Abstract
3':5'-cGMP levels of neuroblastoma N1E-115 cells increase as much as 200-fold upon activation of muscarinic acetylcholine receptors, resulting in intracellular cGMP concentrations greater than 600 pmol/mg of protein. The cells also have receptors for adenosine which mediate an increase in 3':5'-cAMP levels. Unexpectedly, prostaglandin E1 was found to increase the concentrations of both cGMP and cAMP. Carbamylcholine, adenosine, and PGE1 were added to cells separately and in pairs to determine the effect of one compound on cell responses to another. Reciprocal inhibition, unilateral inhibition, additive, and nonadditive responses were observed with respect to cGMP and cAMP levels when different pairs of receptors were activated simultaneously.
MeSH Terms
Adenosine/pharmacology
Atropine/pharmacology
Carbachol/pharmacology
Cell Line
Cyclic AMP/metabolism
Cyclic GMP/metabolism
Drug Interactions
Prostaglandins E/pharmacology
Receptors, Cholinergic
Receptors, Drug
Tubocurarine/pharmacology
Chemicals
Prostaglandins E
Receptors, Cholinergic
Receptors, Drug
Atropine
Carbachol
Cyclic AMP
Cyclic GMP
Adenosine
Tubocurarine
Authors & Affiliations
2 authors, click to expand affiliations / ORCID
Matsuzawa H
Nirenberg M
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20 references, click to expand
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