Implications of increased S100ß and Tau5 proteins in dystrophic nerves of two mdx mouse models for Duchenne muscular dystrophy.
Mol Cell Neurosci
; 105: 103484, 2020 06.
Article
em En
| MEDLINE
| ID: mdl-32240725
ABSTRACT
This study investigates changes with respect to increasing protein levels in dystrophic nerves of two mdx mouse models of Duchenne muscular dystrophy (DMD). We propose that these nerve changes result from progressive ongoing damage to neuromuscular junctions (NMJs) due to repeated intrinsic bouts of necrosis in dystrophic muscles. We compared sciatic nerves from classic mdx mice aged 13, 15 and 18 months (M), with D2.mdx mice (on DBA2 background) aged 9 and 13 M, using immunoblotting to quantify levels of 7 proteins. The neuronal proteins S100ß and Tau5 were increased by 13 M in mdx nerves (compared with WT), indicating ongoing myonecrosis in this strain. In striking contrast there was no difference in levels of these neuronal proteins for D2.mdx and D2.WT sciatic nerves at 13 M, indicating reduced myonecrosis over this time in D2.mdx mice compared with mdx. These novel changes in mdx sciatic nerves by 13 M, suggest early denervation or neurodegeneration of dystrophic nerves that is likely irreversible and progressive. This neuronal readout of persistent myonecrosis may provide a useful new long-term biomarker for preclinical studies that aim to reduce myonecrosis, plus such neuronal changes present potential new drug targets to help maintain the function of DMD muscles.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Proteínas tau
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Músculo Esquelético
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Distrofia Muscular de Duchenne
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Subunidade beta da Proteína Ligante de Cálcio S100
Limite:
Animals
Idioma:
En
Revista:
Mol Cell Neurosci
Assunto da revista:
BIOLOGIA MOLECULAR
/
NEUROLOGIA
Ano de publicação:
2020
Tipo de documento:
Article
País de afiliação:
Austrália