Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/79575
Type: Artigo de periódico
Title: Stretch-activated calcium channel protein TRPC1 is correlated with the different degrees of the dystrophic phenotype in mdx mice
Author: Matsumura, CY
Taniguti, APT
Pertille, A
Neto, HS
Marques, MJ
Abstract: Matsumura CY, Taniguti AP, Pertille A, Santa Neto H, Marques MJ. Stretch-activated calcium channel protein TRPC1 is correlated with the different degrees of the dystrophic phenotype in mdx mice. Am J Physiol Cell Physiol 301: C1344-C1350, 2011. First published September 7, 2011; doi: 10.1152/ajpcell.00056.2011.-In Duchenne muscular dystrophy (DMD) and in the mdx mouse model of DMD, the lack of dystrophin is related to enhanced calcium influx and muscle degeneration. Stretch-activated channels (SACs) might be directly involved in the pathology of DMD, and transient receptor potential cation channels have been proposed as likely candidates of SACs. We investigated the levels of transient receptor potential canonical channel 1 (TRPC1) and the effects of streptomycin, a SAC blocker, in muscles showing different degrees of the dystrophic phenotype. Mdx mice (18 days old, n = 16) received daily intraperitoneal injections of streptomycin (182 mg/kg body wt) for 18 days, followed by removal of the diaphragm, sternomastoid (STN), biceps brachii, and tibialis anterior muscles. Control mdx mice (n = 37) were injected with saline. Western blot analysis showed higher levels of TRPC1 in diaphragm muscle compared with STN and limb muscles. Streptomycin reduced creatine kinase and prevented exercise-induced increases of total calcium and Evans blue dye uptake in diaphragm and in STN muscles. It is suggested that different levels of the stretch-activated calcium channel protein TRPC1 may contribute to the different degrees of the dystrophic phenotype seen in mdx mice. Early treatment designed to regulate the activity of these channels may ameliorate the progression of dystrophy in the most affected muscle, the diaphragm.
Subject: dystrophinopaties
streptomycin
Duchenne muscular dystrophy
transient receptor potential canonical channel 1
Country: EUA
Editor: Amer Physiological Soc
Rights: embargo
Identifier DOI: 10.1152/ajpcell.00056.2011
Date Issue: 2011
Appears in Collections:Unicamp - Artigos e Outros Documentos

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