress (NPS) by injecting bacterial lipopolysaccharide into rat pups on postnatal days 3 and 5 and then assessed the levels of corticosterone, proinflammatory cytokines and their mRNAs, and neurotrophins and their mRNAs in the hippocampus and neocortex of the one-month-old animals. Long-term potentiation (LTP) was studied in hippocampal slices as an index of synaptic plasticity. NPS-induced impairments of LTP were accompanied by the accumulation of corticosterone and IL-6 in the hippocampus. In the neocortex, a decrease in exon IV BDNF mRNA was detected. We suggest that excessive corticosterone delivery to hippocampal receptors and proinflammatory changes persisting during brain maturation are among the principal molecular mechanisms responsible for NPSinduced neuroplasticity impairments.
About the authors
M. V. Onufriev
Institute of Higher Nervous Activity and Neurophysiology
Author for correspondence.
Email: mikeonuf1@rambler.ru
Russian Federation, Moscow, 117485
S. V. Freiman
Institute of Higher Nervous Activity and Neurophysiology
Email: mikeonuf1@rambler.ru
Russian Federation, Moscow, 117485
D. I. Peregud
Institute of Higher Nervous Activity and Neurophysiology
Email: mikeonuf1@rambler.ru
Russian Federation, Moscow, 117485
I. V. Kudryashova
Institute of Higher Nervous Activity and Neurophysiology
Email: mikeonuf1@rambler.ru
Russian Federation, Moscow, 117485
A. O. Tishkina
Institute of Higher Nervous Activity and Neurophysiology
Email: mikeonuf1@rambler.ru
Russian Federation, Moscow, 117485
M. Yu. Stepanichev
Institute of Higher Nervous Activity and Neurophysiology
Email: mikeonuf1@rambler.ru
Russian Federation, Moscow, 117485
N. V. Gulyaeva
Institute of Higher Nervous Activity and Neurophysiology
Email: mikeonuf1@rambler.ru
Russian Federation, Moscow, 117485