Abstract:
:Colon cancer stem cells (CCSCs) are involved in colon cancer and promote tumor progression and recurrence. LGR5, a marker for intestinal stem cells (ISCs), is also considered to serve as a marker for CCSCs. However, the precise function of LGR5 in CCSCs is unclear. In this study, we demonstrated that LGR5 was highly expressed in CCSCs-enriched HT29 spheroid cells. Downregulation of LGR5 with small interfering RNA (siRNA) decreased the expression of stem the cell markers CD133 and CD44 in HT29 spheroid cells. In addition, silencing of LGR5 inhibited cell proliferation, secondary tumor sphere formation and induced cell apoptosis, and G0/G1 phase arrest in vitro by modulating Bcl-2, Bcl-xL and Bax. Knockdown of LGR5 enhanced chemosensitivity and reduced the invasive ability of HT29 spheroid cells. Moreover, LGR5-siRNA suppressed tumorigenicity of HT29 spheroid cells in vivo. The findings suggested that LGR5 plays a vital role in the maintenance of CCSCs and is a potential therapeutic target for colon cancer.
journal_name
Int J Mol Medjournal_title
International journal of molecular medicineauthors
Chen X,Wei B,Han X,Zheng Z,Huang J,Liu J,Huang Y,Wei Hdoi
10.3892/ijmm.2014.1752subject
Has Abstractpub_date
2014-07-01 00:00:00pages
35-42issue
1eissn
1107-3756issn
1791-244Xjournal_volume
34pub_type
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