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Guo B, Zheng Y, Fan Y, Yang Y, Wang Y, Qin L, An Y, Xu X, Zhang X, Sun G, Dou H, Shao C, Gong Y, Jiang B, Hu H. Enhanced Apc Min/+ adenoma formation after epithelial CUL4B deletion by recruitment of myeloid-derived suppressor cells. Neoplasia 2024; 53:101005. [PMID: 38761506 PMCID: PMC11127156 DOI: 10.1016/j.neo.2024.101005] [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: 12/04/2023] [Revised: 04/10/2024] [Accepted: 05/10/2024] [Indexed: 05/20/2024]
Abstract
Colorectal cancer (CRC) stands as a prevalent malignancy globally. A pivotal event in CRC pathogenesis involves the loss-of-function mutation in the APC gene, leading to the formation of benign polyps. Despite the well-established role of APC, the contribution of CUL4B to CRC initiation in the pre-tumorous stage remains poorly understood. In this investigation, we generated a murine model by crossing ApcMin/+ mice with Cul4bΔIEC mice to achieve specific deletion of Cul4b in the gut epithelium against an ApcMin/+ background. By employing histological methods, RNA-sequencing (RNA-seq), and flow cytometry, we assessed alterations and characterized the immune microenvironment. Our results unveiled that CUL4B deficiency in gut epithelium expedited ApcMin/+ adenoma formation. Notably, CUL4B in adenomas restrained the accumulation of tumor-infiltrating myeloid-derived suppressor cells (MDSCs). In vivo inhibition of MDSCs significantly delayed the growth of CUL4B deleted ApcMin/+ adenomas. Furthermore, the addition of MDSCs to in vitro cultured ApcMin/+; Cul4bΔIEC adenoma organoids mitigated their alterations. Mechanistically, CUL4B directly interacted with the promoter of Csf3, the gene encoding granulocyte-colony stimulating factor (G-CSF) by coordinating with PRC2. Inhibiting CUL4B epigenetically activated the expression of G-CSF, promoting the recruitment of MDSCs. These findings offer novel insights into the tumor suppressor-like roles of CUL4B in regulating ApcMin/+ adenomas, suggesting a potential therapeutic strategy for CRC initiation and progression in the context of activated Wnt signaling.
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Affiliation(s)
- Beibei Guo
- The Key Laboratory of Experimental Teratology, Ministry of Education, Department of Systems Biomedicine, School of Basic Medical Sciences, Shandong University, Jinan, China; The Key Laboratory of Experimental Teratology, Ministry of Education, Department of Medical Genetics, School of Basic Medical Sciences, Shandong University, Jinan, China
| | - Yawen Zheng
- The Key Laboratory of Experimental Teratology, Ministry of Education, Department of Medical Genetics, School of Basic Medical Sciences, Shandong University, Jinan, China; Department of Obstetrics & Gynecology, Qilu Hospital of Shandong University, Jinan, China
| | - Yujia Fan
- The Key Laboratory of Experimental Teratology, Ministry of Education, Department of Systems Biomedicine, School of Basic Medical Sciences, Shandong University, Jinan, China; The Key Laboratory of Experimental Teratology, Ministry of Education, Department of Medical Genetics, School of Basic Medical Sciences, Shandong University, Jinan, China
| | - Yang Yang
- The Key Laboratory of Experimental Teratology, Ministry of Education, Department of Systems Biomedicine, School of Basic Medical Sciences, Shandong University, Jinan, China; The Key Laboratory of Experimental Teratology, Ministry of Education, Department of Medical Genetics, School of Basic Medical Sciences, Shandong University, Jinan, China
| | - Yuxing Wang
- The Key Laboratory of Experimental Teratology, Ministry of Education, Department of Medical Genetics, School of Basic Medical Sciences, Shandong University, Jinan, China
| | - Liping Qin
- The Key Laboratory of Experimental Teratology, Ministry of Education, Department of Medical Genetics, School of Basic Medical Sciences, Shandong University, Jinan, China
| | - Yachun An
- The Key Laboratory of Experimental Teratology, Ministry of Education, Department of Systems Biomedicine, School of Basic Medical Sciences, Shandong University, Jinan, China; The Key Laboratory of Experimental Teratology, Ministry of Education, Department of Medical Genetics, School of Basic Medical Sciences, Shandong University, Jinan, China
| | - Xiaoran Xu
- The Key Laboratory of Experimental Teratology, Ministry of Education, Department of Systems Biomedicine, School of Basic Medical Sciences, Shandong University, Jinan, China; The Key Laboratory of Experimental Teratology, Ministry of Education, Department of Medical Genetics, School of Basic Medical Sciences, Shandong University, Jinan, China
| | - Xiyu Zhang
- The Key Laboratory of Experimental Teratology, Ministry of Education, Department of Medical Genetics, School of Basic Medical Sciences, Shandong University, Jinan, China
| | - Gongping Sun
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Histoembryology, Shandong University Cheeloo Medical College, Shandong University School of Medicine, Jinan, China
| | - Hao Dou
- The Key Laboratory of Experimental Teratology, Ministry of Education, Department of Medical Genetics, School of Basic Medical Sciences, Shandong University, Jinan, 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, China
| | - Yaoqin Gong
- The Key Laboratory of Experimental Teratology, Ministry of Education, Department of Medical Genetics, School of Basic Medical Sciences, Shandong University, Jinan, China
| | - Baichun Jiang
- The Key Laboratory of Experimental Teratology, Ministry of Education, Department of Medical Genetics, School of Basic Medical Sciences, Shandong University, Jinan, China.
| | - Huili Hu
- The Key Laboratory of Experimental Teratology, Ministry of Education, Department of Systems Biomedicine, School of Basic Medical Sciences, Shandong University, Jinan, China; The Key Laboratory of Experimental Teratology, Ministry of Education, Department of Medical Genetics, School of Basic Medical Sciences, Shandong University, Jinan, China.
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Dai Z, Liang L, Wang W, Zuo P, Yu S, Liu Y, Zhao X, Lu Y, Jin Y, Zhang F, Ding D, Deng W, Yin Y. Structural insights into the ubiquitylation strategy of the oligomeric CRL2 FEM1B E3 ubiquitin ligase. EMBO J 2024; 43:1089-1109. [PMID: 38360992 PMCID: PMC10943247 DOI: 10.1038/s44318-024-00047-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: 08/22/2023] [Revised: 01/26/2024] [Accepted: 01/29/2024] [Indexed: 02/17/2024] Open
Abstract
Cullin-RING E3 ubiquitin ligase (CRL) family members play critical roles in numerous biological processes and diseases including cancer and Alzheimer's disease. Oligomerization of CRLs has been reported to be crucial for the regulation of their activities. However, the structural basis for its regulation and mechanism of its oligomerization are not fully known. Here, we present cryo-EM structures of oligomeric CRL2FEM1B in its unneddylated state, neddylated state in complex with BEX2 as well as neddylated state in complex with FNIP1/FLCN. These structures reveal that asymmetric dimerization of N8-CRL2FEM1B is critical for the ubiquitylation of BEX2 while FNIP1/FLCN is ubiquitylated by monomeric CRL2FEM1B. Our data present an example of the asymmetric homo-dimerization of CRL. Taken together, this study sheds light on the ubiquitylation strategy of oligomeric CRL2FEM1B according to substrates with different scales.
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Affiliation(s)
- Zonglin Dai
- Institute of Systems Biomedicine, Beijing Key Laboratory of Tumor Systems Biology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, 100191, China
- Department of Pathology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, 100191, China
| | - Ling Liang
- Institute of Systems Biomedicine, Beijing Key Laboratory of Tumor Systems Biology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, 100191, China
- Department of Biophysics, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, 100191, China
| | - Weize Wang
- Institute of Systems Biomedicine, Beijing Key Laboratory of Tumor Systems Biology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, 100191, China
- Peking-Tsinghua Center for Life Sciences, Peking University, Beijing, 100871, China
| | - Peng Zuo
- Institute of Systems Biomedicine, Beijing Key Laboratory of Tumor Systems Biology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, 100191, China
- Department of Pathology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, 100191, China
| | - Shang Yu
- Department of Biophysics, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, 100191, China
| | - Yaqi Liu
- Department of Physiology and Cellular Biophysics, Clyde and Helen Wu Center for Molecular Cardiology, Department of Medicine, Columbia University Vagelos College of Physicians and Surgeons, New York, NY, 10032, USA
| | - Xuyang Zhao
- Institute of Systems Biomedicine, Beijing Key Laboratory of Tumor Systems Biology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, 100191, China
| | - Yishuo Lu
- Institute of Systems Biomedicine, Beijing Key Laboratory of Tumor Systems Biology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, 100191, China
- Peking-Tsinghua Center for Life Sciences, Peking University, Beijing, 100871, China
| | - Yan Jin
- Institute of Systems Biomedicine, Beijing Key Laboratory of Tumor Systems Biology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, 100191, China
| | - Fangting Zhang
- Institute of Precision Medicine, Peking University Shenzhen Hospital, Shenzhen, 518036, China
| | - Dian Ding
- Institute of Systems Biomedicine, Beijing Key Laboratory of Tumor Systems Biology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, 100191, China
| | - Weiwei Deng
- Department of Mechanics and Aerospace Engineering, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Yuxin Yin
- Institute of Systems Biomedicine, Beijing Key Laboratory of Tumor Systems Biology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, 100191, China.
- Department of Pathology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, 100191, China.
- Peking-Tsinghua Center for Life Sciences, Peking University, Beijing, 100871, China.
- Institute of Precision Medicine, Peking University Shenzhen Hospital, Shenzhen, 518036, China.
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3
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Zambrano-Carrasco J, Zou J, Wang W, Sun X, Li J, Su H. Emerging Roles of Cullin-RING Ubiquitin Ligases in Cardiac Development. Cells 2024; 13:235. [PMID: 38334627 PMCID: PMC10854628 DOI: 10.3390/cells13030235] [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: 12/23/2023] [Revised: 01/18/2024] [Accepted: 01/22/2024] [Indexed: 02/10/2024] Open
Abstract
Heart development is a spatiotemporally regulated process that extends from the embryonic phase to postnatal stages. Disruption of this highly orchestrated process can lead to congenital heart disease or predispose the heart to cardiomyopathy or heart failure. Consequently, gaining an in-depth understanding of the molecular mechanisms governing cardiac development holds considerable promise for the development of innovative therapies for various cardiac ailments. While significant progress in uncovering novel transcriptional and epigenetic regulators of heart development has been made, the exploration of post-translational mechanisms that influence this process has lagged. Culling-RING E3 ubiquitin ligases (CRLs), the largest family of ubiquitin ligases, control the ubiquitination and degradation of ~20% of intracellular proteins. Emerging evidence has uncovered the critical roles of CRLs in the regulation of a wide range of cellular, physiological, and pathological processes. In this review, we summarize current findings on the versatile regulation of cardiac morphogenesis and maturation by CRLs and present future perspectives to advance our comprehensive understanding of how CRLs govern cardiac developmental processes.
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Affiliation(s)
- Josue Zambrano-Carrasco
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA; (J.Z.-C.); (J.Z.)
| | - Jianqiu Zou
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA; (J.Z.-C.); (J.Z.)
| | - Wenjuan Wang
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA; (J.Z.-C.); (J.Z.)
| | - Xinghui Sun
- Department of Biochemistry, University of Nebraska-Lincoln, Lincoln, NE 68588, USA;
| | - Jie Li
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA; (J.Z.-C.); (J.Z.)
| | - Huabo Su
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA; (J.Z.-C.); (J.Z.)
- Department of Pharmacology and Toxicology, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA
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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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5
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Stier A, Gilberto S, Mohamed WI, Royall LN, Helenius J, Mikicic I, Sajic T, Beli P, Müller DJ, Jessberger S, Peter M. The CUL4B-based E3 ubiquitin ligase regulates mitosis and brain development by recruiting phospho-specific DCAFs. EMBO J 2023; 42:e112847. [PMID: 37365982 PMCID: PMC10476281 DOI: 10.15252/embj.2022112847] [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: 10/17/2022] [Revised: 05/31/2023] [Accepted: 06/13/2023] [Indexed: 06/28/2023] Open
Abstract
The paralogs CUL4A and CUL4B assemble cullin-RING E3 ubiquitin ligase (CRL) complexes regulating multiple chromatin-associated cellular functions. Although they are structurally similar, we found that the unique N-terminal extension of CUL4B is heavily phosphorylated during mitosis, and the phosphorylation pattern is perturbed in the CUL4B-P50L mutation causing X-linked intellectual disability (XLID). Phenotypic characterization and mutational analysis revealed that CUL4B phosphorylation is required for efficient progression through mitosis, controlling spindle positioning and cortical tension. While CUL4B phosphorylation triggers chromatin exclusion, it promotes binding to actin regulators and to two previously unrecognized CUL4B-specific substrate receptors (DCAFs), LIS1 and WDR1. Indeed, co-immunoprecipitation experiments and biochemical analysis revealed that LIS1 and WDR1 interact with DDB1, and their binding is enhanced by the phosphorylated N-terminal domain of CUL4B. Finally, a human forebrain organoid model demonstrated that CUL4B is required to develop stable ventricular structures that correlate with onset of forebrain differentiation. Together, our study uncovers previously unrecognized DCAFs relevant for mitosis and brain development that specifically bind CUL4B, but not the CUL4B-P50L patient mutant, by a phosphorylation-dependent mechanism.
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Affiliation(s)
- Anna Stier
- Institute of BiochemistryETH ZurichZurichSwitzerland
| | - Samuel Gilberto
- Institute of BiochemistryETH ZurichZurichSwitzerland
- Present address:
Monte Rosa TherapeuticsBaselSwitzerland
| | | | - Lars N Royall
- Brain Research InstituteUniversity of ZurichZurichSwitzerland
| | - Jonne Helenius
- Department of Biosystems Science and EngineeringETH ZurichBaselSwitzerland
| | | | - Tatjana Sajic
- Institute of Molecular Systems BiologyETH ZürichZürichSwitzerland
- Present address:
Faculty Unit of Toxicology, CURML, Faculty of Biology and MedicineUniversity of LausanneLausanneSwitzerland
| | - Petra Beli
- Institute of Molecular BiologyMainzGermany
- Institute of Developmental Biology and Neurobiology (IDN)Johannes Gutenberg UniversityMainzGermany
| | - Daniel J Müller
- Department of Biosystems Science and EngineeringETH ZurichBaselSwitzerland
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Yu R, Han H, Chu S, Ding Y, Jin S, Wang Y, Jiang W, Liu Y, Zou Y, Wang M, Liu Q, Sun G, Jiang B, Gong Y. CUL4B orchestrates mesenchymal stem cell commitment by epigenetically repressing KLF4 and C/EBPδ. Bone Res 2023; 11:29. [PMID: 37268647 DOI: 10.1038/s41413-023-00263-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2022] [Revised: 03/23/2023] [Accepted: 04/04/2023] [Indexed: 06/04/2023] Open
Abstract
Dysregulated lineage commitment of mesenchymal stem cells (MSCs) contributes to impaired bone formation and an imbalance between adipogenesis and osteogenesis during skeletal aging and osteoporosis. The intrinsic cellular mechanism that regulates MSC commitment remains unclear. Here, we identified Cullin 4B (CUL4B) as a critical regulator of MSC commitment. CUL4B is expressed in bone marrow MSCs (BMSCs) and downregulated with aging in mice and humans. Conditional knockout of Cul4b in MSCs resulted in impaired postnatal skeletal development with low bone mass and reduced bone formation. Moreover, depletion of CUL4B in MSCs aggravated bone loss and marrow adipose accumulation during natural aging or after ovariectomy. In addition, CUL4B deficiency in MSCs reduced bone strength. Mechanistically, CUL4B promoted osteogenesis and inhibited adipogenesis of MSCs by repressing KLF4 and C/EBPδ expression, respectively. The CUL4B complex directly bound to Klf4 and Cebpd and epigenetically repressed their transcription. Collectively, this study reveals CUL4B-mediated epigenetic regulation of the osteogenic or adipogenic commitment of MSCs, which has therapeutic implications in osteoporosis.
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Affiliation(s)
- Ruiqi Yu
- The Key Laboratory of Experimental Teratology of the Ministry of Education and Department of Genetics, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, 250012, China
| | - Hong Han
- The Key Laboratory of Experimental Teratology of the Ministry of Education and Department of Genetics, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, 250012, China
| | - Shuxian Chu
- The Key Laboratory of Experimental Teratology of the Ministry of Education and Department of Genetics, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, 250012, China
| | - Yijun Ding
- The Key Laboratory of Liquid‒Solid Structural Evolution and Processing of Materials of Ministry of Education and Institute of Liquid Metal and Casting Technology, School of Materials Science and Engineering, Shandong University, Jinan, 250012, China
| | - Shiqi Jin
- The Key Laboratory of Experimental Teratology of the Ministry of Education and Department of Genetics, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, 250012, China
| | - Yufeng Wang
- The Key Laboratory of Experimental Teratology of the Ministry of Education and Department of Genetics, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, 250012, China
| | - Wei Jiang
- The Key Laboratory of Experimental Teratology of the Ministry of Education and Department of Genetics, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, 250012, China
| | - Yuting Liu
- The Key Laboratory of Experimental Teratology of the Ministry of Education and Department of Genetics, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, 250012, China
| | - Yongxin Zou
- The Key Laboratory of Experimental Teratology of the Ministry of Education and Department of Genetics, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, 250012, China
| | - Molin Wang
- The Key Laboratory of Experimental Teratology of the Ministry of Education and Department of Genetics, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, 250012, China
| | - Qiao Liu
- The Key Laboratory of Experimental Teratology of the Ministry of Education and Department of Genetics, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, 250012, China
| | - Gongping Sun
- The Key Laboratory of Experimental Teratology of the Ministry of Education and Department of Histology and Embryology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, 250012, China
| | - Baichun Jiang
- The Key Laboratory of Experimental Teratology of the Ministry of Education and Department of Genetics, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, 250012, China.
| | - Yaoqin Gong
- The Key Laboratory of Experimental Teratology of the Ministry of Education and Department of Genetics, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, 250012, China.
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7
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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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8
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Sferruzzi‐Perri AN, Lopez‐Tello J, Salazar‐Petres E. Placental adaptations supporting fetal growth during normal and adverse gestational environments. Exp Physiol 2023; 108:371-397. [PMID: 36484327 PMCID: PMC10103877 DOI: 10.1113/ep090442] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Accepted: 11/15/2022] [Indexed: 12/13/2022]
Abstract
NEW FINDINGS What is the topic of this review? How the placenta, which transports nutrients and oxygen to the fetus, may alter its support of fetal growth developmentally and with adverse gestational conditions. What advances does it highlight? Placental formation and function alter with the needs of the fetus for substrates for growth during normal gestation and when there is enhanced competition for substrates in species with multiple gestations or adverse gestational environments, and this is mediated by imprinted genes, signalling pathways, mitochondria and fetal sexomes. ABSTRACT The placenta is vital for mammalian development and a key determinant of life-long health. It is the interface between the mother and fetus and is responsible for transporting the nutrients and oxygen a fetus needs to develop and grow. Alterations in placental formation and function, therefore, have consequences for fetal growth and birthweight, which in turn determine perinatal survival and risk of non-communicable diseases for the offspring in later postnatal life. However, the placenta is not a static organ. As this review summarizes, research from multiple species has demonstrated that placental formation and function alter developmentally to the needs of the fetus for substrates for growth during normal gestation, as well as when there is greater competition for substrates in polytocous species and monotocous species with multiple gestations. The placenta also adapts in response to the gestational environment, integrating information about the ability of the mother to provide nutrients and oxygen with the needs of the fetus in that prevailing environment. In particular, placental structure (e.g. vascularity, surface area, blood flow, diffusion distance) and transport capacity (e.g. nutrient transporter levels and activity) respond to suboptimal gestational environments, namely malnutrition, obesity, hypoxia and maternal ageing. Mechanisms mediating developmentally and environmentally induced homeostatic responses of the placenta that help support normal fetal growth include imprinted genes, signalling pathways, subcellular constituents and fetal sexomes. Identification of these placental strategies may inform the development of therapies for complicated human pregnancies and advance understanding of the pathways underlying poor fetal outcomes and their consequences for health and disease risk.
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Affiliation(s)
- Amanda Nancy Sferruzzi‐Perri
- Centre for Trophoblast Research, Department of Physiology, Development and NeuroscienceUniversity of CambridgeCambridgeUK
| | - Jorge Lopez‐Tello
- Centre for Trophoblast Research, Department of Physiology, Development and NeuroscienceUniversity of CambridgeCambridgeUK
| | - Esteban Salazar‐Petres
- Centre for Trophoblast Research, Department of Physiology, Development and NeuroscienceUniversity of CambridgeCambridgeUK
- Facultad de CienciasDepartamento de Ciencias Básicas, Universidad Santo TomásValdiviaChile
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9
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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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10
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Sahota JS, Sharma B, Guleria K, Sambyal V. Candidate genes for infertility: an in-silico study based on cytogenetic analysis. BMC Med Genomics 2022; 15:170. [PMID: 35918717 PMCID: PMC9347124 DOI: 10.1186/s12920-022-01320-x] [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: 05/11/2022] [Accepted: 07/22/2022] [Indexed: 11/26/2022] Open
Abstract
Background The cause of infertility remains unclear in a significant proportion of reproductive-age couples who fail to conceive naturally. Chromosomal aberrations have been identified as one of the main genetic causes of male and female infertility. Structural chromosomal aberrations may disrupt the functioning of various genes, some of which may be important for fertility. The present study aims to identify candidate genes and putative functional interaction networks involved in male and female infertility using cytogenetic data from cultured peripheral blood lymphocytes of infertile patients. Methods Karyotypic analyses was done in 201 infertile patients (100 males and 101 females) and 201 age and gender matched healthy controls (100 males and 101 females) after 72 h peripheral lymphocyte culturing and GTG banding, followed by bioinformatic analysis using Cytoscape v3.8.2 and Metascape. Results Several chromosomal regions with a significantly higher frequency of structural aberrations were identified in the infertile males (5q2, 10q2, and 17q2) and females (6q2, 16q2, and Xq2). Segregation of the patients based on type of infertility (primary v/s secondary infertility) led to the identification of chromosomal regions with a significantly higher frequency of structural aberrations exclusively within the infertile males (5q2, 17q2) and females (16q2) with primary infertility. Cytoscape identified two networks specific to these regions: a male specific network with 99 genes and a female specific network with 109 genes. The top enriched GO terms within the male and female infertility networks were “skeletal system morphogenesis” and “mRNA transport” respectively. PSME3, PSMD3, and CDC27 were the top 3 hub genes identified within the male infertility network. Similarly, UPF3B, IRF8, and PSMB1 were the top 3 hub genes identified with the female infertility network. Among the hub genes identified in the male- and female-specific networks, PSMB1, PSMD3, and PSME3 are functional components of the proteasome complex. These hub genes have a limited number of reports related to their respective roles in maintenance of fertility in mice model and humans and require validation in further studies. Conclusion The candidate genes predicted in the present study can serve as targets for future research on infertility. Supplementary Information The online version contains supplementary material available at 10.1186/s12920-022-01320-x.
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Affiliation(s)
- Jatinder Singh Sahota
- Department of Human Genetics, Cytogenetics Laboratory, Guru Nanak Dev University (GNDU), Amritsar, Punjab, 143005, India
| | - Bhavna Sharma
- Department of Human Genetics, Cytogenetics Laboratory, Guru Nanak Dev University (GNDU), Amritsar, Punjab, 143005, India
| | - Kamlesh Guleria
- Department of Human Genetics, Cytogenetics Laboratory, Guru Nanak Dev University (GNDU), Amritsar, Punjab, 143005, India
| | - Vasudha Sambyal
- Department of Human Genetics, Cytogenetics Laboratory, Guru Nanak Dev University (GNDU), Amritsar, Punjab, 143005, India.
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11
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Cruz Walma DA, Chen Z, Bullock AN, Yamada KM. Ubiquitin ligases: guardians of mammalian development. Nat Rev Mol Cell Biol 2022; 23:350-367. [DOI: 10.1038/s41580-021-00448-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/14/2021] [Indexed: 12/17/2022]
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12
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The Names of Things: The 2018 Bernard Sachs Lecture. Pediatr Neurol 2021; 122:41-49. [PMID: 34330614 DOI: 10.1016/j.pediatrneurol.2021.05.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Accepted: 05/05/2021] [Indexed: 11/22/2022]
Abstract
In 2018, I was honored to receive the Bernard Sachs Award for a lifetime of work expanding knowledge of diverse neurodevelopmental disorders. Summarizing work over more than 30 years is difficult but is an opportunity to chronicle the dramatic changes in the medical and scientific world that have transformed the field of Child Neurology over this time, as reflected in my own work. Here I have chosen to highlight five broad themes of my research beginning with my interest in descriptive terms that drive wider understanding and my choice for the title of this review. From there I will go on to contrast the state of knowledge as I entered the field with the state of knowledge today for four human brain malformations-lissencephaly, megalencephaly, cerebellar malformations, and polymicrogyria. For all, the changes have been dramatic.
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13
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Tang WS, Weng L, Wang X, Liu CQ, Hu GS, Yin ST, Tao Y, Hong NN, Guo H, Liu W, Wang HR, Zhao TJ. The Mediator subunit MED20 organizes the early adipogenic complex to promote development of adipose tissues and diet-induced obesity. Cell Rep 2021; 36:109314. [PMID: 34233190 DOI: 10.1016/j.celrep.2021.109314] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Revised: 04/17/2021] [Accepted: 06/06/2021] [Indexed: 02/07/2023] Open
Abstract
MED20 is a non-essential subunit of the transcriptional coactivator Mediator complex, but its physiological function remains largely unknown. Here, we identify MED20 as a substrate of the anti-obesity CRL4-WDTC1 E3 ubiquitin ligase complex through affinity purification and candidate screening. Overexpression of WDTC1 leads to degradation of MED20, whereas depletion of WDTC1 or CUL4A/B causes accumulation of MED20. Depleting MED20 inhibits adipogenesis, and a non-degradable MED20 mutant restores adipogenesis in WDTC1-overexpressing cells. Furthermore, knockout of Med20 in preadipocytes abolishes development of brown adipose tissues. Removing one allele of Med20 in preadipocytes protects mice from diet-induced obesity and reverses weight gain in Cul4a- or Cul4b-depleted mice. Chromatin immunoprecipitation sequencing (ChIP-seq) analysis reveals that MED20 organizes the early adipogenic complex by bridging C/EBPβ and RNA polymerase II to promote transcription of the central adipogenic factor, PPARγ. Our findings have thus uncovered a critical role of MED20 in promoting adipogenesis, development of adipose tissue and diet-induced obesity.
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Affiliation(s)
- Wen-Shuai Tang
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, Fujian, China
| | - Li Weng
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, Fujian, China
| | - Xu Wang
- Shanghai Key Laboratory of Metabolic Remodeling and Disease, Zhongshan Hospital, Institute of Metabolism and Integrative Biology, Fudan University, Shanghai, China; Shanghai Qi Zhi Institute, Shanghai, China
| | - Chang-Qin Liu
- Department of Endocrinology and Diabetes, the First Affiliated Hospital, Xiamen University, Xiamen, Fujian, China
| | - Guo-Sheng Hu
- School of Pharmaceutical Sciences, Fujian Provincial Key Laboratory of Innovative Drug Target Research, Xiamen University, Xiamen, Fujian, China
| | - Shu-Ting Yin
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, Fujian, China
| | - Ying Tao
- Shanghai Key Laboratory of Metabolic Remodeling and Disease, Zhongshan Hospital, Institute of Metabolism and Integrative Biology, Fudan University, Shanghai, China
| | - Ni-Na Hong
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, Fujian, China
| | - Huiling Guo
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, Fujian, China
| | - Wen Liu
- School of Pharmaceutical Sciences, Fujian Provincial Key Laboratory of Innovative Drug Target Research, Xiamen University, Xiamen, Fujian, China
| | - Hong-Rui Wang
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, Fujian, China
| | - Tong-Jin Zhao
- Shanghai Key Laboratory of Metabolic Remodeling and Disease, Zhongshan Hospital, Institute of Metabolism and Integrative Biology, Fudan University, Shanghai, China; Shanghai Qi Zhi Institute, Shanghai, China.
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14
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Wang X, Wang HY, Hu GS, Tang WS, Weng L, Zhang Y, Guo H, Yao SS, Liu SY, Zhang GL, Han Y, Liu M, Zhang XD, Cen X, Shen HF, Xiao N, Liu CQ, Wang HR, Huang J, Liu W, Li P, Zhao TJ. DDB1 binds histone reader BRWD3 to activate the transcriptional cascade in adipogenesis and promote onset of obesity. Cell Rep 2021; 35:109281. [PMID: 34161765 DOI: 10.1016/j.celrep.2021.109281] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Revised: 04/17/2021] [Accepted: 05/28/2021] [Indexed: 02/07/2023] Open
Abstract
Obesity has become a global pandemic. Identification of key factors in adipogenesis helps to tackle obesity and related metabolic diseases. Here, we show that DDB1 binds the histone reader BRWD3 to promote adipogenesis and diet-induced obesity. Although typically recognized as a component of the CUL4-RING E3 ubiquitin ligase complex, DDB1 stimulates adipogenesis independently of CUL4. A DDB1 mutant that does not bind CUL4A or CUL4B fully restores adipogenesis in DDB1-deficient cells. Ddb1+/- mice show delayed postnatal development of white adipose tissues and are protected from diet-induced obesity. Mechanistically, by interacting with BRWD3, DDB1 is recruited to acetylated histones in the proximal promoters of ELK1 downstream immediate early response genes and facilitates the release of paused RNA polymerase II, thereby activating the transcriptional cascade in adipogenesis. Our findings have uncovered a CUL4-independent function of DDB1 in promoting the transcriptional cascade of adipogenesis, development of adipose tissues, and onset of obesity.
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Affiliation(s)
- Xu Wang
- Shanghai Key Laboratory of Metabolic Remodeling and Disease, Institute of Metabolism and Integrative Biology, Zhongshan Hospital, Fudan University, and Shanghai Qi Zhi Institute, Shanghai, China; State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, Fujian, China
| | - Hao-Yan Wang
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, Fujian, China
| | - Guo-Sheng Hu
- State Key Laboratory of Cellular Stress Biology, School of Pharmaceutical Sciences, Xiamen, Fujian, China
| | - Wen-Shuai Tang
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, Fujian, China
| | - Li Weng
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, Fujian, China
| | - Yuzhu Zhang
- Shanghai Institute of Precision Medicine, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200125, China
| | - Huiling Guo
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, Fujian, China
| | - Shan-Shan Yao
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, Fujian, China
| | - Shen-Ying Liu
- Shanghai Key Laboratory of Metabolic Remodeling and Disease, Institute of Metabolism and Integrative Biology, Zhongshan Hospital, Fudan University, and Shanghai Qi Zhi Institute, Shanghai, China
| | - Guo-Liang Zhang
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, Fujian, China
| | - Yan Han
- Department of Endocrinology and Diabetes, the First Affiliated Hospital, Xiamen University, Xiamen, Fujian, China
| | - Min Liu
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, Fujian, China
| | - Xiao-Dong Zhang
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, Fujian, China
| | - Xiang Cen
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, Fujian, China
| | - Hai-Feng Shen
- State Key Laboratory of Cellular Stress Biology, School of Pharmaceutical Sciences, Xiamen, Fujian, China
| | - Nengming Xiao
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, Fujian, China
| | - Chang-Qin Liu
- Department of Endocrinology and Diabetes, the First Affiliated Hospital, Xiamen University, Xiamen, Fujian, China
| | - Hong-Rui Wang
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, Fujian, China
| | - Jing Huang
- Shanghai Institute of Precision Medicine, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200125, China
| | - Wen Liu
- State Key Laboratory of Cellular Stress Biology, School of Pharmaceutical Sciences, Xiamen, Fujian, China
| | - Peng Li
- Shanghai Key Laboratory of Metabolic Remodeling and Disease, Institute of Metabolism and Integrative Biology, Zhongshan Hospital, Fudan University, and Shanghai Qi Zhi Institute, Shanghai, China; State Key Laboratory of Membrane Biology and Tsinghua-Peking Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing, China
| | - Tong-Jin Zhao
- Shanghai Key Laboratory of Metabolic Remodeling and Disease, Institute of Metabolism and Integrative Biology, Zhongshan Hospital, Fudan University, and Shanghai Qi Zhi Institute, Shanghai, China; State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, Fujian, China.
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15
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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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16
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Song Q, Feng S, Peng W, Li A, Ma T, Yu B, Liu HM. Cullin-RING Ligases as Promising Targets for Gastric Carcinoma Treatment. Pharmacol Res 2021; 170:105493. [PMID: 33600940 DOI: 10.1016/j.phrs.2021.105493] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Revised: 02/07/2021] [Accepted: 02/11/2021] [Indexed: 12/14/2022]
Abstract
Gastric carcinoma has serious morbidity and mortality, which seriously threats human health. The studies on gastrointestinal cell biology have shown that the ubiquitination modification that occurs after protein translation plays an essential role in the pathogenesis of gastric carcinoma. Protein ubiquitination is catalyzed by E3 ubiquitin ligase and can regulate various substrate proteins in different cellular pathways. Cullin-RING E3 ligase (CRLs) is a representative of the E3 ubiquitin ligase family, which requires cullin (CUL) neddylation modification for activation to regulate homeostasis of ~20% of cellular proteins. The substrate molecules regulated by CRLs are often involved in many cell progressions such as cell cycle progression, cell apoptosis, DNA damage and repair. Given that CRLs play an important role in modulation of biological activities, so targeting a certain CULs member neddylation may be an attractive strategy for selectively controlling the cellular proteins levels to achieve the goal of cancer treatment. In this review, we will discuss the roles of CULs and Ring protein in gastric carcinoma and summarize the current neddylation modulators for gastric carcinoma treatment.
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Affiliation(s)
- Qianqian Song
- School of Pharmaceutical Sciences, Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, Zhengzhou University, Zhengzhou 450001, PR China
| | - Siqi Feng
- School of Pharmaceutical Sciences, Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, Zhengzhou University, Zhengzhou 450001, PR China
| | - Wenjun Peng
- School of Pharmaceutical Sciences, Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, Zhengzhou University, Zhengzhou 450001, PR China
| | - Anqi Li
- School of Pharmaceutical Sciences, Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, Zhengzhou University, Zhengzhou 450001, PR China
| | - Ting Ma
- School of Pharmaceutical Sciences, Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, Zhengzhou University, Zhengzhou 450001, PR China; State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, PR China.
| | - Bin Yu
- School of Pharmaceutical Sciences, Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, Zhengzhou University, Zhengzhou 450001, PR China; State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, PR China.
| | - Hong-Min Liu
- School of Pharmaceutical Sciences, Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, Zhengzhou University, Zhengzhou 450001, PR China.
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17
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Kouloulia S, Hallin EI, Simbriger K, Amorim IS, Lach G, Amvrosiadis T, Chalkiadaki K, Kampaite A, Truong VT, Hooshmandi M, Jafarnejad SM, Skehel P, Kursula P, Khoutorsky A, Gkogkas CG. Raptor-Mediated Proteasomal Degradation of Deamidated 4E-BP2 Regulates Postnatal Neuronal Translation and NF-κB Activity. Cell Rep 2020; 29:3620-3635.e7. [PMID: 31825840 PMCID: PMC6915327 DOI: 10.1016/j.celrep.2019.11.023] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2019] [Revised: 09/06/2019] [Accepted: 11/06/2019] [Indexed: 12/14/2022] Open
Abstract
The translation initiation repressor 4E-BP2 is deamidated in the brain on asparagines N99/N102 during early postnatal brain development. This post-translational modification enhances 4E-BP2 association with Raptor, a central component of mTORC1 and alters the kinetics of excitatory synaptic transmission. We show that 4E-BP2 deamidation is neuron specific, occurs in the human brain, and changes 4E-BP2 subcellular localization, but not its disordered structure state. We demonstrate that deamidated 4E-BP2 is ubiquitinated more and degrades faster than the unmodified protein. We find that enhanced deamidated 4E-BP2 degradation is dependent on Raptor binding, concomitant with increased association with a Raptor-CUL4B E3 ubiquitin ligase complex. Deamidated 4E-BP2 stability is promoted by inhibiting mTORC1 or glutamate receptors. We further demonstrate that deamidated 4E-BP2 regulates the translation of a distinct pool of mRNAs linked to cerebral development, mitochondria, and NF-κB activity, and thus may be crucial for postnatal brain development in neurodevelopmental disorders, such as ASD. Deamidated 4E-BP2 occurs in neurons and is susceptible to ubiquitination/degradation mTORC1 or glutamate receptor inhibition stabilizes deamidated 4E-BP2 A Raptor-CUL4B ubiquitin ligase complex binds to deamidated 4E-BP2 Deamidated 4E-BP2 regulates postnatal brain translation and NF-κB activity
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Affiliation(s)
- Stella Kouloulia
- Centre for Discovery Brain Sciences and Patrick Wild Centre, University of Edinburgh, Edinburgh EH8 9XD, UK
| | - Erik I Hallin
- Department of Biomedicine, University of Bergen, Bergen N-5020, Norway
| | - Konstanze Simbriger
- Centre for Discovery Brain Sciences and Patrick Wild Centre, University of Edinburgh, Edinburgh EH8 9XD, UK
| | - Inês S Amorim
- Centre for Discovery Brain Sciences and Patrick Wild Centre, University of Edinburgh, Edinburgh EH8 9XD, UK
| | - Gilliard Lach
- Centre for Discovery Brain Sciences and Patrick Wild Centre, University of Edinburgh, Edinburgh EH8 9XD, UK
| | - Theoklitos Amvrosiadis
- Centre for Discovery Brain Sciences and Patrick Wild Centre, University of Edinburgh, Edinburgh EH8 9XD, UK
| | - Kleanthi Chalkiadaki
- Centre for Discovery Brain Sciences and Patrick Wild Centre, University of Edinburgh, Edinburgh EH8 9XD, UK
| | - Agniete Kampaite
- Centre for Discovery Brain Sciences and Patrick Wild Centre, University of Edinburgh, Edinburgh EH8 9XD, UK
| | - Vinh Tai Truong
- Department of Anesthesia and Alan Edwards Centre for Research on Pain, McGill University, Montréal H3A 0G1, QC, Canada
| | - Mehdi Hooshmandi
- Department of Anesthesia and Alan Edwards Centre for Research on Pain, McGill University, Montréal H3A 0G1, QC, Canada
| | - Seyed Mehdi Jafarnejad
- Centre for Cancer Research and Cell Biology, Queen's University of Belfast, Belfast BT9 7AE, UK
| | - Paul Skehel
- Centre for Discovery Brain Sciences and Patrick Wild Centre, University of Edinburgh, Edinburgh EH8 9XD, UK
| | - Petri Kursula
- Department of Biomedicine, University of Bergen, Bergen N-5020, Norway; Faculty of Biochemistry and Molecular Medicine, University of Oulu, Oulu FI-90014, Finland
| | - Arkady Khoutorsky
- Department of Anesthesia and Alan Edwards Centre for Research on Pain, McGill University, Montréal H3A 0G1, QC, Canada.
| | - Christos G Gkogkas
- Centre for Discovery Brain Sciences and Patrick Wild Centre, University of Edinburgh, Edinburgh EH8 9XD, UK; Simons Initiative for the Developing Brain, University of Edinburgh, Edinburgh EH8 9XD, UK.
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18
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Ashok C, Selvam M, Ponne S, Parcha PK, Raja KMP, Baluchamy S. CREB acts as a common transcription factor for major epigenetic repressors; DNMT3B, EZH2, CUL4B and E2F6. Med Oncol 2020; 37:68. [PMID: 32710193 DOI: 10.1007/s12032-020-01395-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2020] [Accepted: 07/16/2020] [Indexed: 12/28/2022]
Abstract
CREB signaling is known for several decades, but how it regulates both positive and negative regulators of cell proliferation is not well understood. On the other hand functions of major epigenetic repressors such as DNMT3B, EZH2 and CUL4B for their repressive epigenetic modifications on chromatin have also been well studied. However, there is very limited information available on how these repressors are regulated at their transcriptional level. Here, using computational tools and molecular techniques including site directed mutagenesis, promoter reporter assay, chromatin immunoprecipitation (ChIP), we identified that CREB acts as a common transcription factor for DNMT3B, EZH2, CUL4B and E2F6. ChIP assay revealed that pCREB binds to promoters of these repressors at CREs and induce their transcription. As expected, the expression of these repressors and their associated repressive marks particularly H3K27me3 and H2AK119ub are increased and decreased upon CREB overexpression and knock-down conditions respectively in the cancer cells indicating that CREB regulates the functions of these repressors by activating their transcription. Since CREB and these epigenetic repressors are overexpressed in various cancer types, our findings showed the molecular relationship between them and indicate that CREB is an important therapeutic target for cancer therapy.
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Affiliation(s)
- Cheemala Ashok
- Department of Biotechnology, Pondicherry Central University, R. V. Nagar, Kalapet, Pondicherry, 605014, India
| | - Murugan Selvam
- Department of Biotechnology, Pondicherry Central University, R. V. Nagar, Kalapet, Pondicherry, 605014, India
| | - Saravanaraman Ponne
- Department of Biotechnology, Pondicherry Central University, R. V. Nagar, Kalapet, Pondicherry, 605014, India
| | - Phani K Parcha
- Department of Biochemistry and Molecular Biology, Pondicherry Central University, Pondicherry, 605014, India
| | | | - Sudhakar Baluchamy
- Department of Biotechnology, Pondicherry Central University, R. V. Nagar, Kalapet, Pondicherry, 605014, India.
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19
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Majer F, Kousal B, Dusek P, Piherova L, Reboun M, Mihalova R, Gurka J, Krebsova A, Vlaskova H, Dvorakova L, Krihova J, Liskova P, Kmoch S, Kalina T, Kubanek M, Sikora J. Alu
‐mediated
Xq24
deletion encompassing
CUL4B
,
LAMP2
,
ATP1B4
,
TMEM255A
, and
ZBTB33
genes causes Danon disease in a female patient. Am J Med Genet A 2019; 182:219-223. [DOI: 10.1002/ajmg.a.61416] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Revised: 10/08/2019] [Accepted: 11/04/2019] [Indexed: 01/03/2023]
Affiliation(s)
- Filip Majer
- Research Unit for Rare Diseases, Department of Pediatrics and Adolescent Medicine 1st Faculty of Medicine, Charles University and General University Hospital Prague Czech Republic
| | - Bohdan Kousal
- Research Unit for Rare Diseases, Department of Pediatrics and Adolescent Medicine 1st Faculty of Medicine, Charles University and General University Hospital Prague Czech Republic
- Department of Ophthalmology 1st Faculty of Medicine, Charles University and General University Hospital Prague Czech Republic
| | - Petr Dusek
- Department of Neurology and Center of Clinical Neuroscience 1st Faculty of Medicine, Charles University and General University Hospital Prague Czech Republic
- Department of Radiology 1st Faculty of Medicine, Charles University and General University Hospital Prague Czech Republic
| | - Lenka Piherova
- Research Unit for Rare Diseases, Department of Pediatrics and Adolescent Medicine 1st Faculty of Medicine, Charles University and General University Hospital Prague Czech Republic
| | - Martin Reboun
- Research Unit for Rare Diseases, Department of Pediatrics and Adolescent Medicine 1st Faculty of Medicine, Charles University and General University Hospital Prague Czech Republic
| | - Romana Mihalova
- Institute of Biology and Medical Genetics 1st Faculty of Medicine, Charles University and General University Hospital Prague Czech Republic
| | - Jiri Gurka
- Department of Cardiology Institute for Clinical and Experimental Medicine Prague Czech Republic
| | - Alice Krebsova
- Department of Cardiology Institute for Clinical and Experimental Medicine Prague Czech Republic
| | - Hana Vlaskova
- Research Unit for Rare Diseases, Department of Pediatrics and Adolescent Medicine 1st Faculty of Medicine, Charles University and General University Hospital Prague Czech Republic
| | - Lenka Dvorakova
- Research Unit for Rare Diseases, Department of Pediatrics and Adolescent Medicine 1st Faculty of Medicine, Charles University and General University Hospital Prague Czech Republic
| | - Jana Krihova
- Department of Psychology Thomayer Hospital Prague Czech Republic
| | - Petra Liskova
- Research Unit for Rare Diseases, Department of Pediatrics and Adolescent Medicine 1st Faculty of Medicine, Charles University and General University Hospital Prague Czech Republic
- Department of Ophthalmology 1st Faculty of Medicine, Charles University and General University Hospital Prague Czech Republic
| | - Stanislav Kmoch
- Research Unit for Rare Diseases, Department of Pediatrics and Adolescent Medicine 1st Faculty of Medicine, Charles University and General University Hospital Prague Czech Republic
| | - Tomas Kalina
- Department of Paediatric Haematology and Oncology, Childhood Leukaemia Investigation Prague, 2nd Faculty of Medicine Charles University and University Hospital Motol Prague Czech Republic
| | - Milos Kubanek
- Department of Cardiology Institute for Clinical and Experimental Medicine Prague Czech Republic
| | - Jakub Sikora
- Research Unit for Rare Diseases, Department of Pediatrics and Adolescent Medicine 1st Faculty of Medicine, Charles University and General University Hospital Prague Czech Republic
- Institute of Pathology 1st Faculty of Medicine, Charles University and General University Hospital Prague Czech Republic
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20
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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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21
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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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22
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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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23
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Cullin-4B E3 ubiquitin ligase mediates Apaf-1 ubiquitination to regulate caspase-9 activity. PLoS One 2019; 14:e0219782. [PMID: 31329620 PMCID: PMC6645535 DOI: 10.1371/journal.pone.0219782] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Accepted: 07/01/2019] [Indexed: 11/25/2022] Open
Abstract
Apoptotic protease-activating factor 1 (Apaf-1) is a component of apoptosome, which regulates caspase-9 activity. In addition to apoptosis, Apaf-1 plays critical roles in the intra-S-phase checkpoint; therefore, impaired expression of Apaf-1 has been demonstrated in chemotherapy-resistant malignant melanoma and nuclear translocation of Apaf-1 has represented a favorable prognosis of patients with non-small cell lung cancer. In contrast, increased levels of Apaf-1 protein are observed in the brain in Huntington’s disease. The regulation of Apaf-1 protein is not yet fully understood. In this study, we show that etoposide triggers the interaction of Apaf-1 with Cullin-4B, resulting in enhanced Apaf-1 ubiquitination. Ubiquitinated Apaf-1, which was degraded in healthy cells, binds p62 and forms aggregates in the cytosol. This complex of ubiquitinated Apaf-1 and p62 induces caspase-9 activation following MG132 treatment of HEK293T cells that stably express bcl-xl. These results show that ubiquitinated Apaf-1 may activate caspase-9 under conditions of proteasome impairment.
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24
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Chen CY, Yu IS, Pai CH, Lin CY, Lin SR, Chen YT, Lin SW. Embryonic Cul4b is important for epiblast growth and location of primitive streak layer cells. PLoS One 2019; 14:e0219221. [PMID: 31260508 PMCID: PMC6602292 DOI: 10.1371/journal.pone.0219221] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Accepted: 06/19/2019] [Indexed: 11/18/2022] Open
Abstract
Cul4b-null (Cul4bΔ/Y) mice undergo growth arrest and degeneration during the early embryonic stages and die at E9.5. The pathogenic causes of this lethality remain incompletely characterized. However, it has been hypothesized that the loss of Cul4b function in extraembryonic tissues plays a key role. In this study, we investigated possible causes of death for Cul4b-null embryos, particularly in regard to the role of embryonic Cul4b. First, we show that the loss of embryonic Cul4b affects the growth of the inner cell mass in vitro and delays epiblast development during the gastrulation period at E6.5~E7.5 in vivo, as highlighted by the absence of the epiblastic transcription factor Brachyury from E6.5~E7.5. Additionally, at E7.5, strong and laterally expanded expression of Eomes and Fgf8 signaling was detected. Sectioning of these embryos showed disorganized primitive streak layer cells. Second, we observed that Mash2-expressing cells were present in the extraembryonic tissues of Cul4b-deficient embryos at E6.5 but were absent at E7.5. In addition, the loss of Cul4b resulted in decreased expression of cyclin proteins, which are required for the cell cycle transition from G1 to S. Taken together, these observations suggest that the embryonic expression of Cul4b is important for epiblast growth during E6.5~E7.5, and the loss of Cul4b results in either delayed growth of the epiblast or defective localization of primitive streak layer cells. As a result, the signaling activity mediated by the epiblast for subsequent ectoplacental cone development is affected, with the potential to induce growth retardation and lethality in Cul4bΔ/Y embryos.
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Affiliation(s)
- Chun-Yu Chen
- Department of Clinical Laboratory Sciences and Medical Biotechnology, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - I-Shing Yu
- Laboratory Animal Center, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Chen-Hsueh Pai
- Department of Clinical Laboratory Sciences and Medical Biotechnology, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Chien-Yu Lin
- Department of Clinical Laboratory Sciences and Medical Biotechnology, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Shu-Rung Lin
- Department of Bioscience Technology, College of Science, Chung-Yuan Christian University, Taoyuan, Taiwan
- Center for Nanotechnology and Center for Biomedical Technology, Chung-Yuan Christian University, Taoyuan, Taiwan
| | - You-Tzung Chen
- Graduate Institute of Medical Genomics and Proteomics, National Taiwan University College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Shu-Wha Lin
- Department of Clinical Laboratory Sciences and Medical Biotechnology, College of Medicine, National Taiwan University, Taipei, Taiwan
- Department of Laboratory Medicine, National Taiwan University Hospital, College of Medicine, National Taiwan University, Taipei, Taiwan
- Center of Genomic Medicine, National Taiwan University, Taipei, Taiwan
- * E-mail:
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25
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Upregulation of IL-6 in CUL4B-deficient myeloid-derived suppressive cells increases the aggressiveness of cancer cells. Oncogene 2019; 38:5860-5872. [PMID: 31235785 DOI: 10.1038/s41388-019-0847-x] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2018] [Revised: 01/12/2019] [Accepted: 04/11/2019] [Indexed: 12/16/2022]
Abstract
Cancer progression depends on a tumor-supportive microenvironment. Myeloid-derived suppressor cells (MDSCs) represent key cellular components in tumor microenvironment and have been demonstrated to facilitate tumor progression by restricting host immune responses and by sustaining the malignancy of cancer cells. CUL4B, which assembles the CUL4B-RING E3 ligase complex (CRL4B), possesses a potent oncogenic property in cancer cells by epigenetically inactivating many tumor suppressors. However, CUL4B in hematopoietic cells exerts tumor-suppressive effect by restricting the accumulation and function of MDSCs. How CUL4B regulates the function of MDSCs is not fully characterized. In the present study, we demonstrate that the enhanced growth and metastasis of transplanted tumor cells in hematopoietic or myeloid cell-specific Cul4b knockout recipient mice is mediated by increased production of IL-6 in MDSCs. CUL4B complex epigenetically represses IL-6 transcription in myeloid cells. The IL-6 produced by MDSCs renders cancer cells stem cell-like properties by activating IL-6/STAT3 signaling. This crosstalk was effectively blocked either by blocking IL-6 in MDSCs or by inhibition of STAT3 activation in tumor cells. These findings provide a new mechanistic insight into the cancer-promoting property of MDSCs.
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26
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Cul4a promotes zebrafish primitive erythropoiesis via upregulating scl and gata1 expression. Cell Death Dis 2019; 10:388. [PMID: 31101894 PMCID: PMC6525236 DOI: 10.1038/s41419-019-1629-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2018] [Revised: 04/30/2019] [Accepted: 05/06/2019] [Indexed: 12/27/2022]
Abstract
CUL4A and CUL4B are closely related members in Cullin family and can each assemble a Cullin-RING E3 ligase complex (Cullin-RING Ligase 4A or 4B, CRL4A, or CRL4B) and participate in a variety of biological processes. Previously we showed that zebrafish cul4a, but not cul4b, is essential for cardiac and pectoral fin development. Here, we have identified cul4a as a crucial regulator of primitive erythropoiesis in zebrafish embryonic development. Depletion of cul4a resulted in a striking reduction of erythroid cells due to the inhibition of erythroid differentiation. Transcript levels for early hematopoietic regulatory genes including scl, lmo2, and gata1 are significantly reduced in cul4a-deficient embryos. Mechanistically, we demonstrated that scl and gata1, the central regulators of primitive hematopoiesis for erythroid determination, are transcriptionally upregulated by cul4a. These findings demonstrate an important role for cul4a in primitive erythropoiesis and may bear implications in regeneration medicine of anemia and related diseases.
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27
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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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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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29
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Liu R, Gao J, Yang Y, Qiu R, Zheng Y, Huang W, Zeng Y, Hou Y, Wang S, Leng S, Feng D, Yu W, Sun G, Shi H, Teng X, Wang Y. PHD finger protein 1 (PHF1) is a novel reader for histone H4R3 symmetric dimethylation and coordinates with PRMT5-WDR77/CRL4B complex to promote tumorigenesis. Nucleic Acids Res 2018; 46:6608-6626. [PMID: 29846670 PMCID: PMC6061854 DOI: 10.1093/nar/gky461] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2017] [Revised: 05/02/2018] [Accepted: 05/18/2018] [Indexed: 12/13/2022] Open
Abstract
Histone post-translational modifications regulate chromatin structure and function largely through interactions with effector proteins that often contain multiple histone-binding domains. PHF1 [plant homeodomain (PHD) finger protein 1], which contains two kinds of histone reader modules, a Tudor domain and two PHD fingers, is an essential factor for epigenetic regulation and genome maintenance. While significant progress has been made in characterizing the function of the Tudor domain, the roles of the two PHD fingers are poorly defined. Here, we demonstrated that the N-terminal PHD finger of PHF1 recognizes symmetric dimethylation of H4R3 (H4R3me2s) catalyzed by PRMT5-WDR77. However, the C-terminal PHD finger of PHF1, instead of binding to modified histones, directly interacts with DDB1, the main component of the CUL4B-Ring E3 ligase complex (CRL4B), which is responsible for H2AK119 mono-ubiquitination (H2AK119ub1). We showed that PHF1, PRMT5-WDR77, and CRL4B reciprocally interact with one another and collaborate as a functional unit. Genome-wide analysis of PHF1/PRMT5/CUL4B targets identified a cohort of genes including E-cadherin and FBXW7, which are critically involved in cell growth and migration. We demonstrated that PHF1 promotes cell proliferation, invasion, and tumorigenesis in vivo and in vitro and found that its expression is markedly upregulated in a variety of human cancers. Our data identified a new reader for H4R3me2s and provided a molecular basis for the functional interplay between histone arginine methylation and ubiquitination. The results also indicated that PHF1 is a key factor in cancer progression, supporting the pursuit of PHF1 as a target for cancer therapy.
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Affiliation(s)
- Ruiqiong Liu
- 2011 Collaborative Innovation Center of Tianjin for Medical Epigenetics, Tianjin Key Laboratory of Cellular and Molecular Immunology, Key Laboratory of Immune Microenvironment and Disease (Ministry of Education), Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin 300070, China
| | - Jie Gao
- 2011 Collaborative Innovation Center of Tianjin for Medical Epigenetics, Tianjin Key Laboratory of Cellular and Molecular Immunology, Key Laboratory of Immune Microenvironment and Disease (Ministry of Education), Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin 300070, China
| | - Yang Yang
- 2011 Collaborative Innovation Center of Tianjin for Medical Epigenetics, Tianjin Key Laboratory of Cellular and Molecular Immunology, Key Laboratory of Immune Microenvironment and Disease (Ministry of Education), Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin 300070, China
| | - Rongfang Qiu
- 2011 Collaborative Innovation Center of Tianjin for Medical Epigenetics, Tianjin Key Laboratory of Cellular and Molecular Immunology, Key Laboratory of Immune Microenvironment and Disease (Ministry of Education), Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin 300070, China
| | - Yu Zheng
- 2011 Collaborative Innovation Center of Tianjin for Medical Epigenetics, Tianjin Key Laboratory of Cellular and Molecular Immunology, Key Laboratory of Immune Microenvironment and Disease (Ministry of Education), Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin 300070, China
| | - Wei Huang
- 2011 Collaborative Innovation Center of Tianjin for Medical Epigenetics, Tianjin Key Laboratory of Cellular and Molecular Immunology, Key Laboratory of Immune Microenvironment and Disease (Ministry of Education), Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin 300070, China
| | - Yi Zeng
- 2011 Collaborative Innovation Center of Tianjin for Medical Epigenetics, Tianjin Key Laboratory of Cellular and Molecular Immunology, Key Laboratory of Immune Microenvironment and Disease (Ministry of Education), Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin 300070, China
| | - Yongqiang Hou
- 2011 Collaborative Innovation Center of Tianjin for Medical Epigenetics, Tianjin Key Laboratory of Cellular and Molecular Immunology, Key Laboratory of Immune Microenvironment and Disease (Ministry of Education), Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin 300070, China
| | - Shuang Wang
- 2011 Collaborative Innovation Center of Tianjin for Medical Epigenetics, Tianjin Key Laboratory of Cellular and Molecular Immunology, Key Laboratory of Immune Microenvironment and Disease (Ministry of Education), Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin 300070, China
| | - Shuai Leng
- 2011 Collaborative Innovation Center of Tianjin for Medical Epigenetics, Tianjin Key Laboratory of Cellular and Molecular Immunology, Key Laboratory of Immune Microenvironment and Disease (Ministry of Education), Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin 300070, China
| | - Dandan Feng
- 2011 Collaborative Innovation Center of Tianjin for Medical Epigenetics, Tianjin Key Laboratory of Cellular and Molecular Immunology, Key Laboratory of Immune Microenvironment and Disease (Ministry of Education), Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin 300070, China
| | - Wenqian Yu
- 2011 Collaborative Innovation Center of Tianjin for Medical Epigenetics, Tianjin Key Laboratory of Cellular and Molecular Immunology, Key Laboratory of Immune Microenvironment and Disease (Ministry of Education), Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin 300070, China
| | - Gancheng Sun
- 2011 Collaborative Innovation Center of Tianjin for Medical Epigenetics, Tianjin Key Laboratory of Cellular and Molecular Immunology, Key Laboratory of Immune Microenvironment and Disease (Ministry of Education), Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin 300070, China
| | - Hang Shi
- 2011 Collaborative Innovation Center of Tianjin for Medical Epigenetics, Tianjin Key Laboratory of Cellular and Molecular Immunology, Key Laboratory of Immune Microenvironment and Disease (Ministry of Education), Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin 300070, China
| | - Xu Teng
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Capital Medical University, Beijing 100069, China
| | - Yan Wang
- 2011 Collaborative Innovation Center of Tianjin for Medical Epigenetics, Tianjin Key Laboratory of Cellular and Molecular Immunology, Key Laboratory of Immune Microenvironment and Disease (Ministry of Education), Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin 300070, China
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Capital Medical University, Beijing 100069, China
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30
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Cheon S, Dean M, Chahrour M. The ubiquitin proteasome pathway in neuropsychiatric disorders. Neurobiol Learn Mem 2018; 165:106791. [PMID: 29398581 DOI: 10.1016/j.nlm.2018.01.012] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Revised: 01/19/2018] [Accepted: 01/26/2018] [Indexed: 12/20/2022]
Abstract
The ubiquitin proteasome system (UPS) is a highly conserved pathway that tightly regulates protein turnover in cells. This process is integral to neuronal development, differentiation, and function. Several members of the UPS are disrupted in neuropsychiatric disorders, highlighting the importance of this pathway in brain development and function. In this review, we discuss some of these pathway members, the molecular processes they regulate, and the potential for targeting the UPS in an effort to develop therapeutic strategies in neuropsychiatric and neurodevelopmental disorders.
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Affiliation(s)
- Solmi Cheon
- Eugene McDermott Center for Human Growth and Development, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Milan Dean
- Eugene McDermott Center for Human Growth and Development, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Maria Chahrour
- Eugene McDermott Center for Human Growth and Development, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA; Departments of Neuroscience and Psychiatry, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA.
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31
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Functional analysis of Cullin 3 E3 ligases in tumorigenesis. Biochim Biophys Acta Rev Cancer 2017; 1869:11-28. [PMID: 29128526 DOI: 10.1016/j.bbcan.2017.11.001] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2017] [Revised: 11/06/2017] [Accepted: 11/06/2017] [Indexed: 12/14/2022]
Abstract
Cullin 3-RING ligases (CRL3) play pivotal roles in the regulation of various physiological and pathological processes, including neoplastic events. The substrate adaptors of CRL3 typically contain a BTB domain that mediates the interaction between Cullin 3 and target substrates to promote their ubiquitination and subsequent degradation. The biological implications of CRL3 adaptor proteins have been well described where they have been found to play a role as either an oncogene, tumor suppressor, or can mediate either of these effects in a context-dependent manner. Among the extensively studied CRL3-based E3 ligases, the role of the adaptor protein SPOP (speckle type BTB/POZ protein) in tumorigenesis appears to be tissue or cellular context dependent. Specifically, SPOP acts as a tumor suppressor via destabilizing downstream oncoproteins in many malignancies, especially in prostate cancer. However, SPOP has largely an oncogenic role in kidney cancer. Keap1, another well-characterized CRL3 adaptor protein, likely serves as a tumor suppressor within diverse malignancies, mainly due to its specific turnover of its downstream oncogenic substrate, NRF2 (nuclear factor erythroid 2-related factor 2). In accordance with the physiological role the various CRL3 adaptors exhibit, several pharmacological agents have been developed to disrupt its E3 ligase activity, therefore blocking its potential oncogenic activity to mitigate tumorigenesis.
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32
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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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33
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Li Q, Cui M, Yang F, Li N, Jiang B, Yu Z, Zhang D, Wang Y, Zhu X, Hu H, Li PS, Ning SL, Wang S, Qi H, Song H, He D, Lin A, Zhang J, Liu F, Zhao J, Gao L, Yi F, Xue T, Sun JP, Gong Y, Yu X. A cullin 4B-RING E3 ligase complex fine-tunes pancreatic δ cell paracrine interactions. J Clin Invest 2017; 127:2631-2646. [PMID: 28604389 DOI: 10.1172/jci91348] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2016] [Accepted: 04/20/2017] [Indexed: 12/24/2022] Open
Abstract
Somatostatin secreted by pancreatic δ cells mediates important paracrine interactions in Langerhans islets, including maintenance of glucose metabolism through the control of reciprocal insulin and glucagon secretion. Disruption of this circuit contributes to the development of diabetes. However, the precise mechanisms that control somatostatin secretion from islets remain elusive. Here, we found that a super-complex comprising the cullin 4B-RING E3 ligase (CRL4B) and polycomb repressive complex 2 (PRC2) epigenetically regulates somatostatin secretion in islets. Constitutive ablation of CUL4B, the core component of the CRL4B-PRC2 complex, in δ cells impaired glucose tolerance and decreased insulin secretion through enhanced somatostatin release. Moreover, mechanistic studies showed that the CRL4B-PRC2 complex, under the control of the δ cell-specific transcription factor hematopoietically expressed homeobox (HHEX), determines the levels of intracellular calcium and cAMP through histone posttranslational modifications, thereby altering expression of the Cav1.2 calcium channel and adenylyl cyclase 6 (AC6) and modulating somatostatin secretion. In response to high glucose levels or urocortin 3 (UCN3) stimulation, increased expression of cullin 4B (CUL4B) and the PRC2 subunit histone-lysine N-methyltransferase EZH2 and reciprocal decreases in Cav1.2 and AC6 expression were found to regulate somatostatin secretion. Our results reveal an epigenetic regulatory mechanism of δ cell paracrine interactions in which CRL4B-PRC2 complexes, Cav1.2, and AC6 expression fine-tune somatostatin secretion and facilitate glucose homeostasis in pancreatic islets.
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Affiliation(s)
- Qing Li
- Key Laboratory Experimental Teratology of the Ministry of Education and Department of Physiology
| | - Min Cui
- Key Laboratory Experimental Teratology of the Ministry of Education and Department of Physiology
| | - Fan Yang
- Key Laboratory Experimental Teratology of the Ministry of Education and Department of Physiology
| | - Na Li
- Key Laboratory Experimental Teratology of the Ministry of Education and Department of Physiology
| | - Baichun Jiang
- Key Laboratory Experimental Teratology of the Ministry of Education and Department of Genetics, and
| | - Zhen Yu
- Key Laboratory Experimental Teratology of the Ministry of Education and Department of Physiology
| | - Daolai Zhang
- Department of Biochemistry, Shandong University School of Medicine, Jinan, Shandong, China
| | - Yijing Wang
- Department of Biochemistry, Shandong University School of Medicine, Jinan, Shandong, China
| | - Xibin Zhu
- Key Laboratory Experimental Teratology of the Ministry of Education and Department of Physiology
| | - Huili Hu
- Key Laboratory Experimental Teratology of the Ministry of Education and Department of Genetics, and
| | - Pei-Shan Li
- Key Laboratory Experimental Teratology of the Ministry of Education and Department of Genetics, and
| | - Shang-Lei Ning
- Department of Biochemistry, Shandong University School of Medicine, Jinan, Shandong, China
| | - Si Wang
- Key Laboratory Experimental Teratology of the Ministry of Education and Department of Physiology
| | - Haibo Qi
- Key Laboratory Experimental Teratology of the Ministry of Education and Department of Physiology
| | - Hechen Song
- Key Laboratory Experimental Teratology of the Ministry of Education and Department of Physiology
| | - Dongfang He
- Key Laboratory Experimental Teratology of the Ministry of Education and Department of Physiology.,Department of Biochemistry, Shandong University School of Medicine, Jinan, Shandong, China
| | - Amy Lin
- Duke University, School of Medicine, Durham, North Carolina, USA
| | - Jingjing Zhang
- The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Feng Liu
- The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Jiajun Zhao
- Department of Endocrinology, Shandong Provincial Hospital affiliated to Shandong University, Jinan, China
| | - Ling Gao
- Department of Endocrinology, Shandong Provincial Hospital affiliated to Shandong University, Jinan, China
| | - Fan Yi
- Department of Pharmacology, Shandong University School of Medicine, Jinan, Shandong, China
| | - Tian Xue
- Hefei National Laboratory for Physical Science at Microscale, School of Life Science, University of Science and Technology of China, Hefei, Anhui, China
| | - Jin-Peng Sun
- Department of Biochemistry, Shandong University School of Medicine, Jinan, Shandong, China.,Duke University, School of Medicine, Durham, North Carolina, USA
| | - Yaoqin Gong
- Key Laboratory Experimental Teratology of the Ministry of Education and Department of Genetics, and
| | - Xiao Yu
- Key Laboratory Experimental Teratology of the Ministry of Education and Department of Physiology
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34
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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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35
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Li P, Song Y, Zan W, Qin L, Han S, Jiang B, Dou H, Shao C, Gong Y. Lack of CUL4B in Adipocytes Promotes PPARγ-Mediated Adipose Tissue Expansion and Insulin Sensitivity. Diabetes 2017; 66:300-313. [PMID: 27899484 DOI: 10.2337/db16-0743] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Accepted: 11/05/2016] [Indexed: 11/13/2022]
Abstract
Obesity and obesity-associated diseases are linked to dysregulation of the peroxisome proliferator-activated receptor γ (PPARγ) signaling pathway. Identification of the factors that regulate PPARγ expression and activity is crucial for combating obesity. However, the ubiquitin E3 ligases that target PPARγ for proteasomal degradation have been rarely identified, and their functions in vivo have not been characterized. Here we report that CUL4B-RING E3 ligase (CRL4B) negatively regulates PPARγ by promoting its polyubiquitination and proteasomal degradation. Depletion of CUL4B led to upregulation of PPARγ-regulated genes and facilitated adipogenesis. Adipocyte-specific Cul4b knockout (AKO) mice being fed a high-fat diet exhibited increased body fat accumulation that was mediated by increased adipogenesis. However, AKO mice showed improved metabolic phenotypes, including increased insulin sensitivity and glucose tolerance. Correspondingly, there was a decreased inflammatory response in adipose tissues of AKO mice. Genetic inhibition of CUL4B thus appears to phenocopy the beneficial effects of PPARγ agonists. Collectively, this study establishes a critical role of CRL4B in the regulation of PPARγ stability and insulin sensitivity and suggests that CUL4B could be a potential therapeutic target for combating obesity and metabolic syndromes.
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Affiliation(s)
- Peishan Li
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, Shandong, People's Republic of China
| | - Yu Song
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, Shandong, People's Republic of China
| | - Wenying Zan
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, Shandong, People's Republic of China
| | - Liping Qin
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, Shandong, People's Republic of China
| | - Shuang Han
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, Shandong, People's Republic of China
| | - Baichun Jiang
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, Shandong, People's Republic of China
| | - Hao Dou
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, Shandong, People's Republic of China
| | - Changshun Shao
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, Shandong, People's Republic of China
| | - Yaoqin Gong
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, Shandong, People's Republic of China
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Isaac SM, Qu D, Adamson SL. Effect of selective fetectomy on morphology of the mouse placenta. Placenta 2016; 46:11-17. [PMID: 27697216 DOI: 10.1016/j.placenta.2016.07.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/13/2015] [Revised: 06/28/2016] [Accepted: 07/05/2016] [Indexed: 12/21/2022]
Abstract
INTRODUCTION Placental examination is recommended when genetic mutations cause fetal lethality in mice. But how fetal death alters histomorphology of the surviving mouse placenta is not known. METHODS Placentas were examined at E17.5 after fetectomy of 1-2 fetal mice per pregnancy at either embryonic day (E) 15.5 (N = 8; Fx-2 group) or E13.5 (N = 5; Fx-4 group), which left 12 ± 2 surviving fetuses per litter. RESULTS Fetectomy caused no changes in placental weights and no increases in placental hypoxia (pimonidazole staining). The size and cell morphology of the decidua and junctional zone regions were unchanged and, in the Fx-2 group, these regions became significantly less hypoxic. Significant changes in labyrinth volume included a 30% increase in the Fx-2 group and in both groups, a >50% decrease in % fetal blood space and >40% increase in % labyrinth tissue. Maternal blood sinusoid volume was unchanged. Cell death in the labyrinth was significantly increased (22-fold increase in TUNEL staining) whereas placental mRNA expression of the proliferation marker Mki67 was unchanged. mRNA expression of sFlt1 and Prl3b1 (mPL-II) was unchanged in the labyrinth and junctional zone tissues in the Fx-2 group and in whole placental tissue in the Fx-4 group. DISCUSSION Placental examination of the junctional zone and decidual regions after spontaneous fetal death in late gestation is likely to yield useful phenotypic information and abnormalities that may contribute to fetal death. In contrast, labyrinth abnormalities including increased tissue volume and reduced fetoplacental vascularity may not be due to genetic perturbation nor predate fetal death.
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Affiliation(s)
- Sarah M Isaac
- Departments of Physiology, and Obstetrics and Gynaecology, University of Toronto, Toronto, ON, Canada; Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Toronto, ON, Canada
| | - Dawei Qu
- Departments of Physiology, and Obstetrics and Gynaecology, University of Toronto, Toronto, ON, Canada; Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Toronto, ON, Canada
| | - S Lee Adamson
- Departments of Physiology, and Obstetrics and Gynaecology, University of Toronto, Toronto, ON, Canada; Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Toronto, ON, Canada.
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Zhang C, Hou D, Wei H, Zhao M, Yang L, Liu Q, Zhang X, Gong Y, Shao C. Lack of interferon-γ receptor results in a microenvironment favorable for intestinal tumorigenesis. Oncotarget 2016; 7:42099-42109. [PMID: 27286456 PMCID: PMC5173119 DOI: 10.18632/oncotarget.9867] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2016] [Accepted: 05/08/2016] [Indexed: 01/02/2023] Open
Abstract
IFN-γ plays an important role in innate and adaptive immunity. IFN-γ signaling is also involved in tumorigenesis, with both pro- and antitumor activities documented. We here report the characterization of intestinal tumorigenesis in ApcMin/+ mice that lack IFN-γ receptor. We observed that Ifngr1-/-ApcMin/+ mice are shorter-lived than Ifngr1+/+ApcMin/+ mice. The tumors in Ifngr1-/-ApcMin/+ mice are more likely to progress into invasive adenocarcinomas. Gene expression profiling by RNA sequencing revealed a significant upregulation of genes involved in inflammation and tissue remodeling in tumors of Ifngr1-/-ApcMin/+ mice when compared to those in Ifngr1+/+ApcMin/+ mice. In particular, five genes encoding matrix metallopeptidases (MMPs) were among the upregulated. On the other hand, genes that promote or maintain intestinal differentiation, such as Cdx2, Cdhr2 and Cdhr5, were downregulated. Tumor-associated macrophages were more abundant and were more favored toward M2 polarization in Ifngr1-/-ApcMin/+ mice than in Ifngr1+/+ApcMin/+ mice. Furthermore, the Ifngr1 was significantly downregulated in intestinal tumors when compared to mucosa. A similar trend was noted for human colorectal carcinomas. Together, our results indicate that adequate IFN-γ signaling is critical for maintaining a tumor-prohibitive microenvironment.
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Affiliation(s)
- Caibo Zhang
- Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, Shandong, 250012, China
- Department of Life Sciences, Qilu Normal University, Jinan, Shandong, 250013, China
| | - Dong Hou
- Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, Shandong, 250012, China
| | - Haifeng Wei
- First Clinical Medical College, Shandong University of Traditional Chinese Medicine, Jinan, Shandong, 250012, China
| | - Minnan Zhao
- Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, Shandong, 250012, China
| | - Lin Yang
- Huaiyin People's Hospital, Jinan, Shandong, 250021, China
| | - Qiao Liu
- Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, Shandong, 250012, China
| | - Xiyu Zhang
- Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, Shandong, 250012, China
| | - Yaoqin Gong
- Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, Shandong, 250012, China
| | - Changshun Shao
- Key Laboratory of Experimental Teratology, Ministry of Education and Department of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, Shandong, 250012, China
- Department of Genetics/Human Genetics Institute of New Jersey, Piscataway, NJ, 08854, USA
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Yuan J, Jiang B, Zhang A, Qian Y, Tan H, Gao J, Shao C, Gong Y. Accelerated hepatocellular carcinoma development in CUL4B transgenic mice. Oncotarget 2016; 6:15209-21. [PMID: 25945838 PMCID: PMC4558146 DOI: 10.18632/oncotarget.3829] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2015] [Accepted: 03/26/2015] [Indexed: 01/08/2023] Open
Abstract
Cullin 4B (CUL4B) is a component of the Cullin 4B-Ring E3 ligase (CRL4B) complex that functions in proteolysis and in epigenetic regulation. CUL4B possesses tumor-promoting properties and is markedly upregulated in many types of human cancers. To determine the role of CUL4B in liver tumorigenesis, we generated transgenic mice that expressed human CUL4B in livers and other tissues and evaluated the development of spontaneous and chemically-induced hepatocellular carcinomas. We observed that CUL4B transgenic mice spontaneously developed liver tumors at a high incidence at old ages and exhibited enhanced DEN-induced hepatocarcinogenesis. There was a high proliferation rate in the livers of CUL4B transgenic mice that was accompanied by increased levels of Cdk1, Cdk4 and cyclin D1 and decreased level of p16. The transgenic mice also exhibited increased compensatory proliferation after DEN-induced liver injury, which was accompanied by activation of Akt, Erk, p38 and NF-κB. We also found that Prdx3 was downregulated and that DEN induced a higher level of reactive oxygen species in the livers of transgenic mice. Together, our results demonstrate a critical role of CUL4B in hepatocarcinogenesis in mice.
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Affiliation(s)
- Jupeng Yuan
- Key Laboratory of Experimental Teratology, Ministry of Education, Institute of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, China
| | - Baichun Jiang
- Key Laboratory of Experimental Teratology, Ministry of Education, Institute of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, China
| | - Aizhen Zhang
- Key Laboratory of Experimental Teratology, Ministry of Education, Shandong University School of Life Science, Jinan, China
| | - Yanyan Qian
- Key Laboratory of Experimental Teratology, Ministry of Education, Institute of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, China
| | - Haining Tan
- Key Laboratory of Experimental Teratology, Ministry of Education, Institute of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, China
| | - Jiangang Gao
- Key Laboratory of Experimental Teratology, Ministry of Education, Shandong University School of Life Science, Jinan, China
| | - Changshun Shao
- Key Laboratory of Experimental Teratology, Ministry of Education, Institute of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, China
| | - Yaoqin Gong
- Key Laboratory of Experimental Teratology, Ministry of Education, Institute of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, China
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Zha Z, Han XR, Smith MD, Lei QY, Guan KL, Xiong Y. Hypertension-associated C825T polymorphism impairs the function of Gβ3 to target GRK2 ubiquitination. Cell Discov 2016; 2:16005. [PMID: 27462452 PMCID: PMC4849471 DOI: 10.1038/celldisc.2016.5] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2015] [Accepted: 02/08/2016] [Indexed: 01/08/2023] Open
Abstract
Population-based and case-control studies in different ethnicities have linked a polymorphism, C825T, in exon 10 of GNB3 gene to hypertension and several additional diseases. The 825T allele is associated with alternative splicing and results in a shortened Gβ3 protein, referred to as Gβ3s, which loses 41 amino acids encompassing one WD40 repeat domain. The mechanism of how Gβ3 C825T polymorphism is associated with hypertension has remained unclear, but an impairment of its canonical function in G-protein-coupled receptor signaling has been ruled out. Here, we report that Gβ3, like other Gβ proteins, binds to DDB1 and assembles a DDB1-CUL4A-ROC1 E3 ubiquitin ligase (CRL4A(Gβ3)) to target GRK2 ubiquitination. The loss of the 41 amino-acid residues disrupts the Gβ3-DDB1 binding and impairs the function of Gβ3s to ubiquitinate GRK2. GRK2 ubiquitination levels were decreased and protein levels were accumulated in the blood samples of Gβ3 825T allele carriers. Deletion of Cul4a in mice resulted in systolic pressure increased and weakened heart function in male mice that can be partially rescued by the deletion of one Grk2 allele. These results reveal a mechanism explaining the link between Gβ3 C825T polymorphism and hypertension.
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Affiliation(s)
- Zhengyu Zha
- Key Laboratory of Molecular Medicine, Ministry of Education, and Department of Biochemistry and Molecular Biology, Fudan University Shanghai Medical College, Shanghai, China
- Molecular and Cell Biology Lab, Institutes of Biomedical Sciences, Fudan University, Shanghai, China
- School of Life Sciences, Fudan University, Shanghai, China
- Department of Biochemistry and Biophysics, Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Xiao-Ran Han
- Key Laboratory of Molecular Medicine, Ministry of Education, and Department of Biochemistry and Molecular Biology, Fudan University Shanghai Medical College, Shanghai, China
- Molecular and Cell Biology Lab, Institutes of Biomedical Sciences, Fudan University, Shanghai, China
- School of Life Sciences, Fudan University, Shanghai, China
| | - Matthew D Smith
- Department of Biochemistry and Biophysics, Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Qun-Ying Lei
- Key Laboratory of Molecular Medicine, Ministry of Education, and Department of Biochemistry and Molecular Biology, Fudan University Shanghai Medical College, Shanghai, China
| | - Kun-Liang Guan
- Key Laboratory of Molecular Medicine, Ministry of Education, and Department of Biochemistry and Molecular Biology, Fudan University Shanghai Medical College, Shanghai, China
- Molecular and Cell Biology Lab, Institutes of Biomedical Sciences, Fudan University, Shanghai, China
- Department of Pharmacology and Moores Cancer Center, University of California at San Diego, La Jolla, CA, USA
| | - Yue Xiong
- Key Laboratory of Molecular Medicine, Ministry of Education, and Department of Biochemistry and Molecular Biology, Fudan University Shanghai Medical College, Shanghai, China
- Molecular and Cell Biology Lab, Institutes of Biomedical Sciences, Fudan University, Shanghai, China
- Department of Biochemistry and Biophysics, Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
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Human X-linked Intellectual Disability Factor CUL4B Is Required for Post-meiotic Sperm Development and Male Fertility. Sci Rep 2016; 6:20227. [PMID: 26832838 PMCID: PMC4735749 DOI: 10.1038/srep20227] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2015] [Accepted: 12/23/2015] [Indexed: 01/21/2023] Open
Abstract
In this study, we demonstrate that an E3-ubiquitin ligase associated with human X-linked intellectual disability, CUL4B, plays a crucial role in post-meiotic sperm development. Initially, Cul4b(Δ)/Y male mice were found to be sterile and exhibited a progressive loss in germ cells, thereby leading to oligoasthenospermia. Adult Cul4b mutant epididymides also contained very low numbers of mature spermatozoa, and these spermatazoa exhibited pronounced morphological abnormalities. In post-meiotic spermatids, CUL4B was dynamically expressed and mitosis of spermatogonia and meiosis of spermatocytes both appeared unaffected. However, the spermatids exhibited significantly higher levels of apoptosis during spermiogenesis, particularly during the acrosome phase through the cap phase. Comparative proteomic analyses identified a large-scale shift between wild-type and Cul4b mutant testes during early post-meiotic sperm development. Ultrastructural pathology studies further detected aberrant acrosomes in spermatids and nuclear morphology. The protein levels of both canonical and non-canonical histones were also affected in an early spermatid stage in the absence of Cul4b. Thus, X-linked CUL4B appears to play a critical role in acrosomal formation, nuclear condensation, and in regulating histone dynamics during haploid male germ cell differentiation in relation to male fertility in mice. Thus, it is possible that CUL4B-selective substrates are required for post-meiotic sperm morphogenesis.
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Cell-fate determination by ubiquitin-dependent regulation of translation. Nature 2015; 525:523-7. [PMID: 26399832 PMCID: PMC4602398 DOI: 10.1038/nature14978] [Citation(s) in RCA: 121] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2015] [Accepted: 07/24/2015] [Indexed: 02/06/2023]
Abstract
Metazoan development depends on accurate execution of differentiation programs that allow pluripotent stem cells to adopt specific fates 1. Differentiation requires changes to chromatin architecture and transcriptional networks, yet whether other regulatory events support cell fate determination is less well understood. Here, we have identified the vertebrate-specific ubiquitin ligase CUL3KBTBD8 as an essential regulator of neural crest specification. CUL3KBTBD8 monoubiquitylates NOLC1 and its paralog TCOF1, whose mutation underlies the neurocristopathy Treacher Collins Syndrome 2,3. Ubiquitylation drives formation of a TCOF1-NOLC1 platform that connects RNA polymerase I with ribosome modification enzymes and remodels the translational program of differentiating cells in favor of neural crest specification. We conclude that ubiquitin-dependent regulation of translation is an important feature of cell fate determination.
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Qian Y, Yuan J, Hu H, Yang Q, Li J, Zhang S, Jiang B, Shao C, Gong Y. The CUL4B/AKT/β-Catenin Axis Restricts the Accumulation of Myeloid-Derived Suppressor Cells to Prohibit the Establishment of a Tumor-Permissive Microenvironment. Cancer Res 2015; 75:5070-83. [PMID: 26450912 DOI: 10.1158/0008-5472.can-15-0898] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2015] [Accepted: 09/08/2015] [Indexed: 11/16/2022]
Abstract
Cancer progression requires a permissive microenvironment that shields cancer from the host immunosurveillance. The presence of myeloid-derived suppressor cells (MDSC) is a key feature of a tumor-permissive microenvironment. Cullin 4B (CUL4B), a scaffold protein in the Cullin 4B-RING E3 ligase complex (CRL4B), represses tumor suppressors through diverse epigenetic mechanisms and is overexpressed in many malignancies. We report here that CUL4B unexpectedly functions as a negative regulator of MDSC functions in multiple tumor settings. Conditional ablation of CUL4B in the hematopoietic system, driven by Tek-Cre, resulted in significantly enhanced accumulation and activity of MDSCs. Mechanistically, we demonstrate that the aberrant abundance of MDSCs in the absence of CUL4B was mediated by the downregulation of the AKT/β-catenin pathway. Moreover, CUL4B repressed the phosphatases PP2A and PHLPP1/2 that dephosphorylate and inactivate AKT to sustain pathway activation. Importantly, the CUL4B/AKT/β-catenin axis was downregulated in MDSCs of healthy individuals and was further suppressed in tumor-bearing mice and cancer patients. Thus, our findings point to a pro- and antitumorigenic role for CUL4B in malignancy, in which its ability to impede the formation of a tumor-supportive microenvironment may be context-specific.
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Affiliation(s)
- Yanyan Qian
- Key Laboratory of Experimental Teratology, Ministry of Education/Institute of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, China
| | - Jupeng Yuan
- Key Laboratory of Experimental Teratology, Ministry of Education/Institute of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, China
| | - Huili Hu
- Key Laboratory of Experimental Teratology, Ministry of Education/Institute of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, China
| | - Qifeng Yang
- Department of Breast Surgery, Qilu Hospital, Shandong University, Jinan, China
| | - Jisheng Li
- Department of Medical Oncology, Cancer Center, Qilu Hospital, Shandong University, Jinan, China
| | - Shuqian Zhang
- Key Laboratory of Experimental Teratology, Ministry of Education/Institute of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, China
| | - Baichun Jiang
- Key Laboratory of Experimental Teratology, Ministry of Education/Institute of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, China
| | - Changshun Shao
- Key Laboratory of Experimental Teratology, Ministry of Education/Institute of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, China.
| | - Yaoqin Gong
- Key Laboratory of Experimental Teratology, Ministry of Education/Institute of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, China.
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Hannah J, Zhou P. Distinct and overlapping functions of the cullin E3 ligase scaffolding proteins CUL4A and CUL4B. Gene 2015; 573:33-45. [PMID: 26344709 DOI: 10.1016/j.gene.2015.08.064] [Citation(s) in RCA: 75] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2015] [Revised: 08/03/2015] [Accepted: 08/27/2015] [Indexed: 01/29/2023]
Abstract
The cullin 4 subfamily of genes includes CUL4A and CUL4B, which share a mostly identical amino acid sequence aside from the elongated N-terminal region in CUL4B. Both act as scaffolding proteins for modular cullin RING ligase 4 (CRL4) complexes which promote the ubiquitination of a variety of substrates. CRL4 function is vital to cells as loss of both genes or their shared substrate adaptor protein DDB1 halts proliferation and eventually leads to cell death. Due to their high structural similarity, CUL4A and CUL4B share a substantial overlap in function. However, in some cases, differences in subcellular localization, spatiotemporal expression patterns and stress-inducibility preclude functional compensation. In this review, we highlight the most essential functions of the CUL4 genes in: DNA repair and replication, chromatin-remodeling, cell cycle regulation, embryogenesis, hematopoiesis and spermatogenesis. CUL4 genes are also clinically relevant as dysregulation can contribute to the onset of cancer and CRL4 complexes are often hijacked by certain viruses to promote viral replication and survival. Also, mutations in CUL4B have been implicated in a subset of patients suffering from syndromic X-linked intellectual disability (AKA mental retardation). Interestingly, the antitumor effects of immunomodulatory drugs are caused by their binding to the CRL4CRBN complex and re-directing the E3 ligase towards the Ikaros transcription factors IKZF1 and IKZF3. Because of their influence over key cellular functions and relevance to human disease, CRL4s are considered promising targets for therapeutic intervention.
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Affiliation(s)
- Jeffrey Hannah
- Department of Pathology, Weill Cornell Medical College, 1300 York Ave. NY, NY 10065, United States.
| | - Pengbo Zhou
- Department of Pathology, Weill Cornell Medical College, 1300 York Ave. NY, NY 10065, United States.
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Locke MEO, Milojevic M, Eitutis ST, Patel N, Wishart AE, Daley M, Hill KA. Genomic copy number variation in Mus musculus. BMC Genomics 2015; 16:497. [PMID: 26141061 PMCID: PMC4490682 DOI: 10.1186/s12864-015-1713-z] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2014] [Accepted: 06/22/2015] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND Copy number variation is an important dimension of genetic diversity and has implications in development and disease. As an important model organism, the mouse is a prime candidate for copy number variant (CNV) characterization, but this has yet to be completed for a large sample size. Here we report CNV analysis of publicly available, high-density microarray data files for 351 mouse tail samples, including 290 mice that had not been characterized for CNVs previously. RESULTS We found 9634 putative autosomal CNVs across the samples affecting 6.87% of the mouse reference genome. We find significant differences in the degree of CNV uniqueness (single sample occurrence) and the nature of CNV-gene overlap between wild-caught mice and classical laboratory strains. CNV-gene overlap was associated with lipid metabolism, pheromone response and olfaction compared to immunity, carbohydrate metabolism and amino-acid metabolism for wild-caught mice and classical laboratory strains, respectively. Using two subspecies of wild-caught Mus musculus, we identified putative CNVs unique to those subspecies and show this diversity is better captured by wild-derived laboratory strains than by the classical laboratory strains. A total of 9 genic copy number variable regions (CNVRs) were selected for experimental confirmation by droplet digital PCR (ddPCR). CONCLUSION The analysis we present is a comprehensive, genome-wide analysis of CNVs in Mus musculus, which increases the number of known variants in the species and will accelerate the identification of novel variants in future studies.
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Affiliation(s)
- M Elizabeth O Locke
- Department of Computer Science, The University of Western Ontario, London, ON, N6A 5B7, Canada.
| | - Maja Milojevic
- Department of Biology, The University of Western Ontario, Biological and Geological Sciences Building 1151 Richmond St. N, London, ON, N6A 5B7, Canada.
| | - Susan T Eitutis
- Department of Biology, The University of Western Ontario, Biological and Geological Sciences Building 1151 Richmond St. N, London, ON, N6A 5B7, Canada.
| | - Nisha Patel
- Department of Biology, The University of Western Ontario, Biological and Geological Sciences Building 1151 Richmond St. N, London, ON, N6A 5B7, Canada.
| | - Andrea E Wishart
- Department of Biology, The University of Western Ontario, Biological and Geological Sciences Building 1151 Richmond St. N, London, ON, N6A 5B7, Canada.
| | - Mark Daley
- Department of Computer Science, The University of Western Ontario, London, ON, N6A 5B7, Canada.
- Department of Biology, The University of Western Ontario, Biological and Geological Sciences Building 1151 Richmond St. N, London, ON, N6A 5B7, Canada.
| | - Kathleen A Hill
- Department of Computer Science, The University of Western Ontario, London, ON, N6A 5B7, Canada.
- Department of Biology, The University of Western Ontario, Biological and Geological Sciences Building 1151 Richmond St. N, London, ON, N6A 5B7, Canada.
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Zhao W, Jiang B, Hu H, Zhang S, Lv S, Yuan J, Qian Y, Zou Y, Li X, Jiang H, Liu F, Shao C, Gong Y. Lack of CUL4B leads to increased abundance of GFAP-positive cells that is mediated by PTGDS in mouse brain. Hum Mol Genet 2015; 24:4686-97. [PMID: 26025376 DOI: 10.1093/hmg/ddv200] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2015] [Accepted: 05/26/2015] [Indexed: 01/05/2023] Open
Abstract
Astrocytes are the most abundant cell type in the mammalian brain and are important for the functions of the central nervous system. Glial fibrillary acidic protein (GFAP) is regarded as a hallmark of mature astrocytes, though some GFPA-positive cells may act as neural stem cells. Missense heterozygous mutations in GFAP cause Alexander disease that manifests leukodystrophy and intellectual disability. Here, we show that CUL4B, a scaffold protein that assembles E3 ubiquitin ligase, represses the expression of GFAP in neural progenitor cells (NPCs) during brain development. Lack of Cul4b in NPCs in cultures led to increased generation of astrocytes, marked by GFAP and S100β. The GFAP+ cells were also found to be more abundant in the brains of nervous system-specific Cul4b knockout mice in vivo. Moreover, we demonstrated that the increased generation of GFAP+ cells from Cul4b-null NPCs was mediated by an upregulation of prostaglandin D2 synthase PTGDS. We showed that the increased GFAP expression can be attenuated by pharmacological inhibition of the PTGDS enzymatic activity or by shRNA-mediated knockdown of Ptgds. Importantly, exogenously added PTGDS could promote the generation of GFAP+ cells from wild-type NPCs. We further observed that Ptgds is targeted and repressed by the CUL4B/PRC2 complex. Together, our results demonstrate CUL4B as a negative regulator of GFAP expression during neural development.
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Affiliation(s)
- Wei Zhao
- The Key Laboratory of Experimental Teratology, Ministry of Education and Institute of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, Shandong 250012, China
| | - Baichun Jiang
- The Key Laboratory of Experimental Teratology, Ministry of Education and Institute of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, Shandong 250012, China
| | - Huili Hu
- The Key Laboratory of Experimental Teratology, Ministry of Education and Institute of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, Shandong 250012, China
| | - Shuqian Zhang
- The Key Laboratory of Experimental Teratology, Ministry of Education and Institute of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, Shandong 250012, China
| | - Shuaishuai Lv
- The Key Laboratory of Experimental Teratology, Ministry of Education and Institute of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, Shandong 250012, China
| | - Jupeng Yuan
- The Key Laboratory of Experimental Teratology, Ministry of Education and Institute of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, Shandong 250012, China
| | - Yanyan Qian
- The Key Laboratory of Experimental Teratology, Ministry of Education and Institute of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, Shandong 250012, China
| | - Yongxin Zou
- The Key Laboratory of Experimental Teratology, Ministry of Education and Institute of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, Shandong 250012, China
| | - Xi Li
- The Key Laboratory of Experimental Teratology, Ministry of Education and Institute of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, Shandong 250012, China
| | - Hong Jiang
- Institute of Medical Psychology, Shandong University School of Medicine, Jinan, Shandong 250012, China and
| | - Fang Liu
- Department of Neuroscience, Centre for Addiction and Mental Health, Toronto, Ontario, Canada M5T 1R8
| | - Changshun Shao
- The Key Laboratory of Experimental Teratology, Ministry of Education and Institute of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, Shandong 250012, China,
| | - Yaoqin Gong
- The Key Laboratory of Experimental Teratology, Ministry of Education and Institute of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, Shandong 250012, China,
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46
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Zha Z, Han X, Smith MD, Liu Y, Giguère PM, Kopanja D, Raychaudhuri P, Siderovski DP, Guan KL, Lei QY, Xiong Y. A Non-Canonical Function of Gβ as a Subunit of E3 Ligase in Targeting GRK2 Ubiquitylation. Mol Cell 2015; 58:794-803. [PMID: 25982117 DOI: 10.1016/j.molcel.2015.04.017] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2014] [Revised: 02/17/2015] [Accepted: 04/09/2015] [Indexed: 01/08/2023]
Abstract
G protein-coupled receptors (GPCRs) comprise the largest family of cell surface receptors, regulate a wide range of physiological processes, and are the major targets of pharmaceutical drugs. Canonical signaling from GPCRs is relayed to intracellular effector proteins by trimeric G proteins, composed of α, β, and γ subunits (Gαβγ). Here, we report that G protein β subunits (Gβ) bind to DDB1 and that Gβ2 targets GRK2 for ubiquitylation by the DDB1-CUL4A-ROC1 ubiquitin ligase. Activation of GPCR results in PKA-mediated phosphorylation of DDB1 at Ser645 and its dissociation from Gβ2, leading to increase of GRK2 protein. Deletion of Cul4a results in cardiac hypertrophy in male mice that can be partially rescued by the deletion of one Grk2 allele. These results reveal a non-canonical function of the Gβ protein as a ubiquitin ligase component and a mechanism of feedback regulation of GPCR signaling.
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Affiliation(s)
- Zhengyu Zha
- Key Laboratory of Molecular Medicine, Ministry of Education, and Department of Biochemistry and Molecular Biology, Fudan University Shanghai Medical College, Shanghai 200032, People's Republic of China; Molecular and Cell Biology Lab, Institutes of Biomedical Sciences, Fudan University, Shanghai 200032, People's Republic of China; School of Life Sciences, Fudan University 200032, People's Republic of China; Department of Biochemistry and Biophysics, Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, Chapel Hill, NC 27599, USA
| | - Xiaoran Han
- Key Laboratory of Molecular Medicine, Ministry of Education, and Department of Biochemistry and Molecular Biology, Fudan University Shanghai Medical College, Shanghai 200032, People's Republic of China; Molecular and Cell Biology Lab, Institutes of Biomedical Sciences, Fudan University, Shanghai 200032, People's Republic of China; School of Life Sciences, Fudan University 200032, People's Republic of China
| | - Matthew D Smith
- Department of Biochemistry and Biophysics, Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, Chapel Hill, NC 27599, USA
| | - Yang Liu
- Department of Biochemistry and Biophysics, Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, Chapel Hill, NC 27599, USA
| | - Patrick M Giguère
- Department of Pharmacology, University of North Carolina, Chapel Hill, Chapel Hill, NC 27599, USA
| | - Dragana Kopanja
- Department of Biochemistry and Molecular Genetics, University of Illinois, College of Medicine, Chicago, IL 60607, USA
| | - Pradip Raychaudhuri
- Department of Biochemistry and Molecular Genetics, University of Illinois, College of Medicine, Chicago, IL 60607, USA
| | - David P Siderovski
- Department of Pharmacology, University of North Carolina, Chapel Hill, Chapel Hill, NC 27599, USA
| | - Kun-Liang Guan
- Key Laboratory of Molecular Medicine, Ministry of Education, and Department of Biochemistry and Molecular Biology, Fudan University Shanghai Medical College, Shanghai 200032, People's Republic of China; Molecular and Cell Biology Lab, Institutes of Biomedical Sciences, Fudan University, Shanghai 200032, People's Republic of China; Department of Pharmacology and Moores Cancer Center, University of California, San Diego, La Jolla, CA 92093, USA.
| | - Qun-Ying Lei
- Key Laboratory of Molecular Medicine, Ministry of Education, and Department of Biochemistry and Molecular Biology, Fudan University Shanghai Medical College, Shanghai 200032, People's Republic of China; Molecular and Cell Biology Lab, Institutes of Biomedical Sciences, Fudan University, Shanghai 200032, People's Republic of China.
| | - Yue Xiong
- Key Laboratory of Molecular Medicine, Ministry of Education, and Department of Biochemistry and Molecular Biology, Fudan University Shanghai Medical College, Shanghai 200032, People's Republic of China; Molecular and Cell Biology Lab, Institutes of Biomedical Sciences, Fudan University, Shanghai 200032, People's Republic of China; Department of Biochemistry and Biophysics, Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, Chapel Hill, NC 27599, USA.
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Wei Z, Guo H, Liu Z, Zhang X, Liu Q, Qian Y, Gong Y, Shao C. CUL4B impedes stress-induced cellular senescence by dampening a p53-reactive oxygen species positive feedback loop. Free Radic Biol Med 2015; 79:1-13. [PMID: 25464270 DOI: 10.1016/j.freeradbiomed.2014.11.010] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/10/2014] [Revised: 11/05/2014] [Accepted: 11/13/2014] [Indexed: 10/24/2022]
Abstract
Tumor suppressor p53 is known to regulate the level of intracellular reactive oxygen species (ROS). It can either alleviate oxidative stress under physiological and mildly stressed conditions or exacerbate oxidative stress under highly stressed conditions. We here report that a p53-ROS positive feedback loop drives a senescence program in normal human fibroblasts (NHFs) and this senescence-driving loop is negatively regulated by CUL4B. CUL4B, which can assemble various ubiquitin E3 ligases, was found to be downregulated in stress-induced senescent cells, but not in replicative senescent cells. We observed that p53-dependent ROS production was significantly augmented and stress-induced senescence was greatly enhanced when CUL4B was absent or depleted. Ectopic expression of CUL4B, on the other hand, blunted p53 activation, reduced ROS production, and attenuated cellular senescence in cells treated with H2O2. CUL4B was shown to promote p53 ubiquitination and proteosomal degradation in NHFs exposed to oxidative stress, thus dampening the p53-dependent cellular senescence. Together, our results established a critical role of CUL4B in negatively regulating the p53-ROS positive feedback loop that drives cellular senescence.
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Affiliation(s)
- Zhao Wei
- Key Laboratory of Experimental Teratology, Ministry of Education/Institute of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, Shandong 250012, China
| | - Haiyang Guo
- Key Laboratory of Experimental Teratology, Ministry of Education/Institute of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, Shandong 250012, China
| | - Zhaojian Liu
- Key Laboratory of Experimental Teratology, Ministry of Education/Institute of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, Shandong 250012, China
| | - Xiyu Zhang
- Key Laboratory of Experimental Teratology, Ministry of Education/Institute of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, Shandong 250012, China
| | - Qiao Liu
- Key Laboratory of Experimental Teratology, Ministry of Education/Institute of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, Shandong 250012, China
| | - Yanyan Qian
- Key Laboratory of Experimental Teratology, Ministry of Education/Institute of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, Shandong 250012, China
| | - Yaoqin Gong
- Key Laboratory of Experimental Teratology, Ministry of Education/Institute of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, Shandong 250012, China
| | - Changshun Shao
- Key Laboratory of Experimental Teratology, Ministry of Education/Institute of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, Shandong 250012, China; Department of Genetics/Human Genetics Institute of New Jersey, Rutgers University, Piscataway, NJ 08854, USA.
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48
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Zhao X, Jiang B, Hu H, Mao F, Mi J, Li Z, Liu Q, Shao C, Gong Y. Zebrafish cul4a, but not cul4b, modulates cardiac and forelimb development by upregulating tbx5a expression. Hum Mol Genet 2014; 24:853-64. [PMID: 25274780 DOI: 10.1093/hmg/ddu503] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
CUL4A and CUL4B are closely related cullin family members and can each assemble a Cullin-RING E3 ligase complex (CRL) and participate in a variety of biological processes. While the CRLs formed by the two cullin members may have common targets, the two appeared to have very different consequences when mutated or disrupted in mammals. We here investigated the roles of cul4a and cul4b during zebrafish embryogenesis by using the morpholino knockdown approach. We found that cul4a is essential for cardiac development as well as for pectoral fin development. Whereas cul4a morphants appeared to be unperturbed in chamber specification, they failed to undergo heart looping. The failures in heart looping and pectoral fin formation in cul4a morphants were accompanied by greatly reduced proliferation of cardiac cells and pectoral fin-forming cells. We demonstrated that tbx5a, a transcription factor essential for heart and limb development, is transcriptionally upregulated by cul4a and mediates the function of cul4a in cardiac and pectoral fin development. In contrast to the critical importance of cul4a, cul4b appeared to be dispensable for zebrafish development and was incapable of compensating for the loss of cul4a. This work provides the first demonstration of an essential role of cul4a, but not cul4b, in cardiac development and in the regulation of tbx5a in zebrafish. These findings justify exploring the functional role of CUL4A in human cardiac development.
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Affiliation(s)
- Xiaohan Zhao
- The Key Laboratory of Experimental Teratology, Ministry of Education and Institute of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, Shandong 250012, China
| | - Baichun Jiang
- The Key Laboratory of Experimental Teratology, Ministry of Education and Institute of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, Shandong 250012, China
| | - Huili Hu
- The Key Laboratory of Experimental Teratology, Ministry of Education and Institute of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, Shandong 250012, China
| | - Fei Mao
- The Key Laboratory of Experimental Teratology, Ministry of Education and Institute of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, Shandong 250012, China
| | - Jun Mi
- The Key Laboratory of Experimental Teratology, Ministry of Education and Institute of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, Shandong 250012, China
| | - Zhaohui Li
- The Key Laboratory of Experimental Teratology, Ministry of Education and Institute of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, Shandong 250012, China
| | - Qiji Liu
- The Key Laboratory of Experimental Teratology, Ministry of Education and Institute of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, Shandong 250012, China
| | - Changshun Shao
- The Key Laboratory of Experimental Teratology, Ministry of Education and Institute of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, Shandong 250012, China
| | - Yaoqin Gong
- The Key Laboratory of Experimental Teratology, Ministry of Education and Institute of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, Shandong 250012, China
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Ji Q, Hu H, Yang F, Yuan J, Yang Y, Jiang L, Qian Y, Jiang B, Zou Y, Wang Y, Shao C, Gong Y. CRL4B interacts with and coordinates the SIN3A-HDAC complex to repress CDKN1A and drive cell cycle progression. J Cell Sci 2014; 127:4679-91. [PMID: 25189618 DOI: 10.1242/jcs.154245] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
Abstract
CUL4B, a scaffold protein that assembles the CRL4B ubiquitin ligase complex, participates in the regulation of a broad spectrum of biological processes. Here, we demonstrate a crucial role of CUL4B in driving cell cycle progression. We show that loss of CUL4B results in a significant reduction in cell proliferation and causes G1 cell cycle arrest, accompanied by the upregulation of the cyclin-dependent kinase (CDK) inhibitors (CKIs) p21 and p57 (encoded by CDKN1A and CDKN1C, respectively). Strikingly, CUL4B was found to negatively regulate the function of p21 through transcriptional repression, but not through proteolysis. Furthermore, we demonstrate that CRL4B and SIN3A-HDAC complexes interact with each other and co-occupy the CDKN1A and CDKN1C promoters. Lack of CUL4B led to a decreased retention of SIN3A-HDAC components and increased levels of acetylated H3 and H4. Interestingly, the ubiquitylation function of CRL4B is not required for the stable retention of SIN3A-HDAC on the promoters of target genes. Thus, in addition to directly contributing to epigenetic silencing by catalyzing H2AK119 monoubiquitylation, CRL4B also facilitates the deacetylation function of SIN3A-HDAC. Our findings reveal a coordinated action between CRL4B and SIN3A-HDAC complexes in transcriptional repression.
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Affiliation(s)
- Qinghong Ji
- Key Laboratory of Experimental Teratology, Ministry of Education, Institute of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, 250012, China
| | - Huili Hu
- Key Laboratory of Experimental Teratology, Ministry of Education, Institute of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, 250012, China
| | - Fan Yang
- Key Laboratory of Experimental Teratology, Ministry of Education, Institute of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, 250012, China
| | - Jupeng Yuan
- Key Laboratory of Experimental Teratology, Ministry of Education, Institute of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, 250012, China
| | - Yang Yang
- Key Laboratory of Experimental Teratology, Ministry of Education, Institute of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, 250012, China
| | - Liangqian Jiang
- Key Laboratory of Experimental Teratology, Ministry of Education, Institute of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, 250012, China
| | - Yanyan Qian
- Key Laboratory of Experimental Teratology, Ministry of Education, Institute of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, 250012, China
| | - Baichun Jiang
- Key Laboratory of Experimental Teratology, Ministry of Education, Institute of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, 250012, China
| | - Yongxin Zou
- Key Laboratory of Experimental Teratology, Ministry of Education, Institute of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, 250012, China
| | - Yan Wang
- Key Laboratory of Experimental Teratology, Ministry of Education, Institute of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, 250012, China
| | - Changshun Shao
- Key Laboratory of Experimental Teratology, Ministry of Education, Institute of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, 250012, China
| | - Yaoqin Gong
- Key Laboratory of Experimental Teratology, Ministry of Education, Institute of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, 250012, China
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50
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Sarkar AA, Nuwayhid SJ, Maynard T, Ghandchi F, Hill JT, Lamantia AS, Zohn IE. Hectd1 is required for development of the junctional zone of the placenta. Dev Biol 2014; 392:368-80. [PMID: 24855001 PMCID: PMC4578812 DOI: 10.1016/j.ydbio.2014.05.007] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2013] [Revised: 05/06/2014] [Accepted: 05/07/2014] [Indexed: 01/17/2023]
Abstract
The placenta plays a critical role in the growth and survival of the fetus. Here we demonstrate that the Homologous to the E6-AP Carboxyl Terminus (HECT) domain E3 ubiquitin ligase, Hectd1, is essential for development of the mouse placenta. Hectd1 is widely expressed during placentation with enrichment in trophoblast giant cells (TGCs) and other trophoblast-derived cell subtypes in the junctional and labyrinth zones of the placenta. Disruption of Hectd1 results in mid-gestation lethality and intrauterine growth restriction (IUGR). Variable defects in the gross structure of the mutant placenta are found including alterations in diameter, thickness and lamination. The number and nuclear size of TGCs is reduced. Examination of subtype specific markers reveals altered TGC development with decreased expression of Placental lactogen-1 and -2 (Pl1 and Pl2) and increased expression of Proliferin (Plf). Reduced numbers of spongiotrophoblasts and glycogen trophoblasts were also found at the junctional zone of the Hectd1 mutant placenta. Finally, there was an increase in immature uterine natural killer (uNK) cells in the maternal decidua of the Hectd1 mutant placenta. Proliferation and apoptosis are differentially altered in the layers of the placenta with an increase in both apoptosis and proliferation in the maternal decidua, a decrease in proliferation and increase in apoptosis in the labyrinth layer and both unchanged in the junctional zone. Together these data demonstrate that Hectd1 is required for development of multiple cell types within the junctional zone of the placenta.
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Affiliation(s)
- Anjali A Sarkar
- Center for Neuroscience Research, Children׳s Research Institute, and Children׳s National Medical Center, Washington, DC 20010, USA
| | - Samer J Nuwayhid
- Center for Neuroscience Research, Children׳s Research Institute, and Children׳s National Medical Center, Washington, DC 20010, USA
| | - Thomas Maynard
- Department of Pharmacology and Physiology, The George Washington Institute for Neuroscience, George Washington University, Washington, DC 20052, USA; The George Washington Institute for Neuroscience, George Washington University, Washington, DC 20052, USA
| | - Frederick Ghandchi
- Center for Neuroscience Research, Children׳s Research Institute, and Children׳s National Medical Center, Washington, DC 20010, USA
| | | | - Anthony S Lamantia
- Department of Pharmacology and Physiology, The George Washington Institute for Neuroscience, George Washington University, Washington, DC 20052, USA; The George Washington Institute for Neuroscience, George Washington University, Washington, DC 20052, USA
| | - Irene E Zohn
- Center for Neuroscience Research, Children׳s Research Institute, and Children׳s National Medical Center, Washington, DC 20010, USA; Department of Pharmacology and Physiology, The George Washington Institute for Neuroscience, George Washington University, Washington, DC 20052, USA; The George Washington Institute for Neuroscience, George Washington University, Washington, DC 20052, USA.
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