These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.
Pubmed for Handhelds
PUBMED FOR HANDHELDS
Search MEDLINE/PubMed
Title: Selective labelling of M1-receptors in autonomic ganglia with 3H-pirenzepine. Author: Giraldo E, Monferini E, Hammer R. Journal: Arzneimittelforschung; 1985; 35(1A):325-8. PubMed ID: 3838676. Abstract: Using the classical muscarinic antagonist 3H-N-methyl-scopolamine as radioligand and unlabelled pirenzepine (PZ) as displacing agent, a heterogeneous muscarinic receptor population consisting of about 70% M1-receptors and 30% M2-receptor, can be demonstrated in crude membranes of calf sympathetic ganglia. In the same preparation only low and variable specific binding is detectable when 3H-PZ is used as marker ligand. The situation clearly improves when synaptosomes are prepared from the ganglia. Then binding of 3H-PZ can be measured with a favourable specific to non specific binding ratio and with features compatible with the selective labelling of ganglionic M1-receptor sites. It is concluded that the 3H-PZ binding assay in synaptosomes of autonomic ganglia is a novel method for the characterization of the peripheral M1-receptor.[Abstract] [Full Text] [Related] [New Search]