PMID- 2161908 OWN - NLM STAT- MEDLINE DCOM- 19900716 LR - 20131121 IS - 0022-3034 (Print) IS - 0022-3034 (Linking) VI - 21 IP - 3 DP - 1990 Apr TI - A role for cAMP in the development of functional neuromuscular transmission. PG - 414-26 AB - We have found that the incidence of functionally connected neuron-myotube pairs in chick ciliary-myotube cultures increases from 58% to more than 90% when the cells are treated for several hours with 8-bromo-cyclic adenosine monophosphate (8-br-cAMP) or with agents known to increase intracellular cAMP. The increase in connectivity was not accompanied by a change in neuron survival, or in the length of neurite-myotube contact. Moreover, there was no change in the shape of the presynaptic action potential, in mean end plate potential (epp) amplitude or in the sensitivity of postsynaptic acetylcholine receptors (AChRs). One interpretation of these results in that a cAMP-dependent phosphorylation acts as a trigger to activate a previously "silent" synapse. FAU - Dubinsky, J M AU - Dubinsky JM AD - Department of Anatomy and Neurobiology, Washington University School of Medicine, St. Louis, Missouri 63110. FAU - Fischbach, G D AU - Fischbach GD LA - eng PT - Journal Article PL - United States TA - J Neurobiol JT - Journal of neurobiology JID - 0213640 RN - 0 (Receptors, Cholinergic) RN - 1F7A44V6OU (Colforsin) RN - 23583-48-4 (8-Bromo Cyclic Adenosine Monophosphate) RN - E0399OZS9N (Cyclic AMP) RN - N9YNS0M02X (Acetylcholine) SB - IM MH - 8-Bromo Cyclic Adenosine Monophosphate/pharmacology MH - Acetylcholine/pharmacology MH - Action Potentials/drug effects MH - Animals MH - Cell Differentiation MH - Cells, Cultured MH - Chickens MH - Colforsin/pharmacology MH - Cyclic AMP/*physiology MH - Ganglia, Parasympathetic/cytology/drug effects/*physiology MH - Motor Neurons/cytology/drug effects/*physiology MH - Muscles/cytology/drug effects/*physiology MH - Neuromuscular Junction/drug effects/*physiology MH - Receptors, Cholinergic/metabolism MH - Synaptic Transmission EDAT- 1990/04/01 00:00 MHDA- 1990/04/01 00:01 CRDT- 1990/04/01 00:00 PHST- 1990/04/01 00:00 [pubmed] PHST- 1990/04/01 00:01 [medline] PHST- 1990/04/01 00:00 [entrez] AID - 10.1002/neu.480210304 [doi] PST - ppublish SO - J Neurobiol. 1990 Apr;21(3):414-26. doi: 10.1002/neu.480210304.