Abstract

The canonical Wnt cascade has emerged as a critical regulator of stem cells. In many tissues, activation of Wnt signalling has also been associated with cancer. This has raised the possibility that the tightly regulated self-renewal mediated by Wnt signalling in stem and progenitor cells is subverted in cancer cells to allow malignant proliferation. Insights gained from understanding how the Wnt pathway is integrally involved in both stem cell and cancer cell maintenance and growth in the intestinal, epidermal and haematopoietic systems may serve as a paradigm for understanding the dual nature of self-renewal signals.

1. Department of Pharmacology and Cancer Biology, Duke University Medical Center, Durham, North Carolina 27710, USA
2. Hubrecht Laboratory, Uppsalalaan 8, 3584 CT Utrecht, The Netherlands

Correspondence to: Tannishtha Reya¹Hans Clevers² Correspondence and requests for materials should be addressed to T.R. (Email: t.reya@duke.edu) or H.C. (Email: clevers@niob.knaw.nl).

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