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Tian C, Lang T, Qiu J, Han K, Zhou L, Min D, Zhang Z, Qi D. SKP1 promotes YAP-mediated colorectal cancer stemness via suppressing RASSF1. Cancer Cell Int 2020; 20:579. [PMID: 33292299 PMCID: PMC7713163 DOI: 10.1186/s12935-020-01683-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Accepted: 11/27/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Cancer stem cells (CSCs) have been recognized as an important drug target, however, the underlying mechanisms have not been fully understood. SKP1 is a traditional drug target for cancer therapy, while, whether SKP1 promotes colorectal cancer (CRC) stem cells (CRC-SCs) and the underlying mechanisms have remained elusive. METHODS Human CRC cell lines and primary human CRC cells were used in this study. Gene manipulation was performed by lentivirus system. The mRNA and protein levels of target genes were examined by qRT-PCR and western blot. The sphere-forming and in vitro migration capacities were determined by sphere formation and transwell assay. The self-renewal was determined by limiting dilution assay. The tumorigenicity and metastasis of cancer cells were examined by xenograft model. The promoter activity was examined by luciferase reporter assay. Nuclear run-on and Chromatin immunoprecipitation-PCR (ChIP-PCR) assay were employed to examine the transcription and protein-DNA interaction. Co-immunoprecipitation assay was used to test protein-protein interaction. The relationship between gene expression and survival was analyzed by Kaplan-meier analysis. The correlation between two genes was analyzed by Spearman analysis. Data are represented as mean ± SD and the significance was determined by Student's t test. RESULTS SKP1 was upregulated in CRC-SCs and predicted poor prognosis of colon cancer patients. Overexpression of SKP1 promoted the stemness of CRC cells reflected by increased sphere-forming, migration and self-renewal capacities as well as the expression of CSCs markers. In contrast, SKP1 depletion produced the opposite effects. SKP1 strengthened YAP activity and knockdown of YAP abolished the effect of SKP1 on the stemness of CRC cells. SKP1 suppressed RASSF1 at both mRNA and protein level. Overexpression of RASSF1 abolished the effect of SKP1 on YAP activity and CRC stemness. CONCLUSION Our results demonstrated that SKP1 suppresses RASSF1 at both mRNA and protein level, attenuates Hippo signaling, activates YAP, and thereby promoting the stemness of CRC cells.
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Affiliation(s)
- Cong Tian
- Department of Medical Oncology, Shanghai University of Medicine & Health Sciences Affiliated Sixth People's Hospital East Campus, No. 222 Huan Hu Xi San Road, Pudong New Area, Shanghai, 201306, People's Republic of China
- Department of Medical Oncology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital East Campus, No. 222 Huan Hu Xi San Road, Pudong New Area, Shanghai, 201306, People's Republic of China
| | - Tingyuan Lang
- Department of Gynecologic Oncology, Chongqing University Cancer Hospital & Chongqing Cancer Institute & Chongqing Cancer Hospital, Chongqing, 400030, Chongqing, People's Republic of China
| | - Jiangfeng Qiu
- Department of Gastrointestinal Surgery, Renji Hospital Shanghai Jiao Tong University School of Medicine, Shanghai, 200127, People's Republic of China
| | - Kun Han
- Department of Medical Oncology, Shanghai University of Medicine & Health Sciences Affiliated Sixth People's Hospital East Campus, No. 222 Huan Hu Xi San Road, Pudong New Area, Shanghai, 201306, People's Republic of China
- Department of Medical Oncology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital East Campus, No. 222 Huan Hu Xi San Road, Pudong New Area, Shanghai, 201306, People's Republic of China
| | - Lei Zhou
- Singapore Eye Research Institute, The Academia, 20 College Road, Discovery Tower Level 6, Singapore, 169856, Singapore
- Department of Ophthalmology, Yong Loo Lin School of Medicine, National University of Singapore, 1E Kent Ridge Road, NUHS, Tower Block Level 7, Singapore, 119228, Singapore
- Ophthalmology and Visual Sciences Academic Clinical Research Program, Duke-NUS Medical School, 8 College Road, Singapore, 169867, Singapore
| | - Daliu Min
- Department of Medical Oncology, Shanghai University of Medicine & Health Sciences Affiliated Sixth People's Hospital East Campus, No. 222 Huan Hu Xi San Road, Pudong New Area, Shanghai, 201306, People's Republic of China
- Department of Medical Oncology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital East Campus, No. 222 Huan Hu Xi San Road, Pudong New Area, Shanghai, 201306, People's Republic of China
| | - Zhiqi Zhang
- Department of General Surgery, Shanghai University of Medicine & Health Sciences Affiliated Sixth People's Hospital East Campus, No. 222 Huan Hu Xi San Road, Pudong New Area, Shanghai, 201306, People's Republic of China.
- Department of General Surgery, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, No. 600 Yishan Road, Xuhui District, Shanghai, 200233, People's Republic of China.
| | - Dachuan Qi
- Department of General Surgery, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, No. 600 Yishan Road, Xuhui District, Shanghai, 200233, People's Republic of China.
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Wang D, Xu X, Wu Y, Lin Y, Gao M, Hu P, Chen D, Lu X, Chen Z, Wang H, Huang C. SMIP004: A compound with antidepressant-like activities in mouse models. Eur J Pharmacol 2019; 843:260-267. [DOI: 10.1016/j.ejphar.2018.11.039] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Revised: 11/23/2018] [Accepted: 11/28/2018] [Indexed: 12/19/2022]
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Qiu D, Wang Q, Wang Z, Chen J, Yan D, Zhou Y, Li A, Zhang R, Wang S, Zhou J. RNF185 modulates JWA ubiquitination and promotes gastric cancer metastasis. Biochim Biophys Acta Mol Basis Dis 2018; 1864:1552-1561. [PMID: 29481911 DOI: 10.1016/j.bbadis.2018.02.013] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Revised: 01/24/2018] [Accepted: 02/19/2018] [Indexed: 12/12/2022]
Abstract
Gastric cancer (GC) is one of the most common malignant cancers worldwide. Metastasis leads to poor prognoses in GC patients in advanced stages. Our previous studies have demonstrated that JWA functions as a tumour suppressor and that low expression of JWA in GC tissues is significantly correlated with shorter overall survival (OS) as well as with advanced clinicopathologic features in patients. However, the mechanism of dysregulation of JWA in cancers is not clear. In the present study, we found that an E3 ubiquitin ligase, RNF185, directly interacted with JWA and promoted its ubiquitination at the K158 site, resulting in subsequent degradation. Moreover, the protein level of RNF185 was negatively correlated with JWA in tumour tissues from GC patients. High RNF185 expression was significantly correlated with shorter OS. Additionally, increased RNF185 expression facilitated GC cell migration in vitro and promoted GC metastasis in vivo by downregulating JWA expression. However, this effect was reversed by replenishment of JWA. In conclusion, our findings highlight the following: (1) RNF185 promotes GC metastasis by mediating JWA degradation via a ubiquitin-proteasome pathway; (2) the K158 site of JWA is essential for its ubiquitination in GC cells. These findings suggest that RNF185 is a novel candidate prognostic marker and potential therapeutic target for GC.
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Affiliation(s)
- Danping Qiu
- Department of Molecular Cell Biology and Toxicology, Key Laboratory of Modern Toxicology of Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 211166, People's Republic of China; Jiangsu Key Lab of Cancer Biomarkers, Prevention and Treatment, School of Public Health, Nanjing Medical University, Nanjing 211166, People's Republic of China
| | - Qiang Wang
- Department of Molecular Cell Biology and Toxicology, Key Laboratory of Modern Toxicology of Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 211166, People's Republic of China; Jiangsu Key Lab of Cancer Biomarkers, Prevention and Treatment, School of Public Health, Nanjing Medical University, Nanjing 211166, People's Republic of China
| | - Zhangding Wang
- Department of Molecular Cell Biology and Toxicology, Key Laboratory of Modern Toxicology of Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 211166, People's Republic of China; Jiangsu Key Lab of Cancer Biomarkers, Prevention and Treatment, School of Public Health, Nanjing Medical University, Nanjing 211166, People's Republic of China
| | - Junjie Chen
- Department of Molecular Cell Biology and Toxicology, Key Laboratory of Modern Toxicology of Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 211166, People's Republic of China; Jiangsu Key Lab of Cancer Biomarkers, Prevention and Treatment, School of Public Health, Nanjing Medical University, Nanjing 211166, People's Republic of China
| | - Donglin Yan
- Department of Molecular Cell Biology and Toxicology, Key Laboratory of Modern Toxicology of Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 211166, People's Republic of China; Jiangsu Key Lab of Cancer Biomarkers, Prevention and Treatment, School of Public Health, Nanjing Medical University, Nanjing 211166, People's Republic of China
| | - Yan Zhou
- Department of Oncology, Yixing People's Hospital, Yixing, People's Republic of China
| | - Aiping Li
- Department of Molecular Cell Biology and Toxicology, Key Laboratory of Modern Toxicology of Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 211166, People's Republic of China; Jiangsu Key Lab of Cancer Biomarkers, Prevention and Treatment, School of Public Health, Nanjing Medical University, Nanjing 211166, People's Republic of China
| | - Ruiwen Zhang
- Department of Pharmaceutical Sciences, School of Pharmacy, Texas Tech University Health Sciences Center, Amarillo, TX 79106, USA
| | - Shouyu Wang
- Department of Molecular Cell Biology and Toxicology, Key Laboratory of Modern Toxicology of Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 211166, People's Republic of China; Jiangsu Key Lab of Cancer Biomarkers, Prevention and Treatment, School of Public Health, Nanjing Medical University, Nanjing 211166, People's Republic of China.
| | - Jianwei Zhou
- Department of Molecular Cell Biology and Toxicology, Key Laboratory of Modern Toxicology of Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 211166, People's Republic of China; Jiangsu Key Lab of Cancer Biomarkers, Prevention and Treatment, School of Public Health, Nanjing Medical University, Nanjing 211166, People's Republic of China.
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Duan X, Bai J, Wei J, Li Z, Liu X, Xu G. MicroRNA-508-5p suppresses metastasis in human gastric cancer by targeting S-phase kinase‑associated protein 2. Mol Med Rep 2017. [PMID: 28627698 DOI: 10.3892/mmr.2017.6793] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
S-phase kinase-associated protein 2 (SKP2), a potent oncogene was revealed to be upregulated in gastric cancer (GC) tissue samples, in which SKP2 was inversely correlated with microRNA (miR)‑508‑5p transcripts. In present study, the functional effect of miR‑508‑5p on SKP2 and its metastatic potential were investigated in SGC‑7901 GC cells. Significant downregulation of the miR‑508‑5p transcript was associated with the progression of GC. Furthermore, the overexpression of miR‑508‑5p was demonstrated to inhibit the proliferation, migration and invasion of SGC‑7901 cells, as well as induced cell apoptosis and cell cycle arrest at the G0/G1 phase in vitro. The overexpression of miR‑508‑5p was able to downregulate the expression of the SKP2 oncogene, through a mechanism by which miR‑508‑5p directly targeted the SKP2 gene. Thus, regulating transcriptional and post‑transcriptional SKP2 expression, as demonstrated using luciferase reporter assays, reverse transcription‑quantitative polymerase chain reaction analysis and immunoblotting assays. The results of the present study identified that miR‑508‑5p functionally affects the SKP2 gene and reduces metastatic potential in GC, suggesting a novel role of miR‑508‑5p in the regulation of SKP2 and cell cycle.
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Affiliation(s)
- Xiangguo Duan
- Ningxia Key Laboratory of Clinical and Pathogenic Microbiology, General Hospital of Ningxia Medical University, Yinchuan, Ningxia 750004, P.R. China
| | - Jing Bai
- Department of Laboratory Medicine, General Hospital of Ningxia Medical University, Yinchuan, Ningxia 750004, P.R. China
| | - Jun Wei
- Ningxia Key Laboratory of Clinical and Pathogenic Microbiology, General Hospital of Ningxia Medical University, Yinchuan, Ningxia 750004, P.R. China
| | - Zhenhao Li
- Department of Medical Laboratory, School of Clinical Medicine, Ningxia Medical University, Yinchuan, Ningxia 750004, P.R. China
| | - Xinlan Liu
- Department of Medical Laboratory, School of Clinical Medicine, Ningxia Medical University, Yinchuan, Ningxia 750004, P.R. China
| | - Guangxian Xu
- Ningxia Key Laboratory of Clinical and Pathogenic Microbiology, General Hospital of Ningxia Medical University, Yinchuan, Ningxia 750004, P.R. China
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Wen Y, Wang K, Yang K. Inhibiting the role of Skp2 suppresses cell proliferation and tumorigenesis of human gastric cancer cells via the upregulation of p27kip1. Mol Med Rep 2016; 14:3917-24. [PMID: 27572672 DOI: 10.3892/mmr.2016.5676] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2015] [Accepted: 05/31/2016] [Indexed: 11/06/2022] Open
Abstract
Gastric cancer is a malignant disease of the digestive system with high rates of incidence and mortality. S‑phase kinase‑associated protein 2 (Skp2) is a novel oncogene, which has been identified to be important in tumor progression and metastasis. In order to clarify the role of Skp2 in human gastric cancer, the present study detected the expression of Skp2 in human gastric cancer tissues, and investigated the molecular mechanism of Skp2 in the progression of gastric carcinoma. The results of the initial bioinformatics analysis showed that Skp2 was significantly upregulated in 31 specimens of primary gastric cancer from a UK patient cohort, and in 10 gastric cancer lines of a side population, compared with normal gastric tissues (P<0.01). Specimens from 47 patients with gastric cancer and 19 normal gastric tissue specimens were obtained and analyzed using western blot analysis. The positive rate of expression of Skp2 was 87.2%, indicating that the expression of Skp2 was observed in 41 specimens of the detected gastric cancer samples, whereas the positive rate of the expression of Skp2 was 5.6% in the normal gastric samples (P<0.01). In the human gastric cancer cell lines, the defective regulation of Skp2 or presence of an Skp2 inhibitor inhibited the proliferation of BGC‑823 and MKN‑45 cells. In addition, the Skp2 inhibitor suppressed the proliferation of gastric cancer cells in a time‑ and dose‑dependent manner. Furthermore, transfection with Skp2 short hairpin (sh)RNA or treatment with SKP inhibitor C1 for 48 and 72 h led to the accumulation of p27kip1 in Hela cells. Tumorigenicity experiments involving nude mice showed that interference of the expression of Skp2 inhibited the growth of the human gastric tumor cells in the nude mice, and the tumor weights and volumes in the Skp2 shRNA group were significantly lower, compared with those in the negative control shRNA group (P<0.01) and untreated group (P<0.01). Taken together, these data suggested that Skp2 acted as an oncogene in human gastric cancer, and that Skp2‑mediated p27kip1 degradation contributed to the progression of gastric cancer. Abrogating the effects of Skp2 may effectively inhibit the growth of gastric cancer cells, which may be useful as a novel target in the clinical treatment of gastric cancer.
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Affiliation(s)
- Yanguang Wen
- Department of The Second General Surgery, Third Xiangya Hospital, Xiangya School of Medicine, Central South University, Changsha, Hunan 410013, P.R. China
| | - Kuansong Wang
- Department of Pathology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, P.R. China
| | - Kaiyan Yang
- Department of The Second General Surgery, Third Xiangya Hospital, Xiangya School of Medicine, Central South University, Changsha, Hunan 410013, P.R. China
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Hussain M, Lu Y, Liu YQ, Su K, Zhang J, Liu J, Zhou GB. Skp1: Implications in cancer and SCF-oriented anti-cancer drug discovery. Pharmacol Res 2016; 111:34-42. [PMID: 27238229 DOI: 10.1016/j.phrs.2016.05.027] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/05/2016] [Revised: 04/28/2016] [Accepted: 05/25/2016] [Indexed: 12/29/2022]
Abstract
In the last decade, the ubiquitin proteasome system (UPS), in general, and E3 ubiquitin ligases, in particular, have emerged as valid drug targets for the development of novel anti-cancer therapeutics. Cullin RING Ligases (CRLs), which can be classified into eight groups (CRL1-8) and comprise approximately 200 members, represent the largest family of E3 ubiquitin ligases which facilitate the ubiquitination-derived proteasomal degradation of a myriad of functionally and structurally diverse substrates. S phase kinase-associated protein 1 (Skp1)-Cullin1-F-Box protein (SCF) complexes are the best characterized among CRLs, which play crucial roles in numerous cellular processes and physiological dysfunctions, such as in cancer biology. Currently, there is growing interest in developing SCF-targeting anti-cancer therapies for clinical application. Indeed, the research in this field has seen some progress in the form of cullin neddylation- and Skp2-inhibitors. However, it still remains an underdeveloped area and needs to design new strategies for developing improved form of therapy. In this review, we venture a novel strategy that rational pharmacological targeting of Skp1, a central regulator of SCF complexes, may provide a novel avenue for SCF-oriented anti-cancer therapy, expected: (i) to simultaneously address the critical roles that multiple SCF oncogenic complexes play in cancer biology, (ii) to selectively target cancer cells with minimal normal cell toxicity, and (iii) to offer multiple chemical series, via therapeutic interventions at the Skp1 binding interfaces in SCF complex, thereby maximizing chances of success for drug discovery. In addition, we also discuss the challenges that might be posed regarding rational pharmacological interventions against Skp1.
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Affiliation(s)
- Muzammal Hussain
- State Key Laboratory of Respiratory Disease, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 190 Kaiyuan Avenue, Science Park, Guangzhou, 510530, PR China; University of Chinese Academy of Sciences, Beijing, 100049, PR China
| | - Yongzhi Lu
- State Key Laboratory of Respiratory Disease, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 190 Kaiyuan Avenue, Science Park, Guangzhou, 510530, PR China
| | - Yong-Qiang Liu
- State Key Laboratory of Membrane Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, PR China
| | - Kai Su
- State Key Laboratory of Respiratory Disease, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 190 Kaiyuan Avenue, Science Park, Guangzhou, 510530, PR China; School of Life Sciences, University of Science and Technology of China, Hefei, 230000, PR China
| | - Jiancun Zhang
- State Key Laboratory of Respiratory Disease, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 190 Kaiyuan Avenue, Science Park, Guangzhou, 510530, PR China; State Key Laboratory of Respiratory Disease, Guangzhou Medical University, Guangzhou, PR China
| | - Jinsong Liu
- State Key Laboratory of Respiratory Disease, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 190 Kaiyuan Avenue, Science Park, Guangzhou, 510530, PR China.
| | - Guang-Biao Zhou
- State Key Laboratory of Membrane Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, PR China.
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GONG JIAN, CAO JUAN, LIU GUINAN, HUO JIRONG. Function and mechanism of F-box proteins in gastric cancer (Review). Int J Oncol 2015; 47:43-50. [DOI: 10.3892/ijo.2015.2983] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2015] [Accepted: 04/24/2015] [Indexed: 11/06/2022] Open
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