期刊
DEVELOPMENT
卷 144, 期 1, 页码 106-114出版社
COMPANY OF BIOLOGISTS LTD
DOI: 10.1242/dev.138222
关键词
Cellular senescence; Axolotl; Xenopus; TGF beta; Cement gland; Kidney
资金
- Wellcome Trust
- Medical Research Council [G1000870]
- MRC [G1000870, G0701297] Funding Source: UKRI
- Medical Research Council [G0701297, G1000870, 1341176] Funding Source: researchfish
Cellular senescence, a form of stable cell cycle arrest that is traditionally associated with tumour suppression, has been recently found to occur during mammalian development. Here, we show that cell senescence is an intrinsic part of the developmental programme in amphibians. Programmed senescence occurs in specific structures during defined time windows during amphibian development. It contributes to the physiological degeneration of the amphibian pronephros and to the development of the cement gland and oral cavity. In both contexts, senescence depends on TGF beta but is independent of ERK/MAPK activation. Furthermore, elimination of senescent cells through temporary TGF beta inhibition leads to developmental defects. Our findings uncover conserved and new roles of senescence in vertebrate organogenesis and support the view that cellular senescence may have arisen in evolution as a developmental mechanism.
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