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Differential gene expression analysis identified determinants of cell fate plasticity during radiation-induced regeneration in Drosophila.

ABSTRACT: Ionizing radiation (IR) is used to treat half of all cancer patients because of its ability to kill cells. IR, however, can induce stem cell-like properties in non-stem cancer cells, potentiating tumor regrowth and reduced therapeutic success. We identified previously a subpopulation of cells in Drosophila larval wing discs that exhibit IR-induced stem cell-like properties. These cells reside in the future wing hinge, are resistant to IR-induced apoptosis, and are capable of translocating, changing fate, and participating in regenerating the pouch that suffers more IR-induced apoptosis. We used here a combination of lineage tracing, FACS-sorting of cells that change fate, genome-wide RNAseq, and functional testing of 42 genes, to identify two key changes that are required cell-autonomously for IR-induced hinge-to-pouch fate change: (1) repression of hinge determinants Wg (Drosophila Wnt1) and conserved zinc-finger transcription factor Zfh2 and (2) upregulation of three ribosome biogenesis factors. Additional data indicate a role for Myc, a transcriptional activator of ribosome biogenesis genes, in the process. These results provide a molecular understanding of IR-induced cell fate plasticity that may be leveraged to improve radiation therapy.

SUBMITTER: Ledru M

PROVIDER: S-EPMC8769364 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Differential gene expression analysis identified determinants of cell fate plasticity during radiation-induced regeneration in Drosophila

Project description:We used here a combination of lineage tracing, FACS and genome-wide RNAseq to identify two key changes that accompany hinge-to-pouch fate change: (1) repression of hinge determinants and (2) upregulation of ribosome biogenesis.

2021-12-19 | GSE182782 | GEO

Differential gene expression analysis identified determinants of cell fate plasticity during radiation-induced regeneration in Drosophila

Project description:Differential gene expression analysis identified determinants of cell fate plasticity during radiation-induced regeneration in Drosophila

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