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  • Title: Guanosine 3',5'-monophosphate in sympathetic ganglia: increase assoicated with synaptic transmission.
    Author: Weight FF, Petzold G, Greengard P.
    Journal: Science; 1974 Dec 06; 186(4167):942-4. PubMed ID: 4377760.
    Abstract:
    Brief stimulation of cholinergic preganglionic nerve fibers resulted in an increase in guanosine 3',5'-monophosphate (cyclic GMP) in the bullfrog sympathetic ganglion. When the release of synaptic transmitter was prevented by a high-magnesium, low-calcium Ringer solution, stimulation of preganglionic nerve fibers did not increase cyclic GMP in the ganglion. The increase in cyclic GMP caused by preganglionic stimulation was also blocked by the muscarinic antagonist, atropine. The data indicate that the increase in cyclic GMP is associated with synaptic transmission and support the possibility that cyclic GMP may mediate the postsynaptic action of acetylcholine at muscarinic cholinergic synapses.
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