Cited by 1,252Hippo pathway signaling and YAP/TAZDevelopmental Biology and Gene RegulationLiver physiology and pathology

YAP1 increases organ size and expands undifferentiated progenitor cells

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Camargo, Fernando D., Gokhale, Sumita, Johnnidis, Jonathan B., Fu, Dongdong, Bell, George W., Jaenisch, Rudolf, Brummelkamp, Thijn R.·2007·Current Biology

Abstract

The mechanisms that regulate mammalian organ size are poorly understood. It is unclear whether the pathways that control organ size also impinge on stem/progenitor cells. A highly expressed gene in stem cells is YAP1, the ortholog of Drosophila Yorkie, a downstream component of the Hippo pathway. Mutations in components of this pathway produce tissue overgrowth phenotypes in the fly whereas mammalian orthologs, like salvador, merlin, LATS, and YAP1, have been implicated in tumorigenesis. We report here that YAP1 increases organ size and causes aberrant tissue expansion in mice. YAP1 activation reversibly increases liver size more than 4-fold. In the intestine, expression of endogenous YAP1 is restricted to the progenitor/stem cell compartment, and activation of YAP1 expands multipotent undifferentiated progenitor cells, which differentiate upon cessation of YAP1 expression. YAP1 stimulates Notch signaling, and administration of gamma-secretase inhibitors suppressed the intestinal dysplasia caused by YAP1. Human colorectal cancers expressing higher levels of YAP1 share molecular aspects with YAP1-induced dysplastic growth in the mouse. Our data show that the Hippo signaling pathway regulates organ size in mammals and can act on stem cell compartments, indicating a potential link between stem/progenitor cells, organ size, and cancer.

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Crossref · 10.1016/j.cub.2007.10.039

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  • Activated YAP signalling reversibly increased liver size, but its deletion did not affect liver size during homeostasis.

    “While activated YAP signalling reversibly increased liver size,93 its deletion did not affect liver size during homeostasis.57,58,94”
  • The Hippo pathway controls liver size and is commonly amplified in human hepatocellular carcinoma.

    “This pathway controls liver size and is commonly amplified in human hepatocellular carcinoma (Camargo et al., 2007; Zender et al., 2006).”

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Authors
Camargo, F. D., Gokhale, S., Johnnidis, J. B., Fu, D., Bell, G. W., Jaenisch, R., & Brummelkamp, T. R.
Affiliations
Whitehead Institute for Biomedical Research (US)
Corresponding author
  • Camargo, Fernando D.
  • Brummelkamp, Thijn R.
Venue
Current Biology
Publisher
Elsevier BV
Published
2007-12
Volume
17
Issue
23
Pages
2054-2060
ISSN
0960-9822 (ISSN-L)
OpenAlex
W2159376228
Cited by
1,252
References
1
Citations by year
2026: 39 · 2025: 50 · 2024: 59 · 2023: 55 · 2022: 95 · 2021: 89 · 2020: 95 · 2019: 87 · 2018: 95 · 2017: 76 · 2016: 76 · 2015: 110 · 2014: 85 · 2013: 65 · 2012: 58
FWCI
11.73
Type
journal article
Language
en
Open access
Locations
  • Current Biology (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health
  • National Cancer Institute (CA84198)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Hippo pathway signaling and YAP/TAZ
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Developmental Biology and Gene Regulation
  • Health Sciences › Medicine › Hepatology › Liver physiology and pathology
Keywords
YAP, Hippo signaling pathway, organ size control, tissue overgrowth, Notch signaling, gamma-secretase inhibitors, intestinal dysplasia, colorectal cancer, liver size, Yorkie
MeSH terms
YAP-Signaling Proteins, Adenoma, Animals, Cell Differentiation, Humans, Intestine, Small, Liver, Mice, Transgenic, Organ Size, Phosphoproteins, Stem Cells, Transcription Factors, Colorectal Neoplasms, Signal Transduction, Oligonucleotide Array Sequence Analysis, Adaptor Proteins, Signal Transducing, Cell Proliferation, Mice

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