Loss of miR-144 signaling interrupts extracellular matrix remodeling after myocardial infarction leading to worsened cardiac function.
Sci Rep
; 8(1): 16886, 2018 11 15.
Article
en En
| MEDLINE
| ID: mdl-30443020
ABSTRACT
We have previously shown that MicroRNA (miR) -144 is a key modulator of the acute cardioprotection associated with remote ischemic preconditioning and post myocardial infarction (MI) remodeling. In this study we examine the biology of the remodeling response after permanent ligation of the left anterior descending coronary artery in male miR-144 KO mice, and wild-type littermates (WT). Collagen content and cross linking were determined by hydroxyproline and pyridinoline assays, MI size and scar thickness were measured post PicoSirius Red staining, and cardiac function was evaluated by echocardiography. miR-144 KO mice developed normally with normal cardiac function, however after MI, infarction size was greater and scar thickness was reduced in miR-144 KO mice compared with WT littermates. miR-144 KO mice had a lower incidence of acute cardiac rupture compared with WT littermates early after MI but there was impaired late remodeling, reflected by increased total cardiac collagen content and collagen cross-linkage associated with changes in Zeb1/LOX1 axis, and decreased left ventricular ejection fraction. We conclude that miR-144 is involved in extracellular matrix remodeling post MI and its loss leads to increased myocardial fibrosis and impaired functional recovery.
Texto completo:
1
Base de datos:
MEDLINE
Asunto principal:
Transducción de Señal
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MicroARNs
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Matriz Extracelular
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Corazón
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Infarto del Miocardio
Idioma:
En
Revista:
Sci Rep
Año:
2018
Tipo del documento:
Article