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    Biochem Biophys Res Commun. 2008 Oct 17;375(2):256-60. doi: 10.1016/j.bbrc.2008.08.026. Epub 2008 Aug 14.

    Development of stabilin2+ endothelial cells from mouse embryonic stem cells by inhibition of TGFbeta/activin signaling.

    Nonaka H, Watabe T, Saito S, Miyazono K, Miyajima A.

    Source

    Laboratory of Cell Growth and Differentiation, Institute of Molecular and Cellular Biosciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-0032, Japan; Japan Health Sciences Foundation, Chuo-ku, Tokyo, Japan.

    Abstract

    To understand the endothelial cell (EC) development, arterial, venous, and lymphatic EC (LEC) have been successfully induced from embryonic stem cells (ESC). However, tissue-specific EC, such as hepatic sinusoidal EC (HSEC), have never been generated from ESC. Based on the findings that TGFbeta/activin signaling negatively regulates differentiation of both LEC and HSEC, and that HSEC and LEC are distinguishable by the expression of marker genes, we assessed the role of TGFbeta/activin signaling in EC development from ESC. Here we show that the inhibition of TGFbeta/activin signaling by a TGFbeta receptor I (TGFbetaRI) kinase inhibitor increased the expression of Lyve1 and stabilin2 but not podoplanin in CD31+CD34+ EC derived from ESC. EC generated by the inhibition of TGFbetaRI signaling also exhibited stronger endocytic activity than control EC, indicating that their phenotype is similar to fetal HSEC. Our results reveal that TGFbeta/activin signaling negatively regulates the early events of HSEC differentiation.

    PMID:
    18706884
    [PubMed - indexed for MEDLINE]

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