西亚试剂：Robust cellular reprogramming occurs spontaneously during l

Robust cellular reprogramming occurs spontaneously during liver regeneration
 

Kilangsungla Yanger1,2,6,Yiwei Zong1,2,6,Lara R. Maggs1,2,Suzanne N. Shapira1,2,Ravi Maddipati1,2,Nicole M. Aiello1,2,Swan N. Thung3,Rebecca G. Wells1,Linda E. Greenbaum4 andBen Z. Stanger1,2,5,7

Cellular reprogramming—the ability to interconvert distinct cell types with defined factors—is transforming the field of regenerative medicine. However, this phenomenon has rarely been observed in vivo without exogenous factors. Here, we report that activation of Notch, a signaling pathway that mediates lineage segregation during liver development, is sufficient to reprogram hepatocytes into biliary epithelial cells (BECs). Moreover, using lineage tracing, we show that hepatocytes undergo widespread hepatocyte-to-BEC reprogramming following injuries that provoke a biliary response, a process requiring Notch. These results provide direct evidence that mammalian regeneration prompts extensive and dramatic changes in cellular identity under injury conditions。

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