凋亡囊泡介导的衰老细胞清除需要机械加载。

Apoptotic vesicle-mediated senolytics requires mechanical loading.

机构信息

Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology & National Center for Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing 100081, China.

Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, South China Center of Craniofacial Stem Cell Research, Guangdong Provincial Key Laboratory of Stomatology, Guangzhou 510055, China.

出版信息

Theranostics. 2024 Aug 6;14(12):4730-4746. doi: 10.7150/thno.98763. eCollection 2024.

Abstract

Mechanical force plays crucial roles in extracellular vesicle biogenesis, release, composition and activity. However, it is unknown whether mechanical force regulates apoptotic vesicle (apoV) production. The effects of mechanical unloading on extracellular vesicles of bone marrow were evaluated through morphology, size distribution, yield, and protein mass spectrometry analysis using hindlimb unloading (HU) mouse model. Apoptosis resistance and aging related phenotype were assessed using HU mouse model and cell microgravity model The therapeutic effects of apoVs on HU mouse model were assessed by using microcomputed tomography, histochemical and immunohistochemical, as well as histomorphometry analyses. SiRNA and chemicals were used for gain and loss-of-function assay. In this study, we show that loss of mechanical force led to cellular apoptotic resistance and aging related phenotype, thus reducing the number of apoVs in the circulation due to down-regulated expression of Piezo1 and reduced calcium influx. And systemic infusion of apoVs was able to rescue Piezo1 expression and calcium influx, thereby, rescuing mechanical unloading-induced cellular apoptotic resistance, senescent cell accumulation. This study identified a previously unknown role of mechanical force in maintaining apoptotic homeostasis and eliminating senescent cells. Systemic infusion of mesenchymal stem cell-derived apoVs can effectively rescue apoptotic resistance and eliminate senescent cells in mechanical unloading mice.

摘要

机械力在外泌体的发生、释放、组成和活性中起着至关重要的作用。然而,机械力是否调节凋亡小体(apoV)的产生尚不清楚。通过使用后肢去负荷(HU)小鼠模型,通过形态学、大小分布、产量和蛋白质质谱分析来评估机械卸载对骨髓细胞外囊泡的影响。使用 HU 小鼠模型和细胞微重力模型评估细胞凋亡抵抗和衰老相关表型。使用 microCT、组织化学和免疫组织化学以及组织形态计量学分析评估 apoVs 对 HU 小鼠模型的治疗效果。使用 siRNA 和化学物质进行功能获得和功能丧失测定。在这项研究中,我们表明,失去机械力会导致细胞凋亡抵抗和衰老相关表型,从而由于 Piezo1 表达下调和钙内流减少而减少循环中的 apoV 数量。全身输注 apoVs 能够挽救 Piezo1 表达和钙内流,从而挽救机械去负荷引起的细胞凋亡抵抗和衰老细胞积累。这项研究确定了机械力在维持细胞凋亡平衡和消除衰老细胞方面的一个以前未知的作用。间充质干细胞衍生的 apoVs 的全身输注可有效挽救机械去负荷小鼠的细胞凋亡抵抗并消除衰老细胞。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0e0c/11373628/b1149c96247f/thnov14p4730g001.jpg

文献AI研究员

20分钟写一篇综述,助力文献阅读效率提升50倍

立即体验

用中文搜PubMed

大模型驱动的PubMed中文搜索引擎

马上搜索