journal article Open Access Jan 16, 2015

The prelimbic cortex muscarinic M3receptor–nitric oxide–guanylyl cyclase pathway modulates cardiovascular responses in rats

Journal of Neuroscience Research Vol. 93 No. 5 pp. 830-838 · Wiley
View at Publisher Save 10.1002/jnr.23537
Abstract
The prelimbic cortex (PL), a limbic structure, sends projections to areas involved in the control of cardiovascular responses. Stimulation of the PL with acetylcholine (ACh) evokes depressor and tachycardiac responses mediated by local PL muscarinic receptors. Early studies demonstrated that stimulation of muscarinic receptors induced nitric oxide (NO) synthesis and cyclic guanosine cyclic monophosphate (cGMP) formation. Hence, this study investigates which PL muscarinic receptor subtype is involved in the cardiovascular response induced by ACh and tests the hypothesis that cardiovascular responses caused by muscarinic receptor stimulation in the PL are mediated by local NO and cGMP formation. PL pretreatment with J104129 (an M3receptor antagonist) blocked the depressor and tachycardiac response evoked by injection of ACh into the PL. Pretreatment with either pirenzepine (an M1receptor antagonist) or AF‐DX 116 (an M2and M4receptor antagonist) did not affect cardiovascular responses evoked by ACh. Moreover, similarly to the antagonism of PL M3receptors, pretreatment with Nω‐propyl‐L‐arginine (an inhibitor of neuronal NO synthase), carboxy‐PTIO(S)‐3‐carboxy‐4‐hydroxyphenylglicine (an NO scavenger), or 1H‐[1,2,4]oxadiazolol‐[4,3‐a]quinoxalin‐1‐one (a guanylate cyclase inhibitor) blocked both the depressor and the tachycardiac response evoked by ACh. The current results demonstrate that cardiovascular responses evoked by microinjection of ACh into the PL are mediated by local activation of the M3receptor–NO–guanylate cyclase pathway. © 2015 Wiley Periodicals, Inc.
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References
53
[12]
Caulfield MP "International Union of Pharmacology. XVII. Classification of muscarinic acetylcholine receptors" Pharmacol Rev (1998) 10.1016/s0031-6997(24)01362-0
[19]
Concepts of neural nitric oxide‐mediated transmission

John Garthwaite

European Journal of Neuroscience 10.1111/j.1460-9568.2008.06285.x
[37]
Paxinos G (2007)
[48]
Verberne AJ "Medullary sympathoexcitatory neurons are inhibited by activation of the medial prefrontal cortex in the rat" Am J Physiol (1996)
[49]
Changes in cutaneous and body temperature during and after conditioned fear to context in the rat

Daniel M. L. Vianna, Pascal Carrive

European Journal of Neuroscience 10.1111/j.1460-9568.2005.04073.x

Showing 50 of 53 references