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Desi N, Tong QY, Teh V, Chan JJ, Zhang B, Tabatabaeian H, Tan HQ, Kapeli K, Jin W, Lim CY, Kwok ZH, Tan HT, Wang S, Siew BE, Lee KC, Chong CS, Tan KK, Yang H, Kappei D, Yeo GW, Chung MCM, Tay Y. Global analysis of RNA-binding proteins identifies a positive feedback loop between LARP1 and MYC that promotes tumorigenesis. Cell Mol Life Sci 2022; 79:147. [PMID: 35195778 PMCID: PMC11072786 DOI: 10.1007/s00018-021-04093-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Revised: 12/08/2021] [Accepted: 12/15/2021] [Indexed: 11/03/2022]
Abstract
In addition to genomic alterations, aberrant changes in post-transcriptional regulation can modify gene function and drive cancer development. RNA-binding proteins (RBPs) are a large class of post-transcriptional regulators that have been increasingly implicated in carcinogenesis. By integrating multi-omics data, we identify LARP1 as one of the most upregulated RBPs in colorectal cancer (CRC) and demonstrate its oncogenic properties. We perform LARP1:RNA interactome profiling and unveil a previously unexplored role for LARP1 in targeting the 3'UTR of oncogenes in CRC. Notably, we identify the proto-oncogenic transcription factor MYC as a key LARP1-regulated target. Our data show that LARP1 positively modulates MYC expression by associating with its 3'UTR. In addition, antisense oligonucleotide-mediated blocking of the interaction between LARP1 and the MYC 3'UTR reduces MYC expression and in vitro CRC growth. Furthermore, a systematic analysis of LARP1:protein interactions reveals IGF2BP3 and YBX1 as LARP1-interacting proteins that also regulate MYC expression and CRC development. Finally, we demonstrate that MYC reciprocally modulates LARP1 expression by targeting its enhancer. In summary, our data reveal a critical, previously uncharacterized role of LARP1 in promoting CRC tumorigenesis, validate its direct regulation of the proto-oncogene MYC and delineate a model of the positive feedback loop between MYC and LARP1 that promotes CRC growth and development.
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Affiliation(s)
- Ng Desi
- Cancer Science Institute of Singapore, National University of Singapore, Singapore, 117599, Singapore
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, 117596, Singapore
| | - Qing Yun Tong
- Cancer Science Institute of Singapore, National University of Singapore, Singapore, 117599, Singapore
| | - Velda Teh
- Cancer Science Institute of Singapore, National University of Singapore, Singapore, 117599, Singapore
| | - Jia Jia Chan
- Cancer Science Institute of Singapore, National University of Singapore, Singapore, 117599, Singapore
| | - Bin Zhang
- Cancer Science Institute of Singapore, National University of Singapore, Singapore, 117599, Singapore
| | - Hossein Tabatabaeian
- Cancer Science Institute of Singapore, National University of Singapore, Singapore, 117599, Singapore
| | - Hui Qing Tan
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, 117597, Singapore
| | - Katannya Kapeli
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, 117597, Singapore
| | - Wenhao Jin
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, 117597, Singapore
| | - Chun You Lim
- Cancer Science Institute of Singapore, National University of Singapore, Singapore, 117599, Singapore
| | - Zhi Hao Kwok
- Cancer Science Institute of Singapore, National University of Singapore, Singapore, 117599, Singapore
- Division of Pulmonary and Critical Care, Boston University, Boston, MA, 02118, USA
| | - Hwee Tong Tan
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, 117596, Singapore
| | - Shi Wang
- Department of Pathology, National University Health System, Singapore, Singapore
| | - Bei-En Siew
- Department of Surgery, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Kuok-Chung Lee
- Division of Colorectal Surgery, University Surgical Cluster, National University Health System, Singapore, Singapore
| | - Choon-Seng Chong
- Department of Surgery, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- Division of Colorectal Surgery, University Surgical Cluster, National University Health System, Singapore, Singapore
| | - Ker-Kan Tan
- Department of Surgery, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- Division of Colorectal Surgery, University Surgical Cluster, National University Health System, Singapore, Singapore
| | - Henry Yang
- Cancer Science Institute of Singapore, National University of Singapore, Singapore, 117599, Singapore
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, 117596, Singapore
| | - Dennis Kappei
- Cancer Science Institute of Singapore, National University of Singapore, Singapore, 117599, Singapore
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, 117596, Singapore
| | - Gene W Yeo
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, 117597, Singapore
- Department of Cellular and Molecular Medicine, Stem Cell Program and Institute for Genomic Medicine, University of California, La Jolla, San Diego, USA
| | - Maxey Ching Ming Chung
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, 117596, Singapore
| | - Yvonne Tay
- Cancer Science Institute of Singapore, National University of Singapore, Singapore, 117599, Singapore.
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, 117596, Singapore.
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Desi N, Teh V, Tong QY, Lim CY, Tabatabaeian H, Chew XH, Sanchez-Mejias A, Chan JJ, Zhang B, Pitcheshwar P, Siew BE, Wang S, Lee KC, Chong CS, Cheong WK, Lieske B, Tan IJW, Tan KK, Tay Y. MiR-138 is a potent regulator of the heterogenous MYC transcript population in cancers. Oncogene 2022; 41:1178-1189. [PMID: 34937878 PMCID: PMC8856960 DOI: 10.1038/s41388-021-02084-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2021] [Revised: 10/06/2021] [Accepted: 10/14/2021] [Indexed: 12/03/2022]
Abstract
3'UTR shortening in cancer has been shown to activate oncogenes, partly through the loss of microRNA-mediated repression. This suggests that many reported microRNA-oncogene target interactions may not be present in cancer cells. One of the most well-studied oncogenes is the transcription factor MYC, which is overexpressed in more than half of all cancers. MYC overexpression is not always accompanied by underlying genetic aberrations. In this study, we demonstrate that the MYC 3'UTR is shortened in colorectal cancer (CRC). Using unbiased computational and experimental approaches, we identify and validate microRNAs that target the MYC coding region. In particular, we show that miR-138 inhibits MYC expression and suppresses tumor growth of CRC and hepatocellular carcinoma (HCC) cell lines. Critically, the intravenous administration of miR-138 significantly impedes MYC-driven tumor growth in vivo. Taken together, our results highlight the previously uncharacterized shortening of the MYC 3'UTR in cancer, and identify miR-138 as a potent regulator of the heterogenous MYC transcript population.
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Affiliation(s)
- Ng Desi
- grid.4280.e0000 0001 2180 6431Cancer Science Institute of Singapore, National University of Singapore, Singapore, 117599 Singapore ,grid.4280.e0000 0001 2180 6431Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, 117597 Singapore
| | - Velda Teh
- grid.4280.e0000 0001 2180 6431Cancer Science Institute of Singapore, National University of Singapore, Singapore, 117599 Singapore
| | - Qing Yun Tong
- grid.4280.e0000 0001 2180 6431Cancer Science Institute of Singapore, National University of Singapore, Singapore, 117599 Singapore
| | - Chun You Lim
- grid.4280.e0000 0001 2180 6431Cancer Science Institute of Singapore, National University of Singapore, Singapore, 117599 Singapore
| | - Hossein Tabatabaeian
- grid.4280.e0000 0001 2180 6431Cancer Science Institute of Singapore, National University of Singapore, Singapore, 117599 Singapore
| | - Xiao Hong Chew
- grid.4280.e0000 0001 2180 6431Cancer Science Institute of Singapore, National University of Singapore, Singapore, 117599 Singapore
| | - Avencia Sanchez-Mejias
- grid.4280.e0000 0001 2180 6431Cancer Science Institute of Singapore, National University of Singapore, Singapore, 117599 Singapore ,grid.5612.00000 0001 2172 2676Present Address: Department of Experimental and Health Sciences, Pompeu Fabra University, 08003 Barcelona, Spain
| | - Jia Jia Chan
- grid.4280.e0000 0001 2180 6431Cancer Science Institute of Singapore, National University of Singapore, Singapore, 117599 Singapore
| | - Bin Zhang
- grid.4280.e0000 0001 2180 6431Cancer Science Institute of Singapore, National University of Singapore, Singapore, 117599 Singapore
| | - Priyankaa Pitcheshwar
- grid.4280.e0000 0001 2180 6431Cancer Science Institute of Singapore, National University of Singapore, Singapore, 117599 Singapore
| | - Bei-En Siew
- grid.4280.e0000 0001 2180 6431Department of Surgery, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Shi Wang
- grid.410759.e0000 0004 0451 6143Department of Pathology, National University Health System, Singapore, Singapore
| | - Kuok-Chung Lee
- grid.410759.e0000 0004 0451 6143Division of Colorectal Surgery, University Surgical Cluster, National University Health System, Singapore, Singapore
| | - Choon-Seng Chong
- grid.4280.e0000 0001 2180 6431Department of Surgery, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore ,grid.410759.e0000 0004 0451 6143Division of Colorectal Surgery, University Surgical Cluster, National University Health System, Singapore, Singapore
| | - Wai-Kit Cheong
- grid.410759.e0000 0004 0451 6143Division of Colorectal Surgery, University Surgical Cluster, National University Health System, Singapore, Singapore
| | - Bettina Lieske
- grid.4280.e0000 0001 2180 6431Department of Surgery, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore ,grid.410759.e0000 0004 0451 6143Division of Colorectal Surgery, University Surgical Cluster, National University Health System, Singapore, Singapore
| | - Ian Jse-Wei Tan
- grid.410759.e0000 0004 0451 6143Division of Colorectal Surgery, University Surgical Cluster, National University Health System, Singapore, Singapore
| | - Ker-Kan Tan
- grid.4280.e0000 0001 2180 6431Department of Surgery, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore ,grid.410759.e0000 0004 0451 6143Division of Colorectal Surgery, University Surgical Cluster, National University Health System, Singapore, Singapore
| | - Yvonne Tay
- Cancer Science Institute of Singapore, National University of Singapore, Singapore, 117599, Singapore. .,Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, 117597, Singapore.
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Abstract
Salient or interest points ot a medical image can represent local properties of it. In this paper, a salient points based approach for medical image retrieval is proposed. In order to extract salient points from a medical image, we proposed a novel approach based on spectrum energy variation. Moreover, the other two salient points algorithm are also used. One is entropy-based and the other is a saliency-based bottom-up visual attention computational model which is motivated by visual physiological experimental results. Preliminary comparison study of salient points-based and entire image-based retrieval approach showed that our approach can achieve retrieval accuracy closely to global approach. Furthermore, amount of computation can be reduced by our approach.
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Affiliation(s)
- W Liu
- College of Boimedical Engineering & Instrument Science., Zhejiang University, Hangzhou, China
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Msall M, Dietsche W, Friedland KJ, Tong QY. Images of the phonon propagation across twist-bonded crystals. Phys Rev Lett 2000; 85:598-601. [PMID: 10991349 DOI: 10.1103/physrevlett.85.598] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/1999] [Indexed: 05/23/2023]
Abstract
We investigate identical but twist-bonded crystals using phonon imaging techniques. As in homogeneous crystals, very anisotropic flux patterns are observed. However, the shape of the pattern depends dramatically on the respective twist angle. The observed phonon images in wafer bonded GaAs/GaAs and Si/Si samples are essentially consistent with the predictions of the acoustic mismatch model for defect-free interfaces, with the exception of GaAs wafers twist bonded at a 45 degrees angle where modes with large shear stress are missing, which indicates strong dislocation scattering.
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Affiliation(s)
- M Msall
- Department of Physics, Bowdoin College, Brunswick, Maine 04011, USA
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