1
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Guo B, Huo X, Xie X, Zhang X, Lian J, Zhang X, Gong Y, Dou H, Fan Y, Mao Y, Wang J, Hu H. Dynamic role of CUL4B in radiation-induced intestinal injury-regeneration. Sci Rep 2024; 14:9906. [PMID: 38689033 PMCID: PMC11061312 DOI: 10.1038/s41598-024-60704-4] [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: 01/18/2024] [Accepted: 04/26/2024] [Indexed: 05/02/2024] Open
Abstract
CUL4B, a crucial scaffolding protein in the largest E3 ubiquitin ligase complex CRL4B, is involved in a broad range of physiological and pathological processes. While previous research has shown that CUL4B participates in maintaining intestinal homeostasis and function, its involvement in facilitating intestinal recovery following ionizing radiation (IR) damage has not been fully elucidated. Here, we utilized in vivo and in vitro models to decipher the role of CUL4B in intestinal repair after IR-injury. Our findings demonstrated that prior to radiation exposure, CUL4B inhibited the ubiquitination modification of PSME3, which led to the accumulation of PSME3 and subsequent negative regulation of p53-mediated apoptosis. In contrast, after radiation, CUL4B dissociated from PSME3 and translocated into the nucleus at phosphorylated histones H2A (γH2AX) foci, thereby impeding DNA damage repair and augmenting p53-mediated apoptosis through inhibition of BRCA1 phosphorylation and RAD51. Our study elucidated the dynamic role of CUL4B in the repair of radiation-induced intestinal damage and uncovered novel molecular mechanisms underlying the repair process, suggesting a potential therapeutic strategy of intestinal damage after radiation therapy for cancers.
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Affiliation(s)
- Beibei Guo
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Systems Biomedicine and Research, School of Basic Medical Sciences, Cheeloo Medical College, Shandong University, Jinan, 250012, China
| | - Xiaohan Huo
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Systems Biomedicine and Research, School of Basic Medical Sciences, Cheeloo Medical College, Shandong University, Jinan, 250012, China
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, School of Basic Medical Sciences, Shandong University Cheeloo Medical College, Jinan, 250012, China
| | - Xueyong Xie
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, School of Basic Medical Sciences, Shandong University Cheeloo Medical College, Jinan, 250012, China
| | - Xiaohui Zhang
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Systems Biomedicine and Research, School of Basic Medical Sciences, Cheeloo Medical College, Shandong University, Jinan, 250012, China
| | - Jiabei Lian
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Systems Biomedicine and Research, School of Basic Medical Sciences, Cheeloo Medical College, Shandong University, Jinan, 250012, China
| | - Xiyu Zhang
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, School of Basic Medical Sciences, Shandong University Cheeloo Medical College, Jinan, 250012, China
| | - Yaoqin Gong
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, School of Basic Medical Sciences, Shandong University Cheeloo Medical College, Jinan, 250012, China
| | - Hao Dou
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, School of Basic Medical Sciences, Shandong University Cheeloo Medical College, Jinan, 250012, China
| | - Yujia Fan
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Systems Biomedicine and Research, School of Basic Medical Sciences, Cheeloo Medical College, Shandong University, Jinan, 250012, China
| | - Yunuo Mao
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Systems Biomedicine and Research, School of Basic Medical Sciences, Cheeloo Medical College, Shandong University, Jinan, 250012, China
| | - Jinshen Wang
- Department of Gastrointestinal Surgery, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, 250021, Shandong, China.
| | - Huili Hu
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Systems Biomedicine and Research, School of Basic Medical Sciences, Cheeloo Medical College, Shandong University, Jinan, 250012, China.
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2
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Cui J, Liu X, Shang Q, Sun S, Chen S, Dong J, Zhu Y, Liu L, Xia Y, Wang Y, Xiang L, Fan B, Zhan J, Zhou Y, Chen P, Zhao R, Liu X, Xing N, Wu D, Shi B, Zou Y. Deubiquitination of CDC6 by OTUD6A promotes tumour progression and chemoresistance. Mol Cancer 2024; 23:86. [PMID: 38685067 PMCID: PMC11057083 DOI: 10.1186/s12943-024-01996-y] [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: 12/04/2023] [Accepted: 04/05/2024] [Indexed: 05/02/2024] Open
Abstract
BACKGROUND CDC6 is an oncogenic protein whose expression level fluctuates during the cell cycle. Although several E3 ubiquitin ligases responsible for the ubiquitin-mediated proteolysis of CDC6 have been identified, the deubiquitination pathway for CDC6 has not been investigated. METHODS The proteome-wide deubiquitinase (DUB) screening was used to identify the potential regulator of CDC6. Immunofluorescence, protein half-life and deubiquitination assays were performed to determine the protein stability of CDC6. Gain- and loss-of-function experiments were implemented to analyse the impacts of OUTD6A-CDC6 axis on tumour growth and chemosensitivity in vitro. N-butyl-N-(4-hydroxybutyl) nitrosamine (BBN)-induced conditional Otud6a knockout (CKO) mouse model and tumour xenograft model were performed to analyse the role of OTUD6A-CDC6 axis in vivo. Tissue specimens were used to determine the association between OTUD6A and CDC6. RESULTS OTUD6A interacts with, depolyubiquitinates and stabilizes CDC6 by removing K6-, K33-, and K48-linked polyubiquitination. Moreover, OTUD6A promotes cell proliferation and decreases sensitivity to chemotherapy by upregulating CDC6. CKO mice are less prone to BCa tumorigenesis induced by BBN, and knockdown of OTUD6A inhibits tumour progression in vivo. Furthermore, OTUD6A protein level has a positive correlation with CDC6 protein level, and high protein levels of OTUD6A and CDC6 are associated with poor prognosis in patients with bladder cancer. CONCLUSIONS We reveal an important yet missing piece of novel DUB governing CDC6 stability. In addition, our findings propose a model for the OTUD6A-CDC6 axis that provides novel insights into cell cycle and chemosensitivity regulation, which may become a potential biomarker and promising drug target for cancer treatment.
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Affiliation(s)
- Jianfeng Cui
- Department of Urology, Qilu Hospital, Department of Molecular Medicine and Genetics, School of Basic Medical Sciences, Shandong University, Jinan, Shandong, 250012, China
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, School of Basic Medical Sciences, Qilu Hospital, Shandong University, Jinan, Shandong, 250012, China
| | - Xiaochen Liu
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, School of Basic Medical Sciences, Qilu Hospital, Shandong University, Jinan, Shandong, 250012, China
- Department of Clinical laboratory, Qilu Hospital, Shandong University, Jinan, Shandong, 250012, China
| | - Qinghong Shang
- Helmholtz International Lab, State Key Laboratory of Microbial Technology, Shandong University, Qingdao, Shandong, 266237, China
| | - Shuna Sun
- Department of Dermatology, The Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Shandong Provincial Hospital of Traditional Chinese Medicine, Jinan, Shandong, 250011, China
| | - Shouzhen Chen
- Department of Urology, Qilu Hospital, Department of Molecular Medicine and Genetics, School of Basic Medical Sciences, Shandong University, Jinan, Shandong, 250012, China
| | - Jianping Dong
- Department of Urology, Shouguang People's Hospital, Weifang, Shandong, 262750, China
| | - Yaofeng Zhu
- Department of Urology, Qilu Hospital, Department of Molecular Medicine and Genetics, School of Basic Medical Sciences, Shandong University, Jinan, Shandong, 250012, China
| | - Lei Liu
- Department of Urology, Qilu Hospital, Department of Molecular Medicine and Genetics, School of Basic Medical Sciences, Shandong University, Jinan, Shandong, 250012, China
| | - Yangyang Xia
- Department of Urology, Qilu Hospital, Department of Molecular Medicine and Genetics, School of Basic Medical Sciences, Shandong University, Jinan, Shandong, 250012, China
| | - Yong Wang
- Department of Urology, Qilu Hospital, Department of Molecular Medicine and Genetics, School of Basic Medical Sciences, Shandong University, Jinan, Shandong, 250012, China
| | - Lu Xiang
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, School of Basic Medical Sciences, Qilu Hospital, Shandong University, Jinan, Shandong, 250012, China
| | - Bowen Fan
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, School of Basic Medical Sciences, Qilu Hospital, Shandong University, Jinan, Shandong, 250012, China
| | - Jiafeng Zhan
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, School of Basic Medical Sciences, Qilu Hospital, Shandong University, Jinan, Shandong, 250012, China
| | - Yadi Zhou
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, School of Basic Medical Sciences, Qilu Hospital, Shandong University, Jinan, Shandong, 250012, China
| | - Pengxiang Chen
- Department of Radiation Oncology, Qilu Hospital, Shandong University, Jinan, Shandong, 250012, China
| | - Renchang Zhao
- Department of Thoracic Surgery, Qilu Hospital, Shandong University, Jinan, Shandong, 250012, China
| | - Xiaofei Liu
- Departement of Breast and Thyroid Surgery, The Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Shandong Provincial Hospital of Traditional Chinese Medicine, Jinan, Shandong, 250011, China
| | - Nianzeng Xing
- Department of Urology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100021, China.
| | - Dalei Wu
- Helmholtz International Lab, State Key Laboratory of Microbial Technology, Shandong University, Qingdao, Shandong, 266237, China.
| | - Benkang Shi
- Department of Urology, Qilu Hospital, Department of Molecular Medicine and Genetics, School of Basic Medical Sciences, Shandong University, Jinan, Shandong, 250012, China.
| | - Yongxin Zou
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, School of Basic Medical Sciences, Qilu Hospital, Shandong University, Jinan, Shandong, 250012, China.
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3
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Ma Y, Liu X, Zhou M, Sun W, Jiang B, Liu Q, Wang M, Zou Y, Liu Q, Gong Y, Sun G. CUL4B mutations impair human cortical neurogenesis through PP2A-dependent inhibition of AKT and ERK. Cell Death Dis 2024; 15:121. [PMID: 38331954 PMCID: PMC10853546 DOI: 10.1038/s41419-024-06501-3] [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: 07/18/2023] [Revised: 01/24/2024] [Accepted: 01/25/2024] [Indexed: 02/10/2024]
Abstract
Mutation in CUL4B gene is one of the most common causes for X-linked intellectual disability (XLID). CUL4B is the scaffold protein in CUL4B-RING ubiquitin ligase (CRL4B) complex. While the roles of CUL4B in cancer progression and some developmental processes like adipogenesis, osteogenesis, and spermatogenesis have been studied, the mechanisms underlying the neurological disorders in patients with CUL4B mutations are poorly understood. Here, using 2D neuronal culture and cerebral organoids generated from the patient-derived induced pluripotent stem cells and their isogenic controls, we demonstrate that CUL4B is required to prevent premature cell cycle exit and precocious neuronal differentiation of neural progenitor cells. Moreover, loss-of-function mutations of CUL4B lead to increased synapse formation and enhanced neuronal excitability. Mechanistically, CRL4B complex represses transcription of PPP2R2B and PPP2R2C genes, which encode two isoforms of the regulatory subunit of protein phosphatase 2 A (PP2A) complex, through catalyzing monoubiquitination of H2AK119 in their promoter regions. CUL4B mutations result in upregulated PP2A activity, which causes inhibition of AKT and ERK, leading to premature cell cycle exit. Activation of AKT and ERK or inhibition of PP2A activity in CUL4B mutant organoids rescues the neurogenesis defect. Our work unveils an essential role of CUL4B in human cortical development.
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Affiliation(s)
- Yanyan Ma
- Key Laboratory of Experimental Teratology, Ministry of Education, Institute of Molecular Medicine and Genetics, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China
| | - Xiaolin Liu
- Key Laboratory of Experimental Teratology, Ministry of Education, Institute of Molecular Medicine and Genetics, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China
| | - Min Zhou
- Key Laboratory of Experimental Teratology, Ministry of Education, Institute of Molecular Medicine and Genetics, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China
| | - Wenjie Sun
- Key Laboratory of Experimental Teratology, Ministry of Education, Institute of Molecular Medicine and Genetics, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China
| | - Baichun Jiang
- Key Laboratory of Experimental Teratology, Ministry of Education, Institute of Molecular Medicine and Genetics, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China
| | - Qiao Liu
- Key Laboratory of Experimental Teratology, Ministry of Education, Institute of Molecular Medicine and Genetics, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China
| | - Molin Wang
- Key Laboratory of Experimental Teratology, Ministry of Education, Institute of Molecular Medicine and Genetics, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China
| | - Yongxin Zou
- Key Laboratory of Experimental Teratology, Ministry of Education, Institute of Molecular Medicine and Genetics, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China
| | - Qiji Liu
- Key Laboratory of Experimental Teratology, Ministry of Education, Institute of Molecular Medicine and Genetics, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China
| | - Yaoqin Gong
- Key Laboratory of Experimental Teratology, Ministry of Education, Institute of Molecular Medicine and Genetics, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China.
| | - Gongping Sun
- Key Laboratory of Experimental Teratology, Ministry of Education, Department of Histology and Embryology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China.
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4
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Dar AA, Kim DD, Gordon SM, Klinzing K, Rosen S, Guha I, Porter N, Ortega Y, Forsyth KS, Roof J, Fazelinia H, Spruce LA, Eisenlohr LC, Behrens EM, Oliver PM. c-Myc uses Cul4b to preserve genome integrity and promote antiviral CD8 + T cell immunity. Nat Commun 2023; 14:7098. [PMID: 37925424 PMCID: PMC10625626 DOI: 10.1038/s41467-023-42765-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Accepted: 10/17/2023] [Indexed: 11/06/2023] Open
Abstract
During infection, virus-specific CD8+ T cells undergo rapid bursts of proliferation and differentiate into effector cells that kill virus-infected cells and reduce viral load. This rapid clonal expansion can put T cells at significant risk for replication-induced DNA damage. Here, we find that c-Myc links CD8+ T cell expansion to DNA damage response pathways though the E3 ubiquitin ligase, Cullin 4b (Cul4b). Following activation, c-Myc increases the levels of Cul4b and other members of the Cullin RING Ligase 4 (CRL4) complex. Despite expressing c-Myc at high levels, Cul4b-deficient CD8+ T cells do not expand and clear the Armstrong strain of lymphocytic choriomeningitis virus (LCMV) in vivo. Cul4b-deficient CD8+ T cells accrue DNA damage and succumb to proliferative catastrophe early after antigen encounter. Mechanistically, Cul4b knockout induces an accumulation of p21 and Cyclin E2, resulting in replication stress. Our data show that c-Myc supports cell proliferation by maintaining genome stability via Cul4b, thereby directly coupling these two interdependent pathways. These data clarify how CD8+ T cells use c-Myc and Cul4b to sustain their potential for extraordinary population expansion, longevity and antiviral responses.
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Affiliation(s)
- Asif A Dar
- Division of Protective Immunity, The Children's Hospital of Philadelphia, Philadelphia, PA, USA.
| | - Dale D Kim
- Division of Protective Immunity, The Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Scott M Gordon
- Division of Neonatology, The Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Kathleen Klinzing
- Division of Protective Immunity, The Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Siera Rosen
- Division of Protective Immunity, The Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Ipsita Guha
- Division of Protective Immunity, The Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Nadia Porter
- Division of Protective Immunity, The Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Yohaniz Ortega
- Division of Protective Immunity, The Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Katherine S Forsyth
- Division of Protective Immunity, The Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Jennifer Roof
- Division of Cell Pathology, The Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Hossein Fazelinia
- Division of Cell Pathology, The Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Lynn A Spruce
- Division of Cell Pathology, The Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Laurence C Eisenlohr
- Division of Protective Immunity, The Children's Hospital of Philadelphia, Philadelphia, PA, USA
- Department of Pathology, University of Pennsylvania, Philadelphia, PA, USA
| | - Edward M Behrens
- Division of Rheumatology, The Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Paula M Oliver
- Division of Protective Immunity, The Children's Hospital of Philadelphia, Philadelphia, PA, USA.
- Department of Pathology, University of Pennsylvania, Philadelphia, PA, USA.
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5
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Liu X, Tian F, Cui J, Gong L, Xiang L, Fan B, Liu S, Zhan J, Zhou Y, Jiang B, Wang M, Sun G, Gong Y, Zou Y. CUL4B functions as a tumor suppressor in KRAS-driven lung tumors by inhibiting the recruitment of myeloid-derived suppressor cells. Oncogene 2023; 42:3113-3126. [PMID: 37653114 DOI: 10.1038/s41388-023-02824-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Revised: 08/22/2023] [Accepted: 08/24/2023] [Indexed: 09/02/2023]
Abstract
Lung cancer is the leading cause of cancer-related death worldwide. KRAS mutations are the most common oncogenic alterations found in lung cancer. Unfortunately, treating KRAS-mutant lung adenocarcinoma (ADC) remains a major oncotherapeutic challenge. Here, we used both autochthonous and transplantable KRAS-mutant tumor models to investigate the role of tumor-derived CUL4B in KRAS-driven lung cancers. We showed that knockout or knockdown of CUL4B promotes lung ADC growth and progression in both models. Mechanistically, CUL4B directly binds to the promoter of Cxcl2 and epigenetically represses its transcription. CUL4B deletion increases the expression of CXCL2, which binds to CXCR2 on myeloid-derived suppressor cells (MDSCs) and promotes their migration to the tumor microenvironment. Targeting of MDSCs significantly delayed the growth of CUL4B knockdown KRAS-mutant tumors. Collectively, our study provides mechanistic insights into the novel tumor suppressor-like functions of CUL4B in regulating KRAS-driven lung tumor development.
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Affiliation(s)
- Xiaochen Liu
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China
- Department of Clinical Laboratory, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Fei Tian
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China
| | - Jianfeng Cui
- Department of Urology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Li Gong
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China
| | - Lu Xiang
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China
| | - Bowen Fan
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China
| | - Shuangteng Liu
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China
| | - Jiafeng Zhan
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China
| | - Yadi Zhou
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China
| | - Baichun Jiang
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China
| | - Molin Wang
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China
| | - Gongping Sun
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China
| | - Yaoqin Gong
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China.
| | - Yongxin Zou
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China.
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6
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Qin L, Song Y, Zhang F, Wang R, Zhou L, Jin S, Chen C, Li C, Wang M, Jiang B, Sun G, Ma C, Gong Y, Li P. CRL4B complex-mediated H2AK119 monoubiquitination restrains Th1 and Th2 cell differentiation. Cell Death Differ 2023; 30:1488-1502. [PMID: 37024604 PMCID: PMC10244459 DOI: 10.1038/s41418-023-01155-8] [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: 09/25/2022] [Revised: 03/18/2023] [Accepted: 03/22/2023] [Indexed: 04/08/2023] Open
Abstract
CD4+ T helper (Th) cell differentiation is regulated by lineage-specific expression of transcription factors, which is tightly associated with epigenetic modifications, including histone acetylation and methylation. However, the factors regulating histone modifications involved in Th cell differentiation remain largely unknown. We herein demonstrated a critical role of Cullin 4B (CUL4B) in restricting Th1 and Th2 cell differentiation. CUL4B, which is assembled into the CUL4B-RING E3 ligase (CRL4B) complex, participates in various physiological and developmental processes through epigenetic repression of transcription. Depletion of Cul4b in CD4+ T cells enhanced Th1 and Th2 cell differentiation. In vivo, an aggravated Th2 response caused by the absence of CUL4B was observed in a murine asthma model. Mechanistically, the CRL4B complex promoted monoubiquitination at H2AK119 (H2AK119ub1) and polycomb repressive complex 2 (PRC2)-mediated trimethylation at H3K27 (H3K27me3) at Tbx21 and Maf and consequently repressed their expression during Th cell differentiation. Our study suggests that CRL4B complex-mediated H2AK119ub1 deposition functions to prevent the aberrant expression of Th1 and Th2 lineage-specific genes.
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Affiliation(s)
- Liping Qin
- Key Laboratory of Experimental Teratology, Ministry of Education, Department of Molecular Medicine and Genetics, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, 250012, Shandong, China
| | - Yu Song
- Key Laboratory of Experimental Teratology, Ministry of Education, Department of Molecular Medicine and Genetics, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, 250012, Shandong, China
| | - Fan Zhang
- Key Laboratory of Experimental Teratology, Ministry of Education, Department of Molecular Medicine and Genetics, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, 250012, Shandong, China
| | - Ru Wang
- Key Laboratory of Experimental Teratology, Ministry of Education, Department of Molecular Medicine and Genetics, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, 250012, Shandong, China
| | - Li Zhou
- Key Laboratory of Experimental Teratology, Ministry of Education, Department of Molecular Medicine and Genetics, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, 250012, Shandong, China
| | - Shiqi Jin
- Key Laboratory of Experimental Teratology, Ministry of Education, Department of Molecular Medicine and Genetics, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, 250012, Shandong, China
| | - Chaojia Chen
- Key Laboratory of Experimental Teratology, Ministry of Education, Department of Immunology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, 250012, Shandong, China
| | - Chunyang Li
- Key Laboratory of Experimental Teratology, Ministry of Education, Department of Histology and Embryology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, 250012, Shandong, China
| | - Molin Wang
- Key Laboratory of Experimental Teratology, Ministry of Education, Department of Molecular Medicine and Genetics, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, 250012, Shandong, China
| | - Baichun Jiang
- Key Laboratory of Experimental Teratology, Ministry of Education, Department of Molecular Medicine and Genetics, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, 250012, Shandong, China
| | - Gongping Sun
- Key Laboratory of Experimental Teratology, Ministry of Education, Department of Histology and Embryology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, 250012, Shandong, China
| | - Chunhong Ma
- Key Laboratory of Experimental Teratology, Ministry of Education, Department of Immunology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, 250012, Shandong, China
| | - Yaoqin Gong
- Key Laboratory of Experimental Teratology, Ministry of Education, Department of Molecular Medicine and Genetics, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, 250012, Shandong, China.
| | - Peishan Li
- Key Laboratory of Experimental Teratology, Ministry of Education, Department of Molecular Medicine and Genetics, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, 250012, Shandong, China.
- State Key Laboratory of Radiation Medicine and Protection, Institutes for Translational Medicine, Suzhou Medical College, Soochow University, Suzhou, 215123, Jiangsu, China.
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7
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Lin CY, Huang KY, Kao SH, Lin MS, Lin CC, Yang SC, Chung WC, Chang YH, Chein RJ, Yang PC. Small-molecule PIK-93 modulates the tumor microenvironment to improve immune checkpoint blockade response. SCIENCE ADVANCES 2023; 9:eade9944. [PMID: 37027467 PMCID: PMC10081850 DOI: 10.1126/sciadv.ade9944] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Accepted: 03/08/2023] [Indexed: 06/19/2023]
Abstract
Immune checkpoint inhibitors (ICIs) targeting PD-L1 immunotherapy are state-of-the-art treatments for advanced non-small cell lung cancer (NSCLC). However, the treatment response of certain patients with NSCLC is unsatisfactory because of an unfavorable tumor microenvironment (TME) and poor permeability of antibody-based ICIs. In this study, we aimed to discover small-molecule drugs that can modulate the TME to enhance ICI treatment efficacy in NSCLC in vitro and in vivo. We identified a PD-L1 protein-modulating small molecule, PIK-93, using a cell-based global protein stability (GPS) screening system. PIK-93 mediated PD-L1 ubiquitination by enhancing the PD-L1-Cullin-4A interaction. PIK-93 reduced PD-L1 levels on M1 macrophages and enhanced M1 antitumor cytotoxicity. Combined PIK-93 and anti-PD-L1 antibody treatment enhanced T cell activation, inhibited tumor growth, and increased tumor-infiltrating lymphocyte (TIL) recruitment in syngeneic and human peripheral blood mononuclear cell (PBMC) line-derived xenograft mouse models. PIK-93 facilitates a treatment-favorable TME when combined with anti-PD-L1 antibodies, thereby enhancing PD-1/PD-L1 blockade cancer immunotherapy.
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Affiliation(s)
- Chia-Yi Lin
- Department of Internal Medicine, College of Medicine, National Taiwan University, Taipei 100, Taiwan
- Institute of Biomedical Sciences, Academia Sinica, Nankang, Taipei 115, Taiwan
| | - Kuo-Yen Huang
- Department of Clinical Laboratory Sciences and Medical Biotechnology, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Shih-Han Kao
- Resuscitation Science Center of Emphasis, Department of Anesthesiology and Critical Care Medicine, The Children’s Hospital of Philadelphia, Philadelphia, PA 19104, USA
| | - Ming-Shiu Lin
- Department of Internal Medicine, College of Medicine, National Taiwan University, Taipei 100, Taiwan
- Institute of Biomedical Sciences, Academia Sinica, Nankang, Taipei 115, Taiwan
| | - Chih-Chien Lin
- Department of Internal Medicine, College of Medicine, National Taiwan University, Taipei 100, Taiwan
- Institute of Biomedical Sciences, Academia Sinica, Nankang, Taipei 115, Taiwan
| | - Shuenn-Chen Yang
- Institute of Biomedical Sciences, Academia Sinica, Nankang, Taipei 115, Taiwan
| | - Wei-Chia Chung
- Department of Internal Medicine, College of Medicine, National Taiwan University, Taipei 100, Taiwan
- Institute of Biomedical Sciences, Academia Sinica, Nankang, Taipei 115, Taiwan
| | - Ya-Hsuan Chang
- Institute of Statistical Science, Academia Sinica, Taipei, Taiwan
| | - Rong-Jie Chein
- Institute of Chemistry, Academia Sinica, Nankang, Taipei 115, Taiwan
| | - Pan-Chyr Yang
- Department of Internal Medicine, College of Medicine, National Taiwan University, Taipei 100, Taiwan
- Institute of Biomedical Sciences, Academia Sinica, Nankang, Taipei 115, Taiwan
- Genomics Research Center, Academia Sinica, Nankang, Taipei 115, Taiwan
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8
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Sampson C, Wang Q, Otkur W, Zhao H, Lu Y, Liu X, Piao H. The roles of E3 ubiquitin ligases in cancer progression and targeted therapy. Clin Transl Med 2023; 13:e1204. [PMID: 36881608 PMCID: PMC9991012 DOI: 10.1002/ctm2.1204] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Revised: 02/07/2023] [Accepted: 02/13/2023] [Indexed: 03/08/2023] Open
Abstract
Ubiquitination is one of the most important post-translational modifications which plays a significant role in conserving the homeostasis of cellular proteins. In the ubiquitination process, ubiquitin is conjugated to target protein substrates for degradation, translocation or activation, dysregulation of which is linked to several diseases including various types of cancers. E3 ubiquitin ligases are regarded as the most influential ubiquitin enzyme owing to their ability to select, bind and recruit target substrates for ubiquitination. In particular, E3 ligases are pivotal in the cancer hallmarks pathways where they serve as tumour promoters or suppressors. The specificity of E3 ligases coupled with their implication in cancer hallmarks engendered the development of compounds that specifically target E3 ligases for cancer therapy. In this review, we highlight the role of E3 ligases in cancer hallmarks such as sustained proliferation via cell cycle progression, immune evasion and tumour promoting inflammation, and in the evasion of apoptosis. In addition, we summarise the application and the role of small compounds that target E3 ligases for cancer treatment along with the significance of targeting E3 ligases as potential cancer therapy.
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Affiliation(s)
- Chibuzo Sampson
- CAS Key Laboratory of Separation Science for Analytical ChemistryDalian Institute of Chemical PhysicsChinese Academy of SciencesDalianChina
- University of Chinese Academy of SciencesBeijingChina
| | - Qiuping Wang
- CAS Key Laboratory of Separation Science for Analytical ChemistryDalian Institute of Chemical PhysicsChinese Academy of SciencesDalianChina
| | - Wuxiyar Otkur
- CAS Key Laboratory of Separation Science for Analytical ChemistryDalian Institute of Chemical PhysicsChinese Academy of SciencesDalianChina
| | - Haifeng Zhao
- Department of OrthopedicsDalian Second People's HospitalDalianChina
| | - Yun Lu
- CAS Key Laboratory of Separation Science for Analytical ChemistryDalian Institute of Chemical PhysicsChinese Academy of SciencesDalianChina
- Department of StomatologyDalian Medical UniversityDalianChina
| | - Xiaolong Liu
- CAS Key Laboratory of Separation Science for Analytical ChemistryDalian Institute of Chemical PhysicsChinese Academy of SciencesDalianChina
| | - Hai‐long Piao
- CAS Key Laboratory of Separation Science for Analytical ChemistryDalian Institute of Chemical PhysicsChinese Academy of SciencesDalianChina
- University of Chinese Academy of SciencesBeijingChina
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9
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Huang G, Jiang Z, Zhu W, Wu Z. Exosomal circKDM4A Induces CUL4B to Promote Prostate Cancer Cell Malignancy in a miR-338-3p-Dependent Manner. Biochem Genet 2023; 61:390-409. [PMID: 35930171 DOI: 10.1007/s10528-022-10251-2] [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: 04/19/2022] [Accepted: 06/22/2022] [Indexed: 01/24/2023]
Abstract
Circular RNA lysine demethylase 4A (circKDM4A) is also named circ_0012098 and its abnormal expression has been confirmed in serum exosomes of prostate cancer (PC) patients. However, whether PC progression involves the exosomal circ_0012098 remains unknown. RNA expression of circKDM4A, microRNA-338-3p (miR-338-3p) and cullin 4B (CUL4B) was detected by quantitative real-time polymerase chain reaction. Protein expression was checked by Western blot. The positive expression rate of nuclear proliferation marker (ki-67) was analyzed by immunohistochemistry assay. Dual-luciferase reporter assay and RNA immunoprecipitation assay were used to identify the interaction between miR-338-3p and circKDM4A or CUL4B. Mouse model assay was performed to determine the effect of exosomal circKDM4A on tumorigenesis in vivo. CircKDM4A expression was significantly upregulated in the serum exosomes from PC patients compared with the exosomes from healthy volunteers. Exosomes treatment promoted the proliferation, migration and invasion of PC cells but inhibited apoptosis; however, these effects were attenuated after circKDM4A knockdown. Meanwhile, circKDM4A depletion restored exosome-increased circKDM4A expression. Additionally, circKDM4A acted as a miR-338-3p sponge, and miR-338-3p bound to CUL4B in PC cells. CircKDM4A regulated the effect of exosome-induced PC cell malignancy by interacting with miR-338-3p and CUL4B. Moreover, circKDM4A silencing relieved exosome-induced tumor growth in vivo. Exosomal circKDM4A promoted PC malignant progression by the miR-338-3p/CUL4B axis, providing a therapeutic target for PC.
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Affiliation(s)
- Guangyi Huang
- Department of Urology Surgery, the Fourth Affiliated Hospital Zhejiang University School of Medicine, Shangcheng Dadao, Yiwu City, 322001, Zhejiang Province, China.
| | - Zeping Jiang
- Department of Urology Surgery, the Fourth Affiliated Hospital Zhejiang University School of Medicine, Shangcheng Dadao, Yiwu City, 322001, Zhejiang Province, China
| | - Wuan Zhu
- Department of Urology Surgery, the Fourth Affiliated Hospital Zhejiang University School of Medicine, Shangcheng Dadao, Yiwu City, 322001, Zhejiang Province, China
| | - Zhiyue Wu
- Department of Urology Surgery, the Fourth Affiliated Hospital Zhejiang University School of Medicine, Shangcheng Dadao, Yiwu City, 322001, Zhejiang Province, China
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10
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Luo JW, Wang CM, Su JW, Yi TZ, Tang SH. CUL4B increases platinum-based drug resistance in colorectal cancer through EMT: A study in its mechanism. J Cell Mol Med 2022; 26:5767-5778. [PMID: 36385733 PMCID: PMC9716322 DOI: 10.1111/jcmm.17585] [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: 04/13/2022] [Revised: 09/08/2022] [Accepted: 09/20/2022] [Indexed: 11/18/2022] Open
Abstract
Platinum-based chemotherapy drugs play a very important role in the treatment of patients with advanced colorectal cancer, but the drug resistance of platinum-based chemotherapy drugs is an important topic that puzzles us. If we can find mechanisms of resistance, it will be revolutionary for us. We analysed the differential genes, core genes and their enrichment pathways in platinum-resistant and non-resistant patients through a public database. Platinum-resistant cell lines were cultured in vitro for in vitro colony and Transwell analysis. Tumorigenesis analysis of nude mice in vivo. Verify the function of core genes. Through differential gene and enrichment analysis, we found that CUL4B was the main factor affecting platinum drug resistance and EMT. Our hypothesis was further verified by in vitro drug-resistant and wild-type cell lines and in vivo tumorigenesis analysis of nude mice. CUL4B leads to platinum drug resistance in colorectal cancer by affecting tumour EMT.
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Affiliation(s)
- Jian-Wu Luo
- Department of Gastroenterology, The First Affiliated Hospital, Jinan University, Guangzhou, China.,Guangxi Huiren Medical Technology Co., Ltd, Nanning, China
| | - Chun-Ming Wang
- Department of General Surgery, The Second Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Jian-Wei Su
- Gastrointestinal Medicine, Affiliated Hospital of YouJiang Medical University For Nationalities, Baise, China
| | - Ting-Zhuang Yi
- Department of Oncology, Affiliated Hospital of YouJiang Medical University For Nationalities, Baise, China
| | - Shao-Hui Tang
- Department of Gastroenterology, The First Affiliated Hospital, Jinan University, Guangzhou, China
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11
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Zhang X, Yang Y, Li D, Wu Z, Liu H, Zhao Z, Zhu H, Xie F, Li X. MOF negatively regulates estrogen receptor α signaling via CUL4B-mediated protein degradation in breast cancer. Front Oncol 2022; 12:868866. [PMID: 36212422 PMCID: PMC9539768 DOI: 10.3389/fonc.2022.868866] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Accepted: 09/05/2022] [Indexed: 11/29/2022] Open
Abstract
Estrogen receptor α (ERα) is the dominant tumorigenesis driver in breast cancer (BC), and ERα-positive BC (ERα+ BC) accounts for more than two-thirds of BC cases. MOF (males absent on the first) is a highly conserved histone acetyltransferase that acetylates lysine 16 of histone H4 (H4K16) and several non-histone proteins. Unbalanced expression of MOF has been identified, and high MOF expression predicted a favorable prognosis in BC. However, the association of MOF with ERα and the regulatory mechanisms of MOF in ERα signaling remain elusive. Our study revealed that the expression of MOF is negatively correlated with that of ERα in BC. In ERα+ BC cells, MOF overexpression downregulated the protein abundance of ERα in both cytoplasm and nucleus, thus attenuating ERα-mediated transactivation as well as cellular proliferation and in vivo tumorigenicity of BC cells. MOF promoted ERα protein degradation through CUL4B-mediated ubiquitin–proteasome pathway and induced HSP90 hyperacetylation that led to the loss of chaperone protection of HSP90 to ERα. We also revealed that suppression of MOF restored ERα expression and increased the sensitivity of ERα-negative BC cells to tamoxifen treatment. These results provide a new insight into the tumor-suppressive role of MOF in BC via negatively regulating ERα action, suggesting that MOF might be a potential therapeutic target for BC.
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Affiliation(s)
- Xu Zhang
- Shandong Provincial Key Laboratory of Animal Cells and Developmental Biology, School of Life Sciences, Shandong University, Qingdao, China
| | - Yang Yang
- School of Pharmacy, Binzhou Medical University, Yantai, China
| | - Danyang Li
- Shandong Provincial Key Laboratory of Animal Cells and Developmental Biology, School of Life Sciences, Shandong University, Qingdao, China
- Rehabilitation Center, Qilu Hospital, Cheelo College of Medicine, Shandong University, Jinan, China
| | - Zhen Wu
- Shandong Provincial Key Laboratory of Animal Cells and Developmental Biology, School of Life Sciences, Shandong University, Qingdao, China
| | - Haoyu Liu
- Shandong Provincial Key Laboratory of Animal Cells and Developmental Biology, School of Life Sciences, Shandong University, Qingdao, China
| | - Ziyan Zhao
- Shandong Provincial Key Laboratory of Animal Cells and Developmental Biology, School of Life Sciences, Shandong University, Qingdao, China
| | - Hongying Zhu
- Shandong Provincial Key Laboratory of Animal Cells and Developmental Biology, School of Life Sciences, Shandong University, Qingdao, China
| | - Fei Xie
- Shandong Provincial Key Laboratory of Animal Cells and Developmental Biology, School of Life Sciences, Shandong University, Qingdao, China
| | - Xiangzhi Li
- Shandong Provincial Key Laboratory of Animal Cells and Developmental Biology, School of Life Sciences, Shandong University, Qingdao, China
- *Correspondence: Xiangzhi Li,
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12
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Fan Y, Huo X, Guo B, Zhang X, Yang Y, Lian J, Meng X, Shao Y, Zou Y, Guo H, Wang H, Sun G, Dou H, Wang J, Shao C, Gong Y, Hu H. Cullin 4b-RING ubiquitin ligase targets IRGM1 to regulate Wnt signaling and intestinal homeostasis. Cell Death Differ 2022; 29:1673-1688. [PMID: 35197566 PMCID: PMC9433385 DOI: 10.1038/s41418-022-00954-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 02/03/2022] [Accepted: 02/07/2022] [Indexed: 11/10/2022] Open
Abstract
Hierarchical organization of intestine relies on the self-renewal and tightly regulated differentiation of intestinal stem cells (ISCs). Although signals like Wnt are known to sustain the continued intestinal renewal by maintaining ISCs activity and lineage commitment, molecular mechanisms underlying ISCs ‘stemness’ and supportive niche have not been well understood. Here, we found that CUL4B-RING ubiquitin ligase (CRL4B) regulates intestinal homeostasis by targeting immunity-related GTPase family M member 1 (IRGM1) for proteasomal degradation. CUL4B was mainly expressed at ISCs zone. Deletion of Cul4b led to reduced self-renewal of ISCs and a decreased lineage differentiation towards secretory progenitors through downregulated Wnt signals. Besides, Cul4b-null mice exhibited impaired Paneth cells number and structure. Mechanistically, CRL4B complex were associated with WD40 proteins and targeted IRGM1 at K270 for ubiquitination and proteosomal degradation. Impaired intestinal function caused by CUL4B deletion was rescued by down-regulation of its substrate IRGM1. Our results identified CUL4B as a novel regulator of ISCs and revealed a new 26 S proteasome degradation mechanism in intestine self-renewal and lineage commitment. ![]()
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13
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Mi J, Wang S, Liu P, Liu C, Zhuang D, Leng X, Zhang Q, Bai F, Feng Q, Wu X. CUL4B Upregulates RUNX2 to Promote the Osteogenic Differentiation of Human Periodontal Ligament Stem Cells by Epigenetically Repressing the Expression of miR-320c and miR-372/373-3p. Front Cell Dev Biol 2022; 10:921663. [PMID: 35784474 PMCID: PMC9243338 DOI: 10.3389/fcell.2022.921663] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2022] [Accepted: 05/26/2022] [Indexed: 12/03/2022] Open
Abstract
Mesenchymal stem cells (MSCs) within the periodontal ligament (PDL), termed periodontal ligament stem cells (PDLSCs), have a self-renewing capability and a multidirectional differentiation potential. The molecular mechanisms that regulate multidirectional differentiation, such as the osteogenic differentiation of PDLSCs, remain to be elucidated. Cullin 4B (CUL4B), which assembles the CUL4B-RING ubiquitin ligase (CRL4B) complex, is involved in regulating a variety of developmental and physiological processes including the skeletal development and stemness of cancer stem cells. However, nothing is known about the possible role of CUL4B in the osteogenic differentiation of PDLSCs. Here, we found that knockdown of CUL4B decreased the proliferation, migration, stemness and osteogenic differentiation ability of PDLSCs. Mechanistically, we demonstrate that CUL4B cooperates with the PRC2 complex to repress the expression of miR-320c and miR-372/373-3p, which results in the upregulation of RUNX2, a master transcription factor (TF) that regulates osteogenic differentiation. In brief, the present study reveals the role of CUL4B as a new regulator of osteogenic differentiation in PDLSCs.
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Affiliation(s)
- Jun Mi
- Department of Tissue Engineering and Regeneration, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University and Shandong Key Laboratory of Oral Tissue Regeneration and, Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, China
- Shenzhen Research Institute of Shandong University, Shenzhen, China
- *Correspondence: Jun Mi, ; Xunwei Wu,
| | - Shuangshuang Wang
- Department of Tissue Engineering and Regeneration, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University and Shandong Key Laboratory of Oral Tissue Regeneration and, Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, China
| | - Panpan Liu
- Department of Tissue Engineering and Regeneration, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University and Shandong Key Laboratory of Oral Tissue Regeneration and, Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, China
- Department of Pediatrics Dentistry, Department of Preventive Dentistry, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University and Shandong Key Laboratory of Oral Tissue Regeneration and, Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, China
| | - Chang Liu
- Department of Tissue Engineering and Regeneration, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University and Shandong Key Laboratory of Oral Tissue Regeneration and, Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, China
| | - Dexuan Zhuang
- Department of Tissue Engineering and Regeneration, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University and Shandong Key Laboratory of Oral Tissue Regeneration and, Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, China
| | - Xue Leng
- Department of Tissue Engineering and Regeneration, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University and Shandong Key Laboratory of Oral Tissue Regeneration and, Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, China
| | - Qun Zhang
- Department of Tissue Engineering and Regeneration, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University and Shandong Key Laboratory of Oral Tissue Regeneration and, Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, China
| | - Fuxiang Bai
- Department of Tissue Engineering and Regeneration, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University and Shandong Key Laboratory of Oral Tissue Regeneration and, Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, China
| | - Qiang Feng
- Department of Human Microbiome, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University and Shandong Key Laboratory of Oral Tissue Regeneration and, Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, China
| | - Xunwei Wu
- Department of Tissue Engineering and Regeneration, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University and Shandong Key Laboratory of Oral Tissue Regeneration and, Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, China
- Engineering Laboratory for Biomaterials and Tissue Regeneration, Ningbo Stomatology Hospital, Savaid Stomatology School, Hangzhou Medical College, Ningbo, China
- Suzhou Research Institute, Shandong University, Suzhou, China
- *Correspondence: Jun Mi, ; Xunwei Wu,
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14
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Huang XT, Zheng Y, Long G, Peng WT, Wan QQ. Insulin alleviates LPS-induced ARDS via inhibiting CUL4B-mediated proteasomal degradation and restoring expression level of Na,K-ATPase α1 subunit through elevating HCF-1. Biochem Biophys Res Commun 2022; 611:60-67. [PMID: 35477094 DOI: 10.1016/j.bbrc.2022.04.044] [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: 03/25/2022] [Revised: 04/09/2022] [Accepted: 04/10/2022] [Indexed: 11/24/2022]
Abstract
Acute respiratory distress syndrome (ARDS) is a critical disease with a high mortality rate, characterized by obstinate hypoxemia caused by accumulation of alveolar fluid and excessive uncontrolled inflammation. Na,K-ATPase α1 (ATP1A1) subunit is an important component of Na,K-ATPase that transports Na+ and K+ and scavenges alveolar fluid. The function of Na,K-ATPase is always impaired during ARDS and results in more severe symptoms of ARDS. However, the regulatory mechanism of Na,K-ATPase after ARDS remains unclear. Here, we revealed ATP1A1 was downregulated post-transcriptionally by an E3 ligase component CUL4B mediated proteasomal degradation. Moreover, we found insulin could inhibit the upregulation of CUL4B in an insulin receptor cofactor HCF-1-dependent manner. Our study resolved the molecular mechanism underlying the clearance impairment of alveolar fluid and provided a clue for the usage of insulin as a potential therapeutic medicine for ARDS.
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Affiliation(s)
- Xue-Ting Huang
- Department of Transplant Surgery, The Third Xiangya Hospital, Central South University, Changsha, 410013, China
| | - Yu Zheng
- Department of Transplant Surgery, The Third Xiangya Hospital, Central South University, Changsha, 410013, China
| | - Guo Long
- Department of Medical Intensive Care Unit, The Third Xiangya Hospital, Central South University, Changsha, 410013, China
| | - Wei-Ting Peng
- Xiangya School of Medicine, Central South University, Changsha, 410013, China
| | - Qi-Quan Wan
- Department of Transplant Surgery, The Third Xiangya Hospital, Central South University, Changsha, 410013, China.
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15
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Liu HT, Zou YX, Zhu WJ, Sen-Liu, Zhang GH, Ma RR, Guo XY, Gao P. lncRNA THAP7-AS1, transcriptionally activated by SP1 and post-transcriptionally stabilized by METTL3-mediated m6A modification, exerts oncogenic properties by improving CUL4B entry into the nucleus. Cell Death Differ 2022; 29:627-641. [PMID: 34608273 PMCID: PMC8901790 DOI: 10.1038/s41418-021-00879-9] [Citation(s) in RCA: 90] [Impact Index Per Article: 45.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Revised: 09/18/2021] [Accepted: 09/20/2021] [Indexed: 11/09/2022] Open
Abstract
Long noncoding RNAs (lncRNAs) are dysregulated in different cancer types, and thus have emerged as important regulators of the initiation and progression of human cancers. However, the biological functions and the underlying mechanisms responsible for their functions in gastric cancer (GC) remain poorly understood. Here, by lncRNA microarray, we identified 1414 differentially expressed lncRNAs, among which THAP7-AS1 was significantly upregulated in GC tissues compared with non-tumorous gastric tissues. High expression of THAP7-AS1 was correlated with positive lymph node metastasis and poorer prognosis. SP1, a transcription factor, could bind directly to the THAP7-AS1 promoter region and activate its transcription. Moreover, the m6A modification of THAP7-AS1 by METTL3 enhanced its expression depending on the "reader" protein IGF2BP1-dependent pathway. THAP7-AS1 promoted GC cell progression. Mechanistically, THAP7-AS1 interacted with the 1-50 Amino Acid Region (nuclear localization signal) of CUL4B through its 1-442 nt Sequence, and it promoted interaction between nuclear localization signal (NLS) and importin α1, and improved the CUL4B protein entry into the nucleus, repressing miR-22-3p and miR-320a expression by CUL4B-catalyzed H2AK119ub1 and the EZH2-mediated H3K27me3, subsequently activating PI3K/AKT signaling pathway to promote GC progression. Moreover, LV-sh-THAP7-AS1 treatment could suppress GC growth, invasion and metastasis, indicating that THAP7-AS1 may act as a promising molecular target for GC therapies. Taken together, our results show that THAP7-AS1, transcriptionally activated by SP1 and then modified by METTL3-mediated m6A, exerts oncogenic functions, by promoting interaction between NLS and importin α1 and then improving the CUL4B protein entry into the nucleus to repress the transcription of miR-22-3p and miR-320a.
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Affiliation(s)
- Hai-Ting Liu
- Key Laboratory for Experimental Teratology of the Ministry of Education and Department of Pathology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, P.R. China
- Department of Pathology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, P.R. China
| | - Yong-Xin Zou
- Key Laboratory for Experimental Teratology of the Ministry of Education and Department of Pathology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, P.R. China
| | - Wen-Jie Zhu
- Key Laboratory for Experimental Teratology of the Ministry of Education and Department of Pathology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, P.R. China
| | - Sen-Liu
- Key Laboratory for Experimental Teratology of the Ministry of Education and Department of Pathology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, P.R. China
| | - Guo-Hao Zhang
- Key Laboratory for Experimental Teratology of the Ministry of Education and Department of Pathology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, P.R. China
| | - Ran-Ran Ma
- Key Laboratory for Experimental Teratology of the Ministry of Education and Department of Pathology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, P.R. China
| | - Xiang-Yu Guo
- Key Laboratory for Experimental Teratology of the Ministry of Education and Department of Pathology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, P.R. China
| | - Peng Gao
- Key Laboratory for Experimental Teratology of the Ministry of Education and Department of Pathology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, P.R. China.
- Department of Pathology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, P.R. China.
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16
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Chaikovsky AC, Sage J, Pagano M, Simoneschi D. The Long-Lost Ligase: CRL4 AMBRA1 Regulates the Stability of D-Type Cyclins. DNA Cell Biol 2021; 40:1457-1461. [PMID: 34495753 PMCID: PMC8742259 DOI: 10.1089/dna.2021.0659] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
D-type cyclins (cyclin D1, D2, and D3, together cyclin D) are central drivers of the cell division cycle and well-described proto-oncoproteins. Rapid turnover of cyclin D is critical for its regulation, but the underlying mechanism has remained a matter of debate. Recently, AMBRA1 was identified as the major regulator of the stability of all three D-type cyclins. AMBRA1 serves as the substrate receptor for one of ∼40 CUL4-RING E3 ubiquitin ligase (CRL4) complexes to mediate the polyubiquitylation and subsequent degradation of cyclin D. Consequently, AMBRA1 regulates cell proliferation to impact tumor growth and the cellular response to cell cycle-targeted cancer therapies. Here we discuss the findings that implicate AMBRA1 as a core member of the cell cycle machinery.
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Affiliation(s)
- Andrea C. Chaikovsky
- Department of Pediatrics and Stanford University, Stanford, California, USA.,Department of Genetics, Stanford University, Stanford, California, USA
| | - Julien Sage
- Department of Pediatrics and Stanford University, Stanford, California, USA.,Department of Genetics, Stanford University, Stanford, California, USA.,Address correspondence to: Julien Sage, PhD, Department of Pediatrics, Stanford University, 265 Campus Drive, Room G2078, Stanford, CA 94305, USA
| | - Michele Pagano
- Department of Biochemistry and Molecular Pharmacology, NYU Grossman School of Medicine, New York, New York, USA.,Laura and Isaac Perlmutter Cancer Center, and NYU Grossman School of Medicine, New York, New York, USA.,Howard Hughes Medical Institute, NYU Grossman School of Medicine, New York, New York, USA
| | - Daniele Simoneschi
- Department of Biochemistry and Molecular Pharmacology, NYU Grossman School of Medicine, New York, New York, USA.,Laura and Isaac Perlmutter Cancer Center, and NYU Grossman School of Medicine, New York, New York, USA
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17
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Wu K, Hopkins BD, Sanchez R, DeVita RJ, Pan ZQ. Targeting Cullin-RING E3 Ubiquitin Ligase 4 by Small Molecule Modulators. JOURNAL OF CELLULAR SIGNALING 2021; 2:195-205. [PMID: 34604860 PMCID: PMC8486283 DOI: 10.33696/signaling.2.051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Cullin-RING E3 ubiquitin ligase 4 (CRL4) plays an essential role in cell cycle progression. Recent efforts using high throughput screening and follow up hit-to-lead studies have led to identification of small molecules 33-11 and KH-4-43 that inhibit E3 CRL4's core ligase complex and exhibit anticancer potential. This review provides: 1) an updated perspective of E3 CRL4, including structural organization, major substrate targets and role in cancer; 2) a discussion of the challenges and strategies for finding the CRL inhibitor; and 3) a summary of the properties of the identified CRL4 inhibitors as well as a perspective on their potential utility to probe CRL4 biology and act as therapeutic agents.
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Affiliation(s)
- Kenneth Wu
- Department of Oncological Sciences, The Icahn School of Medicine at Mount Sinai, One Gustave L. Levy Place, New York, NY 10029-6574, USA
| | - Benjamin D Hopkins
- Department of Oncological Sciences, The Icahn School of Medicine at Mount Sinai, One Gustave L. Levy Place, New York, NY 10029-6574, USA.,Genetics and Genomics, The Icahn School of Medicine at Mount Sinai, One Gustave L. Levy Place, New York, NY 10029-6574, USA
| | - Roberto Sanchez
- Department of Pharmacological Sciences, The Icahn School of Medicine at Mount Sinai, One Gustave L. Levy Place, New York, NY 10029-6574, USA.,Drug Discovery Institute, The Icahn School of Medicine at Mount Sinai, One Gustave L. Levy Place, New York, NY 10029-6574, USA
| | - Robert J DeVita
- Department of Pharmacological Sciences, The Icahn School of Medicine at Mount Sinai, One Gustave L. Levy Place, New York, NY 10029-6574, USA.,Drug Discovery Institute, The Icahn School of Medicine at Mount Sinai, One Gustave L. Levy Place, New York, NY 10029-6574, USA
| | - Zhen-Qiang Pan
- Department of Oncological Sciences, The Icahn School of Medicine at Mount Sinai, One Gustave L. Levy Place, New York, NY 10029-6574, USA
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18
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Porosk L, Põhako K, Arukuusk P, Langel Ü. Cell-Penetrating Peptides Predicted From CASC3, AKIP1, and AHRR Proteins. Front Pharmacol 2021; 12:716226. [PMID: 34504427 PMCID: PMC8421526 DOI: 10.3389/fphar.2021.716226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Accepted: 07/26/2021] [Indexed: 11/13/2022] Open
Abstract
Peptides can be used as research tools and for diagnostic or therapeutic applications. Peptides, alongside small molecules and antibodies, are used and are gaining further interest as protein-protein interaction (PPI) modulators. Peptides have high target specificity and high affinity, but, unlike small molecule modulators, they are not able to cross the cell membranes to reach their intracellular targets. To overcome this limitation, the special property of the cell-penetrating peptides (CPPs) could benefit their cause. CPPs are a class of peptides that can enter the cells and with them also deliver the attached cargoes. Today, with the advancement of in silico prediction tools and the availability of protein databases, designing new and multifunctional peptides that are able to reach intracellular targets and inhibit certain cellular processes in a very specific manner is reachable. Although there are several efficient CPP sequences already known, the discovery of new CPPs is crucial for the development of efficient delivery methods for both biotechnological and therapeutic applications. In this work, we chose 10 human nuclear proteins from which we predicted new potential CPP sequences by using three different CPP predictors: cell-penetrating peptide prediction tool, CellPPD, and SkipCPP-Pred. From each protein, one predicted CPP sequence was synthesized and its internalization into cells was assessed. Out of the tested sequences, three peptides displayed features characteristic to CPPs. These peptides and also the predicted peptide sequences could be used to design and modify new CPPs. In this work, we show that we can use protein sequences as input for generating new peptides with cell internalization properties. Three new CPPs, AHRR8-24, CASC3251-264, and AKIP127-37, can be further used for the delivery of other cargoes or designed into multifunctional peptides with capability of internalizing cells.
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Affiliation(s)
- Ly Porosk
- Institute of Technology, University of Tartu, Tartu, Estonia
| | - Kaisa Põhako
- Institute of Technology, University of Tartu, Tartu, Estonia
| | - Piret Arukuusk
- Institute of Technology, University of Tartu, Tartu, Estonia
| | - Ülo Langel
- Institute of Technology, University of Tartu, Tartu, Estonia.,Department of Biochemistry and Biophysics, Stockholm University, Stockholm, Sweden
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19
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Wang Y, Yan F, Nasar A, Chen ZS, Altorki NK, Stiles B, Narula N, Zhou P. CUL4 high Lung Adenocarcinomas Are Dependent on the CUL4-p21 Ubiquitin Signaling for Proliferation and Survival. THE AMERICAN JOURNAL OF PATHOLOGY 2021; 191:1638-1650. [PMID: 34119472 PMCID: PMC8420861 DOI: 10.1016/j.ajpath.2021.05.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Revised: 05/16/2021] [Accepted: 05/21/2021] [Indexed: 11/20/2022]
Abstract
Cullin (CUL) 4A and 4B ubiquitin ligases are often highly accumulated in human malignant neoplasms and are believed to possess oncogenic properties. However, the underlying mechanisms by which CUL4A and CUL4B promote pulmonary tumorigenesis remain largely elusive. This study reports that CUL4A and CUL4B are highly expressed in patients with non-small cell lung cancer (NSCLC), and their high expression is associated with disease progression, chemotherapy resistance, and poor survival in adenocarcinomas. Depletion of CUL4A (CUL4Ak/d) or CUL4B (CUL4Bk/d) leads to cell cycle arrest at G1 and loss of proliferation and viability of NSCLC cells in culture and in a lung cancer xenograft model, suggesting that CUL4A and 4B are oncoproteins required for tumor maintenance of certain NSCLCs. Mechanistically, increased accumulation of the cell cycle-dependent kinase inhibitor p21/Cip1/WAF1 was observed in lung cancer cells on CUL4 silencing. Knockdown of p21 rescued the G1 arrest of CUL4Ak/d or CUL4Bk/d NSCLC cells, and allowed proliferation to resume. These findings reveal that p21 is the primary downstream effector of lung adenocarcinoma dependence on CUL4, highlight the notion that not all substrates respond equally to abrogation of the CUL4 ubiquitin ligase in NSCLCs, and imply that CUL4Ahigh/CUL4Bhigh may serve as a prognostic marker and therapeutic target for patients with NSCLC.
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Affiliation(s)
- Yannan Wang
- Department of Pathology and Laboratory Medicine, The Joan and Stanford I. Weill Medical College of Cornell University, New York, New York
| | - Fan Yan
- Department of Pathology and Laboratory Medicine, The Joan and Stanford I. Weill Medical College of Cornell University, New York, New York
| | - Abu Nasar
- Division of Thoracic Surgery, Department of Cardiothoracic Surgery, Weill Cornell Medicine - New York Presbyterian Hospital, New York, New York
| | - Zhe-Sheng Chen
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, St John's University, Queens, New York
| | - Nasser Khaled Altorki
- Division of Thoracic Surgery, Department of Cardiothoracic Surgery, Weill Cornell Medicine - New York Presbyterian Hospital, New York, New York
| | - Brendon Stiles
- Division of Thoracic Surgery, Department of Cardiothoracic Surgery, Weill Cornell Medicine - New York Presbyterian Hospital, New York, New York
| | - Navneet Narula
- Department of Pathology and Laboratory Medicine, The Joan and Stanford I. Weill Medical College of Cornell University, New York, New York
| | - Pengbo Zhou
- Department of Pathology and Laboratory Medicine, The Joan and Stanford I. Weill Medical College of Cornell University, New York, New York.
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20
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Abstract
Cullin-RING (really intersting new gene) E3 ubiquitin ligases (CRLs) are the largest E3 family and direct numerous protein substrates for proteasomal degradation, thereby impacting a myriad of physiological and pathological processes including cancer. To date, there are no reported small-molecule inhibitors of the catalytic activity of CRLs. Here, we describe high-throughput screening and medicinal chemistry optimization efforts that led to the identification of two compounds, 33-11 and KH-4-43, which inhibit E3 CRL4 and exhibit antitumor potential. These compounds bind to CRL4's core catalytic complex, inhibit CRL4-mediated ubiquitination, and cause stabilization of CRL4's substrate CDT1 in cells. Treatment with 33-11 or KH-4-43 in a panel of 36 tumor cell lines revealed cytotoxicity. The antitumor activity was validated by the ability of the compounds to suppress the growth of human tumor xenografts in mice. Mechanistically, the compounds' cytotoxicity was linked to aberrant accumulation of CDT1 that is known to trigger apoptosis. Moreover, a subset of tumor cells was found to express cullin4 proteins at levels as much as 70-fold lower than those in other tumor lines. The low-cullin4-expressing tumor cells appeared to exhibit increased sensitivity to 33-11/KH-4-43, raising a provocative hypothesis for the role of low E3 abundance as a cancer vulnerability.
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21
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Shan H, Wang B, Zhang X, Song H, Li X, Zou Y, Jiang B, Hu H, Dou H, Shao C, Gao L, Ma C, Yang X, Liang X, Gong Y. CUL4B facilitates HBV replication by promoting HBx stabilization. Cancer Biol Med 2021; 19:j.issn.2095-3941.2020.0468. [PMID: 33969670 PMCID: PMC8763003 DOI: 10.20892/j.issn.2095-3941.2020.0468] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Accepted: 12/24/2020] [Indexed: 11/11/2022] Open
Abstract
OBJECTIVE Hepatitis B virus (HBV) infection is a major public health problem worldwide. However, the regulatory mechanisms underlying HBV replication remain unclear. Cullin 4B-RING ubiquitin E3 ligase (CRL4B) is involved in regulating diverse physiological and pathophysiological processes. In our study, we aimed to explain the role of CUL4B in HBV infection. METHODS Cul4b transgenic mice or conditional knockout mice, as well as liver cell lines with CUL4B overexpression or knockdown, were used to assess the role of CUL4B in HBV replication. Immunoprecipitation assays and immunofluorescence staining were performed to study the interaction between CUL4B and HBx. Cycloheximide chase assays and in vivo ubiquitination assays were performed to evaluate the half-life and the ubiquitination status of HBx. RESULTS The hydrodynamics-based hepatitis B model in Cul4b transgenic or conditional knockout mice indicated that CUL4B promoted HBV replication (P < 0.05). Moreover, the overexpression or knockdown system in human liver cell lines validated that CUL4B increased HBV replication in an HBx-dependent manner. Importantly, immunoprecipitation assays and immunofluorescence staining showed an interaction between CUL4B and HBx. Furthermore, CUL4B upregulated HBx protein levels by inhibiting HBx ubiquitination and proteasomal degradation (P < 0.05). Finally, a positive correlation between CUL4B expression and HBV pgRNA level was observed in liver tissues from HBV-positive patients and HBV transgenic mice. CONCLUSIONS CUL4B enhances HBV replication by interacting with HBx and disrupting its ubiquitin-dependent proteasomal degradation. CUL4B may therefore be a potential target for anti-HBV therapy.
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Affiliation(s)
- Haixia Shan
- Key Laboratory for Experimental Teratology of the Ministry of Education, Key Laboratory of Infection and Immunity of Shandong Province and Department of Immunology, School of Basic Medical Sciences, Shandong University, Jinan 250012, China
- Department of Laboratory Diagnosis, Cangzhou Combination of Traditional Chinese and Western Medicine Hospital of Hebei Province, Cangzhou 061000, China
| | - Bo Wang
- Key Laboratory for Experimental Teratology of the Ministry of Education, Key Laboratory of Infection and Immunity of Shandong Province and Department of Immunology, School of Basic Medical Sciences, Shandong University, Jinan 250012, China
- Division of Gastroenterology and Hepatology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai Institute of Digestive Disease, Shanghai 200120, China
| | - Xiaodong Zhang
- Key Laboratory for Experimental Teratology of the Ministry of Education, Key Laboratory of Infection and Immunity of Shandong Province and Department of Immunology, School of Basic Medical Sciences, Shandong University, Jinan 250012, China
| | - Hui Song
- Key Laboratory for Experimental Teratology of the Ministry of Education, Key Laboratory of Infection and Immunity of Shandong Province and Department of Immunology, School of Basic Medical Sciences, Shandong University, Jinan 250012, China
| | - Xi Li
- Ministry of Education Key Laboratory of Experimental Teratology and Institute of Molecular Medicine and Genetics, School of Basic Medical Sciences, Shandong University, Jinan 250012, China
| | - Yongxin Zou
- Ministry of Education Key Laboratory of Experimental Teratology and Institute of Molecular Medicine and Genetics, School of Basic Medical Sciences, Shandong University, Jinan 250012, China
| | - Baichun Jiang
- Ministry of Education Key Laboratory of Experimental Teratology and Institute of Molecular Medicine and Genetics, School of Basic Medical Sciences, Shandong University, Jinan 250012, China
| | - Huili Hu
- Ministry of Education Key Laboratory of Experimental Teratology and Institute of Molecular Medicine and Genetics, School of Basic Medical Sciences, Shandong University, Jinan 250012, China
| | - Hao Dou
- Ministry of Education Key Laboratory of Experimental Teratology and Institute of Molecular Medicine and Genetics, School of Basic Medical Sciences, Shandong University, Jinan 250012, China
| | - Changshun Shao
- Ministry of Education Key Laboratory of Experimental Teratology and Institute of Molecular Medicine and Genetics, School of Basic Medical Sciences, Shandong University, Jinan 250012, China
| | - Lifen Gao
- Key Laboratory for Experimental Teratology of the Ministry of Education, Key Laboratory of Infection and Immunity of Shandong Province and Department of Immunology, School of Basic Medical Sciences, Shandong University, Jinan 250012, China
- Collaborative Innovation Center of Technology and Equipment for Biological Diagnosis and Therapy in Universities of Shandong, Jinan 250012, China
| | - Chunhong Ma
- Key Laboratory for Experimental Teratology of the Ministry of Education, Key Laboratory of Infection and Immunity of Shandong Province and Department of Immunology, School of Basic Medical Sciences, Shandong University, Jinan 250012, China
- Collaborative Innovation Center of Technology and Equipment for Biological Diagnosis and Therapy in Universities of Shandong, Jinan 250012, China
| | - Xiaoyun Yang
- Department of Gastroenterology, Qilu Hospital, Shandong University, Jinan 250012, China
| | - Xiaohong Liang
- Key Laboratory for Experimental Teratology of the Ministry of Education, Key Laboratory of Infection and Immunity of Shandong Province and Department of Immunology, School of Basic Medical Sciences, Shandong University, Jinan 250012, China
- Collaborative Innovation Center of Technology and Equipment for Biological Diagnosis and Therapy in Universities of Shandong, Jinan 250012, China
| | - Yaoqin Gong
- Ministry of Education Key Laboratory of Experimental Teratology and Institute of Molecular Medicine and Genetics, School of Basic Medical Sciences, Shandong University, Jinan 250012, China
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22
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Ye X, Liu X, Gao M, Gong L, Tian F, Shen Y, Hu H, Sun G, Zou Y, Gong Y. CUL4B Promotes Temozolomide Resistance in Gliomas by Epigenetically Repressing CDNK1A Transcription. Front Oncol 2021; 11:638802. [PMID: 33869025 PMCID: PMC8050354 DOI: 10.3389/fonc.2021.638802] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Accepted: 03/19/2021] [Indexed: 01/10/2023] Open
Abstract
Resistance to temozolomide (TMZ), the first-line chemotherapeutic drug for glioblastoma (GBM) and anaplastic gliomas, is one of the most significant obstacles in clinical treatment. TMZ resistance is regulated by complex genetic and epigenetic networks. Understanding the mechanisms of TMZ resistance can help to identify novel drug targets and more effective therapies. CUL4B has been shown to be upregulated and promotes progression and chemoresistance in several cancer types. However, its regulatory effect and mechanisms on TMZ resistance have not been elucidated. The aim of this study was to decipher the role and mechanism of CUL4B in TMZ resistance. Western blot and public datasets analysis showed that CUL4B was upregulated in glioma specimens. CUL4B elevation positively correlated with advanced pathological stage, tumor recurrence, malignant molecular subtype and poor survival in glioma patients receiving TMZ treatment. CUL4B expression was correlated with TMZ resistance in GBM cell lines. Knocking down CUL4B restored TMZ sensitivity, while upregulation of CUL4B promoted TMZ resistance in GBM cells. By employing senescence β-galactosidase staining, quantitative reverse transcription PCR and Chromatin immunoprecipitation experiments, we found that CUL4B coordinated histone deacetylase (HDAC) to co-occupy the CDKN1A promoter and epigenetically silenced CDKN1A transcription, leading to attenuation of TMZ-induced senescence and rendering the GBM cells TMZ resistance. Collectively, our findings identify a novel mechanism by which GBM cells develop resistance to TMZ and suggest that CUL4B inhibition may be beneficial for overcoming resistance.
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Affiliation(s)
- Xiang Ye
- Key Laboratory of Experimental Teratology of Ministry of Education, Department of Medical Genetics, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China.,Department of Geriatric Medicine, Qilu Hospital of Shandong University, Jinan, China
| | - Xiaochen Liu
- Key Laboratory of Experimental Teratology of Ministry of Education, Department of Medical Genetics, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Min Gao
- Department of Obstetrics and Gynecology, Qilu Hospital of Shandong University, Jinan, China
| | - Li Gong
- Key Laboratory of Experimental Teratology of Ministry of Education, Department of Medical Genetics, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Fei Tian
- Key Laboratory of Experimental Teratology of Ministry of Education, Department of Medical Genetics, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Yangli Shen
- Key Laboratory of Experimental Teratology of Ministry of Education, Department of Medical Genetics, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Huili Hu
- Key Laboratory of Experimental Teratology of Ministry of Education, Department of Medical Genetics, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Gongping Sun
- Key Laboratory for Experimental Teratology of Ministry of Education, Department of Histoembryology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Yongxin Zou
- Key Laboratory of Experimental Teratology of Ministry of Education, Department of Medical Genetics, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Yaoqin Gong
- Key Laboratory of Experimental Teratology of Ministry of Education, Department of Medical Genetics, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
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23
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Dar AA, Sawada K, Dybas JM, Moser EK, Lewis EL, Park E, Fazelinia H, Spruce LA, Ding H, Seeholzer SH, Oliver PM. The E3 ubiquitin ligase Cul4b promotes CD4+ T cell expansion by aiding the repair of damaged DNA. PLoS Biol 2021; 19:e3001041. [PMID: 33524014 PMCID: PMC7888682 DOI: 10.1371/journal.pbio.3001041] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Revised: 02/17/2021] [Accepted: 01/15/2021] [Indexed: 12/26/2022] Open
Abstract
The capacity for T cells to become activated and clonally expand during pathogen invasion is pivotal for protective immunity. Our understanding of how T cell receptor (TCR) signaling prepares cells for this rapid expansion remains limited. Here we provide evidence that the E3 ubiquitin ligase Cullin-4b (Cul4b) regulates this process. The abundance of total and neddylated Cul4b increased following TCR stimulation. Disruption of Cul4b resulted in impaired proliferation and survival of activated T cells. Additionally, Cul4b-deficient CD4+ T cells accumulated DNA damage. In T cells, Cul4b preferentially associated with the substrate receptor DCAF1, and Cul4b and DCAF1 were found to interact with proteins that promote the sensing or repair of damaged DNA. While Cul4b-deficient CD4+ T cells showed evidence of DNA damage sensing, downstream phosphorylation of SMC1A did not occur. These findings reveal an essential role for Cul4b in promoting the repair of damaged DNA to allow survival and expansion of activated T cells.
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Affiliation(s)
- Asif A. Dar
- Division of Protective Immunity, Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania, United States of America
| | - Keisuke Sawada
- Division of Protective Immunity, Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania, United States of America
| | - Joseph M. Dybas
- Division of Protective Immunity, Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania, United States of America
- Department of Biomedical Health and Informatics, Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania, United States of America
| | - Emily K. Moser
- Division of Protective Immunity, Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania, United States of America
| | - Emma L. Lewis
- Medical Scientist Training Program, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, United States of America
| | - Eddie Park
- Center for Computational and Genomic Medicine, The Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania, United States of America
| | - Hossein Fazelinia
- Division of Cell Pathology, Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania, United States of America
| | - Lynn A. Spruce
- Division of Cell Pathology, Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania, United States of America
| | - Hua Ding
- Division of Cell Pathology, Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania, United States of America
| | - Steven H. Seeholzer
- Division of Cell Pathology, Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania, United States of America
| | - Paula M. Oliver
- Division of Protective Immunity, Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania, United States of America
- Department of Pathology, University of Pennsylvania, Philadelphia, Pennsylvania, United States of America
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24
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Chen S, Wang Y, Chen L, Xia Y, Cui J, Wang W, Jiang X, Wang J, Zhu Y, Sun S, Zou Y, Gong Y, Shi B. CUL4B promotes aggressive phenotypes of renal cell carcinoma via upregulating c-Met expression. Int J Biochem Cell Biol 2020; 130:105887. [PMID: 33227394 DOI: 10.1016/j.biocel.2020.105887] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Revised: 11/10/2020] [Accepted: 11/12/2020] [Indexed: 12/22/2022]
Abstract
Cullin 4B (CUL4B), encoding a scaffold protein in Cullin RING ubiquitin-ligase complexes (CRL4B), is overexpressed and serves as an oncogene in various solid tumors. However, the roles and the underlying mechanisms of CUL4B in renal cell carcinoma (RCC) are still unknown. In this study, we demonstrated that CUL4B was significantly upregulated in RCC cells and clinical specimens, and its overexpression was correlated with poor survival of RCC patients. Knockdown of CUL4B resulted in the inhibition of proliferation, migration and invasion of RCC cells. Furthermore, we found that the expression of CUL4B is positively correlated with c-Met expression in RCC cells and tissues. Konckdown of c-Met or treatment with c-Met inhibitor, SU11274, could block the increase in cell proliferation, migration and invasion induced by CUL4B-overexpression. We also showed that CUL4B overexpression significantly accelerated xenograft tumor growth, and administration of SU11274 could also abrogate the accelerated tumor growth induced by CUL4B overexpression in vivo. These findings shed light on the contribution of CUL4B to tumorigenesis in RCC via activating c-Met signaling and its therapeutic implications in RCC patients.
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Affiliation(s)
- Shouzhen Chen
- Department of Urology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China; The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, Shandong University, School of Basic Medical Sciences, Jinan, Shandong, 250012, China; Key Laboratory of Urinary Precision Diagnosis and Treatment in Universities of Shandong, Jinan, Shandong, 250012, China
| | - Yong Wang
- Department of Urology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China; The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, Shandong University, School of Basic Medical Sciences, Jinan, Shandong, 250012, China; Key Laboratory of Urinary Precision Diagnosis and Treatment in Universities of Shandong, Jinan, Shandong, 250012, China
| | - Lipeng Chen
- Department of Urology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China
| | - Yangyang Xia
- Department of Urology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China
| | - Jianfeng Cui
- Department of Urology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China
| | - Wenfu Wang
- Department of Urology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China
| | - Xuewen Jiang
- Department of Urology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China
| | - Jian Wang
- Department of Urology, The People's Hospital of Laoling City, Dezhou, Shandong, 253600, China
| | - Yaofeng Zhu
- Department of Urology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China
| | - Shuna Sun
- Department of Dermatology, The Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Shandong Provincial Hospital of Traditional Chinese Medicine, Jinan, Shandong, 250011, China
| | - Yongxin Zou
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, Shandong University, School of Basic Medical Sciences, Jinan, Shandong, 250012, China
| | - Yaoqin Gong
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, Shandong University, School of Basic Medical Sciences, Jinan, Shandong, 250012, China.
| | - Benkang Shi
- Department of Urology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China.
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25
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Wang Y, Chen S, Sun S, Liu G, Chen L, Xia Y, Cui J, Wang W, Jiang X, Zhang L, Zhu Y, Zou Y, Shi B. Wogonin Induces Apoptosis and Reverses Sunitinib Resistance of Renal Cell Carcinoma Cells via Inhibiting CDK4-RB Pathway. Front Pharmacol 2020; 11:1152. [PMID: 32792963 PMCID: PMC7394056 DOI: 10.3389/fphar.2020.01152] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Accepted: 07/15/2020] [Indexed: 01/18/2023] Open
Abstract
Wogonin, an active component derived from Scutellaria baicalensis, has shown anti-tumor activities in several malignancies. However, the roles of wogonin in RCC cells remain elusive. Here, we explored the effects of wogonin on RCC cells and the underlying mechanisms. We found that wogonin showed significant cytotoxic effects against RCC cell lines 786-O and OS-RC-2, with much lower cytotoxic effects on human normal embryonic kidney cell line HEK-293 cells. Wogonin treatment dramatically inhibited the proliferation, migration, and invasion of RCC cells. We further showed that by inhibiting CDK4-RB pathway, wogonin transcriptionally down-regulated CDC6, disturbed DNA replication, induced DNA damage and apoptosis in RCC cells. Moreover, we found that the levels of p-RB, CDK4, and Cyclin D1 were up-regulated in sunitinib resistant 786-O, OS-RC-2, and TK-10 cells, and inhibition of CDK4 by palbociclib or wogonin effectively reversed the sunitinib resistance, indicating that the hyperactivation of CDK4-RB pathway may at least partially contribute to the resistance of RCC to sunitinib. Together, our findings demonstrate that wogonin could induce apoptosis and reverse sunitinib resistance of RCC cells via inhibiting CDK4-RB pathway, thus suggesting a potential therapeutic implication in the future management of RCC patients.
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Affiliation(s)
- Yong Wang
- Department of Urology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China.,The Key Laboratory of Experimental Teratology of Ministry of Education, Department of Medical Genetics, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China.,Key Laboratory of Urinary Precision Diagnosis and Treatment in Universities of Shandong, Jinan, China
| | - Shouzhen Chen
- Department of Urology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China.,Key Laboratory of Urinary Precision Diagnosis and Treatment in Universities of Shandong, Jinan, China
| | - Shuna Sun
- Department of Dermatology, The Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Shandong Provincial Hospital of Traditional Chinese Medicine, Jinan, China
| | - Guangyi Liu
- Department of Nephrology, Qilu Hospital, Shandong University, Jinan, China
| | - Lipeng Chen
- Department of Urology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China.,Key Laboratory of Urinary Precision Diagnosis and Treatment in Universities of Shandong, Jinan, China
| | - Yangyang Xia
- Department of Urology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China.,Key Laboratory of Urinary Precision Diagnosis and Treatment in Universities of Shandong, Jinan, China
| | - Jianfeng Cui
- Department of Urology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China.,Key Laboratory of Urinary Precision Diagnosis and Treatment in Universities of Shandong, Jinan, China
| | - Wenfu Wang
- Department of Urology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China.,Key Laboratory of Urinary Precision Diagnosis and Treatment in Universities of Shandong, Jinan, China
| | - Xuewen Jiang
- Department of Urology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China.,Key Laboratory of Urinary Precision Diagnosis and Treatment in Universities of Shandong, Jinan, China
| | - Lei Zhang
- Department of Immunology and Key Laboratory of Infection and Immunity of Shandong Province, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Yaofeng Zhu
- Department of Urology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Yongxin Zou
- The Key Laboratory of Experimental Teratology of Ministry of Education, Department of Medical Genetics, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Benkang Shi
- Department of Urology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China.,Key Laboratory of Urinary Precision Diagnosis and Treatment in Universities of Shandong, Jinan, China
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Duan PJ, Zhao JH, Xie LL. Cul4B promotes the progression of ovarian cancer by upregulating the expression of CDK2 and CyclinD1. J Ovarian Res 2020; 13:76. [PMID: 32622365 PMCID: PMC7335446 DOI: 10.1186/s13048-020-00677-w] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Accepted: 06/29/2020] [Indexed: 02/07/2023] Open
Abstract
Background Ovarian cancer is one of the most common malignant tumors in the female reproductive system with the highest mortality rate. Cul4B participates in the oncogenesis and progression of several malignant tumors. However, the role of Cul4B in ovarian cancer has not been studied. Results High expression of intratumor Cul4B was associated with poor patient survival. Cul4B expression was associated with FIGO stage and Cul4B was independent risk factor of ovarian cancer disease-free survival and overall survival. In vitro studies revealed that overexpression of Cul4B promoted tumor proliferation while knockdown of Cul4B significantly inhibited the proliferation capacity of ovarian cancer cells. Mechanistically, Cul4B was found to promotes cell entering S phase from G0/G1 phase by regulating the expression of CDK2 and CyclinD1. Cul4B regulates the expression of CDK2 and CyclinD1 by repressing miR-372. Conclusions The results revealed that high expression of Cul4B is associated with poor ovarian cancer prognosis and Cul4B may serve as a potential treating target for an adjuvant therapy.
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Affiliation(s)
- Peng-Jing Duan
- Department of Gynaecology and Obstetrics, Affiliated Hospital of Shandong Medical College, 80 Jintan Road, Linyi, 276000, Shandong, China
| | - Juan-Hong Zhao
- Department of Gynaecology and Obstetrics, Affiliated Hospital of Shandong Medical College, 80 Jintan Road, Linyi, 276000, Shandong, China
| | - Li-Li Xie
- Department of Gynaecology, The people's hospital of Linshu, 182 West Shuhe Road, Linshu, 276700, Shandong, China.
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The CUL4B-miR-372/373-PIK3CA-AKT axis regulates metastasis in bladder cancer. Oncogene 2020; 39:3588-3603. [PMID: 32127645 DOI: 10.1038/s41388-020-1236-1] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2019] [Revised: 02/18/2020] [Accepted: 02/19/2020] [Indexed: 12/24/2022]
Abstract
CUL4B, which acts as a scaffold protein in CUL4B-RING ubiquitin ligase (CRL4B) complexes, participates in a variety of biological processes. Previous studies have shown that CUL4B is often overexpressed and exhibits oncogenic activities in a variety of solid tumors. However, the roles and the underlying mechanisms of CUL4B in bladder cancer (BC) were poorly understood. Here, we showed that CUL4B levels were overexpressed and positively correlated with the malignancy of BC, and CUL4B could confer BC cells increased motility, invasiveness, stemness, and chemoresistance. The PIK3CA/AKT pathway was identified as a critical downstream mediator of CUL4B-driven oncogenicity in BC cells. Furthermore, we demonstrated that CRL4B epigenetically repressed the transcription of miR-372/373, via catalyzing monoubiquitination of H2AK119 at the gene cluster encoding miR-372/373, leading to upregulation of PIK3CA and activation of AKT. Our findings thus establish a critical role for the CUL4B-miR-372/373-PIK3CA/AKT axis in the pathogenesis of BC and have important prognostic and therapeutic implications in BC.
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CUL4B contributes to cancer stemness by repressing tumor suppressor miR34a in colorectal cancer. Oncogenesis 2020; 9:20. [PMID: 32054830 PMCID: PMC7018700 DOI: 10.1038/s41389-020-0206-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Revised: 01/29/2020] [Accepted: 01/30/2020] [Indexed: 12/18/2022] Open
Abstract
Given that colorectal cancer stem cells (CCSCs) play key roles in the tumor dormancy, metastasis, and relapse, targeting CCSCs is a promising strategy in cancer therapy. Here, we aimed to identify the new regulators of CCSCs and found that Cullin 4B (CUL4B), which possesses oncogenic properties in multiple solid tumors, drives the development and metastasis of colon cancer by sustaining cancer stem-like features. Elevated expression of CUL4B was confirmed in colon tumors and was associated with poor overall survival. Inhibition of CUL4B in cancer cell lines and patient-derived tumor organoids led to reduced sphere formation, proliferation and metastasis capacity. Mechanistically, CUL4B coordinates with PRC2 complex to repress miR34a expression, thus upregulates oncogenes including MYCN and NOTCH1, which are targeted by miR34a. Furthermore, we found that elevated CUL4B expression is associated with miR34a downregulation and upregulation of miR34a target genes in colon cancer specimens. Collectively, our findings demonstrate that CUL4B functions to repress miR34a in maintaining cancer stemness in CRC and provides a potential therapeutic target.
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29
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Reichermeier KM, Straube R, Reitsma JM, Sweredoski MJ, Rose CM, Moradian A, den Besten W, Hinkle T, Verschueren E, Petzold G, Thomä NH, Wertz IE, Deshaies RJ, Kirkpatrick DS. PIKES Analysis Reveals Response to Degraders and Key Regulatory Mechanisms of the CRL4 Network. Mol Cell 2020; 77:1092-1106.e9. [PMID: 31973889 DOI: 10.1016/j.molcel.2019.12.013] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Revised: 11/18/2019] [Accepted: 12/13/2019] [Indexed: 12/11/2022]
Abstract
Co-opting Cullin4 RING ubiquitin ligases (CRL4s) to inducibly degrade pathogenic proteins is emerging as a promising therapeutic strategy. Despite intense efforts to rationally design degrader molecules that co-opt CRL4s, much about the organization and regulation of these ligases remains elusive. Here, we establish protein interaction kinetics and estimation of stoichiometries (PIKES) analysis, a systematic proteomic profiling platform that integrates cellular engineering, affinity purification, chemical stabilization, and quantitative mass spectrometry to investigate the dynamics of interchangeable multiprotein complexes. Using PIKES, we show that ligase assemblies of Cullin4 with individual substrate receptors differ in abundance by up to 200-fold and that Cand1/2 act as substrate receptor exchange factors. Furthermore, degrader molecules can induce the assembly of their cognate CRL4, and higher expression of the associated substrate receptor enhances degrader potency. Beyond the CRL4 network, we show how PIKES can reveal systems level biochemistry for cellular protein networks important to drug development.
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Affiliation(s)
- Kurt M Reichermeier
- Division of Biology and Biological Engineering, California Institute of Technology, 1200 E California Blvd., Pasadena, CA 91125, USA; Genentech, 1 DNA Way, South San Francisco, 94080 CA, USA.
| | - Ronny Straube
- Max Plank Institute for Dynamics of Complex Technical Systems, Sandtorstr. 1, 39106 Magdeburg, Germany; Bristol-Myers Squibb, 3551 Lawrenceville Princeton Rd, Lawrence Township, NJ 08648, USA
| | - Justin M Reitsma
- Division of Biology and Biological Engineering, California Institute of Technology, 1200 E California Blvd., Pasadena, CA 91125, USA; Abbvie, 1 N Waukegan Rd, North Chicago, IL 60064, USA
| | - Michael J Sweredoski
- Division of Biology and Biological Engineering, California Institute of Technology, 1200 E California Blvd., Pasadena, CA 91125, USA
| | | | - Annie Moradian
- Division of Biology and Biological Engineering, California Institute of Technology, 1200 E California Blvd., Pasadena, CA 91125, USA
| | - Willem den Besten
- Genentech, 1 DNA Way, South San Francisco, 94080 CA, USA; Amgen Research, Amgen, One Amgen Center Drive, 29MB, Thousand Oaks, CA 91320, USA
| | - Trent Hinkle
- Genentech, 1 DNA Way, South San Francisco, 94080 CA, USA
| | | | - Georg Petzold
- Friedrich Miescher Institute for Biomedical Research, Maulbeerstrasse 66, 4058 Basel, Switzerland
| | - Nicolas H Thomä
- Friedrich Miescher Institute for Biomedical Research, Maulbeerstrasse 66, 4058 Basel, Switzerland
| | - Ingrid E Wertz
- Genentech, 1 DNA Way, South San Francisco, 94080 CA, USA
| | - Raymond J Deshaies
- Division of Biology and Biological Engineering, California Institute of Technology, 1200 E California Blvd., Pasadena, CA 91125, USA; Amgen Research, Amgen, One Amgen Center Drive, 29MB, Thousand Oaks, CA 91320, USA
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Song Y, Li P, Qin L, Xu Z, Jiang B, Ma C, Shao C, Gong Y. CUL4B negatively regulates Toll-like receptor-triggered proinflammatory responses by repressing Pten transcription. Cell Mol Immunol 2019; 18:339-349. [PMID: 31729464 DOI: 10.1038/s41423-019-0323-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Accepted: 10/17/2019] [Indexed: 02/06/2023] Open
Abstract
Toll-like receptors (TLRs) play critical roles in innate immunity and inflammation. The molecular mechanisms by which TLR signaling is fine-tuned remain to be completely elucidated. Cullin 4B (CUL4B), which assembles the CUL4B-RING E3 ligase complex (CRL4B), has been shown to regulate diverse developmental and physiological processes by catalyzing monoubiquitination for histone modification or polyubiquitination for proteasomal degradation. Here, we identified the role of CUL4B as an intrinsic negative regulator of the TLR-triggered inflammatory response. Deletion of CUL4B in macrophages increased the production of proinflammatory cytokines and decreased anti-inflammatory cytokine IL-10 production in response to pathogens that activate TLR3, TLR4, or TLR2. Myeloid cell-specific Cul4b knockout mice were more susceptible to septic shock when challenged with lipopolysaccharide, polyinosinic-polycytidylic acid or Salmonella typhimurium infection. We further demonstrated that enhanced TLR-induced inflammatory responses in the absence of CUL4B were mediated by increased GSK3β activity. Suppression of GSK3β activity efficiently blocked the TLR-triggered increase in proinflammatory cytokine production and attenuated TLR-triggered death in Cul4b mutant mice. Mechanistically, CUL4B was found to negatively regulate TLR-triggered signaling by epigenetically repressing the transcription of Pten, thus maintaining the anti-inflammatory PI3K-AKT-GSK3β pathway. The upregulation of PTEN caused by CUL4B deletion led to uncontrolled GSK3β activity and excessive inflammatory immune responses. Thus, our findings indicate that CUL4B functions to restrict TLR-triggered inflammatory responses through regulating the AKT-GSK3β pathway.
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Affiliation(s)
- Yu Song
- Key Laboratory of Experimental Teratology, Ministry of Education, Institute of Molecular Medicine and Genetics, School of Basic Medical Sciences, Shandong University, Jinan, Shandong, China
| | - Peishan Li
- Key Laboratory of Experimental Teratology, Ministry of Education, Institute of Molecular Medicine and Genetics, School of Basic Medical Sciences, Shandong University, Jinan, Shandong, China
| | - Liping Qin
- Key Laboratory of Experimental Teratology, Ministry of Education, Institute of Molecular Medicine and Genetics, School of Basic Medical Sciences, Shandong University, Jinan, Shandong, China
| | - Zhiliang Xu
- Key Laboratory of Experimental Teratology, Ministry of Education, Institute of Molecular Medicine and Genetics, School of Basic Medical Sciences, Shandong University, Jinan, Shandong, China
| | - Baichun Jiang
- Key Laboratory of Experimental Teratology, Ministry of Education, Institute of Molecular Medicine and Genetics, School of Basic Medical Sciences, Shandong University, Jinan, Shandong, China
| | - Chunhong Ma
- Key Laboratory of Experimental Teratology, Ministry of Education, Department of Immunology, School of Basic Medical Science, Shandong University, Jinan, Shandong, China
| | - Changshun Shao
- State Key Laboratory of Radiation Medicine and Protection, Institutes for Translational Medicine, Soochow University, Suzhou, Jiangsu, China
| | - Yaoqin Gong
- Key Laboratory of Experimental Teratology, Ministry of Education, Institute of Molecular Medicine and Genetics, School of Basic Medical Sciences, Shandong University, Jinan, Shandong, China.
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Shiizaki K, Kido K, Mizuta Y. Insight into the relationship between aryl-hydrocarbon receptor and β-catenin in human colon cancer cells. PLoS One 2019; 14:e0224613. [PMID: 31675361 PMCID: PMC6824560 DOI: 10.1371/journal.pone.0224613] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Accepted: 10/17/2019] [Indexed: 12/18/2022] Open
Abstract
β-Catenin is a multi-functional protein involved in cell adhesion and signal transduction and has a critical role in colorectal cancer development. β-Catenin positively regulates the aryl-hydrocarbon receptor (AhR) mediated signal by both induction of AhR expression and enhancement of AhR-dependent gene induction. Conversely, it was reported that AhR negatively regulates the β-catenin signal via ubiquitination and subsequent degradation in a ligand dependent manner. However, there have been conflicting data among previous studies regarding the relationship between these two proteins. In this report, we conducted confirmatory studies dissecting the relationship between AhR and β-catenin. We did not observe β-catenin degradation by AhR ligands in several colon cancer cell lines. Reporter assays revealed that the AhR ligand did not alter TcF/β-catenin dependent transcription. Yeast and mammalian two-hybrid assays failed to reconstruct the interaction of β-catenin and AhR even when other factors, Arnt, CUL4B, and DDB1, were co-expressed additionally. Independently to induction of AhR expression, β-catenin enhanced AhR-dependent transcriptional activation via the xenobiotic response element (XRE). Coimmunoprecipitation detected the formation of a β-catenin and ligand-activated AhR complex, which was thought to reflect the β-catenin mediated enhancement of the AhR signaling. Overall, we could only confirm unidirectional interaction, which is positive regulation of the AhR signal by β-catenin. These results suggested that data from previous reports on the degradation of β-catenin via liganded AhR warrants further investigation to yield clarity in the field.
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Affiliation(s)
- Kazuhiro Shiizaki
- Department of Applied Biosciences, Faculty of Life Sciences, Toyo University, Itakura-machi, Oura-gun, Gunma, Japan
- * E-mail:
| | - Kenta Kido
- Department of Applied Biosciences, Faculty of Life Sciences, Toyo University, Itakura-machi, Oura-gun, Gunma, Japan
| | - Yasuhiro Mizuta
- Department of Applied Biosciences, Faculty of Life Sciences, Toyo University, Itakura-machi, Oura-gun, Gunma, Japan
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Dou H, Duan Y, Zhang X, Yu Q, Di Q, Song Y, Li P, Gong Y. Aryl hydrocarbon receptor (AhR) regulates adipocyte differentiation by assembling CRL4B ubiquitin ligase to target PPARγ for proteasomal degradation. J Biol Chem 2019; 294:18504-18515. [PMID: 31653699 DOI: 10.1074/jbc.ra119.009282] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Revised: 10/16/2019] [Indexed: 12/17/2022] Open
Abstract
Peroxisome proliferator-activated receptor γ (PPARγ) is the central regulator of adipogenesis, and its dysregulation is linked to obesity and metabolic diseases. Identification of the factors that regulate PPARγ expression and activity is therefore crucial for combating obesity. Aryl hydrocarbon receptor (AhR) is a ligand-activated transcription factor with a known role in xenobiotic detoxification. Recent studies have suggested that AhR also plays essential roles in energy metabolism. However, the detailed mechanisms remain unclear. We previously reported that experiments with adipocyte-specific Cullin 4b (Cul4b)-knockout mice showed that CUL4B suppresses adipogenesis by targeting PPARγ. Here, using immunoprecipitation, ubiquitination, real-time PCR, and GST-pulldown assays, we report that AhR functions as the substrate receptor in CUL4B-RING E3 ubiquitin ligase (CRL4B) complex and is required for recruiting PPARγ. AhR overexpression reduced PPARγ stability and suppressed adipocyte differentiation, and AhR knockdown stimulated adipocyte differentiation in 3T3-L1 cells. Furthermore, we found that two lysine sites on residues 268 and 293 in PPARγ are targeted for CRL4B-mediated ubiquitination, indicating cross-talk between acetylation and ubiquitination. Our findings establish a critical role of AhR in regulating PPARγ stability and suggest that the AhR-PPARγ interaction may represent a potential therapeutic target for managing metabolic diseases arising from PPARγ dysfunction.
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Affiliation(s)
- Hao Dou
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, School of Basic Medical Sciences, Shandong University, Jinan, Shandong 250012, China
| | - Yuyao Duan
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, School of Basic Medical Sciences, Shandong University, Jinan, Shandong 250012, China
| | - Xiaohui Zhang
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, School of Basic Medical Sciences, Shandong University, Jinan, Shandong 250012, China
| | - Qian Yu
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, School of Basic Medical Sciences, Shandong University, Jinan, Shandong 250012, China
| | - Qian Di
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, School of Basic Medical Sciences, Shandong University, Jinan, Shandong 250012, China
| | - Yu Song
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, School of Basic Medical Sciences, Shandong University, Jinan, Shandong 250012, China
| | - Peishan Li
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, School of Basic Medical Sciences, Shandong University, Jinan, Shandong 250012, China
| | - Yaoqin Gong
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, School of Basic Medical Sciences, Shandong University, Jinan, Shandong 250012, China.
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Fouad S, Wells OS, Hill MA, D'Angiolella V. Cullin Ring Ubiquitin Ligases (CRLs) in Cancer: Responses to Ionizing Radiation (IR) Treatment. Front Physiol 2019; 10:1144. [PMID: 31632280 PMCID: PMC6781834 DOI: 10.3389/fphys.2019.01144] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2019] [Accepted: 08/22/2019] [Indexed: 12/19/2022] Open
Abstract
Treatment with ionizing radiation (IR) remains the cornerstone of therapy for multiple cancer types, including disseminated and aggressive diseases in the palliative setting. Radiotherapy efficacy could be improved in combination with drugs that regulate the ubiquitin-proteasome system (UPS), many of which are currently being tested in clinical trials. The UPS operates through the covalent attachment of ATP-activated ubiquitin molecules onto substrates following the transfer of ubiquitin from an E1, to an E2, and then to the substrate via an E3 enzyme. The specificity of ubiquitin ligation is dictated by E3 ligases, which select substrates to be ubiquitylated. Among the E3s, cullin ring ubiquitin ligases (CRLs) represent prototypical multi-subunit E3s, which use the cullin subunit as a central assembling scaffold. CRLs have crucial roles in controlling the cell cycle, hypoxia signaling, reactive oxygen species clearance and DNA repair; pivotal factors regulating the cancer and normal tissue response to IR. Here, we summarize the findings on the involvement of CRLs in the response of cancer cells to IR, and we discuss the therapeutic approaches to target the CRLs which could be exploited in the clinic.
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Affiliation(s)
- Shahd Fouad
- Medical Research Council Institute for Radiation Oncology, Department of Oncology, University of Oxford, Oxford, United Kingdom
| | - Owen S Wells
- Genome Damage and Stability Centre, School of Life Sciences, University of Sussex, Brighton, United Kingdom
| | - Mark A Hill
- Medical Research Council Institute for Radiation Oncology, Department of Oncology, University of Oxford, Oxford, United Kingdom
| | - Vincenzo D'Angiolella
- Medical Research Council Institute for Radiation Oncology, Department of Oncology, University of Oxford, Oxford, United Kingdom
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Liu A, Zhang S, Shen Y, Lei R, Wang Y. Association of mRNA expression levels of Cullin family members with prognosis in breast cancer: An online database analysis. Medicine (Baltimore) 2019; 98:e16625. [PMID: 31374029 PMCID: PMC6709298 DOI: 10.1097/md.0000000000016625] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Cullin proteins couple with RING-finger proteins, adaptor proteins and substrate recognition receptors to form E3 ubiquitin ligases for recognizing numerous substrates and participating in a variety of cellular processes, especially in genome stability and tumorigenesis. However, the prognostic values of Cullins in breast cancer remain elusive.A "Kaplan-Meier plotter" (KM plotter) online survival analysis tool was used to evaluate the association of individual Cullin members' mRNA expression with overall survival (OS) in breast cancer patients.Our results revealed that elevated mRNA expression of CUL4A and PARC were significantly associated with poor OS for breast cancer patients. While high mRNA expression of CUL2, CUL4B, and CUL5 were correlated with better survival for breast cancers.The associated results suggested that some Cullin members could serve as new predictive prognostic indicators for breast cancer.
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Affiliation(s)
- Aiyu Liu
- Department of Anesthesiology, First Affiliated Hospital, Zhejiang University School of Medicine
| | - Shizhen Zhang
- Institute of Translational Medicine, Zhejiang University School of Medicine
| | - Yanwen Shen
- Institute of Translational Medicine, Zhejiang University School of Medicine
| | - Rui Lei
- Department of Plastic Surgery, First Affiliated Hospital, Zhejiang University School of Medicine
| | - Yannan Wang
- Department of Scientific Research, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou, Zhejiang, China
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Zhao M, Qi M, Li X, Hu J, Zhang J, Jiao M, Bai X, Peng X, Han B. CUL4B/miR-33b/C-MYC axis promotes prostate cancer progression. Prostate 2019; 79:480-488. [PMID: 30609075 DOI: 10.1002/pros.23754] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/12/2018] [Accepted: 11/27/2018] [Indexed: 12/19/2022]
Abstract
BACKGROUND Cullin 4B (CUL4B), a scaffold protein that assembles CRL4B ubiquitin ligase complexes, is overexpressed in many types of solid tumors and contributes to epigenetic silencing of tumor suppressors. However, its clinical significance and underlying molecular mechanisms in prostate cancer (PCa) remain unknown. METHODS The clinical significance of CUL4B in PCa was characterized by in silico method. RT-qPCR and Western blot were used to study the transcript and protein expression levels of CUL4B and C-MYC. Bioinformatics tools, chromatin immunoprecipitation (ChIP) and luciferase reporter assay were utilized to identify and characterize the microRNAs (miRNAs) regulated by CUL4B. The biological function of CUL4B and miR-33b-5p was evaluated by MTS, transwell, and wound healing assays, accordingly. RESULTS CUL4B is significantly overexpressed in PCa tissues compared with benign prostatic tissues and its overexpression is correlated with poor prognosis. CUL4B promotes proliferation and aggressiveness of PCa cells in vitro. Mechanistically, we demonstrate that CUL4B upregulates the expression of C-MYC at post-transcriptional level through epigenetic silencing of miR-33b-5p. Importantly, CUL4B-induced oncogenic activity in PCa by targeting C-MYC is repressed by miR-33b-5p. CONCLUSIONS Our results suggested a novel CUL4B/miR-33b/C-MYC axis implicated in PCa cell growth and progression. This might provide novel insight into how CUL4B contributed to PCa aggressiveness and progression.
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Affiliation(s)
- Mingfeng Zhao
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Pathology, Shandong University QiLu Medical College, School of Basic Medical Sciences, Jinan, China
- Department of Pathology, Binzhou Medical University, Binzhou, China
| | - Mei Qi
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Pathology, Shandong University QiLu Medical College, School of Basic Medical Sciences, Jinan, China
| | - Xinjun Li
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Pathology, Shandong University QiLu Medical College, School of Basic Medical Sciences, Jinan, China
- Department of Pathology, Binzhou People's Hospital, Binzhou, China
| | - Jing Hu
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Pathology, Shandong University QiLu Medical College, School of Basic Medical Sciences, Jinan, China
| | - Jing Zhang
- Department of Pharmacy, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, China
| | - Meng Jiao
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Pathology, Shandong University QiLu Medical College, School of Basic Medical Sciences, Jinan, China
| | - Xinnuo Bai
- Department of Public Health Sciences, Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario, Canada
| | - Xijia Peng
- Human Biology Program, University of Toronto, Toronto, Ontario, Canada
| | - Bo Han
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Pathology, Shandong University QiLu Medical College, School of Basic Medical Sciences, Jinan, China
- Department of Pathology, Shandong University QiLu Hospital, Jinan, China
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36
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Sun S, Zhang X, Xu M, Zhang F, Tian F, Cui J, Xia Y, Liang C, Zhou S, Wei H, Zhao H, Wu G, Xu B, Liu X, Yang G, Wang Q, Zhang L, Gong Y, Shao C, Zou Y. Berberine downregulates CDC6 and inhibits proliferation via targeting JAK-STAT3 signaling in keratinocytes. Cell Death Dis 2019; 10:274. [PMID: 30894513 PMCID: PMC6426889 DOI: 10.1038/s41419-019-1510-8] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2018] [Revised: 02/17/2019] [Accepted: 03/07/2019] [Indexed: 12/21/2022]
Abstract
Psoriasis is a chronic skin disease characterized by hyperproliferation and impaired differentiation of epidermal keratinocytes accompanied by increased inflammation, suggesting that molecules with antiproliferation and anti-inflammatory abilities may be effective for its treatment. One of the key steps in regulating cell proliferation is DNA replication initiation, which relies on prereplication complex (pre-RC) assembly on chromatin. CDC6 is an essential regulator of pre-RC assembly and DNA replication in eukaryotic cells, but its role in proliferation of keratinocytes and psoriasis is unknown. Here we examined CDC6 expression in psoriatic skin and evaluated its function in the proliferation of human keratinocytes. CDC6 expression is upregulated in epidermal cells in psoriatic lesions and it could be induced by IL-22/STAT3 signaling, a key signaling pathway involved in the pathogenesis of psoriasis, in keratinocytes. Depletion of CDC6 leads to decreased proliferation of keratinocytes. We also revealed that berberine (BBR) could inhibit CDK4/6-RB-CDC6 signaling in keratinocytes, leading to reduced proliferation of keratinocytes. The mechanism of antiproliferation effects of BBR is through the repression of JAK1, JAK2, and TYK2, which in turn inhibits activation of STAT3. Finally, we demonstrated that BBR could inhibit imiquimod-induced psoriasis-like skin lesions and upregulation of CDC6 and p-STAT3 in mice. Collectively, our findings indicate that BBR inhibits CDC6 expression and proliferation in human keratinocytes by interfering the JAK–STAT3 signaling pathway. Thus, BBR may serve as a potential therapeutic option for patients with psoriasis.
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Affiliation(s)
- Shuna Sun
- Department of Dermatology, The Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Shandong Provincial Hospital of Traditional Chinese Medicine, Jinan, 250011, Shandong, China
| | - Xiaojie Zhang
- Department of Dermatology, The Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Shandong Provincial Hospital of Traditional Chinese Medicine, Jinan, 250011, Shandong, China
| | - Mengru Xu
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, Shandong University, School of Basic Medical Sciences, Jinan, 250012, Shandong, China
| | - Fang Zhang
- Department of Dermatology, The Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Shandong Provincial Hospital of Traditional Chinese Medicine, Jinan, 250011, Shandong, China
| | - Fei Tian
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, Shandong University, School of Basic Medical Sciences, Jinan, 250012, Shandong, China
| | - Jianfeng Cui
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, Shandong University, School of Basic Medical Sciences, Jinan, 250012, Shandong, China.,Department of Urology, Qilu Hospital, Shandong University, Jinan, 250012, Shandong, China
| | - Yangyang Xia
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, Shandong University, School of Basic Medical Sciences, Jinan, 250012, Shandong, China.,Department of Urology, Qilu Hospital, Shandong University, Jinan, 250012, Shandong, China
| | - Chenxi Liang
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, Shandong University, School of Basic Medical Sciences, Jinan, 250012, Shandong, China
| | - Shujie Zhou
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, Shandong University, School of Basic Medical Sciences, Jinan, 250012, Shandong, China
| | - Haifeng Wei
- Department of Dermatology, The Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Shandong Provincial Hospital of Traditional Chinese Medicine, Jinan, 250011, Shandong, China
| | - Hui Zhao
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, Shandong University, School of Basic Medical Sciences, Jinan, 250012, Shandong, China
| | - Guojing Wu
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, Shandong University, School of Basic Medical Sciences, Jinan, 250012, Shandong, China
| | - Bohan Xu
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, Shandong University, School of Basic Medical Sciences, Jinan, 250012, Shandong, China
| | - Xiaochen Liu
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, Shandong University, School of Basic Medical Sciences, Jinan, 250012, Shandong, China
| | - Guanqun Yang
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, Shandong University, School of Basic Medical Sciences, Jinan, 250012, Shandong, China
| | - Qinzhou Wang
- Department of Neurology, Qilu Hospital, Shandong University, Jinan, 250012, Shandong, China
| | - Lei Zhang
- Department of Immunology and Key Laboratory of Infection and Immunity of Shandong Province, Shandong University, School of Basic Medical Sciences, Jinan, 250012, Shandong, China
| | - Yaoqin Gong
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, Shandong University, School of Basic Medical Sciences, Jinan, 250012, Shandong, China
| | - Changshun Shao
- The First Affiliated Hospital of Soochow University and State Key Laboratory of Radiation Medicine and Protection, Institutes for Translational Medicine, Soochow University, Suzhou, 215123, Jiangsu, China
| | - Yongxin Zou
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, Shandong University, School of Basic Medical Sciences, Jinan, 250012, Shandong, China.
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37
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CUL4B promotes prostate cancer progression by forming positive feedback loop with SOX4. Oncogenesis 2019; 8:23. [PMID: 30872583 PMCID: PMC6418142 DOI: 10.1038/s41389-019-0131-5] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Revised: 02/06/2019] [Accepted: 02/27/2019] [Indexed: 02/07/2023] Open
Abstract
How to distinguish indolent from aggressive disease remains a great challenge in prostate cancer (PCa) management. Cullin 4B (CUL4B) is a scaffold protein and exhibits oncogenic activity in a variety of human malignancies. In this study, we utilized PCa tissue specimens, cell lines and xenograft models to determine whether CUL4B contributes to PCa progression and metastasis. Here, we show that CUL4B expression highly correlates with the aggressiveness of PCa. CUL4B expression promotes proliferation, epithelial−mesenchymal transition, and metastatic potential of PCa cells, whereas CUL4B knockdown inhibits. Mechanically, CUL4B positively regulates SOX4, a key regulator in PCa, through epigenetic silencing of miR-204. In turn, SOX4 upregulates CUL4B expression through transcriptional activation, thereby fulfilling a positive feedback loop. Clinically, CUL4B+/SOX4+ defines a subset of PCa patients with poor prognosis. Bioinformatics analysis further reveals that Wnt/ß-catenin activation signature is enriched in CUL4B+/SOX4+ patient subgroup. Intriguingly, Wnt inhibitors significantly attenuates oncogenic capacities of CUL4B in vitro and in vivo. Together, our study identifies CUL4B as a key modulator of aggressive PCa by a positive feedback loop that interacts with SOX4. This regulatory circuit may have a crucial role in PCa progression.
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38
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Li Y, Zhou X, Zhang Y, Yang J, Xu Y, Zhao Y, Wang X. CUL4B regulates autophagy via JNK signaling in diffuse large B-cell lymphoma. Cell Cycle 2019; 18:379-394. [PMID: 30612524 DOI: 10.1080/15384101.2018.1560718] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Aberrant expression of CUL4B was identified in various types of solid cancers. Cumulative evidences support the oncogenic role of CUL4B in cancers, including regulation of cell proliferation and signal transduction. However, its clinical value and potential pathogenic mechanism in diffuse large B-cell lymphoma (DLBCL) have not been described previously. Therefore, we hypothesize that overexpressed CUL4B may contribute to the pathogenesis of DLBCL. The aim of this study is to assess the expression and the biological function of CUL4B in DLBCL progression. In our study, CUL4B overexpression was observed in DLBCL tissues, and its upregulation was closely associated with poor prognosis in patients. Furthermore, the functional roles of CUL4B was detected both in vitro and in vivo. We demonstrated that silencing CUL4B could not only induce cell proliferation inhibition, cell cycle arrest, and motility attenuation of DLBCL cells in vitro, but also decrease tumor growth in DLBCL xenografts mice. In addition, we identified that CUL4B may act as a potent inductor of JNK phosphorylation in regulation of autophagy. Our findings demonstrated a significant role of CUL4B in the development and progression of DLBCL. CUL4B may act as a useful biomarker and a novel therapeutic target in DLBCL.
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Affiliation(s)
- Ying Li
- a Department of Hematology , Shandong Provincial Hospital Affiliated to Shandong University , Jinan , Shandong , People's Republic of China
| | - Xiangxiang Zhou
- a Department of Hematology , Shandong Provincial Hospital Affiliated to Shandong University , Jinan , Shandong , People's Republic of China
| | - Ya Zhang
- a Department of Hematology , Shandong Provincial Hospital Affiliated to Shandong University , Jinan , Shandong , People's Republic of China
| | - Juan Yang
- a Department of Hematology , Shandong Provincial Hospital Affiliated to Shandong University , Jinan , Shandong , People's Republic of China
| | - Yangyang Xu
- a Department of Hematology , Shandong Provincial Hospital Affiliated to Shandong University , Jinan , Shandong , People's Republic of China
| | - Yi Zhao
- a Department of Hematology , Shandong Provincial Hospital Affiliated to Shandong University , Jinan , Shandong , People's Republic of China
| | - Xin Wang
- a Department of Hematology , Shandong Provincial Hospital Affiliated to Shandong University , Jinan , Shandong , People's Republic of China.,b School of Medicine , Shandong University , Jinan , Shandong , People's Republic of China
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39
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Sun H, Zhang J, Xin S, Jiang M, Zhang J, Li Z, Cao Q, Lou H. Cul4-Ddb1 ubiquitin ligases facilitate DNA replication-coupled sister chromatid cohesion through regulation of cohesin acetyltransferase Esco2. PLoS Genet 2019; 15:e1007685. [PMID: 30779731 PMCID: PMC6396947 DOI: 10.1371/journal.pgen.1007685] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Revised: 03/01/2019] [Accepted: 01/16/2019] [Indexed: 12/30/2022] Open
Abstract
Cohesin acetyltransferases ESCO1 and ESCO2 play a vital role in establishing sister chromatid cohesion. How ESCO1 and ESCO2 are controlled in a DNA replication-coupled manner remains unclear in higher eukaryotes. Here we show a critical role of CUL4-RING ligases (CRL4s) in cohesion establishment via regulating ESCO2 in human cells. Depletion of CUL4A, CUL4B or DDB1 subunits substantially reduces the normal cohesion efficiency. We also show that MMS22L, a vertebrate ortholog of yeast Mms22, is one of DDB1 and CUL4-associated factors (DCAFs) involved in cohesion. Several lines of evidence show selective interaction of CRL4s with ESCO2 through LxG motif, which is lost in ESCO1. Depletion of either CRL4s or ESCO2 causes a defect in SMC3 acetylation, which can be rescued by HDAC8 inhibition. More importantly, both CRL4s and PCNA act as mediators for efficiently stabilizing ESCO2 on chromatin and catalyzing SMC3 acetylation. Taken together, we propose an evolutionarily conserved mechanism in which CRL4s and PCNA promote ESCO2-dependent establishment of sister chromatid cohesion.
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Affiliation(s)
- Haitao Sun
- Beijing Advanced Innovation Center for Food Nutrition and Human Health and State Key Laboratory of Agro-Biotechnology, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Jiaxin Zhang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health and State Key Laboratory of Agro-Biotechnology, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Siyu Xin
- Beijing Advanced Innovation Center for Food Nutrition and Human Health and State Key Laboratory of Agro-Biotechnology, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Meiqian Jiang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health and State Key Laboratory of Agro-Biotechnology, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Jingjing Zhang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health and State Key Laboratory of Agro-Biotechnology, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Zhen Li
- Beijing Advanced Innovation Center for Food Nutrition and Human Health and State Key Laboratory of Agro-Biotechnology, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Qinhong Cao
- Beijing Advanced Innovation Center for Food Nutrition and Human Health and State Key Laboratory of Agro-Biotechnology, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Huiqiang Lou
- Beijing Advanced Innovation Center for Food Nutrition and Human Health and State Key Laboratory of Agro-Biotechnology, College of Biological Sciences, China Agricultural University, Beijing, China
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40
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Patrón LA, Nagatomo K, Eves DT, Imad M, Young K, Torvund M, Guo X, Rogers GC, Zinsmaier KE. Cul4 ubiquitin ligase cofactor DCAF12 promotes neurotransmitter release and homeostatic plasticity. J Cell Biol 2019; 218:993-1010. [PMID: 30670470 PMCID: PMC6400570 DOI: 10.1083/jcb.201805099] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Revised: 11/13/2018] [Accepted: 12/20/2018] [Indexed: 12/20/2022] Open
Abstract
Patrón et al. show that presynaptic Drosophila DCAF12 is required for neurotransmitter release and homeostatic synaptic plasticity at neuromuscular junctions. Postsynaptic nuclear DCAF12 controls the expression of glutamate receptor IIA subunits in cooperation with Cullin4 ubiquitin ligase. We genetically characterized the synaptic role of the Drosophila homologue of human DCAF12, a putative cofactor of Cullin4 (Cul4) ubiquitin ligase complexes. Deletion of Drosophila DCAF12 impairs larval locomotion and arrests development. At larval neuromuscular junctions (NMJs), DCAF12 is expressed presynaptically in synaptic boutons, axons, and nuclei of motor neurons. Postsynaptically, DCAF12 is expressed in muscle nuclei and facilitates Cul4-dependent ubiquitination. Genetic experiments identified several mechanistically independent functions of DCAF12 at larval NMJs. First, presynaptic DCAF12 promotes evoked neurotransmitter release. Second, postsynaptic DCAF12 negatively controls the synaptic levels of the glutamate receptor subunits GluRIIA, GluRIIC, and GluRIID. The down-regulation of synaptic GluRIIA subunits by nuclear DCAF12 requires Cul4. Third, presynaptic DCAF12 is required for the expression of synaptic homeostatic potentiation. We suggest that DCAF12 and Cul4 are critical for normal synaptic function and plasticity at larval NMJs.
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Affiliation(s)
- Lilian A Patrón
- Department of Neuroscience, University of Arizona, Tucson, AZ.,Graduate Interdisciplinary Program in Neuroscience, University of Arizona, Tucson, AZ
| | - Kei Nagatomo
- Department of Neuroscience, University of Arizona, Tucson, AZ
| | | | - Mays Imad
- Department of Neuroscience, University of Arizona, Tucson, AZ
| | - Kimberly Young
- Department of Neuroscience, University of Arizona, Tucson, AZ
| | - Meaghan Torvund
- Department of Neuroscience, University of Arizona, Tucson, AZ.,Graduate Interdisciplinary Program in Neuroscience, University of Arizona, Tucson, AZ
| | - Xiufang Guo
- Department of Neuroscience, University of Arizona, Tucson, AZ
| | - Gregory C Rogers
- Department of Molecular and Cellular Biology, University of Arizona, Tucson, AZ.,Department of Cellular and Molecular Medicine, University of Arizona, Tucson, AZ
| | - Konrad E Zinsmaier
- Department of Neuroscience, University of Arizona, Tucson, AZ .,Department of Molecular and Cellular Biology, University of Arizona, Tucson, AZ
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41
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Ashok C, Owais S, Srijyothi L, Selvam M, Ponne S, Baluchamy S. A feedback regulation of CREB activation through the CUL4A and ERK signaling. Med Oncol 2019; 36:20. [PMID: 30666499 DOI: 10.1007/s12032-018-1240-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2018] [Accepted: 12/17/2018] [Indexed: 12/24/2022]
Abstract
CUL4A; an E3 ubiquitin ligase is involved in the degradation of negative regulators of cell cycle such as p21, p27, p53, etc., through polyubiquitination-mediated protein degradation. The functional role(s) of CUL4A proteins on their targets are well characterized; however, the transcriptional regulation of CUL4A, particularly at its promoter level is not yet studied. Therefore, in this study, using computational tools, we found cAMP responsive elements (CRE) at the locations of - 926 and - 764 with respect to transcription state site + 1 of CUL4A promoter. Hence, we investigated the role of CREB on the regulation of CUL4A transcription. Our chromatin immunoprecipitation (ChIP) data clearly showed increased levels of promoter occupancy of both CREB and pCREB on both CREs of CUL4A promoter. As expected, the expression of CUL4A increases and decreases upon the overexpression of and knocking down of CREB, respectively. Moreover, the inhibition of ERK pathway by U0126 not only reduces the CREB activation but also the CUL4A levels suggesting that CREB is the upstream activator of CUL4A transcription. The reduction of CUL4A levels upon the knocking down of CREB or by U0126 treatment increases the protein levels of CUL4A substrates such as p21 and p27. It is reported that CUL4A activates the ERK1/2 transcription and ERK1/2 pathway activates the CREB by phosphorylation. Based on our data and earlier findings, we report that CREB regulates the CUL4A levels positively which in turn activates the CREB through ERK1/2 pathway in the form of auto-regulatory looped mechanism.This suggests that CUL4A might be involved in proliferation of cancer cells by regulating the ERK1/2 and CREB signaling.
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Affiliation(s)
- Cheemala Ashok
- Department of Biotechnology, Pondicherry Central University, Pondicherry, 605014, India
| | - Sheikh Owais
- Department of Biotechnology, Pondicherry Central University, Pondicherry, 605014, India
| | - Loudu Srijyothi
- Department of Biotechnology, Pondicherry Central University, Pondicherry, 605014, India
| | - Murugan Selvam
- Department of Biotechnology, Pondicherry Central University, Pondicherry, 605014, India
| | - Saravanaraman Ponne
- Department of Biotechnology, Pondicherry Central University, Pondicherry, 605014, India
| | - Sudhakar Baluchamy
- Department of Biotechnology, Pondicherry Central University, Pondicherry, 605014, India.
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42
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Aihara Y, Fujimura-Kamada K, Yamasaki T, Minagawa J. Algal photoprotection is regulated by the E3 ligase CUL4-DDB1 DET1. NATURE PLANTS 2019; 5:34-40. [PMID: 30598533 DOI: 10.1038/s41477-018-0332-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Accepted: 11/19/2018] [Indexed: 05/25/2023]
Abstract
Light is essential for photosynthesis, but the amounts of light that exceed an organism's assimilation capacity can cause serious damage1. Photosynthetic organisms minimize such potential harm through protection mechanisms collectively referred to as non-photochemical quenching2. One mechanism of non-photochemical quenching called energy-dependent quenching (qE quenching) is readily activated under high-light conditions and dissipates excess energy as heat. LIGHT-HARVESTING COMPLEX STRESS-RELATED PROTEINS 1 and 3 (LHCSR1 and LHCSR3) have been proposed to mediate qE quenching in the green alga Chlamydomonas reinhardtii when grown under high-light conditions3. LHCSR3 induction requires a blue-light photoreceptor, PHOTOTROPIN (PHOT)4, although the signal transduction pathway between PHOT and LHCSR3 is not yet clear. Here, we identify two phot suppressor loci involved in qE quenching: de-etiolated 1 (det1)5 and damaged DNA-binding 1 (ddb1)6. Using a yeast two-hybrid analysis and an inhibitor assay, we determined that these two genetic elements are part of a protein complex containing CULLIN 4 (CUL4). These findings suggest a photoprotective role for the putative E3 ubiquitin ligase CUL4-DDB1DET1 in unicellular photosynthetic organisms that may mediate blue-light signals to LHCSR1 and LHCSR3 gene expression.
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Affiliation(s)
- Yusuke Aihara
- Division of Environmental Photobiology, National Institute for Basic Biology, Okazaki, Japan
- Division of Biological Science, Graduate School of Science, Nagoya University, Nagoya, Japan
| | - Konomi Fujimura-Kamada
- Division of Environmental Photobiology, National Institute for Basic Biology, Okazaki, Japan
| | - Tomohito Yamasaki
- Division of Environmental Photobiology, National Institute for Basic Biology, Okazaki, Japan
- Science Department, Natural Science Cluster, Kochi University, Kochi, Japan
| | - Jun Minagawa
- Division of Environmental Photobiology, National Institute for Basic Biology, Okazaki, Japan.
- Department of Basic Biology, School of Life Science, Graduate University for Advanced Studies, Okazaki, Japan.
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43
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Cheng J, Guo J, North BJ, Tao K, Zhou P, Wei W. The emerging role for Cullin 4 family of E3 ligases in tumorigenesis. Biochim Biophys Acta Rev Cancer 2018; 1871:138-159. [PMID: 30602127 DOI: 10.1016/j.bbcan.2018.11.007] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2018] [Revised: 11/28/2018] [Accepted: 11/29/2018] [Indexed: 02/06/2023]
Abstract
As a member of the Cullin-RING ligase family, Cullin-RING ligase 4 (CRL4) has drawn much attention due to its broad regulatory roles under physiological and pathological conditions, especially in neoplastic events. Based on evidence from knockout and transgenic mouse models, human clinical data, and biochemical interactions, we summarize the distinct roles of the CRL4 E3 ligase complexes in tumorigenesis, which appears to be tissue- and context-dependent. Notably, targeting CRL4 has recently emerged as a noval anti-cancer strategy, including thalidomide and its derivatives that bind to the substrate recognition receptor cereblon (CRBN), and anticancer sulfonamides that target DCAF15 to suppress the neoplastic proliferation of multiple myeloma and colorectal cancers, respectively. To this end, PROTACs have been developed as a group of engineered bi-functional chemical glues that induce the ubiquitination-mediated degradation of substrates via recruiting E3 ligases, such as CRL4 (CRBN) and CRL2 (pVHL). We summarize the recent major advances in the CRL4 research field towards understanding its involvement in tumorigenesis and further discuss its clinical implications. The anti-tumor effects using the PROTAC approach to target the degradation of undruggable targets are also highlighted.
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Affiliation(s)
- Ji Cheng
- Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China; Department of Pathology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA
| | - Jianping Guo
- Department of Pathology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA
| | - Brian J North
- Department of Pathology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA
| | - Kaixiong Tao
- Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Pengbo Zhou
- Department of Pathology and Laboratory Medicine, Weill Cornell Medicine, 1300 York Ave., New York, NY 10065, USA.
| | - Wenyi Wei
- Department of Pathology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA.
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44
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He F, Cheng XM, Gu WL. Effects of cullin 4B on the proliferation and invasion of human gastric cancer cells. Mol Med Rep 2018; 17:4973-4980. [PMID: 29393470 PMCID: PMC5865957 DOI: 10.3892/mmr.2018.8509] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Accepted: 12/12/2017] [Indexed: 02/07/2023] Open
Abstract
The major aim of the present study was to explore the effects of cullin 4B (CUL4B) on the proliferation and invasion of human gastric cancer cells. Gastric tumor tissues and paired adjacent non-tumor tissues were obtained from 21 gastric cancer patients, and gastric cancer cell lines (AGS, MGC-803, KATO-III, MKN-45, SGC-7901, BGC-823 and MKN-74) were cultured. BGC-823 cells were transfected with CUL4B small interfering (si)RNA or control siRNA. Reverse transcription-quantitative polymerase chain reaction analysis was performed to detect the mRNA expression of CUL4B. Western blot analysis was performed to measure the protein levels of Wnt, β-catenin, glutathione synthase kinase (GSK)-3β, caspase-3 and cyclin E. MTT and Transwell assays were performed to examine cell proliferation and invasion following CUL4B knockdown. In addition, the effect of CUL4B knockdown on the cell cycle and apoptosis of BGC-823 cells was evaluated by flow cytometric analysis. The results indicated that compared with the adjacent non-tumor tissues and a normal gastric epithelial cell line, gastric cancer tissues and cell lines exhibited significantly higher expression of CUL4B. Knockdown of CUL4B in gastric cancer cells suppressed cell proliferation, caused G1 arrest and inhibited cell invasion. Silencing of CUL4B also resulted in decreased Wnt and β-catenin expression, but increased expression of GSK-3β, caspase-3 and cyclin E. These results indirectly demonstrate that CUL4B enhances the proliferation and invasion abilities of gastric cancer cells by upregulating the constituent factors Wnt and β-catenin, as well as by negatively regulating the mRNA and protein expression of GSK-3β, caspase-3 and cyclin E. The potential mechanism of CUL4B highlighted in the present study may be helpful for the treatment of patients with gastric cancer.
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Affiliation(s)
- Feng He
- Department of Medical Oncology, The Affiliated Jianhu Hospital of Nantong University, Jianhu People's Hospital, Yancheng, Jiangsu 224700, P.R. China
| | - Xiu-Mei Cheng
- Department of Basic Medicine, Jiangsu Vocational College of Medicine, Yancheng, Jiangsu 224000, P.R. China
| | - Wen-Long Gu
- Department of Medical Oncology, The Affiliated Jianhu Hospital of Nantong University, Jianhu People's Hospital, Yancheng, Jiangsu 224700, P.R. China
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45
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CUL4B promotes gastric cancer invasion and metastasis-involvement of upregulation of HER2. Oncogene 2017; 37:1075-1085. [PMID: 29106389 DOI: 10.1038/onc.2017.380] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2016] [Revised: 09/05/2017] [Accepted: 09/07/2017] [Indexed: 12/13/2022]
Abstract
Cullin 4B (CUL4B) is a scaffold protein overexpressed in several solid malignancies. It is known to silence tumor suppressor through post-transcriptional manner. However, its clinical significance and underlying molecular mechanisms in gastric cancer (GC) remain largely unknown. In this study, we found that CUL4B was significantly overexpressed in GC tissues and its overexpression was correlated with lymph node metastasis and poor prognosis. Through gain- and loss-of-function experiments, we showed that CUL4B promotes GC cell invasion and epithelial-mesenchymal transition (EMT) in vitro, as well as tumor growth and metastasis in vivo. Mechanistically, we identified HER2 as a downstream target gene of CUL4B in GC. CUL4B unregulated HER2 expression via transcriptionally repressing miR-125a. Intriguingly, HER2 inhibitors significantly reversed CUL4B-induced EMT in vitro and partially blocked GC metastasis in tumor xenografts with CUL4B overexpression. Finally, we suggested the involvement of the PI3K/AKT pathway in CUL4B-induced HER2 upregulation in GC. In all, we proposed a model for a CUL4B-miR-125a-HER2 oncoprotein axis, which provided novel insight into how HER2 was activated and contributed to GC progression and metastasis.
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Abstract
Cullin 4B (CUL4B) is a scaffold of the Cullin4B-Ring E3 ligase complex (CRL4B) that plays an important role in proteolysis and is implicated in tumorigenesis. Aberrant expression of CUL4B has been reported in various types of human diseases. Recently, studies have shown that CUL4B was overexpressed in a multitude of solid neoplasms and affect the expression of several tumor suppressor genes. In this review, we aim to summarize the biological function of CUL4B in order to better understand its pathogenesis in human cancers.
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Affiliation(s)
- Ying Li
- Department of Hematology, Shandong Provincial Hospital Affiliated to Shandong University, No.324, Jingwu Road, Jinan, 250021 Shandong People's Republic of China
| | - Xin Wang
- Department of Hematology, Shandong Provincial Hospital Affiliated to Shandong University, No.324, Jingwu Road, Jinan, 250021 Shandong People's Republic of China.,Shandong University School of Medicine, Jinan, 250012 Shandong People's Republic of China
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Li P, Zhang L, Yang M, Qi M, Jin X, Han B. Cul4B is a novel prognostic marker in cholangiocarcinoma. Oncol Lett 2017; 14:1265-1274. [PMID: 28808481 PMCID: PMC5542034 DOI: 10.3892/ol.2017.6297] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2015] [Accepted: 10/27/2016] [Indexed: 12/27/2022] Open
Abstract
Cullin 4B (Cul4B), a scaffold protein that assembles the ubiquitin ligase complex, is involved in a wide variety of physiological and developmental processes, such as cell cycle progression, DNA damage response and gene expression regulation. Cul4B is overexpressed in various solid tumors. However, the prognostic value and role of Cul4B in cholangiocarcinoma (CCA) is largely unknown. The present study demonstrated that Cul4B was overexpressed in 21 (26.6%) of 79 patients with intrahepatic CCA, and in 40 (28.6%) of 140 patients with extrahepatic CCA (EHCC). Kaplan-Meier survival analysis suggested that Cul4B expression is an unfavorable prognostic factor in EHCC patients. Notably, Cul4B and epidermal growth factor receptor expression define a subset of CCA patients with poor prognosis. In vitro data indicated that Cul4B promotes the proliferation, migration and invasion of CCA cells. Furthermore, Cul4B expression promotes the epithelial-mesenchymal transition (EMT) process in CCA cells. Finally, Cul4B repressed the expression of the tumor suppressor genes P16 and phosphatase and tensin homolog. Collectively, the results of the present study revealed an important role of Cul4B in CCA with respect to initiating EMT. Cul4B expression may serve as a prognostic marker for patients with EHCC.
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Affiliation(s)
- Pengyu Li
- Department of Emergency Surgery, Shandong University Qilu Hospital, Jinan, Shandong 250012, P.R. China
| | - Lili Zhang
- Department of Pathology, Shandong University Medical School, Jinan, Shandong 250012, P.R. China
| | - Muyi Yang
- Department of Pathology, Shandong University Medical School, Jinan, Shandong 250012, P.R. China
| | - Mei Qi
- Department of Pathology, Shandong University Medical School, Jinan, Shandong 250012, P.R. China
| | - Xing Jin
- Department of Vascular Surgery, Shandong Provincial Hospital, Jinan, Shandong 250012, P.R. China
| | - Bo Han
- Department of Pathology, Shandong University Medical School, Jinan, Shandong 250012, P.R. China.,Department of Pathology, Shandong University Qilu Hospital, Jinan, Shandong 250012, P.R. China
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Mi J, Zou Y, Lin X, Lu J, Liu X, Zhao H, Ye X, Hu H, Jiang B, Han B, Shao C, Gong Y. Dysregulation of the miR-194-CUL4B negative feedback loop drives tumorigenesis in non-small-cell lung carcinoma. Mol Oncol 2017; 11:305-319. [PMID: 28164432 PMCID: PMC5527444 DOI: 10.1002/1878-0261.12038] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Revised: 12/14/2016] [Accepted: 12/15/2016] [Indexed: 12/13/2022] Open
Abstract
Cullin 4B (CUL4B), a scaffold protein that assembles CRL4B ubiquitin ligase complexes, is overexpressed in many types of cancers and represses many tumor suppressors through epigenetic mechanisms. However, the mechanisms by which CUL4B is upregulated remain to be elucidated. Here, we show that CUL4B is upregulated in non‐small‐cell lung carcinoma (NSCLC) tissues and is critically required for cell proliferation and migration in vitro and for xenograft tumor formation in vivo. We found that microRNA‐194 (miR‐194) and CUL4B protein were inversely correlated in cancer specimens and demonstrated that miR‐194 could downregulate CUL4B by directly targeting its 3′‐UTR. We also showed that CUL4B could be negatively regulated by p53 in a miR‐194‐dependent manner. miR‐194 was further shown to attenuate the malignant phenotype of lung cancer cells by downregulating CUL4B. Interestingly, CRL4B also epigenetically represses miR‐194 by catalyzing monoubiquitination at H2AK119 and by coordinating with PRC2 to promote trimethylation at H3K27 at the gene clusters encoding miR‐194. RBX1, another component in CRL4B complex, is also targeted by miR‐194 in NSCLC cells. Our results thus establish a double‐negative feedback loop between miR‐194 and CRL4B, dysregulation of which contributes to tumorigenesis. The function of miR‐194 as a negative regulator of CUL4B has therapeutic implications in lung cancer.
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Affiliation(s)
- Jun Mi
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, Shandong University School of Basic Medical Sciences, Jinan, China.,Shandong Provincial Key Laboratory of Oral Tissue Regeneration, Shandong University School of Stomatology, Jinan, China
| | - Yongxin Zou
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, Shandong University School of Basic Medical Sciences, Jinan, China
| | - Xiaohua Lin
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, Shandong University School of Basic Medical Sciences, Jinan, China
| | - Juanjuan Lu
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, Shandong University School of Basic Medical Sciences, Jinan, China
| | - Xiaochen Liu
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, Shandong University School of Basic Medical Sciences, Jinan, China
| | - Hui Zhao
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, Shandong University School of Basic Medical Sciences, Jinan, China
| | - Xiang Ye
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, Shandong University School of Basic Medical Sciences, Jinan, China
| | - Huili Hu
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, Shandong University School of Basic Medical Sciences, Jinan, China
| | - Baichun Jiang
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, Shandong University School of Basic Medical Sciences, Jinan, China
| | - Bo Han
- Department of Pathology, Shandong University School of Basic Medical Sciences, Jinan, China.,Department of Pathology, Shandong University Qilu Hospital, Jinan, China
| | - Changshun Shao
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, Shandong University School of Basic Medical Sciences, Jinan, China.,Department of Genetics/Human Genetics Institute of New Jersey, Piscataway, NJ, USA
| | - Yaoqin Gong
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, Shandong University School of Basic Medical Sciences, Jinan, China
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Abstract
Ubiquitination is a highly conserved post-translational modification in eukaryotes, well known for targeting proteins for degradation by the 26S proteasome. Proteins destined for proteasomal degradation are selected by E3 ubiquitin ligases. Cullin-RING E3 ubiquitin ligases (CRLs) are the largest superfamily of E3 ubiquitin ligases, with over 400 members known in mammals. These modular complexes are tightly regulated in the cell. In this chapter, we highlight recent structural and biochemical advances shedding light on the assembly and architecture of cullin-RING ligases, their dynamic regulation by a variety of host factors, and their manipulation by viral pathogens and small molecules.
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Affiliation(s)
- Henry C Nguyen
- Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, CT, 06511, USA
- Department of Biochemistry and Biophysics, University of California, San Francisco, CA, 94158, USA
| | - Wei Wang
- Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, CT, 06511, USA
| | - Yong Xiong
- Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, CT, 06511, USA.
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Jia L, Yan F, Cao W, Chen Z, Zheng H, Li H, Pan Y, Narula N, Ren X, Li H, Zhou P. Dysregulation of CUL4A and CUL4B Ubiquitin Ligases in Lung Cancer. J Biol Chem 2016; 292:2966-2978. [PMID: 27974468 DOI: 10.1074/jbc.m116.765230] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2016] [Revised: 11/29/2016] [Indexed: 01/11/2023] Open
Abstract
The Cullin-RING ubiquitin ligase 4 (CRL4) is implicated in controlling cell cycle, DNA damage repair, and checkpoint response based on studies employing cell lines and mouse models. CRL4 proteins, including CUL4A and CUL4B, are often highly accumulated in human malignancies. Elevated CRL4 attenuates DNA damage repair and increases genome instability that is believed to facilitate tumorigenesis. However, this has yet to be evaluated in human patients with cancer. In our study, 352 lung cancer and 62 normal lung specimens of Asian origin were constructed into tissue microarrays of four distinct lung cancer subtypes. Expression of CUL4A, CUL4B, and their substrates was detected by immunohistochemistry and analyzed statistically for their prognostic value and association with DNA damage response and genomic instability. Our results show that both CUL4A and CUL4B are overexpressed in the majority of lung carcinomas (PCUL4A <0.001 and PCUL4B <0.001) and significantly associated with tumor size (PCUL4A <0.001 and PCUL4B = 0.002), lymphatic invasion (PCUL4A = 0.004 and PCUL4B <0.001), metastasis (PCUL4A = 0.019 and PCUL4B = 0.006), and advanced TNM stage (PCUL4A <0.001 and PCUL4B <0.001), which parallels gene amplification and abnormal activation of the canonical WNT signaling. Moreover, overexpression of CUL4A, but not CUL4B, is significantly associated with tobacco smoking (p = 0.01) and is inversely correlated with XPC and P21, both of which are substrates of CUL4A (PCUL4A = 0.019 and PCUL4B = 0.006). Higher levels of CUL4A or CUL4B are significantly associated with the overall survival of patients (PCUL4A <0.001 and PCUL4B <0.001) and progression-free survival (PCUL4A <0.001 and PCUL4B = 0.001). Our findings revealed that CUL4A and CUL4B are differentially associated with etiologic factors for pulmonary malignancies and are independent prognostic markers for the survival of distinct lung cancer subtypes.
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Affiliation(s)
- Lei Jia
- From the Department of Immunology, Key Laboratory of Cancer Immunology and Biotherapy
| | - Fan Yan
- From the Department of Immunology, Key Laboratory of Cancer Immunology and Biotherapy.,the Departments of Pathology and Laboratory Medicine and
| | - Wenfeng Cao
- Department of Pathology, Key Laboratory of Tianjin Cancer Prevention and Treatment
| | - Zhengming Chen
- Healthcare Policy and Research, Weill Cornell Medical College, New York, New York 10065
| | - Hong Zheng
- Department of Epidemiology and Biostatistics, Key Laboratory of Breast Cancer Prevention and Therapy, Ministry of Education, Tianjin Key Laboratory of Cancer Prevention and Therapy, National Clinical Research Center for Cancer, and
| | - Haixin Li
- Department of Epidemiology and Biostatistics, Key Laboratory of Breast Cancer Prevention and Therapy, Ministry of Education, Tianjin Key Laboratory of Cancer Prevention and Therapy, National Clinical Research Center for Cancer, and
| | - Yi Pan
- Department of Pathology, Key Laboratory of Tianjin Cancer Prevention and Treatment
| | - Navneet Narula
- the Departments of Pathology and Laboratory Medicine and
| | - Xiubao Ren
- From the Department of Immunology, Key Laboratory of Cancer Immunology and Biotherapy,
| | - Hui Li
- From the Department of Immunology, Key Laboratory of Cancer Immunology and Biotherapy, .,the Department of Gastrointestinal Cancer Biology, Tianjin Medical University Cancer Institute and Hospital, Tianjin 300060, China and
| | - Pengbo Zhou
- From the Department of Immunology, Key Laboratory of Cancer Immunology and Biotherapy, .,the Departments of Pathology and Laboratory Medicine and
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