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Wang Y, Liu Y, Chen H, Xu Z, Jiang W, Xu X, Shan J, Chang J, Zhou T, Wang J, Chenyan A, Fan S, Tao Z, Shao K, Li X, Chen X, Ji G, Wu X. PIN1 promotes the metastasis of cholangiocarcinoma cells by RACK1-mediated phosphorylation of ANXA2. Cell Oncol (Dordr) 2024:10.1007/s13402-024-00924-y. [PMID: 38386231 DOI: 10.1007/s13402-024-00924-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/26/2024] [Indexed: 02/23/2024] Open
Abstract
BACKGROUND Cholangiocarcinoma (CCA), a primary hepatobiliary malignancy, is characterized by a poor prognosis and a lack of effective treatments. Therefore, the need to explore novel therapeutic approaches is urgent. While the role of Peptidylprolyl Cis/Trans Isomerase, NIMA-Interacting 1 (PIN1) has been extensively studied in various tumor types, its involvement in CCA remains poorly understood. METHODS In this study, we employed tissue microarray (TMA), reverse transcription-polymerase chain reaction (RT-PCR), and The Cancer Genome Atlas (TCGA) database to assess the expression of PIN1. Through in vitro and in vivo functional experiments, we investigated the impact of PIN1 on the adhesion and metastasis of CCA. Additionally, we explored downstream molecular pathways using RNA-seq, western blotting, co-immunoprecipitation, immunofluorescence, and mass spectrometry techniques. RESULTS Our findings revealed a negative correlation between PIN1 overexpression and prognosis in CCA tissues. Furthermore, high PIN1 expression promoted CCA cell proliferation and migration. Mechanistically, PIN1 functioned as an oncogene by regulating ANXA2 phosphorylation, thereby promoting CCA adhesion. Notably, the interaction between PIN1 and ANXA2 was facilitated by RACK1. Importantly, pharmacological inhibition of PIN1 using the FDA-approved drug all-trans retinoic acid (ATRA) effectively suppressed the metastatic potential of CCA cells in a nude mouse lung metastasis model. CONCLUSION Overall, our study emphasizes the critical role of the PIN1/RACK1/ANXA2 complex in CCA growth and functionality, highlighting the potential of targeting PIN1 as a promising therapeutic strategy for CCA.
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Affiliation(s)
- Yuming Wang
- Hepatobiliary Center, The First Affiliated Hospital of Nanjing Medical University; Key Laboratory of Liver Transplantation, Chinese Academy of Medical Sciences; NHC Key Laboratory of Living Donor Liver Transplantation (Nanjing Medical University), 300 Guangzhou Road, Nanjing, China
- Jiangsu Provincial Medical Innovation Center; Jiangsu Provincial Medical Key Laboratory, Nanjing, China
| | - Yiwei Liu
- Hepatobiliary Center, The First Affiliated Hospital of Nanjing Medical University; Key Laboratory of Liver Transplantation, Chinese Academy of Medical Sciences; NHC Key Laboratory of Living Donor Liver Transplantation (Nanjing Medical University), 300 Guangzhou Road, Nanjing, China
- Jiangsu Provincial Medical Innovation Center; Jiangsu Provincial Medical Key Laboratory, Nanjing, China
| | - Hairong Chen
- Department of Occupational Medicine and Environmental Health, School of Public Health, Nanjing Medical University, Nanjing, China
| | - Zhenggang Xu
- Hepatobiliary Center, The First Affiliated Hospital of Nanjing Medical University; Key Laboratory of Liver Transplantation, Chinese Academy of Medical Sciences; NHC Key Laboratory of Living Donor Liver Transplantation (Nanjing Medical University), 300 Guangzhou Road, Nanjing, China
- Jiangsu Provincial Medical Innovation Center; Jiangsu Provincial Medical Key Laboratory, Nanjing, China
| | - Wangjie Jiang
- Hepatobiliary Center, The First Affiliated Hospital of Nanjing Medical University; Key Laboratory of Liver Transplantation, Chinese Academy of Medical Sciences; NHC Key Laboratory of Living Donor Liver Transplantation (Nanjing Medical University), 300 Guangzhou Road, Nanjing, China
- Jiangsu Provincial Medical Innovation Center; Jiangsu Provincial Medical Key Laboratory, Nanjing, China
| | - Xiao Xu
- Hepatobiliary Center, The First Affiliated Hospital of Nanjing Medical University; Key Laboratory of Liver Transplantation, Chinese Academy of Medical Sciences; NHC Key Laboratory of Living Donor Liver Transplantation (Nanjing Medical University), 300 Guangzhou Road, Nanjing, China
- Jiangsu Provincial Medical Innovation Center; Jiangsu Provincial Medical Key Laboratory, Nanjing, China
| | - Jijun Shan
- Hepatobiliary Center, The First Affiliated Hospital of Nanjing Medical University; Key Laboratory of Liver Transplantation, Chinese Academy of Medical Sciences; NHC Key Laboratory of Living Donor Liver Transplantation (Nanjing Medical University), 300 Guangzhou Road, Nanjing, China
- Jiangsu Provincial Medical Innovation Center; Jiangsu Provincial Medical Key Laboratory, Nanjing, China
| | - Jiang Chang
- Hepatobiliary Center, The First Affiliated Hospital of Nanjing Medical University; Key Laboratory of Liver Transplantation, Chinese Academy of Medical Sciences; NHC Key Laboratory of Living Donor Liver Transplantation (Nanjing Medical University), 300 Guangzhou Road, Nanjing, China
- Jiangsu Provincial Medical Innovation Center; Jiangsu Provincial Medical Key Laboratory, Nanjing, China
| | - Tao Zhou
- Hepatobiliary Center, The First Affiliated Hospital of Nanjing Medical University; Key Laboratory of Liver Transplantation, Chinese Academy of Medical Sciences; NHC Key Laboratory of Living Donor Liver Transplantation (Nanjing Medical University), 300 Guangzhou Road, Nanjing, China
- Jiangsu Provincial Medical Innovation Center; Jiangsu Provincial Medical Key Laboratory, Nanjing, China
| | - Jifei Wang
- Hepatobiliary Center, The First Affiliated Hospital of Nanjing Medical University; Key Laboratory of Liver Transplantation, Chinese Academy of Medical Sciences; NHC Key Laboratory of Living Donor Liver Transplantation (Nanjing Medical University), 300 Guangzhou Road, Nanjing, China
- Jiangsu Provincial Medical Innovation Center; Jiangsu Provincial Medical Key Laboratory, Nanjing, China
| | - Anlan Chenyan
- Hepatobiliary Center, The First Affiliated Hospital of Nanjing Medical University; Key Laboratory of Liver Transplantation, Chinese Academy of Medical Sciences; NHC Key Laboratory of Living Donor Liver Transplantation (Nanjing Medical University), 300 Guangzhou Road, Nanjing, China
- Jiangsu Provincial Medical Innovation Center; Jiangsu Provincial Medical Key Laboratory, Nanjing, China
| | - Shilong Fan
- Hepatobiliary Center, The First Affiliated Hospital of Nanjing Medical University; Key Laboratory of Liver Transplantation, Chinese Academy of Medical Sciences; NHC Key Laboratory of Living Donor Liver Transplantation (Nanjing Medical University), 300 Guangzhou Road, Nanjing, China
- Jiangsu Provincial Medical Innovation Center; Jiangsu Provincial Medical Key Laboratory, Nanjing, China
| | - Zifan Tao
- Hepatobiliary Center, The First Affiliated Hospital of Nanjing Medical University; Key Laboratory of Liver Transplantation, Chinese Academy of Medical Sciences; NHC Key Laboratory of Living Donor Liver Transplantation (Nanjing Medical University), 300 Guangzhou Road, Nanjing, China
- Jiangsu Provincial Medical Innovation Center; Jiangsu Provincial Medical Key Laboratory, Nanjing, China
| | - Ke Shao
- Hepatobiliary Center, The First Affiliated Hospital of Nanjing Medical University; Key Laboratory of Liver Transplantation, Chinese Academy of Medical Sciences; NHC Key Laboratory of Living Donor Liver Transplantation (Nanjing Medical University), 300 Guangzhou Road, Nanjing, China
- Jiangsu Provincial Medical Innovation Center; Jiangsu Provincial Medical Key Laboratory, Nanjing, China
| | - Xiangcheng Li
- Hepatobiliary Center, The First Affiliated Hospital of Nanjing Medical University; Key Laboratory of Liver Transplantation, Chinese Academy of Medical Sciences; NHC Key Laboratory of Living Donor Liver Transplantation (Nanjing Medical University), 300 Guangzhou Road, Nanjing, China
- Jiangsu Provincial Medical Innovation Center; Jiangsu Provincial Medical Key Laboratory, Nanjing, China
| | - Xiaofeng Chen
- Department of Oncology, Jiangsu Province Hospital, The First Affiliated Hospital, Nanjing Medical University, 300 Guangzhou Road, Nanjing, China.
| | - Guwei Ji
- Hepatobiliary Center, The First Affiliated Hospital of Nanjing Medical University; Key Laboratory of Liver Transplantation, Chinese Academy of Medical Sciences; NHC Key Laboratory of Living Donor Liver Transplantation (Nanjing Medical University), 300 Guangzhou Road, Nanjing, China.
- Jiangsu Provincial Medical Innovation Center; Jiangsu Provincial Medical Key Laboratory, Nanjing, China.
| | - Xiaofeng Wu
- Hepatobiliary Center, The First Affiliated Hospital of Nanjing Medical University; Key Laboratory of Liver Transplantation, Chinese Academy of Medical Sciences; NHC Key Laboratory of Living Donor Liver Transplantation (Nanjing Medical University), 300 Guangzhou Road, Nanjing, China.
- Jiangsu Provincial Medical Innovation Center; Jiangsu Provincial Medical Key Laboratory, Nanjing, China.
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Ou H, Wang L, Xi Z, Shen H, Jiang Y, Zhou F, Liu Y, Zhou Y. MYO10 contributes to the malignant phenotypes of colorectal cancer via RACK1 by activating integrin/Src/FAK signaling. Cancer Sci 2022; 113:3838-3851. [PMID: 35912545 DOI: 10.1111/cas.15519] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Revised: 07/13/2022] [Accepted: 07/20/2022] [Indexed: 11/28/2022] Open
Abstract
Liver metastases still remain a major cause of colorectal cancer (CRC) patient death. MYO10 is upregulated in several tumor types, however, its significance and the underlying mechanism in CRC is not entirely clear. Here we found that MYO10 was highly expressed in CRC tumor tissues, especially in liver metastasis tissues. MYO10 knockout reduced CRC cell proliferation, invasion, and migration in vitro, and CRC metastasis in vivo. We identified RACK1 by LC-MS/MS and demonstrated that MYO10 interacts with and stabilizes RACK1. Mechanistically, MYO10 promotes CRC cell progression and metastasis via ubiquitination-mediated RACK1 degradation and integrin/Src/FAK signaling activation. Therefore, the MYO10/RACK1/integrin/Src/FAK axis may play an important role in CRC progression and metastasis.
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Affiliation(s)
- Haibin Ou
- Department of Radiation and Medical Oncology, Zhongnan Hospital, Wuhan University, Wuhan, China.,Hubei Key Laboratory of Tumor Biological Behaviors, Zhongnan Hospital, Wuhan University, Wuhan, China
| | - Lili Wang
- Department of Radiation and Medical Oncology, Zhongnan Hospital, Wuhan University, Wuhan, China.,Hubei Key Laboratory of Tumor Biological Behaviors, Zhongnan Hospital, Wuhan University, Wuhan, China
| | - Ziyao Xi
- Department of Radiation and Medical Oncology, Zhongnan Hospital, Wuhan University, Wuhan, China.,Hubei Key Laboratory of Tumor Biological Behaviors, Zhongnan Hospital, Wuhan University, Wuhan, China
| | - Hui Shen
- Department of Radiation and Medical Oncology, Zhongnan Hospital, Wuhan University, Wuhan, China.,Hubei Key Laboratory of Tumor Biological Behaviors, Zhongnan Hospital, Wuhan University, Wuhan, China
| | - Yaofei Jiang
- Department of Radiation and Medical Oncology, Zhongnan Hospital, Wuhan University, Wuhan, China.,Hubei Key Laboratory of Tumor Biological Behaviors, Zhongnan Hospital, Wuhan University, Wuhan, China
| | - Fuxiang Zhou
- Department of Radiation and Medical Oncology, Zhongnan Hospital, Wuhan University, Wuhan, China.,Hubei Key Laboratory of Tumor Biological Behaviors, Zhongnan Hospital, Wuhan University, Wuhan, China
| | - Yu Liu
- Department of Radiation and Medical Oncology, Zhongnan Hospital, Wuhan University, Wuhan, China.,Hubei Key Laboratory of Tumor Biological Behaviors, Zhongnan Hospital, Wuhan University, Wuhan, China
| | - Yunfeng Zhou
- Department of Radiation and Medical Oncology, Zhongnan Hospital, Wuhan University, Wuhan, China.,Hubei Key Laboratory of Tumor Biological Behaviors, Zhongnan Hospital, Wuhan University, Wuhan, China
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Zhu L, Chen W, Li G, Chen H, Liao W, Zhang L, Xiao X. Upregulated RACK1 attenuates gastric cancer cell growth and epithelial-mesenchymal transition via suppressing Wnt/β-catenin signaling. Onco Targets Ther 2019; 12:4795-4805. [PMID: 31417279 PMCID: PMC6592218 DOI: 10.2147/ott.s205869] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Accepted: 04/29/2019] [Indexed: 12/20/2022] Open
Abstract
Purpose: As there have been few studies on the effects of the receptor for activated C kinase 1 (RACK1) on gastric cancer (GC), we aimed to explore such effects and the mechanism that may be involved. Patients and methods: Normal gastric epithelial cells and six GC cell lines were used to detect the mRNA expression of RACK1. Overexpressing RACK1 was transfected in HGC27 and MGC803 cells. The effects of overexpressing RACK1 on cell viability, migration, and invasion were determined by cell counting kit-8, wound scratch, and Transwell assay, respectively. The expressions of epithelial–mesenchymal transition (EMT) and Wnt/β-catenin signaling related genes were detected using quantitative real-time PCR or Western blot. Wnt pathway agonist LiCl was added into RACK1 overexpressing GC cells, and then cell viability, migration, and invasion were also detected. Results: RACK1 was downregulated in GC cell lines. Under the circumstance that overexpressing RACK1 was successfully transfected in the two lowest RACK1-expressing GC cells, significant inhibition of cell viability, migration, and invasion, promotion to the mRNA and protein expression of E-cadherin, as well as a decrease in the N-cadherin and Snail expressions could be observed. Overexpressing RACK1 also enhanced the protein level of phosphorylation-β-catenin/β-catenin and attenuated c-Jun protein expression. Additionally, LiCl could partially reverse the inhibitory effects of cell viability, migration and invasion by overexpressing RACK. Conclusion: We found RACK1 possibly inhibited epithelial–mesenchymal transition of GC cells through limitation of the Wnt/β-catenin pathway, thereby suppressing cell migration and invasion; RACK1 could also suppress cell growth.
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Affiliation(s)
- Lihui Zhu
- Department of Gastroenterology, The Second Hospital Affiliated to the University of South China, Hengyang, Hunan Province, People's Republic of China
| | - Wen Chen
- Department of Gastroenterology, The Second Hospital Affiliated to the University of South China, Hengyang, Hunan Province, People's Republic of China
| | - Guoqing Li
- Department of Gastroenterology, The Second Hospital Affiliated to the University of South China, Hengyang, Hunan Province, People's Republic of China
| | - Honghui Chen
- Department of Gastroenterology, The Second Hospital Affiliated to the University of South China, Hengyang, Hunan Province, People's Republic of China
| | - Wenqiu Liao
- Department of Gastroenterology, The Second Hospital Affiliated to the University of South China, Hengyang, Hunan Province, People's Republic of China
| | - Li Zhang
- Department of Gastroenterology, The Second Hospital Affiliated to the University of South China, Hengyang, Hunan Province, People's Republic of China
| | - Xiaoli Xiao
- Department of Gastroenterology, The Second Hospital Affiliated to the University of South China, Hengyang, Hunan Province, People's Republic of China
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4
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Hu Y, Liu JP, Li XY, Cai Y, He C, Li NS, Xie C, Xiong ZJ, Ge ZM, Lu NH, Zhu Y. Downregulation of tumor suppressor RACK1 by Helicobacter pylori infection promotes gastric carcinogenesis through the integrin β-1/NF-κB signaling pathway. Cancer Lett 2019; 450:144-154. [PMID: 30849478 DOI: 10.1016/j.canlet.2019.02.039] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Revised: 02/12/2019] [Accepted: 02/13/2019] [Indexed: 12/24/2022]
Abstract
Receptor of activated protein kinase C 1 (RACK1) is downregulated in gastric cancer and is involved in modulating NF-κB signaling pathway activity. However, the underlying molecular mechanisms regulating RACK1 expression are unclear. In this study, we demonstrated that downregulated expression of RACK1 was observed in gastric cancer tissue compared to adjacent normal tissue and was correlated with poor prognosis in patients. Helicobacter pylori (H. pylori) infection downregulated RACK1 expression in concert with canonical NF-κB signaling pathway activation in vivo and in vitro. RACK1 overexpression suppressed NF-κB signaling pathway activation as well as the release of downstream proinflammatory cytokines. In addition, RACK1 downregulation increased integrin β-1 expression, while integrin β-1 silencing decreased NF-κB signaling activation. Moreover, H. pylori infection downregulated RACK1 but upregulated integrin β-1 expression at the precancerous lesion stages in human subjects. Our data indicate that H. pylori infection promotes the upregulation of integrin β-1 expression via downregulation of RACK1 expression, which subsequently leads to the elevated activation of the NF-κB signaling pathway, an essential step in H. pylori-induced carcinogenesis.
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Affiliation(s)
- Yi Hu
- Department of Gastroenterology, The First Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi Province, China.
| | - Jian-Ping Liu
- Integrated Cardio Metabolic Centre, Karolinska Institute, Huddinge, Sweden.
| | - Xue-Yang Li
- Department of Gastroenterology, The First Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi Province, China.
| | - Yan Cai
- Department of Gastroenterology, The First Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi Province, China.
| | - Cong He
- Department of Gastroenterology, The First Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi Province, China.
| | - Nian-Shuang Li
- Department of Gastroenterology, The First Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi Province, China.
| | - Chuan Xie
- Department of Gastroenterology, The First Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi Province, China.
| | - Zhi-Juan Xiong
- Department of Gastroenterology, The First Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi Province, China.
| | - Zhong-Ming Ge
- Division of Comparative Medicine, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, 02139, USA.
| | - Nong-Hua Lu
- Department of Gastroenterology, The First Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi Province, China.
| | - Yin Zhu
- Department of Gastroenterology, The First Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi Province, China.
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5
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Zhou C, Chen T, Xie Z, Qin Y, Ou Y, Zhang J, Li S, Chen R, Zhong N. RACK1 forms a complex with FGFR1 and PKM2, and stimulates the growth and migration of squamous lung cancer cells. Mol Carcinog 2017; 56:2391-2399. [PMID: 28418088 DOI: 10.1002/mc.22663] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2016] [Revised: 03/19/2017] [Accepted: 04/13/2017] [Indexed: 12/31/2022]
Abstract
Phosphorylation of Pyruvate Kinase M2 (PKM2) on Tyr105 by fibroblast growth factor receptor 1 (FGFR1) has been shown to promote its nuclear localization as well as cell growth in lung cancer. Better understanding the regulation of this process would benefit the clinical treatment for lung cancer. Here, it has been found that the adaptor protein receptor for activated PKC kinase (RACK1) formed a complex with FGFR1 and PKM2, and activated the FGFR1/PKM2 signaling. Knocking down the expression of RACK1 impaired the phosphorylation on Tyr105 of PKM2 and inhibited the growth and migration of lung cancer cells, while over-expression of RACK1 in lung cancer cells led to the resistance to Erdafitinib. Moreover, knocking down the expression of RACK1 impaired the tumorigenesis of lung cancer driven by LKB loss and mutated Ras (KrasG12D). Taken together, our study demonstrated the pivotal roles of RACK1 in FGFR1/PKM2 signaling, suggesting FGFR1/RACK1/PKM2 might be a therapeutic target for lung cancer treatment.
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Affiliation(s)
- Chengzhi Zhou
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Disease, Department of Respiratory Medicine, the First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, P. R. China
| | - Tao Chen
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Disease, Department of Respiratory Medicine, the First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, P. R. China
| | - Zhanhong Xie
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Disease, Department of Respiratory Medicine, the First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, P. R. China
| | - Yinyin Qin
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Disease, Department of Respiratory Medicine, the First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, P. R. China
| | - Yangming Ou
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Disease, Department of Respiratory Medicine, the First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, P. R. China
| | - Jiexia Zhang
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Disease, Department of Respiratory Medicine, the First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, P. R. China
| | - Shiyue Li
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Disease, Department of Respiratory Medicine, the First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, P. R. China
| | - Rongchang Chen
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Disease, Department of Respiratory Medicine, the First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, P. R. China
| | - Nanshan Zhong
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Disease, Department of Respiratory Medicine, the First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, P. R. China
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Liao S, Xiao S, Chen H, Zhang M, Chen Z, Long Y, Gao L, He J, Ge Y, Yi W, Wu M, Li G, Zhou Y. The receptor for activated protein kinase C promotes cell growth, invasion and migration in cervical cancer. Int J Oncol 2017; 51:1497-1507. [PMID: 29048616 PMCID: PMC5642390 DOI: 10.3892/ijo.2017.4137] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2017] [Accepted: 09/21/2017] [Indexed: 01/21/2023] Open
Abstract
Cervical cancer is one of the most common malignant tumors in women all over the world. However, the exact etiology of cervical cancer remains unclear. The receptor for activated protein kinase C (RACK1) is reported to be involved in tumorigenesis and tumor progression. Besides, the prognostic value of RACK1 in several kinds of tumors has been identified. However, there are limited studies on the functional role of RACK1 in cervical cancer. In this study, we tested the expression level of RACK1 by immunohistochemistry and western blot technologies and find that it is upregulated in cervical cancer. Colony formation and CCK8 assays indicate that RACK1 promotes cell proliferation in CaSki cervical cancer cells. While the silence of RACK1 decreases the cell proliferation in CCK8 analysis. β-galactosidase staining suggests that RACK1 decreases cell senescence in cervical cancer cells. Invasion and migration assay show that RACK1 promotes the invasion and migration of cervical cancer cells. Also, when RACK1 was silenced, it exerts the opposite result. Furthermore, the mRNA expression levels of MMP‑3, MMP‑9 and MMP‑10 were upregulated in RACK1‑overexpressed CaSki cells by qPCR analysis. RACK1 also induces S phase accumulation in cell cycle analysis and suppresses cell apoptosis in cervical cancer cells. Flow cytometry analysis of mitochondria functions suggests that RACK1 increases the mitochondrial membrane potential (Δψm) levels to prevent mitochondrial apoptosis in cervical cancer cells. To explore the possible mechanism of RACK1, we tested and found that RACK1 upregulates the expression of NF-κB, cyclin D1 and CDK4 and downregulates the expression of p53, p38, p21 and STAT1 in cervical cancer cells. These results suggest that RACK1 promotes cell growth and invasion and inhibits the senescence and apoptosis in cervical cancer cells probably by affecting the p53 pathway.
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Affiliation(s)
- Shan Liao
- Hunan Provincial Tumor Hospital and the Affiliated Tumor Hospital of Xiangya School of Medicine, Central South University, Changsha, Hunan
- Hunan Key Laboratory of Nonresolving Inflammation and Cancer, Disease Genome Research Center, The Third Xiangya Hospital
- The Key Laboratory of Carcinogenesis of The Chinese Ministry of Health, Xiangya Hospital
| | - Songshu Xiao
- Department of Gynecology and Obstetrics, The Third Xiangya Hospital, Central South University, Changsha, Hunan
| | - Hongxiang Chen
- The Gynecology Department, People's Hospital of Xinjiang
| | - Manying Zhang
- Hunan Provincial Tumor Hospital and the Affiliated Tumor Hospital of Xiangya School of Medicine, Central South University, Changsha, Hunan
- Hunan Key Laboratory of Nonresolving Inflammation and Cancer, Disease Genome Research Center, The Third Xiangya Hospital
| | - Zhifang Chen
- The Gynecology Department, The First Affiliated Hospital of Xinjiang Medical University, Urumchi, Xinjiang, P.R. China
| | - Yuehua Long
- Hunan Provincial Tumor Hospital and the Affiliated Tumor Hospital of Xiangya School of Medicine, Central South University, Changsha, Hunan
- Hunan Key Laboratory of Nonresolving Inflammation and Cancer, Disease Genome Research Center, The Third Xiangya Hospital
| | - Lu Gao
- Hunan Provincial Tumor Hospital and the Affiliated Tumor Hospital of Xiangya School of Medicine, Central South University, Changsha, Hunan
- Hunan Key Laboratory of Nonresolving Inflammation and Cancer, Disease Genome Research Center, The Third Xiangya Hospital
| | - Junyu He
- Hunan Provincial Tumor Hospital and the Affiliated Tumor Hospital of Xiangya School of Medicine, Central South University, Changsha, Hunan
- Hunan Key Laboratory of Nonresolving Inflammation and Cancer, Disease Genome Research Center, The Third Xiangya Hospital
| | - Yanshan Ge
- Hunan Provincial Tumor Hospital and the Affiliated Tumor Hospital of Xiangya School of Medicine, Central South University, Changsha, Hunan
- Hunan Key Laboratory of Nonresolving Inflammation and Cancer, Disease Genome Research Center, The Third Xiangya Hospital
| | - Wei Yi
- Hunan Provincial Tumor Hospital and the Affiliated Tumor Hospital of Xiangya School of Medicine, Central South University, Changsha, Hunan
- Hunan Key Laboratory of Nonresolving Inflammation and Cancer, Disease Genome Research Center, The Third Xiangya Hospital
| | - Minghua Wu
- Hunan Provincial Tumor Hospital and the Affiliated Tumor Hospital of Xiangya School of Medicine, Central South University, Changsha, Hunan
- Hunan Key Laboratory of Nonresolving Inflammation and Cancer, Disease Genome Research Center, The Third Xiangya Hospital
| | - Guiyuan Li
- Hunan Provincial Tumor Hospital and the Affiliated Tumor Hospital of Xiangya School of Medicine, Central South University, Changsha, Hunan
- Hunan Key Laboratory of Nonresolving Inflammation and Cancer, Disease Genome Research Center, The Third Xiangya Hospital
- The Key Laboratory of Carcinogenesis of The Chinese Ministry of Health, Xiangya Hospital
| | - Yanhong Zhou
- Hunan Provincial Tumor Hospital and the Affiliated Tumor Hospital of Xiangya School of Medicine, Central South University, Changsha, Hunan
- Hunan Key Laboratory of Nonresolving Inflammation and Cancer, Disease Genome Research Center, The Third Xiangya Hospital
- The Key Laboratory of Carcinogenesis of The Chinese Ministry of Health, Xiangya Hospital
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7
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RACK1 silencing attenuates renal fibrosis by inhibiting TGF-β signaling. Int J Mol Med 2017; 40:1965-1970. [PMID: 29039466 DOI: 10.3892/ijmm.2017.3154] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2016] [Accepted: 09/18/2017] [Indexed: 11/05/2022] Open
Abstract
The receptor for activated C-kinase 1 (RACK1) is a member of the WD40-repeat family of proteins and has been reported to be implicated in the development of liver fibrosis. However, the role of RACK1 in renal fibrosis remains unclear. Therefore, in this study, we investigated the effects of RACK1 on transforming growth factor-β1 (TGF-β1)-treated human proximal tubular epithelial cells and aimed to elucidate the possible mechanisms responsible for its anti-fibrotic effects. Our results revealed that RACK1 was highly expressed in the renal fibrotic tissues and TGF-β1-treated HK-2 cells. RACK1 silencing inhibited TGF-β1‑induced α-smooth muscle actin and connective tissue growth factor expression in the HK-2 cells. Furthermore, RACK1 silencing inhibited the expression of phosphorylated Smad3 in the TGF-β1-treated HK-2 cells. To the best of our knowledge, these data demonstrate for the first time the role of RACK1 in renal fibrosis. The present findings indicate that RACK1 silencing attenuates renal fibrosis by suppressing the activation of TGF-β1/Smad3 signaling pathway in HK-2 cells. Thus, RACK1 may serve as a novel regulator of renal fibrosis.
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Li Z, Jin H, Mao G, Wu L, Guo Q. Msi2 plays a carcinogenic role in esophageal squamous cell carcinoma via regulation of the Wnt/β-catenin and Hedgehog signaling pathways. Exp Cell Res 2017; 361:170-177. [PMID: 29054489 DOI: 10.1016/j.yexcr.2017.10.016] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2017] [Revised: 10/13/2017] [Accepted: 10/17/2017] [Indexed: 02/07/2023]
Abstract
Msi2 has been widely reported to be upregulated and strongly associated with fast progress and poor prognosis in many cancers. However, the expression and role of Msi2 in esophageal squamous cell carcinoma (ESCC) remain unknown. In this study, we found that Msi2 was upregulated in ESCC clinical samples, and was significantly associated with tumor size, differentiation status, and lymph node metastasis in ESCC patients. Multivariate Cox regression analysis showed that Msi2 was an independent predictor for disease-free survival (DFS) and overall survival (OS). Moreover, knockdown of Msi2 impaired ESCC cell proliferation, epithelial-mesenchymal transition (EMT) and migration, while overexpression of Msi2 promoted ESCC cell proliferation, EMT and migration in vitro. Animal experiments also confirmed that Msi2 promoted ESCC cell proliferation in vivo. Mechanistically, Msi2 promoted ESCC cell proliferation, EMT and migration via regulation of the Wnt/β-catenin and Hedgehog (Hh) signaling pathways. Taken together, our study suggested that Msi2 could serve as a candidate for diagnosis and prognosis and as a potential therapeutic target in ESCC.
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Affiliation(s)
- Zhiwei Li
- Department of Thoracic Surgery, Zhoukou Central Hospital, China
| | - Hui Jin
- Department of Thoracic Surgery, Zhoukou Central Hospital, China
| | - Guozhang Mao
- Department of Thoracic Surgery, Zhoukou Central Hospital, China
| | - Liuguang Wu
- Department of Thoracic Surgery, Zhoukou Central Hospital, China
| | - Qingwei Guo
- Department of Thoracic Surgery, Zhoukou Central Hospital, China.
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9
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Wang S, Shen M, Wen X, Han XR, Wang YJ, Fan SH, Zhuang J, Zhang ZF, Shan Q, Li MQ, Hu B, Sun CH, Ge X, Lei QM, Wu DM, Lu J, Zheng YL. Correlation of the expressions of IGF1R-RACK1-STAT3 and Bcl-xl in nasopharyngeal carcinoma with the clinicopathological features and prognosis of nasopharyngeal carcinoma. J Cell Biochem 2017; 119:1931-1941. [PMID: 28816378 DOI: 10.1002/jcb.26354] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Accepted: 08/15/2017] [Indexed: 12/31/2022]
Abstract
The aim of this study was to investigate the correlation of expression of IGF1R-RACK1-STAT3 and Bcl-xl in nasopharyngeal carcinoma (NPC) with the clinicopathological features and the prognosis of NPC. Our study selected 215 NPC tissues and 178 chronic nasopharyngitis tissues (control group). Positive expression rates of IGF1R, RACK1, STAT3, and Bcl-xl were tested by immunohistochemical method, and expression of IGF1R, RACK1, STAT3, Bcl-xl, Bcl-2, and Bax by western blotting. Correlation of IGF1R, RACK1, STAT3, and Bcl-xl with the clinicopathological features of NPC was analyzed. The correlation among those four expression was analyzed by Spearman. The survival of NPC and independent factors of prognosis were tested by Kaplan-Meier and COX proportional hazards model respectively. The NPC group had higher positive expression rates of IGF1R, RACK1, STAT3, and Bcl-xl, and elevated expression of IGF1R, RACK1, STAT3, Bcl-xl, Bcl-2, and Bax. The lymph node metastasis (LNM) group had higher positive expression rates of IGF1R and RACK1 when compared with the non-LNM group. Patients with stage III and IV had higher positive expression rates of IGF1R, RACK1, STAT3, and Bcl-xl. There was positive correlation between expression of IGF1R and RACK1, STAT3. Such correlation was found between RACK1 and STAT3. Patients with negative expression of IGF1R, RACK1, STAT3, and Bcl-xl had higher survival rates. The risky factors of poor prognosis of NPC were positive expression of IGF1R, RACK1, STAT3 and Bcl-xl, and LNM. IGF1R-RACK1-STAT3 and Bcl-xl expression correlated with the clinicopathological features and poor prognosis of NPC.
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Affiliation(s)
- Shan Wang
- Key Laboratory for Biotechnology on Medicinal Plants of Jiangsu Province, School of Life Science, Jiangsu Normal University, Xuzhou, P.R. China
| | - Min Shen
- Key Laboratory for Biotechnology on Medicinal Plants of Jiangsu Province, School of Life Science, Jiangsu Normal University, Xuzhou, P.R. China
| | - Xin Wen
- Key Laboratory for Biotechnology on Medicinal Plants of Jiangsu Province, School of Life Science, Jiangsu Normal University, Xuzhou, P.R. China
| | - Xin-Rui Han
- Key Laboratory for Biotechnology on Medicinal Plants of Jiangsu Province, School of Life Science, Jiangsu Normal University, Xuzhou, P.R. China
| | - Yong-Jian Wang
- Key Laboratory for Biotechnology on Medicinal Plants of Jiangsu Province, School of Life Science, Jiangsu Normal University, Xuzhou, P.R. China
| | - Shao-Hua Fan
- Key Laboratory for Biotechnology on Medicinal Plants of Jiangsu Province, School of Life Science, Jiangsu Normal University, Xuzhou, P.R. China
| | - Juan Zhuang
- Key Laboratory for Biotechnology on Medicinal Plants of Jiangsu Province, School of Life Science, Jiangsu Normal University, Xuzhou, P.R. China.,School of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou, P.R. China.,Jiangsu Key Laboratory for Eco-Agricultural Biotechnology around Hongze Lake, School of Life Sciences, Huaiyin Normal University, Huaian, P.R. China
| | - Zi-Feng Zhang
- Key Laboratory for Biotechnology on Medicinal Plants of Jiangsu Province, School of Life Science, Jiangsu Normal University, Xuzhou, P.R. China
| | - Qun Shan
- Key Laboratory for Biotechnology on Medicinal Plants of Jiangsu Province, School of Life Science, Jiangsu Normal University, Xuzhou, P.R. China
| | - Meng-Qiu Li
- Key Laboratory for Biotechnology on Medicinal Plants of Jiangsu Province, School of Life Science, Jiangsu Normal University, Xuzhou, P.R. China
| | - Bin Hu
- Key Laboratory for Biotechnology on Medicinal Plants of Jiangsu Province, School of Life Science, Jiangsu Normal University, Xuzhou, P.R. China
| | - Chun-Hui Sun
- Key Laboratory for Biotechnology on Medicinal Plants of Jiangsu Province, School of Life Science, Jiangsu Normal University, Xuzhou, P.R. China
| | - Xia Ge
- Department of Oncology, Linyi People's Hospital, Linyi, P.R. China
| | - Qiu-Mei Lei
- Department of Oncology, Linyi People's Hospital, Linyi, P.R. China
| | - Dong-Mei Wu
- Key Laboratory for Biotechnology on Medicinal Plants of Jiangsu Province, School of Life Science, Jiangsu Normal University, Xuzhou, P.R. China
| | - Jun Lu
- Key Laboratory for Biotechnology on Medicinal Plants of Jiangsu Province, School of Life Science, Jiangsu Normal University, Xuzhou, P.R. China
| | - Yuan-Lin Zheng
- Key Laboratory for Biotechnology on Medicinal Plants of Jiangsu Province, School of Life Science, Jiangsu Normal University, Xuzhou, P.R. China
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10
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Duff D, Long A. Roles for RACK1 in cancer cell migration and invasion. Cell Signal 2017; 35:250-255. [PMID: 28336233 DOI: 10.1016/j.cellsig.2017.03.005] [Citation(s) in RCA: 118] [Impact Index Per Article: 16.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2016] [Revised: 03/10/2017] [Accepted: 03/13/2017] [Indexed: 01/16/2023]
Abstract
Migration and invasion of cancer cells into surrounding tissue and vasculature is an important initial step in cancer metastasis. Metastasis is the leading cause of cancer related death and thus it is crucial that we improve our understanding of the mechanisms that promote this life-threatening phenomenon. Cell migration involves a complex, multistep process that leads to the actin-driven movement of cells on or through the tissues of the body. The multifunctional scaffolding protein RACK1 plays important roles in nucleating cell signalling hubs, anchoring proteins at specific subcellular locations and regulating protein activity. It is essential for cell migration and accumulating evidence now demonstrates multiple roles for RACK1 in regulating migration and invasion of tumour cells. The possibility of designing drugs that block the migratory and invasive capabilities of cancer cells represents an attractive therapeutic strategy for treating malignant disease with RACK1 being a potential target. In this review we summarize this evidence and examine the mechanisms that underlie the contribution of RACK1 to the various stages of cell migration and invasion.
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Affiliation(s)
- Deirdre Duff
- Trinity Translational Medicine Institute, Trinity College Dublin, Trinity Centre for Health Sciences, St James's Hospital, Dublin 8, Ireland
| | - Aideen Long
- Trinity Translational Medicine Institute, Trinity College Dublin, Trinity Centre for Health Sciences, St James's Hospital, Dublin 8, Ireland.
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11
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Zhang X, Liu N, Ma D, Liu L, Jiang L, Zhou Y, Zeng X, Li J, Chen Q. Receptor for activated C kinase 1 (RACK1) promotes the progression of OSCC via the AKT/mTOR pathway. Int J Oncol 2016; 49:539-48. [DOI: 10.3892/ijo.2016.3562] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2016] [Accepted: 04/04/2016] [Indexed: 11/05/2022] Open
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12
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Peng H, Gong PG, Li JB, Cai LM, Yang L, Liu YY, Yao KT, Li X. The important role of the receptor for activated C kinase 1 (RACK1) in nasopharyngeal carcinoma progression. J Transl Med 2016; 14:131. [PMID: 27170279 PMCID: PMC4864934 DOI: 10.1186/s12967-016-0885-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2016] [Accepted: 04/28/2016] [Indexed: 01/26/2023] Open
Abstract
Background The receptor for activated C kinase 1 (RACK1) is involved in various cancers, but its roles in nasopharyngeal carcinoma (NPC) have not yet been fully elucidated. Methods Initially, RACK1 expression was analyzed by immunohistochemistry in NPC and normal nasopharyngeal (NP) tissues. It was also detected by qPCR and Western blot in NPC cells. Confocal microscope and immunofluorescence were performed to detect the subcellular compartmentalization of RACK1. Subsequently, after up- or down-regulating RACK1 in NPC cells, cell proliferation and migration/invasion were tested using in vitro assays including MTT, EdU, colony formation, Transwell and Boyden assays. Furthermore, several key molecules were detected by Western blot to explore underlying mechanism. Finally, clinical samples were analyzed to confirm the relationship between RACK1 expression and clinical features. Results Receptor for activated C kinase 1 expression was much higher in NPC than NP tissues. And RACK1 was mainly located in the cytoplasm. Overexpression of RACK1 promoted NPC cell proliferation and metastasis/invasion, whereas depletion of this protein suppressed NPC cell proliferation and metastasis/invasion. Mechanistically, RACK1 deprivation obviously suppressed the activation of Akt and FAK, suggesting the PI3K/Akt/FAK pathway as one of functional mechanisms of RACK1 in NPC. Furthermore, clinical sample analysis indicated a positive correlation between in vivo expression of RACK1 with lymph node invasion and clinical stage of NPC. Conclusion Our results demonstrate that RACK1 protein plays an important role in NPC development and progression. The upregulation of RACK1 can promote the proliferation and invasion of NPC by regulating the PI3K/Akt/FAK signal pathway. Thus, this study contributes to the discovery of a potential therapeutic target for NPC. Electronic supplementary material The online version of this article (doi:10.1186/s12967-016-0885-x) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Hong Peng
- Department of Otolaryngology-Head and Neck Surgery, The Second People's Hospital of Guangdong Province, Southern Medical University, Guangzhou, 510317, China.
| | - Ping-Gui Gong
- Department of Otolaryngology-Head and Neck Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, Guangdong, China
| | - Jin-Bang Li
- Department of Pathology, The Sixth Affiliated Hospital of Guangzhou Medical University, Qingyuan, 511518, China
| | - Long-Mei Cai
- Cancer Research Institute and the Provincial Key Laboratory of Cancer Immunotherapy, Southern Medical University, Guangzhou, 510515, Guangdong, China
| | - Le Yang
- Department of Otolaryngology-Head and Neck Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, Guangdong, China
| | - Yun-Yi Liu
- Department of Otolaryngology-Head and Neck Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, Guangdong, China
| | - Kai-Tai Yao
- Cancer Research Institute and the Provincial Key Laboratory of Cancer Immunotherapy, Southern Medical University, Guangzhou, 510515, Guangdong, China
| | - Xin Li
- Cancer Research Institute and the Provincial Key Laboratory of Cancer Immunotherapy, Southern Medical University, Guangzhou, 510515, Guangdong, China.
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Womeldorff M, Gillespie D, Jensen RL. Hypoxia-inducible factor-1 and associated upstream and downstream proteins in the pathophysiology and management of glioblastoma. Neurosurg Focus 2015; 37:E8. [PMID: 25581937 DOI: 10.3171/2014.9.focus14496] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Glioblastoma multiforme (GBM) is a highly aggressive brain tumor with an exceptionally poor patient outcome despite aggressive therapy including surgery, radiation, and chemotherapy. This aggressive phenotype may be associated with intratumoral hypoxia, which probably plays a key role in GBM tumor growth, development, and angiogenesis. A key regulator of cellular response to hypoxia is the protein hypoxia-inducible factor–1 (HIF-1). An examination of upstream hypoxic and nonhypoxic regulation of HIF-1 as well as a review of the downstream HIF-1– regulated proteins may provide further insight into the role of this transcription factor in GBM pathophysiology. Recent insights into upstream regulators that intimately interact with HIF-1 could provide potential therapeutic targets for treatment of this tumor. The same is potentially true for HIF-1–mediated pathways of glycolysis-, angiogenesis-, and invasion-promoting proteins. Thus, an understanding of the relationship between HIF-1, its upstream protein regulators, and its downstream transcribed genes in GBM pathogenesis could provide future treatment options for the care of patients with these tumors.
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14
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Wang N, Liu F, Cao F, Jia Y, Wang J, Ma W, Tan B, Wang K, Song Q, Cheng Y. RACK1 predicts poor prognosis and regulates progression of esophageal squamous cell carcinoma through its epithelial-mesenchymal transition. Cancer Biol Ther 2015; 16:528-40. [PMID: 25719728 DOI: 10.1080/15384047.2015.1016687] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
BACKGROUND RACK1 is known to be involved in tumor progression, and its prognostic value on many kinds of tumors has been identified. However, there are limited studies about the functional role of RACK1 in esophageal squamous cell carcinoma (ESCC). PATIENTS AND METHODS RACK1 expression was examined in 100 ESCC tissue samples using immunohistochemistry staining. RACK1 was knocked-down in ESCC cell lines by shRNA. The effects on cell proliferation, invasion and migration were examined in ESCC cell lines and nude mouse model. Vimentin and E-cadherin were introduced to further study the association between RACK1 and EMT. RESULTS RACK1 expression was significantly associated with the tumor length (P = 0.012), diameter<3 cm (P = 0.047), T stage (P = 0.032), and lymph node metastasis (P = 0.038), respectively. Kaplan-Meier survival analysis and Cox analyses revealed RACK1 expression was an independent predictor for OS (P = 0.030) and DFS (P = 0.027) in ESCC. Down-regulation of RACK1 inhibited cell proliferation, along with invasion and migration in vitro and in vivo. A significant positive correlation between RACK1 expression and vimentin (P = 0.0190) and an inverse correlation between RACK1 expression and E-cadherin (P = 0.0047) were found. CONCLUSIONS RACK1 predicted poor prognosis in ESCC, promoted tumor progression, and was involved in EMT of ESCC.
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Key Words
- C, chemotherapy
- CRT, chemoradiotherapy
- DFS, disease-free survival
- EMT, epithelial-mesenchymal transition
- ESCC, esophageal squamous cell carcinoma
- F, female
- IHC, immunohistochemistry
- M, male
- OS, overall survival
- R, radiotherapy
- RACK1
- RACK1, Receptor for Activated C Kinase 1
- epithelial-mesenchymal transition
- esophageal squamous cell carcinoma
- prognosis
- progression
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Affiliation(s)
- Nana Wang
- a Department of Radiation Oncology; Qilu Hospital of Shandong University ; Jinan , PR China
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15
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RACK1, a versatile hub in cancer. Oncogene 2014; 34:1890-8. [PMID: 24882575 DOI: 10.1038/onc.2014.127] [Citation(s) in RCA: 123] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2014] [Revised: 04/07/2014] [Accepted: 04/10/2014] [Indexed: 01/15/2023]
Abstract
RACK1 is a highly conserved intracellular adaptor protein with significant homology to Gβ and was originally identified as the anchoring protein for activated protein kinase C. In the past 20 years, the number of binding partners and validated cellular functions for RACK1 has increased, which facilitates clarification of its involvement in different biological events. In this review, we will focus on its role in cancer, summarizing its aberrant expression, pro- or anti-oncogenic effects and the underlying mechanisms in various cancers.
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Hu F, Tao Z, Shen Z, Wang X, Hua F. Down-regulation of EphB4 phosphorylation is necessary for esophageal squamous cell carcinoma tumorigenecity. Tumour Biol 2014; 35:7225-32. [PMID: 24771266 DOI: 10.1007/s13277-014-1955-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2013] [Accepted: 04/07/2014] [Indexed: 02/05/2023] Open
Abstract
Eph/ephrin signaling system plays a very important role in the tumorigenesis and the formation of blood vessel. However, the function of EphB4 and its ligand ephrin B2 in the carcinogenesis of esophageal squamous cell carcinoma (ESCC) is not fully understood. Here, it was found that the expression of EphB4 was up-regulated in ESCC tissues compared with the paired normal tissues, while ephrin B2 was down-regulated in ESCC samples. Phosphorylation of EphB4 induced by its ligand ephrin B2-Fc inhibited the growth, migration and colony formation of ESCC cells. Moreover, over-expression of EphB4 or EphB4 kinase dead mutant (EphB4 KD) in ESCC cells promoted cell growth and migration, suggesting EphB4 promoted cell growth and migration independent of its kinase activity. Furthermore, we found that EphB4 interacted with the adaptor protein RACK1 and RACK1 decreased the phosphorylation level of EphB4. Taken together, our study revealed the important function and regulation of EphB4 in the progression of ESCC and suggested EphB4 as a novel target for the treatment of ESCC.
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Affiliation(s)
- Fengqing Hu
- Department of Cardiovascular Surgery, First Affiliated Hospital of Soochow University, 188 Shizijie, Suzhou, 215000, China
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