6533b7dafe1ef96bd126e1ca

RESEARCH PRODUCT

Functional relevance of presynaptic muscarinic autoreceptors.

H. KilbingerC. DietrichR. S. Von Bardeleben

subject

medicine.medical_specialtyGeneral NeuroscienceGuinea PigsPresynaptic TerminalsMuscarinic acetylcholine receptor M3Muscarinic acetylcholine receptor M2Muscle SmoothMuscarinic acetylcholine receptor M1PharmacologyBiologyIn Vitro TechniquesReceptors MuscarinicTracheaEndocrinologyPostsynaptic potentialIleumPhysiology (medical)Internal medicineMuscarinic acetylcholine receptorMuscarinic acetylcholine receptor M5medicineMuscarinic acetylcholine receptor M4AnimalsAcetylcholinemedicine.drug

description

Pre- and postsynaptic muscarinic receptors have been characterized in the isolated trachea and ileal circular muscle of the guinea pig. The muscarinic autoreceptors mediating inhibition of acetylcholine release in the circular muscle belong to the M1 subtype, whereas those inhibiting acetylcholine release in the trachea are M2 or M4 receptors. In both tissues the postsynaptic muscarinic receptors are M3 receptors. Blockade of the autoreceptors by selective M1 and M2/M4 receptor antagonists leads to facilitation of cholinergic neurotransmission.

10.1016/0928-4257(93)90001-ahttps://pubmed.ncbi.nlm.nih.gov/8305900