1
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Gao Y, Fang Y, Huang Y, Ma R, Chen X, Wang F, Pei X, Gao Y, Chen X, Liu X, Shan J, Li P. MIIP functions as a novel ligand for ITGB3 to inhibit angiogenesis and tumorigenesis of triple-negative breast cancer. Cell Death Dis 2022; 13:810. [PMID: 36130933 PMCID: PMC9492696 DOI: 10.1038/s41419-022-05255-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Revised: 09/07/2022] [Accepted: 09/09/2022] [Indexed: 01/23/2023]
Abstract
Migration and invasion inhibitory protein (MIIP) has been identified as a tumor suppressor in various cancer types. Although MIIP is reported to exert tumor suppressive functions by repressing proliferation and metastasis of cancer cells, the detailed mechanism is poorly understood. In the present study, we found MIIP is a favorable indicator of prognosis in triple-negative breast cancer. MIIP could inhibit tumor angiogenesis, proliferation, and metastasis of triple-negative breast cancer cells in vivo and in vitro. Mechanistically, MIIP directly interacted with ITGB3 and suppressed its downstream signaling. As a result, β-catenin was reduced due to elevated ubiquitin-mediated degradation, leading to downregulated VEGFA production and epithelial mesenchymal transition. More importantly, we found RGD motif is essential for MIIP binding with ITGB3 and executing efficient tumor-suppressing effect. Our findings unravel a novel mechanism by which MIIP suppresses tumorigenesis in triple-negative breast cancer, and MIIP is thus a promising molecular biomarker or therapeutic target for the disease.
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Affiliation(s)
- Yujing Gao
- grid.412194.b0000 0004 1761 9803National Health Commission Key Laboratory of Metabolic Cardiovascular Diseases Research, Ningxia Medical University, Yinchuan, China ,grid.412194.b0000 0004 1761 9803Key Laboratory of Fertility Preservation and Maintenance of Ministry of Education, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Ningxia Medical University, Yinchuan, China ,grid.412194.b0000 0004 1761 9803Ningxia Key Laboratory of Vascular Injury and Repair Research, Ningxia Medical University, Yinchuan, China
| | - Yujie Fang
- grid.412194.b0000 0004 1761 9803National Health Commission Key Laboratory of Metabolic Cardiovascular Diseases Research, Ningxia Medical University, Yinchuan, China ,grid.412194.b0000 0004 1761 9803Key Laboratory of Fertility Preservation and Maintenance of Ministry of Education, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Ningxia Medical University, Yinchuan, China
| | - Yongli Huang
- grid.412194.b0000 0004 1761 9803National Health Commission Key Laboratory of Metabolic Cardiovascular Diseases Research, Ningxia Medical University, Yinchuan, China ,grid.412194.b0000 0004 1761 9803Key Laboratory of Fertility Preservation and Maintenance of Ministry of Education, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Ningxia Medical University, Yinchuan, China
| | - Rui Ma
- grid.412194.b0000 0004 1761 9803Key Laboratory of Fertility Preservation and Maintenance of Ministry of Education, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Ningxia Medical University, Yinchuan, China
| | - Xixi Chen
- grid.412277.50000 0004 1760 6738Department of Pediatrics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Fang Wang
- grid.413385.80000 0004 1799 1445Department of Gastroenterology, General Hospital of Ningxia Medical University, Yinchuan, China
| | - Xiuying Pei
- grid.412194.b0000 0004 1761 9803Key Laboratory of Fertility Preservation and Maintenance of Ministry of Education, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Ningxia Medical University, Yinchuan, China
| | - Yuanqi Gao
- grid.412277.50000 0004 1760 6738Department of Pediatrics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xuehua Chen
- grid.412277.50000 0004 1760 6738Department of Pediatrics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xinrui Liu
- grid.412194.b0000 0004 1761 9803Key Laboratory of Fertility Preservation and Maintenance of Ministry of Education, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Ningxia Medical University, Yinchuan, China
| | - Jingxuan Shan
- grid.5386.8000000041936877XDepartment of Genetic Medicine, Weill Cornell Medicine, New York, NY USA
| | - Pu Li
- grid.412277.50000 0004 1760 6738Department of Pediatrics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
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2
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Upregulation of MIIP regulates human breast cancer proliferation, invasion and migration by mediated by IGFBP2. Pathol Res Pract 2019; 215:152440. [PMID: 31078343 DOI: 10.1016/j.prp.2019.152440] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Revised: 04/28/2019] [Accepted: 05/05/2019] [Indexed: 01/07/2023]
Abstract
AIMS The migration and invasion inhibitory protein (MIIP) was initially discovered in a yeast two-hybrid screen for proteins that interact and inhibit the migration and invasion-promoting protein insulin-like growth factor binding protein 2 (IGFBP2). This study aims to evaluate the biological effects of MIIP in breast cancer by targeting IGFBP2. MATERIALS AND METHODS Reverse transcription quantitative real-time polymerase chain reaction and Western blotting were used to evaluate the abnormal expression of MIIP and IGFBP2 in breast cancer tissue or breast cancer cell lines. Transfection assay was used to overexpress MIIP protein in breast cancer cells. MTT assay and colony formation assay were used to detect cell viability of breast cancer cells after MIIP overexpression. Transwell and wound-healing assays were used to detect cell invasion and migration after MIIP overexpression. RESULTS MIIP was significantly decreased and IGFBP2 was significantly increased in breast cancer tissues versus para cancerous. Breast cancer tissues of HER2 overexpression and Basal-like were more significant than Luminal A and Luminal B. MIIP was obviously downregulated and IGFBP2 was upregulated in MDA-MB-231, SKBR3 and MCF-7 versus MCF-10A especially in MDA-MB-231. Cell proliferation, cell migration and cell invasion were significantly inhibited after overexpression of MIIP. IGFBP2 was downregulated after overexpression of MIIP. The effects of MIIP on cell proliferation, cell migration and invasion were significantly reversed by IGFBP2. CONCLUSION The abnormal expression of MIIP in breast cancer affects the cell biological effects. IGFBP2 was regulated via MIIP which may be associated with these biological effects. These results reveal that MIIP can be a potential target for breast cancer treatment.
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3
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Sun D, Wang Y, Jiang S, Wang G, Xin Y. MIIP is downregulated in gastric cancer and its forced expression inhibits proliferation and invasion of gastric cancer cells in vitro and in vivo. Onco Targets Ther 2018; 11:8951-8964. [PMID: 30588008 PMCID: PMC6294070 DOI: 10.2147/ott.s173393] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Background MIIP is associated with cancer progression in various cancers. However, its expression pattern, and associated molecular mechanisms in gastric cancer (GC) progression are still mysterious. We aimed to explore the role of MIIP in proliferation and invasion of GC. Materials and methods MIIP expression was evaluated in human GC tissues and cell lines. Public clinical database of GC patients was used to probe the correlation between MIIP expression and prognosis of patients. The effects of forced MIIP expression on GC cells were determined by MTT, cell cycle distribution, colony formation, wound-healing and Transwell assays in vitro, as well as in vivo growth of subcutaneous tumor xenografts and metastasis of xenografted tumors to the lungs in mice. The expressions of GC progression-associated genes, including HOTAIR, MALAT1, HDAC6, AC-tubulin, and cyclin D1, were assessed by Western blotting or qRT-PCR. Results Both GC tissues and GC cell lines had lower MIIP expression. Higher level of MIIP in GC tissues predicts better survival in patients. Ectopic expression of MIIP in GC cell lines BGC823 and HGC27 induced G0/G1 cell cycle arrest and inhibited cell proliferation, colony formation, migration and invasion in vitro, as well as the growth of GC xenografts and metastasis of tumors in vivo. Furthermore, overexpression of MIIP suppressed mRNA expressions of HOTAIR and MALAT1, decreased protein expression of HDAC6 and cyclin D1, and elevated AC-tubulin protein expression. Conclusion MIIP is a suppressor for GC progression and is a potential therapeutic target for treating GC.
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Affiliation(s)
- Dan Sun
- Laboratory of Gastrointestinal Onco-Pathology, Cancer Institute, The First Affiliated Hospital of China Medical University, Shenyang 110001, Liaoning Province, China,
| | - Yiwei Wang
- Laboratory of Gastrointestinal Onco-Pathology, Cancer Institute, The First Affiliated Hospital of China Medical University, Shenyang 110001, Liaoning Province, China,
| | - Shanshan Jiang
- Laboratory of Gastrointestinal Onco-Pathology, Cancer Institute, The First Affiliated Hospital of China Medical University, Shenyang 110001, Liaoning Province, China,
| | - Gang Wang
- Laboratory of Gastrointestinal Onco-Pathology, Cancer Institute, The First Affiliated Hospital of China Medical University, Shenyang 110001, Liaoning Province, China,
| | - Yan Xin
- Laboratory of Gastrointestinal Onco-Pathology, Cancer Institute, The First Affiliated Hospital of China Medical University, Shenyang 110001, Liaoning Province, China,
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Zhou HP, Qian LX, Zhang N, Gu JJ, Ding K, Wu J, Lu ZW, Du MY, Zhu HM, Wu JZ, He X, Yin L. MIIP gene expression is associated with radiosensitivity in human nasopharyngeal carcinoma cells. Oncol Lett 2018; 15:9471-9479. [PMID: 29805670 DOI: 10.3892/ol.2018.8524] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2017] [Accepted: 02/07/2018] [Indexed: 12/17/2022] Open
Abstract
The present study aims to investigate the radiosensitization effect of the migration and invasion inhibitory protein (MIIP) gene on nasopharyngeal carcinoma (NPC) cells. The MIIP gene was transfected into NPC 5-8F and CNE2 cells. The level of MIIP was analyzed by quantitative reverse transcription-polymerase chain reaction analysis and western blot. The changes in radiosensitivity of the cells were analyzed by colony formation assay. The changes in cell apoptosis and cycle distribution following irradiation were detected by flow cytometry. The expression of BCL2 associated X, apoptosis regulator/B-cell lymphoma 2 was evaluated using western blot. DNA damage was analyzed by counting γ-H2AX foci. The expression levels of γ-H2AX were evaluated by immunofluorescence and western blot. In a previous study by the authors, the results indicated that the expression of MIIP gene evidently increased in MIIP-transfected 5-8F (5-8F OE) and MIIP-transfected CNE2 (CNE2 OE) cells compared with the parental or negative control cells. In the present study, the survival rate of 5-8F OE and CNE2 OE cells markedly decreased following irradiation (0, 2, 4, 6 and 8 Gy) compared with the negative control (5-8F NC and CNE2 NC) and the untreated (5-8F and CNE2) groups. The expression of MIIP was able to increase apoptosis, which resulted in G2/M cell cycle arrest and DNA damage repair was attenuated in 5-8F and CNE2 cells following irradiation as measured by the accumulation of γ-H2AX. It was indicated that MIIP expression is associated with the radiosensitivity of NPC cells and has a significant role in regulating cell radiosensitivity.
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Affiliation(s)
- Hong-Ping Zhou
- The Fourth School of Clinical Medicine, Nanjing Medical University, Nanjing, Jiangsu 210000, P.R. China.,Department of Radiation Oncology, BenQ Medical Center, The Affiliated BenQ Hospital of Nanjing Medical University, Nanjing, Jiangsu 210000, P.R. China
| | - Lu-Xi Qian
- The Fourth School of Clinical Medicine, Nanjing Medical University, Nanjing, Jiangsu 210000, P.R. China.,Department of Radiation Oncology, Jiangsu Cancer Hospital, Jiangsu Institute of Cancer Research, Nanjing Medical University Affiliated Cancer Hospital, Nanjing, Jiangsu 210000, P.R. China
| | - Nan Zhang
- Department of Radiation Oncology, Jiangsu Cancer Hospital, Jiangsu Institute of Cancer Research, Nanjing Medical University Affiliated Cancer Hospital, Nanjing, Jiangsu 210000, P.R. China
| | - Jia-Jia Gu
- Department of Radiation Oncology, Jiangsu Cancer Hospital, Jiangsu Institute of Cancer Research, Nanjing Medical University Affiliated Cancer Hospital, Nanjing, Jiangsu 210000, P.R. China
| | - Kai Ding
- Department of Radiation Oncology, Suqian First Hospital, Suqian, Jiangsu 223800, P.R. China
| | - Jing Wu
- Department of Radiation Oncology, Jiangsu Cancer Hospital, Jiangsu Institute of Cancer Research, Nanjing Medical University Affiliated Cancer Hospital, Nanjing, Jiangsu 210000, P.R. China
| | - Zhi-Wei Lu
- The Fourth School of Clinical Medicine, Nanjing Medical University, Nanjing, Jiangsu 210000, P.R. China.,Department of Radiation Oncology, Jiangsu Cancer Hospital, Jiangsu Institute of Cancer Research, Nanjing Medical University Affiliated Cancer Hospital, Nanjing, Jiangsu 210000, P.R. China
| | - Ming-Yu Du
- Department of Radiation Oncology, Jiangsu Cancer Hospital, Jiangsu Institute of Cancer Research, Nanjing Medical University Affiliated Cancer Hospital, Nanjing, Jiangsu 210000, P.R. China
| | - Hong-Ming Zhu
- Department of Radiation Oncology, Jiangsu Cancer Hospital, Jiangsu Institute of Cancer Research, Nanjing Medical University Affiliated Cancer Hospital, Nanjing, Jiangsu 210000, P.R. China
| | - Jian-Zhong Wu
- Department of Radiation Oncology, Jiangsu Cancer Hospital, Jiangsu Institute of Cancer Research, Nanjing Medical University Affiliated Cancer Hospital, Nanjing, Jiangsu 210000, P.R. China.,Jiangsu Key Laboratory of Molecular and Translational Cancer Research, Jiangsu Cancer Hospital, Nanjing, Jiangsu 210000, P.R. China
| | - Xia He
- The Fourth School of Clinical Medicine, Nanjing Medical University, Nanjing, Jiangsu 210000, P.R. China.,Department of Radiation Oncology, Jiangsu Cancer Hospital, Jiangsu Institute of Cancer Research, Nanjing Medical University Affiliated Cancer Hospital, Nanjing, Jiangsu 210000, P.R. China
| | - Li Yin
- The Fourth School of Clinical Medicine, Nanjing Medical University, Nanjing, Jiangsu 210000, P.R. China.,Department of Radiation Oncology, Jiangsu Cancer Hospital, Jiangsu Institute of Cancer Research, Nanjing Medical University Affiliated Cancer Hospital, Nanjing, Jiangsu 210000, P.R. China
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MiRNA-646-mediated reciprocal repression between HIF-1α and MIIP contributes to tumorigenesis of pancreatic cancer. Oncogene 2018; 37:1743-1758. [PMID: 29343850 DOI: 10.1038/s41388-017-0082-2] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2017] [Revised: 10/23/2017] [Accepted: 11/24/2017] [Indexed: 12/19/2022]
Abstract
Migration and invasion inhibitory protein (MIIP) is recently identified as an inhibitor in tumor development. However, the regulatory mechanism and biological contributions of MIIP in pancreatic cancer (PC) have been not elucidated. In this study, we demonstrated a negative feedback of MIIP and hypoxia-induced factor-1α (HIF-1α), which was mediated by a hypoxia-induced microRNA. Compared with paracarcinoma tissues, MIIP was downregulated in PC tissues. Overexpression of MIIP significantly impeded the proliferation and invasion of PC cells both in vitro and in mouse xenograft models. We further verified MIIP was downregulated under hypoxia in a HIF-1α-mediated manner. Interestingly, although MIIP promoter containing two putative hypoxia response elements (HREs), the chromatin immunoprecipitation (ChIP) and luciferase reporter assays did not support an active interaction between HIF-1α and MIIP promoter. Meanwhile, microRNA array revealed a hypoxia-induced microRNA, miR-646, impaired stability of MIIP mRNA and consequently inhibited its expression by targeting the coding sequence (CDS). Coincidently, knockdown of miR-646 significantly repressed proliferation and invasion ability of PC cells both in vitro and in vivo by upregulating MIIP expression. Besides, ChIP and luciferase reporter assays further validated that HIF-1α activated transcription of miR-646 in hypoxia condition. Therefore, these results suggested HIF-1α indirectly regulated MIIP expression in post-transcriptional level through upregulating miR-646 transcription. Conversely, our results further revealed that MIIP suppressed deacetylase ability of histone deacetylase 6 (HDAC6) to promote the acetylation and degradation of HIF-1α, by which impairing HIF-1α accumulation. What is more, a specific relationship between downregulated MIIP and upregulated miR-646 expression was validated in PC samples. Moreover, the dysregulated miR-646 and MIIP expression was correlated with advanced tumor stage, lymphatic invasion, metastasis and shorter overall survival in PC patients. Together, our results highlight that the reciprocal loop of HIF-1α/miR-646/MIIP might be implemented as an applicable target for pancreatic cancer therapy.
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6
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Kim D, Shivakumar M, Han S, Sinclair MS, Lee YJ, Zheng Y, Olopade OI, Kim D, Lee Y. Population-dependent Intron Retention and DNA Methylation in Breast Cancer. Mol Cancer Res 2018; 16:461-469. [PMID: 29330282 DOI: 10.1158/1541-7786.mcr-17-0227] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2017] [Revised: 09/15/2017] [Accepted: 11/27/2017] [Indexed: 12/31/2022]
Abstract
Regulation of gene expression by DNA methylation in gene promoter regions is well studied; however, the effects of methylation in the gene body (exons and introns) on gene expression are comparatively understudied. Recently, hypermethylation has been implicated in the inclusion of alternatively spliced exons; moreover, exon recognition can be enhanced by recruiting the methyl-CpG-binding protein (MeCP2) to hypermethylated sites. This study examines whether the methylation status of an intron is correlated with how frequently the intron is retained during splicing using DNA methylation and RNA sequencing data from breast cancer tissue specimens in The Cancer Genome Atlas. Interestingly, hypomethylation of introns is correlated with higher levels of intron expression in mRNA and the methylation level of an intron is inversely correlated with its retention in mRNA from the gene in which it is located. Furthermore, significant population differences were observed in the methylation level of retained introns. In African-American donors, retained introns were not only less methylated compared to European-American donors, but also were more highly expressed. This underscores the need for understanding epigenetic differences in populations and their correlation with breast cancer is an important step toward achieving personalized cancer care.Implications: This research contributes to the understanding of how epigenetic markers in the gene body communicate with the transcriptional machinery to control transcript diversity and differential biological response to changes in methylation status could underlie some of the known, yet unexplained, disparities in certain breast cancer patient populations. Mol Cancer Res; 16(3); 461-9. ©2018 AACR.
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Affiliation(s)
- Dongwook Kim
- Department of Biomedical Informatics, University of Utah School of Medicine, Salt Lake City, Utah
| | - Manu Shivakumar
- Department of Biomedical and Translational Informatics, Geisinger Health System, Danville, Pennsylvania
| | - Seonggyun Han
- Department of Biomedical Informatics, University of Utah School of Medicine, Salt Lake City, Utah
| | - Michael S Sinclair
- Department of Biomedical Informatics, University of Utah School of Medicine, Salt Lake City, Utah
| | - Young-Ji Lee
- Department of Health and Community Systems, University of Pittsburgh School of Nursing, Pittsburgh, Pennsylvania
| | - Yonglan Zheng
- Department of Medicine, University of Chicago, Chicago, Illinois
| | | | - Dokyoon Kim
- Department of Biomedical and Translational Informatics, Geisinger Health System, Danville, Pennsylvania.
- The Huck Institutes of the Life Sciences, Pennsylvania State University, University Park, Pennsylvania
| | - Younghee Lee
- Department of Biomedical Informatics, University of Utah School of Medicine, Salt Lake City, Utah.
- Huntsman Cancer Institute, Salt Lake City, Utah
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MIIP accelerates epidermal growth factor receptor protein turnover and attenuates proliferation in non-small cell lung cancer. Oncotarget 2016; 7:9118-34. [PMID: 26824318 PMCID: PMC4891030 DOI: 10.18632/oncotarget.7001] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2015] [Accepted: 01/17/2016] [Indexed: 12/22/2022] Open
Abstract
The migration and invasion inhibitory protein (MIIP) has been discovered recently to have inhibitory functions in cell proliferation and migration. Overexpression of MIIP reduced the intracellular steady-state level of epidermal growth factor receptor (EGFR) protein in lung cancer cells with no effect on EGFR mRNA expression compared to that in the control cells. This MIIP-promoted EGFR protein degradation was reversed by proteasome and lysosome inhibitors, suggesting the involvement of both proteasomal and lysosomal pathways in this degradation. This finding was further validated by pulse-chase experiments using 35S-methionine metabolic labeling. We found that MIIP accelerates EGFR protein turnover via proteasomal degradation in the endoplasmic reticulum and then via the lysosomal pathway after its entry into endocytic trafficking. MIIP-stimulated downregulation of EGFR inhibits downstream activation of Ras and blocks the MEK signal transduction pathway, resulting in inhibition of cell proliferation. The negative correlation between MIIP and EGFR protein expression was validated in lung adenocarcinoma samples. Furthermore, the higher MIIP protein expression predicts a better overall survival of Stage IA-IIIA lung adenocarcinoma patients who underwent radical surgery. These findings reveal a new mechanism by which MIIP inhibits cell proliferation.
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8
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Wang Y, Hu L, Ji P, Teng F, Tian W, Liu Y, Cogdell D, Liu J, Sood AK, Broaddus R, Xue F, Zhang W. MIIP remodels Rac1-mediated cytoskeleton structure in suppression of endometrial cancer metastasis. J Hematol Oncol 2016; 9:112. [PMID: 27760566 PMCID: PMC5069779 DOI: 10.1186/s13045-016-0342-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Accepted: 10/08/2016] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Endometrial carcinoma (EC) is one of the most common malignancies of the female reproductive system. Migration and invasion inhibitory protein (MIIP) gene was recently discovered candidate tumor suppress gene which located at chromosome 1p36.22. 1p36 deletion was found in many types of tumor including EC. In the present study, we will determine the role and mechanism of MIIP in EC metastasis. METHODS Immunohistochemistry was used to measure MIIP expression in normal and EC tissue. Both gain-of-function (infection) and loss-of-function (siRNA) assays were used to alter MIIP expression levels. The effect of MIIP on cell migration and invasion was measured by transwell assay. F-actin immunofluorescence staining was used to observe the cell morphology. The activation of GTP-loaded Rac1 was evaluated by Rac activity assay kit. Immunoprecipitation/WB was used to measure the interaction between MIIP and PAK1. RESULTS We demonstrate that MIIP expression was significantly decreased in EC patients comparing to the normal ones, and decreased MIIP expression in EC tissues is associated with deep myometrial invasion, advanced stage, and the presence of lymph node metastasis. Using both gain-of-function (infection) and loss-of-function (siRNA) assays, we show that MIIP markedly blocked EC cell migration, whereas loss of MIIP led to increase in EC cell migration. We demonstrate that elevated expression of MIIP resulted in cytoskeleton reorganization with decreased formation of lamellipodia. We also provide evidence that MIIP is a key molecule in directing Rac1 signaling cascades in EC. Ectopically expressed MIIP consistently competed with Rac1-GTP for binding with the PAK1 p21-binding domain. Our data show that MIIP and PAK1 bind each other and that a C-terminal polyproline domain of MIIP is required for PAK1 binding. Deletion of the PAK1-binding domain of MIIP reduced cell migration-inhibiting activity. CONCLUSIONS MIIP may function as a tumor suppressor gene for endometrial carcinoma. MIIP attenuates Rac1 signaling through a protein interaction network, and loss of this regulator may contribute to EC metastasis.
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Affiliation(s)
- Yingmei Wang
- Department of Gynecology and Obstetrics, Tianjin Medical University General Hospital, Tianjin, China. .,Department of Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA.
| | - Limei Hu
- Department of Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA.,Department of Systems Biology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Ping Ji
- Department of Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA.,Present Address: Department of Biochemistry and Molecular Biology, The University of Texas Medical Branch, Galveston, TX, USA
| | - Fei Teng
- Department of Gynecology and Obstetrics, Tianjin Medical University General Hospital, Tianjin, China
| | - Wenyan Tian
- Department of Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Yuexin Liu
- Department of Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA.,Department of Bioinformatics, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - David Cogdell
- Department of Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Jinsong Liu
- Department of Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Anil K Sood
- Department of Gynecologic Oncology and Reproductive Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX, USA.,Center for RNAi and Non-Coding RNA, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Russell Broaddus
- Department of Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Fengxia Xue
- Department of Gynecology and Obstetrics, Tianjin Medical University General Hospital, Tianjin, China.
| | - Wei Zhang
- Department of Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA. .,Department of Cancer Biology, Comprehensive Cancer Center of Wake Forest Baptist Medical Center, Winston-Salem, NC, 27157, USA.
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9
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Wen J, Liu QW, Luo KJ, Ling YH, Xie XY, Yang H, Hu Y, Fu JH. MIIP expression predicts outcomes of surgically resected esophageal squamous cell carcinomas. Tumour Biol 2016; 37:10141-8. [PMID: 26825982 DOI: 10.1007/s13277-015-4633-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2015] [Accepted: 12/10/2015] [Indexed: 12/13/2022] Open
Abstract
The migration and invasion inhibitory protein (MIIP) was shown to function as a tumor suppressor gene in gliomas by inhibiting tumor cell growth, migration, and invasion. However, its role and clinical significance in esophageal squamous cell carcinoma (ESCC) have not been elucidated. We investigated the correlation of MIIP expression and clinical outcome in a group of surgically resected ESCCs. Tissue microarrays constructed of 253 surgically resected ESCC primary tumors and paired paracancerous normal esophageal epithelia were used for MIIP evaluation by immunohistochemistry. The clinical and prognostic significance of MIIP expression was analyzed statistically. The expression of MIIP expression in cancer tissues was increased significantly in comparison with the paired paracancerous normal epithelia (P < 0.001). And, MIIP expression was associated with ESCC cells' differentiation (P < 0.001). By Kaplan-Meier analysis, patients with low MIIP expression exhibited significantly improved overall survival (OS, P = 0.039) and a tendency of improved disease-free survival (DFS, P = 0.086) than those with high MIIP expression. In addition, MIIP expression could distinguish OS or DFS of patients with tumors in stage T3-4 (P = 0.020, 0.028), N0 (P = 0.008, 0.032), and stage II (P = 0.004, 0.019), as well as at lower thoracic esophagus (P = 0.024, 0.090). Multivariate analysis showed that MIIP expression was an independent prognostic factor in ESCC OS and DFS. In conclusion, MIIP expressed higher in ESCCs than in paracancerous normal esophageal epithelia and was a positive, independent prognostic factor in resected ESCCs.
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Affiliation(s)
- Jing Wen
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-Sen University Cancer Center, 651 Dongfeng East Road, Guangzhou, 510060, China
- Guangdong Esophageal Cancer Institute, 651 Dongfeng East Road, Guangzhou, 510060, China
| | - Qian-Wen Liu
- Guangdong Esophageal Cancer Institute, 651 Dongfeng East Road, Guangzhou, 510060, China
- Department of Thoracic Oncology, Sun Yat-Sen University Cancer Center, 651 Dongfeng East Road, Guangzhou, 510060, China
| | - Kong-Jia Luo
- Guangdong Esophageal Cancer Institute, 651 Dongfeng East Road, Guangzhou, 510060, China
- Department of Thoracic Oncology, Sun Yat-Sen University Cancer Center, 651 Dongfeng East Road, Guangzhou, 510060, China
| | - Yi-Hong Ling
- Department of Pathology, Sun Yat-Sen University Cancer Center, 651 Dongfeng East Road, Guangzhou, 510060, China
| | - Xiu-Ying Xie
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-Sen University Cancer Center, 651 Dongfeng East Road, Guangzhou, 510060, China
- Guangdong Esophageal Cancer Institute, 651 Dongfeng East Road, Guangzhou, 510060, China
| | - Hong Yang
- Guangdong Esophageal Cancer Institute, 651 Dongfeng East Road, Guangzhou, 510060, China
- Department of Thoracic Oncology, Sun Yat-Sen University Cancer Center, 651 Dongfeng East Road, Guangzhou, 510060, China
| | - Yi Hu
- Guangdong Esophageal Cancer Institute, 651 Dongfeng East Road, Guangzhou, 510060, China.
- Department of Thoracic Oncology, Sun Yat-Sen University Cancer Center, 651 Dongfeng East Road, Guangzhou, 510060, China.
| | - Jian-Hua Fu
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-Sen University Cancer Center, 651 Dongfeng East Road, Guangzhou, 510060, China.
- Guangdong Esophageal Cancer Institute, 651 Dongfeng East Road, Guangzhou, 510060, China.
- Department of Thoracic Oncology, Sun Yat-Sen University Cancer Center, 651 Dongfeng East Road, Guangzhou, 510060, China.
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