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Zhang X, Geng L, Tang Y, Wang Y, Zhang Y, Zhu C, Lei H, Xu H, Zhu Q, Wu Y, Gu W. Ubiquitin-specific protease 14 targets PFKL-mediated glycolysis to promote the proliferation and migration of oral squamous cell carcinoma. J Transl Med 2024; 22:193. [PMID: 38388430 PMCID: PMC10885370 DOI: 10.1186/s12967-024-04943-z] [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: 05/30/2023] [Accepted: 01/31/2024] [Indexed: 02/24/2024] Open
Abstract
Aberrant upregulation of the ubiquitin-specific protease 14 (USP14) has been found in some malignant tumors, including oral squamous cell carcinoma (OSCC). In this study, we further demonstrated that aberrantly overexpressed USP14 was also closely related to adverse clinicopathological features and poor prognosis in patients with OSCC, so we hypothesized that USP14 might act as a tumor-promoting factor during the progression of OSCC. Notably, we originally proved that USP14 is a deubiquitinating enzyme for phosphofructokinase-1 liver type (PFKL), a key rate-limiting enzyme involved in the glycolytic pathway. USP14 interacts with PFKL and enhances its stability through deubiquitination in OSCC cells, which in turn enhances PFKL-mediated glycolytic metabolism and ultimately promote cellular proliferation, migration, and tumorigenesis. In this work, we have also demonstrated for the first time that USP14 is a critical regulator of glycolysis in OSCC and verified a novel mechanism whereby it is involved in tumor metastasis and growth. Collectively, our findings provide novel insights into the tumor-promoting role of USP14 and establish mechanistic foundations for USP14-targeting therapies.
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Affiliation(s)
- Xingming Zhang
- Department of Clinical Laboratory, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China
| | - Lou Geng
- Department of Clinical Laboratory, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China
| | - Yi Tang
- Department of Clinical Laboratory, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China
| | - Yingying Wang
- Hongqiao International Institute of Medicine, Shanghai Tongren Hospital/Faculty of Basic Medicine, Key Laboratory of Cell Differentiation and Apoptosis of the Chinese Ministry of Education, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Youping Zhang
- Hongqiao International Institute of Medicine, Shanghai Tongren Hospital/Faculty of Basic Medicine, Key Laboratory of Cell Differentiation and Apoptosis of the Chinese Ministry of Education, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Chujiao Zhu
- Hongqiao International Institute of Medicine, Shanghai Tongren Hospital/Faculty of Basic Medicine, Key Laboratory of Cell Differentiation and Apoptosis of the Chinese Ministry of Education, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Hu Lei
- Hongqiao International Institute of Medicine, Shanghai Tongren Hospital/Faculty of Basic Medicine, Key Laboratory of Cell Differentiation and Apoptosis of the Chinese Ministry of Education, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Hanzhang Xu
- Hongqiao International Institute of Medicine, Shanghai Tongren Hospital/Faculty of Basic Medicine, Key Laboratory of Cell Differentiation and Apoptosis of the Chinese Ministry of Education, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Qi Zhu
- Department of Hematology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Yingli Wu
- Hongqiao International Institute of Medicine, Shanghai Tongren Hospital/Faculty of Basic Medicine, Key Laboratory of Cell Differentiation and Apoptosis of the Chinese Ministry of Education, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China.
- Research Units of Stress and Tumor (2019RU043), Chinese Academy of Medical Sciences, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200025, China.
| | - Wenli Gu
- Department of Clinical Laboratory, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China.
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Du XH, Ke SB, Liang XY, Gao J, Xie XX, Qi LZ, Liu XY, Xu GY, Zhang XD, Du RL, Li SZ. USP14 promotes colorectal cancer progression by targeting JNK for stabilization. Cell Death Dis 2023; 14:56. [PMID: 36693850 PMCID: PMC9873792 DOI: 10.1038/s41419-023-05579-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2022] [Revised: 12/22/2022] [Accepted: 01/10/2023] [Indexed: 01/26/2023]
Abstract
MAPK/JNK signaling is pivotal in carcinogenesis. However, ubiquitin-mediated homeostasis of JNK remains to be verified. Here, with results from RNA sequencing (RNA-seq) and luciferase reporter pathway identification, we show that USP14 orchestrates MAPK/JNK signaling and identify USP14 as a deubiquitinase that interacts and stabilizes JNK. USP14 is elevated in colorectal cancer patients and is positively associated with JNK protein and downstream gene expression. USP14 ablation reduces cancer cell proliferation in vitro and colorectal tumorigenesis in vivo by downregulating MAPK/JNK pathway activation. Moreover, USP14 expression is induced by TNF-α, forming a feedback loop with JNK and leading to tumor amplification. Our study suggests that elevated expression of USP14 promotes MAPK/JNK signaling by stabilizing JNK, which in turn augments colorectal carcinogenesis, indicating a potential therapeutic target for colorectal cancer patients with increased USP14 expression.
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Affiliation(s)
- Xue-Hua Du
- School of Medicine, Chongqing University, Chongqing, 400030, China
- Hubei Key Laboratory of Cell Homeostasis, College of Life Sciences, Wuhan University, Wuhan, Hubei, 430072, China
| | - Shao-Bo Ke
- Cancer Center, Renmin Hospital of Wuhan University, Wuhan, 430060, China
| | - Xin-Yi Liang
- Hubei Key Laboratory of Cell Homeostasis, College of Life Sciences, Wuhan University, Wuhan, Hubei, 430072, China
| | - Jie Gao
- Hubei Key Laboratory of Cell Homeostasis, College of Life Sciences, Wuhan University, Wuhan, Hubei, 430072, China
| | - Xiao-Xiao Xie
- School of Medicine, Chongqing University, Chongqing, 400030, China
| | - Lin-Zhi Qi
- School of Medicine, Chongqing University, Chongqing, 400030, China
| | - Xue-Yi Liu
- Hubei Key Laboratory of Cell Homeostasis, College of Life Sciences, Wuhan University, Wuhan, Hubei, 430072, China
| | - Guo-Yuan Xu
- Hubei Key Laboratory of Cell Homeostasis, College of Life Sciences, Wuhan University, Wuhan, Hubei, 430072, China
| | - Xiao-Dong Zhang
- Hubei Key Laboratory of Cell Homeostasis, College of Life Sciences, Wuhan University, Wuhan, Hubei, 430072, China
| | - Run-Lei Du
- Hubei Key Laboratory of Cell Homeostasis, College of Life Sciences, Wuhan University, Wuhan, Hubei, 430072, China.
| | - Shang-Ze Li
- School of Medicine, Chongqing University, Chongqing, 400030, China.
- Hubei Key Laboratory of Cell Homeostasis, College of Life Sciences, Wuhan University, Wuhan, Hubei, 430072, China.
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Jin S, Kudo Y, Horiguchi T. The Role of Deubiquitinating Enzyme in Head and Neck Squamous Cell Carcinoma. Int J Mol Sci 2022; 24:ijms24010552. [PMID: 36613989 PMCID: PMC9820089 DOI: 10.3390/ijms24010552] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 12/20/2022] [Accepted: 12/24/2022] [Indexed: 12/30/2022] Open
Abstract
Ubiquitination and deubiquitination are two popular ways for the post-translational modification of proteins. These two modifications affect intracellular localization, stability, and function of target proteins. The process of deubiquitination is involved in histone modification, cell cycle regulation, cell differentiation, apoptosis, endocytosis, autophagy, and DNA repair after damage. Moreover, it is involved in the processes of carcinogenesis and cancer development. In this review, we discuss these issues in understanding deubiquitinating enzyme (DUB) function in head and neck squamous cell carcinoma (HNSCC), and their potential therapeutic strategies for HNSCC patients are also discussed.
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Chow PM, Dong JR, Chang YW, Kuo KL, Lin WC, Liu SH, Huang KH. The UCHL5 Inhibitor b-AP15 Overcomes Cisplatin Resistance via Suppression of Cancer Stemness in Urothelial Carcinoma. MOLECULAR THERAPY - ONCOLYTICS 2022; 26:387-398. [PMID: 36090476 PMCID: PMC9421311 DOI: 10.1016/j.omto.2022.08.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Accepted: 08/02/2022] [Indexed: 11/20/2022]
Abstract
Urothelial carcinoma (UC) comprises the majority of bladder cancers. Standard platinum-based chemotherapy has a response rate of approximately 50%, but drug resistance develops after short-term treatment. Deubiquitinating (DUB) enzyme inhibitors increase protein polyubiquitination and endoplasmic reticulum (ER) stress, which might further suppress cancer stemness and overcome cisplatin resistance. Therefore, we investigated the cytotoxic effect and potential mechanisms of b-AP15 on urothelial carcinoma. Our results revealed that b-AP15 induced ER stress and apoptosis in BFTC905, T24, T24/R (cisplatin-resistant), and RT4 urothelial carcinoma cell lines. Inhibition of the MYC signaling pathway and cancer stemness by b-AP15 was confirmed by RNA sequencing, RT-PCR, immunoblotting, and sphere-forming assays. In the mouse xenograft model, the combination of b-AP15 and cisplatin showed superior therapeutic effects compared with either monotherapy.
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Affiliation(s)
- Po-Ming Chow
- Department of Urology, National Taiwan University Hospital, Taipei 100, Taiwan
- Department of Urology, College of Medicine, National Taiwan University, Taipei 100, Taiwan
| | - Jun-Ren Dong
- Department of Urology, National Taiwan University Hospital, Taipei 100, Taiwan
- Department of Urology, College of Medicine, National Taiwan University, Taipei 100, Taiwan
| | - Yu-Wei Chang
- Department of Urology, National Taiwan University Hospital, Taipei 100, Taiwan
- Department of Urology, College of Medicine, National Taiwan University, Taipei 100, Taiwan
- Department of Biomedical Sciences, Cornell University, Ithaca, NY 14853, USA
| | - Kuan-Lin Kuo
- Department of Urology, National Taiwan University Hospital, Taipei 100, Taiwan
- Department of Urology, College of Medicine, National Taiwan University, Taipei 100, Taiwan
- Graduate Institute of Toxicology, College of Medicine, National Taiwan University, Taipei 100, Taiwan
| | - Wei-Chou Lin
- Department of Pathology, National Taiwan University Hospital, Taipei 100, Taiwan
| | - Shing-Hwa Liu
- Graduate Institute of Toxicology, College of Medicine, National Taiwan University, Taipei 100, Taiwan
- Department of Medical Research, China Medical University Hospital, China Medical University, Taichung 404, Taiwan
- Department of Pediatrics, National Taiwan University Hospital, Taipei 100, Taiwan
| | - Kuo-How Huang
- Department of Urology, National Taiwan University Hospital, Taipei 100, Taiwan
- Department of Urology, College of Medicine, National Taiwan University, Taipei 100, Taiwan
- Corresponding author Kuo-How Huang, MD, PhD, Department of Urology, National Taiwan University Hospital and College of Medicine, National Taiwan University, No. 7, Zhongshan S. Rd., Zhongzheng Dist., Taipei 100, Taiwan.
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Lei J, Liu X, Liu W, Zhang Y, Liu Z. The prognostic value of USP14 and PSMD14 expression in non-small cell lung cancer. ANNALS OF TRANSLATIONAL MEDICINE 2021; 9:1019. [PMID: 34277819 PMCID: PMC8267284 DOI: 10.21037/atm-21-2748] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Accepted: 06/16/2021] [Indexed: 01/03/2023]
Abstract
Background Ubiquitin specific peptidase 14 (USP14) and proteasome 26S subunit, non-ATPase 14 (PSMD14) are two deubiquitinases that are closely related to the human 19S proteasome. These are highly expressed in various types of cancers and are associated with prognosis. However, the expression, clinicopathological features, and prognostic relevance of these two deubiquitinases remain unclear in patients with non-small cell lung cancer (NSCLC). Moreover, the correlation between the expression of these two deubiquitinases in NSCLC has not been reported. Methods In this study, the expression of USP14 and PSMD14 in NSCLC tissues and adjacent non-tumor tissues were examined by immunohistochemical staining. The association of these two deubiquitinases with the clinicopathological features and overall survival (OS) of patients with NSCLC was evaluated meanwhile. Results The expression of USP14 and PSMD14 was upregulated in NSCLC tissues compared with adjacent non-tumor tissues. High expression of both these deubiquitinases was positively correlated with the TNM stage of NSCLC. In addition, PSMD14 was positively correlated with lymph node metastasis in NSCLC. The survival analysis showed that elevated levels of USP14 or PSMD14 were associated with poorer survival of NSCLC patients compared with low expression of USP14 or PSMD14. Cox regression analysis indicated that TNM stage, USP14, and PSMD14 were independent prognostic factors for OS in NSCLC. Conclusions This study demonstrated that USP14 and PSMD14 may play important roles in the progression of NSCLC, especially when they are expressed simultaneously at elevated levels. Thus, USP14 and PSMD14 may be potential novel biomarkers and therapeutic targets for the prognosis and treatment of patients with NSCLC.
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Affiliation(s)
- Jian Lei
- Affiliated Cancer Hospital and Institute of Guangzhou Medical University, Guangzhou Municipal and Guangdong Provincial Key Laboratory of Protein Modification and Degradation, State Key Laboratory of Respiratory Disease, School of Basic Medical Sciences, Guangzhou Medical University, Guangzhou, China.,Department of Pathology, Hunan Cancer Hospital and The Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, Changsha, China
| | - Xiaoliu Liu
- Department of Hematology and Oncology, The Fourth Hospital of Changsha and The Affiliated Changsha hospital of Hunan Normal University, Changsha, China
| | - Wei Liu
- Department of Pathology, Hunan Cancer Hospital and The Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, Changsha, China
| | - Yun Zhang
- Department of Pathology, Hunan Cancer Hospital and The Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, Changsha, China
| | - Zhihong Liu
- Department of Pathology, Hunan Cancer Hospital and The Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, Changsha, China
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Ubiquitination and Deubiquitination in Oral Disease. Int J Mol Sci 2021; 22:ijms22115488. [PMID: 34070986 PMCID: PMC8197098 DOI: 10.3390/ijms22115488] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Revised: 05/15/2021] [Accepted: 05/18/2021] [Indexed: 01/07/2023] Open
Abstract
Oral health is an integral part of the general health and well-being of individuals. The presence of oral disease is potentially indicative of a number of systemic diseases and may contribute to their early diagnosis and treatment. The ubiquitin (Ub) system has been shown to play a role in cellular immune response, cellular development, and programmed cell death. Ubiquitination is a post-translational modification that occurs in eukaryotes. Its mechanism involves a number of factors, including Ub-activating enzymes, Ub-conjugating enzymes, and Ub protein ligases. Deubiquitinating enzymes, which are proteases that reversely modify proteins by removing Ub or Ub-like molecules or remodeling Ub chains on target proteins, have recently been regarded as crucial regulators of ubiquitination-mediated degradation and are known to significantly affect cellular pathways, a number of biological processes, DNA damage response, and DNA repair pathways. Research has increasingly shown evidence of the relationship between ubiquitination, deubiquitination, and oral disease. This review investigates recent progress in discoveries in diseased oral sites and discusses the roles of ubiquitination and deubiquitination in oral disease.
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Xie W, Xu L. Ubiquitin-specific protease 14 promotes radio-resistance and suppresses autophagy in oral squamous cell carcinoma. Exp Cell Res 2020; 398:112385. [PMID: 33212146 DOI: 10.1016/j.yexcr.2020.112385] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Revised: 11/12/2020] [Accepted: 11/15/2020] [Indexed: 11/29/2022]
Abstract
Oral squamous cell carcinoma (OSCC) is a common malignant tumor in the world. Radiotherapy is one of the standard therapies for patients with OSCC, but its clinical efficiency is limited due to radioresistance. In this study, we identified a mechanism of such resistance regulated by Ubiquitin-specific protease 14 (USP14). USP14 expression was significantly increased in clinical OSCC tissue samples and cell lines, and OSCC patients with high USP14 expression predicted poor overall survival rate. Additionally, a negative correlation between USP14 and LC3B was observed in patients with OSCC. We then found that irradiation (IR)-reduced cell survival of OSCC cells lines was further decreased when USP14 was knocked down. However, USP14 over-expression significantly promoted the cell viability of OSCC cells after IR treatment. Colony formation analysis confirmed thatafter IR treatment,USP14 knockdown markedly decreased the proliferation of OSCC cells, but over-expressing USP14 significantly up-regulated the proliferative activity of OSCC cells. Furthermore, DNA damage caused by IR was enhanced by USP14 knockdown, while been suppressed in OSCC cells with USP14 over-expression. Additionally, IR-inducedapoptosis was further promoted by USP14 knockdown in OSCC cells, which was, however, significantly abolished by USP14 over-expression.Moreover, our in vivo studies showed that IR-reduced tumor growth and tumor weight were further enhanced by USP14 knockdown in OSCC tumor-bearing nude mice. Finally, we found that USP14 knockdown could promote IR-induced autophagy by increasing LC3BII and γH2AX expression levels in IR-treated OSCC cells. However, this event was markedly abolished by ATG5 knockdown, subsequently restoring the cell proliferation in IR-incubated OSCC cells.Finally, we found that USP14-mediated apoptosis was autophagy-dependent in IR-treated OSCC cells. Taken together, these findings suggested that suppressing USP14 could alleviateradioresistancein OSCC both in vitro and in vivo by inducing apoptosis and autophagy, and thus could be served as a promising therapeutic strategy for OSCC treatment.
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Affiliation(s)
- Weihong Xie
- Department of Oral and Maxillofacial Surgery, the First Affiliated Hospital, Zhengzhou University, Zhengzhou, 450052, China.
| | - Lijuan Xu
- Clinical Laboratory, the First Affiliated Hospital, Zhengzhou University, Zhengzhou, 450052, China
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Luo F, Zhou Z, Cai J, Du W. DUB3 Facilitates Growth and Inhibits Apoptosis Through Enhancing Expression of EZH2 in Oral Squamous Cell Carcinoma. Onco Targets Ther 2020; 13:1447-1460. [PMID: 32110043 PMCID: PMC7035907 DOI: 10.2147/ott.s230577] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Accepted: 01/15/2020] [Indexed: 12/23/2022] Open
Abstract
Background Here, we probed the action mechanism of ubiquitin-specific processing proteases 17 (DUB3) in the evolution of oral squamous cell carcinoma (OSCC). Methods The expression of genes were calculated by qRT-PCR, and proteins were assessed by Western blot and immunohistochemistry. The cells viability and proliferation were checked by MTT and EdU assay, respectively. Flow cytometry was implemented to detect the cell cycle and apoptosis. The activity of EZH2 gene promoter was measured by luciferase reporter assay. Co-immunoprecipitation assay was used to ensure the ubiquitination of bromodomain-containing protein 4 (BRD4). The cell apoptosis of tumor tissues was assessed by TUNEL assay. Results DUB3 was overexpressed in OSCC tissues and cell lines, and negatively correlated with patient’s survival time. DUB3 downregulation could effectively curb OSCC cells viability and proliferation, promote cell apoptosis and the expression of cleaved-caspase-3, cleaved PARP and p21, while inhibit cyclin D1. Besides, DUB3 production was positivity correlated with enhancer of zeste homolog-2 (EZH2) and BRD4. BRD4 downregulation could repress DUB3-induced EZH2 production, and MG132 reversed DUB3 decreasing-mediated BRD4 downregulation. Downregulation of DUB3 promoted BRD4 ubiquitination. DUB3 promoted OSCC cells proliferation, while suppressing apoptosis via facilitating EZH2 production. At last, in vivo experiment indicated that the downregulation of DUB3 significantly inhibited the growth of xenograft tumor. Conclusion In summary, we found that DUB3 enhanced OSCC cells proliferation and xenograft tumor growth, while inhibited their apoptosis via promoting BRD4-mediated upregulation of EZH2. Our study indicated that DUB3 may be an effective anti-cancer target for OSCC therapy.
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Affiliation(s)
- Fei Luo
- Department of Oncology, First People's Hospital of Jinzhou, Jinzhou 434000, People's Republic of China
| | - Zunyan Zhou
- Department of Oncology, First People's Hospital of Jinzhou, Jinzhou 434000, People's Republic of China
| | - Jun Cai
- Department of Oncology, First People's Hospital of Jinzhou, Jinzhou 434000, People's Republic of China
| | - Wei Du
- Department of Oncology, First People's Hospital of Jinzhou, Jinzhou 434000, People's Republic of China
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9
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Functional analysis of deubiquitylating enzymes in tumorigenesis and development. Biochim Biophys Acta Rev Cancer 2019; 1872:188312. [DOI: 10.1016/j.bbcan.2019.188312] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Revised: 08/16/2019] [Accepted: 08/16/2019] [Indexed: 02/06/2023]
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10
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Deubiquitylatinase inhibitor b-AP15 induces c-Myc-Noxa-mediated apoptosis in esophageal squamous cell carcinoma. Apoptosis 2019; 24:826-836. [DOI: 10.1007/s10495-019-01561-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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11
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Zhou L, Jiang H, Du J, Li L, Li R, Lu J, Fu W, Hou J. USP15 inhibits multiple myeloma cell apoptosis through activating a feedback loop with the transcription factor NF-κBp65. Exp Mol Med 2018; 50:1-12. [PMID: 30459344 PMCID: PMC6244212 DOI: 10.1038/s12276-018-0180-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Revised: 08/21/2018] [Accepted: 09/04/2018] [Indexed: 12/14/2022] Open
Abstract
USP15 has been shown to stabilize transcription factors, to be amplified in many cancers and to mediate cancer cell survival. However, the underlying mechanism by which USP15 regulates multiple myeloma (MM) cell proliferation and apoptosis has not been established. Here, our results showed that USP15 mRNA expression was upregulated in MM patients. USP15 silencing induced MM cell proliferation inhibition, apoptosis, and the expression of nuclear and cytoplasmic NF-κBp65, while USP15 overexpression exhibited an inverse effect. Moreover, in vivo experiments indicated that USP15 silencing inhibited MM tumor growth and NF-κBp65 expression. PDTC treatment significantly inhibited USP15 overexpression-induced cell proliferation, apoptosis inhibition, and NF-κBp65 expression. USP15 overexpression promoted NF-κBp65 expression through inhibition of its ubiquitination, whereas NF-κBp65 promoted USP15 expression as a positive regulator. Taken together, the USP15-NF-κBp65 loop is involved in MM tumorigenesis and may be a potential therapeutic target for MM. Researchers may have found a new target for treatment of multiple myeloma (MM), a common type of blood cancer. MM develops in plasma cells, white blood cells that fight infection, and is very difficult to treat. Ubiquitins, small regulatory proteins which tag proteins for destruction, have been implicated in development of many cancers. Jian Hou at Ren Ji Hospital and Weijun Fu at Changzheng Hospital, both in Shanghai, China, investigated how one ubiquitin, USP15, is involved in MM. Patients with MM showed higher levels of USP15, and MM cells supplied with additional USP15 multiplied more rapidly. Treating MM mice with USP15 inhibitors slowed tumor growth. Further investigation showed that USP15 interacts with another molecule known to be involved in development of many cancers. These results may help to develop alternative treatments for multiple myeloma.
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Affiliation(s)
- Lili Zhou
- Shanghai Jiahui International Hospital Cancer Center, Shanghai, 200233, China.,Department of Hematology, Shanghai Changzheng Hospital, Second Military Medical University, Shanghai, 200433, China
| | - Hua Jiang
- Department of Hematology, Shanghai Changzheng Hospital, Second Military Medical University, Shanghai, 200433, China
| | - Juan Du
- Department of Hematology, Shanghai Changzheng Hospital, Second Military Medical University, Shanghai, 200433, China
| | - Lu Li
- Department of Hematology, Shanghai Changzheng Hospital, Second Military Medical University, Shanghai, 200433, China
| | - Rong Li
- Department of Hematology, Shanghai Changzheng Hospital, Second Military Medical University, Shanghai, 200433, China
| | - Jing Lu
- Department of Hematology, Shanghai Changzheng Hospital, Second Military Medical University, Shanghai, 200433, China
| | - Weijun Fu
- Department of Hematology, Shanghai Changzheng Hospital, Second Military Medical University, Shanghai, 200433, China.
| | - Jian Hou
- Department of Hematology, Renji Hospital affiliated to Shanghai Jiaotong University School of Medicine, Shanghai, 200127, China.
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12
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Wang Y, Jiang Y, Ding S, Li J, Song N, Ren Y, Hong D, Wu C, Li B, Wang F, He W, Wang J, Mei Z. Small molecule inhibitors reveal allosteric regulation of USP14 via steric blockade. Cell Res 2018; 28:1186-1194. [PMID: 30254335 PMCID: PMC6274642 DOI: 10.1038/s41422-018-0091-x] [Citation(s) in RCA: 73] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2018] [Revised: 08/13/2018] [Accepted: 08/30/2018] [Indexed: 01/13/2023] Open
Abstract
The ubiquitin system is important for drug discovery, and the discovery of selective small-molecule inhibitors of deubiquitinating enzymes (DUBs) remains an active yet extremely challenging task. With a few exceptions, previously developed inhibitors have been found to bind the evolutionarily conserved catalytic centers of DUBs, resulting in poor selectivity. The small molecule IU1 was the first-ever specific inhibitor identified and exhibited surprisingly excellent selectivity for USP14 over other DUBs. However, the molecular mechanism for this selectivity was elusive. Herein, we report the high-resolution co-crystal structures of the catalytic domain of USP14 bound to IU1 and three IU1 derivatives. All the structures of these complexes indicate that IU1 and its analogs bind to a previously unknown steric binding site in USP14, thus blocking the access of the C-terminus of ubiquitin to the active site of USP14 and abrogating USP14 activity. Importantly, this steric site in USP14 is very unique, as suggested by structural alignments of USP14 with several known DUB X-ray structures. These results, in conjunction with biochemical characterization, indicate a coherent steric blockade mechanism for USP14 inhibition by compounds of the IU series. In light of the recent report of steric blockade of USP7 by FT671, this work suggests a potential generally applicable allosteric mechanism for the regulation of DUBs via steric blockade, as showcased by our discovery of IU1-248 which is 10-fold more potent than IU1.
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Affiliation(s)
- Yiwei Wang
- Tsinghua-Peking Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing, 100084, China
| | - Yuxuan Jiang
- School of Pharmaceutical Sciences, Tsinghua University, Beijing, 100084, China
| | - Shan Ding
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Jiawang Li
- School of Life Science, Beijing Institute of Technology, Beijing, 100081, China
| | - Ningjing Song
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, China.,School of Life Sciences, Anhui Agricultural University, Hefei, Anhui, 230026, China
| | - Yujing Ren
- School of Life Science, Beijing Institute of Technology, Beijing, 100081, China
| | - Danning Hong
- School of Life Science, Beijing Institute of Technology, Beijing, 100081, China
| | - Cai Wu
- School of Pharmaceutical Sciences, Tsinghua University, Beijing, 100084, China
| | - Bin Li
- School of Pharmaceutical Sciences, Tsinghua University, Beijing, 100084, China
| | - Feng Wang
- School of Life Science, Beijing Institute of Technology, Beijing, 100081, China.
| | - Wei He
- School of Pharmaceutical Sciences, Tsinghua University, Beijing, 100084, China.
| | - Jiawei Wang
- Tsinghua-Peking Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing, 100084, China.
| | - Ziqing Mei
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, China.
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13
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Jingjing W, Wenzheng G, Donghua W, Guangyu H, Aiping Z, Wenjuan W. Deubiquitination and stabilization of programmed cell death ligand 1 by ubiquitin-specific peptidase 9, X-linked in oral squamous cell carcinoma. Cancer Med 2018; 7:4004-4011. [PMID: 29992764 PMCID: PMC6089178 DOI: 10.1002/cam4.1675] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Revised: 06/10/2018] [Accepted: 06/16/2018] [Indexed: 12/12/2022] Open
Abstract
Background The immune checkpoint protein programmed cell death ligand 1 (PD‐L1) binds to PD1 to promote tumor cell escape from the killing effect of the immune system. However, there are few studies on the regulatory mechanisms of PD‐L1 in tumors. Although PD‐L1 has been reported to undergo ubiquitination in some cancers, its regulatory mechanisms in oral squamous cell carcinoma (OSCC) are unclear. Therefore, we aimed to investigate this phenomenon. Methods We examined the expression and function of USP9X and PD‐L1 in human oral keratinocytes (HOK) and OSCC cell lines (HN4 and HN30) as the control and relevant cancer cells using western blotting, immunoprecipitation, immunohistochemistry (IHC), T‐cell‐mediated tumor cell killing assay, and liquid chromatography‐mass spectrometry. Results Programmed cell death ligand 1 was highly expressed in OSCC by the regulation of the ubiquitin‐proteasome pathway. Furthermore, we discovered that ubiquitin‐specific peptidase 9, X‐linked (USP9X) could be combined with PD‐L1 to induce its deubiquitination and stabilize its protein expression in OSCC. Conclusion Our data indicate that USP9X deubiquitinates and stabilizes PD‐L1. Suppressing the expression of USP9X blocks tumor cell growth. The results provide a theoretical basis for USP9X as a therapeutic target.
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Affiliation(s)
- Wu Jingjing
- Department of Laboratory Medicine, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
| | - Guo Wenzheng
- Department of Laboratory Medicine, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China.,Key Laboratory of Cell Differentiation and Apoptosis of The Chinese Ministry of Education, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Wen Donghua
- Department of Laboratory Medicine, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
| | - Hou Guangyu
- Department of Oral and Maxillofacial surgery, Hospital of Stomatology, Tongji University, Shanghai, China
| | - Zhou Aiping
- Department of Laboratory Medicine, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
| | - Wu Wenjuan
- Department of Laboratory Medicine, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
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14
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Kropp KN, Maurer S, Rothfelder K, Schmied BJ, Clar KL, Schmidt M, Strunz B, Kopp HG, Steinle A, Grünebach F, Rittig SM, Salih HR, Dörfel D. The novel deubiquitinase inhibitor b-AP15 induces direct and NK cell-mediated antitumor effects in human mantle cell lymphoma. Cancer Immunol Immunother 2018; 67:935-947. [PMID: 29556699 PMCID: PMC11028140 DOI: 10.1007/s00262-018-2151-y] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2017] [Accepted: 03/12/2018] [Indexed: 12/18/2022]
Abstract
The first therapeutic proteasome inhibitor bortezomib has clinical efficacy in mantle cell lymphoma (MCL) which resulted in its incorporation in treatment algorithms for this disease. Impairment of proteasomal function by bortezomib is mediated via inhibition of the 20S core particle. However, proteasome function can also be modified by targeting upstream components of the ubiquitin-proteasome system. Recently, b-AP15 has been identified as a small molecule achieving proteasome inhibition by targeting the deubiquitinase (DUB) activity of the 19S regulatory subunit and was found to inhibit cancer cell growth in preclinical analyses. In the present study, both direct antitumor effects and the possibility to induce natural killer group 2 member D ligands (NKG2DL) to reinforce NK cell immunity with b-AP15 were investigated to provide a rational basis for clinical evaluation of this novel DUB inhibitor in MCL. Treatment with b-AP15 resulted in reduced viability as well as induction of apoptosis in a time- and dose-dependent manner, which could be attributed to caspase activation in MCL cells. In addition, treatment with b-AP15 differentially induced NKG2DL expression and subsequent NK cell lysis of MCL cells. These results indicate that the DUB inhibitor b-AP15 displays substantial antitumor activity in human MCL and suggest that b-AP15 might be a novel therapeutic option in the treatment of MCL that warrants clinical investigation.
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Affiliation(s)
- Korbinian N Kropp
- Clinical Collaboration Unit Translational Immunology, German Cancer Consortium (DKTK), German Cancer Research Center (DKFZ), Partner site Tübingen, Otfried-Müller-Str. 10, 72076, Tübingen, Germany
| | - Stefanie Maurer
- Clinical Collaboration Unit Translational Immunology, German Cancer Consortium (DKTK), German Cancer Research Center (DKFZ), Partner site Tübingen, Otfried-Müller-Str. 10, 72076, Tübingen, Germany
| | - Kathrin Rothfelder
- Clinical Collaboration Unit Translational Immunology, German Cancer Consortium (DKTK), German Cancer Research Center (DKFZ), Partner site Tübingen, Otfried-Müller-Str. 10, 72076, Tübingen, Germany
| | - Bastian J Schmied
- Clinical Collaboration Unit Translational Immunology, German Cancer Consortium (DKTK), German Cancer Research Center (DKFZ), Partner site Tübingen, Otfried-Müller-Str. 10, 72076, Tübingen, Germany
| | - Kim L Clar
- Clinical Collaboration Unit Translational Immunology, German Cancer Consortium (DKTK), German Cancer Research Center (DKFZ), Partner site Tübingen, Otfried-Müller-Str. 10, 72076, Tübingen, Germany
| | - Moritz Schmidt
- Clinical Collaboration Unit Translational Immunology, German Cancer Consortium (DKTK), German Cancer Research Center (DKFZ), Partner site Tübingen, Otfried-Müller-Str. 10, 72076, Tübingen, Germany
| | - Benedikt Strunz
- Clinical Collaboration Unit Translational Immunology, German Cancer Consortium (DKTK), German Cancer Research Center (DKFZ), Partner site Tübingen, Otfried-Müller-Str. 10, 72076, Tübingen, Germany
| | - Hans-Georg Kopp
- Department of Medical Oncology, Hematology, Immunology, Rheumatology and Pulmology, University Hospital Tübingen, Otfried-Müller-Str. 10, 72076, Tübingen, Germany
- Departments of Molecular Oncology and Thoracic Oncology, Robert-Bosch-Hospital Stuttgart, Auerbachstr. 110, 70376, Stuttgart, Germany
| | - Alexander Steinle
- Institute for Molecular Medicine, Goethe University, Theodor-Stern-Kai 7, 60590, Frankfurt am Main, Germany
| | - Frank Grünebach
- Department of Medical Oncology, Hematology, Immunology, Rheumatology and Pulmology, University Hospital Tübingen, Otfried-Müller-Str. 10, 72076, Tübingen, Germany
| | - Susanne M Rittig
- Department of Medical Oncology, Hematology, Immunology, Rheumatology and Pulmology, University Hospital Tübingen, Otfried-Müller-Str. 10, 72076, Tübingen, Germany
- Department of Hematology, Oncology and Tumor Immunology, Charité Universitätsmedizin Berlin, Hindenburgdamm 30, 12203, Berlin, Germany
| | - Helmut R Salih
- Clinical Collaboration Unit Translational Immunology, German Cancer Consortium (DKTK), German Cancer Research Center (DKFZ), Partner site Tübingen, Otfried-Müller-Str. 10, 72076, Tübingen, Germany
- Department of Medical Oncology, Hematology, Immunology, Rheumatology and Pulmology, University Hospital Tübingen, Otfried-Müller-Str. 10, 72076, Tübingen, Germany
| | - Daniela Dörfel
- Clinical Collaboration Unit Translational Immunology, German Cancer Consortium (DKTK), German Cancer Research Center (DKFZ), Partner site Tübingen, Otfried-Müller-Str. 10, 72076, Tübingen, Germany.
- Department of Medical Oncology, Hematology, Immunology, Rheumatology and Pulmology, University Hospital Tübingen, Otfried-Müller-Str. 10, 72076, Tübingen, Germany.
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15
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Chen X, Yang Q, Xiao L, Tang D, Dou QP, Liu J. Metal-based proteasomal deubiquitinase inhibitors as potential anticancer agents. Cancer Metastasis Rev 2018; 36:655-668. [PMID: 29039082 PMCID: PMC5721122 DOI: 10.1007/s10555-017-9701-1] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Deubiquitinases (DUBs) play an important role in protein quality control in eukaryotic cells due to their ability to specifically remove ubiquitin from substrate proteins. Therefore, recent findings have focused on the relevance of DUBs to cancer development, and pharmacological intervention on these enzymes has become a promising strategy for cancer therapy. In particular, several DUBs are physically and/or functionally associated with the proteasome and are attractive targets for the development of novel anticancer drugs. The successful clinical application of cisplatin in cancer treatment has prompted researchers to develop various metal-based anticancer agents with new properties. Recently, we have reported that several metal-based drugs, such as the antirheumatic gold agent auranofin (AF), the antifouling paint biocides copper pyrithione (CuPT) and zinc pyrithione (ZnPT), and also our two synthesized complexes platinum pyrithione (PtPT) and nickel pyrithione (NiPT), can target the proteasomal DUBs UCHL5 and USP14. In this review, we summarize the recently reported small molecule inhibitors of proteasomal DUBs, with a focus on discussion of the unique nature of metal-based proteasomal DUB inhibitors and their anticancer activity.
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Affiliation(s)
- Xin Chen
- Protein Modification and Degradation Lab, School of Basic Medical Sciences, Affiliated Tumor Hospital of Guangzhou Medical University, Guangzhou, China
| | - Qianqian Yang
- Protein Modification and Degradation Lab, School of Basic Medical Sciences, Affiliated Tumor Hospital of Guangzhou Medical University, Guangzhou, China
| | - Lu Xiao
- Protein Modification and Degradation Lab, School of Basic Medical Sciences, Affiliated Tumor Hospital of Guangzhou Medical University, Guangzhou, China
| | - Daolin Tang
- Protein Modification and Degradation Lab, School of Basic Medical Sciences, Affiliated Tumor Hospital of Guangzhou Medical University, Guangzhou, China.,Department of Surgery, University of Pittsburgh, Pittsburgh, PA, 15213, USA
| | - Q Ping Dou
- Protein Modification and Degradation Lab, School of Basic Medical Sciences, Affiliated Tumor Hospital of Guangzhou Medical University, Guangzhou, China.,The Molecular Therapeutics Program, Barbara Ann Karmanos Cancer Institute, Detroit, USA.,Department of Oncology, Pharmacology and Pathology, School of Medicine, Wayne State University, Detroit, MI, 48201-2013, USA
| | - Jinbao Liu
- Protein Modification and Degradation Lab, School of Basic Medical Sciences, Affiliated Tumor Hospital of Guangzhou Medical University, Guangzhou, China.
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16
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Deubiquitinase inhibitor b-AP15 activates endoplasmic reticulum (ER) stress and inhibits Wnt/Notch1 signaling pathway leading to the reduction of cell survival in hepatocellular carcinoma cells. Eur J Pharmacol 2018; 825:10-18. [PMID: 29454609 DOI: 10.1016/j.ejphar.2018.02.020] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2017] [Revised: 02/01/2018] [Accepted: 02/14/2018] [Indexed: 12/11/2022]
Abstract
b-AP15, a potent and selective inhibitor of the ubiquitin-specific peptidase 14 (USP14), displays in vitro and in vivo antitumor abilities on some types of cancer cells. However, the mechanism underlying its action is not well elucidated. The purposes of the present study are to observe the potential impacts of b-AP15 on cell survival of hepatocellular carcinoma cells and to investigate whether and how this compound inhibits some survival-promoting signaling pathways. We found that b-AP15 significantly decreased cell viability and increased cell apoptosis in a dose-dependent manner in hepatocellular carcinoma cells, along with the perturbation of cell cycle and the decreased expressions of cell cycle-related proteins. We also demonstrated that the endoplasmic reticulum (ER) stress and the unfolded protein response (UPR) were enhanced by b-AP15 supplementation. The inhibition of ER stress/UPR only partly attenuated the cytotoxicity of b-AP15 on hepatocellular carcinoma cells. In addition, b-AP15 treatment inhibited Wnt/β-catenin and Notch1 signaling pathways, and suppressed phosphorylation of STAT3, Akt, and Erk1/2, which were not restored by the inhibition of ER stress/UPR. Furthermore, the expression levels of signaling molecules in Notch1 were reduced by specific inhibitor of Wnt/β-catenin pathway. Notably, either Wnt or Notch1 signaling inhibitor mitigated phosphorylation of STAT3, Akt, and Erk1/2, and mimicked the cytotoxicity of b-AP15 on hepatocellular carcinoma cells. These results clearly indicate that b-AP15 induced cytotoxic response to hepatocellular carcinoma cells by augmenting ER stress/UPR and inhibiting Wnt/Notch1 signaling pathways. This new finding provides a novel mechanism by which b-AP15 produces its antitumor therapeutic effects.
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17
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Cai J, Xia X, Liao Y, Liu N, Guo Z, Chen J, Yang L, Long H, Yang Q, Zhang X, Xiao L, Wang X, Huang H, Liu J. A novel deubiquitinase inhibitor b-AP15 triggers apoptosis in both androgen receptor-dependent and -independent prostate cancers. Oncotarget 2017; 8:63232-63246. [PMID: 28968984 PMCID: PMC5609916 DOI: 10.18632/oncotarget.18774] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2017] [Accepted: 05/22/2017] [Indexed: 12/16/2022] Open
Abstract
Prostate cancer (PCa) remains a leading cause of cancer-related death in men. Especially, a subset of patients will eventually progress to the metastatic castrate-resistant prostate cancer (CRPC) which is currently incurable. Deubiquitinases (DUBs) associated with the 19S proteasome regulatory particle are increasingly emerging as significant therapeutic targets in numerous cancers. Recently, a novel small molecule b-AP15 is identified as an inhibitor of the USP14/UCHL5 (DUBs) of the 19S proteasome, resulting in cell growth inhibition and apoptosis in several human cancer cell lines. Here, we studied the therapeutic effect of b-AP15 in PCa, and our results indicate that (i) b-AP15 decreases viability, proliferation and triggers cytotoxicity to both androgen receptor-dependent and -independent PCa cells in vitro and in vivo, associated with caspase activation, inhibition of mitochondria function, increased reactive oxygen species (ROS) generation and endoplasmic reticulum (ER) stress; (ii) pan-caspase inhibitor z-VAD-FMK and ROS scavenger N-acetyl-L-cysteine (NAC) efficiently block apoptosis but not proteasome inhibition induced by exposure of b-AP15; (iii) treatment with b-AP15 in androgen-dependent prostate cancer (ADPC) cells down-regulates the expression of androgen receptor (AR), which is degraded via the ubiquitin proteasome system. Hence, the potent anti-tumor effect of b-AP15 on both androgen receptor-dependent and -independent PCa cells identifies a new promising therapeutic strategy for prostate cancer.
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Affiliation(s)
- Jianyu Cai
- Protein Modification and Degradation Lab, SKLRD, School of Basic Medical Sciences, The Affiliated Cancer Hospital of Guangzhou Medical University, Guangdong 511436, China
| | - Xiaohong Xia
- Protein Modification and Degradation Lab, SKLRD, School of Basic Medical Sciences, The Affiliated Cancer Hospital of Guangzhou Medical University, Guangdong 511436, China
| | - Yuning Liao
- Protein Modification and Degradation Lab, SKLRD, School of Basic Medical Sciences, The Affiliated Cancer Hospital of Guangzhou Medical University, Guangdong 511436, China
| | - Ningning Liu
- Protein Modification and Degradation Lab, SKLRD, School of Basic Medical Sciences, The Affiliated Cancer Hospital of Guangzhou Medical University, Guangdong 511436, China.,Guangzhou Institute of Cardiovascular Disease, The Second Affiliated Hospital, Guangzhou Medical University, Guangzhou, Guangdong 510260, China
| | - Zhiqiang Guo
- Protein Modification and Degradation Lab, SKLRD, School of Basic Medical Sciences, The Affiliated Cancer Hospital of Guangzhou Medical University, Guangdong 511436, China
| | - Jinghong Chen
- Protein Modification and Degradation Lab, SKLRD, School of Basic Medical Sciences, The Affiliated Cancer Hospital of Guangzhou Medical University, Guangdong 511436, China
| | - Li Yang
- Protein Modification and Degradation Lab, SKLRD, School of Basic Medical Sciences, The Affiliated Cancer Hospital of Guangzhou Medical University, Guangdong 511436, China
| | - Huidan Long
- Protein Modification and Degradation Lab, SKLRD, School of Basic Medical Sciences, The Affiliated Cancer Hospital of Guangzhou Medical University, Guangdong 511436, China
| | - Qianqian Yang
- Protein Modification and Degradation Lab, SKLRD, School of Basic Medical Sciences, The Affiliated Cancer Hospital of Guangzhou Medical University, Guangdong 511436, China
| | - Xiaolan Zhang
- Protein Modification and Degradation Lab, SKLRD, School of Basic Medical Sciences, The Affiliated Cancer Hospital of Guangzhou Medical University, Guangdong 511436, China
| | - Lu Xiao
- Protein Modification and Degradation Lab, SKLRD, School of Basic Medical Sciences, The Affiliated Cancer Hospital of Guangzhou Medical University, Guangdong 511436, China
| | - Xuejun Wang
- Protein Modification and Degradation Lab, SKLRD, School of Basic Medical Sciences, The Affiliated Cancer Hospital of Guangzhou Medical University, Guangdong 511436, China.,Division of Basic Biomedical Sciences, Sanford School of Medicine of The University of South Dakota, Vermillion, South Dakota 57069, USA
| | - Hongbiao Huang
- Protein Modification and Degradation Lab, SKLRD, School of Basic Medical Sciences, The Affiliated Cancer Hospital of Guangzhou Medical University, Guangdong 511436, China
| | - Jinbao Liu
- Protein Modification and Degradation Lab, SKLRD, School of Basic Medical Sciences, The Affiliated Cancer Hospital of Guangzhou Medical University, Guangdong 511436, China
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