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Jie M, Wu Y, Gao M, Li X, Liu C, Ouyang Q, Tang Q, Shan C, Lv Y, Zhang K, Dai Q, Chen Y, Zeng S, Li C, Wang L, He F, Hu C, Yang S. CircMRPS35 suppresses gastric cancer progression via recruiting KAT7 to govern histone modification. Mol Cancer 2020; 19:56. [PMID: 32164722 PMCID: PMC7066857 DOI: 10.1186/s12943-020-01160-2] [Citation(s) in RCA: 122] [Impact Index Per Article: 24.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Accepted: 02/13/2020] [Indexed: 12/29/2022] Open
Abstract
Background Aberrant expression of circular RNAs contributes to the initiation and progression of cancers, but the underlying mechanism remains elusive. Methods RNA-seq and qRT-PCR were performed to screen differential expressed circRNAs between gastric cancer tissues and adjacent normal tissues. Candidate circRNA (circMRPS35) was screened out and validated by qRT-PCR. Cell proliferation and invasion ability were determined by CCK-8 and cell invasion assays. RNA-seq, GO-pathway, RNA pull-down and ChIRP were further applied to search for detailed mechanism. Results Here, a novel circRNA named circMRPS35, was screened out by RNA-seq in gastric cancer tissues, whose expression is related to clinicopathological characteristics and prognosis in gastric cancer patients. Biologically, circMRPS35 suppresses the proliferation and invasion of gastric cancer cells in vitro and in vivo. Mechanistically, circMRPS35 acts as a modular scaffold to recruit histone acetyltransferase KAT7 to the promoters of FOXO1 and FOXO3a genes, which elicits acetylation of H4K5 in their promoters. Particularly, circMRPS35 specifically binds to FOXO1/3a promoter regions directly. Thus, it dramatically activates the transcription of FOXO1/3a and triggers subsequent response of their downstream target genes expression, including p21, p27, Twist1 and E-cadherin, resulting in the inhibition of cell proliferation and invasion. Moreover, circMRPS35 expression positively correlates with that of FOXO1/3a in gastric cancer tissues. Conclusions Our findings not only reveal the pivotal roles of circMRPS35 in governing histone modification in anticancer treatment, but also advocate for triggering circMRPS35/KAT7/FOXO1/3a pathway to combat gastric cancer.
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Affiliation(s)
- Mengmeng Jie
- Department of Gastroenterology, Xinqiao Hospital, Third Military Medical University, Chongqing, 400037, China
| | - Yaran Wu
- Department of Gastroenterology, Xinqiao Hospital, Third Military Medical University, Chongqing, 400037, China
| | - Mengyuan Gao
- Department of Gastroenterology, Xinqiao Hospital, Third Military Medical University, Chongqing, 400037, China
| | - Xinzhe Li
- Department of Gastroenterology, Xinqiao Hospital, Third Military Medical University, Chongqing, 400037, China
| | - Cheng Liu
- Department of Gastroenterology, Xinqiao Hospital, Third Military Medical University, Chongqing, 400037, China
| | - Qin Ouyang
- Department of Medicinal Chemistry, College of Pharmacy, Third Military Medical University, Chongqing, 400038, China
| | - Qingyun Tang
- Department of Gastroenterology, Xinqiao Hospital, Third Military Medical University, Chongqing, 400037, China
| | - Changyu Shan
- Department of Medicinal Chemistry, College of Pharmacy, Third Military Medical University, Chongqing, 400038, China
| | - Yangfan Lv
- Department of Pathology, Xinqiao Hospital, Third Military Medical University, Chongqing, 400037, China
| | - Kebin Zhang
- Central Laboratory, Xinqiao Hospital, Third Military Medical University, Chongqing, 400037, China
| | - Qian Dai
- Central Laboratory, Xinqiao Hospital, Third Military Medical University, Chongqing, 400037, China
| | - Yang Chen
- Department of Gastroenterology, Xinqiao Hospital, Third Military Medical University, Chongqing, 400037, China
| | - Shuo Zeng
- Department of Gastroenterology, Xinqiao Hospital, Third Military Medical University, Chongqing, 400037, China
| | - Chenglin Li
- Department of Gastroenterology, Xinqiao Hospital, Third Military Medical University, Chongqing, 400037, China
| | - Liting Wang
- Biomedical Analysis Center, Third Military Medical University, Chongqing, 400038, China
| | - Fengtian He
- Department of Biochemistry and Molecular Biology, College of Basic Medical Sciences, Third Military Medical University, Chongqing, 400038, China
| | - Changjiang Hu
- Department of Gastroenterology, Xinqiao Hospital, Third Military Medical University, Chongqing, 400037, China.
| | - Shiming Yang
- Department of Gastroenterology, Xinqiao Hospital, Third Military Medical University, Chongqing, 400037, China.
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