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White AC, Khuu JK, Dang CY, Hu J, Tran KV, Liu A, Gomez S, Zhang Z, Yi R, Scumpia P, Grigorian M, Lowry WE. Stem cell quiescence acts as a tumour suppressor in squamous tumours. Nat Cell Biol 2013; 16:99-107. [PMID: 24335650 PMCID: PMC3874399 DOI: 10.1038/ncb2889] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2013] [Accepted: 10/31/2013] [Indexed: 12/23/2022]
Abstract
In some organs, adult stem cells are uniquely poised to serve as cancer cells of origin. It is unclear, however, whether tumorigenesis is influenced by the activation state of the adult stem cell. Hair follicle stem cells (HFSCs) act as cancer cells of origin for cutaneous squamous cell carcinoma (SCC) and undergo defined cycles of quiescence and activation. The data presented here show that HFSCs are unable to initiate tumors during the quiescent phase of the hair cycle, indicating that the mechanisms that keep HFSCs dormant are dominant to the gain of oncogenes (Ras) or the loss of tumor suppressors (p53). Furthermore, Pten activity is necessary for quiescence based tumor suppression, as its deletion alleviates tumor suppression without affecting proliferation. These data demonstrate that stem cell quiescence is a form of tumor suppression in HFSCs, and that Pten plays a role in maintaining quiescence in the presence of tumorigenic stimuli.
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Affiliation(s)
- A C White
- 1] Department of Molecular Cell and Developmental Biology, UCLA, California 90095, USA [2] Eli and Edythe Broad Center for Regenerative Medicine, UCLA, California 90095, USA
| | - J K Khuu
- 1] Department of Molecular Cell and Developmental Biology, UCLA, California 90095, USA [2] Eli and Edythe Broad Center for Regenerative Medicine, UCLA, California 90095, USA
| | - C Y Dang
- 1] Department of Molecular Cell and Developmental Biology, UCLA, California 90095, USA [2] Eli and Edythe Broad Center for Regenerative Medicine, UCLA, California 90095, USA
| | - J Hu
- 1] Department of Molecular Cell and Developmental Biology, UCLA, California 90095, USA [2] Eli and Edythe Broad Center for Regenerative Medicine, UCLA, California 90095, USA
| | - K V Tran
- 1] Department of Molecular Cell and Developmental Biology, UCLA, California 90095, USA [2] Eli and Edythe Broad Center for Regenerative Medicine, UCLA, California 90095, USA
| | - A Liu
- 1] Department of Molecular Cell and Developmental Biology, UCLA, California 90095, USA [2] Eli and Edythe Broad Center for Regenerative Medicine, UCLA, California 90095, USA
| | - S Gomez
- 1] Department of Molecular Cell and Developmental Biology, UCLA, California 90095, USA [2] Eli and Edythe Broad Center for Regenerative Medicine, UCLA, California 90095, USA
| | - Z Zhang
- Department of Molecular, Cellular, and Developmental Biology, University of Colorado, Boulder, Colorado 80309, USA
| | - R Yi
- Department of Molecular, Cellular, and Developmental Biology, University of Colorado, Boulder, Colorado 80309, USA
| | - P Scumpia
- Department of Medicine, Division of Dermatology, David Geffen School of Medicine, UCLA, California 90095, USA
| | - M Grigorian
- 1] Department of Molecular Cell and Developmental Biology, UCLA, California 90095, USA [2] Eli and Edythe Broad Center for Regenerative Medicine, UCLA, California 90095, USA
| | - W E Lowry
- 1] Department of Molecular Cell and Developmental Biology, UCLA, California 90095, USA [2] Eli and Edythe Broad Center for Regenerative Medicine, UCLA, California 90095, USA [3] Jonsson Cancer Research Center, UCLA, California 90095, USA [4] Molecular Biology Institute, UCLA, California 90095, USA
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