Senescent cells suppress innate smooth muscle cell repair functions in atherosclerosis.

Senescent cells suppress innate smooth muscle cell repair functions in atherosclerosis.
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DOI:
10.1038/s43587-021-00089-5
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发表时间:
2021-08
期刊:
Nature aging
影响因子:
--
通讯作者:
van Deursen JM
van Deursen JM
中科院分区:
其他
文献类型:
--
作者:
Childs BG;Zhang C;Shuja F;Sturmlechner I;Trewartha S;Fierro Velasco R;Baker D;Li H;van Deursen JM

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衰老细胞(SNCs)使纤维帽退化,纤维帽通常可以防止动脉粥样硬化斑块破裂,这是心肌梗死和中风的主要原因。在这里,我们探索了使用药理学或转基因方法清除Ldlr - / -小鼠动脉粥样硬化模型中的SNCs的潜在机制。SNC清除增强了高度晚期病变中完全恶化的纤维帽,这可以通过恢复的血管平滑肌细胞(VSMC)数量、弹性蛋白含量和总纤维帽厚度来证明。我们发现,在动脉粥样硬化斑块正下方的动脉壁第一个纤维间隙中,SNCs抑制了VSMC的促迁移表型转换,从而限制了内侧VSMC的病变进入纤维帽组装或增强。SNCs通过分泌胰岛素样生长因子结合蛋白3 (Igfbp3)来拮抗IGF-1。这些数据表明,间歇性使用抗衰老药物或抑制IGFBP-3与降脂药物联合使用可能对动脉粥样硬化提供治疗益处。
Senescent cells (SNCs) degenerate the fibrous cap that normally prevents atherogenic plaque rupture, a leading cause of myocardial infarction and stroke. Here we explored the underlying mechanism using pharmacological or transgenic approaches to clear SNCs in the Ldlr−/− mouse model of atherosclerosis. SNC clearance reinforced fully deteriorated fibrous caps in highly advanced lesions, as evidenced by restored vascular smooth muscle cell (VSMC) numbers, elastin content, and overall cap thickness. We found that SNCs inhibit VSMC promigratory phenotype switching in the first interfiber space of the arterial wall directly beneath atherosclerotic plaque, thereby limiting lesion entry of medial VSMCs for fibrous cap assembly or reinforcement. SNCs do so by antagonizing IGF-1 through the secretion of insulin-like growth factor-binding protein 3 (Igfbp3). These data indicate that the intermittent use of senolytic agents or IGFBP-3 inhibition in combination with lipid lowering drugs may provide therapeutic benefit in atherosclerosis.
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影响因子: --
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