The effect of rifampicin on the system of Toll-like receptors in the nucleus accumbens of the brain of long-term alcoholized rats during alcohol withdrawal

   
Airapetov M.I.1 , Eresko S.O.2, Skabelkin D.A.3, Iskalieva A.R.3, Lebedev A.A.3, Bychkov E.R.3, Shabanov P.D.4

1. Department of Neuropharmacology, Institute of Experimental Medicine, St. Petersburg, Russia; Department of Pharmacology, St. Petersburg State Pediatric Medical University,
2. Department of Neuropharmacology, Institute of Experimental Medicine, St. Petersburg, Russia; Research and Training Center of Molecular and Cellular Technologies, St. Petersburg, Russia
3. Department of Neuropharmacology, Institute of Experimental Medicine, St. Petersburg, Russia
4. Department of Neuropharmacology, Institute of Experimental Medicine, St. Petersburg, Russia; Department of Pharmacology, Kirov Military Medical Academy, St. Petersburg, Russia
Section: Experimental Study
DOI: 10.18097/PBMC20226804279      PubMed Id: 36005846
Year: 2022  Volume: 68  Issue: 4  Pages: 279-287
Nucleus accumbens (NAc) is the ventral part of the striatum of the brain; it is an important part of the mesolimbic pathway involved in the reward system that mediates the formation of various forms of addiction, in particular alcohol addiction. Neuroimaging data and in vitro studies indicate the development of a pronounced neurodegenerative process in the NAc, with long-term alcohol use, but the key mechanisms mediating this process remain unknown. In recent years, the attention of researchers has been focused on studying the system of Toll-like receptors (TLRs), the increased activity of which is clearly shown in the cerebral cortex and hippocampus during prolonged alcohol exposure, but there is a need to study the role of this system in other brain structures. In this study, we have shown that prolonged alcohol exposure (2 months) with moderate doses of ethanol (2 g/kg) promotes a pronounced increase in the expression of the Tlr4 gene and its endogenous ligand Hmgb1 in NAc during the period of alcohol withdrawal in rats. Injections of rifampicin (100 mg/kg) reduced the elevated expression level of Hmgb1, Tlr4, as well as pro-inflammatory cytokine genes (IL1β, IL6), while the administration of the drug increased the reduced level of mRNA of anti-inflammatory cytokines (IL10, IL11).
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Keywords: alcohol exposure, ethanol, brain, neuroinflammation, nucleus accumbens, TLR4, rifampicin
Citation:

Airapetov, M. I., Eresko, S. O., Skabelkin, D. A., Iskalieva, A. R., Lebedev, A. A., Bychkov, E. R., Shabanov, P. D. (2022). The effect of rifampicin on the system of Toll-like receptors in the nucleus accumbens of the brain of long-term alcoholized rats during alcohol withdrawal. Biomeditsinskaya Khimiya, 68(4), 279-287.
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