The impact of age on cardiac function and extracellular matrix component expression in adverse post-infarction remodeling in mice.
Exp Gerontol
; 119: 193-202, 2019 05.
Article
em En
| MEDLINE
| ID: mdl-30763602
ABSTRACT
The aim of this study was to describe the potential associations of the expression of matricellular components in adverse post-infarction remodeling of the geriatric heart. In male geriatric (OM, age 18â¯months) and young (YM, age 11â¯weeks) OF1 mice myocardial infarction (MI) was induced by permanent ligation of the left anterior descending coronary artery. Cardiac function was evaluated by MRI. Plasma and myocardial tissue samples were collected 3d, 7d, and 32d post-MI. Age and MI were associated with impaired cardiac function accompanied by left-ventricular (LV) dilatation. mRNA expression of MMP-2 (7d pâ¯<â¯0.05), TIMP-1 (7d pâ¯<â¯0.05), TIMP-2 (7d pâ¯<â¯0.05), Collagen-1 (3d and 7d pâ¯<â¯0.05) and Collagen-3 (7d pâ¯<â¯0.05) in LV non-infarcted myocardium was significantly higher in YM than in OM after MI. MMP-9 activity in plasma was increased in OM after MI (3d pâ¯<â¯0.01). Tenascin-C protein levels assessed by ELISA were decreased in OM as compared to YM after MI in plasma (3d pâ¯<â¯0.001, 7d pâ¯<â¯0.05) and LV non-infarcted myocardium (7d pâ¯<â¯0.01). Dysregulation in ECM components in non-infarcted LV might be associated and contribute to adverse LV remodeling and impaired cardiac function. Thus, targeting ECM might be a potential therapeutic approach to enhance cardiac function in geriatric patients following MI.
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MEDLINE
Assunto principal:
Envelhecimento
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Remodelação Ventricular
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Infarto do Miocárdio
Limite:
Animals
Idioma:
En
Ano de publicação:
2019
Tipo de documento:
Article