Regulatory expression of Brachyury and Goosecoid in P19 embryonal carcinoma cells

Journal of Cellular Biochemistry
Kohei NakayaMasayuki Funaba

Abstract

Mouse P19 embryonal carcinoma cells can differentiate into various cell types depending on culture conditions. Here we show that the expression of the mesodermal genes Brachyury (Bra) and Goosecoid (Gsc) are under regulatory control in P19 cells. When P19 cells were cultured in a tissue culture dish in the presence of serum, Bra and Gsc were unexpectedly expressed. Expression of Bra and Gsc was greatly reduced with culture time, and expression levels at 144 h of culture were below 25% those at 48 h of culture. Members of the Tgf-beta family such as Activin and Nodal have been known to up-regulate expression of mesodermal genes. Treatment with SB431542, an Alk4/5/7 inhibitor, decreased Bra and Gsc in a dose-dependent manner, whereas it induced the expression of the neuroectodermal genes Mash-1 and Pax-6. Quantitative RT-PCR and dsRNAi transfection indicated Nodal as a possible ligand responsible for the regulation of Bra and Gsc. In addition, exogenous Nodal increased expression of Bra and Gsc in a dose-dependent manner. Serum concentration in culture medium positively related to expression of Nodal, Bra, Gsc, and Cripto, which encodes a membrane-tethered protein required for Nodal signaling. Addition of the culture supernatant ...Continue Reading

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Citations

Aug 28, 2009·Cell Biochemistry and Function·Kohei NakayaMasaru Murakami
Sep 20, 2011·Biochemical and Biophysical Research Communications·Diego P AguiarJosé G Abreu

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