基因组辅导体HIRA,前列细胞白血病蛋白和p62/SQSTM1协调调节细胞衰老期间的炎症
相关实验视频
Updated: Jun 15, 2025

Techniques to Induce and Quantify Cellular Senescence
Published on: May 1, 2017
Nirmalya Dasgupta1, Xue Lei1, Christina Huan Shi1
1Sanford Burnham Prebys Medical Discovery Institute, 10901 N Torrey Pines Road, La Jolla, CA 92037, USA.
细胞衰老,衰老的原因,涉及一个炎症分泌表型 (SASP). 研究人员发现,HIRA和PML蛋白对SASP至关重要,通过一种涉及细胞质色素碎片和cGAS-STING信号级联的新途径起作用.
科学领域:
- 细胞生物学 细胞生物学
- 衰老的研究研究.
- 免疫学 免疫学 免疫学
背景情况:
- 细胞衰老是一种稳定的细胞循环停止状态,有助于衰老,并以衰老相关的分泌表型 (SASP) 为特征.
- 衰老细胞中的细胞质色素碎片 (CCF) 通过cGAS/STING抗病毒途径触发SASP.
- 亲细胞白血病 (PML) 蛋白质形成核体 (NBs),参与衰老和抗病毒反应,HIRA伴侣在衰老细胞中定位到这些NBs.
研究的目的:
- 研究HIRA和PML蛋白在调节SASP中的作用.
- 阐明HIRA影响SASP的分子机制.
- 了解HIRA,PML和SASP法规之间的相互作用.
主要方法:
- 研究了HIRA和PML对于SASP表达的必要性.
- 在衰老细胞中分析了HIRA到PML核体 (NBs) 的局部化.
- 检查了HIRA激活的信号通路,包括CCF,cGAS-STING-TBK1-NF-κB.
- 研究了HIRA和自调节器p62/SQSTM1.2之间的相互作用.
主要成果:
- HIRA和PML对于SASP表达至关重要,这取决于HIRA对PMLNBs的局部化.
- HIRA通过一个CCF-cGAS-STING-TBK1-NF-κB通路激活SASP,独立于它的基因素伴侣功能.
- HIRA在物理上与p62/SQSTM1相互作用,p62/SQSTM1是一个自调节器,它会对SASP产生负面影响.
- HIRA和p62在PML NBs中共同定位,在那里它们对SASP的对抗性调节受到空间控制.
结论:
- 在SASP的监管中,HIRA和PML发挥着至关重要的作用.
- PML核体作为空间组织和HIRA和p62对SASP的对抗性监管的平台.
- 在SASP激活中HIRA的功能独立于其在基因素H3.3沉积中的作用,突出显示了一种新的非正规功能.
更多相关视频
13:59A Quantitative Measurement of Reactive Oxygen Species and Senescence-associated Secretory Phenotype in Normal Human Fibroblasts During Oncogene-induced Senescence
Published on: August 12, 2018
08:52Measurement of Protein Turnover Rates in Senescent and Non-Dividing Cultured Cells with Metabolic Labeling and Mass Spectrometry
Published on: April 6, 2022
相关概念视频
Regulation of Hematopoietic Stem Cells
Regulation of the Unfolded Protein Response
Inflammatory Response
Inflammation can be triggered by various stimuli, such as impact, abrasion, chemical irritation, infections, and extreme hot or cold temperatures. These can damage cells and connective tissue fibers,...
Abnormal Proliferation
Negative Regulator Molecules
Chromatin Modification in iPS Cells
Compact chromatin makes reprogramming difficult. Enzymes, such as histone demethylases and acetyltransferases, are often added during reprogramming to loosen the chromatin, making the DNA more accessible to transcription factors. Molecules that inhibit histone...