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Histamine receptors in guinea-pig isolated urinary bladder
Indian Journal of Physiology and Pharmacology
|July 1, 1979
Summary
Histamine receptors H1 and H2 were investigated in guinea pig bladders. The study confirmed the presence of both H1 and H2 receptors, indicating their role in bladder function.
Area of Science:
- Pharmacology
- Urology
- Receptor Biology
Background:
- Histamine is a key mediator in physiological processes.
- Histamine receptors (H1 and H2) are implicated in various bodily functions.
- The role of histamine receptors in the urinary bladder requires further elucidation.
Purpose of the Study:
- To investigate the presence and function of histamine H1 and H2 receptors in the guinea pig urinary bladder.
- To determine the spasmogenic effects of specific H1 and H2 receptor agonists.
- To characterize the antagonistic effects of H1 and H2 receptor antagonists on bladder smooth muscle.
Main Methods:
- Isolated guinea pig urinary bladder preparation.
- Administration of histamine, 2-(2-aminoethyl) pyridine (H1 agonist), and 4-methyl-histamine (H2 agonist).
- Assessment of spasmogenic activity in the presence of mepyramine (H1 antagonist) and metiamide (H2 antagonist).
Main Results:
- Histamine, H1 agonist, and H2 agonist induced spasmogenic effects in the guinea pig urinary bladder.
- Mepyramine (H1 antagonist) and metiamide (H2 antagonist) modulated these effects.
- The findings indicate the involvement of both H1 and H2 receptors.
Conclusions:
- The guinea pig urinary bladder possesses both histamine H1 and H2 receptors.
- These receptors contribute to the regulation of urinary bladder smooth muscle tone.
- Further research can explore therapeutic targeting of these receptors.