ABNORMAL EXPRESSION OF VOLTAGE-GATED SODIUM CHANNELS Nav1.7, Nav1.3 AND Nav1.8 IN TRIGEMINAL NEURALGIA


Autoria(s): SIQUEIRA, S. R. D. T.; ALVES, B.; MALPARTIDA, H. M. G.; TEIXEIRA, M. J.; SIQUEIRA, J. T. T.
Contribuinte(s)

UNIVERSIDADE DE SÃO PAULO

Data(s)

18/10/2012

18/10/2012

2009

Resumo

Voltage-gated sodium channels have been implicated in acute and chronic neuropathic pain. Among subtypes, Nav1.7 single mutations can cause congenital indifference to pain or chronic neuropathic pain syndromes, including paroxysmal ones. This channel is co-expressed with Nav1.8, which sustains the initial action potential; Nav1.3 is an embrionary channel which is expressed in neurons after injury, as in neuropathic conditions. Few studies are focused on the expression of these molecules in human tissues having chronic pain. Trigeminal neuralgia (TN) is an idiopathic paroxysmal pain treated with sodium channel blockers. The aim of this study was to investigate the expression of Nav1.3, Nav1.7 and Nav1.8 by RT-PCR in patients with TN, compared to controls. The gingival tissue was removed from the correspondent trigeminal area affected. We found that Nav1.7 was downregulated in TN (P=0.017) and Nav1.3 was upregulated in these patients (P=0.043). We propose a physiopathological mechanism for these findings. Besides vascular compression of TN, this disease might be also a channelopathy. (C) 2009 IBRO. Published by Elsevier Ltd. All rights reserved.

Identificador

NEUROSCIENCE, v.164, n.2, p.573-577, 2009

0306-4522

http://producao.usp.br/handle/BDPI/17146

10.1016/j.neuroscience.2009.08.037

http://dx.doi.org/10.1016/j.neuroscience.2009.08.037

Idioma(s)

eng

Publicador

PERGAMON-ELSEVIER SCIENCE LTD

Relação

Neuroscience

Direitos

restrictedAccess

Copyright PERGAMON-ELSEVIER SCIENCE LTD

Palavras-Chave #Nav1.7 #Nav1.3 #Nav1.8 #sodium channel #pain #trigeminal neuralgia #RAT INFRAORBITAL NERVE #OF-FUNCTION MUTATIONS #NEUROPATHIC PAIN #NA(V)1.7 #ERYTHROMELALGIA #ERYTHERMALGIA #DISORDERS #NEUROMAS #Neurosciences
Tipo

article

original article

publishedVersion