Generation and live imaging of an endogenous Cdx2 reporter mouse line.

Generation and live imaging of an endogenous Cdx2 reporter mouse line.
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DOI:
10.1002/dvg.22049
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发表时间:
2012-10
期刊:
影响因子:
1.5
通讯作者:
Zheng, Yixian
Zheng, Yixian
中科院分区:
生物学4区
文献类型:
--
作者:
McDole, Katie;Zheng, Yixian

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To understand cell fate specification and maintenance during development, it is essential to visualize both lineage markers and cell behaviors in real time using endogenous markers to report cell fate. We have generated a reporter line in which eGFP is fused to the endogenous locus of Cdx2, a transcription factor essential for trophectoderm specification, allowing us to visualize cell fate decisions in the pre-implantation mouse embryo. We utilized two-photon laser scanning microscopy (TPLSM) to visualize expression of the endogenous Cdx2 fusion protein, and show that Cdx2 undergoes phases of up-regulation. Additionally, we show that as late as the 32-cell stage, outer trophectoderm cells may change their fates by migrating inward and losing Cdx2 expression. Furthermore, the tools and techniques we report allow for dual-colored imaging which will greatly facilitate the study of pre-implantation development.
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