Journal
BRITISH JOURNAL OF CANCER
Volume 103, Issue 3, Pages 382-390Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/sj.bjc.6605762
Keywords
colorectal cancer; cancer stem cell; CD44; CD166; CD133; EpCAM
Categories
Funding
- Swiss National Foundation [PMPD33-118653]
Ask authors/readers for more resources
BACKGROUND: The aim of this study was to elucidate the prognostic impact of putative cancer stem cell markers CD133, CD166, CD44s, EpCAM, and aldehyde dehydrogenase-1 (ALDH1) in colorectal cancer. METHODS: A tissue microarray of 1420 primary colorectal cancers and 57 normal mucosa samples was immunostained for CD133, CD166, CD44s, EpCAM, and ALDH1 in addition to 101 corresponding whole tissue sections. Invasive potential of three colorectal cancer cell lines was tested. RESULTS: Differences between normal tissue and cancer were observed for all markers (P<0.001). Loss of membranous CD166 and CD44s were linked to higher pT (P = 0.002, P = 0.014), pN (P = 0.004, P = 0.002), an infiltrating growth pattern (P<0.001, P = 0.002), and worse survival (P = 0.015, P = 0.019) in univariate analysis only. Loss of membranous EpCAM expression was also linked to higher pN (P = 0.023) and infiltrating growth pattern (P = 0.005). The CD44s, CD166, and EpCAM expression were lost towards the invasive front. The CD44-/CD166- cells from three colorectal cancer cell lines exhibited significantly higher invasive potential in vitro than their positive counterparts. CONCLUSIONS: Loss, rather than overexpression, of membranous CD44s, CD166, and EpCAM is linked to tumour progression. This supports the notion that the membranous evaluation of these proteins assessed by immunohistochemistry may be representative of their cell adhesion rather than their intra-cellular functions. British Journal of Cancer (2010) 103, 382-390. doi:10.1038/sj.bjc.6605762 www.bjcancer.com Published online 6 July 2010 (C) 2010 Cancer Research UK
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available