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Hepatocyte Cell Cycle Progression Depends on a Transcriptional Repressor Cascade Downstream of Wnt Signaling

Jin, Y.; Anbarchian, T.; Wu, P.; Sarkar, A.; Fish, M.; Nusse, R.

2021-10-16 cell biology
10.1101/2021.10.15.464616 bioRxiv
Show abstract

Cell proliferation is tightly controlled by inhibitors that block cell cycle progression until growth signals relieve this inhibition. In several tissues including the liver, transcriptional repressors such as E2F7 and E2F8 function as inhibitors of mitosis and promote polyploidy, but how growth factors release these mitotic inhibitors to facilitate cell cycle progression is unknown. We describe here a newly identified mechanism of cell division control in which Wnt/{beta}catenin signaling in the postnatal liver maintains active hepatocyte proliferation through Tbx3, a Wnt target gene. TBX3 directly represses transcription of E2f7 and E2f8, promoting a low ploidy state and cell cycle progression. This sequential transcriptional repressor cascade, initiated by Wnts, provides a new paradigm for exploring how a commonly active developmental signal impacts cell cycle completion.

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"Similar papers" are the closest papers from that journal in the model's embedding space. They show what the match is built on, but the ranking comes mostly from a classifier over the whole training set, not from these examples alone.