Chemical genetics identifies c-Src as an activator of primitive ectoderm formation in murine embryonic stem cells.

Chemical genetics identifies c-Src as an activator of primitive ectoderm formation in murine embryonic stem cells.
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DOI:
10.1126/scisignal.2000311
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发表时间:
2009-10-13
期刊:
影响因子:
7.3
通讯作者:
Smithgall TE
Smithgall TE
中科院分区:
生物学1区
文献类型:
--
作者:
Meyn MA 3rd;Smithgall TE

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多种Src家族激酶(SFK)存在于鼠胚胎干(mES)细胞中。尽管完全抑制所有SFK活性会阻断mES细胞分化,但仅抑制c-Yes会诱导分化。因此,个别SFKs可能有相反的作用,在调节mES细胞的命运。为了测试这种可能性,我们产生了对非选择性SFK抑制剂具有工程抗性的SFK突变体。一个c-Src突变体,但不是类似的突变体的HCK,LCK,c-Yes,或Fyn的存在下,逆转了与抑制剂治疗相关的分化阻滞,导致形成具有原始外胚层特性的细胞。这些结果表明,不同的SFK信号通路调节mES细胞的命运,并证明原始外胚层的形成是由c-Src的活性调节。
Multiple Src family kinases (SFKs) are present in murine embryonic stem (mES) cells. Whereas complete inhibition of all SFK activity blocks mES cell differentiation, inhibition of only c-Yes induces differentiation. Thus, individual SFKs may have opposing roles in the regulation of mES cell fate. To test this possibility, we generated SFK mutants with engineered resistance to a nonselective SFK inhibitor. The presence of an inhibitor-resistant c-Src mutant, but not analogous mutants of Hck, Lck, c-Yes, or Fyn, reversed the differentiation block associated with inhibitor treatment, resulting in the formation of cells with properties of primitive ectoderm. These results show that distinct SFK signaling pathways regulate mES cell fate and demonstrate that the formation of primitive ectoderm is regulated by the activity of c-Src.
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