Characterization of Y-box binding protein 1 in Hepatocellular Carcinoma Stem Cells
Date Issued
2014
Date
2014
Author(s)
Huang, Hong-Xuan
Abstract
Hepatocellular Carcinoma (HCC) is the third cause of cancer mortality in the world. The important issues for the treatment of HCC are the high recurrence rate, easy metastasis and drug resistance. Recently, the concept of cancer stem cells (CSCs) provides a new consideration in the cancer therapy including HCC. Cancer stem cells are a subpopulation of cells in the tumor, which have the capability of self-renewal and differentiation and drug resistance in chemotherapy. Previous studies showed that many properties of CSCs, such as high cell mobility, evading immune destruction and reprogramming of energy metabolism, are very different from the original understanding of cancer. As a result, development of the therapy targeting CSCs is one of the novel therapeutic strategies for the cancer in the future. YB-1 is a protein with multiple functions, which has been found associated with many kinds of cancers. YB-1 can increase the expression of stemness marker genes, enhance cell mobility and up-regulate MDR gene expression. Besides, YB-1 is known as a significant regulator during liver development and regeneration.
To investigate the regulatory function of YB-1 in CSCs of HCC, I used sphere forming method to enrich CSCs. In the sphere cells, the expression of YB-1 and some pluripotent genes was up-regulated. In addition, the sphere forming ability of YB-1-shRNA knockdown HuH7 HCC cell line was decreased. YB-1 would translocalize to the nucleus of sphere forming cells or side-population cells, and the cancer stem cell population sorted from HCC cell line. These results indicated YB-1 might be involved in the transcriptional regulation in the cancer stem cell-like cells in HCC. Additionally, knock down of YB-1 also down-regulated the stemness, drug resistance and epithelial-mesenchymal transition (EMT) genes expression by qPCR analysis. The detail mechanism would be regulated by Wnt/β-catenin pathway and epigenetic regulation. From these results, YB-1 may play a key role in HCC cancer stem cells.
Subjects
肝癌
癌幹細胞
YB-1
SDGs
Type
thesis
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