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Cai L, Liu B, Cao Y, Sun T, Li Y. Unveiling the molecular structure and role of RBBP4/7: implications for epigenetic regulation and cancer research. Front Mol Biosci 2023; 10:1276612. [PMID: 38028543 PMCID: PMC10679446 DOI: 10.3389/fmolb.2023.1276612] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2023] [Accepted: 10/31/2023] [Indexed: 12/01/2023] Open
Abstract
Retinoblastoma-binding protein (RBBP) family is a class of proteins that can interact with tumor suppressor retinoblastoma protein (pRb). RBBP4 and RBBP7 are the only pair of homologous proteins in this family, serving as scaffold proteins whose main function is to offer a platform to indirectly connect two proteins. This characteristic allows them to extensively participate in the binding of various proteins and epigenetic complexes, indirectly influencing the function of effector proteins. As a result, they are often highlighted in organism activities involving active epigenetic modifications, such as embryonic development and cancer activation. In this review, we summarize the structural characteristics of RBBP4/7, the complexes they are involved in, their roles in embryonic development and cancer, as well as potential future research directions, which we hope to inspire the field of epigenetic research in the future.
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Affiliation(s)
- Lize Cai
- The First Affiliated Hospital of Soochow University, Suzhou University, Suzhou, China
| | - Bin Liu
- Department of Neurosurgery, Qinghai Provincial People’s Hospital, Xining, China
| | - Yufei Cao
- The First Affiliated Hospital of Soochow University, Suzhou University, Suzhou, China
| | - Ting Sun
- The First Affiliated Hospital of Soochow University, Suzhou University, Suzhou, China
| | - Yanyan Li
- The First Affiliated Hospital of Soochow University, Suzhou University, Suzhou, China
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Wang R, Huang Z, Lin Z, Chen B, Pang X, Du C, Fan H. Hypoxia-induced RBBP7 promotes esophagus cancer progression by inducing CDK4 expression. Acta Biochim Biophys Sin (Shanghai) 2022; 54:179-86. [PMID: 35538026 DOI: 10.3724/abbs.2021027] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Hypoxia-induced epigenetic regulation calls for more effective therapeutic targets for esophageal cancer. We used GEPIA and UALCAN databases to screen survival-related and cancer stage-associated genes. Eca109 and KYSE450 esophageal cancer cell lines were cultured under normoxia, hypoxia, or CoCl-induced hypoxia conditions, which were further transfected with plasmids expressing RB binding protein 7 (RBBP7), hypoxia-inducible factor 1 (HIF1)-α, or RBBP7 shRNA. Colony formation and MTT assays were used to detect cell proliferation. Tumor sphere formation and stemness marker detection were applied to assess cell stemness. RT-PCR and western blot analysis were used to detect the relative mRNA level and protein expression, respectively. Luciferase assay was utilized to detect the direct interaction between HIF1α and RBBP7. Up-regulated RBBP7 was identified as one of the most prominent survival-related genes, which is negatively correlated with the overall survival (OS), disease recurrence-free survival (DFS), and tumor stages. Hypoxia-induced HIF1α up-regulates RBBP7 expression, which promotes esophagus cancer cell viability, proliferation, and stemness with increased cyclin-dependent kinase 4 (CDK4) expression. Luciferase reporter assay verified that HIF1α transcriptionally regulates the expression of RBBP7. We conclude that hypoxia induces high expression of RBBP7 which is at least partially mediated by HIF1α, up-regulates the expression of downstream CDK4, and thereby promotes tumor progression in esophageal cancer cells.
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Yu N, Zhang P, Wang L, He X, Yang S, Lu H. RBBP7 is a prognostic biomarker in patients with esophageal squamous cell carcinoma. Oncol Lett 2018; 16:7204-7211. [PMID: 30546458 PMCID: PMC6256704 DOI: 10.3892/ol.2018.9543] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [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: 04/14/2018] [Accepted: 09/20/2018] [Indexed: 12/18/2022] Open
Abstract
Retinoblastoma-binding protein 7 (RBBP7) is an important component of several complexes that regulate chromatin metabolism. It is overexpressed in certain cancer types and serves conflicting roles in tumor progression. In the present study, the expression and roles of RBBP7 were explored in esophageal squamous cell carcinoma (ESCC). Immunohistochemical staining was used to detect RBBP7 expression in ESCC tissues. The mRNA sequencing profiles from the Cancer Genome Atlas and Genotype-Tissue Expression databases were mined to analyze the mRNA expression of RBBP7 in tissues. Proliferation, clone formation, apoptosis and Transwell invasion/migration assays were performed to explore the roles of RBBP7 in ESCC. RBBP7 was highly expressed in ESCC tissues. The protein and mRNA expression levels of RBBP7 were significantly elevated in tumor tissues compared with paired adjacent normal tissues. RBBP7 overexpression was associated with a poor overall survival in patients with ESCC. Furthermore, higher RBBP7 expression was significantly correlated with poor tumor differentiation, advanced regional lymph node involvement, and pathological TNM staging. Knockdown of RBBP7 in ESCC cells did not affect tumor apoptosis or tumor growth. However, the overexpression of RBBP7 significantly enhanced the invasion and migration of ESCC cells, whereas the knockdown of RBBP7 resulted in significantly decreased invasion and migration. The present study indicated that RBBP7 is a novel biomarker and prognosticator for patients with ESCC. Furthermore, RBBP7 serves crucial roles in promoting ESCC invasion and migration.
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Affiliation(s)
- Ning Yu
- Department of Ultrasonography, The Affiliated Hospital of Qingdao University, Qingdao, Shandong 266000, P.R. China
| | - Peng Zhang
- Department of Gastroenterology, The Affiliated Hospital of Qingdao University, Qingdao, Shandong 266000, P.R. China
| | - Li Wang
- Department of Nursing, The Affiliated Qingdao Hiser Hospital of Qingdao University, Qingdao, Shandong 266000, P.R. China
| | - Xinjia He
- Department of Oncology, The Affiliated Hospital of Qingdao University, Qingdao, Shandong 266000, P.R. China
| | - Shanshan Yang
- Department of Oncology, The Affiliated Hospital of Qingdao University, Qingdao, Shandong 266000, P.R. China
| | - Haijun Lu
- Department of Oncology, The Affiliated Hospital of Qingdao University, Qingdao, Shandong 266000, P.R. China
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Liu F, Cao L, Zhang T, Chang F, Xu Y, Li Q, Deng J, Li L, Shao G. CRL4B RBBP7 targets HUWE1 for ubiquitination and proteasomal degradation. Biochem Biophys Res Commun 2018; 501:440-447. [PMID: 29738775 DOI: 10.1016/j.bbrc.2018.05.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [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: 04/26/2018] [Accepted: 05/02/2018] [Indexed: 10/16/2022]
Abstract
The E3 ubiquitin ligase HUWE1/Mule/ARF-BP1 plays an important role in diverse biological processes including DNA damage repair and apoptosis. Our previous study has shown that in response to DNA damage HUWE1 was downregulated in CUL4B-mediated ubiquitination and subsequent proteasomal degradation, and CUL4B-mediated regulation of HUWE1 was important for cell survival upon DNA damage. CUL4B is a core component of the CUL4B Ring ligase complexes containing ROC1, DDB1 and a DDB1-Cullin Associated Factors (DCAFs), the latter of which are DDB1-binding WD40 adaptors critical for substrate recognition and recruitment. However, the identity of DCAF in CRL4B that mediates degradation of HUWE1 remains elusive. Here we report that RBBP7 is the DCAF in the CRL4B complex bridging the DDB1-CUL4B-ROC1 to HUWE1. Loading of HUWE1 to the E3 ubiquitin ligase complex resulted in its polyubiquitination, and consequently its proteasome mediated degradation. Overexpression of RBBP7 promoted HUWE1 protein degradation, while depletion of RBBP7 stabilized HUWE1, and hence accelerated the degradation of MCL-1 and BRCA1, two substrates of HUWE1 that are critical in apoptosis and DNA damage repair. Taken together, these data reveal CRL4BRBBP7 is the E3 ligase responsible for the proteasomal degradation of HUWE1, and further provide a potential strategy for cancer therapy by targeting HUWE1 and the CUL4B E3 ligase complex.
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Affiliation(s)
- Fei Liu
- Department of Cell Biology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, 100191, China; Department of Pathology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, 100191, China
| | - Li Cao
- Department of Cell Biology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, 100191, China
| | - Ting Zhang
- Department of Cell Biology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, 100191, China
| | - Fen Chang
- Department of Cell Biology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, 100191, China
| | - Yongjie Xu
- Department of Cell Biology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, 100191, China
| | - Qin Li
- Department of Cell Biology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, 100191, China
| | - Jingcheng Deng
- Department of Cell Biology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, 100191, China
| | - Li Li
- Department of Cell Biology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, 100191, China
| | - Genze Shao
- Department of Cell Biology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, 100191, China.
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He H, Kong S, Liu F, Zhang S, Jiang Y, Liao Y, Jiang Y, Li Q, Wang B, Zhou Z, Wang H, Huo R. Rbbp7 Is Required for Uterine Stromal Decidualization in Mice1. Biol Reprod 2015; 93:13. [DOI: 10.1095/biolreprod.115.129015] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2015] [Accepted: 05/27/2015] [Indexed: 01/29/2023] Open
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Abstract
The progression to advanced stage cancer requires changes in many characteristics of a cell. These changes are usually initiated through spontaneous mutation. As a result of these mutations, gene expression is almost invariably altered allowing the cell to acquire tumor-promoting characteristics. These abnormal gene expression patterns are in part enabled by the posttranslational modification and remodeling of nucleosomes in chromatin. These chromatin modifications are established by a functionally diverse family of enzymes including histone and DNA-modifying complexes, histone deposition pathways, and chromatin remodeling complexes. Because the modifications these enzymes deposit are essential for maintaining tumor-promoting gene expression, they have recently attracted much interest as novel therapeutic targets. One class of enzyme that has not generated much interest is the chromatin remodeling complexes. In this review, we will present evidence from the literature that these enzymes have both causal and enabling roles in the transition to advanced stage cancers; as such, they should be seriously considered as high-value therapeutic targets. Previously published strategies for discovering small molecule regulators to these complexes are described. We close with thoughts on future research, the field should perform to further develop this potentially novel class of therapeutic target.
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Affiliation(s)
- Kimberly Mayes
- Department of Human and Molecular Genetics, VCU Institute of Molecular Medicine, Massey Cancer Center, Virginia Commonwealth University School of Medicine, Richmond, Virginia, USA
| | - Zhijun Qiu
- Department of Human and Molecular Genetics, VCU Institute of Molecular Medicine, Massey Cancer Center, Virginia Commonwealth University School of Medicine, Richmond, Virginia, USA
| | - Aiman Alhazmi
- Department of Human and Molecular Genetics, VCU Institute of Molecular Medicine, Massey Cancer Center, Virginia Commonwealth University School of Medicine, Richmond, Virginia, USA
| | - Joseph W Landry
- Department of Human and Molecular Genetics, VCU Institute of Molecular Medicine, Massey Cancer Center, Virginia Commonwealth University School of Medicine, Richmond, Virginia, USA.
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Yeh HH, Tseng YF, Hsu YC, Lan SH, Wu SY, Raghavaraju G, Cheng DE, Lee YR, Chang TY, Chow NH, Hung WC, Liu HS. Ras induces experimental lung metastasis through up-regulation of RbAp46 to suppress RECK promoter activity. BMC Cancer 2015; 15:172. [PMID: 25885317 PMCID: PMC4377201 DOI: 10.1186/s12885-015-1155-7] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [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: 08/13/2014] [Accepted: 03/02/2015] [Indexed: 12/30/2022] Open
Abstract
Background Mutant Ras plays multiple functions in tumorigenesis including tumor formation and metastasis. Reversion-inducing cysteine-rich protein with Kazal motifs (RECK), a metastasis inhibitor gene, suppresses matrix metalloproteinase (MMP) activity in the metastatic cascade. Clarifying the relationship between Ras and RECK and understanding the underlying molecular mechanism may lead to the development of better treatment for Ras-related tumors. Methods Suppression subtractive hybridization PCR (SSH PCR) was conducted to identify Ha-rasval12 up-regulated genes in bladder cancer cells. Stable cell lines of human breast cancer (MCF-7-ras) and mouse NIH3T3 fibroblasts (7–4) harboring the inducible Ha-rasval12 oncogene, which could be induced by isopropylthio-β-D-galactoside (IPTG), were used to clarify the relationship between Ras and the up-regulated genes. Chromatin immunoprecipitation (ChIP) assay, DNA affinity precipitation assay (DAPA) and RECK reporter gene assay were utilized to confirm the complex formation and binding with promoters. Results Retinoblastoma binding protein-7 (RbAp46) was identified and confirmed as a Ha-rasval12 up-regulated gene. RbAp46 could bind with histone deacetylase (HDAC1) and Sp1, followed by binding to RECK promoter at the Sp1 site resulting in repression of RECK expression. High expression of Ras protein accompanied with high RbAp46 and low RECK expression were detected in 75% (3/4) of the clinical bladder cancer tumor tissues compared to the adjacent normal parts. Ras induced RbAp46 expression increases invasion of the bladder cancer T24 cells and MMP-9 activity was increased, which was confirmed by specific lentiviral shRNAs inhibitors against Ras and RbAp46. Similarly, knockdown of RbAp46 expression in the stable NIH3T3 cells “7-4” by shRNA decreased Ras-related lung metastasis using a xenograft nude mice model. Conclusions We confirmed that RbAp46 is a Ha-rasval12 up-regulated gene and binds with HDAC1 and Sp1. Furthermore, RbAp46 binds to the RECK promoter at the Sp1 site via recruitment by Sp1. RECK is subsequently activated, leading to increased MMP9 activity, which may lead to increased metastasis in vivo. Our findings of Ras upregulation of RbAp46 may lead to revealing a novel mechanism of Ras-related tumor cell metastasis. Electronic supplementary material The online version of this article (doi:10.1186/s12885-015-1155-7) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Hsuan-Heng Yeh
- Department of Microbiology and Immunology, National Cheng Kung University, Tainan, Taiwan. .,Institute of Basic Medical Sciences, National Cheng Kung University, Tainan, Taiwan.
| | - Yu-Fen Tseng
- Department of Microbiology and Immunology, National Cheng Kung University, Tainan, Taiwan.
| | - Yu-Chiao Hsu
- Department of Microbiology and Immunology, National Cheng Kung University, Tainan, Taiwan.
| | - Sheng-Hui Lan
- Department of Microbiology and Immunology, National Cheng Kung University, Tainan, Taiwan. .,Institute of Basic Medical Sciences, National Cheng Kung University, Tainan, Taiwan.
| | - Shan-Ying Wu
- Department of Microbiology and Immunology, National Cheng Kung University, Tainan, Taiwan. .,Institute of Basic Medical Sciences, National Cheng Kung University, Tainan, Taiwan.
| | - Giri Raghavaraju
- Department of Microbiology and Immunology, National Cheng Kung University, Tainan, Taiwan.
| | - Da-En Cheng
- Department of Microbiology and Immunology, National Cheng Kung University, Tainan, Taiwan.
| | - Ying-Ray Lee
- Department of Medical Research, Chiayi Christian Hospital, Chiayi, Taiwan.
| | - Tsuey-Yu Chang
- Department of Parasitology, National Cheng Kung University, Tainan, Taiwan.
| | - Nan-Haw Chow
- Department of Pathology, National Cheng Kung University, Tainan, Taiwan.
| | - Wen-Chun Hung
- Center of Infectious Disease and Signaling Research, National Cheng Kung University, Tainan, Taiwan. .,National Institute of Cancer Research, National Health Research Institutes, Tainan, Taiwan.
| | - Hsiao-Sheng Liu
- Department of Microbiology and Immunology, National Cheng Kung University, Tainan, Taiwan. .,Institute of Basic Medical Sciences, National Cheng Kung University, Tainan, Taiwan. .,Center of Infectious Disease and Signaling Research, National Cheng Kung University, Tainan, Taiwan.
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Wu Q, Liu J, Chen Y, Jiao R. dCAF-1-p55 is Essential for Drosophila Development and Involved in The Maintenance of Chromosomal Stability*]]>: dCAF-1-p55 is Essential for Drosophila Development and Involved in The Maintenance of Chromosomal Stability*]]>. PROG BIOCHEM BIOPHYS 2012;39:1073-81. [DOI: 10.3724/sp.j.1206.2012.00084] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Abstract
Cancer cells silence autosomal tumor suppressor genes by Knudson's two-hit mechanism in which loss-of-function mutations and then loss of heterozygosity occur at the tumor suppressor gene loci. However, the identification of X-linked tumor suppressor genes has challenged the traditional theory of 'two-hit inactivation' in tumor suppressor genes, introducing the novel concept that a single genetic hit can cause loss of tumor suppressor function. The mechanism through which these genes are silenced in human cancer is unclear, but elucidating the details will greatly enhance our understanding of the pathogenesis of human cancer. Here, we review the identification of X-linked tumor suppressor genes and discuss the potential mechanisms of their inactivation. In addition, we also discuss how the identification of X-linked tumor suppressor genes can potentially lead to new approaches in cancer therapy.
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Affiliation(s)
- Runhua Liu
- Division of Immunotherapy, Department of Surgery, University of Michigan School of Medicine, Ann Arbor, MI, USA
- Department of Genetics, School of Medicine, University of Alabama at Birmingham and Comprehensive Cancer Center, Birmingham, AL, USA
| | - Mandy Kain
- Division of Immunotherapy, Department of Surgery, University of Michigan School of Medicine, Ann Arbor, MI, USA
| | - Lizhong Wang
- Division of Immunotherapy, Department of Surgery, University of Michigan School of Medicine, Ann Arbor, MI, USA
- Department of Genetics, School of Medicine, University of Alabama at Birmingham and Comprehensive Cancer Center, Birmingham, AL, USA
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Anderson AE, Karandikar UC, Pepple KL, Chen Z, Bergmann A, Mardon G. The enhancer of trithorax and polycomb gene Caf1/p55 is essential for cell survival and patterning in Drosophila development. Development 2011; 138:1957-66. [PMID: 21490066 DOI: 10.1242/dev.058461] [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: 12/18/2022]
Abstract
In vitro data suggest that the human RbAp46 and RbAp48 genes encode proteins involved in multiple chromatin remodeling complexes and are likely to play important roles in development and tumor suppression. However, to date, our understanding of the role of RbAp46/RbAp48 and its homologs in metazoan development and disease has been hampered by a lack of insect and mammalian mutant models, as well as redundancy due to multiple orthologs in most organisms studied. Here, we report the first mutations in the single Drosophila RbAp46/RbAp48 homolog Caf1, identified as strong suppressors of a senseless overexpression phenotype. Reduced levels of Caf1 expression result in flies with phenotypes reminiscent of Hox gene misregulation. Additionally, analysis of Caf1 mutant tissue suggests that Caf1 plays important roles in cell survival and segment identity, and loss of Caf1 is associated with a reduction in the Polycomb Repressive Complex 2 (PRC2)-specific histone methylation mark H3K27me3. Taken together, our results suggest suppression of senseless overexpression by mutations in Caf1 is mediated by participation of Caf1 in PRC2-mediated silencing. More importantly, our mutant phenotypes confirm that Caf1-mediated silencing is vital to Drosophila development. These studies underscore the importance of Caf1 and its mammalian homologs in development and disease.
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Affiliation(s)
- Aimée E Anderson
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA
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Wang CL, Wang CI, Liao PC, Chen CD, Liang Y, Chuang WY, Tsai YH, Chen HC, Chang YS, Yu JS, Wu CC, Yu CJ. Discovery of Retinoblastoma-Associated Binding Protein 46 as a Novel Prognostic Marker for Distant Metastasis in Nonsmall Cell Lung Cancer by Combined Analysis of Cancer Cell Secretome and Pleural Effusion Proteome. J Proteome Res 2009; 8:4428-40. [DOI: 10.1021/pr900160h] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Chih-Liang Wang
- Division of Pulmonary Oncology and Interventional Bronchoscopy, Department of Thoracic Medicine, Chang Gung Memorial Hospital, Tao-Yuan, Taiwan, Graduate Institute of Clinical Medical Sciences, Chang Gung University, Tao-Yuan, Taiwan, Graduate Institute of Biomedical Sciences, Biology, Chang Gung University, Tao-Yuan, Taiwan, Department of Environmental and Occupational Health, College of Medicine, National Cheng Kung University, Tainan, Taiwan, Molecular Medicine Research Center, Chang Gung University,
| | - Chun-I Wang
- Division of Pulmonary Oncology and Interventional Bronchoscopy, Department of Thoracic Medicine, Chang Gung Memorial Hospital, Tao-Yuan, Taiwan, Graduate Institute of Clinical Medical Sciences, Chang Gung University, Tao-Yuan, Taiwan, Graduate Institute of Biomedical Sciences, Biology, Chang Gung University, Tao-Yuan, Taiwan, Department of Environmental and Occupational Health, College of Medicine, National Cheng Kung University, Tainan, Taiwan, Molecular Medicine Research Center, Chang Gung University,
| | - Pao-Chi Liao
- Division of Pulmonary Oncology and Interventional Bronchoscopy, Department of Thoracic Medicine, Chang Gung Memorial Hospital, Tao-Yuan, Taiwan, Graduate Institute of Clinical Medical Sciences, Chang Gung University, Tao-Yuan, Taiwan, Graduate Institute of Biomedical Sciences, Biology, Chang Gung University, Tao-Yuan, Taiwan, Department of Environmental and Occupational Health, College of Medicine, National Cheng Kung University, Tainan, Taiwan, Molecular Medicine Research Center, Chang Gung University,
| | - Chi-De Chen
- Division of Pulmonary Oncology and Interventional Bronchoscopy, Department of Thoracic Medicine, Chang Gung Memorial Hospital, Tao-Yuan, Taiwan, Graduate Institute of Clinical Medical Sciences, Chang Gung University, Tao-Yuan, Taiwan, Graduate Institute of Biomedical Sciences, Biology, Chang Gung University, Tao-Yuan, Taiwan, Department of Environmental and Occupational Health, College of Medicine, National Cheng Kung University, Tainan, Taiwan, Molecular Medicine Research Center, Chang Gung University,
| | - Ying Liang
- Division of Pulmonary Oncology and Interventional Bronchoscopy, Department of Thoracic Medicine, Chang Gung Memorial Hospital, Tao-Yuan, Taiwan, Graduate Institute of Clinical Medical Sciences, Chang Gung University, Tao-Yuan, Taiwan, Graduate Institute of Biomedical Sciences, Biology, Chang Gung University, Tao-Yuan, Taiwan, Department of Environmental and Occupational Health, College of Medicine, National Cheng Kung University, Tainan, Taiwan, Molecular Medicine Research Center, Chang Gung University,
| | - Wen-Yu Chuang
- Division of Pulmonary Oncology and Interventional Bronchoscopy, Department of Thoracic Medicine, Chang Gung Memorial Hospital, Tao-Yuan, Taiwan, Graduate Institute of Clinical Medical Sciences, Chang Gung University, Tao-Yuan, Taiwan, Graduate Institute of Biomedical Sciences, Biology, Chang Gung University, Tao-Yuan, Taiwan, Department of Environmental and Occupational Health, College of Medicine, National Cheng Kung University, Tainan, Taiwan, Molecular Medicine Research Center, Chang Gung University,
| | - Ying-Huang Tsai
- Division of Pulmonary Oncology and Interventional Bronchoscopy, Department of Thoracic Medicine, Chang Gung Memorial Hospital, Tao-Yuan, Taiwan, Graduate Institute of Clinical Medical Sciences, Chang Gung University, Tao-Yuan, Taiwan, Graduate Institute of Biomedical Sciences, Biology, Chang Gung University, Tao-Yuan, Taiwan, Department of Environmental and Occupational Health, College of Medicine, National Cheng Kung University, Tainan, Taiwan, Molecular Medicine Research Center, Chang Gung University,
| | - Hua-Chien Chen
- Division of Pulmonary Oncology and Interventional Bronchoscopy, Department of Thoracic Medicine, Chang Gung Memorial Hospital, Tao-Yuan, Taiwan, Graduate Institute of Clinical Medical Sciences, Chang Gung University, Tao-Yuan, Taiwan, Graduate Institute of Biomedical Sciences, Biology, Chang Gung University, Tao-Yuan, Taiwan, Department of Environmental and Occupational Health, College of Medicine, National Cheng Kung University, Tainan, Taiwan, Molecular Medicine Research Center, Chang Gung University,
| | - Yu-Sun Chang
- Division of Pulmonary Oncology and Interventional Bronchoscopy, Department of Thoracic Medicine, Chang Gung Memorial Hospital, Tao-Yuan, Taiwan, Graduate Institute of Clinical Medical Sciences, Chang Gung University, Tao-Yuan, Taiwan, Graduate Institute of Biomedical Sciences, Biology, Chang Gung University, Tao-Yuan, Taiwan, Department of Environmental and Occupational Health, College of Medicine, National Cheng Kung University, Tainan, Taiwan, Molecular Medicine Research Center, Chang Gung University,
| | - Jau-Song Yu
- Division of Pulmonary Oncology and Interventional Bronchoscopy, Department of Thoracic Medicine, Chang Gung Memorial Hospital, Tao-Yuan, Taiwan, Graduate Institute of Clinical Medical Sciences, Chang Gung University, Tao-Yuan, Taiwan, Graduate Institute of Biomedical Sciences, Biology, Chang Gung University, Tao-Yuan, Taiwan, Department of Environmental and Occupational Health, College of Medicine, National Cheng Kung University, Tainan, Taiwan, Molecular Medicine Research Center, Chang Gung University,
| | - Chih-Ching Wu
- Division of Pulmonary Oncology and Interventional Bronchoscopy, Department of Thoracic Medicine, Chang Gung Memorial Hospital, Tao-Yuan, Taiwan, Graduate Institute of Clinical Medical Sciences, Chang Gung University, Tao-Yuan, Taiwan, Graduate Institute of Biomedical Sciences, Biology, Chang Gung University, Tao-Yuan, Taiwan, Department of Environmental and Occupational Health, College of Medicine, National Cheng Kung University, Tainan, Taiwan, Molecular Medicine Research Center, Chang Gung University,
| | - Chia-Jung Yu
- Division of Pulmonary Oncology and Interventional Bronchoscopy, Department of Thoracic Medicine, Chang Gung Memorial Hospital, Tao-Yuan, Taiwan, Graduate Institute of Clinical Medical Sciences, Chang Gung University, Tao-Yuan, Taiwan, Graduate Institute of Biomedical Sciences, Biology, Chang Gung University, Tao-Yuan, Taiwan, Department of Environmental and Occupational Health, College of Medicine, National Cheng Kung University, Tainan, Taiwan, Molecular Medicine Research Center, Chang Gung University,
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Ryu SI, Kim WK, Cho HJ, Lee PY, Jung H, Yoon TS, Moon JH, Kang S, Poo H, Bae KH, Lee SC. Phosphoproteomic analysis of AML14.3D10 cell line as a model system of eosinophilia. BMB Rep 2008; 40:765-72. [PMID: 17927911 DOI: 10.5483/bmbrep.2007.40.5.765] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Eosinophils act as effectors in the inflammatory reactions of allergic diseases including atopic dermatitis. Atopic dermatitis patients and others with allergic disorders suffer from eosinophilia, an accumulation of eosinophils due to increased survival or decreased apoptosis of eosinophils. In this study, a differential phosphoproteome analysis of AML14.3D10 eosinophil cell line after treatment with IL-5 or dexamethasone was conducted in an effort to identify the phosphoproteins involved in the proliferation or apoptosis of eosinophils. Proteins were separated by 2-DE and alterations in phosphoproteins were then detected by Pro-Q Diamond staining. The significant quantitative changes were shown in nineteen phosphoproteins including retinoblastoma binding protein 7, MTHSP75, and lymphocyte cytosolic protein 1. In addition, seven phosphoproteins including galactokinase I, and proapolipoprotein, were appeared after treatment with IL-5 or dexamethasone. Especially, the phospho-APOE protein was down-regulated in IL-5 treated AML14.3D10, while the more heavily phosphorylated APOE form was induced after dexamethasone treatment. These phosphoproteome data for the AML14.3D10 cell line may provide clues to understand the mechanism of eosinophilia as well as allergic disorders including atopic dermatitis.
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Affiliation(s)
- Su In Ryu
- Translational Research Center, KRIBB, Daejeon, 305-806, South Korea
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Kong L, Yu XP, Bai XH, Zhang WF, Zhang Y, Zhao WM, Jia JH, Tang W, Zhou YB, Liu CJ. RbAp48 Is a Critical Mediator Controlling the Transforming Activity of Human Papillomavirus Type 16 in Cervical Cancer. J Biol Chem 2007; 282:26381-91. [PMID: 17616526 DOI: 10.1074/jbc.m702195200] [Citation(s) in RCA: 34] [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] [Indexed: 01/27/2023] Open
Abstract
Although human papillomavirus (HPV) infections are the primary cause of cervical cancer, the molecular mechanism by which HPV induces cervical cancer remains largely unclear. We used two-dimensional electrophoresis with mass spectrometry to study protein expression profiling between HPV16-positive cervical mucosa epithelial H8 cells and cervical cancer Caski cells to identify 18 differentially expressed proteins. Among them, retinoblastoma-binding protein 4 (RbAp48) was selected, and its differentiation expression was verified with both additional cervical cancer-derived cell lines and human tissues of cervical intraepithelial neoplasia and cervical cancer. Suppression of RbAp48 using small interfering RNA approach in H8 cells significantly stimulated cell proliferation and colony formation and inhibited senescence-like phenotype. Remarkably, H8 cells acquired transforming activity if RpAp48 was suppressed, because H8 cells stably transfected with RbAp48 small interfering RNA led to tumor formation in nude mice. In addition, overexpression of RbAp48 significantly inhibited cell growth and tumor formation. This RbAp48-mediated transformation of HPV16 is probably because of the regulation by RbAp48 of tumor suppressors retinoblastoma and p53, apoptosis-related enzymes caspase-3 and caspase-8, and oncogenic genes, including E6, E7, cyclin D1 (CCND1), and c-MYC. In brief, RbAp48, previously unknown in cervical carcinogenesis, was isolated in a global screen and identified as a critical mediator controlling the transforming activity of HPV16 in cervical cancer.
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MESH Headings
- Animals
- Carrier Proteins/antagonists & inhibitors
- Carrier Proteins/genetics
- Carrier Proteins/metabolism
- Caspase 3/biosynthesis
- Caspase 3/genetics
- Caspase 8/biosynthesis
- Caspase 8/genetics
- Cell Line, Transformed
- Cell Line, Tumor
- Cell Transformation, Viral/drug effects
- Cellular Senescence/drug effects
- Cyclin D
- Cyclins/biosynthesis
- Cyclins/genetics
- Electrophoresis, Gel, Two-Dimensional
- Female
- Gene Expression Profiling
- Gene Expression Regulation, Neoplastic/drug effects
- HeLa Cells
- Human papillomavirus 16/genetics
- Human papillomavirus 16/metabolism
- Humans
- Mice
- Mice, Nude
- Neoplasm Transplantation
- Nuclear Proteins/antagonists & inhibitors
- Nuclear Proteins/genetics
- Nuclear Proteins/metabolism
- Oncogene Proteins, Viral/biosynthesis
- Oncogene Proteins, Viral/genetics
- Papillomavirus E7 Proteins
- Phenotype
- Proto-Oncogene Proteins c-myc/biosynthesis
- Proto-Oncogene Proteins c-myc/genetics
- RNA, Small Interfering/pharmacology
- Repressor Proteins/biosynthesis
- Repressor Proteins/genetics
- Retinoblastoma Protein/biosynthesis
- Retinoblastoma Protein/genetics
- Retinoblastoma-Binding Protein 4
- Tumor Suppressor Protein p53/biosynthesis
- Tumor Suppressor Protein p53/genetics
- Uterine Cervical Neoplasms/genetics
- Uterine Cervical Neoplasms/metabolism
- Uterine Cervical Dysplasia/genetics
- Uterine Cervical Dysplasia/metabolism
- Uterine Cervical Dysplasia/virology
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Affiliation(s)
- Li Kong
- Department of Orthopaedic Surgery, New York University Medical Center, New York, New York 10003, USA
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14
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Abstract
Aberrant methylation patterns of genomic DNA are well-studied epigenetic mutations in cancer. Hypermethylation of CpG islands in tumor-suppressor genes promotes oncogenesis and hypomethylation of global genomic DNA affects genomic stability. Cancer is recognized as a genetic and epigenetic disease. However, it is not clear how epigenetic regulatory factors, including histone modification enzymes, chromatin components and other factors are involved in carcinogenesis. To gain insights into the molecular mechanisms mediated by these factors at the early stage of hepatocarcinogenesis and hepatotoxicity induced by chemicals, we investigated gene expression profiles by DNA microarray and Western blot analyses. We prepared RNA and nuclear extracts from livers with hyperplastic nodules expressing Glutathione S-transferase placental form (GST-P) and compared findings with those of normal liver. GST-P is a phase II detoxification enzyme and a well-known tumor marker. We identified several epigenetic regulatory factors that showed dysregulated expression during chemically induced hepatocarcinogenesis. Here I review the characterization and functions of these factors and discuss the mechanisms of tumor marker gene expression during chemical hepatocarcinogenesis.
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Affiliation(s)
- Shigehiro Osada
- Department of Molecular Biology, Graduate School of Pharmaceutical Sciences, Nagoya City University, Japan.
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15
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Osada S, Naganawa A, Misonou M, Tsuchiya S, Tamba S, Okuno Y, Nishikawa JI, Satoh K, Imagawa M, Tsujimoto G, Sugimoto Y, Nishihara T. Altered gene expression of transcriptional regulatory factors in tumor marker-positive cells during chemically induced hepatocarcinogenesis. Toxicol Lett 2006; 167:106-13. [PMID: 16997513 DOI: 10.1016/j.toxlet.2006.08.014] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [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: 08/10/2006] [Revised: 08/29/2006] [Accepted: 08/29/2006] [Indexed: 11/25/2022]
Abstract
Glutathione-S-transferase placental form (GST-P) is markedly and specifically inducible in rat chemical hepatocarcinogenesis and is a reliable marker protein for pre-neoplasia. To gain insights into the molecular mechanisms at the early stage of hepatocarcinogenesis and hepatotoxicity, we investigated the gene expression profile by DNA microarray analysis. We prepared RNA from GST-P-positive foci in three individual rats and compared with normal liver sections from three individual rats, and labeled RNA was individually hybridized onto Affymetrix GeneChip Rat Expression Array 230A. DNA microarray analysis showed distinctly different profiles of dysregulated gene expression and supported the previous finding that some enzymes involved in metabolism and detoxification are overexpressed and suppressed. Here we discovered that several DNA-binding transcription factors and cofactors, including sterol-regulatory-element binding protein 1 (SREBP1) and Wilms' tumour 1 (WT1)-interacting protein, and their target genes were dysregulated in GST-P-positive foci. Moreover, genes involved in chromatin components, histone modification enzymes, and centrosome duplication were highly expressed. These genes were not previously known to be up-regulated during chemically induced hepatocarcinogenesis. DNA microarray analysis using RNA prepared from tumor marker-positive foci and control tissues provided a candidate gene link to the early stage of carcinogenesis and hepatotoxicity.
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Affiliation(s)
- Shigehiro Osada
- Laboratory of Environmental Biochemistry, Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamada-Oka, Suita, Osaka 565-0871, Japan.
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16
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Hennig L, Bouveret R, Gruissem W. MSI1-like proteins: an escort service for chromatin assembly and remodeling complexes. Trends Cell Biol 2005; 15:295-302. [PMID: 15953547 DOI: 10.1016/j.tcb.2005.04.004] [Citation(s) in RCA: 110] [Impact Index Per Article: 5.8] [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: 12/09/2004] [Revised: 04/04/2005] [Accepted: 04/20/2005] [Indexed: 10/25/2022]
Abstract
MSI1-like WD40 repeat proteins are subunits of many protein complexes controlling chromatin dynamics. These proteins do not have any catalytic activity, but several recent studies using loss-of-function mutants established specific functions during development. Here, we review the current knowledge of MSI1-like proteins, including their phylogenetic history, expression patterns, biochemical interactions and mutant phenotypes. MSI1-like proteins, which are often targets or partners of tumor-suppressor proteins, are required during cell proliferation and differentiation in flies, nematodes and plants. We discuss the possibility that MSI1-like proteins could function to maintain epigenetic memory during development by targeting silencing complexes to chromatin during nucleosome assembly.
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Affiliation(s)
- Lars Hennig
- Institute of Plant Sciences, Swiss Federal Institute of Technology and Zürich-Basel Plant Science Center, ETH Center, CH-8092 Zürich.
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