Molecular Classification
Mechanoreceptor, Chemoreceptor, Sensory Neuron, Receptor
Other Names
Airway Sensory Nerve Endings, Tracheobronchial Cough Receptors, Mechanical Irritant Receptors (Airway), Chemical Irritant Receptors (Airway)
Disease Roles
Chronic coughAsthmaCOPD

Cough Receptor Overview

Cough receptors are specialized sensory nerve endings located primarily in the respiratory tract that detect mechanical and chemical irritants, initiating the cough reflex to protect the airways and lungs. They are found throughout the respiratory tract and also in other areas, like the ear and esophagus. These receptors play a crucial role in airway defense by triggering a rapid expulsion of air to clear irritants. Persistent activation or hypersensitivity of these receptors can contribute to chronic cough. Different types include mechanoreceptors and chemoreceptors. Neural pathways involve afferent signals via the vagus nerve to the brainstem, central processing, and efferent signals back to respiratory muscles.

Mechanism of Action

Modulation of cough receptor activity (e.g., desensitization, antagonism)

Biological Functions

Airway protection
Cough reflex initiation
Detection of mechanical stimuli
Detection of chemical stimuli
Mucus clearance

Disease Associations

Chronic cough
Asthma
COPD
Laryngopharyngeal Reflux (LPR)
Airway hypersensitivity

Safety Considerations

  • Suppression of cough reflex may lead to airway obstruction
  • Non-selective targeting may affect other sensory pathways

Interacting Drugs

Antitussives
Capsaicin
Bradykinin
Citric Acid
Glutamate