| Reviewing of cancer stem cell hypothesis |
| Min Hee Hur |
| Department of Surgery, Cheil General Hospital and Women’s Healthcare Center, College of Medicine, Kwandong University, Seoul, Korea |
| 암줄기세포 이론을 돌아보며 |
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허민희 |
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제일병원 외과, 관동대학교 의과대학 |
| Corresponding Author:
Min Hee Hur ,Tel: +82-2-2000-7277, Fax: +82-2-2000-7791, Email: hmh1916@gmail.com |
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Received: November 11, 2009; Accepted: December 9, 2009. |
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| ABSTRACT |
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Cancer Stem Cells
Recent results have supported the cancer stem cells hypothesis in which tumors originate from tissue stem cells or their
early progenitors and, as a result, produce tumors that retain stem cell properties. These properties drive tumorigenesis
and differentiation that contributes to cellular heterogeneity. In breast cancers, a cell population of surface marker
CD44+CD24-or low is highly tumorigenic. Aldehyde dehydronase(ALDH) positive cells are also powerfully tumorigenic and this
marker can be poor prognostic factor in breast cancer patients. The number of cancer stem cells is very small, and is
tightly controlled by the self-renewal pathway and the signals of their environment (niche). Epithelial-mesenchymal
transition(EMT) is a key development program that is often activated during cancer invasion and metastasis. Although our
understanding of the biology of these cancer stem cells remains rudimentary, the existence of these cells has implications
for current conceptualization of malignant transformation and the treatment of cancer. |
| Keywords:
cancer stem cells | CD44+CD24-or low | ALDH | EMT |
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