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Heterochromatin protein 1γ overexpression in P19 embryonal carcinoma cells elicits spontaneous differentiation into the three germ layers.

Abstract：

:P19 embryonal carcinoma (EC) cells are pluripotent stem cells and have numerous morphological and biochemical properties in common with embryonic stem (ES) cells. However, P19 cells differentiate very ineffectively as embryoid bodies (EBs) without the specific chemical inducers whereas ES cells exhibit spontaneous differentiation to the three germ layers. Recently the heterochromatin protein 1 (HP1) family protein HP1γ, which is an epigenetic modulator that binds histone H3 methylated at lysine 9, is shown to be associated with the progression from pluripotent to differentiated status in ES cells. Therefore, to study the role of HP1γ in the differentiation capacity of P19 cells, we have established a HP1γ-overexpressing P19 cell line (HPlγ-P19). Similar to the parental P19 cells, undifferentiated HP1γ-P19 cells continued to express pluripotency marker genes. However, HP1γ-P19 cells exhibited significant morphological differentiation including beating cardiomyocytes, as well as Tuj1-positive neuronal cells and Sox17-positive endodermal cells after EB formation under a normal culture condition. Moreover, real-time RT-qPCR analysis revealed that HP1γ-P19 EB cells expressed various differentiation marker genes. Thus, HP1γ-P19 cells could give rise to all three germ layers in EBs without any drug treatment. Therefore, HP1γ affects the spontaneous differentiation potential of P19 cells, and might play major roles in the decision of cell fates in pluripotent stem cells.

journal_name

Biochem Biophys Res Commun

journal_title

Biochemical and biophysical research communications

authors

Morikawa K,Ikeda N,Hisatome I,Shirayoshi Y

doi

10.1016/j.bbrc.2012.12.128

subject

Has Abstract

pub_date

2013-02-08 00:00:00

pages

225-31

issue

2

eissn

0006-291X

issn

1090-2104

pii

S0006-291X(13)00022-3

journal_volume

431

pub_type

杂志文章

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