Angiotensin II receptor type 1 blockade decreases CTGF/CCN2-mediated damage and fibrosis in normal and dystrophic skeletal muscles

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dc.contributor.authorCabello-Verrugio, Claudio
dc.contributor.authorMorales, Maria
dc.contributor.authorCabrera, Daniel
dc.contributor.authorVio, Carlos
dc.contributor.authorBrandan, Enrique
dc.date.accessioned2017-05-29T17:23:24Z
dc.date.available2017-05-29T17:23:24Z
dc.date.issued2012
dc.description.abstractConnective tissue growth factor (CTGF/CCN-2) is mainly involved in the induction of extracellular matrix (ECM) proteins. The levels of CTGF correlate with the degree and severity of fibrosis in many tissues, including dystrophic skeletal muscle. The CTGF overexpression in tibialis anterior skeletal muscle using an adenoviral vector reproduced many of the features observed in dystrophic muscles including muscle damage and regeneration, fibrotic response and decrease in the skeletal muscle strength. The renin–angiotensin system is involved in the genesis and progression of fibrotic diseases through its main fibrotic components angiotensin-II and its transducer receptor AT-1. The use of AT-1 receptor blockers (ARB) has been shown to decrease fibrosis. In this paper, we show the effect of AT-1 receptor blockade on CTGF-dependent biological activity in skeletal muscle cells as well as the response to CTGF overexpression in normal skeletal muscle. Our results show that in myoblasts ARB decreased CTGF-mediated increase of ECM protein levels, extracellular signal regulated kinases 1/2 (ERK-1/2) phosphorylation and stress fibres formation. In tibialis anterior muscle overexpressing CTGF using an adenovirus, ARB treatment decreased CTGF-mediated increase of ECM molecules, α-SMA and ERK-1/2 phosphorylation levels. Quite remarkable, ARB was able to prevent the loss of contractile force of tibialis anterior muscles overexpressing CTGF. Finally, we show that ARB decreased the levels of fibrotic proteins, CTGF and ERK-1/2 phosphorylation augmented in a dystrophic skeletal muscle from mdx mice. We propose that ARB is a novel pharmacological tool that can be used to decrease the fibrosis induced by CTGF in skeletal muscle associated with muscular dystrophies.
dc.format.extent13
dc.identifier.citationJournal of Cellular and Molecular Medicine,2012,16(4):752-64
dc.identifier.urihttp://hdl.handle.net/11447/1362
dc.identifier.urihttp://dx.doi.org/10.1111/j.1582-4934.2011.01354.x
dc.language.isoen_US
dc.publisherJohn Wiley & Sons
dc.subjectCTGF
dc.subjectskeletal muscle fibrosis
dc.subjectangiotensin II receptor type I blocker (ARB)
dc.subjectmuscular dystrophies
dc.titleAngiotensin II receptor type 1 blockade decreases CTGF/CCN2-mediated damage and fibrosis in normal and dystrophic skeletal muscles
dc.typeArtículo

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