Coordinated repression of pro-differentiation genes via P-bodies and transcription maintains Drosophila intestinal stem cell identity.

Coordinated repression of pro-differentiation genes via P-bodies and transcription maintains Drosophila intestinal stem cell identity.
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DOI:
10.1016/j.cub.2021.11.032
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发表时间:
2022-01-24
期刊:
Current biology : CB
影响因子:
--
通讯作者:
Sokol NS
Sokol NS
中科院分区:
其他
文献类型:
--
作者:
Buddika K;Huang YT;Ariyapala IS;Butrum-Griffith A;Norrell SA;O'Connor AM;Patel VK;Rector SA;Slovan M;Sokolowski M;Kato Y;Nakamura A;Sokol NS

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The role of Processing bodies (P-bodies), key sites of post-transcriptional control, in adult stem cells remains poorly understood. Here, we report that adult Drosophila intestinal stem cells, but not surrounding differentiated cells such as absorptive Enterocytes (ECs), harbor P-bodies that contain Drosophila orthologs of mammalian P-body components DDX6, EDC3, EDC4 and LSM14A/B. A targeted RNAi screen in intestinal progenitor cells identified 39 previously known and 64 novel P-body regulators, including Patr-1, a gene necessary for P-body assembly. Loss of Patr-1-dependent P-bodies leads to a loss of stem cells that is associated with inappropriate expression of EC-fate gene nubbin. Transcriptomic analysis of progenitor cells identifies a cadre of such weakly transcribed pro-differentiation transcripts that are elevated after P-body loss. Altogether, this study identifies a P-body-dependent repression activity that coordinates with known transcriptional repression programs to maintain a population of in vivo stem cells in a state primed for differentiation. How stem cells are maintained in adult tissues is a fundamental question. In a new study, Buddika et al., show that Drosophila intestinal stem cells contain P-bodies that repress the expression of weakly transcribed pro-differentiation genes to repress precocious differentiation and thereby ensure the maintenance of this cell.
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