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100 1 _ |a Niedworok, Patrizia
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245 _ _ |a BCL-11 enables adaptive stress responses to environmental challenges.
260 _ _ |a St. Louis
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520 _ _ |a Insulin/IGF-1 signaling (IIS) is a master regulator of metabolism, stress resilience, and cell homeostasis in multicellular organisms. In the nematode Caenorhabditis elegans, DAF-2 regulates dauer diapause, animal growth, and lifespan extension in a DAF-16/FOXO-dependent manner. Here we investigated IIS in animals expressing pathogenic variants of BCL-11, an evolutionarily conserved transcription factor that has been implicated in human neurodevelopmental disorders. We found that hypomorphic bcl-11 mutations have a limited impact on C. elegans growth and survival under standard growth conditions. On the contrary, BCL-11 deficiency compromises the cytoprotective properties of daf-2 signaling upon animal exposure to stress. During embryonic development, daf-16 loss of function rescues egg hatching defects in daf-2;bcl-11 mutants, suggesting a transcriptional interplay between BCL-11 and DAF-16 in IIS-deficient animals. Together, our data suggest that BCL-11 actively regulates transcription during development, while in adult animals it is recruited in response to environmental insults to enhance stress resilience.
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