Possible activation of the NO-cyclic GMP-protein kinase G-K+ channels pathway by gabapentin on the formalin test

Pharmacology, Biochemistry, and Behavior
Mario I OrtizVinicio Granados-Soto

Abstract

The effect of modulators of the nitric oxide-cyclic GMP-protein kinase G-K+ channels pathway on the local peripheral antinociceptive action induced by gabapentin was assessed in the rat 1% formalin test. Local peripheral administration of gabapentin produced a dose-dependent antinociception in the second phase of the test. Gabapentin-induced antinociception was due to a local action as its administration in the contralateral paw was ineffective. Local peripheral pretreatment of the paws with NG-L-nitro-arginine methyl ester (L-NAME, a nitric oxide synthesis inhibitor), 1H-(1,2,4)-oxadiazolo(4,2-a)quinoxalin-1-one (ODQ, a soluble guanylyl cyclase inhibitor) and KT-5823 (a protein kinase G inhibitor) dose-dependently reduced gabapentin-induced antinociception. Likewise, glibenclamide or tolbutamide (ATP-sensitive K+ channel inhibitors), 4-aminopyridine or tetraethylammonium (non-selective inward rectifier K+ channel inhibitors) or charybdotoxin (large-conductance Ca2+-activated-K+ channel blocker), but not apamin (small-conductance Ca2+-activated-K+ channel blocker) or naloxone (opioid receptor antagonist), reduced the antinociception induced by gabapentin. Our data suggest that gabapentin could activate the nitric oxide-cyclic G...Continue Reading

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Citations

Sep 10, 2013·Life Sciences·Geovanna Nallely Quiñonez-BastidasVinicio Granados-Soto
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Sep 26, 2021·Behavioural Pharmacology·Samira MohammadiFatemeh Abbaszadeh

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