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Cholinergic modulation of anaphylactic dopamine release from calf lung
International Archives of Allergy and Applied Immunology
|January 1, 1979
Summary
Specific antigens trigger dopamine release from calf lungs during anaphylaxis. This release is modulated by vagal and muscarinic mechanisms, involving substances like carbachol, atropine, nicotine, and tubocurarine.
Area of Science:
- Immunology
- Neuropharmacology
- Veterinary Medicine
Background:
- Anaphylaxis is a severe allergic reaction.
- The role of neurotransmitters in anaphylaxis is complex.
- Calf lungs are a model for studying allergic responses.
Purpose of the Study:
- To investigate the release of dopamine during anaphylaxis in calf lungs.
- To explore the modulatory mechanisms of dopamine release.
- To understand the involvement of vagal and muscarinic pathways.
Main Methods:
- In vitro sensitization of calf lung tissue.
- Challenge with specific antigen to induce anaphylaxis.
- Measurement of dopamine release.
- Pharmacological manipulation using carbachol, atropine, nicotine, and tubocurarine.
Main Results:
- Specific antigen challenge caused dopamine release from sensitized calf lungs.
- Carbachol potentiated dopamine release, while atropine inhibited it.
- Nicotine enhanced dopamine release, an effect further amplified by tubocurarine.
Conclusions:
- Anaphylactic dopamine release in calf lungs is modulated by a vagal (muscarinic) mechanism.
- Neurotransmitter pathways play a significant role in the pathophysiology of anaphylaxis.
- These findings contribute to understanding allergic responses in livestock.