Effect of some drugs on human appendix in vitro

Area of Science:

• Pharmacology
• Gastroenterology
• Human Physiology

Background:

• The human appendix's physiological responses are not fully understood.
• Investigating neurotransmitter and receptor interactions in the appendix is crucial for understanding its function.

Purpose of the Study:

• To investigate the muscarinic action of acetylcholine in the human isolated appendix.
• To identify the receptors mediating histamine, nicotine, and DMPP-induced contractions.
• To explore the presence of adrenergic receptors in the human appendix.

Main Methods:

• Human isolated appendix tissue was used for pharmacological experiments.
• The effects of acetylcholine, histamine, nicotine, DMPP, and adrenergic drugs on appendix contractions were analyzed.

Main Results:

• Acetylcholine demonstrated a muscarinic action on the human appendix.
• Histamine-induced contractions were mediated by H1 receptors.
• Nicotine and DMPP induced contractions via action on ganglion cells.
• Experiments suggested the presence of beta receptors.

Conclusions:

• The human appendix exhibits distinct receptor-mediated responses to various neurotransmitters and drugs.
• Findings elucidate the pharmacological profile of the human appendix, contributing to its physiological understanding.