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Type: Artigo de periódico
Title: Myocardial Fibrosis Is Unaltered By Long-term Administration Of L-arginine In Dystrophin Deficient Mdx Mice: A Histomorphometric Analysis.
Author: Marques, Maria Julia
Barbin, Isabel Cristina Chagas
Taniguti, Ana Paula Tiemi
Oggian, Daniela Silva
Ferretti, R
Santo Neto, H
Abstract: Cardiac failure secondary to myocardial fibrosis (MF) significantly contributes to death in Duchenne muscular dystrophy (DMD), a fatal form of muscle disease. In aging, the mdx mice, an animal model of DMD, MF is similar to that observed in humans. Nitric oxide-based therapy has been proposed to retard MF in DMD and a candidate is L-arginine (L-arg). In this study we evaluated the effects of long-term therapy with L-arg in the MF of mdx mice. mdx mice (6 months old) were treated with L-arg in drinking water. Control mdx mice received water only. After 15 months of treatment, hearts were stained with Masson's trichrome for analysis of MF and with hematoxilyn and eosin for analysis of inflammation and cardiomyocyte damage. We observed that MF was not affected (29.5 +/- 2.5% of MF area for control vs 31.4 +/- 2% for L-arginine-treated animals; P > 0.05). The density of inflammatory cells was reduced (169 +/- 12 cells/mm 2 in control vs 102 +/- 9 cells/mm 2 in L-arg-treated; P < 0.05). The present study shows that long-term administration of L-arg is not effective in retarding MF in mdx dystrophinopathy.
Subject: Animals
Mice, Inbred Mdx
Muscular Dystrophy, Duchenne
Nitric Oxide
Time Factors
Citation: Acta Biologica Hungarica. v. 61, n. 2, p. 168-74, 2010-Jun.
Rights: fechado
Identifier DOI: 10.1556/ABiol.61.2010.2.5
Date Issue: 2010
Appears in Collections:Unicamp - Artigos e Outros Documentos

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