Chronic nicotine impairs sparse motor learning via striatal fast-spiking parvalbumin interneurons

Authors
Kim, BaeksunIm, Heh-In
Issue Date
2021-05
Publisher
Taylor & Francis
Citation
Addiction Biology, v.26, no.3
Abstract
Nicotine can diversely affect neural activity and motor learning in animals. However, the impact of chronic nicotine on striatal activity in vivo and motor learning at long-term sparse timescale remains unknown. Here, we demonstrate that chronic nicotine persistently suppresses the activity of striatal fast-spiking parvalbumin interneurons, which mediate nicotine-induced deficit in sparse motor learning. Six weeks of longitudinal in vivo single-unit recording revealed that mice show reduced activity of fast-spiking interneurons in the dorsal striatum during chronic nicotine exposure and withdrawal. The reduced firing of fast-spiking interneurons was accompanied by spike broadening, diminished striatal delta oscillation power, and reduced sample entropy in local field potential. In addition, chronic nicotine withdrawal impaired motor learning with a weekly sparse training regimen but did not affect general locomotion and anxiety-like behavior. Lastly, the excitatory DREADD hM3Dq-mediated activation of striatal fast-spiking parvalbumin interneurons reversed the chronic nicotine withdrawal-induced deficit in sparse motor learning. Taken together, we identified that chronic nicotine withdrawal impairs sparse motor learning via disruption of activity in striatal fast-spiking parvalbumin interneurons. These findings suggest that sparse motor learning paradigm can reveal the subtle effect of nicotine withdrawal on motor function and that striatal fast-spiking parvalbumin interneurons are a neural substrate of nicotine's effect on motor learning.
Keywords
ANXIETY-LIKE BEHAVIOR; DORSAL STRIATUM; CHOLINERGIC INTERNEURONS; PERFORMANCE IMPROVEMENT; DIFFERENTIAL REGULATION; SYNAPTIC PLASTICITY; NEURAL INFORMATION; DOPAMINE RELEASE; SEX-DIFFERENCES; SPATIAL MEMORY; local field potential; motor learning; nicotine withdrawal; dorsal striatum; extracellular single-unit recording; fast-spiking interneurons
ISSN
1355-6215
URI
https://pubs.kist.re.kr/handle/201004/117018
DOI
10.1111/adb.12956
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KIST Article > 2021
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