| Literature DB >> 19556507 |
Ewa Wandzioch1, Kenneth S Zaret.
Abstract
Studies of the formation of pancreas and liver progenitors have focused on individual inductive signals and cellular responses. Here, we investigated how bone morphogenetic protein, transforming growth factor-beta (TGFbeta), and fibroblast growth factor signaling pathways converge on the earliest genes that elicit pancreas and liver induction in mouse embryos. The inductive network was found to be dynamic; it changed within hours. Different signals functioned in parallel to induce different early genes, and two permutations of signals induced liver progenitor domains, which revealed flexibility in cell programming. Also, the specification of pancreas and liver progenitors was restricted by the TGFbeta pathway. These findings may enhance progenitor cell specification from stem cells for biomedical purposes and can help explain incomplete programming in stem cell differentiation protocols.Entities:
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Year: 2009 PMID: 19556507 PMCID: PMC2771431 DOI: 10.1126/science.1174497
Source DB: PubMed Journal: Science ISSN: 0036-8075 Impact factor: 47.728