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The impact of voluntary wheel-running exercise on hippocampal neurogenesis and behaviours in response to nicotine cessation in rats

  • 0Department of Pharmacology and Brain Biostructure, Maj Institute of Pharmacology, Polish Academy of Sciences, 12 Smętna Street, Kraków, 31-343, Poland. zaniew@if-pan.krakow.pl.
Psychopharmacology +

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October 28, 2024

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October 28, 2024

View abstract on PubMed

Summary

This summary is machine-generated.

Wheel running boosts immature neuron growth in the hippocampus and reduces depression-like symptoms during nicotine withdrawal. Exercise benefits brain health and mood in nicotine-dependent rats.

Area Of Science

  • Neuroscience
  • Behavioral Science
  • Exercise Physiology

Background

  • Nicotine exposure and withdrawal negatively impact adult hippocampal neurogenesis in rats.
  • Exercise effects on neurogenesis during nicotine cessation are not well understood.
  • Previous research links reduced immature neurons in the dentate gyrus to depression-like states during nicotine withdrawal.

Purpose Of The Study

  • To examine how running wheel access influences hippocampal neurogenesis during nicotine withdrawal.
  • To assess the impact of exercise on depression-like behaviors in nicotine-deprived rats.
  • To determine if exercise affects drug-seeking behavior following nicotine self-administration.

Main Methods

  • Rats underwent nicotine self-administration followed by a 14-day abstinence period.
  • Animals were housed in cages with or without running wheels, or with locked wheels.
  • Hippocampal neurogenesis markers (Ki-67+, DCX+) and behavioral tests were assessed.

Main Results

  • Wheel running significantly increased the number of immature neurons (Ki-67+ and DCX+ cells) in the dentate gyrus.
  • Exercise demonstrated an antidepressant effect on withdrawal day 14.
  • Running wheel access did not alter nicotine-seeking behavior on withdrawal day 15.

Conclusions

  • Long-term wheel running enhances hippocampal neurogenesis, specifically increasing immature neurons.
  • Exercise-induced improvements in neurogenesis correlate with reduced depression-like symptoms during nicotine cessation.
  • Running may mitigate deficits in doublecortin-positive (DCX+) cells, contributing to a better affective state during nicotine withdrawal.

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