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Liu, T J; Sun, B C; Zhao, X L; Zhao, X M; Sun, T; Gu, Q; Yao, Z; Dong, X Y; Zhao, N; Liu, N
Oncogene, 01/2013, Letnik: 32, Številka: 5Journal Article
Vasculogenic mimicry (VM) refers to the unique capability of aggressive tumor cells to mimic the pattern of embryonic vasculogenic networks. In the study we demonstrated that CD133 expression was the highest in triple-negative (TN) breast cancer specimens. Importantly, VM showed statistical correlation with CD133(+) expression. The presence of the close relationship between VM and CD133(+) expression might be central for TN tumor relapse and progression. The TN breast cancer cell line, MDA-MB-231 cells developed a range of colony morphologies paralleling the holoclone, meroclone and paraclone morphologies produced by normal keratinocytes and other epithelial cancer cell lines when plated at clonal densities. Holoclone cells were capable of forming more colonies on soft agar than meroclone cells and paraclone cells, suggesting that holoclone cells had higher self-renew potential and might harbors cancer stem cells (CSCs) subpopulation. Strikingly, it was holoclone that displayed CD133(+) phenotype and formed VM. In addition, holoclone acquired endothelial cell marker vascular endothelial-cadherin expression and upregulated VM mediators matrix metalloproteinase (MMP)-2 and MMP-9 expression. The subpopulation with holoclone morphology, CD133(+) phenotype and CSCs characteristics might have the capacity of transdifferentiation and contributed to VM in TN breast cancer. The related molecular pathways may be used as novel therapeutic targets for the inhibition of angiogenesis and metastasis in TN breast carcinoma.
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