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  • Title: The Notch pathway promotes the cancer stem cell characteristics of CD90+ cells in hepatocellular carcinoma.
    Author: Luo J, Wang P, Wang R, Wang J, Liu M, Xiong S, Li Y, Cheng B.
    Journal: Oncotarget; 2016 Feb 23; 7(8):9525-37. PubMed ID: 26848615.
    Abstract:
    CD90 has been identified as a marker for liver cancer stem cells (CSCs) that are responsible for tumorigenic activity, but it is not known how CD90+ cells contribute to tumor initiation and progression. Our data demonstrated that high expression of CD90 in Hepatocellular Carcinoma (HCC) tissues correlated with venous filtration in HCC patients. CD90+ cells isolated from HCC cell lines exhibited increased tumorigenicity, chemoresistance, tumor invasion and metastasis. Notch pathway was activated in CD90+ cells and we found that inhibition of Notch pathway in CD90+ CSCs decreased tumorigenicity, cell invasion, migration and expression of stem cell related genes. Activation of Notch pathway in CD90- cells induced self-renewal, invasion and migration. Furthermore, we observed that cancer stem cell features were facilitated by stimulating G1-S transition in the cell cycle phase and inhibiting apoptosis mediated by Notch pathway. Our findings suggested CD90 could be used as a potential biomarker for HCC CSCs, and that cancer stem cell activity was elevated through up activated Notch pathway in CD90+ CSCs.
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