Genotoxic stress in constitutive trisomies induces autophagy and the innate immune response via the cGAS-STING pathway.

ABSTRACT: Gain of even a single chromosome leads to changes in human cell physiology and uniform perturbations of specific cellular processes, including downregulation of DNA replication pathway, upregulation of autophagy and lysosomal degradation, and constitutive activation of the type I interferon response. Little is known about the molecular mechanisms underlying these changes. We show that the constitutive nuclear localization of TFEB, a transcription factor that activates the expression of autophagy and lysosomal genes, is characteristic of human trisomic cells. Constitutive nuclear localization of TFEB in trisomic cells is independent of mTORC1 signaling, but depends on the cGAS-STING activation. Trisomic cells accumulate cytoplasmic dsDNA, which activates the cGAS-STING signaling cascade, th

SUBMITTER: Krivega M 

PROVIDER: S-EPMC8253785 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature