Abstract

Human pluripotent stem cells (hPSCs) can self-renew indefinitely to generate cells like themselves with a normal karyotype and differentiate into other types of cells when stimulated with a proper set of internal and external signals. hPSCs including human embryonic stem cells (hESCs) and induced pluripotent stem cells (iPSCs) are an alternative approach toward stem cell biology, drug discovery, disease modeling, and regenerative medicine. hESCs are commonly derived from the inner cell mass of preimplantation embryos and can maintain their pluripotency in appropriate culture media. The Hippo pathway is a major integrator of cell surface-mediated signals and plays an essential role in regulating hESCs function. Yes-associated protein (YAP) and TAZ (PDZ binding motif) are critical downstream transcriptional coactivators in the Hippo pathway. The culture conditions have effects on the cytoplasmic or nuclear YAP/TAZ localization. Also, the activity of Hippo pathway is influenced by cell density, mechanical tension, and biochemical signals. In this review article, we summarize the function of YAP/TAZ and focus on the regulation of YAP/TAZ in self-renewal and differentiation of hESCs.

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