Stem cells in prostate and prostate cancer development

Urologic Oncology
John S Lam, Robert E Reiter

Abstract

Most cancers comprise a heterogenous population of cells with marked differences in their potential to proliferate as well as the ability to reconstitute the tumor upon transplantation. Cancer stem cells are a minor population of tumor cells that possess the stem cell property of self-renewal. Dysregulation of stem cell self-renewal is a likely requirement for the development of cancer. Cell signaling pathways shared by stem cells and cancer cells lend further evidence for a possible link between these 2 populations of cells. Study of the differentiation pathways of normal and abnormal prostate growth has led to the development of a stem cell model for prostate cancer. The basal layer of the normal prostate is believed to be populated by prostate epithelial stem cells and a population of transit-amplifying cells intermediate in differentiation to the stem and fully differentiated cells. There is recent evidence suggesting that prostate cancer occurs from malignant transformation of stem/progenitor cells, thereby resisting apoptosis and spawning proliferation. This new model for prostate cancer will have significant ramifications for the way this disease is studied and treated. Furthermore, through targeting the prostate cancer ...Continue Reading

Citations

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