Effects of exercise training on myocardial mitochondrial miR-499-CaN-Drp-1 apoptotic pathway in mice / 中国应用生理学杂志
Chinese Journal of Applied Physiology
;
(6): 259-263, 2015.
Artigo
em Chinês
| WPRIM
| ID: wpr-255038
ABSTRACT
<p><b>OBJECTIVE</b>To detect the levels of miR-499 and relative proteins in hearts of mice after exercise training, and investigate the mechanism of exercise-regulative apoptosis.</p><p><b>METHODS</b>Male C57BL/6 mice were randomly divided into 3 groups( n = 14) sedentary (SE), exercise training 1 (ET1) and exercise training 2 (ET2) group. SE did not do any exercise. ET1 performed swimming training for 8 weeks. ET2 performed the same work as ET1 until the 5th week. Then, mice trained twice a day until the end of training. TUNEL assay was applied to test myocardial apoptosis, RT-PCR and Western blot were used to detect miR-499 and proteins levels respectively.</p><p><b>RESULTS</b>Compared with SE, stress in ET1 failed to affect apoptotic index (AI) and miR-499-CaN-Drp-1 pathway (P > 0.05). In contrast, exercise load in ET2 increased miR-499 level, decreased Drp-1 level and AI with statistical significance respectively (P < 0.05), but neither CaN expression nor CaN activity was changed significantly (P > 0.05).</p><p><b>CONCLUSION</b>Swimming training can inhibit myocardial apoptosis, and the decrease in Drp-l may be responsible for the reduced myocardial apoptosis. CaN, the upstream protein, does not participate in exercise-regulative apoptosis.</p>
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Assunto principal:
Patologia
/
Condicionamento Físico Animal
/
Fisiologia
/
Natação
/
Apoptose
/
Dinaminas
/
MicroRNAs
/
Coração
/
Metabolismo
/
Camundongos Endogâmicos C57BL
Limite:
Animais
Idioma:
Chinês
Revista:
Chinese Journal of Applied Physiology
Ano de publicação:
2015
Tipo de documento:
Artigo
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