Related Experiment Video
Updated: Jun 19, 2026
04:33
Methods for Detecting Cough and Airway Inflammation in Mice
Published on: August 2, 2024
Effect of smoking on cough reflex sensitivity: basic and preclinical studies
Lu-Yuan Lee1, Qihai Gu, You-Shuei Lin
1Department of Physiology, University of Kentucky, 800 Rose Street, Lexington, KY 40536-0298, USA. lylee@uky.edu
Lung
|October 22, 2009
Summary
Cigarette smoke activates airway sensory nerves, triggering cough. Nicotine receptors on these nerves are key to this acute response, while chronic smoking
Area of Science:
- Neuroscience
- Pulmonology
- Pharmacology
Background:
- Cigarette smoke inhalation causes acute airway irritation and cough.
- The role of specific sensory nerve activation in this response is not fully understood.
Purpose of the Study:
- To investigate the role of nicotinic acetylcholine receptors in mediating acute cough reflex to cigarette smoke.
- To explore the mechanisms underlying enhanced cough sensitivity following chronic cigarette smoke exposure.
Main Methods:
- Single-fiber recordings in anesthetized animals to identify stimulated airway sensory receptors.
- Electrophysiological studies on isolated vagal pulmonary sensory neurons to assess nicotine effects.
- Assessment of cough responses in guinea pigs after chronic smoke exposure.
Main Results:
- Inhalation of cigarette smoke stimulated C fibers and rapidly adapting receptors.
- Nicotine activated a subset of pulmonary sensory neurons via nicotinic acetylcholine receptors.
- Chronic smoke exposure in guinea pigs led to enhanced cough sensitivity.
Conclusions:
- Activation of nicotinic acetylcholine receptors on airway sensory nerves is primarily responsible for acute cough reflex to cigarette smoke.
- Enhanced cough sensitivity in chronic smokers may involve altered sensory nerve sensitivity and central processing, with individual variability.
- Further research is needed to understand the complex regulation of cough sensitivity in chronic smokers.
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