Enhancing miR-19a/b induced cardiomyocyte proliferation in infarcted hearts by alleviating oxidant stress and controlling miR-19 release.
Biomaterials
; 312: 122732, 2025 Jan.
Article
em En
| MEDLINE
| ID: mdl-39088913
ABSTRACT
Fully restoring the lost population of cardiomyocytes and heart function remains the greatest challenge in cardiac repair post myocardial infarction. In this study, a pioneered highly ROS-eliminating hydrogel was designed to enhance miR-19a/b induced cardiomyocyte proliferation by lowering the oxidative stress and continuously releasing miR-19a/b in infarcted myocardium in situ. In vivo lineage tracing revealed that â¼20.47 % of adult cardiomyocytes at the injected sites underwent cell division in MI mice. In MI pig the infarcted size was significantly reduced from 40 % to 18 %, and thereby marked improvement of cardiac function and increased muscle mass. Most importantly, our treatment solved the challenge of animal death--all the treated pigs managed to live until their hearts were harvested at day 50. Therefore, our strategy provides clinical conversion advantages and safety for healing damaged hearts and restoring heart function post MI, which will be a powerful tool to battle cardiovascular diseases in patients.
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Texto completo:
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Base de dados:
MEDLINE
Assunto principal:
Estresse Oxidativo
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Miócitos Cardíacos
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MicroRNAs
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Proliferação de Células
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Infarto do Miocárdio
Limite:
Animals
Idioma:
En
Ano de publicação:
2025
Tipo de documento:
Article