Department of Microbiology and Immunology, Indiana University School of Medicine, Indianapolis, Indiana 46202, USA.
Stem Cells Dev. 2012 Apr 10;21(6):829-33. doi: 10.1089/scd.2011.0512. Epub 2012 Jan 26.
HIV-1 Tat-interacting protein of 110 kDa [Tip110; p110(nrb)/SART3/p110] is an RNA binding nuclear protein implicated in regulation of HIV-1 gene and host gene transcription, pre-mRNA splicing, and cancer immunology. Recently, we demonstrated a role for Tip110 in regulation of hematopoiesis. Here, we show that TIP110 is also expressed in human embryonic stem cells (hESCs) and expression was decreased with differentiation of these ESCs. TIP110 was found, through up- and down-modulation of expression of Tip110, to be important in maintaining pluripotent factor (NANOG, OCT4, and SOX2) expression in and pluripotency of hESCs, although the mechanisms involved and whether the Tip110 effects are direct remain to be determined.
HIV-1 转录激活蛋白 110kDa 相互作用蛋白(Tip110;p110(nrb)/SART3/p110)是一种 RNA 结合核蛋白,参与调节 HIV-1 基因和宿主基因转录、前体 mRNA 剪接以及癌症免疫学。最近,我们证明了 Tip110 在调节造血中的作用。在这里,我们显示 Tip110 也在人胚胎干细胞(hESCs)中表达,并且随着这些 ESCs 的分化,其表达减少。通过上调和下调 Tip110 的表达,发现 TIP110 对于维持 hESCs 中的多能因子(NANOG、OCT4 和 SOX2)表达和多能性很重要,尽管涉及的机制以及 Tip110 作用是否直接仍有待确定。