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Shafieizadeh Z, Shafieizadeh Z, Davoudi M, Afrisham R, Miao X. Role of Fibrinogen-like Protein 1 in Tumor Recurrence Following Hepatectomy. J Clin Transl Hepatol 2024; 12:406-415. [PMID: 38638375 PMCID: PMC11022061 DOI: 10.14218/jcth.2023.00397] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 11/29/2023] [Accepted: 01/25/2024] [Indexed: 04/20/2024] Open
Abstract
Partial hepatectomy is a first-line treatment for hepatocellular carcinoma. Within 2 weeks following partial hepatectomy, specific molecular pathways are activated to promote liver regeneration. Nevertheless, residual microtumors may also exploit these pathways to reappear and metastasize. Therapeutically targeting molecules that are differentially regulated between normal cells and malignancies, such as fibrinogen-like protein 1 (FGL1), appears to be an effective approach. The potential functions of FGL1 in both regenerative and malignant cells are discussed within the ambit of this review. While FGL1 is normally elevated in regenerative hepatocytes, it is normally downregulated in malignant cells. Hepatectomy does indeed upregulate FGL1 by increasing the release of transcription factors that promote FGL1, including HNF-1α and STAT3, and inflammatory effectors, such as TGF-β and IL6. This, in turn, stimulates certain proliferative pathways, including EGFR/Src/ERK. Hepatectomy alters the phase transition of highly differentiated hepatocytes from G0 to G1, thereby transforming susceptible cells into cancerous ones. Activation of the PI3K/Akt/mTOR pathway by FGL1 allele loss on chromosome 8, a tumor suppressor area, may also cause hepatocellular carcinoma. Interestingly, FGL1 is specifically expressed in the liver via HNF-1α histone acetylase activity, which triggers lipid metabolic reprogramming in malignancies. FGL1 might also be involved in other carcinogenesis processes such as hypoxia, epithelial-mesenchymal transition, immunosuppression, and sorafenib-mediated drug resistance. This study highlights a research gap in these disciplines and the necessity for additional research on FGL1 function in the described processes.
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Affiliation(s)
- Zahra Shafieizadeh
- Department of Medical Laboratory Sciences, School of Allied Medical Sciences, Tehran University of Medical Sciences, Tehran, Iran
| | - Zohreh Shafieizadeh
- Department of Medical Laboratory Sciences, School of Allied Medical Sciences, Tehran University of Medical Sciences, Tehran, Iran
| | - Maryam Davoudi
- Department of Medical Laboratory Sciences, School of Allied Medical Sciences, Tehran University of Medical Sciences, Tehran, Iran
| | - Reza Afrisham
- Department of Medical Laboratory Sciences, School of Allied Medical Sciences, Tehran University of Medical Sciences, Tehran, Iran
| | - Xiaolei Miao
- School of Pharmacy, Xianning Medical College, Hubei University of Science and Technology, Xianning, Hubei, China
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2
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Park H, Jee S, Son H, Cha H, Bang S, Ahn BK, Myung J, Paik S, Kim H. Low MTUS1 Protein Expression Is Associated with Poor Survival in Patients with Colorectal Adenocarcinoma. Diagnostics (Basel) 2023; 13:1140. [PMID: 36980447 PMCID: PMC10047814 DOI: 10.3390/diagnostics13061140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Revised: 03/14/2023] [Accepted: 03/14/2023] [Indexed: 03/19/2023] Open
Abstract
Introduction: Microtubule-associated tumor suppressor 1 (MTUS1) is a novel tumor suppressor protein involved in cell proliferation, migration, and tumor growth. MTUS1 is thought to be downregulated in various human cancers and associated with poor prognosis. We evaluated the clinicopathologic significance and prognostic value of MTUS1 in colorectal adenocarcinoma. Methods: Immunohistochemical staining for MTUS1 was performed on tissue microarrays of 393 colorectal adenocarcinoma cases, and MTUS1 staining was classified into high- and low-expression groups. Then, we investigated the correlations between MTUS1 protein expression and various clinicopathological parameters and patient survival. Results: MTUS1 protein was expressed at various grade levels in the cytoplasm of tumor cells, which showed loss or decreased expression of MTUS1. A total of 253 cases (64.4%) were classified into the low MTUS1 protein expression group and 140 cases (35.6%) into the high MTUS1 expression group. A low level of MTUS1 protein significantly correlated with tumor size (p = 0.047), histological grade (p < 0.001), lymphovascular invasion (p < 0.001), perineural invasion (p = 0.047), and lymph node metastasis (p < 0.001). Survival analyses showed that patients with low MTUS1 protein expression had worse overall survival (p = 0.007, log-rank test) and worse recurrence-free survival (p = 0.019, log-rank test) than those with high MTUS1 expression. Conclusions: Low MTUS1 protein expression is associated with adverse clinicopathological characteristics and poor survival outcomes in patients with colorectal adenocarcinoma. These results suggest that MTUS1 functions as a tumor suppressor in colorectal adenocarcinoma and could be a potential prognostic biomarker.
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Liu XH, Qi LW, Alolga RN, Liu Q. Implication of the hepatokine, fibrinogen-like protein 1 in liver diseases, metabolic disorders and cancer: The need to harness its full potential. Int J Biol Sci 2022; 18:292-300. [PMID: 34975333 PMCID: PMC8692158 DOI: 10.7150/ijbs.66834] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Accepted: 10/24/2021] [Indexed: 12/17/2022] Open
Abstract
Fibrinogen-like protein 1 (FGL1) is a novel hepatokine that forms part of the fibrinogen superfamily. It is predominantly expressed in the liver under normal physiological conditions. When the liver is injured by external factors, such as chemical drugs and radiation, FGL1 acts as a protective factor to promote the growth of regenerated cells. However, elevated hepatic FGL1 under high fat conditions can cause lipid accumulation and inflammation, which in turn trigger the development of non-alcoholic fatty liver disease, diabetes, and obesity. FGL1 is also involved in the regulation of insulin resistance in adipose tissues and skeletal muscles as a means of communication between the liver and other tissues. In addition, the abnormally changed FGL1 levels in the plasma of cancer patients make it a potential predictor of cancer incidence in clinical practice. FGL1 was recently identified as a major functional ligand of the immune inhibitory receptor, lymphocyte-activation gene 3 (LAG3), thus making it a promising target for cancer immunotherapy except for the classical programmed cell death protein 1/programmed cell death ligand 1 (PD-1/PD-L1) axis. Despite the potential of FGL1 as a new cancer biomarker and therapeutic target, there are few related studies and much of what has been reported are superficial and lack depth and particularity. Therefore, elucidating the role and underlying mechanisms of FGL1 could be crucial for the development of promising diagnostic and therapeutic strategies for related diseases. Here, we provide a comprehensive review of the cellular mechanisms and clinical prospects of FGL1 in the prevention and treatment of liver diseases, metabolic disorders and cancer, and proffer suggestions for future studies.
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Affiliation(s)
- Xi-Hua Liu
- State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 210009, China
| | - Lian-Wen Qi
- Clinical Metabolomics Center, China Pharmaceutical University, Nanjing 211198, China
| | - Raphael N Alolga
- State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 210009, China.,Clinical Metabolomics Center, China Pharmaceutical University, Nanjing 211198, China
| | - Qun Liu
- State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 210009, China
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Kanduc D. From Anti-Severe Acute Respiratory Syndrome Coronavirus 2 Immune Response to Cancer Onset via Molecular Mimicry and Cross-Reactivity. Glob Med Genet 2021; 8:176-182. [PMID: 34877576 PMCID: PMC8635832 DOI: 10.1055/s-0041-1735590] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Accepted: 08/02/2021] [Indexed: 12/11/2022] Open
Abstract
Background and Objectives Whether exposure to severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) may predispose to the risk of cancer in individuals with no prior cancers is a crucial question that remains unclear. To confirm/refute possible relationships between exposure to the virus and ex novo insurgence of tumors, this study analyzed molecular mimicry and the related cross-reactive potential between SARS-CoV-2 spike glycoprotein (gp) antigen and human tumor-suppressor proteins. Materials and Methods Tumor-associated proteins were retrieved from UniProt database and analyzed for pentapeptide sharing with SARS-CoV-2 spike gp by using publicly available databases. Results An impressively high level of molecular mimicry exists between SARS-CoV-2 spike gp and tumor-associated proteins. Numerically, 294 tumor-suppressor proteins share 308 pentapeptides with the viral antigen. Crucially, the shared peptides have a relevant immunologic potential by repeatedly occurring in experimentally validated epitopes. Such immunologic potential is of further relevancy in that most of the shared peptides are also present in infectious pathogens to which, in general, human population has already been exposed, thus indicating the possibility of immunologic imprint phenomena. Conclusion This article described a vast peptide overlap between SARS-CoV-2 spike gp and tumor-suppressor proteins, and supports autoimmune cross-reactivity as a potential mechanism underlying prospective cancer insurgence following exposure to SARS-CoV-2. Clinically, the findings call for close surveillance of tumor sequelae that possibly could result from the current coronavirus pandemic.
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Affiliation(s)
- Darja Kanduc
- Department of Biosciences, Biotechnologies, and Biopharmaceutics, University of Bari, Bari, Italy
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Jakoube P, Cutano V, González-Morena JM, Keckesova Z. Mitochondrial Tumor Suppressors-The Energetic Enemies of Tumor Progression. Cancer Res 2021; 81:4652-4667. [PMID: 34183354 PMCID: PMC9397617 DOI: 10.1158/0008-5472.can-21-0518] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Revised: 06/09/2021] [Accepted: 06/24/2021] [Indexed: 01/07/2023]
Abstract
Tumor suppressors represent a critical line of defense against tumorigenesis. Their mechanisms of action and the pathways they are involved in provide important insights into cancer progression, vulnerabilities, and treatment options. Although nuclear and cytosolic tumor suppressors have been extensively investigated, relatively little is known about tumor suppressors localized within the mitochondria. However, recent research has begun to uncover the roles of these important proteins in suppressing tumorigenesis. Here, we review this newly developing field and summarize available information on mitochondrial tumor suppressors.
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Affiliation(s)
- Pavel Jakoube
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Prague, Czech Republic.,Department of Cell Biology, Faculty of Science, Charles University, Prague, Czech Republic
| | - Valentina Cutano
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Prague, Czech Republic
| | - Juan M. González-Morena
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Prague, Czech Republic
| | - Zuzana Keckesova
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Prague, Czech Republic.,Corresponding Author: Zuzana Keckesova, Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo Namesti 2, Prague 16000, Czech Republic. Phone: 420-2201-83584; E-mail:
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Rozario LT, Sharker T, Nila TA. In silico analysis of deleterious SNPs of human MTUS1 gene and their impacts on subsequent protein structure and function. PLoS One 2021; 16:e0252932. [PMID: 34125870 PMCID: PMC8202925 DOI: 10.1371/journal.pone.0252932] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Accepted: 05/25/2021] [Indexed: 11/30/2022] Open
Abstract
The mitochondrial tumor suppressor 1 (MTUS1) gene acts as a crucial tumor suppressor by inhibiting growth and proliferation of eukaryotic cells including tumor cell lines. Down regulation of MTUS1 gene has been implicated in a wide range of cancers as well as various human diseases. Alteration through nsSNPs can potentially damage the structure and/or function of the protein. As characterization of functional SNPs in such disease linked genes is a major challenge, it is feasible to analyze putative functional SNPs prior to performing larger population studies. Hence, in this in silico study we differentiated the potentially harmful nsSNPs of the MTUS1 gene from the neutral ones by using various sequence and structure based bioinformatic tools. In a total of 215 nsSNPs, 9 were found to be most likely to exert deleterious effect using 7 prediction tools. From which, 5nsSNPs (S1259L, E960K, P503T, L1084V and L1143Q) were selected as potentially damaging due to their presence in the highly conserved region and ability to decrease protein stability. In fact, 2 nsSNPs (S1259L and E960K) among these 5 were found to be individually associated with two distinctive cancers named Stomach adenocarcinoma and Uterine corpus endometrial carcinoma. As this is the first comprehensive study analyzing the functional nsSNPs of MTUS1, the results of the current study would certainly be helpful in future prospects concerning large population-based studies as well as drug discovery, especially developing individualized medicine.
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Affiliation(s)
- Liza Teresa Rozario
- Department of Biochemistry and Molecular Biology, Noakhali Science and Technology University, Noakhali, Bangladesh
- * E-mail:
| | - Tanima Sharker
- Department of Biochemistry and Molecular Biology, Noakhali Science and Technology University, Noakhali, Bangladesh
| | - Tasnin Akter Nila
- Department of Biochemistry and Molecular Biology, University of Dhaka, Dhaka, Bangladesh
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Haykal MM, Rodrigues-Ferreira S, Nahmias C. Microtubule-Associated Protein ATIP3, an Emerging Target for Personalized Medicine in Breast Cancer. Cells 2021; 10:cells10051080. [PMID: 34062782 PMCID: PMC8147298 DOI: 10.3390/cells10051080] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Revised: 04/29/2021] [Accepted: 04/29/2021] [Indexed: 12/17/2022] Open
Abstract
Breast cancer is the leading cause of death by malignancy among women worldwide. Clinical data and molecular characteristics of breast tumors are essential to guide clinician’s therapeutic decisions. In the new era of precision medicine, that aims at personalizing the treatment for each patient, there is urgent need to identify robust companion biomarkers for new targeted therapies. This review focuses on ATIP3, a potent anti-cancer protein encoded by candidate tumor suppressor gene MTUS1, whose expression levels are markedly down-regulated in breast cancer. ATIP3 is a microtubule-associated protein identified both as a prognostic biomarker of patient survival and a predictive biomarker of breast tumors response to taxane-based chemotherapy. We present here recent studies pointing out ATIP3 as an emerging anti-cancer protein and a potential companion biomarker to be combined with future personalized therapy against ATIP3-deficient breast cancer.
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Affiliation(s)
- Maria M. Haykal
- Institut Gustave Roussy, Université Paris-Saclay, Inserm U981, Biomarqueurs Prédictifs et Nouvelles Stratégies Thérapeutiques en Oncologie, 94800 Villejuif, France; (M.M.H.); (S.R.-F.)
- LERMIT Laboratory, 92296 Chatenay-Malabry, France
| | - Sylvie Rodrigues-Ferreira
- Institut Gustave Roussy, Université Paris-Saclay, Inserm U981, Biomarqueurs Prédictifs et Nouvelles Stratégies Thérapeutiques en Oncologie, 94800 Villejuif, France; (M.M.H.); (S.R.-F.)
- LERMIT Laboratory, 92296 Chatenay-Malabry, France
- Inovarion, 75005 Paris, France
| | - Clara Nahmias
- Institut Gustave Roussy, Université Paris-Saclay, Inserm U981, Biomarqueurs Prédictifs et Nouvelles Stratégies Thérapeutiques en Oncologie, 94800 Villejuif, France; (M.M.H.); (S.R.-F.)
- LERMIT Laboratory, 92296 Chatenay-Malabry, France
- Correspondence:
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8
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Zhang J, Li Z, Liu L, Wang Q, Li S, Chen D, Hu Z, Yu T, Ding J, Li J, Yao M, Huang S, Zhao Y, He X. Long noncoding RNA TSLNC8 is a tumor suppressor that inactivates the interleukin-6/STAT3 signaling pathway. Hepatology 2018; 67:171-187. [PMID: 28746790 DOI: 10.1002/hep.29405] [Citation(s) in RCA: 166] [Impact Index Per Article: 27.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/08/2017] [Revised: 06/26/2017] [Accepted: 07/23/2017] [Indexed: 02/06/2023]
Abstract
UNLABELLED Long noncoding RNAs can serve as oncogenes or tumor suppressors in human cancer; however, their biological functions and underlying mechanism in hepatocarcinogenesis are largely unknown. Here, we report a novel tumor suppressor long noncoding RNA on chromosome 8p12 (termed TSLNC8) that is frequently deleted and down-regulated in hepatocellular carcinoma (HCC) tissues. The loss of TSLNC8 is highly associated with the malignant features of HCC and serves as a prognostic indicator for HCC patients. TSLNC8 significantly suppresses the proliferation and metastasis of HCC cells in vitro and in vivo. TSLNC8 exerts its tumor suppressive activity by competitively interacting with transketolase and signal transducer and activator of transcription 3 (STAT3) and modulating the STAT3-Tyr705 and STAT3-Ser727 phosphorylation levels and STAT3 transcriptional activity, thus resulting in inactivation of the interleukin-6-STAT3 signaling pathway in HCC cells. CONCLUSION TSLNC8 is a promising prognostic predictor for patients with HCC, and the TSLNC8-transketolase-STAT3 axis is a potential therapeutic target for HCC treatment. (Hepatology 2018;67:171-187).
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Affiliation(s)
- Jiwei Zhang
- Fudan University Shanghai Cancer Center and Institutes of Biomedical Sciences, Shanghai Medical College, Fudan University, Shanghai, China
| | - Zhe Li
- Fudan University Shanghai Cancer Center and Institutes of Biomedical Sciences, Shanghai Medical College, Fudan University, Shanghai, China
| | - Longzi Liu
- Liver Cancer Institute, Zhongshan Hospital, Shanghai Medical College, Fudan University, Shanghai, China
| | - Qifeng Wang
- Fudan University Shanghai Cancer Center and Institutes of Biomedical Sciences, Shanghai Medical College, Fudan University, Shanghai, China
| | - Shengli Li
- Fudan University Shanghai Cancer Center and Institutes of Biomedical Sciences, Shanghai Medical College, Fudan University, Shanghai, China
| | - Di Chen
- Fudan University Shanghai Cancer Center and Institutes of Biomedical Sciences, Shanghai Medical College, Fudan University, Shanghai, China
| | - Zhixiang Hu
- Fudan University Shanghai Cancer Center and Institutes of Biomedical Sciences, Shanghai Medical College, Fudan University, Shanghai, China
| | - Tao Yu
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Jie Ding
- Fudan University Shanghai Cancer Center and Institutes of Biomedical Sciences, Shanghai Medical College, Fudan University, Shanghai, China
| | - Jinjun Li
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Ming Yao
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Shenglin Huang
- Fudan University Shanghai Cancer Center and Institutes of Biomedical Sciences, Shanghai Medical College, Fudan University, Shanghai, China
| | - Yingjun Zhao
- Fudan University Shanghai Cancer Center and Institutes of Biomedical Sciences, Shanghai Medical College, Fudan University, Shanghai, China
| | - Xianghuo He
- Fudan University Shanghai Cancer Center and Institutes of Biomedical Sciences, Shanghai Medical College, Fudan University, Shanghai, China.,Collaborative Innovation Center for Cancer Medicine, Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
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9
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Ping H, Guo L, Xi J, Wang D. Angiotensin II type 2 receptor-interacting protein 3a inhibits ovarian carcinoma metastasis via the extracellular HMGA2-mediated ERK/EMT pathway. Tumour Biol 2017. [PMID: 28651497 DOI: 10.1177/1010428317713389] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Local migration and long-distance metastasis is the main reason for higher mortality of ovarian cancer. Microtubule-associated tumor suppressor 1/angiotensin II type 2 receptor-interacting protein is associated with tumor initiation and progression and exerts anti-tumor effects. High mobility group AT-hook 2 is overexpressed in majority of metastatic carcinomas, which contributes to carcinomas metastasis through Snail-induced epithelial-to-mesenchymal transition signal pathway. The purpose of this study was to investigate the signal pathway of microtubule-associated tumor suppressor 1/angiotensin II type 2 receptor-interacting protein-mediated anti-tumor effects. Our data observed that ovarian carcinoma cells exhibited lower expression of angiotensin II type 2 receptor-interacting protein 3a and higher expression of high mobility group AT-hook 2 compared to normal ovarian cells. Restoration of angiotensin II type 2 receptor-interacting protein 3a expression in ovarian carcinoma cells inhibited high mobility group AT-hook 2 expression and exhibited anti-proliferative effects. In addition, angiotensin II type 2 receptor-interacting protein 3a treatment suppressed the phosphorylation of epithelial-to-mesenchymal transition and extracellular signal-regulated kinase in ovarian carcinoma cells. We also observed that angiotensin II type 2 receptor-interacting protein 3a restoration downregulated expression of Snail, E-Cadherin, N-Cadherin, and Vimentin in ovarian carcinoma cells, whereas angiotensin II type 2 receptor-interacting protein 3a knockdown enhanced the phosphorylation of extracellular signal-regulated kinase and epithelial-to-mesenchymal transition. In vivo assay indicated that angiotensin II type 2 receptor-interacting protein 3a inhibited ovarian tumor growth and elevated survival of tumor-bearing immunodeficient mice. Tumor histological analysis indicated that Snail, E-Cadherin, N-Cadherin, and Vimentin expression levels were downregulated via decreasing high mobility group AT-hook 2 expression. Furthermore, upregulation of angiotensin II type 2 receptor-interacting protein 3a impaired the phenotype of extracellular signal-regulated kinase and epithelial-to-mesenchymal transition in ovarian carcinoma cells and tumor tissues. Taken together, angiotensin II type 2 receptor-interacting protein 3a presents potential in suppressing the proliferation and aggressiveness of ovarian carcinoma cells through the high mobility group AT-hook 2-mediated extracellular signal-regulated kinase/epithelial-to-mesenchymal transition signal pathway.
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Affiliation(s)
- Huang Ping
- Department of Gynaecology, Cangzhou Central Hospital, Cangzhou, China
| | - Liang Guo
- Department of Gynaecology, Cangzhou Central Hospital, Cangzhou, China
| | - Jie Xi
- Department of Gynaecology, Cangzhou Central Hospital, Cangzhou, China
| | - Donghui Wang
- Department of Gynaecology, Cangzhou Central Hospital, Cangzhou, China
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Bozgeyik I, Yumrutas O, Bozgeyik E. MTUS1, a gene encoding angiotensin-II type 2 (AT2) receptor-interacting proteins, in health and disease, with special emphasis on its role in carcinogenesis. Gene 2017; 626:54-63. [PMID: 28499941 DOI: 10.1016/j.gene.2017.05.019] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2017] [Revised: 05/04/2017] [Accepted: 05/09/2017] [Indexed: 01/13/2023]
Abstract
Loss of tumor suppressor activity is a frequent event in the formation and progression of tumors and has been listed as an important hallmark of cancers. Microtubule-Associated Scaffold Protein 1 (MTUS1) is a candidate tumor suppressor gene which is reported to be frequently down-regulated in a variety of human cancers including pancreas, colon, bladder, head-and-neck, ovarian, breast cancers, gastric, lung cancers. It is also reported to be implicated in several types of pathologies such as cardiac hypertrophy, atherosclerosis, and SLE-like lymphoproliferative diseases. Moreover, MTUS1-encoded proteins are shown to be involved in the regulation of vital cellular processes such as proliferation, differentiation, DNA repair, inflammation, vascular remodeling and senescence. However, the current knowledge is very limited about the role of this gene in human cancers as well as other type diseases. Besides, there is no literature report which summarizes and criticizes the importance of MTUS1 in the cellular processes, especially in the processes of carcinogenesis. Accordingly, in this comprehensive review, we tried to shed light on the role of tumor suppressor MTUS1/ATIP in health and disease, putting special emphasis on its role in the development and progression of human cancers as well as associated molecular mechanisms and the reasons behind MTUS1/ATIP deficiency, which have been not well documented previously.
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Affiliation(s)
- Ibrahim Bozgeyik
- Adiyaman University, Faculty of Medicine, Department of Medical Biology, Adiyaman, Turkey.
| | - Onder Yumrutas
- Adiyaman University, Faculty of Medicine, Department of Medical Biology, Adiyaman, Turkey
| | - Esra Bozgeyik
- University of Gaziantep, Faculty of Medicine, Department of Medical Biology and Genetics, Gaziantep, Turkey
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11
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Ito S, Asakura M, Liao Y, Min KD, Takahashi A, Shindo K, Yamazaki S, Tsukamoto O, Asanuma H, Mogi M, Horiuchi M, Asano Y, Sanada S, Minamino T, Takashima S, Mochizuki N, Kitakaze M. Identification of the Mtus1 Splice Variant as a Novel Inhibitory Factor Against Cardiac Hypertrophy. J Am Heart Assoc 2016; 5:JAHA.116.003521. [PMID: 27385424 PMCID: PMC5015389 DOI: 10.1161/jaha.116.003521] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Background In cardiac hypertrophy and failure, there is a widespread alteration in mRNA splicing, but the role of splice variants in cardiac hypertrophy has not yet been fully elucidated. In this study, we used an exon array to identify novel splice variants associated with cardiac hypertrophy. Methods and Results We performed genome‐wide exon array analysis and developed a splicing profile in murine hearts with hypertrophy induced by transverse aortic constriction for 8 weeks. Following global analysis of splice variants using the Mouse Exon 1.0 ST Array, we identified 46 spliced genes and narrowed our focus to 1 gene, mitochondrial tumor suppressor 1 (Mtus1), whose splice variants were registered in the NCBI RefSeq database. Notably, one of the splice variants Mtus1A was specifically upregulated, although the total expression of the Mtus1 gene remained unchanged. We showed that Mtus1A was localized in the mitochondria, and its expression level increased with the degree of cardiac hypertrophy. In cultured cardiomyocytes, Mtus1A overexpression reduced phenylephrine‐induced reactive oxygen species production and consequent ERK phosphorylation, resulting in a decrease in both cell size and protein synthesis. In vivo, cardiac‐specific Mtus1A transgenic mice showed left ventricle wall thinning and a reduced hypertrophic response to pressure overload and phenylephrine treatment. Conclusions We found that Mtus1 is specifically spliced in hypertrophic hearts and that the Mtus1A variant has an inhibitory effect on cardiac hypertrophy. Mtus1A is, therefore, a possible diagnostic and therapeutic target for cardiac hypertrophy and failure.
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Affiliation(s)
- Shin Ito
- Department of Cell Biology, National Cerebral and Cardiovascular Center, Osaka, Japan
| | - Masanori Asakura
- Department of Clinical Research and Development, National Cerebral and Cardiovascular Center, Osaka, Japan
| | - Yulin Liao
- Department of Cardiology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Kyung-Duk Min
- Department of Cell Biology, National Cerebral and Cardiovascular Center, Osaka, Japan
| | - Ayako Takahashi
- Department of Cell Biology, National Cerebral and Cardiovascular Center, Osaka, Japan
| | - Kazuhiro Shindo
- Department of Cell Biology, National Cerebral and Cardiovascular Center, Osaka, Japan
| | - Satoru Yamazaki
- Department of Cell Biology, National Cerebral and Cardiovascular Center, Osaka, Japan
| | - Osamu Tsukamoto
- Department of Medical Biochemistry, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Hiroshi Asanuma
- Department of Cardiovascular Medicine, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Masaki Mogi
- Department of Molecular Cardiovascular Biology and Pharmacology, Graduate School of Medicine, Ehime University, Ehime, Japan
| | - Masatsugu Horiuchi
- Department of Molecular Cardiovascular Biology and Pharmacology, Graduate School of Medicine, Ehime University, Ehime, Japan
| | - Yoshihiro Asano
- Department of Cardiovascular Medicine, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Shoji Sanada
- Department of Cardiovascular Medicine, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Tetsuo Minamino
- Department of Cardiovascular Medicine, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Seiji Takashima
- Department of Medical Biochemistry, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Naoki Mochizuki
- Department of Cell Biology, National Cerebral and Cardiovascular Center, Osaka, Japan
| | - Masafumi Kitakaze
- Department of Clinical Research and Development, National Cerebral and Cardiovascular Center, Osaka, Japan
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Zhao T, He Q, Liu Z, Ding X, Zhou X, Wang A. Angiotensin II type 2 receptor-interacting protein 3a suppresses proliferation, migration and invasion in tongue squamous cell carcinoma via the extracellular signal-regulated kinase-Snai2 pathway. Oncol Lett 2015; 11:340-344. [PMID: 26870214 DOI: 10.3892/ol.2015.3898] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2014] [Accepted: 09/09/2015] [Indexed: 11/06/2022] Open
Abstract
Our previous studies demonstrated that the downregulation of microtubule-associated tumor suppressor 1/angiotensin II type 2 receptor-interacting protein (MTUS1/ATIP) is associated with poor differentiation and prognosis in tongue squamous cell carcinoma (TSCC), and that ATIP1 exerts an antiproliferative effect on TSCC. The aim of the present study was to further investigate the anticancer effect of MTUS1/ATIP3a in TSCC. It was observed that UM1 cells (a TSCC cell line with high migration and invasion ability) exhibited lower expression of ATIP3a compared with UM2 cells (a TSCC cell line with lower migration and invasion ability). Restoration of ATIP3a expression in UM1 cells exerted antiproliferative effects and inhibited migration and invasion, whereas knockdown of ATIP3a promoted proliferation, migration and invasion in UM2 cells. Restoration of ATIP3a expression inhibited the phosphorylation of extracellular signal-regulated kinase 1/2 (ERK1/2) and the expression of Snai2 and vimentin in UM1 cells, whereas knockdown of ATIP3a promoted the phosphorylation of ERK1/2 and the expression of Snai2 and vimentin in UM2 cells. Therefore, MTUS1/ATIP3a was found to suppress the proliferation, migration and invasion of TSCC cells via the ERK1/2-Snai2 pathway.
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Affiliation(s)
- Tingting Zhao
- Department of Oral and Maxillofacial Surgery, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guangdong 501180, P.R. China
| | - Qianting He
- Department of Oral and Maxillofacial Surgery, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guangdong 501180, P.R. China
| | - Zhonghua Liu
- Department of Oral and Maxillofacial Surgery, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guangdong 501180, P.R. China
| | - Xueqiang Ding
- Department of Oral and Maxillofacial Surgery, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guangdong 501180, P.R. China
| | - Xiaofeng Zhou
- Center for Molecular Biology of Oral Diseases, College of Dentistry, University of Illinois at Chicago, Chicago, IL 60612, USA; Department of Periodontics, College of Dentistry, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Anxun Wang
- Department of Oral and Maxillofacial Surgery, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guangdong 501180, P.R. China
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Zhao T, Ding X, Chang B, Zhou X, Wang A. MTUS1/ATIP3a down-regulation is associated with enhanced migration, invasion and poor prognosis in salivary adenoid cystic carcinoma. BMC Cancer 2015; 15:203. [PMID: 25885343 PMCID: PMC4393571 DOI: 10.1186/s12885-015-1209-x] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2014] [Accepted: 03/18/2015] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Microtubule-associated tumor suppressor gene (MTUS1) has been identified as tumor suppressor gene in many malignant tumors. In this study, we investigated the role of MTUS1 in the development of salivary adenoid cystic carcinoma (SACC) and its functional effect on the migration and invasion of SACC. METHODS Archival clinical samples including 49 primary SACC were examined for MTUS1 expression by immunohistochemistry. Statistical analyses were performed to evaluate the correlation between MTUS1 with histopathological features and survival. The expression of MTUS1/ATIP (AT2 receptor-interacting protein) isoforms was determined in SACC tissue samples and cell lines using quantitative RT-PCR assays. Then we investigated whether the migration and invasion of SACC were mediated by MTUS1/ATIP3a using in vitro cell migration and invasion assay. RESULTS We confirmed that the down-regulation of MTUS1 was a frequent event in SACC, and was correlated with distant metastasis and associated with reduced overall survival and disease free survival. Isoform specific quantitative RT-PCR assays revealed that ATIP1, ATIP3a and ATIP3b were the major isoforms of the MTUS1 gene products in SACC, and were significant down-regulation in SACC as compared to matching normal tissues. For functional analyses, we found that SACC-LM cells (SACC cell line with higher migration and invasion ability) possessed a lower expression level of ATIP3a compared to SACC-83 cells (lower migration and invasion ability). Restoration of ATIP3a expression in SACC-LM cells induced anti-proliferative activity and inhibited the migration and invasion ability. Knockdown of ATIP3a promoted the proliferation, migration and invasion ability of SACC-83 cells. Restoration of ATIP3a inhibited the phosphorylation of ERK (extracellular-regulated kinase) 1/2, the expression of Slug and Vimentin in SACC-LM cells, while knockdown of ATIP3a increased the phosphorylation of ERK1/2, the expression of Slug and Vimentin in SACC-83 cells. CONCLUSIONS Our studies confirm that MTUS1 plays an important role in the progression of SACC, and may serve as a biomarker or therapeutic target for patients with SACC. MTUS1/ATIP3a down-regulation contributes to the proliferation, migration and the invasion abilities of SACC.
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Affiliation(s)
- Tingting Zhao
- Department of Oral and Maxillofacial Surgery, the First Affiliated Hospital, Sun Yat-Sen University, 58 Zhongshan Road II, Guangzhou, Guangdong, 510080, PR China.
| | - Xueqiang Ding
- Department of Oral and Maxillofacial Surgery, the First Affiliated Hospital, Sun Yat-Sen University, 58 Zhongshan Road II, Guangzhou, Guangdong, 510080, PR China.
| | - Boyang Chang
- State Key Laboratory of Oncology in Southern China, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, 510060, PR China.
| | - Xiaofeng Zhou
- Center for Molecular Biology of Oral Diseases, College of Dentistry, University of Illinois at Chicago, Chicago, IL, 60612, USA. .,Department of Periodontics, College of Dentistry, University of Illinois at Chicago, Chicago, IL, 60612, USA.
| | - Anxun Wang
- Department of Oral and Maxillofacial Surgery, the First Affiliated Hospital, Sun Yat-Sen University, 58 Zhongshan Road II, Guangzhou, Guangdong, 510080, PR China.
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Westcott PMK, Halliwill KD, To MD, Rashid M, Rust AG, Keane TM, Delrosario R, Jen KY, Gurley KE, Kemp CJ, Fredlund E, Quigley DA, Adams DJ, Balmain A. The mutational landscapes of genetic and chemical models of Kras-driven lung cancer. Nature 2014; 517:489-92. [PMID: 25363767 PMCID: PMC4304785 DOI: 10.1038/nature13898] [Citation(s) in RCA: 248] [Impact Index Per Article: 24.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2013] [Accepted: 09/29/2014] [Indexed: 02/07/2023]
Abstract
Next-generation sequencing of human tumours has refined our understanding of the mutational processes operative in cancer initiation and progression, yet major questions remain regarding factors that induce driver mutations, and the processes that shape their selection during tumourigenesis. We performed whole-exome sequencing (WES) on adenomas from three mouse models of non-small cell lung cancer (NSCLC), induced by exposure to carcinogens (Methylnitrosourea (MNU) and Urethane), or by genetic activation of Kras (KrasLA2). Although the MNU-induced tumours carried exactly the same initiating mutation in Kras as seen in the KrasLA2 model (G12D), MNU tumours had an average of 192 non-synonymous, somatic single nucleotide variants (SNVs), compared to only 6 in tumours from the KrasLA2 model. In contrast, the KrasLA2 tumours exhibited a significantly higher level of aneuploidy and copy number alterations (CNAs) compared to the carcinogen-induced tumours, suggesting that carcinogen and genetically-engineered models adopt different routes to tumour development. The wild type (WT) allele of Kras has been shown to act as a tumour suppressor in mouse models of NSCLC. We demonstrate that urethane-induced tumours from WT mice carry mostly (94%) Q61R Kras mutations, while those from Kras heterozygous animals carry mostly (92%) Q61L mutations, indicating a major role of germline Kras status in mutation selection during initiation. The exome-wide mutation spectra in carcinogen-induced tumours overwhelmingly display signatures of the initiating carcinogen, while adenocarcinomas acquire additional C>T mutations at CpG sites. These data provide a basis for understanding the conclusions from human tumour genome sequencing that identified two broad categories based on relative frequency of SNVs and CNAs1, and underline the importance of carcinogen models for understanding the complex mutation spectra seen in human cancers.
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Affiliation(s)
- Peter M K Westcott
- 1] Helen Diller Family Comprehensive Cancer Center, University of California San Francisco, San Francisco, California 94158, USA [2] Department of Bioengineering and Therapeutic Sciences, University of California San Francisco, San Francisco, California 94158, USA
| | - Kyle D Halliwill
- 1] Helen Diller Family Comprehensive Cancer Center, University of California San Francisco, San Francisco, California 94158, USA [2] Department of Bioengineering and Therapeutic Sciences, University of California San Francisco, San Francisco, California 94158, USA
| | - Minh D To
- Helen Diller Family Comprehensive Cancer Center, University of California San Francisco, San Francisco, California 94158, USA
| | - Mamunur Rashid
- Experimental Cancer Genetics, Wellcome Trust Sanger Institute, Hinxton, Cambridge CB10 1HH, UK
| | - Alistair G Rust
- Experimental Cancer Genetics, Wellcome Trust Sanger Institute, Hinxton, Cambridge CB10 1HH, UK
| | - Thomas M Keane
- Experimental Cancer Genetics, Wellcome Trust Sanger Institute, Hinxton, Cambridge CB10 1HH, UK
| | - Reyno Delrosario
- Helen Diller Family Comprehensive Cancer Center, University of California San Francisco, San Francisco, California 94158, USA
| | - Kuang-Yu Jen
- Department of Pathology, University of California San Francisco, San Francisco, California 94143, USA
| | - Kay E Gurley
- Fred Hutchinson Cancer Research Center, Seattle, Washington 98109, USA
| | | | - Erik Fredlund
- Science for Life Laboratory, Department of Oncology-Pathology, Karolinska Institute, Stockholm 171 21, Sweden
| | - David A Quigley
- Helen Diller Family Comprehensive Cancer Center, University of California San Francisco, San Francisco, California 94158, USA
| | - David J Adams
- Experimental Cancer Genetics, Wellcome Trust Sanger Institute, Hinxton, Cambridge CB10 1HH, UK
| | - Allan Balmain
- 1] Helen Diller Family Comprehensive Cancer Center, University of California San Francisco, San Francisco, California 94158, USA [2] Department of Biochemistry and Biophysics, University of California San Francisco, San Francisco, California 94158, USA
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Rogler A, Hoja S, Giedl J, Ekici AB, Wach S, Taubert H, Goebell PJ, Wullich B, Stöckle M, Lehmann J, Petsch S, Hartmann A, Stoehr R. Loss of MTUS1/ATIP expression is associated with adverse outcome in advanced bladder carcinomas: data from a retrospective study. BMC Cancer 2014; 14:214. [PMID: 24650297 PMCID: PMC3994487 DOI: 10.1186/1471-2407-14-214] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2013] [Accepted: 03/12/2014] [Indexed: 11/17/2022] Open
Abstract
Background Seventy percent of all bladder tumours tend to recur and need intensive surveillance, and a subset of tumours progress to muscle-invasive and metastatic disease. However, it is still difficult to find the adequate treatment for every individual patient as it is a very heterogeneous disease and reliable biomarkers are still missing. In our study we searched for new target genes in the critical chromosomal region 8p and investigated the potential tumour suppressor gene candidate MTUS1/ATIP in bladder cancer. Methods MTUS1 was identified to be the most promising deleted target gene at 8p in aCGH analysis with 19 papillary bladder tumours. A correlation with bladder cancer was further validated using immunohistochemistry of 85 papillary and 236 advanced bladder tumours and in functional experiments. Kaplan-Meier analysis and multivariate Cox-regression addressed overall survival (OS) and disease-specific survival (DSS) as a function of MTUS1/ATIP expression. Bivariate correlations investigated associations between MTUS1/ATIP expression, patient characteristics and histopathology. MTUS1 expression was analysed in cell lines and overexpressed in RT112, where impact on viability, proliferation and migration was measured. Results MTUS1 protein expression was lost in almost 50% of all papillary and advanced bladder cancers. Survival, however, was only influenced in advanced carcinomas, where loss of MTUS1 was associated with adverse OS and DSS. In this cohort, there was also a significant correlation of MTUS1 expression and histological subtype: positive expression was detected in all micropapillary tumours and aberrant nuclear staining was detected in a subset of plasmocytoid urothelial carcinomas. MTUS1 was expressed in all investigated bladder cell lines and overexpression in RT112 led to significantly decreased viability. Conclusions MTUS1 is a tumour suppressor gene in cultured bladder cancer cells and in advanced bladder tumours. It might represent one new target gene at chromosome 8p and can be used as an independent prognostic factor for advanced bladder cancer patients. The limitation of the study is the retrospective data analysis. Thus, findings should be validated with a prospective advanced bladder tumour cohort.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | - Robert Stoehr
- Institute of Pathology, University Hospital Erlangen, Krankenhausstr, 8-10 91054 Erlangen, Germany.
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Guimond MO, Battista MC, Nikjouitavabi F, Carmel M, Barres V, Doueik AA, Fazli L, Gleave M, Sabbagh R, Gallo-Payet N. Expression and role of the angiotensin II AT2 receptor in human prostate tissue: in search of a new therapeutic option for prostate cancer. Prostate 2013; 73:1057-68. [PMID: 23389987 DOI: 10.1002/pros.22653] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/19/2012] [Accepted: 01/16/2013] [Indexed: 12/13/2022]
Abstract
BACKGROUND Evidence shows that angiotensin II type 1 receptor (AT1R) blockers may be associated with improved outcome in prostate cancer patients. It has been proposed that part of this effect could be due to angiotensin II type 2 receptor (AT2R) activation, the only active angiotensin II receptor in this situation. This study aimed to characterize the localization and expression of AT2R in prostate tissues and to assess its role on cell morphology and number in prostatic epithelial cells in primary culture. METHODS AT2R and its AT2R-interacting protein (ATIP) expression were assessed on non-tumoral and tumoral human prostate using tissue microarray immunohistochemistry, binding assay, and Western blotting. AT2R effect on cell number was measured in primary cultures of epithelial cells from non-tumoral human prostate. RESULTS AT2R was localized at the level of the acinar epithelial layer and its expression decreased in cancers with a Gleason score 6 or higher. In contrast, ATIP expression increased with cancer progression. Treatment of primary cell cultures from non-tumoral prostate tissues with C21/M024, a selective AT2R agonist, alone or in co-incubation with losartan, an AT1R antagonist, significantly decreased cell number compared to untreated cells. CONCLUSIONS AT2R and ATIP are present in non-tumoral human prostate tissues and differentially regulated according to Gleason score. The decrease in non-tumoral prostate cell number upon selective AT2R stimulation suggests that AT2R may have a protective role against prostate cancer development. Treatment with a selective AT2R agonist could represent a new approach for prostate cancer prevention or for patients on active surveillance.
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Affiliation(s)
- Marie-Odile Guimond
- Endocrinology Division, Department of Medicine, Faculté de Médecine et des Sciences de la Santé, Université de Sherbrooke, Sherbrooke, Quebec, Canada
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Jing F, Mogi M, Min LJ, Ohshima K, Nakaoka H, Tsukuda K, Wang X, Iwanami J, Horiuchi M. Effect of angiotensin II type 2 receptor-interacting protein on adipose tissue function via modulation of macrophage polarization. PLoS One 2013; 8:e60067. [PMID: 23565185 PMCID: PMC3614946 DOI: 10.1371/journal.pone.0060067] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2013] [Accepted: 02/21/2013] [Indexed: 12/12/2022] Open
Abstract
We demonstrated that angiotensin II type 2 (AT2) receptor-interacting protein (ATIP) 1 ameliorates inflammation-mediated vascular remodeling independent of the AT2 receptor, leading us to explore the possibility of whether ATIP1 could exert anti-inflammatory effects and play a role in other pathophysiological conditions. We examined the possible anti-inflammatory effects of ATIP1 in adipose tissue associated with amelioration of insulin resistance. In mice fed a high-cholesterol diet, adipose tissue macrophage (ATM) infiltration and M1-to-M2 ratio were decreased in ATIP1 transgenic mice (ATIP1-Tg) compared with wild-type mice (WT), with decreased expression of inflammatory cytokines such as tumor necrosis factor-α and monocyte chemoattractant protein-1 in white adipose tissue (WAT), but an increase in interleukin-10, an anti-inflammatory cytokine. Moreover, 2-[3H]deoxy-d-glucose (2-[3H]DG) uptake was significantly increased in ATIP1-Tg compared with WT. Next, we examined the roles of ATIP1 in BM-derived hematopoietic cells, employing chimeric mice produced by BM transplantation into irradiated type 2 diabetic mice with obesity, KKAy, as recipients. ATM infiltration and M1-to-M2 ratio were decreased in ATIP1 chimera (ATIP1-tg as BM donor), with improvement of insulin-mediated 2-[3H]DG uptake and amelioration of inflammation in WAT. Moreover, serum adiponectin concentration in ATIP1 chimera was significantly higher than that in WT chimera (WT as BM donor) and KKAy chimera (KKAy as BM donor). These results indicate that ATIP1 could exert anti-inflammatory effects in adipose tissue via macrophage polarization associated with improvement of insulin resistance, and ATIP1 in hematopoietic cells may contribute to these beneficial effects on adipose tissue functions in type 2 diabetes.
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Affiliation(s)
- Fei Jing
- Department of Molecular Cardiovascular Biology and Pharmacology, Ehime University Graduate School of Medicine, Ehime, Japan
| | - Masaki Mogi
- Department of Molecular Cardiovascular Biology and Pharmacology, Ehime University Graduate School of Medicine, Ehime, Japan
| | - Li-Juan Min
- Department of Molecular Cardiovascular Biology and Pharmacology, Ehime University Graduate School of Medicine, Ehime, Japan
| | - Kousei Ohshima
- Department of Molecular Cardiovascular Biology and Pharmacology, Ehime University Graduate School of Medicine, Ehime, Japan
| | - Hirotomo Nakaoka
- Department of Molecular Cardiovascular Biology and Pharmacology, Ehime University Graduate School of Medicine, Ehime, Japan
| | - Kana Tsukuda
- Department of Molecular Cardiovascular Biology and Pharmacology, Ehime University Graduate School of Medicine, Ehime, Japan
| | - Xiaoli Wang
- Department of Molecular Cardiovascular Biology and Pharmacology, Ehime University Graduate School of Medicine, Ehime, Japan
| | - Jun Iwanami
- Department of Molecular Cardiovascular Biology and Pharmacology, Ehime University Graduate School of Medicine, Ehime, Japan
| | - Masatsugu Horiuchi
- Department of Molecular Cardiovascular Biology and Pharmacology, Ehime University Graduate School of Medicine, Ehime, Japan
- * E-mail:
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Abstract
The RAS (renin–angiotensin system) plays a role not only in the cardiovascular system, including blood pressure regulation, but also in the central nervous system. AngII (angiotensin II) binds two major receptors: the AT1 receptor (AngII type 1 receptor) and AT2 receptor (AngII type 2 receptor). It has been recognized that AT2 receptor activation not only opposes AT1 receptor actions, but also has unique effects beyond inhibitory cross-talk with AT1 receptor signalling. Novel pathways beyond the classical actions of RAS, the ACE (angiotensin-converting enzyme)/AngII/AT1 receptor axis, have been highlighted: the ACE2/Ang-(1–7) [angiotensin-(1–7)]/Mas receptor axis as a new opposing axis against the ACE/AngII/AT1 receptor axis, novel AngII-receptor-interacting proteins and various AngII-receptor-activation mechanisms including dimer formation. ATRAP (AT1-receptor-associated protein) and ATIP (AT2-receptor-interacting protein) are well-characterized AngII-receptor-associated proteins. These proteins could regulate the functions of AngII receptors and thereby influence various pathophysiological states. Moreover, the possible cross-talk between PPAR (peroxisome-proliferator-activated receptor)-γ and AngII receptor subtypes is an intriguing issue to be addressed in order to understand the roles of RAS in the metabolic syndrome, and interestingly some ARBs (AT1-receptor blockers) have been reported to have an AT1-receptor-blocking action with a partial PPAR-γ agonistic effect. These emerging concepts concerning the regulation of AngII receptors are discussed in the present review.
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Zuern C, Krenacs L, Starke S, Heimrich J, Palmetshofer A, Holtmann B, Sendtner M, Fischer T, Galle J, Wanner C, Seibold S. Microtubule associated tumor suppressor 1 deficient mice develop spontaneous heart hypertrophy and SLE-like lymphoproliferative disease. Int J Oncol 2011; 40:1079-88. [PMID: 22200760 PMCID: PMC3584557 DOI: 10.3892/ijo.2011.1311] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2011] [Accepted: 07/25/2011] [Indexed: 11/05/2022] Open
Abstract
The microtubule associated tumor suppressor gene 1 (MTUS1) is a recently published tumor suppressor gene, which has also been shown to act as an early component in the growth inhibitory signaling cascade of the angiotensin II type 2 receptor (AT2R). In this study we report the generation of MTUS1 knock-out (KO) mice, which develop normally but reveal higher body weights and slightly decreased blood pressure levels. Twenty-eight percent of the studied MTUS1 KO mice also developed heart hypertrophy and 12% developed nephritis, independent of blood pressure levels. Forty-three percent of the MTUS1 KO mice revealed lymphoid hyperplasia affecting spleen (20%), kidney (37%), lung (23%), lymph nodes (17%), and liver (17%) accompanied with leukocytosis, lymphocytosis, and mild anemia. One animal (3%) developed a marginal zone B-cell lymphoma affecting submandibular salivary gland and regional lymph nodes. The symptoms of all mentioned animals are consistent with a B-cell lymphoproliferative disease with features of systemic lupus erythematosus. In addition, body weight of the MTUS1 KO mice was significantly increased and isolated skin fibroblasts showed increased cell proliferation and decreased cell size, compared to wild-type (WT) fibroblasts in response to depleted FCS concentration and lack of growth factors. In conclusion we herein report the first generation of a MTUS1 KO mouse, developing spontaneous heart hypertrophy and increased cell proliferation, confirming once more the anti-proliferative effect of MTUS1, and a SLE-like lymphoproliferative disease suggesting crucial role in regulation of inflammation. These MTUS1 KO mice can therefore serve as a model for further investigations in cardiovascular disease, autoimmune disease and carcinogenesis.
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Affiliation(s)
- Christina Zuern
- Department of Nephrology and Hypertension, University of Erlangen-Nuernberg, Loschgestr 8, 91054 Erlangen, Germany.
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Ding X, Zhang N, Cai Y, Li S, Zheng C, Jin Y, Yu T, Wang A, Zhou X. Down-regulation of tumor suppressor MTUS1/ATIP is associated with enhanced proliferation, poor differentiation and poor prognosis in oral tongue squamous cell carcinoma. Mol Oncol 2012; 6:73-80. [PMID: 22153618 DOI: 10.1016/j.molonc.2011.11.002] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2011] [Revised: 11/07/2011] [Accepted: 11/10/2011] [Indexed: 01/28/2023] Open
Abstract
Microtubule-associated tumor suppressor gene (MTUS1, also known as mitochondrial tumor suppressor) is a recently identified tumor suppressor gene that has been implicated in several cancer types. The expression of MTUS1 gene leads to 5 known transcript variants and codes for 5 isoforms of Angiotensin II AT2 receptor interacting protein (ATIP). In this study, we first confirmed that the down-regulation of MTUS1/ATIP was a frequent event in oral tongue squamous cell carcinoma (OTSCC) and the premalignant lesion (leukoplakia). We further demonstrated that the down-regulation of MTUS1/ATIP was correlated with poor differentiation and enhanced proliferation (Ki67 proliferation index). Statistical analysis suggests that the down-regulation of MTUS1/ATIP was associated with reduced overall survival. Isoform specific quantitative RT-PCR assays revealed that ATIP1, ATIP3a and ATIP3b were the major isoforms of the MTUS1 gene products in oral tongue epithelial cells. Significant down-regulations were observed for all 3 ATIP isoforms in OTSCC as compared to matching normal tissues. In vitro functional study showed that the restoration of ATIP1 expression led to G1 arrest, apoptosis and reduction of cell proliferation in OTSCC cell lines. These ATIP1-induced cellular changes were accompanied by reduced phosphorylation of ERK1/2 and up-regulation of p53. Taken together, these data suggest that MTUS1 plays major roles in the progression of OTSCC, and may serve as a biomarker or therapeutic target for patients with OTSCC.
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Takasu S, Mutoh M, Takahashi M, Nakagama H. Lipoprotein lipase as a candidate target for cancer prevention/therapy. Biochem Res Int 2012; 2012:398697. [PMID: 22028972 DOI: 10.1155/2012/398697] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2011] [Accepted: 08/17/2011] [Indexed: 12/30/2022] Open
Abstract
Epidemiological studies have shown that serum triglyceride (TG) levels are linked with risk of development of cancer, including colorectal and pancreatic cancers, and their precancerous lesions. Thus, it is assumed that serum TG plays an important role in carcinogenesis, and the key enzyme lipoprotein lipase (LPL), which catalyzes the hydrolysis of plasma TG, may therefore be involved. Dysregulation of LPL has been reported to contribute to many human diseases, such as atherosclerosis, chylomicronaemia, obesity, and type 2 diabetes. Recently, it has been reported that LPL gene deficiency, such as due to chromosome 8p22 loss, LPL gene polymorphism, and epigenetic changes in its promoter region gene, increases cancer risk, especially in the prostate. In animal experiments, high serum TG levels seem to promote sporadic/carcinogen-induced genesis of colorectal and pancreatic cancers. Interestingly, tumor suppressive effects of LPL inducers, such as PPAR ligands, NO-1886, and indomethacin, have been demonstrated in animal models. Moreover, recent evidence that LPL plays important roles in inflammation and obesity implies that it is an appropriate general target for chemopreventive and chemotherapeutic agents.
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Louis SNS, Chow LTC, Varghayee N, Rezmann LA, Frauman AG, Louis WJ. The Expression of MTUS1/ATIP and Its Major Isoforms, ATIP1 and ATIP3, in Human Prostate Cancer. Cancers (Basel) 2011; 3:3824-37. [PMID: 24213113 PMCID: PMC3763398 DOI: 10.3390/cancers3043824] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2011] [Revised: 09/22/2011] [Accepted: 09/28/2011] [Indexed: 11/25/2022] Open
Abstract
Angiotensin II (Ang II), the main effector of the renin angiotensin system, acts upon two distinct transmembrane receptors, the Ang II type 1 and the type 2 (AT2-) receptor, to induce promotion and inhibition of ERK2 phosphorylation. The AT2-receptor, through an interaction with its putative signaling partner MTUS1/ATIP (AT2-receptor interacting protein), inhibits the mitogenic effects of EGF in prostate cancer cell lines representing both early and late stage disease. This is the first report on the expression of ATIP in normal and malignant human prostatic biopsies. The expression of ATIP and its major isoforms, ATIP1 and ATIP3, in normal prostatic cells and three prostate cancer cell lines was examined using QPCR and immunohistochemistry. Human biopsies containing benign prostatic hyperplasia (BPH), high grade prostatic intraepithelial neoplasia (HGPIN) and well, moderately and poorly differentiated prostate cancer were also examined. Overall, ATIP1 and ATIP3 mRNA expression was increased in malignant compared to normal tissues and cell lines. ATIP immunostaining was low or absent in both the basal and columnar epithelial cell layers surrounding BPH acini; however, it was observed in high concentration in neoplastic epithelial cells of HGPIN and was clearly evident in cytoplasms of malignant cells in all prostate cancer grades. ATIP immunostaining was also identified in the cytoplasms of LNCaP and PC3 prostate cancer cells. As the AT2-receptor/ATIP inhibitory signaling pathway exists in malignant cells in all grades of prostate cancer, enhancement of this pathway may be a therapeutic target even after the development of androgen-independence.
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Affiliation(s)
- Simon N S Louis
- Clinical Pharmacology and Therapeutics Unit, Department of Medicine, University of Melbourne, Austin Health, Heidelberg 3084, Victoria, Australia.
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Brown J, Bothma H, Veale R, Willem P. Genomic imbalances in esophageal carcinoma cell lines involve Wnt pathway genes. World J Gastroenterol 2011; 17:2909-23. [PMID: 21734802 PMCID: PMC3129505 DOI: 10.3748/wjg.v17.i24.2909] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/07/2010] [Revised: 10/30/2010] [Accepted: 11/06/2010] [Indexed: 02/06/2023] Open
Abstract
AIM: To identify molecular markers shared across South African esophageal squamous cell carcinoma (ESCC) cell lines using cytogenetics, fluorescence in situ hybridization (FISH) and single nucleotide polymorphism (SNP) array copy number analysis.
METHODS: We used conventional cytogenetics, FISH, and multicolor FISH to characterize the chromosomal rearrangements of five ESCC cell lines established in South Africa. The whole genome copy number profile was established from 250K SNP arrays, and data was analyzed with the CNAT 4.0 and GISTIC software.
RESULTS: We detected common translocation breakpoints involving chromosomes 1p11-12 and 3p11.2, the latter correlated with the deletion, or interruption of the EPHA3 gene. The most significant amplifications involved the following chromosomal regions and genes: 11q13.3 (CCND1, FGF3, FGF4, FGF19, MYEOV), 8q24.21(C-MYC, FAM84B), 11q22.1-q22.3 (BIRC2, BIRC3), 5p15.2 (CTNND2), 3q11.2-q12.2 (MINA) and 18p11.32 (TYMS, YES1). The significant deletions included 1p31.2-p31.1 (CTH, GADD45α, DIRAS3), 2q22.1 (LRP1B), 3p12.1-p14.2 (FHIT), 4q22.1-q32.1 (CASP6, SMAD1), 8p23.2-q11.1 (BNIP3L) and 18q21.1-q21.2 (SMAD4, DCC). The 3p11.2 translocation breakpoint was shared across four cell lines, supporting a role for genes involved at this site, in particular, the EPHA3 gene which has previously been reported to be deleted in ESCC.
CONCLUSION: The finding that a significant number of genes that were amplified (FGF3, FGF4, FGF19, CCND1 and C-MYC) or deleted (SFRP2 gene) are involved in the Wnt and fibroblast growth factor signaling pathways, suggests that these pathways may be activated in these cell lines.
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Hedan B, Thomas R, Motsinger-Reif A, Abadie J, Andre C, Cullen J, Breen M. Molecular cytogenetic characterization of canine histiocytic sarcoma: A spontaneous model for human histiocytic cancer identifies deletion of tumor suppressor genes and highlights influence of genetic background on tumor behavior. BMC Cancer 2011; 11:201. [PMID: 21615919 PMCID: PMC3121728 DOI: 10.1186/1471-2407-11-201] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2010] [Accepted: 05/26/2011] [Indexed: 01/20/2023] Open
Abstract
Background Histiocytic malignancies in both humans and dogs are rare and poorly understood. While canine histiocytic sarcoma (HS) is uncommon in the general domestic dog population, there is a strikingly high incidence in a subset of breeds, suggesting heritable predisposition. Molecular cytogenetic profiling of canine HS in these breeds would serve to reveal recurrent DNA copy number aberrations (CNAs) that are breed and/or tumor associated, as well as defining those shared with human HS. This process would identify evolutionarily conserved cytogenetic changes to highlight regions of particular importance to HS biology. Methods Using genome wide array comparative genomic hybridization we assessed CNAs in 104 spontaneously occurring HS from two breeds of dog exhibiting a particularly elevated incidence of this tumor, the Bernese Mountain Dog and Flat-Coated Retriever. Recurrent CNAs were evaluated further by multicolor fluorescence in situ hybridization and loss of heterozygosity analyses. Statistical analyses were performed to identify CNAs associated with tumor location and breed. Results Almost all recurrent CNAs identified in this study were shared between the two breeds, suggesting that they are associated more with the cancer phenotype than with breed. A subset of recurrent genomic imbalances suggested involvement of known cancer associated genes in HS pathogenesis, including deletions of the tumor suppressor genes CDKN2A/B, RB1 and PTEN. A small number of aberrations were unique to each breed, implying that they may contribute to the major differences in tumor location evident in these two breeds. The most highly recurrent canine CNAs revealed in this study are evolutionarily conserved with those reported in human histiocytic proliferations, suggesting that human and dog HS share a conserved pathogenesis. Conclusions The breed associated clinical features and DNA copy number aberrations exhibited by canine HS offer a valuable model for the human counterpart, providing additional evidence towards elucidation of the pathophysiological and genetic mechanisms associated with histiocytic malignancies. Extrapolation of data derived from canine histiocytic disorders to human histiocytic proliferation may help to further our understanding of the propagation and cancerization of histiocytic cells, contributing to development of new and effective therapeutic modalities for both species.
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Affiliation(s)
- Benoit Hedan
- Department of Molecular Biomedical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, USA
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Hoenerhoff MJ, Pandiri AR, Lahousse SA, Hong HH, Ton TV, Masinde T, Auerbach SS, Gerrish K, Bushel PR, Shockley KR, Peddada SD, Sills RC. Global gene profiling of spontaneous hepatocellular carcinoma in B6C3F1 mice: similarities in the molecular landscape with human liver cancer. Toxicol Pathol 2011; 39:678-99. [PMID: 21571946 DOI: 10.1177/0192623311407213] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Hepatocellular carcinoma (HCC) is an important cause of morbidity and mortality worldwide. Although the risk factors of human HCC are well known, the molecular pathogenesis of this disease is complex, and in general, treatment options remain poor. The use of rodent models to study human cancer has been extensively pursued, both through genetically engineered rodents and rodent models used in carcinogenicity and toxicology studies. In particular, the B6C3F1 mouse used in the National Toxicology Program (NTP) two-year bioassay has been used to evaluate the carcinogenic effects of environmental and occupational chemicals, and other compounds. The high incidence of spontaneous HCC in the B6C3F1 mouse has challenged its use as a model for chemically induced HCC in terms of relevance to the human disease. Using global gene expression profiling, we identify the dysregulation of several mediators similarly altered in human HCC, including re-expression of fetal oncogenes, upregulation of protooncogenes, downregulation of tumor suppressor genes, and abnormal expression of cell cycle mediators, growth factors, apoptosis regulators, and angiogenesis and extracellular matrix remodeling factors. Although major differences in etiology and pathogenesis remain between human and mouse HCC, there are important similarities in global gene expression and molecular pathways dysregulated in mouse and human HCC. These data provide further support for the use of this model in hazard identification of compounds with potential human carcinogenicity risk, and may help in better understanding the mechanisms of tumorigenesis resulting from chemical exposure in the NTP two-year carcinogenicity bioassay.
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Affiliation(s)
- Mark J Hoenerhoff
- Cellular and Molecular Pathology Branch, National Institute of Environmental Health Science, National Institutes of Health, Research Triangle Park, North Carolina 27709, USA.
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Krezel MA, Rezmann LA, Varghayee N, Pete J, Frauman AG, Louis SN. Gene sequencing and tissue expression of unknown isoforms of an angiotensin II type 2 receptor interacting protein, ATIP, in the rat. Biosci Biotechnol Biochem 2011; 75:414-8. [PMID: 21389599 DOI: 10.1271/bbb.100176] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
To investigate the expression of the unknown angiotensin II type 2 receptor interacting protein (ATIP) isoforms in the rat we used the known sequences of human and mouse ATIP to design sequencing primers to enable us to sequence rat ATIP3 and ATIP4. Exon 4, which is present in human but not mouse ATIP, was not identified in the coding region of rat ATIP. The expression levels of these genes in a range of rat tissues were examined, and we concluded that there is little similarity in the relative tissue distribution of the various ATIP isoforms in rat and human.
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Rodrigues-Ferreira S, Nahmias C. An ATIPical family of angiotensin II AT2 receptor-interacting proteins. Trends Endocrinol Metab 2010; 21:684-90. [PMID: 20889352 DOI: 10.1016/j.tem.2010.08.009] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/05/2010] [Revised: 08/27/2010] [Accepted: 08/30/2010] [Indexed: 01/11/2023]
Abstract
AT2, the second subtype of angiotensin II receptors, is a major component of the renin-angiotensin system involved in cardiovascular and neuronal functions. AT2 belongs to the superfamily of G protein-coupled receptors, but its intracellular signaling pathways have long remained elusive. Over the past few years, efforts to characterize this atypical receptor have led to the identification of novel molecular scaffolds that directly bind to its intracellular tail. The present review focuses on a family of AT2 receptor-interacting proteins (ATIPs) involved in neuronal differentiation, vascular remodeling and tumor suppression. Recent findings that ATIPs and ATIP-related proteins associate with microtubules suggest that they might constitute a novel family of multifunctional proteins regulating a wide range of physiopathological functions.
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Abstract
BACKGROUND We have previously demonstrated Ang II type 2 (AT(2)-) receptor-mediated inhibition of EGF-induced prostate cancer cell growth in androgen-dependent (LNCaP) and independent (PC3) prostate cancer cell lines. METHODS To explore the signaling pathways involved in this inhibitory effect, we examined the interaction of the AT(2)-receptor with its novel regulatory partner ATIP using real time PCR, over-expression, siRNA and [(3)H]thymidine incorporation assays. RESULTS The results in human prostate cancer cell lines demonstrate the presence of ATIP in both cell lines examined, and suggest that (i) the AT(2)-receptor through an interaction with ATIP mediates an anti-growth factor effect in both androgen-dependent and androgen-independent cell lines; (ii) ATIP expression decreases as the rate of cell growth and androgen-independence increase; and (iii) EGF may act on cell growth in part by reducing the content of ATIP present in the cells. CONCLUSIONS The results support our earlier proposal in normal cell lines that ATIP is an important component of the cellular response to AT(2)-receptor activation. The results further suggest that a critical level of ATIP is required to mediate the effect of AT(2)-receptor activation to inhibit EGF mediated increases in cell growth. They also suggest that EGF may in part induce cell growth by suppressing the level of ATIP expression.
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Affiliation(s)
- Simon N.S. Louis
- Clinical Pharmacology and Therapeutics Unit, University of Melbourne, Department of Medicine, Austin Health, Heidelberg, Victoria, Australia
- Correspondence to: S.N.S. Louis, Department of Medicine, Austin Health, Clinical Pharmacology and Therapeutics Unit, Studley Rd, Level 5 Lance Townsend Building, Heidelberg 3084, Victoria, Australia.
| | - Laurie Chow
- Clinical Pharmacology and Therapeutics Unit, University of Melbourne, Department of Medicine, Austin Health, Heidelberg, Victoria, Australia
| | - Linda Rezmann
- Clinical Pharmacology and Therapeutics Unit, University of Melbourne, Department of Medicine, Austin Health, Heidelberg, Victoria, Australia
| | - Michael A. Krezel
- Clinical Pharmacology and Therapeutics Unit, University of Melbourne, Department of Medicine, Austin Health, Heidelberg, Victoria, Australia
| | - Kevin J. Catt
- Section on Hormonal Regulation, PEDGEN, NICHD, National Institutes of Health, Bethesda, Maryland
| | - Chris Tikellis
- Baker Heart Research Institute, Melbourne, Victoria, Australia
| | - Albert G. Frauman
- Clinical Pharmacology and Therapeutics Unit, University of Melbourne, Department of Medicine, Austin Health, Heidelberg, Victoria, Australia
| | - William J. Louis
- Clinical Pharmacology and Therapeutics Unit, University of Melbourne, Department of Medicine, Austin Health, Heidelberg, Victoria, Australia
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Rodrigues-Ferreira S, Di Tommaso A, Dimitrov A, Cazaubon S, Gruel N, Colasson H, Nicolas A, Chaverot N, Molinié V, Reyal F, Sigal-Zafrani B, Terris B, Delattre O, Radvanyi F, Perez F, Vincent-Salomon A, Nahmias C. 8p22 MTUS1 gene product ATIP3 is a novel anti-mitotic protein underexpressed in invasive breast carcinoma of poor prognosis. PLoS One 2009; 4:e7239. [PMID: 19794912 PMCID: PMC2749209 DOI: 10.1371/journal.pone.0007239] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2009] [Accepted: 09/05/2009] [Indexed: 11/18/2022] Open
Abstract
Background Breast cancer is a heterogeneous disease that is not totally eradicated by current therapies. The classification of breast tumors into distinct molecular subtypes by gene profiling and immunodetection of surrogate markers has proven useful for tumor prognosis and prediction of effective targeted treatments. The challenge now is to identify molecular biomarkers that may be of functional relevance for personalized therapy of breast tumors with poor outcome that do not respond to available treatments. The Mitochondrial Tumor Suppressor (MTUS1) gene is an interesting candidate whose expression is reduced in colon, pancreas, ovary and oral cancers. The present study investigates the expression and functional effects of MTUS1 gene products in breast cancer. Methods and Findings By means of gene array analysis, real-time RT-PCR and immunohistochemistry, we show here that MTUS1/ATIP3 is significantly down-regulated in a series of 151 infiltrating breast cancer carcinomas as compared to normal breast tissue. Low levels of ATIP3 correlate with high grade of the tumor and the occurrence of distant metastasis. ATIP3 levels are also significantly reduced in triple negative (ER- PR- HER2-) breast carcinomas, a subgroup of highly proliferative tumors with poor outcome and no available targeted therapy. Functional studies indicate that silencing ATIP3 expression by siRNA increases breast cancer cell proliferation. Conversely, restoring endogenous levels of ATIP3 expression leads to reduced cancer cell proliferation, clonogenicity, anchorage-independent growth, and reduces the incidence and size of xenografts grown in vivo. We provide evidence that ATIP3 associates with the microtubule cytoskeleton and localizes at the centrosomes, mitotic spindle and intercellular bridge during cell division. Accordingly, live cell imaging indicates that ATIP3 expression alters the progression of cell division by promoting prolonged metaphase, thereby leading to a reduced number of cells ungergoing active mitosis. Conclusions Our results identify for the first time ATIP3 as a novel microtubule-associated protein whose expression is significantly reduced in highly proliferative breast carcinomas of poor clinical outcome. ATIP3 re-expression limits tumor cell proliferation in vitro and in vivo, suggesting that this protein may represent a novel useful biomarker and an interesting candidate for future targeted therapies of aggressive breast cancer.
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Affiliation(s)
| | - Anne Di Tommaso
- Institut Cochin, Université Paris Descartes, Inserm U567, CNRS UMR8104, Paris, France
| | | | - Sylvie Cazaubon
- Institut Cochin, Université Paris Descartes, Inserm U567, CNRS UMR8104, Paris, France
| | - Nadège Gruel
- Inserm U830, Institut Curie, Paris, France
- Translational Research Department, Institut Curie, Paris, France
| | - Hélène Colasson
- Institut Cochin, Université Paris Descartes, Inserm U567, CNRS UMR8104, Paris, France
| | | | - Nathalie Chaverot
- Institut Cochin, Université Paris Descartes, Inserm U567, CNRS UMR8104, Paris, France
| | | | | | - Brigitte Sigal-Zafrani
- Translational Research Department, Institut Curie, Paris, France
- Pathology Department, Hopital Curie, Paris, France
| | | | - Olivier Delattre
- Inserm U830, Institut Curie, Paris, France
- Translational Research Department, Institut Curie, Paris, France
| | | | | | - Anne Vincent-Salomon
- Translational Research Department, Institut Curie, Paris, France
- Pathology Department, Hopital Curie, Paris, France
| | - Clara Nahmias
- Institut Cochin, Université Paris Descartes, Inserm U567, CNRS UMR8104, Paris, France
- * E-mail:
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Chow L, Rezmann L, Catt KJ, Louis WJ, Frauman AG, Nahmias C, Louis SNS. Role of the renin-angiotensin system in prostate cancer. Mol Cell Endocrinol 2009; 302:219-29. [PMID: 18824067 DOI: 10.1016/j.mce.2008.08.032] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/11/2008] [Revised: 08/29/2008] [Accepted: 08/29/2008] [Indexed: 11/19/2022]
Abstract
Prostate cancer is highly prevalent in Western society, and its early stages can be controlled by androgen ablation therapy. However, the cancer eventually regresses to an androgen-independent state for which there is no effective treatment. The renin-angiotensin system (RAS), in particular the octapeptide angiotensin II, is now recognised to have important effects on growth factor signalling and cell growth in addition to its well known actions on blood pressure, fluid homeostasis and electrolyte balance. All components of the RAS have been recently identified in the prostate, consistent with the expression of a local RAS system in this tissue. This review focuses on the role of the RAS in the prostate, and the possibility that this pathway may be a potential therapeutic target for the treatment of prostate cancer and other prostatic diseases.
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Affiliation(s)
- L Chow
- University of Melbourne, Department of Medicine, Austin Health, Heidelberg, Victoria, Australia
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Fujita T, Mogi M, Min LJ, Iwanami J, Tsukuda K, Sakata A, Okayama H, Iwai M, Nahmias C, Higaki J, Horiuchi M. Attenuation of Cuff-Induced Neointimal Formation by Overexpression of Angiotensin II Type 2 Receptor-Interacting Protein 1. Hypertension 2009; 53:688-93. [DOI: 10.1161/hypertensionaha.108.128140] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Recently we have cloned angiotensin II type 2 receptor–interacting protein 1 (ATIP1) as a novel protein that interacts specifically with the C-terminal tail of the angiotensin II type 2 receptor; however, the pathophysiological roles of ATIP1 in vascular remodeling are still unknown. Here, we generated ATIP1-transgenic (ATIP1-Tg) mice expressing mouse ATIP1 and investigated the role of ATIP1 in vascular remodeling using these transgenic mice. ATIP1-Tg mice exhibited no significant difference in blood pressure compared with wild-type (WT) mice. Angiotensin II type 2 receptor mRNA expression in the femoral artery was increased in injured femoral arteries, reaching a peak at 7 days after operation in WT mice, and a similar result of angiotensin II type 2 receptor expression was observed in ATIP1-Tg mice. In ATIP1-Tg mice, neointimal formation of the femoral artery 14 days after cuff placement was significantly smaller than that in WT mice. 5-Bromo-2′-deoxyuridine incorporation was significantly reduced in the injured arteries of ATIP1-Tg mice compared with WT mice. In ATIP1-Tg mice, superoxide anion production and the expression of a proinflammatory cytokine, tumor necrosis factor-α, were markedly attenuated. Moreover, cell proliferative signaling, such as extracellular signal-regulated kinase phosphorylation, was significantly attenuated in ATIP1-Tg mice compared with WT mice. Taken together, these results suggest that ATIP1 plays an important role in cuff-induced vascular remodeling in mice.
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Affiliation(s)
- Teppei Fujita
- From the Departments of Molecular Cardiovascular Biology and Pharmacology (T.F., M.M., L-J.M., J.I., K.T., A.S., M.I., M.H.) and Integrated Medicine and Informatics (H.O., J.H.), Ehime University Graduate School of Medicine, Ehime, Japan; and the Institut Cochin (C.N.), Université Paris Descartes, Paris, France
| | - Masaki Mogi
- From the Departments of Molecular Cardiovascular Biology and Pharmacology (T.F., M.M., L-J.M., J.I., K.T., A.S., M.I., M.H.) and Integrated Medicine and Informatics (H.O., J.H.), Ehime University Graduate School of Medicine, Ehime, Japan; and the Institut Cochin (C.N.), Université Paris Descartes, Paris, France
| | - Li-Juan Min
- From the Departments of Molecular Cardiovascular Biology and Pharmacology (T.F., M.M., L-J.M., J.I., K.T., A.S., M.I., M.H.) and Integrated Medicine and Informatics (H.O., J.H.), Ehime University Graduate School of Medicine, Ehime, Japan; and the Institut Cochin (C.N.), Université Paris Descartes, Paris, France
| | - Jun Iwanami
- From the Departments of Molecular Cardiovascular Biology and Pharmacology (T.F., M.M., L-J.M., J.I., K.T., A.S., M.I., M.H.) and Integrated Medicine and Informatics (H.O., J.H.), Ehime University Graduate School of Medicine, Ehime, Japan; and the Institut Cochin (C.N.), Université Paris Descartes, Paris, France
| | - Kana Tsukuda
- From the Departments of Molecular Cardiovascular Biology and Pharmacology (T.F., M.M., L-J.M., J.I., K.T., A.S., M.I., M.H.) and Integrated Medicine and Informatics (H.O., J.H.), Ehime University Graduate School of Medicine, Ehime, Japan; and the Institut Cochin (C.N.), Université Paris Descartes, Paris, France
| | - Akiko Sakata
- From the Departments of Molecular Cardiovascular Biology and Pharmacology (T.F., M.M., L-J.M., J.I., K.T., A.S., M.I., M.H.) and Integrated Medicine and Informatics (H.O., J.H.), Ehime University Graduate School of Medicine, Ehime, Japan; and the Institut Cochin (C.N.), Université Paris Descartes, Paris, France
| | - Hideki Okayama
- From the Departments of Molecular Cardiovascular Biology and Pharmacology (T.F., M.M., L-J.M., J.I., K.T., A.S., M.I., M.H.) and Integrated Medicine and Informatics (H.O., J.H.), Ehime University Graduate School of Medicine, Ehime, Japan; and the Institut Cochin (C.N.), Université Paris Descartes, Paris, France
| | - Masaru Iwai
- From the Departments of Molecular Cardiovascular Biology and Pharmacology (T.F., M.M., L-J.M., J.I., K.T., A.S., M.I., M.H.) and Integrated Medicine and Informatics (H.O., J.H.), Ehime University Graduate School of Medicine, Ehime, Japan; and the Institut Cochin (C.N.), Université Paris Descartes, Paris, France
| | - Clara Nahmias
- From the Departments of Molecular Cardiovascular Biology and Pharmacology (T.F., M.M., L-J.M., J.I., K.T., A.S., M.I., M.H.) and Integrated Medicine and Informatics (H.O., J.H.), Ehime University Graduate School of Medicine, Ehime, Japan; and the Institut Cochin (C.N.), Université Paris Descartes, Paris, France
| | - Jitsuo Higaki
- From the Departments of Molecular Cardiovascular Biology and Pharmacology (T.F., M.M., L-J.M., J.I., K.T., A.S., M.I., M.H.) and Integrated Medicine and Informatics (H.O., J.H.), Ehime University Graduate School of Medicine, Ehime, Japan; and the Institut Cochin (C.N.), Université Paris Descartes, Paris, France
| | - Masatsugu Horiuchi
- From the Departments of Molecular Cardiovascular Biology and Pharmacology (T.F., M.M., L-J.M., J.I., K.T., A.S., M.I., M.H.) and Integrated Medicine and Informatics (H.O., J.H.), Ehime University Graduate School of Medicine, Ehime, Japan; and the Institut Cochin (C.N.), Université Paris Descartes, Paris, France
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Sridhar S, Schwartz R. A human genome-wide library of local phylogeny predictions for whole-genome inference problems. BMC Genomics 2008; 9:389. [PMID: 18710563 DOI: 10.1186/1471-2164-9-389] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2008] [Accepted: 08/18/2008] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Many common inference problems in computational genetics depend on inferring aspects of the evolutionary history of a data set given a set of observed modern sequences. Detailed predictions of the full phylogenies are therefore of value in improving our ability to make further inferences about population history and sources of genetic variation. Making phylogenetic predictions on the scale needed for whole-genome analysis is, however, extremely computationally demanding. RESULTS In order to facilitate phylogeny-based predictions on a genomic scale, we develop a library of maximum parsimony phylogenies within local regions spanning all autosomal human chromosomes based on Haplotype Map variation data. We demonstrate the utility of this library for population genetic inferences by examining a tree statistic we call 'imperfection,' which measures the reuse of variant sites within a phylogeny. This statistic is significantly predictive of recombination rate, shows additional regional and population-specific conservation, and allows us to identify outlier genes likely to have experienced unusual amounts of variation in recent human history. CONCLUSION Recent theoretical advances in algorithms for phylogenetic tree reconstruction have made it possible to perform large-scale inferences of local maximum parsimony phylogenies from single nucleotide polymorphism (SNP) data. As results from the imperfection statistic demonstrate, phylogeny predictions encode substantial information useful for detecting genomic features and population history. This data set should serve as a platform for many kinds of inferences one may wish to make about human population history and genetic variation.
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Ye H, Pungpravat N, Huang BL, Muzio LL, Mariggiò MA, Chen Z, Wong DT, Zhou X. Genomic assessments of the frequent loss of heterozygosity region on 8p21.3-p22 in head and neck squamous cell carcinoma. ACTA ACUST UNITED AC 2008; 176:100-6. [PMID: 17656251 PMCID: PMC2000851 DOI: 10.1016/j.cancergencyto.2007.04.003] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2007] [Revised: 03/29/2007] [Accepted: 04/02/2007] [Indexed: 01/01/2023]
Abstract
Most human cancers are characterized by genetic instabilities. Chromosomal aberrations include segments of allelic imbalance identifiable by loss of heterozygosity (LOH) at polymorphic loci, which may be used to implicate regions harboring tumor suppressor genes. Here we performed whole-genome LOH profiling on 41 human head and neck squamous cell carcinoma (HNSCC) cell lines. Several frequent LOH regions were identified on chromosomal arms 3p, 4p, 4q, 5q, 8p, 9p, 10p, 11q, and 17p. A genomic region of approximately 7 Mb located at 8p21.3 approximately p22 exhibits the most frequent LOH (87.9%), which suggests that this region harbors one or more important tumor suppressor genes. Mitochondrial tumor suppressor gene 1 (MTUS1) is a recently identified candidate tumor suppressor gene that resides in this region. Consistent downregulation in expression was observed in HNSCC for MTUS1 as measured by real-time quantitative reverse transcriptase-polymerase chain reaction. Sequence analysis of MTUS1 gene in HNSCC revealed several important sequence variants in the exon regions of this gene. Thus, our results suggest that MTUS1 is one of the candidate tumor suppressor genes for HNSCC residing at 8p21.3 approximately p22. The identification of these candidate genes will facilitate the understanding of tumorigenesis of HNSCC.
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Affiliation(s)
- Hui Ye
- Center for Molecular Biology of Oral Diseases, College of Dentistry, University of Illinois at Chicago, MC860, 801 South Paulina Street, Room 530C, Chicago, IL 60612-7213, USA
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Abstract
Angiotensin (Ang) II exerts its important physiological functions through 2 distinct receptor subtypes, type 1 (AT
1
) and type 2 (AT
2
) receptors. Recently, new evidence has accumulated showing the existence of several novel receptor interacting proteins and various angiotensin II receptor activation mechanisms beyond the classical actions of receptors for Ang II. These associated proteins could contribute not only to Ang II receptors’ functions, but also to influencing pathophysiological states. Receptor dimerization of Ang II receptors such as homodimer, heterodimer, and complex formation with other G protein-coupled receptors has also been focused on as a new mechanism of their activation or inactivation. Moreover, ligand-independent receptor activation systems such as mechanical stretch for the AT
1
receptor have also been revealed. These emerging concepts of regulation of Ang II receptors and a new insight into future drug discovery are discussed in this review.
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MESH Headings
- Adaptor Proteins, Signal Transducing/metabolism
- Angiotensin II/metabolism
- Angiotensin II Type 1 Receptor Blockers/pharmacology
- Angiotensin II Type 1 Receptor Blockers/therapeutic use
- Animals
- Antihypertensive Agents/pharmacology
- Antihypertensive Agents/therapeutic use
- Autoantibodies/metabolism
- Dimerization
- Drug Inverse Agonism
- GTP-Binding Proteins/metabolism
- Humans
- Hypertension/drug therapy
- Hypertension/metabolism
- Kruppel-Like Transcription Factors/metabolism
- Ligands
- Membrane Transport Proteins/metabolism
- Multiprotein Complexes/metabolism
- Protein Conformation
- Protein Tyrosine Phosphatase, Non-Receptor Type 6/metabolism
- Receptor, Angiotensin, Type 1/chemistry
- Receptor, Angiotensin, Type 1/drug effects
- Receptor, Angiotensin, Type 1/immunology
- Receptor, Angiotensin, Type 1/metabolism
- Receptor, Angiotensin, Type 2/agonists
- Receptor, Angiotensin, Type 2/chemistry
- Receptor, Angiotensin, Type 2/metabolism
- Signal Transduction/drug effects
- Tumor Suppressor Proteins/metabolism
- Ubiquitin-Conjugating Enzymes/metabolism
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Affiliation(s)
- Masaki Mogi
- FAHA, Professor and Chairman, Department of Molecular Cardiovascular Biology and Pharmacology, Ehime University, Graduate School of Medicine, Shitsukawa, Tohon, Ehime 791-0295, Japan
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36
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Abstract
AIMS/BACKGROUND Loss of heterozygosity (LOH) at 8p is the most frequent chromosomal alteration in tumorigenesis of human cancers. However, the genetic change in metastasis of hepatocellular carcinoma (HCC) still has to be investigated. METHODS We used 16 microsatellite markers informative in Japanese patients, selected from among 61 published microsatellite markers at 8p23.2-21 to compare the frequency of LOH in primary tumours (Tps) and metastatic tumours (Tms) in a PCR-based analysis. Sixty-three informative cancerous lesions (26 were Tps, 37 were Tms) from 23 cases of HCC were used. RESULTS The frequency of LOH at 8p23.2-21 with at least one marker was 19% in Tps and 68% in Tms. Allelic loss at 8p23.2-21 was significantly more frequent in Tms than in Tps (P=0.0003). More specifically, the frequency of LOH at D8S262, D8S1819, D8S503, D8S1130, D8S552, D8S1109, and D8S261 in Tms was 36-60% respectively. CONCLUSIONS In contrast, allelic loss at the same markers in Tp was only detected in 0-17% of the tumour respectively. The significant difference in the frequency of LOH at 8p between primary cancer and metastatic cancer in individual cases of HCC suggests LOH at 8p to be involved in the enhancement of tumour aggressiveness, especially during metastasis.
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Affiliation(s)
- Tomoe Lu
- Department of Pathology, Jikei University School of Medicine, Tokyo, Japan.
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37
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Hosseini HA, Ahani A, Galehdari H, Froughmand AM, Hosseini M, Masjedizadeh A, Zali MR. Frequent loss of heterozygosity at 8p22 chromosomal region in diffuse type of gastric cancer. World J Gastroenterol 2007; 13:3354-8. [PMID: 17659675 PMCID: PMC4172716 DOI: 10.3748/wjg.v13.i24.3354] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To study the loss of heterozygosity (LOH) at 8p21-23 locus in diffuse gastric cancer.
METHODS: To evaluate the involvement of this region in gastric cancer, we used eight microsatellite markers covering two Mb of mentioned region, to perform a high-resolution analysis of allele loss in 42 cases of late diffuse gastric adenocarcinoma.
RESULTS: Six of these STS makers: D8S1149, D8S1645, D8S1643, D8S1508, D8S1591, and D8S1145 showed 36%, 28%, 37%, 41%, 44% and 53% LOH, respectively.
CONCLUSION: A critical region of loss, close to the NAT2 locus and relatively far from FEZ1 gene currently postulated as tumor suppressor gene in this region.
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38
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Abstract
AIM: To identify the precise location of putative tumor suppressor genes (TSGs) on the short arm of chromosome 8 in patients with hepatocellular carcinoma (HCC).
METHODS: We used 16 microsatellite markers informative in Japanese patients, which were selected from 61 published markers, on 8p, to analyze the frequency of loss of heterozygosity (LOH) in each region in 33 cases (56 lesions) of HCC.
RESULTS: The frequency of LOH at 8p23.2-21 with at least one marker was 63% (20/32) in the informative cases. More specifically, the frequency of LOH at 8p23.2, 8p23.1, 8p22, and 8p21 was 6%, 52%, 47%, and 13% in HCC cases. The LOH was significantly more frequent at 8p23.1 and 8p22 than the average (52% vs 22%, P = 0.0008; and 47% vs 22%, P = 0.004, respectively) or others sites, such as 8p23.2 (52% vs 6%, P = 0.003; 47% vs 22%, P = 0.004) and 8p21 (52% vs 13%, P = 0.001; 47% vs 13%, P = 0.005) in liver cancer on the basis of cases. Notably, LOH frequency was significantly higher at D8S277, D8S503, D8S1130, D8S552, D8S254 and D8S258 than at the other sites. However, no allelic loss was detected at any marker on 8p in the lesions of nontumor liver tissues.
CONCLUSION: Deletion of 8p, especially the loss of 8p23.1-22, is an important event in the initiation or promotion of HCC. Our results should be useful in identifying critical genes that might lie at 8p23.1-22.
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Affiliation(s)
- Tomoe Lu
- Department of Pathology, The Jikei University School of Medicine, Tokyo 105-8461, Japan.
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39
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Frank B, Bermejo JL, Hemminki K, Sutter C, Wappenschmidt B, Meindl A, Kiechle-Bahat M, Bugert P, Schmutzler RK, Bartram CR, Burwinkel B. Copy number variant in the candidate tumor suppressor gene MTUS1 and familial breast cancer risk. Carcinogenesis 2007; 28:1442-5. [PMID: 17301065 DOI: 10.1093/carcin/bgm033] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Copy number variants (CNVs), insertions, deletions and duplications, contribute considerably to human genetic variation and disease development. A recent study has characterized 100 CNVs including a deletion in the mitochondrial tumor suppressor gene 1 (MTUS1) lacking the coding exon 4. MTUS1 maps to chromosome 8p, a region frequently deleted and associated with disease progression in human cancers, including breast cancer (BC). To investigate the effect of the MTUS1 CNV on familial BC risk, we analyzed 593 BC patients and 732 control individuals using a case-control study design. We found a significant association of the deletion variant with a decreased risk for both familial and high-risk familial BC (odds ratio (OR) = 0.58, 95% confidence interval (CI) = 0.37-0.90, P = 0.01 and OR = 0.41, 95% CI = 0.23-0.74, P = 0.003), supporting its role in human cancer. To our knowledge, the present study is the first to determine the impact of a CNV in a tumor suppressor gene on cancer risk.
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Affiliation(s)
- Bernd Frank
- Division of Molecular Genetic Epidemiology, Helmholtz-University Group Molecular Epidemiology, German Cancer Research Center, DKFZ, Heidelberg, Germany.
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40
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Di Benedetto M, Bièche I, Deshayes F, Vacher S, Nouet S, Collura V, Seitz I, Louis S, Pineau P, Amsellem-Ouazana D, Couraud PO, Strosberg AD, Stoppa-Lyonnet D, Lidereau R, Nahmias C. Structural organization and expression of human MTUS1, a candidate 8p22 tumor suppressor gene encoding a family of angiotensin II AT2 receptor-interacting proteins, ATIP. Gene 2006; 380:127-36. [PMID: 16887298 DOI: 10.1016/j.gene.2006.05.021] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2006] [Revised: 05/05/2006] [Accepted: 05/18/2006] [Indexed: 10/24/2022]
Abstract
The Mitochondrial Tumor suppressor 1 (MTUS1) gene is a newly identified candidate tumor suppressor gene at chromosomal position 8p22. We report here that MTUS1 encodes a family of proteins whose leader member (ATIP1) was previously isolated in our laboratory as a novel interacting partner of the angiotensin II AT2 receptor involved in growth inhibition (Nouet, JBC 279: 28989-97, 2004). The MTUS1 gene contains 17 coding exons distributed over 112 kb of genomic DNA. Alternative exon usage generates three major transcripts (ATIP1, ATIP3 and ATIP4), each showing different tissue distribution. ATIP polypeptides are identical in their carboxy-terminal region carrying four coiled-coil domains. In their amino-terminal portion, ATIP polypeptides exhibit distinct motifs for localisation in the cytosol, nucleus or cell membrane, suggesting that MTUS1 gene products may be involved in a variety of intracellular functions in an AT2-dependent and independent manner. ATIP1 is ubiquitous and highly expressed in the brain. ATIP3 is the major transcript in tissues (prostate, bladder, breast, ovary, colon) corresponding to cancer types with frequent loss of heterozygosity at 8p22. Interestingly, ATIP4 is a brain-specific transcript highly abundant in the cerebellum and fetal brain. High evolutionary conservation of ATIP amino-acid sequences suggests important biological roles for this new family of proteins in tumor suppression and/or brain function.
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Affiliation(s)
- M Di Benedetto
- Institut Cochin, Département de Biologie Cellulaire, Paris, F-75014, France
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