Unknown

Dataset Information

0

Mitoribosomal Deregulation Drives Senescence via TPP1-Mediated Telomere Deprotection.


ABSTRACT: While mitochondrial bioenergetic deregulation has long been implicated in cellular senescence, its mechanistic involvement remains unclear. By leveraging diverse mitochondria-related gene expression profiles derived from two different cellular senescence models of human diploid fibroblasts, we found that the expression of mitoribosomal proteins (MRPs) was generally decreased during the early-to-middle transition prior to the exhibition of noticeable SA-β-gal activity. Suppressed expression patterns of the identified senescence-associated MRP signatures (SA-MRPs) were validated in aged human cells and rat and mouse skin tissues and in aging mouse fibroblasts at single-cell resolution. TIN2- and POT1-interaction protein (TPP1) was concurrently suppressed, which induced senescence, accompanied by telomere DNA damage. Lastly, we show that SA-MRP deregulation could be a potential upstream regulator of TPP1 suppression. Our results indicate that mitoribosomal deregulation could represent an early event initiating mitochondrial dysfunction and serve as a primary driver of cellular senescence and an upstream regulator of shelterin-mediated telomere deprotection.

SUBMITTER: Min S 

PROVIDER: S-EPMC9265344 | biostudies-literature |

REPOSITORIES: biostudies-literature

Similar Datasets

| S-EPMC6396144 | biostudies-literature
| S-EPMC4051222 | biostudies-literature
| S-EPMC7385035 | biostudies-literature
2019-02-06 | GSE95822 | GEO
| S-EPMC10558736 | biostudies-literature
| S-EPMC5499835 | biostudies-literature
| S-EPMC3222871 | biostudies-other
| S-EPMC5675034 | biostudies-literature
| S-EPMC8599762 | biostudies-literature
| S-EPMC6876245 | biostudies-literature