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Zhang W, Xu Z, Du Y, Liu T, Xiong Z, Hu J, Chen L, Peng X, Zhou F. Identification of STAM-binding protein as a target for the treatment of gemcitabine resistance pancreatic cancer in a nutrient-poor microenvironment. Cell Death Dis 2024; 15:657. [PMID: 39242557 PMCID: PMC11379802 DOI: 10.1038/s41419-024-07048-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2024] [Revised: 08/27/2024] [Accepted: 09/02/2024] [Indexed: 09/09/2024]
Abstract
Pancreatic cancer (PC) is a highly malignant solid tumor whose resistance to gemcitabine (GEM) chemotherapy is a major cause of poor patient prognosis. Although PC is known to thrive on malnutrition, the mechanism underlying its chemotherapy resistance remains unclear. The current study analyzed clinical tissue sample databases using bioinformatics tools and observed significantly upregulated expression of the deubiquitinase STAMBP in PC tissues. Functional experiments revealed that STAMBP knockdown remarkably increases GEM sensitivity in PC cells. Multiple omics analyses suggested that STAMBP enhances aerobic glycolysis and suppresses mitochondrial respiration to increase GEM resistance in PC both in vitro and in vivo. STAMBP knockdown decreased PDK1 levels, an essential regulator of the aerobic glycolytic process, in several cancers. Mechanistically, STAMBP promoted the PDK1-mediated Warburg effect and chemotherapy resistance by modulating E2F1 via direct binding to E2F1 and suppressing its degradation and ubiquitination. High-throughput compound library screening using three-dimensional protein structure analysis and drug screening identified the FDA drug entrectinib as a potent GEM sensitizer and STAMBP inhibitor, augmenting the antitumor effect of GEM in a patient-derived xenograft (PDX) model. Overall, we established a novel mechanism, via the STAMBP-E2F1-PDK1 axis, by which PC cells become chemoresistant in a nutrient-poor tumor microenvironment.
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Affiliation(s)
- Wenming Zhang
- Department of General Surgery, The Second Affiliated Hospital of Nanchang University, 1 Minde Road, Nanchang, 330006, Jiangxi, PR China
| | - Zheng Xu
- Department of General Surgery, The Second Affiliated Hospital of Nanchang University, 1 Minde Road, Nanchang, 330006, Jiangxi, PR China
| | - Yunyan Du
- Department of Pharmacology, Nanchang University, 461 Bayi Avenue, Nanchang, 330006, Jiangxi, PR China
| | - Tiande Liu
- Department of General Surgery, The Second Affiliated Hospital of Nanchang University, 1 Minde Road, Nanchang, 330006, Jiangxi, PR China
| | - Zhijuan Xiong
- Department of Gastroenterology, The First Affiliated Hospital of Nanchang University, 17 Yongwaizheng Street, Nanchang, 330006, Jiangxi, PR China
| | - Junwen Hu
- Department of General Surgery, The Second Affiliated Hospital of Nanchang University, 1 Minde Road, Nanchang, 330006, Jiangxi, PR China
| | - Leifeng Chen
- Department of Oncology, The Second Affiliated Hospital of Nanchang University, 1 Minde Road, Nanchang, 330006, Jiangxi, PR China.
- Medical Center for Cardiovascular Diseases, Neurological Diseases and Tumors of Jiangxi Province, The Second Affiliated Hospital of Nanchang University, 1 Minde Road, Nanchang, 330006, Jiangxi, PR China.
- Laboratory of Translational Medicine, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, 100021, Beijing, PR China.
| | - Xiaogang Peng
- Jiangxi Province Key Laboratory of Molecular Medicine, The Second Affiliated Hospital of Nanchang University, 1 Minde Road, Nanchang, 330006, Jiangxi, PR China.
| | - Fan Zhou
- Department of General Surgery, The Second Affiliated Hospital of Nanchang University, 1 Minde Road, Nanchang, 330006, Jiangxi, PR China.
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Huang X, Tan J, Ji Y, Luo J, Zhao Y, Zhao J. BRCC3 mediates inflammation and pyroptosis in cerebral ischemia/reperfusion injury by activating the NLRP6 inflammasome. CNS Neurosci Ther 2024; 30:e14697. [PMID: 38544474 PMCID: PMC10973773 DOI: 10.1111/cns.14697] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Revised: 01/09/2024] [Accepted: 01/10/2024] [Indexed: 04/04/2024] Open
Abstract
AIMS Neuroinflammation and pyroptosis are key mediators of cerebral ischemia/reperfusion (I/R) injury-induced pathogenic cascades. BRCC3, the human homolog of BRCC36, is implicated in neurological disorders and plays a crucial role in neuroinflammation and pyroptosis. However, its effects and potential mechanisms in cerebral I/R injury in mice are unclear. METHODS Cellular localization of BRCC3 and the interaction between BRCC3 and NLRP6 were assessed. Middle cerebral artery occlusion/reperfusion (MCAO) and oxygen-glucose deprivation/reoxygenation (OGD/R) models were established in mice and HT22 cells, respectively, to simulate cerebral I/R injury in vivo and in vitro. RESULTS BRCC3 protein expression peaked 24 h after MCAO and OGD/R. BRCC3 knockdown reduced the inflammation and pyroptosis caused by cerebral I/R injury and ameliorated neurological deficits in mice after MCAO. The effects of BRCC3 on inflammation and pyroptosis may be mediated by NLRP6 inflammasome activation. Moreover, both BRCC3 and its N- and C-terminals interacted with NLRP6, and both BRCC3 and its terminals reduced NLRP6 ubiquitination. Additionally, BRCC3 affected the interaction between NLRP6 and ASC, which may be related to inflammasome activation. CONCLUSION BRCC3 shows promise as a novel target to enhance neurological recovery and attenuate the inflammatory responses and pyroptosis caused by NLRP6 activation in cerebral I/R injury.
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Affiliation(s)
- Xiaohuan Huang
- Department of PathologyChongqing Medical UniversityChongqingChina
- Department of PathologyChongqing Three Gorges Medical CollegeWanzhouChina
| | - Junyi Tan
- Department of PathophysiologyChongqing Medical UniversityChongqingChina
| | - Yanyan Ji
- Department of PathologyChongqing Medical UniversityChongqingChina
| | - Jing Luo
- Department of PathologyChongqing Medical UniversityChongqingChina
- Department of NeurologyThe First Affiliated Hospital of Chongqing Medical UniversityChongqingChina
| | - Yong Zhao
- Department of PathologyChongqing Medical UniversityChongqingChina
| | - Jing Zhao
- Department of PathophysiologyChongqing Medical UniversityChongqingChina
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Wang J, Wang T, Feng YK, Liu Y, Fu B, Liu XT, Wu QZ. Deubiquitinating enzyme PSMD7 promotes bladder cancer development: Involvement of RAB1A stabilization. Cell Signal 2024; 114:110996. [PMID: 38040402 DOI: 10.1016/j.cellsig.2023.110996] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Revised: 11/16/2023] [Accepted: 11/27/2023] [Indexed: 12/03/2023]
Abstract
BACKGROUND Proteasome 26S subunit, non-ATPase 7 (PSMD7) is a deubiquitinating enzyme that is involved in the stability of ubiquitinated proteins and participates in the development of multiple types of cancer. The roles of PSMD7 and its potential mechanisms in bladder cancer (BC) remain elusive. METHODS In this study, we identified that PSMD7 was overexpressed in BC tissues based on gene expression omnibus (GEO) database and TNMplot web. To investigate the functional role of PSMD7, two BC cell lines, T24 and 5637, were selected. The cells were transfected with vectors containing short hairpin RNAs against PSMD7 or plasmids containing full-length PSMD7 to knockdown or overexpress PSMD7. RESULTS Our results revealed that silencing PSMD7 inhibited cell proliferation, cycle progression, migration, invasion, and promoted cell apoptosis, whereas PSMD7 overexpression led to the opposite effects in the BC cells. Mechanically, PSMD7 influenced the protein expression but not the mRNA expression of the Ras-related protein Rab-1 A (RAB1A). PSMD7 combined with RAB1A and negatively regulated its ubiquitination, indicating that PSMD7 enhanced the stability of RAB1A through post-transcriptional modification. Moreover, the rescue experiment demonstrated that RAB1A was an important downstream effector molecule of PSMD7. Besides, the negative regulation of silencing PSMD7 on tumor growth was confirmed in mice. CONCLUSIONS Our study substantiated a novel mechanism by which PSMD7 stabilized RAB1A to accelerate the progression of BC.
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Affiliation(s)
- Jun Wang
- Department of Urology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan Province, China.
| | - Tao Wang
- Department of Urology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan Province, China
| | - Yuan-Kang Feng
- Department of Urology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan Province, China
| | - Yu Liu
- Department of Urology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan Province, China
| | - Bo Fu
- Department of Urology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan Province, China
| | - Xiao-Tong Liu
- Department of Urology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan Province, China
| | - Qi-Zhe Wu
- Department of Urology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan Province, China
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Klonisch T, Logue SE, Hombach-Klonisch S, Vriend J. DUBing Primary Tumors of the Central Nervous System: Regulatory Roles of Deubiquitinases. Biomolecules 2023; 13:1503. [PMID: 37892185 PMCID: PMC10605193 DOI: 10.3390/biom13101503] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Revised: 10/04/2023] [Accepted: 10/07/2023] [Indexed: 10/29/2023] Open
Abstract
The ubiquitin proteasome system (UPS) utilizes an orchestrated enzymatic cascade of E1, E2, and E3 ligases to add single or multiple ubiquitin-like molecules as post-translational modification (PTM) to proteins. Ubiquitination can alter protein functions and/or mark ubiquitinated proteins for proteasomal degradation but deubiquitinases (DUBs) can reverse protein ubiquitination. While the importance of DUBs as regulatory factors in the UPS is undisputed, many questions remain on DUB selectivity for protein targeting, their mechanism of action, and the impact of DUBs on the regulation of diverse biological processes. Furthermore, little is known about the expression and role of DUBs in tumors of the human central nervous system (CNS). In this comprehensive review, we have used publicly available transcriptional datasets to determine the gene expression profiles of 99 deubiquitinases (DUBs) from five major DUB families in seven primary pediatric and adult CNS tumor entities. Our analysis identified selected DUBs as potential new functional players and biomarkers with prognostic value in specific subtypes of primary CNS tumors. Collectively, our analysis highlights an emerging role for DUBs in regulating CNS tumor cell biology and offers a rationale for future therapeutic targeting of DUBs in CNS tumors.
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Affiliation(s)
- Thomas Klonisch
- Department of Human Anatomy and Cell Science, Rady Faculty of Health Sciences, Max Rady College of Medicine, University of Manitoba, Winnipeg, MB R3E 0J9, Canada
- Department of Pathology, Rady Faculty of Health Sciences, Max Rady College of Medicine, University of Manitoba, Winnipeg, MB R3E 0J9, Canada
- Department of Medical Microbiology & Infectious Diseases, Rady Faculty of Health Sciences, Max Rady College of Medicine, University of Manitoba, Winnipeg, MB R3E 0J9, Canada
- CancerCare Research Institute, CancerCare Manitoba, Winnipeg, MB R3E 0J9, Canada
| | - Susan E. Logue
- Department of Human Anatomy and Cell Science, Rady Faculty of Health Sciences, Max Rady College of Medicine, University of Manitoba, Winnipeg, MB R3E 0J9, Canada
- CancerCare Research Institute, CancerCare Manitoba, Winnipeg, MB R3E 0J9, Canada
| | - Sabine Hombach-Klonisch
- Department of Human Anatomy and Cell Science, Rady Faculty of Health Sciences, Max Rady College of Medicine, University of Manitoba, Winnipeg, MB R3E 0J9, Canada
- Department of Pathology, Rady Faculty of Health Sciences, Max Rady College of Medicine, University of Manitoba, Winnipeg, MB R3E 0J9, Canada
| | - Jerry Vriend
- Department of Human Anatomy and Cell Science, Rady Faculty of Health Sciences, Max Rady College of Medicine, University of Manitoba, Winnipeg, MB R3E 0J9, Canada
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Xu Q, He L, Zhang S, Di X, Jiang H. Deubiquitinase OTUD3: a double-edged sword in immunity and disease. Front Cell Dev Biol 2023; 11:1237530. [PMID: 37829187 PMCID: PMC10566363 DOI: 10.3389/fcell.2023.1237530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Accepted: 08/28/2023] [Indexed: 10/14/2023] Open
Abstract
Deubiquitination is an important form of post-translational modification that regulates protein homeostasis. Ovarian tumor domain-containing proteins (OTUDs) subfamily member OTUD3 was identified as a deubiquitinating enzyme involved in the regulation of various physiological processes such as immunity and inflammation. Disturbances in these physiological processes trigger diseases in humans and animals, such as cancer, neurodegenerative diseases, diabetes, mastitis, etc. OTUD3 is aberrantly expressed in tumors and is a double-edged sword, exerting tumor-promoting or anti-tumor effects in different types of tumors affecting cancer cell proliferation, metastasis, and metabolism. OTUD3 is regulated at the transcriptional level by a number of MicroRNAs, such as miR-520h, miR-32, and miR101-3p. In addition, OTUD3 is regulated by a number of post-translational modifications, such as acetylation and ubiquitination. Therefore, understanding the regulatory mechanisms of OTUD3 expression can help provide insight into its function in human immunity and disease, offering the possibility of its use as a therapeutic target to diagnose or treat disease.
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Affiliation(s)
- Qiao Xu
- Department of Cell Biology, School of Life Sciences, Central South University, Changsha, Hunan, China
| | - Lan He
- School of Biomedical Science, Hunan University, Changsha, Hunan, China
| | - Shubing Zhang
- Department of Cell Biology, School of Life Sciences, Central South University, Changsha, Hunan, China
| | - Xiaotang Di
- Department of Cell Biology, School of Life Sciences, Central South University, Changsha, Hunan, China
| | - Hao Jiang
- Department of Biomedical Informatics, School of Life Sciences, Central South University, Changsha, Hunan, China
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Tang JQ, Marchand MM, Veggiani G. Ubiquitin Engineering for Interrogating the Ubiquitin-Proteasome System and Novel Therapeutic Strategies. Cells 2023; 12:2117. [PMID: 37626927 PMCID: PMC10453149 DOI: 10.3390/cells12162117] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 08/10/2023] [Accepted: 08/11/2023] [Indexed: 08/27/2023] Open
Abstract
Protein turnover, a highly regulated process governed by the ubiquitin-proteasome system (UPS), is essential for maintaining cellular homeostasis. Dysregulation of the UPS has been implicated in various diseases, including viral infections and cancer, making the proteins in the UPS attractive targets for therapeutic intervention. However, the functional and structural redundancies of UPS enzymes present challenges in identifying precise drug targets and achieving target selectivity. Consequently, only 26S proteasome inhibitors have successfully advanced to clinical use thus far. To overcome these obstacles, engineered peptides and proteins, particularly engineered ubiquitin, have emerged as promising alternatives. In this review, we examine the impact of engineered ubiquitin on UPS and non-UPS proteins, as well as on viral enzymes. Furthermore, we explore their potential to guide the development of small molecules targeting novel surfaces, thereby expanding the range of druggable targets.
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Affiliation(s)
- Jason Q. Tang
- Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, 160 College Street, Toronto, ON M5S3E1, Canada
- Department of Molecular Genetics, University of Toronto, 160 College Street, Toronto, ON M5S3E1, Canada
| | - Mary M. Marchand
- Department of Pathobiological Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, LA 70803, USA
| | - Gianluca Veggiani
- Department of Pathobiological Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, LA 70803, USA
- Division of Biotechnology and Molecular Medicine, Louisiana State University, Baton Rouge, LA 70803, USA
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Yang Y, Song R, Gao Y, Yu H, Wang S. Regulatory mechanisms and therapeutic potential of JAB1 in neurological development and disorders. Mol Med 2023; 29:80. [PMID: 37365502 DOI: 10.1186/s10020-023-00675-w] [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] [Received: 04/10/2023] [Accepted: 05/30/2023] [Indexed: 06/28/2023] Open
Abstract
c-Jun activation domain binding protein-1 (JAB1) is a multifunctional regulator that plays vital roles in diverse cellular processes. It regulates AP-1 transcriptional activity and also acts as the fifth component of the COP9 signalosome complex. While JAB1 is considered an oncoprotein that triggers tumor development, recent studies have shown that it also functions in neurological development and disorders. In this review, we summarize the general features of the JAB1 gene and protein, and present recent updates on the regulation of JAB1 expression. Moreover, we also highlight the functional roles and regulatory mechanisms of JAB1 in neurodevelopmental processes such as neuronal differentiation, synaptic morphogenesis, myelination, and hair cell development and in the pathogenesis of some neurological disorders such as Alzheimer's disease, multiple sclerosis, neuropathic pain, and peripheral nerve injury. Furthermore, current challenges and prospects are discussed, including updates on drug development targeting JAB1.
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Affiliation(s)
- Yu Yang
- Department of Psychiatry, Jining Medical University, Jianshe South Road No. 45, Jining, Shandong, China
- Shandong Collaborative Innovation Center for Diagnosis, Treatment and Behavioral Interventions of Mental Disorders, Jining Medical University, Jining, Shandong, China
| | - Ruying Song
- Department of Psychiatry, Jining Medical University, Jianshe South Road No. 45, Jining, Shandong, China
- Shandong Collaborative Innovation Center for Diagnosis, Treatment and Behavioral Interventions of Mental Disorders, Jining Medical University, Jining, Shandong, China
| | - Yiming Gao
- Department of Psychiatry, Jining Medical University, Jianshe South Road No. 45, Jining, Shandong, China
- Shandong Collaborative Innovation Center for Diagnosis, Treatment and Behavioral Interventions of Mental Disorders, Jining Medical University, Jining, Shandong, China
| | - Hao Yu
- Department of Psychiatry, Jining Medical University, Jianshe South Road No. 45, Jining, Shandong, China.
- Shandong Collaborative Innovation Center for Diagnosis, Treatment and Behavioral Interventions of Mental Disorders, Jining Medical University, Jining, Shandong, China.
| | - Shuai Wang
- Department of Psychiatry, Jining Medical University, Jianshe South Road No. 45, Jining, Shandong, China.
- Shandong Collaborative Innovation Center for Diagnosis, Treatment and Behavioral Interventions of Mental Disorders, Jining Medical University, Jining, Shandong, China.
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The expression and clinical significance of STAMBP in breast cancer. Mol Biol Rep 2023; 50:899-906. [PMID: 36309616 DOI: 10.1007/s11033-022-07964-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2022] [Accepted: 09/21/2022] [Indexed: 02/01/2023]
Abstract
BACKGROUND Breast cancer is the leading cause of death from cancer in women worldwide. STAMBP functions as a JAMM family deubiquitinating enzyme that modulates the stability of substrate proteins in cells by cleaving ubiquitin moieties. The expression of STAMBP and its clinical significance in breast cancer remain unclear. METHODS AND RESULTS The level of the STAMBP protein in noncancerous and tumor tissues of breast cancer patients was examined by immunohistochemical staining. The expression of STAMBP mRNA in tissues based on healthy individual and breast cancer patient data in the TCGA database was evaluated. The association between the expression of STAMBP mRNA and clinical features and prognosis was evaluated using TCGA database. Cell growth was assessed by Cell Counting Kit-8 (CCK-8) assay, and cell migration and invasion were assessed by wound healing and Transwell assays. Activation of the ERK signaling was detected by Western blotting. The expression of STAMBP was markedly upregulated in the cytoplasm of tumor cells from breast cancer patients. The level of STAMBP was closely associated with the tumor subtype and size and the TNM stage of the breast cancer patients. Importantly, high expression of STAMBP predicted poor overall survival (OS) for breast cancer patients. Furthermore, knockdown of STAMBP expression reduced cell mobility and invasion of breast cancer cells. Notably, the phosphorylation of EGFR and ERK was markedly reduced in STAMBP-knockdown cells. CONCLUSION STAMBP plays a critical role in the progression of breast cancer and may serve as a biomarker to monitor the progression of the disease.
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