Acta Biologica Hungarica
Volume/Issue:
Volume 61: Issue 2
Myocardial fibrosis is unaltered by long-term administration of L-arginine in dystrophin deficient mdx mice: A histomorphometric analysis
Authors: Maria Marques 1 , Isabel Barbin 1 , Ana Taniguti 1 , Daniela Oggian 1 , R. Ferretti 1 , and H. Santo Neto 1
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  • 1 Universidade Estadual de Campinas (UNICAMP) Departamento de Anatomia, Instituto de Biologia Celular, Fisiologia e Biofisica CP 6109 13083-970 Campinas, SP Brazil
DOI:
https://doi.org/10.1556/abiol.61.2010.2.5
Page Count:
168–174
Publication Date:
01 Jun 2010
Online Publication Date:
01 Jun 2010
Article Category:
Research Article
Restricted access

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.

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Cover Acta Biologica Hungarica
Acta Biologica Hungarica
Print ISSN:
0236-5383
Online ISSN:
1588-256X
Keywords:
Cardiac failure; cardiac fibrosis; cardiomyopathy; Duchenne muscular dystrophy

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