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TRAF-like Proteins Regulate Cellular Survival in the Planarian Schmidtea mediterranea.


ABSTRACT: Tissue homeostasis relies on the timely renewal of cells that have been damaged or have surpassed their biological age. Nonetheless, the underlying molecular mechanism coordinating tissue renewal is unknown. The planarian Schmidtea mediterranea harbors a large population of stem cells that continuously divide to support the restoration of tissues throughout the body. Here, we identify that TNF Receptor Associated Factors (TRAFs) play critical roles in cellular survival during tissue repair in S. mediterranea. Disruption with RNA-interference of TRAF signaling results in rapid morphological defects and lethality within 2 weeks. The TRAF phenotype is accompanied by an increased number of mitoses and cell death. Our results also reveal TRAF signaling is required for proper regeneration of the nervous system. Taken together, we find functional conservation of TRAF-like proteins in S. mediterranea as they act as crucial regulators of cellular survival during tissue homeostasis and regeneration.

SUBMITTER: Ziman B 

PROVIDER: S-EPMC7586133 | biostudies-literature | 2020 Nov

REPOSITORIES: biostudies-literature

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TRAF-like Proteins Regulate Cellular Survival in the Planarian <i>Schmidtea mediterranea</i>.

Ziman Benjamin B   Barghouth Paul G PG   Maciel Eli Isael EI   Oviedo Néstor J NJ  

iScience 20201009 11


Tissue homeostasis relies on the timely renewal of cells that have been damaged or have surpassed their biological age. Nonetheless, the underlying molecular mechanism coordinating tissue renewal is unknown. The planarian <i>Schmidtea mediterranea</i> harbors a large population of stem cells that continuously divide to support the restoration of tissues throughout the body. Here, we identify that TNF Receptor Associated Factors (TRAFs) play critical roles in cellular survival during tissue repai  ...[more]

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