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Some recent advances in studies on J receptors
1DST Centre for Visceral Mechanisms, Delhi University, India.
Advances in Experimental Medicine and Biology
|January 1, 1995
Summary
New research reveals J receptors are stimulated by drug injections, causing sensations like choking. This discovery may help differentiate types of pulmonary edema and explains exercise-induced breathlessness.
Area of Science:
- Physiology
- Pulmonary Medicine
- Neuroscience
Background:
- J receptors are sensory nerve endings in the lungs.
- Previous research on J receptors has been limited.
- Understanding J receptor function is crucial for respiratory health.
Purpose of the Study:
- To investigate the role of J receptors in physiological responses.
- To develop a method for measuring drug concentrations in pulmonary circulation.
- To elucidate the cause of specific sensations associated with respiratory conditions.
Main Methods:
- Utilized the principle of relative dilution for in vivo drug concentration measurement.
- Observed solute movement across pulmonary capillaries.
- Analyzed responses to lobeline injections and high-altitude pulmonary edema.
Main Results:
- Demonstrated that excitatory solutes move via diffusion, not filtration.
- Increased capillary permeability enhances J receptor responses.
- Lobeline injections stimulate J receptors, causing choking and chest pressure sensations.
Conclusions:
- J receptor stimulation explains sensations in high-altitude pulmonary edema and exercise-induced breathlessness.
- Findings may enable differentiation between permeability and hemodynamic edema.
- New methods for measuring pulmonary drug concentrations have been developed.