Cited by 377RNA Research and SplicingCancer-related molecular mechanisms researchCircular RNAs in diseases

The MBNL3 splicing factor promotes hepatocellular carcinoma by increasing PXN expression through the alternative splicing of lncRNA-PXN-AS1

Yuan, Ji-hang, Liu, Xiao-ning, Wang, Tian-tian, Pan, Wei, Tao, Qi-fei, Zhou, Wei-ping, Wang, Fang, Sun, Shu-han·2017·Nature Cell Biology

Abstract

Understanding the roles of splicing factors and splicing events during tumorigenesis would open new avenues for targeted therapies. Here we identify an oncofetal splicing factor, MBNL3, which promotes tumorigenesis and indicates poor prognosis of hepatocellular carcinoma patients. MBNL3 knockdown almost completely abolishes hepatocellular carcinoma tumorigenesis. Transcriptomic analysis revealed that MBNL3 induces lncRNA-PXN-AS1 exon 4 inclusion. The transcript lacking exon 4 binds to coding sequences of PXN mRNA, causes dissociation of translation elongation factors from PXN mRNA, and thereby inhibits PXN mRNA translation. In contrast, the transcript containing exon 4 preferentially binds to the 3' untranslated region of PXN mRNA, protects PXN mRNA from microRNA-24-AGO2 complex-induced degradation, and thereby increases PXN expression. Through inducing exon 4 inclusion, MBNL3 upregulates PXN, which mediates the pro-tumorigenic roles of MBNL3. Collectively, these data demonstrate detailed mechanistic links between an oncofetal splicing factor, a splicing event and tumorigenesis, and establish splicing factors and splicing events as potential therapeutic targets.

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Crossref · 10.1038/ncb3538

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Authors
Yuan, J.-H., Liu, X.-N., Wang, T.-T., Pan, W., Tao, Q.-F., Zhou, W.-P., Wang, F., & Sun, S.-H.
Affiliations
Second Military Medical University (CN)
Corresponding author
Wang, Fang
Venue
Nature Cell Biology
Published
2017-05-29
Volume
19
Issue
7
Pages
820-832
ISSN
  • 1465-7392 (ISSN-L)
  • 1476-4679
OpenAlex
W2618859545
Cited by
367
References
59
Citations by year
2026: 13 · 2025: 22 · 2024: 45 · 2023: 50 · 2022: 54 · 2021: 55 · 2020: 39 · 2019: 49 · 2018: 34 · 2017: 6
FWCI
14.30
Type
journal article
Language
en
Open access
closed
Locations
  • Nature Cell Biology (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Natural Science Foundation of Shanghai
  • National Natural Science Foundation of China
  • Ministry of Science and Technology of the People's Republic of China
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA Research and Splicing
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Cancer-related molecular mechanisms research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Circular RNAs in diseases
Keywords
hepatocellular carcinoma, alternative splicing, mRNA translation repression, mRNA degradation, 3' untranslated region, carcinogenesis, prognosis, therapeutic target
MeSH terms
Nanog Homeobox Protein, Animals, Binding Sites, Carrier Proteins, Exons, Carcinoma, Hepatocellular, Humans, Liver Neoplasms, Male, Mice, Inbred C57BL, Mice, Nude, Protein Binding, Time Factors, Transfection, Up-Regulation, Gene Expression Regulation, Neoplastic, RNA-Binding Proteins, Alternative Splicing, 3' Untranslated Regions, Gene Expression Profiling, RNA Interference, MicroRNAs, Tumor Burden, Cell Proliferation, Octamer Transcription Factor-3, Mice, Paxillin, SOXB1 Transcription Factors, Hep G2 Cells, High-Throughput Nucleotide Sequencing, Argonaute Proteins, RNA, Long Noncoding

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