Department of Stem Cell Biology and Histology, Tohoku University Graduate School of Medicine, Sendai, Japan.
Department of Experimental Medicine, Luigi Vanvitelli Campania University, Naples, Italy.
Cell Commun Signal. 2023 Sep 28;21(1):262. doi: 10.1186/s12964-023-01280-4.
DNA damage resulting from genotoxic injury can initiate cellular senescence, a state characterized by alterations in cellular metabolism, lysosomal activity, and the secretion of factors collectively known as the senescence-associated secretory phenotype (SASP). Senescence can have beneficial effects on our bodies, such as anti-cancer properties, wound healing, and tissue development, which are attributed to the SASP produced by senescent cells in their intermediate stages. However, senescence can also promote cancer and aging, primarily due to the pro-inflammatory activity of SASP.Studying senescence is complex due to various factors involved. Genotoxic stimuli cause random damage to cellular macromolecules, leading to variations in the senescent phenotype from cell to cell, despite a shared program. Furthermore, senescence is a dynamic process that cannot be analyzed as a static endpoint, adding further complexity.Investigating SASP is particularly intriguing as it reveals how a senescence process triggered in a few cells can spread to many others, resulting in either positive or negative consequences for health. In our study, we conducted a meta-analysis of the protein content of SASP obtained from different research groups, including our own. We categorized the collected omic data based on: i) cell type, ii) harmful agent, and iii) senescence stage (early and late senescence).By employing Gene Ontology and Network analysis on the omic data, we identified common and specific features of different senescent phenotypes. This research has the potential to pave the way for the development of new senotherapeutic drugs aimed at combating the negative consequences associated with the senescence process. Video Abstract.
DNA 损伤可引发遗传毒性损伤导致的细胞衰老,这是一种以细胞代谢、溶酶体活性和被统称为衰老相关分泌表型(SASP)的因子分泌改变为特征的状态。衰老对我们的身体有有益的影响,如抗癌特性、伤口愈合和组织发育,这归因于衰老细胞在中期产生的 SASP。然而,衰老也会促进癌症和衰老,主要是由于 SASP 的促炎活性。由于涉及的各种因素,研究衰老非常复杂。遗传毒性刺激会导致细胞大分子的随机损伤,导致尽管存在共享程序,但每个细胞的衰老表型都存在差异。此外,衰老是一个动态过程,不能作为静态终点进行分析,这增加了复杂性。研究 SASP 特别有趣,因为它揭示了在少数细胞中触发的衰老过程如何传播到许多其他细胞,从而对健康产生积极或消极的后果。在我们的研究中,我们对来自不同研究小组(包括我们自己的小组)获得的 SASP 蛋白质含量进行了荟萃分析。我们根据以下三个方面对收集到的组学数据进行了分类:i)细胞类型,ii)有害剂,iii)衰老阶段(早期和晚期衰老)。通过对组学数据进行基因本体论和网络分析,我们确定了不同衰老表型的共同和特定特征。这项研究有可能为开发新的抗衰老药物铺平道路,这些药物旨在对抗与衰老过程相关的负面后果。视频摘要。
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