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Araujo-Abad S, Rizzuti B, Vidal M, Abian O, Fárez-Vidal ME, Velazquez-Campoy A, de Juan Romero C, Neira JL. Unveiling the Binding between the Armadillo-Repeat Domain of Plakophilin 1 and the Intrinsically Disordered Transcriptional Repressor RYBP. Biomolecules 2024; 14:561. [PMID: 38785968 PMCID: PMC11117474 DOI: 10.3390/biom14050561] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2024] [Revised: 04/29/2024] [Accepted: 05/04/2024] [Indexed: 05/25/2024] Open
Abstract
Plakophilin 1 (PKP1), a member of the p120ctn subfamily of the armadillo (ARM)-repeat-containing proteins, is an important structural component of cell-cell adhesion scaffolds although it can also be ubiquitously found in the cytoplasm and the nucleus. RYBP (RING 1A and YY1 binding protein) is a multifunctional intrinsically disordered protein (IDP) best described as a transcriptional regulator. Both proteins are involved in the development and metastasis of several types of tumors. We studied the binding of the armadillo domain of PKP1 (ARM-PKP1) with RYBP by using in cellulo methods, namely immunofluorescence (IF) and proximity ligation assay (PLA), and in vitro biophysical techniques, namely fluorescence, far-ultraviolet (far-UV) circular dichroism (CD), and isothermal titration calorimetry (ITC). We also characterized the binding of the two proteins by using in silico experiments. Our results showed that there was binding in tumor and non-tumoral cell lines. Binding in vitro between the two proteins was also monitored and found to occur with a dissociation constant in the low micromolar range (~10 μM). Finally, in silico experiments provided additional information on the possible structure of the binding complex, especially on the binding ARM-PKP1 hot-spot. Our findings suggest that RYBP might be a rescuer of the high expression of PKP1 in tumors, where it could decrease the epithelial-mesenchymal transition in some cancer cells.
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Affiliation(s)
- Salome Araujo-Abad
- Cancer Research Group, Faculty of Engineering and Applied Sciences, Universidad de Las Américas, 170124 Quito, Ecuador;
- IDIBE, Universidad Miguel Hernández, 03202 Elche, Spain
| | - Bruno Rizzuti
- CNR-NANOTEC, SS Rende (CS), Department of Physics, University of Calabria, 87036 Rende, Italy;
- Institute of Biocomputation and Physics of Complex Systems (BIFI), Universidad de Zaragoza, 50018 Zaragoza, Spain; (O.A.); (A.V.-C.)
| | - Miguel Vidal
- Centro de Investigaciones Biológicas Margarita Salas (CSIC), Calle Ramiro de Maeztu, 9, 28040 Madrid, Spain;
| | - Olga Abian
- Institute of Biocomputation and Physics of Complex Systems (BIFI), Universidad de Zaragoza, 50018 Zaragoza, Spain; (O.A.); (A.V.-C.)
- Instituto de Investigación Sanitaria Aragón (IIS Aragón), 50009 Zaragoza, Spain
- Centro de Investigación Biomédica en Red en el Área Temática de Enfermedades Hepáticas y Digestivas (CIBERehd), 28029 Madrid, Spain
- Departamento de Bioquímica y Biología Molecular y Celular, Universidad de Zaragoza, 50009 Zaragoza, Spain
| | - María Esther Fárez-Vidal
- Departamento de Bioquímica y Biología Molecular III e Inmunología, Facultad de Medicina, Universidad de Granada, 18016 Granada, Spain;
- Instituto de Investigación Biomédica IBS, Granada, Complejo Hospitalario Universitario de Granada, Universidad de Granada, 18071 Granada, Spain
| | - Adrian Velazquez-Campoy
- Institute of Biocomputation and Physics of Complex Systems (BIFI), Universidad de Zaragoza, 50018 Zaragoza, Spain; (O.A.); (A.V.-C.)
- Instituto de Investigación Sanitaria Aragón (IIS Aragón), 50009 Zaragoza, Spain
- Centro de Investigación Biomédica en Red en el Área Temática de Enfermedades Hepáticas y Digestivas (CIBERehd), 28029 Madrid, Spain
- Departamento de Bioquímica y Biología Molecular y Celular, Universidad de Zaragoza, 50009 Zaragoza, Spain
| | - Camino de Juan Romero
- IDIBE, Universidad Miguel Hernández, 03202 Elche, Spain
- Unidad de Investigación, Fundación para el Fomento de la Investigación Sanitaria y Biomédica de la Comunidad Valenciana (FISABIO), Hospital General Universitario de Elche, Camí de l’Almazara 11, 03203 Elche, Spain
| | - José L. Neira
- IDIBE, Universidad Miguel Hernández, 03202 Elche, Spain
- Institute of Biocomputation and Physics of Complex Systems (BIFI), Universidad de Zaragoza, 50018 Zaragoza, Spain; (O.A.); (A.V.-C.)
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Morinaka T, Sakai N, Takayashiki T, Kuboki S, Takano S, Ohira G, Matsubara H, Ohtsuka M. RYBP contributes to improved prognosis in colorectal cancer via regulation of cell cycle, apoptosis and oxaliplatin sensitivity. Int J Oncol 2023; 63:120. [PMID: 37654197 PMCID: PMC10546375 DOI: 10.3892/ijo.2023.5568] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Accepted: 08/16/2023] [Indexed: 09/02/2023] Open
Abstract
Ring1 and YY‑1 binding protein (RYBP) is a member of the polycomb repressive complex 1 and serves as a transcriptional suppressor via epigenetic modification. RYBP has a tumour‑suppressive role in solid tumours, but its function in colorectal cancer (CRC) remains unknown. The present study evaluated the expression of RYBP using immunohistochemistry in 140 cases of primary CRC and 11 patient‑matched cases of liver metastases. Using CRC cell lines with different TP53 gene status such as HCT116 (TP53wt/wt), HCT116 (TP53‑/‑), SW48 and DLD‑1 cells, proliferation, cell cycle progression and apoptosis, as well as the effect of RYBP on oxaliplatin sensitivity, were assessed. Clinical data showed that low RYBP expression was significantly associated with risk of distant metastasis and recurrence, and patients with high RYBP expression demonstrated significantly better cancer‑specific and disease‑free survival. In vitro experiments revealed that RYBP suppressed cell proliferation by inducing cell cycle arrest and apoptosis in TP53 wild‑type cells. In addition, endogenous RYBP overexpression enhanced sensitivity to oxaliplatin. Therefore, RYBP may contribute to improved prognosis in CRC by regulating the cell cycle, apoptosis and oxaliplatin sensitivity via the p53‑mediated pathway.
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Affiliation(s)
- Takashi Morinaka
- Department of General Surgery, Graduate School of Medicine, Chiba University, Chiba 260-8670, Japan
| | - Nozomu Sakai
- Department of General Surgery, Graduate School of Medicine, Chiba University, Chiba 260-8670, Japan
| | - Tsukasa Takayashiki
- Department of General Surgery, Graduate School of Medicine, Chiba University, Chiba 260-8670, Japan
| | - Satoshi Kuboki
- Department of General Surgery, Graduate School of Medicine, Chiba University, Chiba 260-8670, Japan
| | - Shigetsugu Takano
- Department of General Surgery, Graduate School of Medicine, Chiba University, Chiba 260-8670, Japan
| | - Gaku Ohira
- Department of Frontier Surgery, Graduate School of Medicine, Chiba University, Chiba 260-8670, Japan
| | - Hisahiro Matsubara
- Department of Frontier Surgery, Graduate School of Medicine, Chiba University, Chiba 260-8670, Japan
| | - Masayuki Ohtsuka
- Department of General Surgery, Graduate School of Medicine, Chiba University, Chiba 260-8670, Japan
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Clinical Significance of TUBGCP4 Expression in Hepatocellular Carcinoma. Anal Cell Pathol (Amst) 2022; 2022:9307468. [DOI: 10.1155/2022/9307468] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 11/06/2022] [Accepted: 11/21/2022] [Indexed: 12/13/2022] Open
Abstract
We aim to investigate the expression and clinical significance of the tubulin gamma complex-associated protein 4 (TUBGCP4) in hepatocellular carcinoma (HCC). The mRNA expression of TUBGCP4 in HCC tissues was analyzed using The Cancer Genome Atlas (TCGA) database. Paired HCC and adjacent nontumor tissues were obtained from HCC patients to measure the protein expression of TUBGCP4 by immunohistochemistry (IHC) and to analyze the relationship between TUBGCP4 protein expression and the clinicopathological characteristics and the prognosis of HCC patients. We found that TUBGCP4 mRNA expression was upregulated in HCC tissues from TCGA database. IHC analysis showed that TUBGCP4 was positively expressed in 61.25% (49/80) of HCC tissues and 77.5% (62/80) of adjacent nontumor tissues. The Chi-square analysis indicated that the positive rate of TUBGCP4 expression between HCC tissues and the adjacent nontumor tissues was statistically different (
). Furthermore, we found that TUBGCP4 protein expression was correlated with carbohydrate antigen (CA-199) levels of HCC patients (
). Further, survival analysis showed that the overall survival time and tumor-free survival time in the TUBGCP4 positive group were significantly higher than those of the negative group (
), indicating that the positive expression of TUBGCP4 was related to a better prognosis of HCC patients. COX model showed that TUBGCP4 was an independent prognostic factor for HCC patients. Our study indicates that TUBGCP4 protein expression is downregulated in HCC tissues and has a relationship with the prognosis of HCC patients.
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Zhang C, Wang H, Deng M, He L, Ping F, He Y, Fan Z, Cheng B, Xia J. Upregulated miR‑411‑5p levels promote lymph node metastasis by targeting RYBP in head and neck squamous cell carcinoma. Int J Mol Med 2021; 47:36. [PMID: 33537835 PMCID: PMC7891818 DOI: 10.3892/ijmm.2021.4869] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Accepted: 12/15/2020] [Indexed: 01/01/2023] Open
Abstract
Metastasis is the primary cause of the high mortality rates in head and neck squamous cell carcinoma (HNSCC). MicroRNA (miR)‑411‑5p has been discovered to serve an important role in cancer metastases. However, to the best of our knowledge, the association between miR‑411‑5p expression levels and HNSCC metastasis has not been thoroughly investigated. The present study aimed to research the function of miR‑411‑5p in HNSCC metastasis. The results of the present study revealed that miR‑411‑5p expression levels were upregulated in patients with HNSCC with lymph node metastasis and the upregulated expression levels of miR‑411‑5p were positively associated with the metastatic potential of HNSCC. Moreover, miR‑411‑5p promoted HNSCC cell migration, invasion and epithelial‑mesenchymal transition (EMT). The results of the dual‑luciferase reporter assays identified RING1 and YY1 binding protein (RYBP) as a functional downstream target gene for miR‑411‑5p. Therefore, whether miR‑411‑5p downregulated the expression levels of RYBP in HNSCC cells was subsequently investigated. Notably, the silencing of RYBP expression restored the stimulatory effects of miR‑411‑5p on HNSCC cell migration, invasion and EMT. In addition, the mRNA expression levels of miR‑411‑5p and RYBP were found to be inversely correlated in HNSCC samples. In conclusion, the results of the present study indicated that the miR‑411‑5p‑mediated downregulation of RYBP expression levels may exert an important role in HNSCC metastasis and may provide a novel target for the treatment of HNSCC.
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Affiliation(s)
- Chi Zhang
- Department of Oral Medicine, Hospital of Stomatology, Sun Yat‑Sen University, Guangzhou, Guangdong 510055, P.R. China
| | - Hongfei Wang
- Department of Oral Medicine, Hospital of Stomatology, Sun Yat‑Sen University, Guangzhou, Guangdong 510055, P.R. China
| | - Miao Deng
- Department of Oral Medicine, Hospital of Stomatology, Sun Yat‑Sen University, Guangzhou, Guangdong 510055, P.R. China
| | - Lihong He
- Department of Oral Medicine, Hospital of Stomatology, Sun Yat‑Sen University, Guangzhou, Guangdong 510055, P.R. China
| | - Fan Ping
- Department of Oral Medicine, Hospital of Stomatology, Sun Yat‑Sen University, Guangzhou, Guangdong 510055, P.R. China
| | - Yuan He
- Department of Oral Medicine, Hospital of Stomatology, Sun Yat‑Sen University, Guangzhou, Guangdong 510055, P.R. China
| | - Zhaona Fan
- Department of Oral Medicine, Hospital of Stomatology, Sun Yat‑Sen University, Guangzhou, Guangdong 510055, P.R. China
| | - Bin Cheng
- Department of Oral Medicine, Hospital of Stomatology, Sun Yat‑Sen University, Guangzhou, Guangdong 510055, P.R. China
| | - Juan Xia
- Department of Oral Medicine, Hospital of Stomatology, Sun Yat‑Sen University, Guangzhou, Guangdong 510055, P.R. China
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Wang J, He H, Jiang Q, Wang Y, Jia S. CBX6 Promotes HCC Metastasis Via Transcription Factors Snail/Zeb1-Mediated EMT Mechanism. Onco Targets Ther 2020; 13:12489-12500. [PMID: 33311989 PMCID: PMC7727033 DOI: 10.2147/ott.s257363] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Accepted: 10/22/2020] [Indexed: 11/23/2022] Open
Abstract
Purpose Hepatocellular carcinoma (HCC) is the most common malignant tumor worldwide with high morbidity and mortality rates. We aimed to examine the expression of chromobox 6 (CBX6) in HCC and analyze its correlation with clinicopathological features of HCC patients. Moreover, the role of CBX6 in the HCC cell proliferation, invasion and metastasis and the potential mechanism underlying HCC metastasis were also investigated. Methods We used quantitative polymerase chain reaction (qRT-PCR) and Western blot to evaluate the expression levels of CBX6 in HCC cell lines. Furthermore, the expression of CBX6 in HCC and the adjacent non-tumor tissues was assessed by immunohistochemistry (IHC). Cell proliferation was evaluated using MTT assay, cell migration and invasion were measured using wound healing and transwell assays. Finally, we detected the expression of target proteins in HCC cell lines transfected with CBX6 overexpression plasmid or CBX6 shRNA plasmid by Western blot. Results We found that the expression of CBX6 was increased in 280 cases of HCC tissues compared that in adjacent non-tumor tissues. HCC patients with high CBX6 expression had a higher tendency to have high growth rate, strong invasion ability, high clinical stage and poor tumor differentiation. Functional study demonstrated that the upregulation of CBX6 promotes proliferation, migration and invasion of HCC cells while silencing CBX6 in HCC cells significantly inhibited cell proliferation, migration and invasion. Furthermore, CBX6 could accelerate the EMT process in HCC cells by upregulating the expression of snail and zeb1. Conclusion CBX6 played an important role in the process of tumorigenesis and progression in HCC and enhanced the invasion and metastasis ability of HCC cells through regulating transcription factors snail/zeb1-mediated EMT mechanism, which indicated that the protein could serve as a novel therapeutic target for the treatment of HCC.
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Affiliation(s)
- Jiamu Wang
- Liaocheng Peoples' Hospital, Liaocheng 252000, People's Republic of China
| | - Hui He
- Liaocheng Peoples' Hospital, Liaocheng 252000, People's Republic of China
| | - Qiucheng Jiang
- Liaocheng Peoples' Hospital, Liaocheng 252000, People's Republic of China
| | - Yu Wang
- Liaocheng Peoples' Hospital, Liaocheng 252000, People's Republic of China
| | - Shuzhao Jia
- Liaocheng Peoples' Hospital, Liaocheng 252000, People's Republic of China
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RYBP inhibits esophageal squamous cell carcinoma proliferation through downregulating CDC6 and CDC45 in G1-S phase transition process. Life Sci 2020; 250:117578. [PMID: 32209426 DOI: 10.1016/j.lfs.2020.117578] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Revised: 03/18/2020] [Accepted: 03/18/2020] [Indexed: 12/21/2022]
Abstract
AIMS RING1 and YY1-binding protein (RYBP) is an epigenetic regulator and plays crucial roles in embryonic development. The anti-tumor effect of RYBP has been reported in several cancers recently, but the role of RYBP in esophageal squamous cell carcinoma (ESCC) has not been fully elucidated. The present study aimed to investigate the biological function and the underlying molecular mechanisms of RYBP in ESCC. MATERIALS AND METHODS We detected the expression of RYBP in ESCC tissue microarrays (TMA) by immunohistochemistry. Cell proliferation was assessed by CCK8 and colony formation assays. Cell cycle was analyzed by flow cytometry. Gene expression was determined by transcriptome arrays, quantitative real-time PCR (qRT-PCR) and Western blot. Four-week-old male nude mice were used to evaluate the effect of RYBP in ESCC growth. KEY FINDINGS We found that RYBP was downregulated in ESCC compared with adjacent normal tissues. A high level of RYBP expression predicted a better outcome of ESCC patients. Furthermore, overexpression of RYBP inhibited ESCC growth both in vitro and in vivo. Transcriptome arrays and functional studies showed that RYBP decreased the expression of genes related to cell cycles, especially CDC6 and CDC45, which were essential to initiate the DNA replication and G1-S transition. SIGNIFICANCE Taken together, our study suggests that RYBP suppresses ESCC proliferation by downregulating CDC6 and CDC45, thus inhibiting the G1-S transition.
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Zhu X, Luo W, Bei C, Kong J, Zhang S, Fu Y, Li D, Tan S. Correlations between chromobox homolog 8 and key factors of epithelial-mesenchymal transition in hepatocellular carcinoma. Cancer Cell Int 2019; 19:340. [PMID: 31889893 PMCID: PMC6916084 DOI: 10.1186/s12935-019-1063-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Accepted: 12/09/2019] [Indexed: 02/07/2023] Open
Abstract
Background Hepatocellular carcinoma (HCC) is one of the most common malignancies worldwide, especially in China, with high metastasis and poor prognosis. Recently, as the core component of the polycomb repressive complexes 1 (PRC1), chromobox protein homolog 8 (CBX8) is considered as an oncogene and prognostic marker in HCC. Methods A tissue microarray of 166 paired HCC and adjacent non-tumor samples were collected to identify the relationship between CBX8 and epithelial mesenchymal transition (EMT) associated proteins by Spearman correlation analysis. Knock-down of CBX8 in HCC cells was conducted to detect the biologic functions of CBX8 in HCC metastasis. Results We found out that CBX8 was over-expressed in HCC and its expression was closely related to the metastasis of HCC patients. In addition, knock-down of CBX8 was found to inhibit the invasion and migration ability of HCC cells. Moreover, there was a significant relationship between expression of CBX8 and EMT associated proteins both in HCC cells and tumor tissues. Conclusions Our results indicate that CBX8 promotes metastasis of HCC by inducing EMT process.
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Affiliation(s)
- Xiaonian Zhu
- 1Department of Epidemiology and Health Statistics, School of Public Health, Guilin Medical University, 109 Huancheng North Road 2, Guilin, 541004 Guangxi People's Republic of China
| | - Wei Luo
- 2Nanchong Central Hospital, The Second Clinical College of North Sichuan Medical College, Nanchong, 637000 Sichuan People's Republic of China
| | - Chunhua Bei
- 1Department of Epidemiology and Health Statistics, School of Public Health, Guilin Medical University, 109 Huancheng North Road 2, Guilin, 541004 Guangxi People's Republic of China
| | - Juan Kong
- 1Department of Epidemiology and Health Statistics, School of Public Health, Guilin Medical University, 109 Huancheng North Road 2, Guilin, 541004 Guangxi People's Republic of China
| | - Shidong Zhang
- 1Department of Epidemiology and Health Statistics, School of Public Health, Guilin Medical University, 109 Huancheng North Road 2, Guilin, 541004 Guangxi People's Republic of China
| | - Yuanyuan Fu
- 1Department of Epidemiology and Health Statistics, School of Public Health, Guilin Medical University, 109 Huancheng North Road 2, Guilin, 541004 Guangxi People's Republic of China
| | - Di Li
- 1Department of Epidemiology and Health Statistics, School of Public Health, Guilin Medical University, 109 Huancheng North Road 2, Guilin, 541004 Guangxi People's Republic of China
| | - Shengkui Tan
- 1Department of Epidemiology and Health Statistics, School of Public Health, Guilin Medical University, 109 Huancheng North Road 2, Guilin, 541004 Guangxi People's Republic of China
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Down-regulation of lncRNA XIST inhibits cell proliferation via regulating miR-744/RING1 axis in non-small cell lung cancer. Clin Sci (Lond) 2019; 133:1567-1579. [PMID: 31292221 DOI: 10.1042/cs20190519] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Revised: 07/09/2019] [Accepted: 07/10/2019] [Indexed: 12/24/2022]
Abstract
Abstract
Long non-coding RNAs (lncRNAs) are known to be potential factors in promoting tumor progression. However, the function and mechanism of lncRNA XIST in non-small cell lung cancer (NSCLC) remains poorly understood. The expression levels of lncRNA XIST in NSCLC tissues and cell lines were detected with real-time PCR, and the correlation of the expression level of XIST with histopathological characteristics and prognosis was analyzed. The biological function of lncRNA XIST was validated through assays in vivo and in vitro. The expression of lncRNA XIST was significantly up-regulated in NSCLC tissues. In addition, overexpression of XIST was positively correlated with the advanced clinical status of tumors, as well as poor overall survival and DFS. A tumor suppressive effect was presented via functional knockdown of lncRNA XIST. Up-regulation of XIST enhanced the proliferation, migration, and invasion ability of NSCLC cells both in vivo and in vitro. Mechanically, it was indicated that XIST could serve as an endogenous competitive RNA modulating miR-744, leading to the miR-744/RING1 signaling pathway inhibition and Wnt/β-catenin signaling pathway activation. Taken together, it was confirmed here that XIST overexpression is associated with tumor progression phenotype and the newly discovered XIST/miR-744/RING1 axis, which could serve as a potential biomarker and therapeutic target for NSCLC.
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Zhu X, Qin M, Li C, Zeng W, Bei C, Tan C, Zhang Y, Shi W, Kong J, Fu Y, Tan S. Downregulated Expression of Chromobox Homolog 7 in Hepatocellular Carcinoma. Genet Test Mol Biomarkers 2019; 23:348-352. [PMID: 30990338 DOI: 10.1089/gtmb.2018.0293] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Background: As an essential member of the Polycomb group (PcG) proteins, chromobox homolog 7 (CBX7) is found deregulated in some human cancers, and is thought to be a contributing factor in carcinogenesis. However, the expression and role of CBX7 in hepatocellular carcinoma (HCC) is still not well characterized. Materials and Methods: The levels of the CBX7 protein were quantified in 75 paired HCC and adjacent nontumor tissues by immunohistochemistry; comparisons were made using McNemar's chi-square test. The Kaplan-Meier estimate was used for survival analysis. Results: We found that the expression of CBX7 in HCC tissues was significantly lower than that of adjacent nontumor tissues. In addition, decreased CBX7 expression levels were correlated with liver cirrhosis in HCC patients. Furthermore, the survival times of HCC patients who were CBX7-expression-negative were shorter than HCC patients who were CBX7-expression-positive. Conclusion: Our results show that downregulation of CBX7 is related to HCC progression and a poor prognosis in HCC patients.
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Affiliation(s)
- Xiaonian Zhu
- 1 Department of Epidemiology and Statistics, School of Public Health, Guilin Medical University, Guilin, P.R. China
| | - Mingqun Qin
- 2 Department of Stomatology, School of Stomatology, Guilin Medical University, Guilin, P.R. China
| | - Cong Li
- 1 Department of Epidemiology and Statistics, School of Public Health, Guilin Medical University, Guilin, P.R. China
| | - Wen Zeng
- 1 Department of Epidemiology and Statistics, School of Public Health, Guilin Medical University, Guilin, P.R. China
| | - Chunhua Bei
- 1 Department of Epidemiology and Statistics, School of Public Health, Guilin Medical University, Guilin, P.R. China
| | - Chao Tan
- 1 Department of Epidemiology and Statistics, School of Public Health, Guilin Medical University, Guilin, P.R. China
| | - Ying Zhang
- 1 Department of Epidemiology and Statistics, School of Public Health, Guilin Medical University, Guilin, P.R. China
| | - Wenxiang Shi
- 1 Department of Epidemiology and Statistics, School of Public Health, Guilin Medical University, Guilin, P.R. China
| | - Juan Kong
- 1 Department of Epidemiology and Statistics, School of Public Health, Guilin Medical University, Guilin, P.R. China
| | - Yuanyuan Fu
- 1 Department of Epidemiology and Statistics, School of Public Health, Guilin Medical University, Guilin, P.R. China
| | - Shengkui Tan
- 1 Department of Epidemiology and Statistics, School of Public Health, Guilin Medical University, Guilin, P.R. China
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Tong AH, Tan J, Zhang JH, Xu FJ, Li FY, Cao CY. Overexpression of RYBP inhibits proliferation, invasion, and chemoresistance to cisplatin in anaplastic thyroid cancer cells via the EGFR pathway. J Biochem Mol Toxicol 2018; 33:e22241. [PMID: 30431689 DOI: 10.1002/jbt.22241] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Revised: 08/19/2018] [Accepted: 09/07/2018] [Indexed: 12/28/2022]
Affiliation(s)
- Ai-Hua Tong
- Department of Endocrinology; Linyi Central Hospital; Linyi City China
| | - Juan Tan
- Department of Endocrinology; Linyi Central Hospital; Linyi City China
| | - Jin-Hua Zhang
- Department of Endocrinology; Linyi Central Hospital; Linyi City China
| | - Fang-Jiang Xu
- Department of Endocrinology; Linyi Central Hospital; Linyi City China
| | - Fu-Yuan Li
- Department of Endocrinology; Linyi Central Hospital; Linyi City China
| | - Chun-Yu Cao
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences; Beijing China
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Epigenetic and non-epigenetic functions of the RYBP protein in development and disease. Mech Ageing Dev 2018; 174:111-120. [DOI: 10.1016/j.mad.2018.03.011] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Revised: 03/22/2018] [Accepted: 03/26/2018] [Indexed: 12/30/2022]
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Zhan S, Wang T, Ge W, Li J. Multiple roles of Ring 1 and YY1 binding protein in physiology and disease. J Cell Mol Med 2018; 22:2046-2054. [PMID: 29383875 PMCID: PMC5867070 DOI: 10.1111/jcmm.13503] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2017] [Accepted: 11/16/2017] [Indexed: 12/17/2022] Open
Abstract
Ring 1 and YY1 binding protein (RYBP) was first identified in 1999, and its structure includes a conserved Npl4 Zinc finger motif at the N‐terminus, a central region that is characteristically enriched with arginine and lysine residues and a C‐terminal region enriched with serine and threonine amino acids. Over nearly 20 years, multiple studies have found that RYBP functions as an organ developmental adaptor. There is also evidence that RYBP regulates the expression of different genes involved in various aspects of biological processes, via a mechanism that is dependent on interactions with components of PcG complexes and/or through binding to different transcriptional factors. In addition, RYBP interacts directly or indirectly with apoptosis‐associated proteins to mediate anti‐apoptotic or pro‐apoptotic activity in both the cytoplasm and nucleus of various cell types. Furthermore, RYBP has also been shown to act as tumour suppressor gene in different solid tumours, but as an oncogene in lymphoma and melanoma. In this review, we summarize our current understanding of the functions of this multifaceted RYBP in physiological and pathological conditions, including embryonic development, apoptosis and cancer, as well as its role as a component of polycomb repressive complex 1.
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Affiliation(s)
- Shaohua Zhan
- National Center for Clinical Laboratories, Beijing Hospital, National Center of Gerontology, Beijing, China.,National Key Laboratory of Medical Molecular Biology & Department of Immunology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, Beijing, China
| | - Tianxiao Wang
- Key Laboratory of Carcinogenesis and Translational Research, Department of Head and Neck Surgery, Peking University Cancer Hospital & Institute, Beijing, China
| | - Wei Ge
- National Key Laboratory of Medical Molecular Biology & Department of Immunology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, Beijing, China
| | - Jinming Li
- National Center for Clinical Laboratories, Beijing Hospital, National Center of Gerontology, Beijing, China
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Associations between single nucleotide polymorphisms in RYBP and the prognosis of hepatocellular carcinoma in a Chinese population. Carcinogenesis 2017; 38:532-540. [DOI: 10.1093/carcin/bgx031] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2017] [Accepted: 03/20/2017] [Indexed: 12/13/2022] Open
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