The penultimate effectors of the Hippo signaling pathways YAP and TAZ, are transcriptional co-activator proteins that play key roles in many diverse biological processes, ranging from cell proliferation, tumorigenesis, mechanosensing and cell lineage fate determination, to wound healing and regeneration. In this review, we discuss the regulatory mechanisms by which YAP/TAZ control stem/progenitor cell differentiation into the various major lineages that are of interest to tissue engineering and regenerative medicine applications. Of particular interest is the key role of YAP/TAZ in maintaining the delicate balance between quiescence, self-renewal, proliferation and differentiation of endogenous adult stem cells within various tissues/organs during early development, normal homeostasis and regeneration/healing. Finally, we will consider how increasing knowledge of YAP/TAZ signaling might influence the trajectory of future progress in regenerative medicine.
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http://dx.doi.org/10.3389/fcell.2020.00735 | DOI Listing |
Elife
January 2025
Department of Diabetes and Metabolic Diseases, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan.
Cigarette smoking is a well-known risk factor inducing the development and progression of various diseases. Nicotine (NIC) is the major constituent of cigarette smoke. However, knowledge of the mechanism underlying the NIC-regulated stem cell functions is limited.
View Article and Find Full Text PDFiScience
December 2024
Department of Molecular Physiology & Biophysics, Vanderbilt University, Nashville, TN, USA.
Increased blood amino acid levels (hyperaminoacidemia) stimulate pancreas expansion by unclear mechanisms. Here, by genetic and pharmacological disruption of glucagon receptor (GCGR) in mice and zebrafish, we found that the ensuing hyperaminoacidemia promotes pancreatic acinar cell proliferation and cell hypertrophy, which can be mitigated by a low protein diet in mice. In addition to mammalian target of rapamycin complex 1 (mTORC1) signaling, acinar cell proliferation required , the most highly expressed amino acid transporter gene in both species.
View Article and Find Full Text PDFMol Biol Rep
December 2024
State Key Laboratory of Cell Differentiation and Regulation, College of Life Sciences, Henan Normal University, Xinxiang, 453007, China.
Yes-associated protein (YAP) and transcriptional coactivator with PDZ-binding motif (TAZ) are key downstream effectors of the Hippo pathway that regulate organ size, tissue homeostasis, and cancer development. YAP/TAZ play crucial regulatory roles in organ growth, cell proliferation, cell renewal, and regeneration. Mechanistically, YAP/TAZ influence the occurrence and progression of liver regeneration (LR) through various signaling pathways, including Notch, Wnt/β-catenin, TGF-β/Smad.
View Article and Find Full Text PDFActa Biomater
December 2024
Department of Orthopaedic Surgery, Washington University School of Medicine, St. Louis, MO 63110, USA; Shriners Hospitals for Children, St. Louis, MO 63110, USA; Center of Regenerative Medicine, Washington University School of Medicine, St. Louis, MO 63110, USA; Department of Mechanical Engineering, Washington University, St. Louis, MO 63130, USA; Cytex Therapeutics, Inc., Durham, NC 27704, USA. Electronic address:
Acta Biomater
November 2024
Department of Chemical and Biological Engineering, University of Colorado Boulder, Boulder CO, 80303, USA; The BioFrontiers Institute, University of Colorado Boulder, Boulder, CO 80303, USA. Electronic address:
Quiescent skeletal muscle satellite cells (SCs) located on myofibers activate in response to muscle injury to regenerate muscle; however, identifying the role of specific matrix signals on SC behavior in vivo is difficult. Therefore, we developed a viscoelastic hydrogel with tunable properties to encapsulate myofibers while maintaining stem cell niche polarity and SC-myofiber interactions to investigate how matrix signals, including viscoelasticity and the integrin-binding ligand arginyl-glycyl-aspartic acid (RGD), influence SC behavior during muscle regeneration. Viscoelastic hydrogels support myofiber culture while preserving SC stemness for up to 72 hours post-encapsulation, minimizing myofiber hypercontraction and SC hyperproliferation compared to Matrigel.
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