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Zhao Y, Zhang L, Yang J, Li C, Li P. CPEB2 inhibits preeclampsia progression by regulating SSTR3 translation through polyadenylation. Biochim Biophys Acta Mol Basis Dis 2024; 1870:167191. [PMID: 38648900 DOI: 10.1016/j.bbadis.2024.167191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2023] [Revised: 04/08/2024] [Accepted: 04/15/2024] [Indexed: 04/25/2024]
Abstract
AIMS Trophoblast cell dysfunction is one of the important factors leading to preeclampsia (PE). Cytoplasmic polyadenylation element-binding 2 (CPEB2) has been found to be differentially expressed in PE patients, but whether it mediates PE process by regulating trophoblast cell function is unclear. METHODS The expression of CPEB2 and somatostatin receptor 3 (SSTR3) was detected by quantitative real-time PCR, Western blot (WB) and immunofluorescence staining. Cell functions were analyzed by CCK-8 assay, EdU assay, flow cytometry and transwell assay. Epithelial-mesenchymal transition (EMT)-related protein levels were detected by WB. The interaction of CPEB2 and SSTR3 was confirmed by RIP assay, dual-luciferase reporter assay and PCR poly(A) tail assay. Animal experiments were performed to explore the effect of CPEB2 on PE progression in vivo, and the placental tissues of rat were used for H&E staining, immunohistochemical staining and TUNEL staining. RESULTS CPEB2 was lowly expressed in PE patients. CPEB2 upregulation accelerated trophoblast cell proliferation, migration, invasion and EMT, while its knockdown had an opposite effect. CPEB2 bound to the CPE site in the 3'-UTR of SSTR3 mRNA to suppress SSTR3 translation through reducing poly(A) tails. Besides, SSTR3 overexpression suppressed trophoblast cell proliferation, migration, invasion and EMT, while its silencing accelerated trophoblast cell functions. However, these effects could be reversed by CPEB2 upregulation and knockdown, respectively. In vivo experiments, CPEB2 overexpression relieved histopathologic changes, inhibited apoptosis, promoted proliferation and enhanced EMT in the placenta of PE rat by decreasing SSTR3 expression. CONCLUSION CPEB2 inhibited PE progression, which promoted trophoblast cell functions by inhibiting SSTR3 translation through polyadenylation.
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Affiliation(s)
- Yanhua Zhao
- Department of Obstetrics, Xiangya Hospital of Central South University, Changsha City, Hunan Province 410008, PR China
| | - Liran Zhang
- Department of Obstetrics, Xiangya Hospital of Central South University, Changsha City, Hunan Province 410008, PR China
| | - Jingjing Yang
- Department of Obstetrics, Xiangya Hospital of Central South University, Changsha City, Hunan Province 410008, PR China
| | - Caiwen Li
- Department of Obstetrics, Xiangya Hospital of Central South University, Changsha City, Hunan Province 410008, PR China
| | - Ping Li
- Department of Obstetrics, Xiangya Hospital of Central South University, Changsha City, Hunan Province 410008, PR China; Hunan Engineering Research Center of Early Life Development and Disease Prevention, Changsha City, Hunan Province 410008, PR China.
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Lv Y, Sun S, Zhang J, Wang C, Chen C, Zhang Q, Zhao J, Qi Y, Zhang W, Wang Y, Li M. Loss of RBM45 inhibits breast cancer progression by reducing the SUMOylation of IRF7 to promote IFNB1 transcription. Cancer Lett 2024:216988. [PMID: 38797234 DOI: 10.1016/j.canlet.2024.216988] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Revised: 05/11/2024] [Accepted: 05/23/2024] [Indexed: 05/29/2024]
Abstract
Type I interferons exhibit anti-proliferative and anti-cancer activities, but their detailed regulatory mechanisms in cancer have not been fully elucidated yet. RNA binding proteins are master orchestrators of gene regulation, which are closely related to tumor progression. Here we show that the upregulated RNA binding protein RBM45 correlates with poor prognosis in breast cancer. Depletion of RBM45 suppresses breast cancer progression both in cultured cells and xenograft mouse models. Mechanistically, RBM45 ablation inhibits breast cancer progression through regulating type I interferon signaling, particularly by elevating IFN-β production. Importantly, RBM45 recruits TRIM28 to IRF7 and stimulates its SUMOylation, thereby repressing IFNB1 transcription. Loss of RBM45 reduced the SUMOylation of IRF7 by reducing the interaction between TRIM28 and IRF7 to promote IFNB1 transcription, leading to the inhibition of breast cancer progression. Taken together, our finding uncovers a vital role of RBM45 in modulating type I interferon signaling and cancer aggressive progression, implicating RBM45 as a potential therapeutic target in breast cancer.
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Affiliation(s)
- Yuesheng Lv
- Department of Oncology of the Second Affiliated Hospital of Dalian Medical University & Institute of Cancer Stem Cell, Dalian Medical University, Dalian, 116023, China
| | - Siwen Sun
- Department of Oncology & Sino-US Research Center for Cancer Translational Medicine, the Second Affiliated Hospital, Dalian Medical University, Dalian 116023, China
| | - Jinrui Zhang
- Institute of Cancer Stem Cell, Dalian Medical University, Dalian 116044, China
| | - Chong Wang
- Institute of Cancer Stem Cell, Dalian Medical University, Dalian 116044, China
| | - Chaoqun Chen
- Institute of Cancer Stem Cell, Dalian Medical University, Dalian 116044, China
| | - Qianyi Zhang
- Institute of Cancer Stem Cell, Dalian Medical University, Dalian 116044, China
| | - Jinyao Zhao
- Institute of Cancer Stem Cell, Dalian Medical University, Dalian 116044, China
| | - Yangfan Qi
- Institute of Cancer Stem Cell, Dalian Medical University, Dalian 116044, China
| | - Wenjing Zhang
- Institute of Cancer Stem Cell, Dalian Medical University, Dalian 116044, China.
| | - Yang Wang
- Sino-US Research Center for Cancer Translational Medicine of the Second Affiliated Hospital of Dalian Medical University & Institute of Cancer Stem Cell, Dalian Medical University, Dalian 116023, China.
| | - Man Li
- Department of Oncology & Sino-US Research Center for Cancer Translational Medicine, the Second Affiliated Hospital, Dalian Medical University, Dalian 116023, China.
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3
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Zhao G, Zhao Z, Xia M, Xiao L, Zhu B, Wang H, Li X, Di J. CPEB2 inhibit cell proliferation through upregulating p21 mRNA stability in glioma. Sci Rep 2023; 13:23103. [PMID: 38158431 PMCID: PMC10756880 DOI: 10.1038/s41598-023-50848-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2023] [Accepted: 12/27/2023] [Indexed: 01/03/2024] Open
Abstract
Glioma is the most common primary malignant brain tumor in adults and remains an incurable disease at present. Thus, there is an urgent need for progress in finding novel molecular mechanisms that control the progression of glioma which could be used as therapeutic targets for glioma patients. The RNA binding protein cytoplasmic polyadenylate element-binding protein 2 (CPEB2) is involved in the pathogenesis of several tumors. However, the role of CPEB2 in glioma progression is unknown. In this study, the functional characterization of the role and molecular mechanism of CPEB2 in glioma were examined using a series of biological and cellular approaches in vitro and in vivo. Our work shows CPEB2 is significantly downregulated in various glioma patient cohorts. Functional characterization of CPEB2 by overexpression and knockdown revealed that it inhibits glioma cell proliferation and promotes apoptosis. CPEB2 exerts an anti-tumor effect by increasing p21 mRNA stability and inducing G1 cell cycle arrest in glioma. Overall, this work stands as the first report of CPEB2 downregulation and involvement in glioma pathogenesis, and identifies CPEB2 as an important tumor suppressor gene through targeting p21 in glioma, which revealed that CPEB2 may become a promising predictive biomarker for prognosis in glioma patients.
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Affiliation(s)
- Guang Zhao
- Cancer Institute, Xuzhou Medical University, 209 Tongshan Road, Xuzhou, 221004, Jiangsu, China
- Center of Clinical Oncology, The Affiliated Hospital of Xuzhou Medical University, 99 West Huaihai Road, Xuzhou, 221002, Jiangsu, China
- Jiangsu Center for the Collaboration and Innovation of Cancer Biotherapy, Xuzhou Medical University, 209 Tongshan Road, Xuzhou, 221004, Jiangsu, China
- Department of Neurosurgery, The Affiliated Hospital of Xuzhou Medical University, 99 West Huaihai Road, Xuzhou, 221000, Jiangsu, China
- Department of Emergency Medicine, The First People's Hospital of Kunshan, Kunshan, 215300, Jiangsu, China
| | - Zhongjun Zhao
- Cancer Institute, Xuzhou Medical University, 209 Tongshan Road, Xuzhou, 221004, Jiangsu, China
- Center of Clinical Oncology, The Affiliated Hospital of Xuzhou Medical University, 99 West Huaihai Road, Xuzhou, 221002, Jiangsu, China
- Jiangsu Center for the Collaboration and Innovation of Cancer Biotherapy, Xuzhou Medical University, 209 Tongshan Road, Xuzhou, 221004, Jiangsu, China
| | - Mingyi Xia
- Cancer Institute, Xuzhou Medical University, 209 Tongshan Road, Xuzhou, 221004, Jiangsu, China
- Center of Clinical Oncology, The Affiliated Hospital of Xuzhou Medical University, 99 West Huaihai Road, Xuzhou, 221002, Jiangsu, China
- Jiangsu Center for the Collaboration and Innovation of Cancer Biotherapy, Xuzhou Medical University, 209 Tongshan Road, Xuzhou, 221004, Jiangsu, China
| | - Lishun Xiao
- Department of Biostatistics, School of Public Health, Xuzhou Medical University, Xuzhou, China
| | - Bao Zhu
- Cancer Institute, Xuzhou Medical University, 209 Tongshan Road, Xuzhou, 221004, Jiangsu, China
- Center of Clinical Oncology, The Affiliated Hospital of Xuzhou Medical University, 99 West Huaihai Road, Xuzhou, 221002, Jiangsu, China
- Jiangsu Center for the Collaboration and Innovation of Cancer Biotherapy, Xuzhou Medical University, 209 Tongshan Road, Xuzhou, 221004, Jiangsu, China
| | - Hui Wang
- Cancer Institute, Xuzhou Medical University, 209 Tongshan Road, Xuzhou, 221004, Jiangsu, China
- Center of Clinical Oncology, The Affiliated Hospital of Xuzhou Medical University, 99 West Huaihai Road, Xuzhou, 221002, Jiangsu, China
- Jiangsu Center for the Collaboration and Innovation of Cancer Biotherapy, Xuzhou Medical University, 209 Tongshan Road, Xuzhou, 221004, Jiangsu, China
| | - Xiang Li
- Department of Neurosurgery, The Affiliated Hospital of Xuzhou Medical University, 99 West Huaihai Road, Xuzhou, 221000, Jiangsu, China.
| | - Jiehui Di
- Cancer Institute, Xuzhou Medical University, 209 Tongshan Road, Xuzhou, 221004, Jiangsu, China.
- Center of Clinical Oncology, The Affiliated Hospital of Xuzhou Medical University, 99 West Huaihai Road, Xuzhou, 221002, Jiangsu, China.
- Jiangsu Center for the Collaboration and Innovation of Cancer Biotherapy, Xuzhou Medical University, 209 Tongshan Road, Xuzhou, 221004, Jiangsu, China.
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Wang J, Sun T. Mir-25-3p in extracellular vesicles from fibroblast-like synoviocytes alleviates pyroptosis of chondrocytes in knee osteoarthritis. J Bioenerg Biomembr 2023; 55:365-380. [PMID: 37725203 DOI: 10.1007/s10863-023-09964-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Accepted: 03/29/2023] [Indexed: 09/21/2023]
Abstract
Knee osteoarthritis (KOA) is defined as a joint disease that occurs mostly among elderly people. Fibroblast-like synoviocytes-derived extracellular vesicles (FLS-EVs) have impacts on the treatment of OA. This study elucidated the mechanism of miR-25-3p in pyroptosis of chondrocytes in KOA. FLSs and EVs were extracted from neonatal mice; destabilization of the medial meniscus (DMM) was used to simulate KOA in mice, followed by the evaluation of cartilage damage and the contents of MMP-3 and MMP-13 in KOA mice. Lipopolysaccharide (LPS) was used to induce inflammation damage in mouse chondrocytes ATDC5, and the cell viability and the expressions of NLRP3, Cleaved-Caspase-1, GSDMD-N, IL-18, and IL-1β were examined. We found that FLS-EV treatment mitigated the knee-joint damage and symptoms of KOA mice, decreased MMP-3 and MMP-13, and inhibited pyroptosis of chondrocytes in DMM mice and LPS-induced ATD5 cells. Then, Cy3-labeled miR-25-3p in mice chondrocytes was observed and the expressions and the binding relation of miR-25-3p and cytoplasmic polyadenylation element-binding protein 1 (CPEB1) were verified. It showed that FLS-EVs carried miR-25-3p into chondrocytes, and upregulated miR-25-3p expression while inhibited CPEB1 transcription, resulting in mitigation of pyroptosis of chondrocytes, and CPEB1 overexpression reversed the inhibition of FLS-EVs on pyroptosis of chondrocytes in KOA.
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Affiliation(s)
- Jianhang Wang
- Trauma department of orthopedics Yantaishan Hospital, 10087 Keji Avenue, Laishan District, Yantai, Shandong, 264003, China
| | - Tao Sun
- Trauma department of orthopedics Yantaishan Hospital, 10087 Keji Avenue, Laishan District, Yantai, Shandong, 264003, China.
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Feng Y, Zhu S, Liu T, Zhi G, Shao B, Liu J, Li B, Jiang C, Feng Q, Wu P, Wang D. Surmounting Cancer Drug Resistance: New Perspective on RNA-Binding Proteins. Pharmaceuticals (Basel) 2023; 16:1114. [PMID: 37631029 PMCID: PMC10458901 DOI: 10.3390/ph16081114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 07/20/2023] [Accepted: 08/02/2023] [Indexed: 08/27/2023] Open
Abstract
RNA-binding proteins (RBPs), being pivotal elements in both physiological and pathological processes, possess the ability to directly impact RNA, thereby exerting a profound influence on cellular life. Furthermore, the dysregulation of RBPs not only induces alterations in the expression levels of genes associated with cancer but also impairs the occurrence of post-transcriptional regulatory mechanisms. Consequently, these circumstances can give rise to aberrations in cellular processes, ultimately resulting in alterations within the proteome. An aberrant proteome can disrupt the equilibrium between oncogenes and tumor suppressor genes, promoting cancer progression. Given their significant role in modulating gene expression and post-transcriptional regulation, directing therapeutic interventions towards RBPs represents a viable strategy for combating drug resistance in cancer treatment. RBPs possess significant potential as diagnostic and prognostic markers for diverse cancer types. Gaining comprehensive insights into the structure and functionality of RBPs, along with delving deeper into the molecular mechanisms underlying RBPs in tumor drug resistance, can enhance cancer treatment strategies and augment the prognostic outcomes for individuals afflicted with cancer.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | - Peijie Wu
- School of Basic Medical Sciences and State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China; (Y.F.); (S.Z.); (T.L.); (G.Z.); (B.S.); (J.L.); (B.L.); (C.J.); (Q.F.)
| | - Dong Wang
- School of Basic Medical Sciences and State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China; (Y.F.); (S.Z.); (T.L.); (G.Z.); (B.S.); (J.L.); (B.L.); (C.J.); (Q.F.)
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6
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Mao Y, Cai F, Jiang T, Zhu X. Identification Invasion-Related Long Non-Coding RNAs in Lung Adenocarcinoma and Analysis of Competitive Endogenous RNA Regulatory Networks. Int J Gen Med 2023; 16:1817-1831. [PMID: 37213476 PMCID: PMC10198273 DOI: 10.2147/ijgm.s407266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2023] [Accepted: 05/01/2023] [Indexed: 05/23/2023] Open
Abstract
Background Cell invasion plays a vital role in cancer development and progression. Aberrant expression of long non-coding RNAs (lncRNAs) is also critical in carcinogenesis. However, the prognostic value of invasion-related lncRNAs in lung adenocarcinoma (LUAD) remains unknown. Methods Differentially expressed mRNAs (DEmRNAs), lncRNAs (DElncRNAs), and microRNAs (DEmiRNAs) were between LUAD and control samples. Pearson correlation analyses were performed to screen for invasion-related DElncRNAs (DEIRLs). Univariate and multivariate Cox regression algorithms were applied to identify key genes and construct the risk score model, which was evaluated using receiver operating characteristic (ROC) curves. Gene set enrichment analysis (GSEA) was used to explore the underlying pathways of the risk model. Moreover, an invasion-related competitive endogenous RNA (ceRNA) regulatory network was constructed. Reverse transcription-quantitative polymerase chain reaction (RT-qPCR) was performed to detect the expression of prognostic lncRNAs in the LUAD and control samples. Results A total of 45 DElncRNAs were identified as DEIRLs. RP3-525N10.2, LINC00857, EP300-AS1, PDZRN3-AS1, and RP5-1102E8.3 were potential prognostic lncRNAs, the expression of which was verified by RT-qPCR in LUAD samples. Both the risk score model and nomogram used the prognostic lncRNAs. ROC curves showed the risk score model had moderate accuracy and the nomogram had high accuracy in predicting patient prognosis. GSEA results indicated that the risk score model was associated with many biological processes and pathways relevant to cell proliferation. A ceRNA regulatory network was constructed in which PDZRN3-miR-96-5p-CPEB1, EP300-AS1-miR-93-5p-CORO2B, and RP3-525N10.2-miR-130a-5p-GHR may be key invasion-related regulatory pathways in LUAD. Conclusion Our study identified five novel invasion-related prognostic lncRNAs (RP3-525N10.2, LINC00857, EP300-AS1, PDZRN3-AS1, and RP5-1102E8.3) and established an accurate model for predicting the prognosis of patients with LUAD. These findings enrich our understanding of the relationships between cell invasion, lncRNAs, and LUAD and may provide novel treatment directions.
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Affiliation(s)
- Yuze Mao
- Department of Cardio-Thoracic Surgery, First Affiliated Hospital of Jiamusi University, Jiamusi, Heilongjiang, 154000, People’s Republic of China
| | - Fangyu Cai
- Department of Thoracic Surgery, Beidahuang Industry Group General Hospital, Harbin, Heilongjiang, 150088, People’s Republic of China
| | - Tengjiao Jiang
- Department of Cardio-Thoracic Surgery, First Affiliated Hospital of Jiamusi University, Jiamusi, Heilongjiang, 154000, People’s Republic of China
| | - Xiaofeng Zhu
- Department of Cardio-Thoracic Surgery, First Affiliated Hospital of Jiamusi University, Jiamusi, Heilongjiang, 154000, People’s Republic of China
- Correspondence: Xiaofeng Zhu, Department of Cardio-Thoracic Surgery, First Affiliated Hospital of Jiamusi University, Jiamusi, Heilongjiang, 154000, People’s Republic of China, Tel +86-13845456700, Email
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Mehta M, Raguraman R, Ramesh R, Munshi A. RNA binding proteins (RBPs) and their role in DNA damage and radiation response in cancer. Adv Drug Deliv Rev 2022; 191:114569. [PMID: 36252617 PMCID: PMC10411638 DOI: 10.1016/j.addr.2022.114569] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Revised: 09/27/2022] [Accepted: 09/29/2022] [Indexed: 01/24/2023]
Abstract
Traditionally majority of eukaryotic gene expression is influenced by transcriptional and post-transcriptional events. Alterations in the expression of proteins that act post-transcriptionally can affect cellular signaling and homeostasis. RNA binding proteins (RBPs) are a family of proteins that specifically bind to RNAs and are involved in post-transcriptional regulation of gene expression and important cellular processes such as cell differentiation and metabolism. Deregulation of RNA-RBP interactions and any changes in RBP expression or function can lead to various diseases including cancer. In cancer cells, RBPs play an important role in regulating the expression of tumor suppressors and oncoproteins involved in various cell-signaling pathways. Several RBPs such as HuR, AUF1, RBM38, LIN28, RBM24, tristetrapolin family and Musashi play critical roles in various types of cancers and their aberrant expression in cancer cells makes them an attractive therapeutic target for cancer treatment. In this review we provide an overview of i). RBPs involved in cancer progression and their mechanism of action ii). the role of RBPs, including HuR, in breast cancer progression and DNA damage response and iii). explore RBPs with emphasis on HuR as therapeutic target for breast cancer therapy.
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Affiliation(s)
- Meghna Mehta
- Department of Radiation Oncology, The University of Oklahoma Health Sciences Center, Oklahoma City, OK 73013, USA; Stephenson Cancer Center, The University of Oklahoma Health Sciences Center, Oklahoma City, OK 73013, USA
| | - Rajeswari Raguraman
- Department of Pathology, The University of Oklahoma Health Sciences Center, Oklahoma City, OK 73013, USA; Stephenson Cancer Center, The University of Oklahoma Health Sciences Center, Oklahoma City, OK 73013, USA
| | - Rajagopal Ramesh
- Department of Pathology, The University of Oklahoma Health Sciences Center, Oklahoma City, OK 73013, USA; Stephenson Cancer Center, The University of Oklahoma Health Sciences Center, Oklahoma City, OK 73013, USA
| | - Anupama Munshi
- Department of Radiation Oncology, The University of Oklahoma Health Sciences Center, Oklahoma City, OK 73013, USA; Stephenson Cancer Center, The University of Oklahoma Health Sciences Center, Oklahoma City, OK 73013, USA.
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RNA-binding proteins: Underestimated contributors in tumorigenesis. Semin Cancer Biol 2022; 86:431-444. [PMID: 35124196 DOI: 10.1016/j.semcancer.2022.01.010] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Revised: 01/17/2022] [Accepted: 01/28/2022] [Indexed: 02/07/2023]
Abstract
mRNA export, translation, splicing, cleavage or capping determine mRNA stability, which represents one of the primary aspects regulating gene expression and function. RNA-binding proteins (RBPs) bind to their target mRNAs to regulate multiple cell functions by increasing or reducing their stability. In recent decades, studies of the role of RBPs in tumorigenesis have revealed an increasing number of proteins impacting the prognosis, diagnosis and cancer treatment. Several RBPs have been identified based on their interactions with oncogenes or tumor suppressor genes in human cancers, which are involved in apoptosis, the epithelial-mesenchymal transition (EMT), DNA repair, autophagy, cell proliferation, immune response, metabolism, and the regulation of noncoding RNAs. In this review, we propose a model showing how RBP mutations influence tumorigenesis, and we update the current knowledge regarding the molecular mechanism by which RBPs regulate cancer. Special attention is being devoted to RBPs that represent prognostic and diagnostic factors in cancer patients.
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Zhou Y, Xiao L, Long G, Cao J, Liu S, Tao Y, Zhou L, Tang J. Identification of senescence-related subtypes, establishment of a prognosis model, and characterization of a tumor microenvironment infiltration in breast cancer. Front Immunol 2022; 13:921182. [PMID: 36072578 PMCID: PMC9441960 DOI: 10.3389/fimmu.2022.921182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2022] [Accepted: 07/29/2022] [Indexed: 01/10/2023] Open
Abstract
Breast cancer is a malignancy with the highest incidence and mortality in women worldwide. Senescence is a model of arrest in the cell cycle, which plays an important role in tumor progression, while the prognostic value of cellular senescence-related genes (SRGs) in evaluating immune infiltration and clinical outcomes of breast cancer needs further investigation. In the present study, we identified two distinct molecular subtypes according to the expression profiles of 278 SRGs. We further explored the dysregulated pathways between the two subtypes and constructed a microenvironmental landscape of breast cancer. Subsequently, we established a senescence-related scoring signature based on the expression of four SRGs in the training set (GSE21653) and validated its accuracy in two validation sets (GSE20685 and GSE25055). In the training set, patients in the high-risk group had a worse prognosis than patients in the low-risk group. Multivariate Cox regression analysis showed that risk score was an independent prognostic indicator. Receiver operating characteristic curve (ROC) analysis proved the predictive accuracy of the signature. The prognostic value of this signature was further confirmed in the validation sets. We also observed that a lower risk score was associated with a higher pathological response rate in patients with neoadjuvant chemotherapy. We next performed functional experiments to validate the results above. Our study demonstrated that these cellular senescence patterns effectively grouped patients at low or high risk of disease recurrence and revealed their potential roles in the tumor–immune–stromal microenvironment. These findings enhanced our understanding of the tumor immune microenvironment and provided new insights for improving the prognosis of breast cancer patients.
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Affiliation(s)
- Yanling Zhou
- Department of Oncology, Institute of Medical Sciences, National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, China
- Department of Liver Surgery, Xiangya Hospital, Central South University, Changsha, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, China
| | - Liang Xiao
- Department of Liver Surgery, Xiangya Hospital, Central South University, Changsha, China
| | - Guo Long
- Department of Liver Surgery, Xiangya Hospital, Central South University, Changsha, China
| | - Jing Cao
- Department of Breast, Xiangya Hospital, Central South University, Changsha, China
| | - Shuang Liu
- Department of Oncology, Institute of Medical Sciences, National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, China
| | - Yongguang Tao
- Key Laboratory of Carcinogenesis and Cancer Invasion, Ministry of Education, Department of Pathology, Xiangya Hospital, Central South University, Changsha, China
- Key Laboratory of Carcinogenesis of the Ministry of Health, Cancer Research Institute, School of Basic Medicine, Central South University, Changsha, China
- Department of Thoracic Surgery, Hunan Key Laboratory of Tumor Models and Individualized Medicine, Second Xiangya Hospital, Central South University, Changsha, China
| | - Ledu Zhou
- Department of Liver Surgery, Xiangya Hospital, Central South University, Changsha, China
| | - Jianing Tang
- Department of Liver Surgery, Xiangya Hospital, Central South University, Changsha, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, China
- *Correspondence: Jianing Tang,
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10
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Lu X, Zhong J, Liu L, Zhang W, Zhao S, Chen L, Wei Y, Zhang H, Wu J, Chen W, Ge F. The function and regulatory mechanism of RNA-binding proteins in breast cancer and their future clinical treatment prospects. Front Oncol 2022; 12:929037. [PMID: 36052258 PMCID: PMC9424610 DOI: 10.3389/fonc.2022.929037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Accepted: 07/25/2022] [Indexed: 11/19/2022] Open
Abstract
Breast cancer is the most common female malignancy, but the mechanisms regulating gene expression leading to its development are complex. In recent years, as epigenetic research has intensified, RNA-binding proteins (RBPs) have been identified as a class of posttranscriptional regulators that can participate in regulating gene expression through the regulation of RNA stabilization and degradation, intracellular localization, alternative splicing and alternative polyadenylation, and translational control. RBPs play an important role in the development of normal mammary glands and breast cancer. Functional inactivation or abnormal expression of RBPs may be closely associated with breast cancer development. In this review, we focus on the function and regulatory mechanisms of RBPs in breast cancer, as well as the advantages and challenges of RBPs as potential diagnostic and therapeutic targets in breast cancer, and discuss the potential of RBPs in clinical treatment.
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Affiliation(s)
- Xingjia Lu
- Department of Breast Surgery, First Affiliated Hospital of Kunming Medical University, Kunming, China
- Kunming Medical University, No. 1 School of Clinical Medicine, Kunming, China
| | - Jian Zhong
- Department of Reproductive Medicine, Affiliated Jinling Hospital, Nanjing Medical University, Nanjing, China
- Department of Gynecology, Women’s Hospital of Nanjing Medical University, Nanjing, China
| | - Linlin Liu
- School of Forensic Medicine, Kunming Medical University, Kunming, China
| | - Wenzhu Zhang
- Department of Breast Surgery, First Affiliated Hospital of Kunming Medical University, Kunming, China
- Kunming Medical University, No. 1 School of Clinical Medicine, Kunming, China
| | - Shengdi Zhao
- Department of Breast Surgery, First Affiliated Hospital of Kunming Medical University, Kunming, China
- Kunming Medical University, No. 1 School of Clinical Medicine, Kunming, China
| | - Liang Chen
- Department of Breast Surgery, First Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Yuxian Wei
- Department of Endocrine Breast Surgery, First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Hong Zhang
- Department of Breast Surgery, First Affiliated Hospital of Kunming Medical University, Kunming, China
- Kunming Medical University, No. 1 School of Clinical Medicine, Kunming, China
| | - Jingxuan Wu
- Department of Breast Surgery, First Affiliated Hospital of Kunming Medical University, Kunming, China
- Kunming Medical University, No. 1 School of Clinical Medicine, Kunming, China
| | - Wenlin Chen
- Third Department of Breast Surgery, The Third Affiliated Hospital of Kunming Medical University, Kunming, China
- *Correspondence: Wenlin Chen, ; Fei Ge,
| | - Fei Ge
- Department of Breast Surgery, First Affiliated Hospital of Kunming Medical University, Kunming, China
- *Correspondence: Wenlin Chen, ; Fei Ge,
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Wang G, Ji X, Li P, Wang W. Human bone marrow mesenchymal stem cell-derived exosomes containing microRNA-425 promote migration, invasion and lung metastasis by down-regulating CPEB1. Regen Ther 2022; 20:107-116. [PMID: 35582707 PMCID: PMC9061616 DOI: 10.1016/j.reth.2022.03.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Revised: 02/24/2022] [Accepted: 03/17/2022] [Indexed: 01/23/2023] Open
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12
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AGO-RBP crosstalk on target mRNAs: Implications in miRNA-guided gene silencing and cancer. Transl Oncol 2022; 21:101434. [PMID: 35477066 PMCID: PMC9136600 DOI: 10.1016/j.tranon.2022.101434] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2022] [Accepted: 04/12/2022] [Indexed: 12/18/2022] Open
Abstract
MicroRNAs (miRNAs) and RNA-binding proteins (RBPs) are important regulators of mRNA translation and stability in eukaryotes. While miRNAs can only bind their target mRNAs in association with Argonaute proteins (AGOs), RBPs directly bind their targets either as single entities or in complex with other RBPs to control mRNA metabolism. miRNA binding in 3' untranslated regions (3' UTRs) of mRNAs facilitates an intricate network of interactions between miRNA-AGO and RBPs, thus determining the fate of overlapping targets. Here, we review the current knowledge on the interplay between miRNA-AGO and multiple RBPs in different cellular contexts, the rules underlying their synergism and antagonism on target mRNAs, as well as highlight the implications of these regulatory modules in cancer initiation and progression.
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13
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RBM24 in the Post-Transcriptional Regulation of Cancer Progression: Anti-Tumor or Pro-Tumor Activity? Cancers (Basel) 2022; 14:cancers14071843. [PMID: 35406615 PMCID: PMC8997389 DOI: 10.3390/cancers14071843] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Revised: 03/30/2022] [Accepted: 04/01/2022] [Indexed: 12/11/2022] Open
Abstract
Simple Summary RBM24 is a highly conserved RNA-binding protein that plays critical roles in the post-transcriptional regulation of gene expression for initiating cell differentiation during embryonic development and for maintaining tissue homeostasis in adult life. Evidence is now accumulating that it is frequently dysregulated across human cancers. Importantly, RBM24 may act as a tumor suppressor or as an oncogene in a context- or background-dependent manner. Its activity can be regulated by protein–protein interactions and post-translational modifications, making it a potential therapeutic target for cancer treatment. However, molecular mechanisms underlying its function in tumor growth and metastasis remain elusive. Further investigation will be necessary to better understand how its post-transcriptional regulatory activity is controlled and how it is implicated in tumor progression. This review provides a comprehensive analysis of recent findings on the implication of RBM24 in cancer and proposes future research directions to delve more deeply into the mechanisms underlying its tumor-suppressive function or oncogenic activity. Abstract RNA-binding proteins are critical post-transcriptional regulators of gene expression. They are implicated in a wide range of physiological and pathological processes by modulating nearly every aspect of RNA metabolisms. Alterations in their expression and function disrupt tissue homeostasis and lead to the occurrence of various cancers. RBM24 is a highly conserved protein that binds to a large spectrum of target mRNAs and regulates many post-transcriptional events ranging from pre-mRNA splicing to mRNA stability, polyadenylation and translation. Studies using different animal models indicate that it plays an essential role in promoting cellular differentiation during organogenesis and tissue regeneration. Evidence is also accumulating that its dysregulation frequently occurs across human cancers. In several tissues, RBM24 clearly functions as a tumor suppressor, which is consistent with its inhibitory potential on cell proliferation. However, upregulation of RBM24 in other cancers appears to promote tumor growth. There is a possibility that RBM24 displays both anti-tumor and pro-tumor activities, which may be regulated in part through differential interactions with its protein partners and by its post-translational modifications. This makes it a potential biomarker for diagnosis and prognosis, as well as a therapeutic target for cancer treatment. The challenge remains to determine the post-transcriptional mechanisms by which RBM24 modulates gene expression and tumor progression in a context- or background-dependent manner. This review discusses recent findings on the potential function of RBM24 in tumorigenesis and provides future directions for better understanding its regulatory role in cancer cells.
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14
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RNA-binding proteins and cancer metastasis. Semin Cancer Biol 2022; 86:748-768. [PMID: 35339667 DOI: 10.1016/j.semcancer.2022.03.018] [Citation(s) in RCA: 41] [Impact Index Per Article: 20.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Revised: 03/18/2022] [Accepted: 03/21/2022] [Indexed: 12/13/2022]
Abstract
RNA-binding proteins (RBPs) can regulate gene expression through post-transcriptionally influencing all manner of RNA biology, including alternative splicing (AS), polyadenylation, stability, and translation of mRNAs, as well as microRNAs (miRNAs) and circular RNAs (circRNAs) processing. There is accumulating evidence reinforcing the perception that dysregulation or dysfunction of RBPs can lead to various human diseases, including cancers. RBPs influence diverse cancer-associated cellular phenotypes, such as proliferation, apoptosis, senescence, migration, invasion, and angiogenesis, contributing to the initiation and development of tumors, as well as clinical prognosis. Metastasis is the leading cause of cancer-related recurrence and death. Therefore, it is necessary to elucidate the molecular mechanisms behind tumor metastasis. In fact, a growing body of published research has proved that RBPs play pivotal roles in cancer metastasis. In this review, we will summarize the recent advances for helping us understand the role of RBPs in tumor metastasis, and discuss dysfunctions and dysregulations of RBPs affecting metastasis-associated processes including epithelial-mesenchymal transition (EMT), migration, and invasion of cancer cells. Furthermore, we will discuss emerging RBP-based strategy for the treatment of cancer metastasis.
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15
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Kim YM, Seong HS, Kim YS, Hong JK, Sa SJ, Lee J, Lee JH, Cho KH, Chung WH, Choi JW, Cho ES. Genome-Wide Assessment of a Korean Composite Pig Breed, Woori-Heukdon. Front Genet 2022; 13:779152. [PMID: 35186025 PMCID: PMC8847790 DOI: 10.3389/fgene.2022.779152] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2021] [Accepted: 01/07/2022] [Indexed: 02/03/2023] Open
Abstract
A Korean synthetic pig breed, Woori-Heukdon (WRH; F3), was developed by crossing parental breeds (Korean native pig [KNP] and Korean Duroc [DUC]) with their crossbred populations (F1 and F2). This study in genome-wide assessed a total of 2,074 pigs which include the crossbred and the parental populations using the Illumina PorcineSNP60 BeadChip. After quality control of the initial datasets, we performed population structure, genetic diversity, and runs of homozygosity (ROH) analyses. Population structure analyses showed that crossbred populations were genetically influenced by the parental breeds according to their generation stage in the crossbreeding scheme. Moreover, principal component analysis showed the dispersed cluster of WRH, which might reflect introducing a new breeding group into the previous one. Expected heterozygosity values, which were used to assess genetic diversity, were .365, .349, .336, .330, and .211 for WRH, F2, F1, DUC, and KNP, respectively. The inbreeding coefficient based on ROH was the highest in KNP (.409), followed by WRH (.186), DUC (.178), F2 (.107), and F1 (.035). Moreover, the frequency of short ROH decreased according to the crossing stage (from F1 to WRH). Alternatively, the frequency of medium and long ROH increased, which indicated recent inbreeding in F2 and WRH. Furthermore, gene annotation of the ROH islands in WRH that might be inherited from their parental breeds revealed several interesting candidate genes that may be associated with adaptation, meat quality, production, and reproduction traits in pigs.
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Affiliation(s)
- Yong-Min Kim
- Swine Science Division, National Institute of Animal Science, Rural Development Administration, Cheonan, South Korea.,Department of Animal Science, College of Animal Life Sciences, Kangwon National University, Chuncheon, South Korea
| | - Ha-Seung Seong
- Swine Science Division, National Institute of Animal Science, Rural Development Administration, Cheonan, South Korea.,Department of Animal Science, College of Animal Life Sciences, Kangwon National University, Chuncheon, South Korea
| | - Young-Sin Kim
- Swine Science Division, National Institute of Animal Science, Rural Development Administration, Cheonan, South Korea
| | - Joon-Ki Hong
- Swine Science Division, National Institute of Animal Science, Rural Development Administration, Cheonan, South Korea
| | - Soo-Jin Sa
- Swine Science Division, National Institute of Animal Science, Rural Development Administration, Cheonan, South Korea
| | - Jungjae Lee
- Department of Animal Science and Technology, College of Biotechnology and Natural Resources, Chung-Ang University, Anseong, South Korea
| | - Jun-Hee Lee
- Institute of Agriculture and Life Science, College of Agriculture and Life Sciences, Gyeongsang National University, Jinju, South Korea
| | - Kyu-Ho Cho
- Swine Science Division, National Institute of Animal Science, Rural Development Administration, Cheonan, South Korea
| | - Won-Hyong Chung
- Research Group of Healthcare, Korea Food Research Institute, Wanju, South Korea
| | - Jung-Woo Choi
- Department of Animal Science, College of Animal Life Sciences, Kangwon National University, Chuncheon, South Korea
| | - Eun-Seok Cho
- Swine Science Division, National Institute of Animal Science, Rural Development Administration, Cheonan, South Korea
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16
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CPEB1 directs muscle stem cell activation by reprogramming the translational landscape. Nat Commun 2022; 13:947. [PMID: 35177647 PMCID: PMC8854658 DOI: 10.1038/s41467-022-28612-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Accepted: 01/14/2022] [Indexed: 11/08/2022] Open
Abstract
Skeletal muscle stem cells, also called Satellite Cells (SCs), are actively maintained in quiescence but can activate quickly upon extrinsic stimuli. However, the mechanisms of how quiescent SCs (QSCs) activate swiftly remain elusive. Here, using a whole mouse perfusion fixation approach to obtain bona fide QSCs, we identify massive proteomic changes during the quiescence-to-activation transition in pathways such as chromatin maintenance, metabolism, transcription, and translation. Discordant correlation of transcriptomic and proteomic changes reveals potential translational regulation upon SC activation. Importantly, we show Cytoplasmic Polyadenylation Element Binding protein 1 (CPEB1), post-transcriptionally affects protein translation during SC activation by binding to the 3' UTRs of different transcripts. We demonstrate phosphorylation-dependent CPEB1 promoted Myod1 protein synthesis by binding to the cytoplasmic polyadenylation elements (CPEs) within its 3' UTRs to regulate SC activation and muscle regeneration. Our study characterizes CPEB1 as a key regulator to reprogram the translational landscape directing SC activation and subsequent proliferation.
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17
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Nsengimana B, Khan FA, Ngowi EE, Zhou X, Jin Y, Jia Y, Wei W, Ji S. Processing body (P-body) and its mediators in cancer. Mol Cell Biochem 2022; 477:1217-1238. [PMID: 35089528 DOI: 10.1007/s11010-022-04359-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Accepted: 01/11/2022] [Indexed: 12/24/2022]
Abstract
In recent years, processing bodies (P-bodies) formed by liquid-liquid phase separation, have attracted growing scientific attention due to their involvement in numerous cellular activities, including the regulation of mRNAs decay or storage. These cytoplasmic dynamic membraneless granules contain mRNA storage and decay components such as deadenylase and decapping factors. In addition, different mRNA metabolic regulators, including m6A readers and gene-mediated miRNA-silencing, are also associated with such P-bodies. Cancerous cells may profit from these mRNA decay shredders by up-regulating the expression level of oncogenes and down-regulating tumor suppressor genes. The main challenges of cancer treatment are drug resistance, metastasis, and cancer relapse likely associated with cancer stem cells, heterogeneity, and plasticity features of different tumors. The mRNA metabolic regulators based on P-bodies play a great role in cancer development and progression. The dysregulation of P-bodies mediators affects mRNA metabolism. However, less is known about the relationship between P-bodies mediators and cancerous behavior. The current review summarizes the recent studies on P-bodies mediators, their contribution to tumor development, and their potential in the clinical setting, particularly highlighting the P-bodies as potential drug-carriers such as exosomes to anticancer in the future.
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Affiliation(s)
- Bernard Nsengimana
- Laboratory of Cell Signal Transduction, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Henan University, Henan, 475004, People's Republic of China
| | - Faiz Ali Khan
- Laboratory of Cell Signal Transduction, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Henan University, Henan, 475004, People's Republic of China
| | - Ebenezeri Erasto Ngowi
- Laboratory of Cell Signal Transduction, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Henan University, Henan, 475004, People's Republic of China
| | - Xuefeng Zhou
- Department of Oncology, Dongtai Affiliated Hospital of Nantong University, Dongtai, 224200, Jiangsu, People's Republic of China
| | - Yu Jin
- Laboratory of Cell Signal Transduction, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Henan University, Henan, 475004, People's Republic of China
| | - Yuting Jia
- Laboratory of Cell Signal Transduction, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Henan University, Henan, 475004, People's Republic of China
| | - Wenqiang Wei
- Laboratory of Cell Signal Transduction, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Henan University, Henan, 475004, People's Republic of China.
| | - Shaoping Ji
- Laboratory of Cell Signal Transduction, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Henan University, Henan, 475004, People's Republic of China.
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18
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Wu J, Wu Y, Guo Q, Wang S, Wu X. RNA-binding proteins in ovarian cancer: a novel avenue of their roles in diagnosis and treatment. J Transl Med 2022; 20:37. [PMID: 35062979 PMCID: PMC8783520 DOI: 10.1186/s12967-022-03245-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Accepted: 01/11/2022] [Indexed: 12/18/2022] Open
Abstract
Ovarian cancer (OC), an important cause of cancer-related death in women worldwide, is one of the most malignant cancers and is characterized by a poor prognosis. RNA-binding proteins (RBPs), a class of endogenous proteins that can bind to mRNAs and modify (or even determine) the amount of protein they can generate, have attracted great attention in the context of various diseases, especially cancers. Compelling studies have suggested that RBPs are aberrantly expressed in different cancer tissues and cell types, including OC tissues and cells. More specifically, RBPs can regulate proliferation, apoptosis, invasion, metastasis, tumorigenesis and chemosensitivity and serve as potential therapeutic targets in OC. Herein, we summarize what is currently known about the biogenesis, molecular functions and potential roles of human RBPs in OC and their prospects for application in the clinical treatment of OC.
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Affiliation(s)
- Jiangchun Wu
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, China.,Department of Gynecologic Oncology, Fudan University Shanghai Cancer Center, Fudan University, Shanghai, 200032, People's Republic of China
| | - Yong Wu
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, China.,Department of Gynecologic Oncology, Fudan University Shanghai Cancer Center, Fudan University, Shanghai, 200032, People's Republic of China
| | - Qinhao Guo
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, China.,Department of Gynecologic Oncology, Fudan University Shanghai Cancer Center, Fudan University, Shanghai, 200032, People's Republic of China
| | - Simin Wang
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, China.,Department of Gynecologic Oncology, Fudan University Shanghai Cancer Center, Fudan University, Shanghai, 200032, People's Republic of China
| | - Xiaohua Wu
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, China. .,Department of Gynecologic Oncology, Fudan University Shanghai Cancer Center, Fudan University, Shanghai, 200032, People's Republic of China.
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19
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Zhou Z, Liu T, Li Z, Wang L. Circ_0003732 promotes osteosarcoma progression through regulating miR-377-3p/CPEB1 axis and Wnt/β-catenin signaling pathway. Anticancer Drugs 2022; 33:e299-e310. [PMID: 34407049 DOI: 10.1097/cad.0000000000001206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Osteosarcoma is a prevalent malignant bone cancer. This study aimed to explore the biologic role and potential mechanism of circ_0003732 in osteosarcoma carcinogenesis. Quantitative real-time PCR was implemented to detect the RNA expression of circ_0003732, microRNA-377-3p (miR-377-3p) and cytoplasmic polyadenylation element-binding protein 1 (CPEB1). Cell proliferation was evaluated by cell counting kit-8 assay and colony formation assay. Transwell, wound healing and flow cytometry assays were employed to assess cell migration, invasion and apoptosis. In addition, the interaction between miR-377-3p and circ_0003732 or CPEB1 was validated by dual-luciferase reporter assay. The protein expression was detected by western blot assay or immunohistochemistry assay. Xenograft tumor assay was performed to explore the regulation of circ_0003732 on osteosarcoma tumor growth in vivo. Circ_0003732 was upregulated in osteosarcoma tissues and cells. Knockdown of circ_0003732 suppressed osteosarcoma cell proliferation, migration, invasion and triggered cell apoptosis in vitro, as well as reduced osteosarcoma tumor growth in vivo. Meanwhile, miR-377-3p could bind to circ_0003732 and CPEB1 and miR-377-3p inhibitor could reverse the effects of circ_0003732 silence on osteosarcoma cell progression. Furthermore, CPEB1 overexpression could overturn the suppressive impacts of miR-377-3p on osteosarcoma progression. In addition, circ_0003732 silence restrained Wnt/β-catenin signaling pathway via regulating miR-377-3p in osteosarcoma cells. Circ_0003732 might play a positive role in the malignant progression of osteosarcoma by regulating the miR-377-3p/CPEB1 axis and activating the Wnt/β-catenin signaling pathway, which might provide new insights for osteosarcoma therapy.
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Affiliation(s)
- Zheng Zhou
- Department Of Orthopedics, The Second Xiangya Hospital Of Central South University, China
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20
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Balvey A, Fernandez M. Translational Control in Liver Disease. Front Physiol 2021; 12:795298. [PMID: 34912244 PMCID: PMC8667601 DOI: 10.3389/fphys.2021.795298] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Accepted: 11/08/2021] [Indexed: 12/12/2022] Open
Abstract
Chronic liver disease is one of the biggest threats to public health worldwide. Worryingly, the incidence of liver disease is dramatically rising due to the aging of the population and the global epidemics of obesity. Both are major risk factors for chronic liver disease and adverse prognostic factors, causing an increase in mortality rate. It is of great concern that 80–95% of obese people have non-alcoholic fatty liver disease, the major precursor for liver failure and a global health challenge. Currently, the only curative treatment for advanced chronic liver disease is liver transplantation, which is, however, hampered by high treatment costs and the scarcity of donor organs. New strategies are therefore urgently needed to prevent and reverse chronic liver disease. And for that it is essential to understand better the molecular mechanisms underlying human disease. This review focuses on the abnormalities in the regulation of translation by RNA-binding proteins during chronic liver disease and their pathological impact on portal hypertension, fibrosis, steatosis, neovascularization, and cancer development.
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Affiliation(s)
- Alexandra Balvey
- Laboratory of Translational Control in Liver Disease and Cancer, IDIBAPS Biomedical Research Institute, University of Barcelona, Barcelona, Spain
| | - Mercedes Fernandez
- Laboratory of Translational Control in Liver Disease and Cancer, IDIBAPS Biomedical Research Institute, University of Barcelona, Barcelona, Spain
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21
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Song H, Ruan C, Xu Y, Xu T, Fan R, Jiang T, Cao M, Song J. Survival stratification for colorectal cancer via multi-omics integration using an autoencoder-based model. Exp Biol Med (Maywood) 2021; 247:898-909. [PMID: 34904882 DOI: 10.1177/15353702211065010] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Prognosis stratification in colorectal cancer helps to address cancer heterogeneity and contributes to the improvement of tailored treatments for colorectal cancer patients. In this study, an autoencoder-based model was implemented to predict the prognosis of colorectal cancer via the integration of multi-omics data. DNA methylation, RNA-seq, and miRNA-seq data from The Cancer Genome Atlas (TCGA) database were integrated as input for the autoencoder, and 175 transformed features were produced. The survival-related features were used to cluster the samples using k-means clustering. The autoencoder-based strategy was compared to the principal component analysis (PCA)-, t-distributed random neighbor embedded (t-SNE)-, non-negative matrix factorization (NMF)-, or individual Cox proportional hazards (Cox-PH)-based strategies. Using the 175 transformed features, tumor samples were clustered into two groups (G1 and G2) with significantly different survival rates. The autoencoder-based strategy performed better at identifying survival-related features than the other transformation strategies. Further, the two survival groups were robustly validated using "hold-out" validation and five validation cohorts. Gene expression profiles, miRNA profiles, DNA methylation, and signaling pathway profiles varied from the poor prognosis group (G2) to the good prognosis group (G1). miRNA-mRNA networks were constructed using six differentially expressed miRNAs (let-7c, mir-34c, mir-133b, let-7e, mir-144, and mir-106a) and 19 predicted target genes. The autoencoder-based computational framework could distinguish good prognosis samples from bad prognosis samples and facilitate a better understanding of the molecular biology of colorectal cancer.
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Affiliation(s)
- Hu Song
- Department of Gastrointestinal Surgery, the Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu 221002, PR China
| | - Chengwei Ruan
- Department of Anorectal Surgery, the Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu 221002, PR China
| | - Yixin Xu
- Department of Gastrointestinal Surgery, the Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu 221002, PR China
| | - Teng Xu
- Department of Gastrointestinal Surgery, the Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu 221002, PR China
| | - Ruizhi Fan
- Department of Gastrointestinal Surgery, the Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu 221002, PR China
| | - Tao Jiang
- Department of Gastrointestinal Surgery, the Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu 221002, PR China
| | - Meng Cao
- Department of Gastrointestinal Surgery, the Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu 221002, PR China
| | - Jun Song
- Department of Gastrointestinal Surgery, the Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu 221002, PR China
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22
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The Estrogen Receptor α Signaling Pathway Controls Alternative Splicing in the Absence of Ligands in Breast Cancer Cells. Cancers (Basel) 2021; 13:cancers13246261. [PMID: 34944881 PMCID: PMC8699117 DOI: 10.3390/cancers13246261] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Revised: 11/30/2021] [Accepted: 12/10/2021] [Indexed: 12/21/2022] Open
Abstract
Background: The transcriptional activity of estrogen receptor α (ERα) in breast cancer (BC) is extensively characterized. Our group has previously shown that ERα controls the expression of a number of genes in its unliganded form (apoERα), among which a large group of RNA-binding proteins (RBPs) encode genes, suggesting its role in the control of co- and post-transcriptional events. Methods: apoERα-mediated RNA processing events were characterized by the analysis of transcript usage and alternative splicing changes in an RNA-sequencing dataset from MCF-7 cells after siRNA-induced ERα downregulation. Results: ApoERα depletion induced an expression change of 681 RBPs, including 84 splicing factors involved in translation, ribonucleoprotein complex assembly, and 3′end processing. ApoERα depletion results in 758 isoform switching events with effects on 3′end length and the splicing of alternative cassette exons. The functional enrichment of these events shows that post-transcriptional regulation is part of the mechanisms by which apoERα controls epithelial-to-mesenchymal transition and BC cell proliferation. In primary BCs, the inclusion levels of the experimentally identified alternatively spliced exons are associated with overall and disease-free survival. Conclusion: Our data supports the role of apoERα in maintaining the luminal phenotype of BC cells by extensively regulating gene expression at the alternative splicing level.
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23
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Oe S, Hayashi S, Tanaka S, Koike T, Hirahara Y, Kakizaki R, Sakamoto S, Noda Y, Yamada H, Kitada M. Cpeb1 expression is post-transcriptionally regulated by AUF1, CPEB1, and microRNAs. FEBS Open Bio 2021; 12:82-94. [PMID: 34480525 PMCID: PMC8727934 DOI: 10.1002/2211-5463.13286] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2021] [Revised: 08/23/2021] [Accepted: 09/02/2021] [Indexed: 01/04/2023] Open
Abstract
Cytoplasmic polyadenylation element binding protein 1 (CPEB1) regulates the translation of numerous mRNAs. We previously showed that AU‐rich binding factor 1 (AUF1) regulates Cpeb1 expression through the 3’ untranslated region (3’UTR). To investigate the molecular basis of the regulatory potential of the Cpeb1 3’UTR, here we performed reporter analyses that examined expression levels of Gfp reporter mRNA containing the Cpeb1 3’UTR. Our findings indicate that CPEB1 represses the translation of Cpeb1 mRNA and that miR‐145a‐5p and let‐7b‐5p are involved in the reduction in Cpeb1 expression in the absence of AUF1. These results suggest that Cpeb1 expression is post‐transcriptionally regulated by AUF1, CPEB1, and microRNAs.
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Affiliation(s)
- Souichi Oe
- Department of Anatomy, Kansai Medical University, Hirakata, Japan
| | - Shinichi Hayashi
- Department of Anatomy, Kansai Medical University, Hirakata, Japan
| | - Susumu Tanaka
- Department of Anatomy, Kansai Medical University, Hirakata, Japan
| | - Taro Koike
- Department of Anatomy, Kansai Medical University, Hirakata, Japan
| | - Yukie Hirahara
- Department of Anatomy, Kansai Medical University, Hirakata, Japan
| | - Rio Kakizaki
- Department of Anatomy, Kansai Medical University, Hirakata, Japan
| | - Sumika Sakamoto
- Department of Anatomy, Kansai Medical University, Hirakata, Japan
| | - Yasuko Noda
- Department of Anatomy, Bio-imaging and Neuro-cell Science, Jichi Medical University, Shimotsuke, Japan
| | - Hisao Yamada
- Biwako Professional University of Rehabilitation, Higashi-Ohmi, Japan
| | - Masaaki Kitada
- Department of Anatomy, Kansai Medical University, Hirakata, Japan
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24
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Wang J, Wang T, Zhang Y, Liu J, Song J, Han Y, Wang L, Yang S, Zhu L, Geng R, Li W, Yu X. CPEB1 enhances erastin-induced ferroptosis in gastric cancer cells by suppressing twist1 expression. IUBMB Life 2021; 73:1180-1190. [PMID: 34184391 DOI: 10.1002/iub.2525] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Revised: 06/22/2021] [Accepted: 06/22/2021] [Indexed: 12/18/2022]
Abstract
The induction of ferroptosis is considered a new strategy for cancer treatment. Cytoplasmic polyadenylation element binding protein 1 (CPEB1) is a post-transcriptional regulatory factor, whose low expression has been reported to link to the enhanced metastasis and angiogenesis of gastric cancer (GC). In this study, to explore the role of CPEB1 in ferroptosis, GC cells with overexpressed or silenced CPEB1 expression were treated with erastin, a classic ferroptosis inducer. The results showed that erastin dose-dependently decreased the viability of four GC cell lines (AGS, SNU-1, Hs-746 T, and HGC-27), suggesting that ferroptosis could be triggered in these GC cells. Interestingly, HGC-27 cells overexpressing CPEB1 were more sensitive to erastin, generated more lipid reactive oxygen species (ROS) and malondialdehyde (MDA), and their glutathione peroxidase 4 (Gpx4) expression and GSH content were reduced. Contrarily, CPEB1-silenced AGS cells were more resistant to erastin. Mechanically, we demonstrated that CPEB1 overexpression reduced the expression of twist1, an inhibitor of activating transcription factor 4 (ATF4), thereby activating the ATF4/ChaC Glutathione Specific Gamma-Glutamylcyclotransferase 1 (CHAC1) pathway (CHAC1, a molecule known to induce GSH degradation). Furthermore, re-expression of twist1 in GC cells impaired the effects of CPEB1 overexpression in presence of erastin. Additionally, similar to the in vitro results, the growth-inhibiting effects of erastin on GC xenografted tumors were also augmented by CPEB1 overexpression in vivo. Collectively, we demonstrate that CPEB1 facilitates erastin-induced ferroptosis by inhibiting twist1.
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Affiliation(s)
- Jing Wang
- Department of Biology, School of Basic Medical Sciences, Mudanjiang Medical University, Mudanjiang, Heilongjiang, China
- Department of Biochemistry and Molecular Biology, Harbin Medical University, Harbin, Heilongjiang, China
| | - Tao Wang
- Department of Ultrasound, Hongqi Hospital of Mudanjiang Medical University, Mudanjiang, Heilongjiang, China
| | - Yang Zhang
- Department of Laboratory Medicine, Hongqi Hospital of Mudanjiang Medical University, Mudanjiang, Heilongjiang, China
| | - Jiaqi Liu
- Laboratory of Morphology, Mudanjiang Medical University, Mudanjiang, Heilongjiang, China
| | - Jie Song
- Department of Biology, School of Basic Medical Sciences, Mudanjiang Medical University, Mudanjiang, Heilongjiang, China
| | - Yanlong Han
- Department of Biology, School of Basic Medical Sciences, Mudanjiang Medical University, Mudanjiang, Heilongjiang, China
| | - Lihong Wang
- Department of Electrical Diagnosis, Jilin Neuropsychiatric Hospital, Siping, Jilin, China
| | - Shuang Yang
- Office of Academic Affairs, Mudanjiang Medical University, Mudanjiang, Heilongjiang, China
| | - Lili Zhu
- Department of Foreign Language, Mudanjiang Medical University, Mudanjiang, Heilongjiang, China
| | - Rui Geng
- Office of Student Affairs, School of Basic Medical Sciences, Mudanjiang Medical University, Mudanjiang, Heilongjiang, China
| | - Weimin Li
- Department of Imaging, The Second Affiliated Hospital of Mudanjiang Medical University, Mudanjiang, Heilongjiang, China
| | - Xiaoguang Yu
- Department of Biochemistry and Molecular Biology, Harbin Medical University, Harbin, Heilongjiang, China
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25
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Kelaini S, Chan C, Cornelius VA, Margariti A. RNA-Binding Proteins Hold Key Roles in Function, Dysfunction, and Disease. BIOLOGY 2021; 10:biology10050366. [PMID: 33923168 PMCID: PMC8146904 DOI: 10.3390/biology10050366] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 04/21/2021] [Accepted: 04/21/2021] [Indexed: 02/06/2023]
Abstract
RNA-binding proteins (RBPs) are multi-faceted proteins in the regulation of RNA or its RNA splicing, localisation, stability, and translation. Amassing proof from many recent and dedicated studies reinforces the perception of RBPs exerting control through differing expression levels, cellular localization and post-transcriptional alterations. However, since the regulation of RBPs is reliant on the micro-environment and events like stress response and metabolism, their binding affinities and the resulting RNA-RBP networks may be affected. Therefore, any misregulation and disruption in the features of RNA and its related homeostasis can lead to a number of diseases that include diabetes, cardiovascular disease, and other disorders such as cancer and neurodegenerative diseases. As such, correct regulation of RNA and RBPs is crucial to good health as the effect RBPs exert through loss of function can cause pathogenesis. In this review, we will discuss the significance of RBPs and their typical function and how this can be disrupted in disease.
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26
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Shao K, Pu W, Zhang J, Guo S, Qian F, Glurich I, Jin Q, Ma Y, Ju S, Zhang Z, Ding W. DNA hypermethylation contributes to colorectal cancer metastasis by regulating the binding of CEBPB and TFCP2 to the CPEB1 promoter. Clin Epigenetics 2021; 13:89. [PMID: 33892791 PMCID: PMC8063327 DOI: 10.1186/s13148-021-01071-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Accepted: 04/07/2021] [Indexed: 01/05/2023] Open
Abstract
Background Aberrant DNA methylation has been firmly established as a factor contributing to the pathogenesis of colorectal cancer (CRC) via its capacity to silence tumour suppressor genes. However, the methylation status of multiple tumour suppressor genes and their roles in promoting CRC metastasis are not well characterised. Methods We explored the methylation and expression profiles of CPEB1 (the gene encoding cytoplasmic polyadenylation element-binding protein 1), a candidate CRC tumour suppressor gene, using The Cancer Genome Atlas (TCGA) database and validated these results in both CRC cell lines and cells from Han Chinese CRC patients (n = 104). The functional role of CPEB1 in CRC was examined in experiments performed in vitro and in vivo. A candidate transcription factor capable of regulating CPEB1 expression was predicted in silico and validated by luciferase reporter, DNA pull-down, and electrophoretic mobility shift assays. Results Hypermethylation and decreased expression of CPEB1 in CRC tumour tissues were revealed by TCGA database. We also identified a significant inverse correlation (Pearson’s R = − 0.43, P < 0.001) between promoter methylation and CPEB1 expression. We validated these results in CRC samples and two CRC cell lines. We also demonstrated that up-regulation of CPEB1 resulted in significantly decreased tumour growth, migration, invasion, and tumorigenicity and promoted tumour cell apoptosis both in vitro and in vivo. We identified the transcription factors CCAAT enhancer-binding protein beta (CEBPB) and transcription factor CP2 (TFCP2) as critical regulators of CPEB1 expression. Hypermethylation of the CPEB1 promoter resulted in a simultaneous increase in the capacity for TFCP2 binding and a decreased likelihood of CEBPB binding, both of which led to diminished expression of CPEB1. Conclusions Our results identified a novel tumour-suppressive role of CPEB1 in CRC and found that hypermethylation of the CPEB1 promoter may lead to diminished expression due to decreased chromatin accessibility and transcription factor binding. Collectively, these results suggest a potential role for CPEB1 in the diagnosis and treatment of CRC. Supplementary Information The online version contains supplementary material available at 10.1186/s13148-021-01071-z.
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Affiliation(s)
- Keke Shao
- Department of Laboratory Medicine, the First People's Hospital of Yancheng City/Affiliated Hospital 4 of Nantong University, Yancheng, Jiangsu Province, China
| | - Weilin Pu
- Department of Laboratory Medicine, Affiliated Hospital of Nantong University, Nantong, Jiangsu Province, China.,State Key Laboratory of Genetic Engineering, Collaborative Innovation Center for Genetics and Development, School of Life Sciences, Fudan University, Shanghai, China
| | - Jianfeng Zhang
- Department of Gastroenterology, Affiliated Hospital of Nantong University, Nantong, Jiangsu Province, China
| | - Shicheng Guo
- Department of Medical Genetics, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, WI, USA.,Center for Precision Medicine Research, Marshfield Clinic Research Institute, Marshfield, WI, USA
| | - Fei Qian
- Department of Gastrointestinal Surgery, Affiliated Hospital of Nantong University, Nantong, Jiangsu Province, China
| | - Ingrid Glurich
- Office of Research Support Services, Marshfield Clinic Research Institute, Marshfield, WI, USA
| | - Qing Jin
- Department of Pathology, Affiliated Hospital of Nantong University, Nantong, Jiangsu Province, China
| | - Yanyun Ma
- State Key Laboratory of Genetic Engineering, Collaborative Innovation Center for Genetics and Development, School of Life Sciences, Fudan University, Shanghai, China.,Six Industrial Research Institute, Fudan University, Shanghai, China.,Human Phenome Institute, Fudan University, Shanghai, China
| | - Shaoqing Ju
- Department of Laboratory Medicine, Affiliated Hospital of Nantong University, Nantong, Jiangsu Province, China
| | - Zhao Zhang
- Department of Biochemistry and Molecular Biology, McGovern Medical School at The University of Texas Health Science Center at Houston, Houston, TX, 77030, USA.
| | - Weifeng Ding
- Department of Laboratory Medicine, Affiliated Hospital of Nantong University, Nantong, Jiangsu Province, China.
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27
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Jia Y, Zhao J, Yang J, Shao J, Cai Z. miR-301 regulates the SIRT1/SOX2 pathway via CPEB1 in the breast cancer progression. MOLECULAR THERAPY-ONCOLYTICS 2021; 22:13-26. [PMID: 34377766 PMCID: PMC8313741 DOI: 10.1016/j.omto.2021.03.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Accepted: 03/09/2021] [Indexed: 12/28/2022]
Abstract
Breast cancer, the most common malignant tumor in women, has become a worldwide burden for family and society. MicroRNAs (miRNAs or miRs) are recognized as critical mediators of cancer-related processes, since they have the ability to coordinately suppress multiple target genes. In this study, we aim to find out specific miRNAs involved in the progression of breast cancer and explore the underlying molecular mechanism. Bioinformatics analysis suggested miR-301 as a differentially overexpressed miRNA in breast cancer, which was confirmed by expression determination. Functional assays were employed to explore the effect of miR-301 and its downstream effectors cytoplasmic polyadenylation element-binding protein 1 (CPEB1), SIRT1, and SOX2 on malignant phenotypes of breast cancer. The interaction among these factors was explained using luciferase and RNA immunoprecipitation (RIP) assays. In addition, the in vivo impact of miR-301 on breast cancer was assessed by cellular tumorigenicity in nude mice. We found that miR-301 overexpression restricted CPEB1 level and further promoted cell proliferation, metastasis, and cell cycle progression and impeded apoptosis. Moreover, CPEB1 regulated breast cancer development by mediating the SIRT1/SOX2 pathway. Further, miR-301 overexpression accelerated tumor formation in nude mice. Our results indicate that miR-301 overexpression accelerates the progression of breast cancer through the CPEB1/SIRT1/SOX2 axis.
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Affiliation(s)
- Yanjing Jia
- Department of General Surgery, Huashan Hospital, Fudan University, Shanghai 200040, PR China
| | - Jie Zhao
- Department of Nursing, North Branch of Huashan Hospital, Fudan University, Shanghai 200040, PR China
| | - Jinjie Yang
- Shanghai MCC Hospital, Shanghai 201900, PR China
| | - Jie Shao
- Department of General Surgery, Huashan Hospital, Fudan University, Shanghai 200040, PR China
| | - Zihao Cai
- Department of General Surgery, Huashan Hospital, Fudan University, Shanghai 200040, PR China
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28
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Hutchins EJ, Bronner ME. A Spectrum of Cell States During the Epithelial-to-Mesenchymal Transition. Methods Mol Biol 2021; 2179:3-6. [PMID: 32939707 DOI: 10.1007/978-1-0716-0779-4_1] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The epithelial-to-mesenchymal transition (EMT) encompasses a complex cascade of events through which a cell transits to reduce its epithelial characteristics and become migratory. Classically, this transition has been considered complete upon loss of molecular markers characteristic of an "epithelial" state and acquisition of those associated with "mesenchymal" cells. Recently, however, evidence from both developmental and cancer EMT contexts suggest that cells undergoing EMT are often heterogeneous, concomitantly expressing both epithelial and mesenchymal markers to varying degrees; rather, cells frequently display a "partial" EMT phenotype and do not necessarily require full "mesenchymalization" to become migratory. Here, we offer a brief perspective on recent important advances in our fundamental understanding of the spectrum of cellular states that occur during partial EMT in the context of development and cancer metastasis.
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Affiliation(s)
- Erica J Hutchins
- Department of Biology and Biological Engineering, California Institute of Technology, Pasadena, CA, USA
| | - Marianne E Bronner
- Department of Biology and Biological Engineering, California Institute of Technology, Pasadena, CA, USA.
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29
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Zhao Y, Song Y, Zhao R, Zhao M, Huang Q. Gene Panel of Persister Cells as a Prognostic Indicator for Tumor Repopulation After Radiation. Front Oncol 2020; 10:607727. [PMID: 33330109 PMCID: PMC7714959 DOI: 10.3389/fonc.2020.607727] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Accepted: 10/14/2020] [Indexed: 12/12/2022] Open
Abstract
Tumor repopulation during cycles of radiotherapy limits the radio-response in ensuing cycles and causes failure of treatment. It is thus of vital importance to unveil the mechanisms underlying tumor repopulating cells. Increasing evidence suggests that a subpopulation of drug-tolerant persister cancer cells (DTPs) could survive the cytotoxic treatment and resume to propagate. Whether these persister cells contribute to development of radio-resistance remains elusive. Based on the genetic profiling of DTPs by integrating datasets from Gene Expression Omnibus database, this study aimed to provide novel insights into tumor-repopulation mediated radio-resistance and identify predictive biomarkers for radio-response in clinic. A prognostic risk index, grounded on four persister genes (LYNX1, SYNPO, GADD45B, and PDLIM1), was constructed in non-small-cell lung cancer patients from The Cancer Genome Atlas Program (TCGA) using stepwise Cox regression analysis. Weighted gene co-expression network analysis further confirmed the interaction among persister-gene based risk score, radio-response and overall survival time. In addition, the predictive role of risk index was validated in vitro and in other types of TCGA patients. Gene set enrichment analysis was performed to decipher the possible biological signaling, which indicated that two forces behind persister cells, stress response and survival adaptation, might fuel the tumor repopulation after radiation. Targeting these persister cells may represent a new prognostic and therapeutic approach to enhance radio-response and prevent radio-resistance induced by tumor repopulation.
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Affiliation(s)
- Yucui Zhao
- Cancer Center, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yanwei Song
- Cancer Center, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Ruyi Zhao
- Cancer Center, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Minghui Zhao
- Cancer Center, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Qian Huang
- Cancer Center, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
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30
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Oe S, Koike T, Hirahara Y, Tanaka S, Hayashi S, Nakano Y, Kase M, Noda Y, Yamada H, Kitada M. AUF1, an mRNA decay factor, has a discordant role in Cpeb1 expression. Biochem Biophys Res Commun 2020; 534:491-497. [PMID: 33220927 DOI: 10.1016/j.bbrc.2020.11.054] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Accepted: 11/12/2020] [Indexed: 12/19/2022]
Abstract
Cytoplasmic polyadenylation element binding protein 1 (CPEB1) regulates polyadenylation and subsequent translation of CPE-containing mRNAs involved in various physiological and pathological phenomena. Although the significance of CPEB1-mediated translational regulation has recently been reported, the detailed regulatory mechanism of Cpeb1 expression remains unclear. To elucidate the post-transcriptional regulatory mechanisms of Cpeb1 expression, we constructed reporter plasmids containing various deletions or mutations in the Cpeb1 mRNA 3' untranslated region (3'UTR). We investigated their expression levels in Neuro2a neuroblastoma cells. We found that Cpeb1 expression is regulated through an AU-rich element in its 3'UTR. Furthermore, the mRNA decay factor AU-rich binding factor 1 (AUF1) regulates Cpeb1 expression, and knockdown of AUF1 upregulates Cpeb1 mRNA expression but results in a decrease in CPEB1 protein levels. These findings indicate that AUF1 has a discordant role in the expression of Cpeb1.
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Affiliation(s)
- Souichi Oe
- Department of Anatomy, Kansai Medical University, Hirakata, Osaka, 573-1010, Japan.
| | - Taro Koike
- Department of Anatomy, Kansai Medical University, Hirakata, Osaka, 573-1010, Japan
| | - Yukie Hirahara
- Department of Anatomy, Kansai Medical University, Hirakata, Osaka, 573-1010, Japan
| | - Susumu Tanaka
- Department of Anatomy, Kansai Medical University, Hirakata, Osaka, 573-1010, Japan
| | - Shinichi Hayashi
- Department of Anatomy, Kansai Medical University, Hirakata, Osaka, 573-1010, Japan
| | - Yosuke Nakano
- Department of Anatomy, Kansai Medical University, Hirakata, Osaka, 573-1010, Japan
| | - Masahiko Kase
- Department of Anatomy, Kansai Medical University, Hirakata, Osaka, 573-1010, Japan
| | - Yasuko Noda
- Department of Anatomy, Bio-imaging and Neuro-cell Science, Jichi Medical University, Shimotsuke, Tochigi, 329-0498, Japan
| | - Hisao Yamada
- Biwako Professional University of Rehabilitation, Higashi-Ohmi, Shiga, 527-0145, Japan
| | - Masaaki Kitada
- Department of Anatomy, Kansai Medical University, Hirakata, Osaka, 573-1010, Japan
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31
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Li K, Guo ZW, Zhai XM, Yang XX, Wu YS, Liu TC. RBPTD: a database of cancer-related RNA-binding proteins in humans. DATABASE-THE JOURNAL OF BIOLOGICAL DATABASES AND CURATION 2020; 2020:5734253. [PMID: 32047888 PMCID: PMC7012770 DOI: 10.1093/database/baz156] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/11/2019] [Revised: 12/05/2019] [Accepted: 12/23/2019] [Indexed: 12/12/2022]
Abstract
RNA-binding proteins (RBPs) play important roles in regulating the expression of genes involved in human physiological and pathological processes, especially in cancers. Many RBPs have been found to be dysregulated in cancers; however, there was no tool to incorporate high-throughput data from different dimensions to systematically identify cancer-related RBPs and to explore their causes of abnormality and their potential functions. Therefore, we developed a database named RBPTD to identify cancer-related RBPs in humans and systematically explore their functions and abnormalities by integrating different types of data, including gene expression profiles, prognosis data and DNA copy number variation (CNV), among 28 cancers. We found a total of 454 significantly differentially expressed RBPs, 1970 RBPs with significant prognostic value, and 53 dysregulated RBPs correlated with CNV abnormality. Functions of 26 cancer-related RBPs were explored by analysing high-throughput RNA sequencing data obtained by crosslinking immunoprecipitation, and the remaining RBP functions were predicted by calculating their correlation coefficient with other genes. Finally, we developed the RBPTD for users to explore functions and abnormalities of cancer-related RBPs to improve our understanding of their roles in tumorigenesis. Database URL: http: //www.rbptd.com
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Affiliation(s)
- Kun Li
- Institute of Antibody Engineering, School of Laboratory Medicine and Biotechnology, Southern Medical University, 1838 N. Guangzhou Ave, Guangzhou, 510515, China
| | - Zhi-Wei Guo
- Institute of Antibody Engineering, School of Laboratory Medicine and Biotechnology, Southern Medical University, 1838 N. Guangzhou Ave, Guangzhou, 510515, China
| | - Xiang-Ming Zhai
- Institute of Antibody Engineering, School of Laboratory Medicine and Biotechnology, Southern Medical University, 1838 N. Guangzhou Ave, Guangzhou, 510515, China
| | - Xue-Xi Yang
- Institute of Antibody Engineering, School of Laboratory Medicine and Biotechnology, Southern Medical University, 1838 N. Guangzhou Ave, Guangzhou, 510515, China
| | - Ying-Song Wu
- Institute of Antibody Engineering, School of Laboratory Medicine and Biotechnology, Southern Medical University, 1838 N. Guangzhou Ave, Guangzhou, 510515, China
| | - Tian-Cai Liu
- Institute of Antibody Engineering, School of Laboratory Medicine and Biotechnology, Southern Medical University, 1838 N. Guangzhou Ave, Guangzhou, 510515, China
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32
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Rajabi F, Liu-Bordes WY, Pinskaya M, Dominika F, Kratassiouk G, Pinna G, Nanni S, Farsetti A, Gespach C, Londoño-Vallejo A, Groisman I. CPEB1 orchestrates a fine-tuning of miR-145-5p tumor-suppressive activity on TWIST1 translation in prostate cancer cells. Oncotarget 2020; 11:4155-4168. [PMID: 33227047 PMCID: PMC7665230 DOI: 10.18632/oncotarget.27806] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Accepted: 10/27/2020] [Indexed: 11/25/2022] Open
Abstract
TWIST1 is a basic helix-loop-helix transcription factor, and one of the master Epithelial-to-Mesenchymal Transition (EMT) regulators. We show that tumor suppressor miR-145-5p controls TWIST1 expression in an immortalized prostate epithelial cell line and in a tumorigenic prostate cancer-derived cell line. Indeed, shRNA-mediated miR-145-5p silencing enhanced TWIST1 expression and induced EMT-associated malignant properties in these cells. However, we discovered that the translational inhibitory effect of miR-145-5p on TWIST1 is lost in 22Rv1, another prostate cancer cell line that intrinsically expresses high levels of the CPEB1 cytoplasmic polyadenylation element binding protein. This translational regulator typically reduces TWIST1 translation efficiency by shortening the TWIST1 mRNA polyA tail. However, our results indicate that the presence of CPEB1 also interferes with the binding of miR-145-5p to the TWIST1 mRNA 3′UTR. Mechanistically, CPEB1 binding to its first cognate site either directly hampers the access to the miR-145-5p response element or redirects the cleavage/polyadenylation machinery to an intermediate polyadenylation site, resulting in the elimination of the miR-145-5p binding site. Taken together, our data support the notion that the tumor suppressive activity of miR-145-5p on TWIST1 translation, consequently on EMT, self-renewal, and migration, depends on the CPEB1 expression status of the cancer cell. A preliminary prospective study using clinical samples suggests that reconsidering the relative status of miR-145-5p/TWIST1 and CPEB1 in the tumors of prostate cancer patients may bear prognostic value.
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Affiliation(s)
- Fatemeh Rajabi
- Telomeres and Cancer Laboratory, CNRS, Sorbonne Université, Université PSL, Institut Curie, Paris, France
| | - Win-Yan Liu-Bordes
- Telomeres and Cancer Laboratory, CNRS, Sorbonne Université, Université PSL, Institut Curie, Paris, France
| | - Marina Pinskaya
- Non-Coding RNA, Epigenetic and Genome Fluidity, Sorbonne Université, Université PSL, Institut Curie, Paris, France
| | - Foretek Dominika
- Non-Coding RNA, Epigenetic and Genome Fluidity, Sorbonne Université, Université PSL, Institut Curie, Paris, France
| | - Gueorgui Kratassiouk
- Plateforme ARN Interférence, Service de Biologie Intégrative et de Génétique Moléculaire (SBIGeM), Gif-sur-Yvette, France
| | - Guillaume Pinna
- Plateforme ARN Interférence, Service de Biologie Intégrative et de Génétique Moléculaire (SBIGeM), Gif-sur-Yvette, France
| | - Simona Nanni
- Istituto di Patologia Medica, Università Cattolica del Sacro Cuore, Rome, Italy.,Fondazione Policlinico Universitario A. Gemelli IRCCS, Roma, Italy
| | - Antonella Farsetti
- Istituto di Biologia Cellulare e Neurobiologia, Consiglio Nazionale delle Ricerche (CNR), Rome, Italy
| | - Christian Gespach
- Sorbonne Université, Inserm U938, Team TGFβ Signaling in Cellular Plasticity and Cancer, Centre de Recherche Saint-Antoine, Paris, France
| | - Arturo Londoño-Vallejo
- Telomeres and Cancer Laboratory, CNRS, Sorbonne Université, Université PSL, Institut Curie, Paris, France
| | - Irina Groisman
- Telomeres and Cancer Laboratory, CNRS, Sorbonne Université, Université PSL, Institut Curie, Paris, France
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33
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Sovijit W, Sovijit W, Ishii Y, Kambe J, Fujita T, Watanabe G, Yamaguchi H, Nagaoka K. Estrogen promotes increased breast cancer cell proliferation and migration through downregulation of CPEB1 expression. Biochem Biophys Res Commun 2020; 534:871-876. [PMID: 33162033 DOI: 10.1016/j.bbrc.2020.10.085] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Accepted: 10/28/2020] [Indexed: 12/31/2022]
Abstract
The polyadenylation element binding protein 1 (CPEB1) plays an important role in the regulation of poly(A) tail length at the 3'UTR of mRNA during transcription. Downregulation of CPEB1 expression, which is associated with the loss of mammary epithelial polarity, has been reported in breast cancer. CPEB1 downregulation leads to an increase in tumor aggressiveness of breast cancer. Breast cancer is also known to be responsive to the treatment with steroid hormones, which promotes cancer development and progression; however, the nature of these associations remains unclear. This study aimed to investigate whether estrogen and progesterone impacted CPEB1 expression in breast cancer in order to regulate cell proliferation and migration. MCF7 cell proliferation was increased in response to estrogen treatment, and estrogen application suppressed the expression of CPEB1 mRNA. Cells treated with estrogen or those depleted for CPEB1 by shRNA showed increased wound healing capacity compared with that of control cells in migration assay. Moreover, we found that CPEB1 level of expression in human breast cancer tissue was low compared with that in the healthy tissue. CPEB1 expression was downregulated in response to estrogen activity and in turn, that caused a significantly induced cell migration in breast cancer cells. This suggests that CPEB1 is one of the estrogen responsive genes, which stimulates breast cancer progression. Increasing and/or maintaining CPEB1 expression level has the potential to control breast cancer behavior.
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Affiliation(s)
- Watcharee Sovijit
- Laboratory of Veterinary Physiology, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu-shi, Tokyo, 183-8509, Japan
| | - Watcharin Sovijit
- Laboratory of Veterinary Physiology, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu-shi, Tokyo, 183-8509, Japan
| | - Yuriko Ishii
- Laboratory of Veterinary Physiology, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu-shi, Tokyo, 183-8509, Japan
| | - Jun Kambe
- Laboratory of Veterinary Physiology, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu-shi, Tokyo, 183-8509, Japan
| | - Tomoyuki Fujita
- Department of Breast Surgery, Tokyo Medical University Ibaraki Medical Center, 3-20-1 Chuo, Ami-cho, Ibaraki, 300-0395, Japan
| | - Gen Watanabe
- Laboratory of Veterinary Physiology, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu-shi, Tokyo, 183-8509, Japan
| | - Hirohito Yamaguchi
- Cancer Research Center, Qatar Biomedical Research Institute, Hamad Bin Khalifa University, Qatar Foundation, P.O Box 34110, Doha, Qatar
| | - Kentaro Nagaoka
- Laboratory of Veterinary Physiology, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu-shi, Tokyo, 183-8509, Japan.
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34
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Pant D, Narayanan SP, Vijay N, Shukla S. Hypoxia-induced changes in intragenic DNA methylation correlate with alternative splicing in breast cancer. J Biosci 2020. [PMID: 31965981 DOI: 10.1007/s12038-019-9977-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
The tumor microenvironment is marked by gradients in the level of oxygen and nutrients, with oxygen levels reaching a minimum at the core of the tumor, a condition known as tumor hypoxia. Mediated by members of the HIF family of transcription factors, hypoxia leads to a more aggressive tumor phenotype by transactivation of several genes as well as reprogramming of pre-mRNA splicing. Intragenic DNA methylation, which is known to affect alternative splicing in cancer, could be one of several reasons behind the changes in splicing patterns under hypoxia. Here, we have tried to establish a correlation between intragenicDNA methylation and alternative usage of exons in tumor hypoxia. First, we have generated a customhypoxia signature consisting of 34 genes that are upregulated under hypoxia and are direct targets of HIF-1α. Using this gene expression signature, we have successfully stratified publicly available breast cancer patient samples into hypoxia positive and hypoxia negative groups followed by mining of differentially spliced isoforms between these groups. The Hypoxia Hallmark signature from MSigDB was also used independently to stratify the same tumor samples into hypoxic and normoxic.We found that 821 genes were showing differential splicing between samples stratified using a custom signature, whereas, 911 genes were showing differential splicing between samples stratified using the MSigDB signature. Finally, we performed multiple correlation tests between the methylation levels (β) of microarray probes located within 1 kilo base pairs of isoform-specific exons using those exons' expression levels in the same patient samples in which the methylation level was recorded. We found that the expression level of one of the exons ofDHX32 and BICD2 significantly correlated with the methylation levels, and we were also able to predict patient survival (p-value: 0.02 for DHX32 and 0.0024 for BICD2). Our findings provide new insights into the potential functional role of intragenic DNA methylation in modulating alternative splicing during hypoxia.
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Affiliation(s)
- Deepak Pant
- Department of Biological Sciences, Indian Institute of Science Education and Research Bhopal, Bhopal 462 066, India
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CPEB3-mediated MTDH mRNA translational suppression restrains hepatocellular carcinoma progression. Cell Death Dis 2020; 11:792. [PMID: 32968053 PMCID: PMC7511356 DOI: 10.1038/s41419-020-02984-y] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Revised: 08/30/2020] [Accepted: 09/04/2020] [Indexed: 12/14/2022]
Abstract
Cytoplasmic polyadenylation element-binding protein 3 (CPEB3) is a sequence-specific RNA-binding protein. We had reported that CPEB3 is involved in hepatocellular carcinoma (HCC) progression. However, the underlying mechanisms of CPEB3 in HCC remain unclear. In this study, we firstly performed RNA immunoprecipitation to uncover the transcriptome-wide CPEB3-bound mRNAs (CPEB3 binder) in HCC. Bioinformatic analysis indicates that CPEB3 binders are closely related to cancer progression, especially HCC metastasis. Further studies confirmed that metadherin (MTDH) is a direct target of CPEB3. CPEB3 can suppress the translation of MTDH mRNA in vivo and in vitro. Besides, luciferase assay demonstrated that CPEB3 interacted with 3'-untranslated region of MTDH mRNA and inhibited its translation. Subsequently, CPEB3 inhibited the epithelial-mesenchymal transition and metastasis of HCC cells through post-transcriptional regulation of MTDH. In addition, cpeb3 knockout mice are more susceptible to carcinogen-induced hepatocarcinogenesis and subsequent lung metastasis. Our results also indicated that CPEB3 was a good prognosis marker, which is downregulated in HCC tissue. In conclusion, our results demonstrated that CPEB3 played an important role in HCC progression and targeting CPEB3-mediated mRNA translation might be a favorable therapeutic approach.
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Kang D, Lee Y, Lee JS. RNA-Binding Proteins in Cancer: Functional and Therapeutic Perspectives. Cancers (Basel) 2020; 12:cancers12092699. [PMID: 32967226 PMCID: PMC7563379 DOI: 10.3390/cancers12092699] [Citation(s) in RCA: 64] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Revised: 09/17/2020] [Accepted: 09/18/2020] [Indexed: 12/12/2022] Open
Abstract
Simple Summary RNA-binding proteins (RBPs) play central roles in regulating posttranscriptional expression of genes. Many of them are known to be deregulated in a wide variety of cancers. Dysregulated RBPs influence the expression levels of target RNAs related to cancer phenotypes, such as proliferation, apoptosis, angiogenesis, senescence, and EMT/invasion/metastasis. Thus, understanding the molecular functions of RBPs and their roles in cancer-related phenotypes can lead to improved therapeutic strategies. Abstract RNA-binding proteins (RBPs) crucially regulate gene expression through post-transcriptional regulation, such as by modulating microRNA (miRNA) processing and the alternative splicing, alternative polyadenylation, subcellular localization, stability, and translation of RNAs. More than 1500 RBPs have been identified to date, and many of them are known to be deregulated in cancer. Alterations in the expression and localization of RBPs can influence the expression levels of oncogenes, tumor-suppressor genes, and genome stability-related genes. RBP-mediated gene regulation can lead to diverse cancer-related cellular phenotypes, such as proliferation, apoptosis, angiogenesis, senescence, and epithelial-mesenchymal transition (EMT)/invasion/metastasis. This regulation can also be associated with cancer prognosis. Thus, RBPs can be potential targets for the development of therapeutics for the cancer treatment. In this review, we describe the molecular functions of RBPs, their roles in cancer-related cellular phenotypes, and various approaches that may be used to target RBPs for cancer treatment.
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Affiliation(s)
- Donghee Kang
- Medical Research Center, College of Medicine, Inha University, Incheon 22212, Korea; (D.K.); (Y.L.)
- Department of Molecular Medicine, College of Medicine, Inha University, Incheon 22212, Korea
- Program in Biomedical Science & Engineering, Inha University Graduate School, Incheon 22212, Korea
| | - Yerim Lee
- Medical Research Center, College of Medicine, Inha University, Incheon 22212, Korea; (D.K.); (Y.L.)
- Department of Molecular Medicine, College of Medicine, Inha University, Incheon 22212, Korea
| | - Jae-Seon Lee
- Medical Research Center, College of Medicine, Inha University, Incheon 22212, Korea; (D.K.); (Y.L.)
- Department of Molecular Medicine, College of Medicine, Inha University, Incheon 22212, Korea
- Program in Biomedical Science & Engineering, Inha University Graduate School, Incheon 22212, Korea
- Correspondence: ; Tel.: +82-32-860-9832
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Tyagi A, Kolluru V, Chandrasekaran B, Saran U, Sharma AK, Ankem MK, Damodaran C. ASR488, a novel small molecule, activates an mRNA binding protein, CPEB1, and inhibits the growth of bladder cancer. Oncol Lett 2020; 20:850-860. [PMID: 32566012 PMCID: PMC7285857 DOI: 10.3892/ol.2020.11593] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Accepted: 03/02/2020] [Indexed: 12/03/2022] Open
Abstract
Due to a lack of mechanistic insights, muscle-invasive bladder cancer (MIBC) remains incurable and is one of the most lethal types of cancer in the United States. The present study investigated changes in the molecular signatures of MIBC cells (TCCSUP and HT1376) after treatment with a novel small molecule, ASR488, to gain knowledge of the mechanisms that inhibited MIBC cell growth. ASR488 treatment initiated apoptotic signaling in MIBC cells. Pathway enrichment analysis was used to analyze the changes in function of differentially expressed genes. Gene Ontology analysis, as well as Kyoto Encyclopedia of Genes and Genomes analysis, was also performed. These analyses along with reactome pathway enrichment analyses indicated that the genes upregulated in the ASR488-treated cells are involved in focal adhesion, neurotrophin signaling, p53 signaling, endoplasmic reticulum functioning in terms of protein processing, and pathways related to bladder cancer. The genes downregulated in ASR488-treated MIBC cells were mainly involved in DNA replication, mismatch repair, RNA degradation, nucleotide excision repair and TGFβ signaling (P<0.05). Furthermore, reverse transcription-quantitative PCR analysis revealed an increase in transcripts of the most upregulated genes in ASR 488-treated MIBC cells: CPEB1 (36-fold), IL11 (30-fold), SFN (20.12-fold) and CYP4F11 (15.8-fold). In conclusion, the analysis of biological functions of the most differentially expressed genes revealed possible mechanisms that may be associated with the aggressiveness of MIBC.
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Affiliation(s)
- Ashish Tyagi
- Department of Urology, University of Louisville, Louisville, KY 40202, USA
| | - Venkatesh Kolluru
- Department of Urology, University of Louisville, Louisville, KY 40202, USA
| | | | - Uttara Saran
- Department of Urology, University of Louisville, Louisville, KY 40202, USA
| | - Arun K Sharma
- Department of Pharmacology, Penn State Cancer Institute, Penn State College of Medicine, Hershey, PA 17033, USA
| | - Murali K Ankem
- Department of Urology, University of Louisville, Louisville, KY 40202, USA
| | - Chendil Damodaran
- Department of Urology, University of Louisville, Louisville, KY 40202, USA
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Wang Y, Yang J, Chen P, Song Y, An W, Zhang H, Butegeleqi B, Yan J. MicroRNA-320a inhibits invasion and metastasis in osteosarcoma by targeting cytoplasmic polyadenylation element-binding protein 1. Cancer Med 2020; 9:2833-2845. [PMID: 32064777 PMCID: PMC7163091 DOI: 10.1002/cam4.2919] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Revised: 01/07/2020] [Accepted: 01/26/2020] [Indexed: 02/06/2023] Open
Abstract
Osteosarcoma is a primary malignant bone tumor, which affects children, adolescents, and young adults commonly. MicroRNAs (miRNAs) have been proved to be dysregulated in different cancers, including osteosarcoma. Although miR‐320a has been implicated in many types of malignancies, little is known about the role of miR‐320a in osteosarcoma. In this study, we show that the overexpression of miR‐320a or knockdown of cytoplasmic polyadenylation element‐binding protein 1 (CPEB1) inhibited osteosarcoma cell migration and invasion. miR‐320a downregulates CPEB1 expression by directly targeting the CPEB1 3′‐UTR. Furthermore, CPEB1 reintroduction reversed the antiproliferation, antimigration, and antiinvasion roles of miR‐320a, indicating that miR‐320a might function as a tumor suppressor in osteosarcoma through CPEB1. In conclusion, our study demonstrates that miR‐320a plays a critical role in osteosarcoma progression and may provide a potential therapeutic target for osteosarcoma.
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Affiliation(s)
- Yanlong Wang
- Departments of Orthopedic Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, P.R. China
| | - Jiyu Yang
- Departments of Orthopedic Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, P.R. China
| | - Pangtao Chen
- Departments of Orthopedic Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, P.R. China
| | - Yu Song
- Departments of Orthopedic Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, P.R. China
| | - Weizheng An
- Departments of Orthopedic Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, P.R. China
| | - Haoran Zhang
- Departments of Orthopedic Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, P.R. China
| | - Butegeleqi Butegeleqi
- Departments of Orthopedic Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, P.R. China
| | - Jinglong Yan
- Departments of Orthopedic Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, P.R. China
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Cataloguing and Selection of mRNAs Localized to Dendrites in Neurons and Regulated by RNA-Binding Proteins in RNA Granules. Biomolecules 2020; 10:biom10020167. [PMID: 31978946 PMCID: PMC7072219 DOI: 10.3390/biom10020167] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Revised: 01/18/2020] [Accepted: 01/20/2020] [Indexed: 12/15/2022] Open
Abstract
Spatiotemporal translational regulation plays a key role in determining cell fate and function. Specifically, in neurons, local translation in dendrites is essential for synaptic plasticity and long-term memory formation. To achieve local translation, RNA-binding proteins in RNA granules regulate target mRNA stability, localization, and translation. To date, mRNAs localized to dendrites have been identified by comprehensive analyses. In addition, mRNAs associated with and regulated by RNA-binding proteins have been identified using various methods in many studies. However, the results obtained from these numerous studies have not been compiled together. In this review, we have catalogued mRNAs that are localized to dendrites and are associated with and regulated by the RNA-binding proteins fragile X mental retardation protein (FMRP), RNA granule protein 105 (RNG105, also known as Caprin1), Ras-GAP SH3 domain binding protein (G3BP), cytoplasmic polyadenylation element binding protein 1 (CPEB1), and staufen double-stranded RNA binding proteins 1 and 2 (Stau1 and Stau2) in RNA granules. This review provides comprehensive information on dendritic mRNAs, the neuronal functions of mRNA-encoded proteins, the association of dendritic mRNAs with RNA-binding proteins in RNA granules, and the effects of RNA-binding proteins on mRNA regulation. These findings provide insights into the mechanistic basis of protein-synthesis-dependent synaptic plasticity and memory formation and contribute to future efforts to understand the physiological implications of local regulation of dendritic mRNAs in neurons.
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Zhang J, Deng Y, Zuo Y, Wang J, Zhao Y. Analysis of Colorectal Cancer-Associated Alternative Splicing Based on Transcriptome. DNA Cell Biol 2020; 39:16-24. [PMID: 31808724 DOI: 10.1089/dna.2019.5111] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Affiliation(s)
- Jiting Zhang
- Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, P.R. China
| | - Yulan Deng
- Department of Thoracic Surgery, West China Hospital, Sichuan University, Chengdu, P.R. China
| | - Yuanli Zuo
- Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, P.R. China
| | - Jin Wang
- State/National Key Laboratory of Biotherapy, Sichuan University, Chengdu, P.R. China
| | - Yun Zhao
- Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, P.R. China
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Pant D, Narayanan SP, Vijay N, Shukla S. Hypoxia-induced changes in intragenic DNA methylation correlate with alternative splicing in breast cancer. J Biosci 2020; 45:3. [PMID: 31965981 PMCID: PMC7117958] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2023]
Abstract
The tumor microenvironment is marked by gradients in the level of oxygen and nutrients, with oxygen levels reaching a minimum at the core of the tumor, a condition known as tumor hypoxia. Mediated by members of the HIF family of transcription factors, hypoxia leads to a more aggressive tumor phenotype by transactivation of several genes as well as reprogramming of pre-mRNA splicing. Intragenic DNA methylation, which is known to affect alternative splicing in cancer, could be one of several reasons behind the changes in splicing patterns under hypoxia. Here, we have tried to establish a correlation between intragenicDNA methylation and alternative usage of exons in tumor hypoxia. First, we have generated a customhypoxia signature consisting of 34 genes that are upregulated under hypoxia and are direct targets of HIF-1α. Using this gene expression signature, we have successfully stratified publicly available breast cancer patient samples into hypoxia positive and hypoxia negative groups followed by mining of differentially spliced isoforms between these groups. The Hypoxia Hallmark signature from MSigDB was also used independently to stratify the same tumor samples into hypoxic and normoxic.We found that 821 genes were showing differential splicing between samples stratified using a custom signature, whereas, 911 genes were showing differential splicing between samples stratified using the MSigDB signature. Finally, we performed multiple correlation tests between the methylation levels (β) of microarray probes located within 1 kilo base pairs of isoform-specific exons using those exons' expression levels in the same patient samples in which the methylation level was recorded. We found that the expression level of one of the exons ofDHX32 and BICD2 significantly correlated with the methylation levels, and we were also able to predict patient survival (p-value: 0.02 for DHX32 and 0.0024 for BICD2). Our findings provide new insights into the potential functional role of intragenic DNA methylation in modulating alternative splicing during hypoxia.
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Affiliation(s)
- Deepak Pant
- Department of Biological Sciences, Indian Institute of Science Education and Research Bhopal, Bhopal 462 066, India
| | - Sathiya Pandi Narayanan
- Department of Biological Sciences, Indian Institute of Science Education and Research Bhopal, Bhopal 462 066, India
| | - Nagarjun Vijay
- Department of Biological Sciences, Indian Institute of Science Education and Research Bhopal, Bhopal 462 066, India
| | - Sanjeev Shukla
- Department of Biological Sciences, Indian Institute of Science Education and Research Bhopal, Bhopal 462 066, India
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Xu K, Ren G, Yin D, Guo S, Zhao Y. Depletion of CPEB1 protects against oxidized LDL-induced endothelial apoptosis and inflammation though SIRT1/LOX-1 signalling pathway. Life Sci 2019; 239:116874. [PMID: 31521690 DOI: 10.1016/j.lfs.2019.116874] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Revised: 09/06/2019] [Accepted: 09/11/2019] [Indexed: 12/26/2022]
Abstract
Atherosclerosis (AS) is a chronic inflammatory disease that results from Oxidized low-density lipoprotein (Ox-LDL) induced endothelial dysfunction. Cytoplasmic polyadenylation element binding protein 1 (CPEB1) is closely related to the development of epithelial cells, but the role of CPEB1 in AS remains unknown. The RNA and protein levels of CPEB1 expression are increased by Ox-LDL exposure, which is abrogated by c-Jun amino-terminal kinase (JNK) inhibitor SP600125. CPEB1 small interfering RNA (siRNA) suppressed the oxidative stress, inflammation, and apoptosis. Furthermore, CPEB1 siRNA enhanced the sirtuin 1 (SIRT1) transcription levels in Ox-LDL-treated HUVECs. Co-Immunoprecipitation (Co-IP) assay showed that CPEB1 siRNA declined the ubiquitination of SIRT1, and SIRT1 siRNA enhanced the Lectin-like oxidized low-density lipoprotein receptor-1 (LOX-1), which were decreased by CPEB1 siRNA. In addition, LOX-1 and SIRT1 attenuated the protection of SIRT1 siRNA on Ox-LDL-induced oxidative stress. Therefore, our study revealed that CPEB1 depletion might play an anti-inflammatory and antiapoptotic role in Ox-LDL-induced apoptosis and inflammation though SIRT1/LOX-1 signalling pathway.
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Affiliation(s)
- Kaicheng Xu
- Department of Anesthesiology, China-Japan Union Hospital JiLin University, Chang Chun, JiLin, 130033, China
| | - Guanghao Ren
- Department of Vascular Surgery, China-Japan Union Hospital JiLin University, Chang Chun, JiLin, 130033, China
| | - Dexin Yin
- Department of Vascular Surgery, China-Japan Union Hospital JiLin University, Chang Chun, JiLin, 130033, China
| | - Suli Guo
- Department of Vascular Surgery, China-Japan Union Hospital JiLin University, Chang Chun, JiLin, 130033, China
| | - Yue Zhao
- Department of Vascular Surgery, China-Japan Union Hospital JiLin University, Chang Chun, JiLin, 130033, China.
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Li CJ, Chu PY, Yiang GT, Wu MY. The Molecular Mechanism of Epithelial-Mesenchymal Transition for Breast Carcinogenesis. Biomolecules 2019; 9:biom9090476. [PMID: 31514467 PMCID: PMC6770718 DOI: 10.3390/biom9090476] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Revised: 09/09/2019] [Accepted: 09/09/2019] [Indexed: 12/23/2022] Open
Abstract
The transforming growth factor-β (TGF-β) signaling pathway plays multiple regulatory roles in the tumorigenesis and development of cancer. TGF-β can inhibit the growth and proliferation of epithelial cells and induce apoptosis, thereby playing a role in inhibiting breast cancer. Therefore, the loss of response in epithelial cells that leads to the inhibition of cell proliferation due to TGF-β is a landmark event in tumorigenesis. As tumors progress, TGF-β can promote tumor cell invasion, metastasis, and drug resistance. At present, the above-mentioned role of TGF-β is related to the interaction of multiple signaling pathways in the cell, which can attenuate or abolish the inhibition of proliferation and apoptosis-promoting effects of TGF-β and enhance its promotion of tumor progression. This article focuses on the molecular mechanisms through which TGF-β interacts with multiple intracellular signaling pathways in tumor progression and the effects of these interactions on tumorigenesis.
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Affiliation(s)
- Chia-Jung Li
- Department of Obstetrics and Gynecology, Kaohsiung Veterans General Hospital, Kaohsiung 813, Taiwan
- Institute of Biomedical Sciences, National Sun Yat-Sen University, Kaohsiung 804, Taiwan
| | - Pei-Yi Chu
- School of Medicine, College of Medicine, Fu Jen Catholic University, New Taipei 242, Taiwan
- Department of Pathology, Show Chwan Memorial Hospital, Changhua 500, Taiwan
- Department of Health Food, Chung Chou University of Science and Technology, Changhua 510, Taiwan
| | - Giou-Teng Yiang
- Department of Emergency Medicine, Taipei Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, New Taipei 231, Taiwan
- Department of Emergency Medicine, School of Medicine, Tzu Chi University, Hualien 970, Taiwan
| | - Meng-Yu Wu
- Department of Emergency Medicine, Taipei Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, New Taipei 231, Taiwan.
- Department of Emergency Medicine, School of Medicine, Tzu Chi University, Hualien 970, Taiwan.
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Li L, Lan J, Ye Y, Yang B, Yang X, Cai Z. CPEB1 Expression Correlates with Severity of Posttraumatic Ankle Osteoarthritis and Aggravates Catabolic Effect of IL-1β on Chondrocytes. Inflammation 2019; 42:628-636. [PMID: 30411210 DOI: 10.1007/s10753-018-0920-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Most cases of posttraumatic ankle osteoarthritis (PTAOA) represent a sequela of ankle fractures. The cytoplasmic polyadenylation element-binding protein 1 (CPEB1) is an RNA binding protein that controls protein expression. Here, we report the previously unappreciated association of CPEB1 with PTAOA. We found that CPEB1 was upregulated in articular cartilage from patients with PTAOA. Additionally, its expression level positively correlated with disease severity. In human primary chondrocytes cultured in vitro, CPEB1 was upregulated when treated with pro-inflammatory cytokines, i.e., IL-1β and TNF-α, suggesting that the observed CPEB1 upregulation in articular cartilage of PTAOA patients may be attributed to local inflammatory milieu. Functionally, CPEB1 overexpression aggravated the catabolic effect of IL-1β on chondrocytes in vitro, and vice versa, its knockdown reduced this effect, together implying a detrimental role of CPEB1 involved in OA progression. In sum, our study identifies CPEB1 as a potential regulator of disease progression of PTAOA.
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Affiliation(s)
- Lei Li
- Department of Orthopaedics, Suining Central Hospital, No. 27 Dongping North Road, Hedong New District, Suining, 629000, Sichuan, China.
| | - Jiaping Lan
- Department of Orthopaedics, Suining Central Hospital, No. 27 Dongping North Road, Hedong New District, Suining, 629000, Sichuan, China
| | - Yongjie Ye
- Department of Orthopaedics, Suining Central Hospital, No. 27 Dongping North Road, Hedong New District, Suining, 629000, Sichuan, China
| | - Bo Yang
- Department of Orthopaedics, Suining Central Hospital, No. 27 Dongping North Road, Hedong New District, Suining, 629000, Sichuan, China
| | - Xiaoyong Yang
- Kunming General Hospital of Chinese PLA, Trauma Orthopedic Institute of Chinese PLA, Kunming, 650032, Yunnan, China
| | - Zhijun Cai
- Kunming General Hospital of Chinese PLA, Trauma Orthopedic Institute of Chinese PLA, Kunming, 650032, Yunnan, China
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Mohibi S, Chen X, Zhang J. Cancer the'RBP'eutics-RNA-binding proteins as therapeutic targets for cancer. Pharmacol Ther 2019; 203:107390. [PMID: 31302171 DOI: 10.1016/j.pharmthera.2019.07.001] [Citation(s) in RCA: 112] [Impact Index Per Article: 22.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Accepted: 07/02/2019] [Indexed: 12/11/2022]
Abstract
RNA-binding proteins (RBPs) play a critical role in the regulation of various RNA processes, including splicing, cleavage and polyadenylation, transport, translation and degradation of coding RNAs, non-coding RNAs and microRNAs. Recent studies indicate that RBPs not only play an instrumental role in normal cellular processes but have also emerged as major players in the development and spread of cancer. Herein, we review the current knowledge about RNA binding proteins and their role in tumorigenesis as well as the potential to target RBPs for cancer therapeutics.
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Affiliation(s)
- Shakur Mohibi
- Comparative Oncology Laboratory, Schools of Veterinary Medicine and Medicine, University of California at Davis, United States
| | - Xinbin Chen
- Comparative Oncology Laboratory, Schools of Veterinary Medicine and Medicine, University of California at Davis, United States
| | - Jin Zhang
- Comparative Oncology Laboratory, Schools of Veterinary Medicine and Medicine, University of California at Davis, United States.
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Tumor suppressor role of cytoplasmic polyadenylation element binding protein 2 (CPEB2) in human mammary epithelial cells. BMC Cancer 2019; 19:561. [PMID: 31185986 PMCID: PMC6558855 DOI: 10.1186/s12885-019-5771-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Accepted: 05/29/2019] [Indexed: 11/10/2022] Open
Abstract
Background Over-expression of cyclooxygenase (COX)-2 promotes breast cancer progression by multiple mechanisms, including induction of stem-like cells (SLC). Combined gene expression and microRNA microarray analyses of empty vector vs COX-2- transfected COX-2 low MCF7 breast cancer cell line identified two COX-2-upregulated microRNAs, miR-526b and miR-655, both found to be oncogenic and SLC-promoting. Cytoplasmic Polyadenylation Element-Binding Protein 2 (CPEB2) was the single common target of both microRNAs, the functions of which remain controversial. CPEB2 has multiple isoforms (A-F), and paradoxically, a high B/A ratio was reported to impart anoikis-resistance and metastatic phenotype in triple- negative breast cancer cells. We tested whether CPEB2 is a tumor suppressor in mammary epithelial cells. Methods We knocked-out CPEB2 in the non-tumorigenic mammary epithelial cell line MCF10A by CRISPR/Cas9-double nickase approach, and knocked-down CPEB2 with siRNAs in the poorly malignant MCF7 cell line, both lines being high CPEB2-expressing. The resultant phenotypes for oncogenity were tested in vitro for both lines and in vivo for CPEB2KO cells. Finally, CPEB2 expression was compared between human breast cancer and non-tumor breast tissues. Results CPEB2 (isoform A) expression was inversely correlated with COX-2 or the above microRNAs in COX-2-divergent breast cancer cell lines. CPEB2KO MCF10A cells exhibited oncogenic properties including increased proliferation, migration, invasion, EMT (decreased E-Cadherin, increased Vimentin, N-Cadherin, SNAI1, and ZEB1) and SLC phenotype (increased tumorsphere formation and SLC marker-expression). Tumor-suppressor p53 protein was shown to be a novel translationally-regulated target of CPEB2, validated with polysome profiling. CPEB2KO, but not wild-type cells produced lung colonies upon intravenous injection and subcutaneous tumors and spontaneous lung metastases upon implantation at mammary sites in NOD/SCID/IL2Rϒ-null mice, identified with HLA immunostaining. Similarly, siRNA-mediated CPEB2 knockdown in MCF7 cells promoted oncogenic properties in vitro. Human breast cancer tissues (n = 105) revealed a lower mRNA expression for CPEB2 isoform A and also a lower A/B isoform ratio than in non-tumour breast tissues (n = 20), suggesting that CPEB2A accounts for the tumor-suppressor functions of CPEB2. Conclusions CPEB2, presumably the isoform A, plays a key role in suppressing tumorigenesis in mammary epithelial cells by repressing EMT, migration, invasion, proliferation and SLC phenotype, via multiple targets, including a newly-identified translational target p53. Electronic supplementary material The online version of this article (10.1186/s12885-019-5771-5) contains supplementary material, which is available to authorized users.
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Aiello NM, Kang Y. Context-dependent EMT programs in cancer metastasis. J Exp Med 2019; 216:1016-1026. [PMID: 30975895 PMCID: PMC6504222 DOI: 10.1084/jem.20181827] [Citation(s) in RCA: 352] [Impact Index Per Article: 70.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Revised: 03/22/2019] [Accepted: 03/22/2019] [Indexed: 12/12/2022] Open
Abstract
Epithelial-mesenchymal transition (EMT) is a developmental process whereby stationary, adherent cells acquire the ability to migrate. EMT is critical for dramatic cellular movements during embryogenesis; however, tumor cells can reactivate EMT programs, which increases their aggressiveness. In addition to motility, EMT is associated with enhanced stem cell properties and drug resistance; thus it can drive metastasis, tumor recurrence, and therapy resistance in the context of cancer. However, the precise requirements for EMT in metastasis have not been fully delineated, with different tumor types relying on discrete EMT effectors. Most tumor cells do not undergo a full EMT, but rather adopt some qualities of mesenchymal cells and maintain some epithelial characteristics. Emerging evidence suggests that partial EMT can drive distinct migratory properties and enhance the epithelial-mesenchymal plasticity of cancer cells as well as cell fate plasticity. This review discusses the diverse regulatory mechanisms and functional consequences of EMT, with an emphasis on the importance of partial EMT.
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Affiliation(s)
- Nicole M Aiello
- Department of Molecular Biology, Princeton University, Princeton, NJ
| | - Yibin Kang
- Department of Molecular Biology, Princeton University, Princeton, NJ
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48
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Ivanova IG, Park CV, Kenneth NS. Translating the Hypoxic Response-the Role of HIF Protein Translation in the Cellular Response to Low Oxygen. Cells 2019; 8:cells8020114. [PMID: 30717305 PMCID: PMC6406544 DOI: 10.3390/cells8020114] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Revised: 01/29/2019] [Accepted: 01/30/2019] [Indexed: 12/11/2022] Open
Abstract
Hypoxia-Inducible Factors (HIFs) play essential roles in the physiological response to low oxygen in all multicellular organisms, while their deregulation is associated with human diseases. HIF levels and activity are primarily controlled by the availability of the oxygen-sensitive HIFα subunits, which is mediated by rapid alterations to the rates of HIFα protein production and degradation. While the pathways that control HIFα degradation are understood in great detail, much less is known about the targeted control of HIFα protein synthesis and what role this has in controlling HIF activity during the hypoxic response. This review will focus on the signalling pathways and RNA binding proteins that modulate HIFα mRNA half-life and/or translation rate, and their contribution to hypoxia-associated diseases.
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Affiliation(s)
- Iglika G Ivanova
- Institute for Cell and Molecular Biosciences, Faculty of Medical Sciences, Newcastle University, Newcastle upon Tyne, NE2 4HH, UK.
| | - Catherine V Park
- Institute for Cell and Molecular Biosciences, Faculty of Medical Sciences, Newcastle University, Newcastle upon Tyne, NE2 4HH, UK.
| | - Niall S Kenneth
- Institute for Cell and Molecular Biosciences, Faculty of Medical Sciences, Newcastle University, Newcastle upon Tyne, NE2 4HH, UK.
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49
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Xu M, Fang S, Song J, Chen M, Zhang Q, Weng Q, Fan X, Chen W, Wu X, Wu F, Tu J, Zhao Z, Ji J. CPEB1 mediates hepatocellular carcinoma cancer stemness and chemoresistance. Cell Death Dis 2018; 9:957. [PMID: 30237545 PMCID: PMC6148052 DOI: 10.1038/s41419-018-0974-2] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2018] [Revised: 08/01/2018] [Accepted: 08/20/2018] [Indexed: 12/13/2022]
Abstract
Cancer stem cells (CSCs) are a subpopulation of cells within tumors that are believed to possess pluripotent properties and thought to be responsible for tumor initiation, progression, relapse and metastasis. Cytoplasmic polyadenylation element-binding protein 1 (CPEB1), a sequence-specific RNA-binding protein that regulates mRNA polyadenylation and translation, has been linked to cancer progression and metastasis. However, the involvement of CPEB1 in hepatocellular carcinoma (HCC) remains unclear. In this study, we have demonstrated that CPEB1 directly regulates sirtuin 1 (SIRT1) mRNA to mediate cancer stemness in HCC. Cancer stemness was analyzed by self-renewal ability, chemoresistance, metastasis, expression of stemness-related genes and CSC marker-positive cell populations. The results indicate that CPEB1 is downregulated in HCC. Overexpression of CPEB1 dramatically reduced HCC cell stemness, whereas silencing CPEB1 enhances it. Using site-directed mutagenesis, a luciferase reporter assay, and immunoprecipitation, we found that CPEB1 could directly target the 3′-UTR of SIRT1, control poly(A) tail length and suppress its translation to mediate cancer stemness in vitro and in vivo. Overall, our findings suggest that the negative regulation between CPEB1 and SIRT1 contributes to the suppression of cancer stemness in HCC. CPEB1 may have potential as a therapeutic target in HCC.
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Affiliation(s)
- Min Xu
- Key Laboratory of Imaging Diagnosis and Minimally Invasive Intervention Research, The Fifth Affiliated Hospital of Wenzhou Medical University, 323000, Lishui, China.,Department of Radiology, Affiliated Lishui Hospital of Zhejiang University, 323000, Lishui, China
| | - Shiji Fang
- Key Laboratory of Imaging Diagnosis and Minimally Invasive Intervention Research, The Fifth Affiliated Hospital of Wenzhou Medical University, 323000, Lishui, China.,Department of Radiology, Affiliated Lishui Hospital of Zhejiang University, 323000, Lishui, China
| | - Jingjing Song
- Key Laboratory of Imaging Diagnosis and Minimally Invasive Intervention Research, The Fifth Affiliated Hospital of Wenzhou Medical University, 323000, Lishui, China.,Department of Radiology, Affiliated Lishui Hospital of Zhejiang University, 323000, Lishui, China
| | - Minjiang Chen
- Key Laboratory of Imaging Diagnosis and Minimally Invasive Intervention Research, The Fifth Affiliated Hospital of Wenzhou Medical University, 323000, Lishui, China.,Department of Radiology, Affiliated Lishui Hospital of Zhejiang University, 323000, Lishui, China
| | - Qianqian Zhang
- Key Laboratory of Imaging Diagnosis and Minimally Invasive Intervention Research, The Fifth Affiliated Hospital of Wenzhou Medical University, 323000, Lishui, China.,Department of Radiology, Affiliated Lishui Hospital of Zhejiang University, 323000, Lishui, China
| | - Qiaoyou Weng
- Key Laboratory of Imaging Diagnosis and Minimally Invasive Intervention Research, The Fifth Affiliated Hospital of Wenzhou Medical University, 323000, Lishui, China.,Department of Radiology, Affiliated Lishui Hospital of Zhejiang University, 323000, Lishui, China
| | - Xiaoxi Fan
- Key Laboratory of Imaging Diagnosis and Minimally Invasive Intervention Research, The Fifth Affiliated Hospital of Wenzhou Medical University, 323000, Lishui, China.,Department of Radiology, Affiliated Lishui Hospital of Zhejiang University, 323000, Lishui, China
| | - Weiqian Chen
- Key Laboratory of Imaging Diagnosis and Minimally Invasive Intervention Research, The Fifth Affiliated Hospital of Wenzhou Medical University, 323000, Lishui, China.,Department of Radiology, Affiliated Lishui Hospital of Zhejiang University, 323000, Lishui, China
| | - Xulu Wu
- Key Laboratory of Imaging Diagnosis and Minimally Invasive Intervention Research, The Fifth Affiliated Hospital of Wenzhou Medical University, 323000, Lishui, China.,Department of Radiology, Affiliated Lishui Hospital of Zhejiang University, 323000, Lishui, China
| | - Fazong Wu
- Key Laboratory of Imaging Diagnosis and Minimally Invasive Intervention Research, The Fifth Affiliated Hospital of Wenzhou Medical University, 323000, Lishui, China.,Department of Radiology, Affiliated Lishui Hospital of Zhejiang University, 323000, Lishui, China
| | - Jianfei Tu
- Key Laboratory of Imaging Diagnosis and Minimally Invasive Intervention Research, The Fifth Affiliated Hospital of Wenzhou Medical University, 323000, Lishui, China.,Department of Radiology, Affiliated Lishui Hospital of Zhejiang University, 323000, Lishui, China
| | - Zhongwei Zhao
- Key Laboratory of Imaging Diagnosis and Minimally Invasive Intervention Research, The Fifth Affiliated Hospital of Wenzhou Medical University, 323000, Lishui, China. .,Department of Radiology, Affiliated Lishui Hospital of Zhejiang University, 323000, Lishui, China.
| | - Jiansong Ji
- Key Laboratory of Imaging Diagnosis and Minimally Invasive Intervention Research, The Fifth Affiliated Hospital of Wenzhou Medical University, 323000, Lishui, China. .,Department of Radiology, Affiliated Lishui Hospital of Zhejiang University, 323000, Lishui, China.
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50
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Hui X, Zhang S, Wang Y. miR‑454‑3p suppresses cell migration and invasion by targeting CPEB1 in human glioblastoma. Mol Med Rep 2018; 18:3965-3972. [PMID: 30106109 DOI: 10.3892/mmr.2018.9386] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Accepted: 06/28/2018] [Indexed: 11/05/2022] Open
Abstract
MicroRNAs (miRNA/miRs) serve crucial roles in the progression of human glioblastoma (GBM); however, the exact regulatory mechanisms of miRNAs in human GBM remain unclear. The present study aimed to investigate the roles of miR‑454‑3p in human GBM. Reverse transcription‑quantitative polymerase chain reaction (RT‑qPCR) analysis was performed to examine the expression of miR‑454‑3p in glioma tissues and adjacent tissues. Human GBM cell lines (LN‑229, A172 and GL15) and a normal human astrocyte cells (HA1800) were used for analysis. In addition, RT‑qPCR and western blotting were applied for mRNA and protein expression analysis, respectively. The cell proliferation was measured using a Cell Counting kit‑8 assay. Furthermore, scratch and Transwell assays were employed for the analysis of cell migration and invasion. A luciferase reporter assay was used to verify the target of miR‑454‑3p. The results revealed that miR‑454‑3p was downregulated in the glioma tissues and GBM cell lines, including LN‑229, A172 and GL15. Additionally, the overexpression of miR‑454‑3p significantly suppressed the proliferation, migration and invasion of LN‑229 cells. Furthermore, cytoplasmic polyadenylation element‑binding protein 1 (CPEB1) was confirmed as a direct target of miR‑454‑3p. These findings indicated that the overexpression of miR‑454‑3p inhibited cell proliferation, migration and invasion by downregulating CPEB1. Therefore, miR‑454‑3p may act as a tumor suppressor and represent an effective therapeutic strategy in GBM.
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Affiliation(s)
- Xiaobo Hui
- Department of Neurosurgery, Huai'an First People's Hospital, Nanjing Medical University, Huai'an, Jiangsu 223300, P.R. China
| | - Shiming Zhang
- Department of Neurosurgery, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215006, P.R. China
| | - Yanping Wang
- Department of Neurosurgery, Huai'an First People's Hospital, Nanjing Medical University, Huai'an, Jiangsu 223300, P.R. China
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