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Pharmacological clearance of senescent cells improves cardiac remodeling and function after myocardial infarction in female aged mice
Mechanisms of Ageing and Development ( IF 5.3 ) Pub Date : 2022-09-20 , DOI: 10.1016/j.mad.2022.111740
Nadia Salerno 1 , Fabiola Marino 2 , Mariangela Scalise 2 , Luca Salerno 2 , Claudia Molinaro 1 , Andrea Filardo 1 , Antonio Chiefalo 2 , Giuseppe Panuccio 1 , Antonella De Angelis 3 , Konrad Urbanek 4 , Daniele Torella 2 , Eleonora Cianflone 1
Affiliation  

Cardiovascular diseases (CVD) are predominantly an aging disease. Important sex-specific differences exist and the mechanism(s) by which this sex-by-age interaction influences CVD development and progression remains elusive. Accordingly, it is still unknown whether cell senescence, a main feature of cardiac male aging, is a significant feature also of the female aged mouse heart and whether senolytics, senescence-clearing compounds, promote myocardial repair and regeneration after myocardial infarction (MI) in aged female mice. To this aim, the combination of two senolytics, dasatinib and quercetin (D+Q) or just their vehicle was administered to 22–24 months old C57BL/6 female mice after MI. D+Q improved global left ventricle function and myocardial performance after MI whereby female cardiac aging is characterized by accumulation of cardiac senescent cells that are further increased by MI. Despite their terminal differentiation nature, also cardiomyocytes acquire a senescent phenotype with age in females. D+Q removed senescent cardiac non-myocyte and myocyte cells ameliorating cardiac remodeling and regeneration. Senolytics removed aged dysfunctional cardiac stem/progenitor cells (CSCs), relieving healthy CSCs with normal proliferative and cardiomyogenic differentiation potential. In conclusions, cardiac senescent cells accumulate in the aged female hearts. Removing senescent cells is a key therapeutic target for efficient repair of the aged female heart.



中文翻译:

衰老细胞的药理清除改善了雌性老年小鼠心肌梗死后的心脏重塑和功能

心血管疾病 (CVD) 主要是一种衰老性疾病。存在重要的性别差异,并且这种按年龄划分的相互作用影响 CVD 发展和进展的机制仍然难以捉摸。因此,尚不清楚细胞衰老是雄性心脏衰老的一个主要特征,是否也是雌性衰老小鼠心脏的一个重要特征,以及衰老清除化合物 senolytics 是否促进心肌梗死 (MI) 后的心肌修复和再生。年迈的雌性小鼠。为此,对 MI 后 22-24 个月大的 C57BL/6 雌性小鼠施用两种 senolytics、达沙替尼和槲皮素 (D+Q) 的组合或仅施用它们的载体。D+Q 改善了 MI 后的整体左心室功能和心肌性能,女性心脏老化的特征是心脏衰老细胞的积累,MI 进一步增加了这些细胞。尽管它们具有终末分化特性,但在女性中,心肌细胞也会随着年龄的增长而出现衰老表型。D+Q 去除衰老的心脏非肌细胞和肌细胞,改善心脏重塑和再生。Senolytics 去除了老化的功能失调的心脏干/祖细胞 (CSC),减轻了具有正常增殖和心肌分化潜能的健康 CSC。总之,心脏衰老细胞在老年女性心脏中积累。去除衰老细胞是有效修复老年女性心脏的关键治疗靶点。尽管它们具有终末分化特性,但在女性中,心肌细胞也会随着年龄的增长而出现衰老表型。D+Q 去除衰老的心脏非肌细胞和肌细胞,改善心脏重塑和再生。Senolytics 去除了老化的功能失调的心脏干/祖细胞 (CSC),减轻了具有正常增殖和心肌分化潜能的健康 CSC。总之,心脏衰老细胞在老年女性心脏中积累。去除衰老细胞是有效修复老年女性心脏的关键治疗靶点。尽管它们具有终末分化特性,但在女性中,心肌细胞也会随着年龄的增长而出现衰老表型。D+Q 去除衰老的心脏非肌细胞和肌细胞,改善心脏重塑和再生。Senolytics 去除了老化的功能失调的心脏干/祖细胞 (CSC),减轻了具有正常增殖和心肌分化潜能的健康 CSC。总之,心脏衰老细胞在老年女性心脏中积累。去除衰老细胞是有效修复老年女性心脏的关键治疗靶点。减轻具有正常增殖和心肌分化潜能的健康 CSCs。总之,心脏衰老细胞在老年女性心脏中积累。去除衰老细胞是有效修复老年女性心脏的关键治疗靶点。减轻具有正常增殖和心肌分化潜能的健康 CSCs。总之,心脏衰老细胞在老年女性心脏中积累。去除衰老细胞是有效修复老年女性心脏的关键治疗靶点。

更新日期:2022-09-20
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