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Wang C, Jiang X, Li X, Song S, Meng Q, Wang L, Lu Y, Xin X, Pu H, Gui X, Li T, Lu D. Long noncoding RNA HULC accelerates the growth of human liver cancer stem cells by upregulating CyclinD1 through miR675-PKM2 pathway via autophagy. Stem Cell Res Ther 2020; 11:8. [PMID: 31900225 PMCID: PMC6942366 DOI: 10.1186/s13287-019-1528-y] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Revised: 10/30/2019] [Accepted: 12/10/2019] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND The functions of HULC have been demonstrated in several cancers. However, its mechanism has not been elucidated in human liver cancer stem cells. METHODS Liver cancer stem cells were isolated from Huh7 cells; gene infection and tumorigenesis test in vitro and in vivo were performed. RESULTS We demonstrate that HULC promotes growth of liver cancer stem cells in vitro and in vivo. Mechanistically, HULC enhances the expression of Sirt1 dependent on miR675 and then induces the cellular autophagy through Sirt1. HULC enhances CyclinD1 and thereby increases pRB and inhibited P21 WAF1/CIP 1 via autophagy-miR675-PKM2 pathway in human liver cancer stem cells. Ultimately, our results demonstrate that CyclinD1 is required for the oncogenic functions of HULC in liver cancer stem cells. CONCLUSIONS It reveals the key molecular signaling pathways for HULC and provides important basic information for finding effective tumor therapeutic targets based on HULC.
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Affiliation(s)
- Chen Wang
- Shanghai Putuo District People's Hospital, School of Life Science and Technology, Tongji University, Shanghai, 200092, China
| | - Xiaoxue Jiang
- Shanghai Putuo District People's Hospital, School of Life Science and Technology, Tongji University, Shanghai, 200092, China
| | - Xiaonan Li
- Shanghai Putuo District People's Hospital, School of Life Science and Technology, Tongji University, Shanghai, 200092, China
| | - Shuting Song
- Shanghai Putuo District People's Hospital, School of Life Science and Technology, Tongji University, Shanghai, 200092, China
| | - Qiuyu Meng
- Shanghai Putuo District People's Hospital, School of Life Science and Technology, Tongji University, Shanghai, 200092, China
| | - Liyan Wang
- Shanghai Putuo District People's Hospital, School of Life Science and Technology, Tongji University, Shanghai, 200092, China
| | - Yanan Lu
- Shanghai Putuo District People's Hospital, School of Life Science and Technology, Tongji University, Shanghai, 200092, China
| | - Xiaoru Xin
- Shanghai Putuo District People's Hospital, School of Life Science and Technology, Tongji University, Shanghai, 200092, China
| | - Hu Pu
- Shanghai Putuo District People's Hospital, School of Life Science and Technology, Tongji University, Shanghai, 200092, China
| | - Xin Gui
- Shanghai Putuo District People's Hospital, School of Life Science and Technology, Tongji University, Shanghai, 200092, China
| | - Tianming Li
- Shanghai Putuo District People's Hospital, School of Life Science and Technology, Tongji University, Shanghai, 200092, China
| | - Dongdong Lu
- Shanghai Putuo District People's Hospital, School of Life Science and Technology, Tongji University, Shanghai, 200092, China.
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