Presence of metalloproteinases 2 and 9 and 8-OHdG in the fibrotic process in skeletal muscle of Mdx mice.

Autor: Souza LB; Departamento de Biociências, Universidade Federal de São Paulo, Campus Baixada Santista, SP, Brazil., Maziero C; Departamento de Biociências, Universidade Federal de São Paulo, Campus Baixada Santista, SP, Brazil., Lazzarin MC; Departamento de Biociências, Universidade Federal de São Paulo, Campus Baixada Santista, SP, Brazil., Quintana HT; Departamento de Biociências, Universidade Federal de São Paulo, Campus Baixada Santista, SP, Brazil., Tomé TC; Departamento de Biociências, Universidade Federal de São Paulo, Campus Baixada Santista, SP, Brazil., Baptista VIA; Departamento de Biociências, Universidade Federal de São Paulo, Campus Baixada Santista, SP, Brazil., de Oliveira F; Departamento de Biociências, Universidade Federal de São Paulo, Campus Baixada Santista, SP, Brazil. Electronic address: flavia.oliveira@unifesp.br.
Jazyk: angličtina
Zdroj: Acta histochemica [Acta Histochem] 2020 Jan; Vol. 122 (1), pp. 151458. Date of Electronic Publication: 2019 Nov 04.
DOI: 10.1016/j.acthis.2019.151458
Abstrakt: Inflammation and oxidative stress occurs in muscle of Duchenne muscular dystrophy (DMD). The relationship between a panel of biomarkers and the DMD outcome is necessary to indicate of disease progression and response to rehabilitation programs. The aim was to analyze the connective tissue of muscle of Mdx mice and immunoexpression of MMP-2, MMP-9, and 8-OHdG, which signalizes oxidative stress related to DNA damage. Biceps brachii of male C57BL/10 and C57BL/10-Dmd mdx mice was submitted to Hematoxylin-Eosin, Sirius red and immunohistochemistry (MMP-2, MMP-9 and 8-OHdG) analysis. Mdx showed focal lesions with intense inflammation and fibrosis related to immunoexpression of MMP-2 and MMP-9, proving the hypothesis that these MMPs are linked to muscular tissue degeneration, which can be regenerated by their inhibition, improving the treatment of DMD carriers. Histopathological findings related to centralized nuclei increase were related to higher 8-OHdG immunomarked nuclei in Mdx, which signalizes oxidative stress associated with DNA damage provoked by DMD. Such result shows that the evaluation of 8-OHdG during the evolution of the disease could be a method to evaluate DMD disease progression.
(Copyright © 2019 Elsevier GmbH. All rights reserved.)
Databáze: MEDLINE
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