1
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Boretto M, Geurts MH, Gandhi S, Ma Z, Staliarova N, Celotti M, Lim S, He GW, Millen R, Driehuis E, Begthel H, Smabers L, Roodhart J, van Es J, Wu W, Clevers H. Epidermal growth factor receptor (EGFR) is a target of the tumor-suppressor E3 ligase FBXW7. Proc Natl Acad Sci U S A 2024; 121:e2309902121. [PMID: 38483988 PMCID: PMC10962967 DOI: 10.1073/pnas.2309902121] [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: 06/12/2023] [Accepted: 01/08/2024] [Indexed: 03/19/2024] Open
Abstract
FBXW7 is an E3 ubiquitin ligase that targets proteins for proteasome-mediated degradation and is mutated in various cancer types. Here, we use CRISPR base editors to introduce different FBXW7 hotspot mutations in human colon organoids. Functionally, FBXW7 mutation reduces EGF dependency of organoid growth by ~10,000-fold. Combined transcriptomic and proteomic analyses revealed increased EGFR protein stability in FBXW7 mutants. Two distinct phosphodegron motifs reside in the cytoplasmic tail of EGFR. Mutations in these phosphodegron motifs occur in human cancer. CRISPR-mediated disruption of the phosphodegron motif at T693 reduced EGFR degradation and EGF growth factor dependency. FBXW7 mutant organoids showed reduced sensitivity to EGFR-MAPK inhibitors. These observations were further strengthened in CRC-derived organoid lines and validated in a cohort of patients treated with panitumumab. Our data imply that FBXW7 mutations reduce EGF dependency by disabling EGFR turnover.
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Affiliation(s)
- Matteo Boretto
- Organoid group, Oncode Institute, Hubrecht Institute, Royal Netherlands Academy of Arts and Sciences and University Medical Center, 3584CTUtrecht, the Netherlands
| | - Maarten H. Geurts
- Organoid group, Oncode Institute, Hubrecht Institute, Royal Netherlands Academy of Arts and Sciences and University Medical Center, 3584CTUtrecht, the Netherlands
| | - Shashank Gandhi
- Organoid group, Oncode Institute, Hubrecht Institute, Royal Netherlands Academy of Arts and Sciences and University Medical Center, 3584CTUtrecht, the Netherlands
- Department of Molecular and Cellular Biology, Miller Institute for Basic Research in Science, University of California, Berkeley, CA94720
| | - Ziliang Ma
- Singapore Immunology Network, Agency for Science, Technology and Research, Singapore138648, Singapore
- Department of Pharmacy, National University of Singapore, Singapore117543, Singapore
- Department of Biomolecular Mass Spectrometry and Proteomics, Biomolecular Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular Research and Utrecht Institute for Pharmaceutical Sciences, Utrecht University, 3584 CHUtrecht, the Netherlands
| | - Nadzeya Staliarova
- Department of Biomolecular Mass Spectrometry and Proteomics, Biomolecular Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular Research and Utrecht Institute for Pharmaceutical Sciences, Utrecht University, 3584 CHUtrecht, the Netherlands
| | - Martina Celotti
- Organoid group, Oncode Institute, Hubrecht Institute, Royal Netherlands Academy of Arts and Sciences and University Medical Center, 3584CTUtrecht, the Netherlands
| | - Sangho Lim
- Organoid group, Oncode Institute, Hubrecht Institute, Royal Netherlands Academy of Arts and Sciences and University Medical Center, 3584CTUtrecht, the Netherlands
| | - Gui-Wei He
- Organoid group, Oncode Institute, Hubrecht Institute, Royal Netherlands Academy of Arts and Sciences and University Medical Center, 3584CTUtrecht, the Netherlands
| | - Rosemary Millen
- Organoid group, Oncode Institute, Hubrecht Institute, Royal Netherlands Academy of Arts and Sciences and University Medical Center, 3584CTUtrecht, the Netherlands
| | - Else Driehuis
- Organoid group, Oncode Institute, Hubrecht Institute, Royal Netherlands Academy of Arts and Sciences and University Medical Center, 3584CTUtrecht, the Netherlands
| | - Harry Begthel
- Organoid group, Oncode Institute, Hubrecht Institute, Royal Netherlands Academy of Arts and Sciences and University Medical Center, 3584CTUtrecht, the Netherlands
| | - Lidwien Smabers
- Department of Medical Oncology, University Medical Center Utrecht, 3584 CXUtrecht, the Netherlands
| | - Jeanine Roodhart
- Department of Medical Oncology, University Medical Center Utrecht, 3584 CXUtrecht, the Netherlands
| | - Johan van Es
- Organoid group, Oncode Institute, Hubrecht Institute, Royal Netherlands Academy of Arts and Sciences and University Medical Center, 3584CTUtrecht, the Netherlands
| | - Wei Wu
- Singapore Immunology Network, Agency for Science, Technology and Research, Singapore138648, Singapore
- Department of Pharmacy, National University of Singapore, Singapore117543, Singapore
- Department of Biomolecular Mass Spectrometry and Proteomics, Biomolecular Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular Research and Utrecht Institute for Pharmaceutical Sciences, Utrecht University, 3584 CHUtrecht, the Netherlands
| | - Hans Clevers
- Organoid group, Oncode Institute, Hubrecht Institute, Royal Netherlands Academy of Arts and Sciences and University Medical Center, 3584CTUtrecht, the Netherlands
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2
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Chan DKH, Mandal A, Hester S, Yu Z, Higgins GS, Kessler BM, Fischer R, Buczacki SJA. Biallelic FBXW7 knockout induces AKAP8-mediated DNA damage in neighbouring wildtype cells. Cell Death Discov 2023; 9:200. [PMID: 37386001 DOI: 10.1038/s41420-023-01494-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: 02/22/2023] [Revised: 05/24/2023] [Accepted: 06/16/2023] [Indexed: 07/01/2023] Open
Abstract
Colorectal cancer possesses marked intratumoral heterogeneity. While subclonal interactions between Vogelstein driver mutations have been extensively studied, less is known about competitive or cooperative effects between subclonal populations with other cancer driver mutations. FBXW7 is a cancer driver mutation which is present in close to 17% of colorectal cancer cells. In this study, we generated isogenic FBXW7 mutant cells using CRISPR-Cas9. We identified an upregulation of oxidative phosphorylation and DNA damage in FBXW7 mutant cells, which surprisingly proliferated at a decreased rate compared to wildtype cells. To determine subclonal interactions, wildtype and mutant FBXW7 cells were cocultured using a Transwell system. Wildtype cells cocultured with FBXW7 mutant cells similarly developed DNA damage which was not observed when wildtype cells were co-cultured with other wildtype cells, suggesting that FBXW7 mutant cells were inducing DNA damage in neighbouring wildtype cells. Using mass spectrometry, we identified AKAP8 as being secreted by FBXW7 mutant cells into the coculture media. Furthermore, overexpression of AKAP8 in wildtype cells recapitulated the DNA damage phenotype observed during coculture, while co-culture of wildtype cells with double mutant FBXW7-/-/AKAP8-/- cells abrogated the DNA damage phenotype. Here, we describe a hitherto unknown phenomenon of AKAP8-mediated DNA damage from FBXW7 mutant to neighbouring wildtype cells. Our findings demonstrate the importance of elucidating the local effect of cancer driver mutations between subclonal populations.
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Affiliation(s)
- Dedrick Kok Hong Chan
- Nuffield Department of Surgical Sciences, University of Oxford, Oxford, UK
- NUS Centre for Cancer Research, Yong Loo Lin School of Medicine, Singapore, Singapore
| | - Amit Mandal
- Nuffield Department of Surgical Sciences, University of Oxford, Oxford, UK
| | - Svenja Hester
- Nuffield Department of Medicine, Target Discovery Institute, University of Oxford, Oxford, UK
| | - Zhanru Yu
- Nuffield Department of Medicine, Target Discovery Institute, University of Oxford, Oxford, UK
- Nuffield Department of Medicine, Chinese Academy for Medical Sciences Oxford Institute, University of Oxford, Oxford, UK
| | | | - Benedikt Mathias Kessler
- Nuffield Department of Medicine, Target Discovery Institute, University of Oxford, Oxford, UK
- Nuffield Department of Medicine, Chinese Academy for Medical Sciences Oxford Institute, University of Oxford, Oxford, UK
| | - Roman Fischer
- Nuffield Department of Medicine, Target Discovery Institute, University of Oxford, Oxford, UK
- Nuffield Department of Medicine, Chinese Academy for Medical Sciences Oxford Institute, University of Oxford, Oxford, UK
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3
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Zhang X, Liu Y, Zhang T, Tan Y, Dai X, Yang YG, Zhang X. Advances in the potential roles of Cullin-RING ligases in regulating autoimmune diseases. Front Immunol 2023; 14:1125224. [PMID: 37006236 PMCID: PMC10064048 DOI: 10.3389/fimmu.2023.1125224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Accepted: 02/28/2023] [Indexed: 03/19/2023] Open
Abstract
Cullin-RING ligases (CRLs) are the largest class of E3 ubiquitin ligases regulating the stability and subsequent activity of a large number of important proteins responsible for the development and progression of various diseases, including autoimmune diseases (AIDs). However, the detailed mechanisms of the pathogenesis of AIDs are complicated and involve multiple signaling pathways. An in-depth understanding of the underlying regulatory mechanisms of the initiation and progression of AIDs will aid in the development of effective therapeutic strategies. CRLs play critical roles in regulating AIDs, partially by affecting the key inflammation-associated pathways such as NF-κB, JAK/STAT, and TGF-β. In this review, we summarize and discuss the potential roles of CRLs in the inflammatory signaling pathways and pathogenesis of AIDs. Furthermore, advances in the development of novel therapeutic strategies for AIDs through targeting CRLs are also highlighted.
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Affiliation(s)
- Xiaoying Zhang
- Key Laboratory of Organ Regeneration and Transplantation of Ministry of Education, First Hospital, Jilin University, Changchun, China
- National-Local Joint Engineering Laboratory of Animal Models for Human Disease, First Hospital, Jilin University, Changchun, China
| | - Yu’e Liu
- Tongji University Cancer Center, Shanghai Tenth People’s Hospital of Tongji University, School of Medicine, Tongji University, Shanghai, China
| | - Tong Zhang
- Key Laboratory of Organ Regeneration and Transplantation of Ministry of Education, First Hospital, Jilin University, Changchun, China
- National-Local Joint Engineering Laboratory of Animal Models for Human Disease, First Hospital, Jilin University, Changchun, China
| | - Yuying Tan
- Key Laboratory of Organ Regeneration and Transplantation of Ministry of Education, First Hospital, Jilin University, Changchun, China
- National-Local Joint Engineering Laboratory of Animal Models for Human Disease, First Hospital, Jilin University, Changchun, China
| | - Xiangpeng Dai
- Key Laboratory of Organ Regeneration and Transplantation of Ministry of Education, First Hospital, Jilin University, Changchun, China
- National-Local Joint Engineering Laboratory of Animal Models for Human Disease, First Hospital, Jilin University, Changchun, China
- *Correspondence: Xiangpeng Dai, ; Yong-Guang Yang, ; Xiaoling Zhang,
| | - Yong-Guang Yang
- Key Laboratory of Organ Regeneration and Transplantation of Ministry of Education, First Hospital, Jilin University, Changchun, China
- National-Local Joint Engineering Laboratory of Animal Models for Human Disease, First Hospital, Jilin University, Changchun, China
- International Center of Future Science, Jilin University, Changchun, China
- *Correspondence: Xiangpeng Dai, ; Yong-Guang Yang, ; Xiaoling Zhang,
| | - Xiaoling Zhang
- Key Laboratory of Organ Regeneration and Transplantation of Ministry of Education, First Hospital, Jilin University, Changchun, China
- National-Local Joint Engineering Laboratory of Animal Models for Human Disease, First Hospital, Jilin University, Changchun, China
- *Correspondence: Xiangpeng Dai, ; Yong-Guang Yang, ; Xiaoling Zhang,
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Luo K, Huang Z, Lv X, Qiu W, Guan H, Yang T, Grosjean T, Lu H. Directional Bloch surface wave coupling enabled by magnetic spin-momentum locking of light. NANOSCALE ADVANCES 2023; 5:1664-1671. [PMID: 36926573 PMCID: PMC10012835 DOI: 10.1039/d2na00899h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Accepted: 02/06/2023] [Indexed: 06/18/2023]
Abstract
We study the magnetic spin-locking of optical surface waves. Through an angular spectrum approach and numerical simulations, we predict that a spinning magnetic dipole develops a directional coupling of light to transverse electric (TE) polarized Bloch surface waves (BSWs). A high-index nanoparticle as a magnetic dipole and nano-coupler is placed on top of a one-dimensional photonic crystal to couple light into BSWs. Upon circularly polarized illumination, it mimics the spinning magnetic dipole. We find that the helicity of the light impinging on the nano-coupler controls the directionality of emerging BSWs. Furthermore, identical silicon strip waveguides are configured on the two sides of the nano-coupler to confine and guide the BSWs. We achieve a directional nano-routing of BSWs with circularly polarized illumination. Such a directional coupling phenomenon is proved to be solely mediated by the optical magnetic field. This offers opportunities for directional switching and polarization sorting by controlling optical flows in ultra-compact architectures and enables the investigation of the magnetic polarization properties of light.
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Affiliation(s)
- Kaiwen Luo
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Department of Optoelectronic Engineering, Jinan University Guangzhou 510632 China
| | - Zhijing Huang
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Department of Optoelectronic Engineering, Jinan University Guangzhou 510632 China
- School of Electronics and Communication, Guangdong Mechanical and Electrical Polytechnic Guangzhou 510550 China
| | - Xianpeng Lv
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Department of Optoelectronic Engineering, Jinan University Guangzhou 510632 China
| | - Wentao Qiu
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Department of Optoelectronic Engineering, Jinan University Guangzhou 510632 China
| | - Heyuan Guan
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Department of Optoelectronic Engineering, Jinan University Guangzhou 510632 China
| | - Tiefeng Yang
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Department of Optoelectronic Engineering, Jinan University Guangzhou 510632 China
- Key Laboratory of Optoelectronic Information and Sensing Technologies of Guangdong Higher Education Institutes, Jinan University Guangzhou 510632 China
| | - Thierry Grosjean
- CNRS, FEMTO-ST Institute UMR 6174, Université Bourgogne Franche-Comté Besançon 25000 France
| | - Huihui Lu
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Department of Optoelectronic Engineering, Jinan University Guangzhou 510632 China
- Key Laboratory of Optoelectronic Information and Sensing Technologies of Guangdong Higher Education Institutes, Jinan University Guangzhou 510632 China
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5
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Li W, Jin K, Luo J, Xu W, Wu Y, Zhou J, Wang Y, Xu R, Jiao L, Wang T, Yang G. NF-κB and its crosstalk with endoplasmic reticulum stress in atherosclerosis. Front Cardiovasc Med 2022; 9:988266. [PMID: 36204587 PMCID: PMC9530249 DOI: 10.3389/fcvm.2022.988266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Accepted: 08/30/2022] [Indexed: 11/13/2022] Open
Abstract
Atherosclerosis (AS) is a common cardiovascular disease with complex pathogenesis, in which multiple pathways and their interweaving regulatory mechanism remain unclear. The primary transcription factor NF-κB plays a critical role in AS via modulating the expression of a series of inflammatory mediators under various stimuli such as cytokines, microbial antigens, and intracellular stresses. Endoplasmic reticulum (ER) stress, caused by the disrupted synthesis and secretion of protein, links inflammation, metabolic signals, and other cellular processes via the unfolded protein response (UPR). Both NF-κB and ER stress share the intersection regarding their molecular regulation and function and are regarded as critical individual contributors to AS. In this review, we summarize the multiple interactions between NF-κB and ER stress activation, including the UPR, NLRP3 inflammasome, and reactive oxygen species (ROS) generation, which have been ignored in the pathogenesis of AS. Given the multiple links between NF-κB and ER stress, we speculate that the integrated network contributes to the understanding of molecular mechanisms of AS. This review aims to provide an insight into these interactions and their underlying roles in the progression of AS, highlighting potential pharmacological targets against the atherosclerotic inflammatory process.
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Affiliation(s)
- Wenjing Li
- Laboratory of Computational Biology and Machine Intelligence, National Laboratory of Pattern Recognition, Institute of Automation, Chinese Academy of Sciences, Beijing, China
- School of Artificial Intelligence, University of Chinese Academy of Sciences, Beijing, China
| | - Kehan Jin
- Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, China
| | - Jichang Luo
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
- China International Neuroscience Institute (China-INI), Beijing, China
| | - Wenlong Xu
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
- China International Neuroscience Institute (China-INI), Beijing, China
| | - Yujie Wu
- Laboratory of Computational Biology and Machine Intelligence, National Laboratory of Pattern Recognition, Institute of Automation, Chinese Academy of Sciences, Beijing, China
| | - Jia Zhou
- Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, China
| | - Yilin Wang
- Institute of Cerebrovascular Disease Research and Department of Neurology, Xuanwu Hospital of Capital Medical University, Beijing, China
| | - Ran Xu
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
- China International Neuroscience Institute (China-INI), Beijing, China
| | - Liqun Jiao
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
- China International Neuroscience Institute (China-INI), Beijing, China
- Department of Interventional Radiology, Xuanwu Hospital, Capital Medical University, Beijing, China
- *Correspondence: Liqun Jiao,
| | - Tao Wang
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
- China International Neuroscience Institute (China-INI), Beijing, China
- Tao Wang,
| | - Ge Yang
- Laboratory of Computational Biology and Machine Intelligence, National Laboratory of Pattern Recognition, Institute of Automation, Chinese Academy of Sciences, Beijing, China
- School of Artificial Intelligence, University of Chinese Academy of Sciences, Beijing, China
- Tao Wang,
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6
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Multiple Mechanisms of NOTCH1 Activation in Chronic Lymphocytic Leukemia: NOTCH1 Mutations and Beyond. Cancers (Basel) 2022; 14:cancers14122997. [PMID: 35740661 PMCID: PMC9221163 DOI: 10.3390/cancers14122997] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Revised: 06/14/2022] [Accepted: 06/14/2022] [Indexed: 11/20/2022] Open
Abstract
Simple Summary Mutations of the NOTCH1 gene are a validated prognostic marker in chronic lymphocytic leukemia and a potential predictive marker for anti-CD20-based therapies. At present, the most frequent pathological alteration of the NOTCH1 gene is due to somatic genetic mutations, which have a multifaceted functional impact. However, beside NOTCH1 mutations, other factors may lead to activation of the NOTCH1 pathway, and these include mutations of FBXW7, MED12, SPEN, SF3B1 as well as other B-cell pathways. Understanding the preferential strategies though which CLL cells hijack NOTCH1 signaling may present important clues for designing targeted treatment strategies for the management of CLL. Abstract The Notch signaling pathway plays a fundamental role for the terminal differentiation of multiple cell types, including B and T lymphocytes. The Notch receptors are transmembrane proteins that, upon ligand engagement, undergo multiple processing steps that ultimately release their intracytoplasmic portion. The activated protein ultimately operates as a nuclear transcriptional co-factor, whose stability is finely regulated. The Notch pathway has gained growing attention in chronic lymphocytic leukemia (CLL) because of the high rate of somatic mutations of the NOTCH1 gene. In CLL, NOTCH1 mutations represent a validated prognostic marker and a potential predictive marker for anti-CD20-based therapies, as pathological alterations of the Notch pathway can provide significant growth and survival advantage to neoplastic clone. However, beside NOTCH1 mutation, other events have been demonstrated to perturb the Notch pathway, namely somatic mutations of upstream, or even apparently unrelated, proteins such as FBXW7, MED12, SPEN, SF3B1, as well as physiological signals from other pathways such as the B-cell receptor. Here we review these mechanisms of activation of the NOTCH1 pathway in the context of CLL; the resulting picture highlights how multiple different mechanisms, that might occur under specific genomic, phenotypic and microenvironmental contexts, ultimately result in the same search for proliferative and survival advantages (through activation of MYC), as well as immune escape and therapy evasion (from anti-CD20 biological therapies). Understanding the preferential strategies through which CLL cells hijack NOTCH1 signaling may present important clues for designing targeted treatment strategies for the management of CLL.
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Mobeen A, Puniya BL, Ramachandran S. A computational approach to investigate constitutive activation of
NF‐κB. Proteins 2022; 90:1944-1964. [DOI: 10.1002/prot.26388] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Revised: 05/12/2022] [Accepted: 05/23/2022] [Indexed: 11/10/2022]
Affiliation(s)
- Ahmed Mobeen
- CSIR – Institute of Genomics & Integrative Biology, Sukhdev Vihar New Delhi India
- Academy of Scientific & Innovative Research (AcSIR) Ghaziabad Uttar Pradesh India
| | - Bhanwar Lal Puniya
- Department of Biochemistry University of Nebraska‐Lincoln Lincoln Nebraska USA
| | - Srinivasan Ramachandran
- CSIR – Institute of Genomics & Integrative Biology, Sukhdev Vihar New Delhi India
- Academy of Scientific & Innovative Research (AcSIR) Ghaziabad Uttar Pradesh India
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8
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Fan J, Bellon M, Ju M, Zhao L, Wei M, Fu L, Nicot C. Clinical significance of FBXW7 loss of function in human cancers. Mol Cancer 2022; 21:87. [PMID: 35346215 PMCID: PMC8962602 DOI: 10.1186/s12943-022-01548-2] [Citation(s) in RCA: 47] [Impact Index Per Article: 23.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Accepted: 02/22/2022] [Indexed: 12/13/2022] Open
Abstract
FBXW7 (F-Box and WD Repeat Domain Containing 7) (also referred to as FBW7 or hCDC4) is a component of the Skp1-Cdc53 / Cullin-F-box-protein complex (SCF/β-TrCP). As a member of the F-box protein family, FBXW7 serves a role in phosphorylation-dependent ubiquitination and proteasome degradation of oncoproteins that play critical role(s) in oncogenesis. FBXW7 affects many regulatory functions involved in cell survival, cell proliferation, tumor invasion, DNA damage repair, genomic instability and telomere biology. This thorough review of current literature details how FBXW7 expression and functions are regulated through multiple mechanisms and how that ultimately drives tumorigenesis in a wide array of cell types. The clinical significance of FBXW7 is highlighted by the fact that FBXW7 is frequently inactivated in human lung, colon, and hematopoietic cancers. The loss of FBXW7 can serve as an independent prognostic marker and is significantly correlated with the resistance of tumor cells to chemotherapeutic agents and poorer disease outcomes. Recent evidence shows that genetic mutation of FBXW7 differentially affects the degradation of specific cellular targets resulting in a distinct and specific pattern of activation/inactivation of cell signaling pathways. The clinical significance of FBXW7 mutations in the context of tumor development, progression, and resistance to therapies as well as opportunities for targeted therapies is discussed.
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Affiliation(s)
- Jingyi Fan
- State Key Laboratory of Oncology in South China; Collaborative Innovation Center for Cancer Medicine, Guangdong Esophageal Cancer Institute; Sun Yat-sen University Cancer Center, Guangzhou, 510060, Guangdong Province, China.,Department of Pharmacology, School of Pharmacy, China Medical University, Shenyang, 110122, China.,Liaoning Province, China Liaoning Key Laboratory of Molecular Targeted Anti-Tumor Drug Development and Evaluation, Liaoning Cancer Immune Peptide Drug Engineering Technology Research Center, Key Laboratory of Precision Diagnosis and Treatment of Gastrointestinal Tumors, Ministry of Education, China Medical University, Shenyang, 110122, Liaoning Province, China
| | - Marcia Bellon
- Department of Pathology and Laboratory Medicine, Center for Viral Pathogenesis, University of Kansas Medical Center, 3901 Rainbow Boulevard, Kansas City, KS, 66160, USA
| | - Mingyi Ju
- Department of Pharmacology, School of Pharmacy, China Medical University, Shenyang, 110122, China.,Liaoning Province, China Liaoning Key Laboratory of Molecular Targeted Anti-Tumor Drug Development and Evaluation, Liaoning Cancer Immune Peptide Drug Engineering Technology Research Center, Key Laboratory of Precision Diagnosis and Treatment of Gastrointestinal Tumors, Ministry of Education, China Medical University, Shenyang, 110122, Liaoning Province, China
| | - Lin Zhao
- Department of Pharmacology, School of Pharmacy, China Medical University, Shenyang, 110122, China.,Liaoning Province, China Liaoning Key Laboratory of Molecular Targeted Anti-Tumor Drug Development and Evaluation, Liaoning Cancer Immune Peptide Drug Engineering Technology Research Center, Key Laboratory of Precision Diagnosis and Treatment of Gastrointestinal Tumors, Ministry of Education, China Medical University, Shenyang, 110122, Liaoning Province, China
| | - Minjie Wei
- Department of Pharmacology, School of Pharmacy, China Medical University, Shenyang, 110122, China.,Liaoning Province, China Liaoning Key Laboratory of Molecular Targeted Anti-Tumor Drug Development and Evaluation, Liaoning Cancer Immune Peptide Drug Engineering Technology Research Center, Key Laboratory of Precision Diagnosis and Treatment of Gastrointestinal Tumors, Ministry of Education, China Medical University, Shenyang, 110122, Liaoning Province, China
| | - Liwu Fu
- State Key Laboratory of Oncology in South China; Collaborative Innovation Center for Cancer Medicine, Guangdong Esophageal Cancer Institute; Sun Yat-sen University Cancer Center, Guangzhou, 510060, Guangdong Province, China.
| | - Christophe Nicot
- Department of Pathology and Laboratory Medicine, Center for Viral Pathogenesis, University of Kansas Medical Center, 3901 Rainbow Boulevard, Kansas City, KS, 66160, USA.
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9
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Comprehensive Study of Human FBXW7 Deleterious nsSNP's Functional Inference and Susceptibility to Gynaecological Cancer. Appl Biochem Biotechnol 2021; 194:407-433. [PMID: 34817806 DOI: 10.1007/s12010-021-03759-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Accepted: 11/08/2021] [Indexed: 10/19/2022]
Abstract
Cancer is one of the world's major causes of mortality, and it plays a most important role in the world's declining life expectancy. F-box and WD-40 domain protein 7 (FBXW7), a typical participant of the F-box family of proteins, has been considered as an anti-tumor protein and one of the maximum deregulated ubiquitin-proteasome system proteins in uterine carcinosarcoma, endometrial clear cell carcinoma and cervical carcinoma with the greatest prevalence of alterations. FBXW7 variants with known clinical significance, as well as non-synonymous single nucleotide polymorphisms (nsSNPs) in the F-Box and WD40 domains, were evaluated using functionality prediction web resources. Upon analysing the seventy-three deleterious nsSNP's impact on protein stability and function, we identified that forty-one nsSNPs of WD40 domain and three of F-Box domain imply decreased stability of the FBXW7 structure. Next to TP53 and PTEN, FBXW7 was reported with the highest percentage of arginine substitution among mutations related to cancer. The current research concentrated on two arginine residue locations (Arg465, Arg505) within the WD40-repeat domain, which is vital for substrate binding. Computational analysis revealed significant deviation in stability and structural configuration of mutants R505L, R465H, R465P, R505G, R505C, R465C, R505S and R505L structures. Protein-protein interaction network of FBXW7 populated with promising hub proteins NOTCH1, c-Myc, CCNE1, STYX, KLG5, SREB1, NFKB2, SKP1 and CUL1; thus, alteration in the FBXW7 leads to aberration in their signalling pathways as well as their substrate binding ability makes this protein as attractive target for personalized therapeutic intervention.
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10
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Lan H, Sun Y. Tumor Suppressor FBXW7 and Its Regulation of DNA Damage Response and Repair. Front Cell Dev Biol 2021; 9:751574. [PMID: 34760892 PMCID: PMC8573206 DOI: 10.3389/fcell.2021.751574] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2021] [Accepted: 10/05/2021] [Indexed: 12/21/2022] Open
Abstract
The proper DNA damage response (DDR) and repair are the central molecular mechanisms for the maintenance of cellular homeostasis and genomic integrity. The abnormality in this process is frequently observed in human cancers, and is an important contributing factor to cancer development. FBXW7 is an F-box protein serving as the substrate recognition component of SCF (SKP1-CUL1-F-box protein) E3 ubiquitin ligase. By selectively targeting many oncoproteins for proteasome-mediated degradation, FBXW7 acts as a typical tumor suppressor. Recent studies have demonstrated that FBXW7 also plays critical roles in the process of DDR and repair. In this review, we first briefly introduce the processes of protein ubiquitylation by SCFFBXW7 and DDR/repair, then provide an overview of the molecular characteristics of FBXW7. We next discuss how FBXW7 regulates the process of DDR and repair, and its translational implication. Finally, we propose few future perspectives to further elucidate the role of FBXW7 in regulation of a variety of biological processes and tumorigenesis, and to design a number of approaches for FBXW7 reactivation in a subset of human cancers for potential anticancer therapy.
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Affiliation(s)
- Huiyin Lan
- Department of Thoracic Radiation Oncology, Zhejiang Cancer Hospital, Cancer Hospital of University of Chinese Academy of Sciences, Hangzhou, China.,Institute of Cancer and Basic Medicine, Chinese Academy of Sciences, Hangzhou, China
| | - Yi Sun
- Cancer Institute of the Second Affiliated Hospital, Institute of Translational Medicine, Zhejiang University School of Medicine, Hangzhou, China.,Cancer Center, Zhejiang University, Hangzhou, China
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11
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Zhang E, Chen S, Tang H, Fei C, Yuan Z, Mu X, Qin Y, Liu H, Fan Y, Tan M, Wang X. CDK1/FBXW7 facilitates degradation and ubiquitination of MLST8 to inhibit progression of renal cell carcinoma. Cancer Sci 2021; 113:91-108. [PMID: 34741373 PMCID: PMC8748215 DOI: 10.1111/cas.15188] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Revised: 10/06/2021] [Accepted: 10/28/2021] [Indexed: 11/29/2022] Open
Abstract
Recent studies have reported that MLST8 is upregulated in many malignant tumors. Nevertheless, the underlying molecular mechanism is still unclear. The aim of this work was to investigate how MLST8 contributes to the development and progression of clear cell renal cell carcinoma (ccRCC). MLST8 is an oncogenic protein in the TCGA database and ccRCC clinical specimens. We also ascertain that MLST8 interacts with FBXW7, which was universally regarded as an E3 ubiquitin ligase. MLST8 can be degraded and ubiquitinated by tumor suppressor FBXW7. FBXW7 recognizes a consensus motif (T/S) PXX (S/T/D/E) of MLST8 and triggers MLST8 degradation via the ubiquitin‐proteasome pathway. Strikingly, the activated cyclin dependent kinase 1 (CDK1) kinase engages in the MLST8 phosphorylation required for FBXW7‐mediated degradation. In vitro, we further prove that MLST8 is an essential mediator of FBXW7 inactivation‐induced tumor growth, migration, and invasion. Furthermore, the MLST8 and FBXW7 proteins are negatively correlated in human renal cancer specimens. Our findings suggest that MLST8 is a putative oncogene that functions via interaction with FBXW7, and inhibition MLST8 could be a potential future target in ccRCC treatment.
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Affiliation(s)
- Encheng Zhang
- Department of Urology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Siteng Chen
- Department of Urology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Heting Tang
- Department of Urology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Cheng Fei
- Department of Urology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Zhihao Yuan
- Department of Urology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xingyu Mu
- Department of Urology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yan Qin
- Department of Urology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Haixia Liu
- State Key Laboratory of Genetic Engineering, Collaborative Innovation Center for Genetics and Development, School of Life Sciences, Fudan University, Shanghai, China
| | - Yu Fan
- Department of Renal Transplantation, Xiang'an Hospital of Xiamen University, Xiamen, China
| | - Mingyue Tan
- Department of Urology, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Xiang Wang
- Department of Urology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
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PRMT5: An Emerging Target for Pancreatic Adenocarcinoma. Cancers (Basel) 2021; 13:cancers13205136. [PMID: 34680285 PMCID: PMC8534199 DOI: 10.3390/cancers13205136] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Revised: 10/11/2021] [Accepted: 10/12/2021] [Indexed: 12/12/2022] Open
Abstract
Simple Summary The burden of pancreatic ductal adenocarcinoma (PDAC) increases with rising incidence, yet 5-year overall survival remains poor at 17%. Routine comprehensive genomic profiling of PDAC only finds 2.5% of patients who may benefit and receive matched targeted therapy. Protein arginine methyltransferase 5 (PRMT5) as an anti-cancer target has gained significant interest in recent years and high levels of PRMT5 protein are associated with worse survival outcomes across multiple cancer types. Inhibition of PRMT5 in pre-clinical models can lead to cancer growth inhibition. However, PRMT5 is involved in multiple cellular processes, thus determining its mechanism of action is challenging. While past reviews on PRMT5 have focused on its role in diverse cellular processes and past research studies have focused mainly on haematological malignancies and glioblastoma, this review provides an overview of the possible biological mechanisms of action of PRMT5 inhibition and its potential as a treatment in pancreatic cancer. Abstract The overall survival of pancreatic ductal adenocarcinoma (PDAC) remains poor and its incidence is rising. Targetable mutations in PDAC are rare, thus novel therapeutic approaches are needed. Protein arginine methyltransferase 5 (PRMT5) overexpression is associated with worse survival and inhibition of PRMT5 results in decreased cancer growth across multiple cancers, including PDAC. Emerging evidence also suggests that altered RNA processing is a driver in PDAC tumorigenesis and creates a partial dependency on this process. PRMT5 inhibition induces altered splicing and this vulnerability can be exploited as a novel therapeutic approach. Three possible biological pathways underpinning the action of PRMT5 inhibitors are discussed; c-Myc regulation appears central to its action in the PDAC setting. Whilst homozygous MTAP deletion and symmetrical dimethylation levels are associated with increased sensitivity to PRMT5 inhibition, neither measure robustly predicts its growth inhibitory response. The immunomodulatory effect of PRMT5 inhibitors on the tumour microenvironment will also be discussed, based on emerging evidence that PDAC stroma has a significant bearing on disease behaviour and response to therapy. Lastly, with the above caveats in mind, current knowledge gaps and the implications and rationales for PRMT5 inhibitor development in PDAC will be explored.
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Chen M, Gao YT, Li WX, Wang JC, He YP, Li ZW, Gan GS, Yuan B. FBW7 protects against spinal cord injury by mitigating inflammation-associated neuronal apoptosis in mice. Biochem Biophys Res Commun 2020; 532:576-583. [PMID: 32900488 DOI: 10.1016/j.bbrc.2020.08.071] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Accepted: 08/20/2020] [Indexed: 01/18/2023]
Abstract
Spinal cord injury (SCI) leads to severe and long-lasting neurological disability. Presently, the lack of effective therapies for SCI is largely attributable to an incomplete understanding of its pathogenesis. F-box and WD repeat domain-containing protein 7 (FBW7, also known as FBXW7) is a type of E3 ubiquitin ligase complex, and plays essential roles in regulating different pathological and physiological processes. In this study, we attempted to explore the effects of FBW7 on SCI progression by the in vivo and in vitro experiments. SCI mice showed significantly reduced expression of FBW7 in spinal cord tissues. Promoting FBW7 expression via intrathecal injection of AAV9/FBW7 effectively improved locomotor function in SCI mice. Neuronal death in spinal cords of SCI mice was obviously ameliorated by FBW7 over-expression, along with greatly decreased expression of cleaved Caspase-3. In addition, microglial activation in spinal cord specimens was detected in SCI mice through increasing Iba-1 expression levels, which was, however, attenuated in SCI mice injected with AAV9/FBW7. Additionally, FBW7 over-expression dramatically restrained inflammatory response in spinal cord tissues of SCI mice, as evidenced by the down-regulated expression of tumor necrosis factor-α (TNF-α) and interleukin 1β (IL-1β) through blocking the activation of nuclear factor-κB (NF-κB) signaling. These anti-inflammatory effects of FBW7 were confirmed in LPS-stimulated mouse microglial BV2 cells. Finally, our in vitro studies showed that conditional medium (CM) collected from LPS-incubated BV2 cells markedly induced apoptosis in the isolated primary spinal neurons; However, this effect was overtly ameliorated by CM from LPS-exposed BV2 cells over-expressing FBW7. Thus, FBW7-regulated inflammation in microglial cells was involved in the amelioration of neuronal apoptosis during SCI development. Collectively, these findings illustrated that FBW7 expression was down-regulated in spinal cords of SCI mice, and promoting its expression could effectively mitigate SCI progression by repressing microglial inflammation and neuronal death.
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Affiliation(s)
- Min Chen
- Department of Anesthesiology, Shenzhen Samii Medical Center, Shenzhen City, 518118, China
| | - Yu-Ting Gao
- Affiliated Cancer Hospital & Institute of Guangzhou Medical University, Guangzhou, 510095, China
| | - Wei-Xin Li
- Department of Neurosugery, Shenzhen Samii Medical Center, Shenzhen City, 518118, China
| | - Jian-Chun Wang
- Experimental Center, Shenzhen Samii Medical Center, Shenzhen City, 518118, China
| | - Yun-Peng He
- Department of Anesthesiology, Shenzhen Samii Medical Center, Shenzhen City, 518118, China
| | - Zhi-Wen Li
- Shenzhen Samii Medical Center, Shenzhen City, 518118, China
| | - Guo-Sheng Gan
- Department of Anesthesiology, General Hospital of Central Cheater Command of People's Liberation Army of China, Wuhan, 430070, China.
| | - Bo Yuan
- Department of Neurology, Shenzhen Samii Medical Center, Shenzhen City, 518118, China.
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14
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Morgan EL, Chen Z, Van Waes C. Regulation of NFκB Signalling by Ubiquitination: A Potential Therapeutic Target in Head and Neck Squamous Cell Carcinoma? Cancers (Basel) 2020; 12:E2877. [PMID: 33036368 PMCID: PMC7601648 DOI: 10.3390/cancers12102877] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Revised: 09/22/2020] [Accepted: 09/29/2020] [Indexed: 02/08/2023] Open
Abstract
Head and neck squamous cell carcinoma (HNSCC) is the sixth most common cancer worldwide, with over 600,000 cases per year. The primary causes for HNSCC include smoking and alcohol consumption, with an increasing number of cases attributed to infection with Human Papillomavirus (HPV). The treatment options for HNSCC currently include surgery, radiotherapy, and/or platinum-based chemotherapeutics. Cetuximab (targeting EGFR) and Pembrolizumab (targeting PD-1) have been approved for advanced stage, recurrent, and/or metastatic HNSCC. Despite these advances, whilst HPV+ HNSCC has a 3-year overall survival (OS) rate of around 80%, the 3-year OS for HPV- HNSCC is still around 55%. Aberrant signal activation of transcription factor NFκB plays an important role in the pathogenesis and therapeutic resistance of HNSCC. As an important mediator of inflammatory signalling and the immune response to pathogens, the NFκB pathway is tightly regulated to prevent chronic inflammation, a key driver of tumorigenesis. Here, we discuss how NFκB signalling is regulated by the ubiquitin pathway and how this pathway is deregulated in HNSCC. Finally, we discuss the current strategies available to target the ubiquitin pathway and how this may offer a potential therapeutic benefit in HNSCC.
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Affiliation(s)
- Ethan L. Morgan
- Tumor Biology Section, Head and Neck Surgery Branch, National Institute of Deafness and Other Communication Disorders, NIH, Bethesda, MD 20892, USA;
| | - Zhong Chen
- Tumor Biology Section, Head and Neck Surgery Branch, National Institute of Deafness and Other Communication Disorders, NIH, Bethesda, MD 20892, USA;
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15
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Targeting NF-κB pathway for the therapy of diseases: mechanism and clinical study. Signal Transduct Target Ther 2020; 5:209. [PMID: 32958760 PMCID: PMC7506548 DOI: 10.1038/s41392-020-00312-6] [Citation(s) in RCA: 692] [Impact Index Per Article: 173.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2020] [Revised: 08/25/2020] [Accepted: 08/31/2020] [Indexed: 02/05/2023] Open
Abstract
NF-κB pathway consists of canonical and non-canonical pathways. The canonical NF-κB is activated by various stimuli, transducing a quick but transient transcriptional activity, to regulate the expression of various proinflammatory genes and also serve as the critical mediator for inflammatory response. Meanwhile, the activation of the non-canonical NF-κB pathway occurs through a handful of TNF receptor superfamily members. Since the activation of this pathway involves protein synthesis, the kinetics of non-canonical NF-κB activation is slow but persistent, in concordance with its biological functions in the development of immune cell and lymphoid organ, immune homeostasis and immune response. The activation of the canonical and non-canonical NF-κB pathway is tightly controlled, highlighting the vital roles of ubiquitination in these pathways. Emerging studies indicate that dysregulated NF-κB activity causes inflammation-related diseases as well as cancers, and NF-κB has been long proposed as the potential target for therapy of diseases. This review attempts to summarize our current knowledge and updates on the mechanisms of NF-κB pathway regulation and the potential therapeutic application of inhibition of NF-κB signaling in cancer and inflammatory diseases.
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16
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Zhao J, Jia Y, Shen S, Kim J, Wang X, Lee E, Brownell I, Cho-Vega JH, Lewis C, Homsi J, Sharma RR, Wang RC. Merkel Cell Polyomavirus Small T Antigen Activates Noncanonical NF-κB Signaling to Promote Tumorigenesis. Mol Cancer Res 2020; 18:1623-1637. [PMID: 32753470 DOI: 10.1158/1541-7786.mcr-20-0587] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Revised: 07/16/2020] [Accepted: 07/16/2020] [Indexed: 01/21/2023]
Abstract
Multiple human polyomaviruses (HPyV) can infect the skin, but only Merkel cell polyomavirus (MCPyV) has been implicated in the development of a cancer, Merkel cell carcinoma (MCC). While expression of HPyV6, HPyV7, and MCPyV small T antigens (sT), all induced a senescence-associated secretory phenotype (SASP), MCPyV sT uniquely activated noncanonical NF-κB (ncNF-κB), instead of canonical NF-κB signaling, to evade p53-mediated cellular senescence. Through its large T stabilization domain, MCPyV sT activated ncNF-κB signaling both by inducing H3K4 trimethylation-mediated increases of NFKB2 and RELB transcription and also by promoting NFKB2 stabilization and activation through FBXW7 inhibition. Noncanonical NF-κB signaling was required for SASP cytokine secretion, which promoted the proliferation of MCPyV sT-expressing cells through autocrine signaling. Virus-positive MCC cell lines and tumors showed ncNF-κB pathway activation and SASP gene expression, and the inhibition of ncNF-κB signaling prevented VP-MCC cell growth in vitro and in xenografts. We identify MCPyV sT-induced ncNF-κB signaling as an essential tumorigenic pathway in MCC. IMPLICATIONS: This work is the first to identify the activation of ncNF-κB signaling by any polyomavirus and its critical role in MCC tumorigenesis.
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Affiliation(s)
- Jiawei Zhao
- Department of Dermatology, UT Southwestern Medical Center, Dallas, Texas.
| | - Yuemeng Jia
- Children's Research Institute, UT Southwestern Medical Center, Dallas, Texas
| | - Shunli Shen
- Department of Hepatic Surgery, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Jiwoong Kim
- Department of Clinical Science, UT Southwestern Medical Center, Dallas, Texas
| | - Xun Wang
- Children's Research Institute, UT Southwestern Medical Center, Dallas, Texas
| | - Eunice Lee
- Department of Dermatology, UT Southwestern Medical Center, Dallas, Texas
| | - Isaac Brownell
- Cutaneous Development and Carcinogenesis Section, NIAMS, Bethesda, Maryland
| | - Jeong Hee Cho-Vega
- Department of Pathology and Laboratory Medicine, Sylvester Comprehensive Cancer Center and Miller School of Medicine, University of Miami, Miami, Florida
| | - Cheryl Lewis
- Harold C. Simmons Cancer Center, UT Southwestern Medical Center, Dallas, Texas
| | - Jade Homsi
- Harold C. Simmons Cancer Center, UT Southwestern Medical Center, Dallas, Texas.,Department of Internal Medicine, UT Southwestern Medical Center, Dallas, Texas
| | - Rohit R Sharma
- Harold C. Simmons Cancer Center, UT Southwestern Medical Center, Dallas, Texas.,Department of Surgery, UT Southwestern Medical Center, Dallas, Texas
| | - Richard C Wang
- Department of Dermatology, UT Southwestern Medical Center, Dallas, Texas. .,Harold C. Simmons Cancer Center, UT Southwestern Medical Center, Dallas, Texas
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17
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Brunner A, Suryo Rahmanto A, Johansson H, Franco M, Viiliäinen J, Gazi M, Frings O, Fredlund E, Spruck C, Lehtiö J, Rantala JK, Larsson LG, Sangfelt O. PTEN and DNA-PK determine sensitivity and recovery in response to WEE1 inhibition in human breast cancer. eLife 2020; 9:57894. [PMID: 32628111 PMCID: PMC7338058 DOI: 10.7554/elife.57894] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Accepted: 06/22/2020] [Indexed: 12/12/2022] Open
Abstract
Inhibition of WEE1 kinase by AZD1775 has shown promising results in clinical cancer trials, but markers predicting AZD1775 response are lacking. Here we analysed AZD1775 response in a panel of human breast cancer (BC) cell lines by global proteome/transcriptome profiling and identified two groups of basal-like BC (BLBCs): ‘PTEN low’ BLBCs were highly sensitive to AZD1775 and failed to recover following removal of AZD1775, while ‘PTEN high’ BLBCs recovered. AZD1775 induced phosphorylation of DNA-PK, protecting cells from replication-associated DNA damage and promoting cellular recovery. Deletion of DNA-PK or PTEN, or inhibition of DNA-PK sensitized recovering BLBCs to AZD1775 by abrogating replication arrest, allowing replication despite DNA damage. This was linked to reduced CHK1 activation, increased cyclin E levels and apoptosis. In conclusion, we identified PTEN and DNA-PK as essential regulators of replication checkpoint arrest in response to AZD1775 and defined PTEN as a promising biomarker for efficient WEE1 cancer therapy.
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Affiliation(s)
- Andrä Brunner
- Department of Cell and Molecular Biology, Karolinska Institutet, Stockholm, Sweden
| | | | - Henrik Johansson
- Cancer Proteomics Mass Spectrometry, Science for Life Laboratory, Department of Oncology-Pathology, Karolinska Institutet, Stockholm, Sweden
| | - Marcela Franco
- Department of Microbiology, Tumor and Cell biology, Karolinska Institutet, Stockholm, Sweden
| | - Johanna Viiliäinen
- Department of Cell and Molecular Biology, Karolinska Institutet, Stockholm, Sweden
| | - Mohiuddin Gazi
- Department of Cell and Molecular Biology, Karolinska Institutet, Stockholm, Sweden
| | - Oliver Frings
- Cancer Proteomics Mass Spectrometry, Science for Life Laboratory, Department of Oncology-Pathology, Karolinska Institutet, Stockholm, Sweden
| | - Erik Fredlund
- Cancer Proteomics Mass Spectrometry, Science for Life Laboratory, Department of Oncology-Pathology, Karolinska Institutet, Stockholm, Sweden
| | - Charles Spruck
- Tumor Initiation and Maintenance Program, NCI-Designated Cancer Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, United States
| | - Janne Lehtiö
- Cancer Proteomics Mass Spectrometry, Science for Life Laboratory, Department of Oncology-Pathology, Karolinska Institutet, Stockholm, Sweden
| | - Juha K Rantala
- Department of Oncology and Metabolism, University of Sheffield, Sheffield, United Kingdom
| | - Lars-Gunnar Larsson
- Department of Microbiology, Tumor and Cell biology, Karolinska Institutet, Stockholm, Sweden
| | - Olle Sangfelt
- Department of Cell and Molecular Biology, Karolinska Institutet, Stockholm, Sweden
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18
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Piazzi M, Bavelloni A, Faenza I, Blalock W. Glycogen synthase kinase (GSK)-3 and the double-strand RNA-dependent kinase, PKR: When two kinases for the common good turn bad. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2020; 1867:118769. [PMID: 32512016 PMCID: PMC7273171 DOI: 10.1016/j.bbamcr.2020.118769] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 05/29/2020] [Accepted: 05/31/2020] [Indexed: 01/08/2023]
Abstract
Glycogen synthase kinase (GSK)-3α/β and the double-stranded RNA-dependent kinase PKR are two sentinel kinases that carry-out multiple similar yet distinct functions in both the cytosol and the nucleus. While these kinases belong to separate signal transduction cascades, they demonstrate an uncanny propensity to regulate many of the same proteins either through direct phosphorylation or by altering transcription/translation, including: c-MYC, NF-κB, p53 and TAU, as well as each another. A significant number of studies centered on the GSK3 kinases have led to the identification of the GSK3 interactome and a number of substrates, which link GSK3 activity to metabolic control, translation, RNA splicing, ribosome biogenesis, cellular division, DNA repair and stress/inflammatory signaling. Interestingly, many of these same pathways and processes are controlled by PKR, but unlike the GSK3 kinases, a clear picture of proteins interacting with PKR and a complete listing of its substrates is still missing. In this review, we take a detailed look at what is known about the PKR and GSK3 kinases, how these kinases interact to influence common cellular processes (innate immunity, alternative splicing, translation, glucose metabolism) and how aberrant activation of these kinases leads to diseases such as Alzheimer's disease (AD), diabetes mellitus (DM) and cancer. GSK3α/β and PKR are major regulators of cellular homeostasis and the response to stress/inflammation and infection. GSK3α/β and PKR interact with and/or modify many of the same proteins and affect the expression of similar genes. A balance between AKT and PKR nuclear signaling may be responsible for regulating the activation of nuclear GSK3β. GSK3α/β- and PKR-dependent signaling influence major molecular mechanisms of the cell through similar intermediates. Aberrant activation of GSK3α/β and PKR is highly involved in cancer, metabolic disorders, and neurodegenerative diseases.
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Affiliation(s)
- Manuela Piazzi
- Istituto di Genetica Molecolare "Luigi Luca Cavalli-Sforza", Consiglio Nazionale delle Ricerche (IGM-CNR), Bologna, Italy; IRCCS, Istituto Ortopedico Rizzoli, Bologna, Italy
| | - Alberto Bavelloni
- Laboratoria di Oncologia Sperimentale, IRCCS, Istituto Ortopedico Rizzoli, Bologna, Italy
| | - Irene Faenza
- Dipartimento di Scienze Biomediche e Neuromotorie, Università di Bologna, Bologna, Italy
| | - William Blalock
- Istituto di Genetica Molecolare "Luigi Luca Cavalli-Sforza", Consiglio Nazionale delle Ricerche (IGM-CNR), Bologna, Italy; IRCCS, Istituto Ortopedico Rizzoli, Bologna, Italy.
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19
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Urick ME, Bell DW. Proteomic profiling of FBXW7-mutant serous endometrial cancer cells reveals upregulation of PADI2, a potential therapeutic target. Cancer Med 2020; 9:3863-3874. [PMID: 32248654 PMCID: PMC7286459 DOI: 10.1002/cam4.3013] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Revised: 02/29/2020] [Accepted: 03/09/2020] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Despite advancements over the past decade revealing molecular aberrations characteristic of endometrial cancer (EC) subtypes, serous ECs remain difficult to treat and associated with poor outcomes. This is due, in part, to the rarity of these tumors within clinical trials and the inability to directly target the most frequent genomic abnormalities. One of the most commonly somatically mutated genes in serous ECs is the tumor suppressor F-box and WD repeat domain containing 7 (FBXW7). METHODS To identify changes in protein expression associated with FBXW7 mutation, we clustered regularly interspaced short palindromic repeats (CRISPR)-edited ARK4 FBXW7 nonmutant serous EC cells to insert recurrent FBXW7 mutations. We then compared the liquid chromatography tandem mass spectrometry-based proteomic profiles of CRISPR-edited ARK1 and ARK4 serous EC cells to matched parental cells. RESULTS Among distinct total and phosphorylated proteins that were significantly differentially expressed in FBXW7-mutant cell lines compared to matched parental lines, we identified increased PADI2 (peptidyl arginine deiminase 2) expression in all ARK1 and ARK4 CRISPR-edited FBXW7-mutant cell lines. We further confirmed the correlation between FBXW7 mutation and increased PADI2 expression in a third biological background, JHUEM-1 endometrioid EC cells. Finally, we established that PADI2 protein is expressed in primary serous endometrial tumors. CONCLUSION Our findings provide novel insight into proteomic changes associated with FBXW7 mutation in serous ECs and identify PADI2 as a novel potential therapeutic target for these tumors.
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Affiliation(s)
- Mary Ellen Urick
- Cancer Genetics and Comparative Genomics BranchNational Human Genome Research InstituteNational Institutes of HealthBethesdaMDUSA
| | - Daphne W. Bell
- Cancer Genetics and Comparative Genomics BranchNational Human Genome Research InstituteNational Institutes of HealthBethesdaMDUSA
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20
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Examination of the expression levels of MACC1, Filamin A and FBXW7 genes in colorectal cancer patients. North Clin Istanb 2020; 7:1-5. [PMID: 32232196 PMCID: PMC7103745 DOI: 10.14744/nci.2019.26780] [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: 11/21/2018] [Accepted: 02/19/2019] [Indexed: 11/20/2022] Open
Abstract
OBJECTIVE: Colorectal cancer (CRC) is the third most common type of cancer observed in cancer-related mortality because it has a high metastasis ratio. This study aims to investigate the expression levels of several genes, including metastasis-related colon cancer 1 (MACC1), Filamin A (FLNA), F-box/WD repeat-containing protein 7 (FBXW7), which has an important role in cell signaling, migration and adhesion through the remodeling of the cell skeleton. METHODS: In this study, 21 patients with a precise diagnosis of CRC and 21 controls were included. Gene expressions were examined using the RT-PCR technique. To define the relationship of the genes with metastasis, blood samples were collected from all patients with colon/rectal cancer diagnosis without metastasis at six months before and after the medication with Xelox. RESULTS: Our findings showed that no significant difference was observed in the pre-treatment values compared to the control group, whereas FLNA (p=0.001) expression was observed to be significantly increased following treatment with Xelox. CONCLUSION: To our knowledge, our study is the first study to investigate the effects of Xelox treatment on the expression levels of MACC1, FBXW7 and FLNA genes in non-metastatic colorectal cancer patients in Turkey.
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21
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Yumimoto K, Nakayama KI. Recent insight into the role of FBXW7 as a tumor suppressor. Semin Cancer Biol 2020; 67:1-15. [PMID: 32113998 DOI: 10.1016/j.semcancer.2020.02.017] [Citation(s) in RCA: 68] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2019] [Revised: 02/15/2020] [Accepted: 02/26/2020] [Indexed: 12/12/2022]
Abstract
FBXW7 (also known as Fbw7, Sel10, hCDC4, or hAgo) is a tumor suppressor and the most frequently mutated member of the F-box protein family in human cancers. FBXW7 functions as the substrate recognition component of an SCF-type E3 ubiquitin ligase. It specifically controls the proteasome-mediated degradation of many oncoproteins such as c-MYC, NOTCH, KLF5, cyclin E, c-JUN, and MCL1. In this review, we summarize the molecular and biological features of FBXW7 and its substrates as well as the impact of mutations of FBXW7 on cancer development. We also address the clinical potential of anticancer therapy targeting FBXW7.
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Affiliation(s)
- Kanae Yumimoto
- Department of Molecular and Cellular Biology, Medical Institute of Bioregulation, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, Fukuoka, 812-8582, Japan
| | - Keiichi I Nakayama
- Department of Molecular and Cellular Biology, Medical Institute of Bioregulation, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, Fukuoka, 812-8582, Japan.
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22
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Ramezani-Rad P, Leung CR, Apgar JR, Rickert RC. E3 Ubiquitin Ligase Fbw7 Regulates the Survival of Mature B Cells. THE JOURNAL OF IMMUNOLOGY 2020; 204:1535-1542. [PMID: 32005754 DOI: 10.4049/jimmunol.1901156] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Accepted: 01/07/2020] [Indexed: 12/13/2022]
Abstract
Mature naive B cells expressing BCRs of the IgM and IgD isotypes respond to Ag in secondary lymphoid organs. However, the vast majority of B cells do not undergo productive Ag encounter and have finite life spans dependent on survival signals propagated by the BCR and the BAFFR. In this study, we show that the E3 ubiquitin ligase Fbw7 is required for the maintenance of mature B cell populations in mice. BCR stimulation of B cells induced substantial apoptosis along with proliferative and growth defects upon the loss of Fbw7. Analysis of B cell proteomes revealed aberrant signaling patterns, including lower Bcl2 and diminished NF-κB signaling. Further, excessive accumulation of Fbw7 substrate c-Myc, increased Bim expression, and loss of PI3K signaling mediated apoptosis downstream of BCR signaling. In accordance, strong prosurvival signals delivered through ectopic expression of BCL2 in B cells could largely rescue apoptotic cells in the absence of Fbw7. Overall, this study reveals an unexpected role for Fbw7 in the survival and fitness of mature B cells.
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Affiliation(s)
- Parham Ramezani-Rad
- Tumor Microenvironment and Cancer Immunology Program, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA 92037; and National Cancer Institute-Designated Cancer Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA 92037
| | - Charlotte R Leung
- Tumor Microenvironment and Cancer Immunology Program, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA 92037; and National Cancer Institute-Designated Cancer Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA 92037
| | - John R Apgar
- Tumor Microenvironment and Cancer Immunology Program, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA 92037; and National Cancer Institute-Designated Cancer Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA 92037
| | - Robert C Rickert
- Tumor Microenvironment and Cancer Immunology Program, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA 92037; and National Cancer Institute-Designated Cancer Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA 92037
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23
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Lan Q, Wang Y, Sun Z, Li Y, Zhang C, Chang L, Gao Y, Wu J, Wang F, Xu P. Quantitative Proteomics Combined with Two Genetic Strategies for Screening Substrates of Ubiquitin Ligase Hrt3. J Proteome Res 2020; 19:493-502. [PMID: 31789040 DOI: 10.1021/acs.jproteome.9b00673] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Ubiquitin ligases (E3s) serve as key regulators for the ubiquitylation-mediated pathway. The identification of the corresponding relationship between E3 and its substrates is challenging but required for understanding the regulatory network of ubiquitylation. The low abundance of ubiquitinated conjugates and high redundancy of E3 substrate regulation made the screening pretty hard. Herein, we combined SILAC-based quantitative proteomics with two contrary genetic methods (overexpression and knockout) in theory for E3 (Hrt3, the F-box subunit of the SCF complex) substrate screening. The knockout method could not overcome the constraint mentioned above, while the overexpression approach turned on the access to the potential substrates of E3. Subsequently, we obtained 77 candidates, which are involved in many critical biological processes and need to be verified in the future. Within these candidates, we confirmed the relationship between one of the candidates Nce103 and Hrt3 and linked Hrt3 with oxygen sensitivity and oxidative stress response in which Nce103 took part as well. This research is also beneficial for understanding the impact of oxygen supply on regulation of yeast growth through the ubiquitination of Nce103.
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Affiliation(s)
- Qiuyan Lan
- School of Basic Medical Science, Key Laboratory of Combinatorial Biosynthesis and Drug Discovery of Ministry of Education, School of Pharmaceutical Sciences , Wuhan University , Wuhan 430071 , P. R. China.,State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences (Beijing) , Beijing Institute of Lifeomics , Beijing 102206 , P. R. China
| | - Yihao Wang
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences (Beijing) , Beijing Institute of Lifeomics , Beijing 102206 , P. R. China.,Department of Pharmacology and Toxicology , Beijing Institute of Radiation Medicine , Beijing 100850 , P. R. China
| | - Zhen Sun
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences (Beijing) , Beijing Institute of Lifeomics , Beijing 102206 , P. R. China
| | - Yanchang Li
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences (Beijing) , Beijing Institute of Lifeomics , Beijing 102206 , P. R. China
| | - Cheng Zhang
- School of Basic Medical Science, Key Laboratory of Combinatorial Biosynthesis and Drug Discovery of Ministry of Education, School of Pharmaceutical Sciences , Wuhan University , Wuhan 430071 , P. R. China
| | - Lei Chang
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences (Beijing) , Beijing Institute of Lifeomics , Beijing 102206 , P. R. China
| | - Yue Gao
- Department of Pharmacology and Toxicology , Beijing Institute of Radiation Medicine , Beijing 100850 , P. R. China
| | - Junzhu Wu
- School of Basic Medical Science, Key Laboratory of Combinatorial Biosynthesis and Drug Discovery of Ministry of Education, School of Pharmaceutical Sciences , Wuhan University , Wuhan 430071 , P. R. China
| | - Fuqiang Wang
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences (Beijing) , Beijing Institute of Lifeomics , Beijing 102206 , P. R. China
| | - Ping Xu
- School of Basic Medical Science, Key Laboratory of Combinatorial Biosynthesis and Drug Discovery of Ministry of Education, School of Pharmaceutical Sciences , Wuhan University , Wuhan 430071 , P. R. China.,State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences (Beijing) , Beijing Institute of Lifeomics , Beijing 102206 , P. R. China.,Second Clinical Medicine College , Guangzhou University Chinese Medicine , Guangzhou 510120 , P. R. China.,Research Unit of Proteomics & Research and Development of New Drug , Chinese Academy of Medical Sciences , Beijing 100730 , P. R. China
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24
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Nakagawa T, Nakayama K, Nakayama KI. Knockout Mouse Models Provide Insight into the Biological Functions of CRL1 Components. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2020; 1217:147-171. [PMID: 31898227 DOI: 10.1007/978-981-15-1025-0_10] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The CRL1 complex, also known as the SCF complex, is a ubiquitin ligase that in mammals consists of an adaptor protein (SKP1), a scaffold protein (CUL1), a RING finger protein (RBX1, also known as ROC1), and one of about 70 F-box proteins. Given that the F-box proteins determine the substrate specificity of the CRL1 complex, the variety of these proteins allows the generation of a large number of ubiquitin ligases that promote the degradation or regulate the function of many substrate proteins and thereby control numerous key cellular processes. The physiological and pathological functions of these many CRL1 ubiquitin ligases have been studied by the generation and characterization of knockout mouse models that lack specific CRL1 components. In this chapter, we provide a comprehensive overview of these mouse models and discuss the role of each CRL1 component in mouse physiology and pathology.
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Affiliation(s)
- Tadashi Nakagawa
- Division of Cell Proliferation, ART, Graduate School of Medicine, Tohoku University, Sendai, Japan
| | - Keiko Nakayama
- Division of Cell Proliferation, ART, Graduate School of Medicine, Tohoku University, Sendai, Japan.
| | - Keiichi I Nakayama
- Department of Molecular and Cellular Biology, Medical Institute of Bioregulation, Kyushu University, Fukuoka, Japan.
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25
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Chen M, Zhao Z, Meng Q, Liang P, Su Z, Wu Y, Huang J, Cui J. TRIM14 Promotes Noncanonical NF-κB Activation by Modulating p100/p52 Stability via Selective Autophagy. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2020; 7:1901261. [PMID: 31921549 PMCID: PMC6947505 DOI: 10.1002/advs.201901261] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2019] [Revised: 09/29/2019] [Indexed: 05/15/2023]
Abstract
The noncanonical NF-κB signaling pathway plays a critical role in a variety of biological functions including chronic inflammation and tumorigenesis. Activation of noncanonical NF-κB signaling largely relies on the abundance as well as the processing of the NF-κB family member p100/p52. Here, TRIM14 is identified as a novel positive regulator of the noncanonical NF-κB signaling pathway. TRIM14 promotes noncanonical NF-κB activation by targeting p100/p52 in vitro and in vivo. Furthermore, a mechanistic study shows that TRIM14 recruits deubiquitinase USP14 to cleave the K63-linked ubiquitin chains of p100/p52 at multiple sites, thereby preventing p100/p52 from cargo receptor p62-mediated autophagic degradation. TRIM14 deficiency in mice significantly impairs noncanonical NF-κB-mediated inflammatory responses as well as acute colitis and colitis-associated colon cancer development. Taken together, these findings establish the TRIM14-USP14 axis as a crucial checkpoint that controls noncanonical NF-κB signaling and highlight the crosstalk between autophagy and innate immunity.
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Affiliation(s)
- Meixin Chen
- State Key Laboratory of Oncology in South ChinaMOE Key Laboratory of Gene Function and RegulationSchool of Life SciencesSun Yat‐Sen UniversityGuangzhouGuangdong510006China
| | - Zhiyao Zhao
- State Key Laboratory of Oncology in South ChinaMOE Key Laboratory of Gene Function and RegulationSchool of Life SciencesSun Yat‐Sen UniversityGuangzhouGuangdong510006China
- Department of Internal MedicineGuangzhou Institute of PediatricsGuangzhou Women and Children's Medical CenterGuangzhouGuangdong510623China
| | - Qingcai Meng
- State Key Laboratory of Oncology in South ChinaMOE Key Laboratory of Gene Function and RegulationSchool of Life SciencesSun Yat‐Sen UniversityGuangzhouGuangdong510006China
| | - Puping Liang
- State Key Laboratory of Oncology in South ChinaMOE Key Laboratory of Gene Function and RegulationSchool of Life SciencesSun Yat‐Sen UniversityGuangzhouGuangdong510006China
| | - Zexiong Su
- State Key Laboratory of Oncology in South ChinaMOE Key Laboratory of Gene Function and RegulationSchool of Life SciencesSun Yat‐Sen UniversityGuangzhouGuangdong510006China
| | - Yaoxing Wu
- State Key Laboratory of Oncology in South ChinaMOE Key Laboratory of Gene Function and RegulationSchool of Life SciencesSun Yat‐Sen UniversityGuangzhouGuangdong510006China
| | - Junjiu Huang
- State Key Laboratory of Oncology in South ChinaMOE Key Laboratory of Gene Function and RegulationSchool of Life SciencesSun Yat‐Sen UniversityGuangzhouGuangdong510006China
| | - Jun Cui
- State Key Laboratory of Oncology in South ChinaMOE Key Laboratory of Gene Function and RegulationSchool of Life SciencesSun Yat‐Sen UniversityGuangzhouGuangdong510006China
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26
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Systematic analysis of alterations in the ubiquitin proteolysis system reveals its contribution to driver mutations in cancer. ACTA ACUST UNITED AC 2019; 1:122-135. [DOI: 10.1038/s43018-019-0001-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2019] [Accepted: 10/11/2019] [Indexed: 12/21/2022]
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27
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A genome-wide association study explores the genetic determinism of host resistance to Salmonella pullorum infection in chickens. Genet Sel Evol 2019; 51:51. [PMID: 31533607 PMCID: PMC6751821 DOI: 10.1186/s12711-019-0492-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Accepted: 08/29/2019] [Indexed: 12/27/2022] Open
Abstract
Background Salmonella infection is a serious concern in poultry farming because of its impact on both economic loss and human health. Chicks aged 20 days or less are extremely vulnerable to Salmonella pullorum (SP), which causes high mortality. Furthermore, an outbreak of SP infection can result in a considerable number of carriers that become potential transmitters, thus, threatening fellow chickens and offspring. In this study, we conducted a genome-wide association study (GWAS) to detect potential genomic loci and candidate genes associated with two disease-related traits: death and carrier state. Methods In total, 818 birds were phenotyped for death and carrier state traits through a SP challenge experiment, and genotyped by using a 600 K high-density single nucleotide polymorphism (SNP) array. A GWAS using a single-marker linear mixed model was performed with the GEMMA software. RNA-sequencing on spleen samples was carried out for further identification of candidate genes. Results We detected a region that was located between 33.48 and 34.03 Mb on chicken chromosome 4 and was significantly associated with death, with the most significant SNP (rs314483802) accounting for 11.73% of the phenotypic variation. Two candidate genes, FBXW7 and LRBA, were identified as the most promising genes involved in resistance to SP. The expression levels of FBXW7 and LRBA were significantly downregulated after SP infection, which suggests that they may have a role in controlling SP infections. Two other significant loci and related genes (TRAF3 and gga-mir-489) were associated with carrier state, which indicates a different polygenic determinism compared with that of death. In addition, genomic inbreeding coefficients showed no correlation with resistance to SP within each breed in our study. Conclusions The results of this GWAS with a carefully organized Salmonella challenge experiment represent an important milestone in understanding the genetics of infectious disease resistance, offer a theoretical basis for breeding SP-resistant chicken lines using marker-assisted selection, and provide new information for salmonellosis research in humans and other animals.
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28
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Harty BL, Coelho F, Pease-Raissi SE, Mogha A, Ackerman SD, Herbert AL, Gereau RW, Golden JP, Lyons DA, Chan JR, Monk KR. Myelinating Schwann cells ensheath multiple axons in the absence of E3 ligase component Fbxw7. Nat Commun 2019; 10:2976. [PMID: 31278268 PMCID: PMC6611888 DOI: 10.1038/s41467-019-10881-y] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Accepted: 06/05/2019] [Indexed: 01/12/2023] Open
Abstract
In the central nervous system (CNS), oligodendrocytes myelinate multiple axons; in the peripheral nervous system (PNS), Schwann cells (SCs) myelinate a single axon. Why are the myelinating potentials of these glia so fundamentally different? Here, we find that loss of Fbxw7, an E3 ubiquitin ligase component, enhances the myelinating potential of SCs. Fbxw7 mutant SCs make thicker myelin sheaths and sometimes appear to myelinate multiple axons in a fashion reminiscent of oligodendrocytes. Several Fbxw7 mutant phenotypes are due to dysregulation of mTOR; however, the remarkable ability of mutant SCs to ensheathe multiple axons is independent of mTOR signaling. This indicates distinct roles for Fbxw7 in SC biology including modes of axon interactions previously thought to fundamentally distinguish myelinating SCs from oligodendrocytes. Our data reveal unexpected plasticity in the myelinating potential of SCs, which may have important implications for our understanding of both PNS and CNS myelination and myelin repair. The authors find that deletion from Schwann cells of an E3 ubiquitin ligase component called Fbxw7 leads to a phenotype reminiscent of myelination in the central nervous system where a single oligodendrocyte ensheaths multiple axons.
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Affiliation(s)
- Breanne L Harty
- Thaden School, 410 SE Staggerwing Lane, Bentonville, AR, 72712, USA.,Department of Developmental Biology, Washington University School of Medicine, 660S. Euclid Ave., St. Louis, MO, 63110, USA.,Vollum Institute, Oregon Health & Science University, 3181 SW Sam Jackson Park Rd., Portland, OR, 97239, USA
| | - Fernanda Coelho
- Vollum Institute, Oregon Health & Science University, 3181 SW Sam Jackson Park Rd., Portland, OR, 97239, USA
| | - Sarah E Pease-Raissi
- Department of Neurology, Weill Institute for Neuroscience, University of California San Francisco, 675 Nelson Rising Lane, San Francisco, CA, 94158, USA
| | - Amit Mogha
- Vollum Institute, Oregon Health & Science University, 3181 SW Sam Jackson Park Rd., Portland, OR, 97239, USA
| | - Sarah D Ackerman
- Department of Developmental Biology, Washington University School of Medicine, 660S. Euclid Ave., St. Louis, MO, 63110, USA.,Institute of Neuroscience, University of Oregon, 1440 Franklin Blvd., Eugene, OR, 97403, USA
| | - Amy L Herbert
- Department of Developmental Biology, Washington University School of Medicine, 660S. Euclid Ave., St. Louis, MO, 63110, USA.,Department of Developmental Biology, Stanford University, 279W. Campus Dr., Stanford, CA, 94305, USA
| | - Robert W Gereau
- Department of Anesthesiology, Washington University Pain Center, 660S. Euclid Ave., St. Louis, MO, 63110, USA
| | - Judith P Golden
- Department of Anesthesiology, Washington University Pain Center, 660S. Euclid Ave., St. Louis, MO, 63110, USA
| | - David A Lyons
- Centre for Brain Discovery Sciences, MS Society Centre for Translational Research, Euan MacDonald Centre for Motor Neurone Disease Research, University of Edinburgh, 49 Little France Crescent, Edinburgh, EH16 4SB, UK
| | - Jonah R Chan
- Department of Neurology, Weill Institute for Neuroscience, University of California San Francisco, 675 Nelson Rising Lane, San Francisco, CA, 94158, USA
| | - Kelly R Monk
- Department of Developmental Biology, Washington University School of Medicine, 660S. Euclid Ave., St. Louis, MO, 63110, USA. .,Vollum Institute, Oregon Health & Science University, 3181 SW Sam Jackson Park Rd., Portland, OR, 97239, USA.
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29
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Murga-Zamalloa C, Inamdar KV, Wilcox RA. The role of aurora A and polo-like kinases in high-risk lymphomas. Blood Adv 2019; 3:1778-1787. [PMID: 31186254 PMCID: PMC6560346 DOI: 10.1182/bloodadvances.2019000232] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Accepted: 05/16/2019] [Indexed: 02/06/2023] Open
Abstract
High-risk lymphomas (HRLs) are associated with dismal outcomes and remain a therapeutic challenge. Recurrent genetic and molecular alterations, including c-myc expression and aurora A kinase (AAK) and polo-like kinase-1 (PLK1) activation, promote cell proliferation and contribute to the highly aggressive natural history associated with these lymphoproliferative disorders. In addition to its canonical targets regulating mitosis, the AAK/PLK1 axis directly regulates noncanonical targets, including c-myc. Recent studies demonstrate that HRLs, including T-cell lymphomas and many highly aggressive B-cell lymphomas, are dependent upon the AAK/PLK1 axis. Therefore, the AAK/PLK1 axis has emerged as an attractive therapeutic target in these lymphomas. In addition to reviewing these recent findings, we summarize the rationale for targeting AAK/PLK1 in high-risk and c-myc-driven lymphoproliferative disorders.
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Affiliation(s)
- Carlos Murga-Zamalloa
- Division of Hematology-Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor, MI; and
| | | | - Ryan A Wilcox
- Division of Hematology-Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor, MI; and
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30
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Li Y, Yang JY, Xie X, Jie Z, Zhang L, Shi J, Lin D, Gu M, Zhou X, Li HS, Watowich SS, Jain A, Yun Jung S, Qin J, Cheng X, Sun SC. Preventing abnormal NF-κB activation and autoimmunity by Otub1-mediated p100 stabilization. Cell Res 2019; 29:474-485. [PMID: 31086255 DOI: 10.1038/s41422-019-0174-3] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Accepted: 04/11/2019] [Indexed: 01/21/2023] Open
Abstract
NF-κB, a family of transcription factors regulating diverse biological processes including immune responses, is activated by canonical and noncanonical pathways based on degradation of IκBα and processing of the IκB-like protein p100, respectively. Although p100 responds to noncanonical NF-κB stimuli for processing, it does not undergo degradation, but rather becomes accumulated, along with canonical NF-κB activation. We show here that the stability of p100 is tightly controlled by a deubiquitinase, Otub1. Otub1 deficiency not only promotes signal-induced p100 processing and noncanonical NF-κB activation but also causes steady-state p100 degradation, leading to aberrant NF-κB activation in the canonical pathway. B-cell-conditional deletion of Otub1 results in B-cell hyperplasia, antibody hyper-production, and lupus-like autoimmunity. Otub1-deficient B cells display aberrantly activated phenotypes and overproduce the cytokine IL-6, contributing to autoimmunity induction. Thus, maintenance of p100 stability by Otub1 serves as an unusual mechanism of NF-κB regulation that prevents autoimmunity.
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Affiliation(s)
- Yanchuan Li
- Department of Immunology, The University of Texas MD Anderson Cancer Center, 7455 Fannin Street, Box 902, Houston, TX, 77030, USA
| | - Jin-Young Yang
- Department of Immunology, The University of Texas MD Anderson Cancer Center, 7455 Fannin Street, Box 902, Houston, TX, 77030, USA
| | - Xiaoping Xie
- Department of Immunology, The University of Texas MD Anderson Cancer Center, 7455 Fannin Street, Box 902, Houston, TX, 77030, USA
| | - Zuliang Jie
- Department of Immunology, The University of Texas MD Anderson Cancer Center, 7455 Fannin Street, Box 902, Houston, TX, 77030, USA
| | - Lingyun Zhang
- Department of Immunology, The University of Texas MD Anderson Cancer Center, 7455 Fannin Street, Box 902, Houston, TX, 77030, USA.,Center for Reproductive Medicine, Henan Key Laboratory of Reproduction and Genetics, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, 450052, China
| | - Jianhong Shi
- Department of Immunology, The University of Texas MD Anderson Cancer Center, 7455 Fannin Street, Box 902, Houston, TX, 77030, USA.,Central Laboratory, Affiliated Hospital of Hebei University, Baoding, Hebei, 071000, China
| | - Daniel Lin
- Department of Immunology, The University of Texas MD Anderson Cancer Center, 7455 Fannin Street, Box 902, Houston, TX, 77030, USA
| | - Meidi Gu
- Department of Immunology, The University of Texas MD Anderson Cancer Center, 7455 Fannin Street, Box 902, Houston, TX, 77030, USA
| | - Xiaofei Zhou
- Department of Immunology, The University of Texas MD Anderson Cancer Center, 7455 Fannin Street, Box 902, Houston, TX, 77030, USA
| | - Haiyan S Li
- Department of Immunology, The University of Texas MD Anderson Cancer Center, 7455 Fannin Street, Box 902, Houston, TX, 77030, USA
| | - Stephanie S Watowich
- Department of Immunology, The University of Texas MD Anderson Cancer Center, 7455 Fannin Street, Box 902, Houston, TX, 77030, USA.,MD Anderson Cancer Center UTHealth Graduate School of Biomedical Sciences, Houston, TX, 77030, USA
| | - Antrix Jain
- Verna and Marrs McLean Department of Biochemistry and Molecular Biology, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Sung Yun Jung
- Verna and Marrs McLean Department of Biochemistry and Molecular Biology, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Jun Qin
- Verna and Marrs McLean Department of Biochemistry and Molecular Biology, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Xuhong Cheng
- Department of Immunology, The University of Texas MD Anderson Cancer Center, 7455 Fannin Street, Box 902, Houston, TX, 77030, USA
| | - Shao-Cong Sun
- Department of Immunology, The University of Texas MD Anderson Cancer Center, 7455 Fannin Street, Box 902, Houston, TX, 77030, USA. .,MD Anderson Cancer Center UTHealth Graduate School of Biomedical Sciences, Houston, TX, 77030, USA.
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Wang Y, An Y, Ma Y, Guo J. F-box/WD-40 repeat-containing protein 7: A potential target in the progression and treatment of gastrointestinal malignancy. Oncol Lett 2019; 17:3625-3634. [PMID: 30881487 PMCID: PMC6403509 DOI: 10.3892/ol.2019.10036] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2018] [Accepted: 01/21/2019] [Indexed: 12/21/2022] Open
Abstract
Cancer is a principal cause of human morbidity and mortality, with gastrointestinal malignancies, in particular, resulting in a marked number of tumor-associated mortalities. The progression of gastrointestinal malignancy is regulated by a variety of aberrantly expressed proteins, a number of which facilitate tumor progression, whereas, others function as tumor suppressors. The detection of such proteins not only contributes to the early diagnosis of cancer, they may additionally serve as potential therapeutic targets. In normal tissues, numerous proteins encoded by proto-oncoproteins are degraded by ubiquitylation enzymes, consisting of F-box/WD-40 repeat-containing protein 7 (Fbw7) and other proteins, thus avoiding tumorigenesis and maintaining homeostasis. In tumor tissues, the downregulation of Fbw7, caused by various factors, leads to disorders in ubiquitinase synthesis, which may induce tumor progression and chemoresistance, particularly in gastrointestinal malignancy. Therefore, an in-depth study of the regulatory mechanisms involved in disorders of Fbw7 expression and the role of Fbw7 in chemoresistance of gastrointestinal tumors may suggest improvements for early diagnostic screening and targeted therapy.
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Affiliation(s)
- Yizhi Wang
- Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, P.R. China
| | - Yang An
- Department of Anesthesia, First Hospital of China Medical University, Shenyang, Liaoning 110001, P.R. China
| | - Yi Ma
- Department of Thoracic Surgery, First Hospital of China Medical University, Shenyang, Liaoning 110001, P.R. China
| | - Junchao Guo
- Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, P.R. China
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32
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FBXW7 in Cancer: What Has Been Unraveled Thus Far? Cancers (Basel) 2019; 11:cancers11020246. [PMID: 30791487 PMCID: PMC6406609 DOI: 10.3390/cancers11020246] [Citation(s) in RCA: 115] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Revised: 02/07/2019] [Accepted: 02/11/2019] [Indexed: 12/14/2022] Open
Abstract
: The FBXW7 (F-box with 7 tandem WD40) protein encoded by the gene FBXW7 is one of the crucial components of ubiquitin ligase called Skp1-Cullin1-F-box (SCF) complex that aids in the degradation of many oncoproteins via the ubiquitin-proteasome system (UPS) thus regulating cellular growth. FBXW7 is considered as a potent tumor suppressor as most of its target substrates can function as potential growth promoters, including c-Myc, Notch, cyclin E, c-JUN, and KLF5. Its regulators include p53, C/EBP-δ, Numb, microRNAs, Pin 1, Hes-5, BMI1, Ebp2. Mounting evidence has indicated the involvement of aberrant expression of FBXW7 for tumorigenesis. Moreover, numerous studies have also shown its role in cancer cell chemosensitization, thereby demonstrating the importance of FBXW7 in the development of curative cancer therapy. This comprehensive review emphasizes on the targets, functions, regulators and expression of FBXW7 in different cancers and its involvement in sensitizing cancer cells to chemotherapeutic drugs.
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33
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FBXW7 mutations reduce binding of NOTCH1, leading to cleaved NOTCH1 accumulation and target gene activation in CLL. Blood 2018; 133:830-839. [PMID: 30510140 DOI: 10.1182/blood-2018-09-874529] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2018] [Accepted: 11/13/2018] [Indexed: 12/15/2022] Open
Abstract
NOTCH1 is mutated in 10% of chronic lymphocytic leukemia (CLL) patients and is associated with poor outcome. However, NOTCH1 activation is identified in approximately one-half of CLL cases even in the absence of NOTCH1 mutations. Hence, there appear to be additional factors responsible for the impairment of NOTCH1 degradation. E3-ubiquitin ligase F-box and WD40 repeat domain containing-7 (FBXW7), a negative regulator of NOTCH1, is mutated in 2% to 6% of CLL patients. The functional consequences of these mutations in CLL are unknown. We found heterozygous FBXW7 mutations in 36 of 905 (4%) untreated CLL patients. The majority were missense mutations (78%) that mostly affected the WD40 substrate binding domain; 10% of mutations occurred in the first exon of the α-isoform. To identify target proteins of FBXW7 in CLL, we truncated the WD40 domain in CLL cell line HG-3 via clustered regularly interspaced short palindromic repeats (CRISPR)/CRISPR-associated protein-9 (Cas9). Homozygous truncation of FBXW7 resulted in an increase of activated NOTCH1 intracellular domain (NICD) and c-MYC protein levels as well as elevated hypoxia-inducible factor 1-α activity. In silico modeling predicted that novel mutations G423V and W425C in the FBXW7-WD40 domain change the binding of protein substrates. This differential binding was confirmed via coimmunoprecipitation of overexpressed FBXW7 and NOTCH1. In primary CLL cells harboring FBXW7 mutations, activated NICD levels were increased and remained stable upon translation inhibition. FBXW7 mutations coincided with an increase in NOTCH1 target gene expression and explain a proportion of patients characterized by dysregulated NOTCH1 signaling.
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34
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Yeh CH, Bellon M, Nicot C. FBXW7: a critical tumor suppressor of human cancers. Mol Cancer 2018; 17:115. [PMID: 30086763 PMCID: PMC6081812 DOI: 10.1186/s12943-018-0857-2] [Citation(s) in RCA: 308] [Impact Index Per Article: 51.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Accepted: 07/16/2018] [Indexed: 12/14/2022] Open
Abstract
The ubiquitin-proteasome system (UPS) is involved in multiple aspects of cellular processes, such as cell cycle progression, cellular differentiation, and survival (Davis RJ et al., Cancer Cell 26:455-64, 2014; Skaar JR et al., Nat Rev Drug Discov 13:889-903, 2014; Nakayama KI and Nakayama K, Nat Rev Cancer 6:369-81, 2006). F-box and WD repeat domain containing 7 (FBXW7), also known as Sel10, hCDC4 or hAgo, is a member of the F-box protein family, which functions as the substrate recognition component of the SCF E3 ubiquitin ligase. FBXW7 is a critical tumor suppressor and one of the most commonly deregulated ubiquitin-proteasome system proteins in human cancer. FBXW7 controls proteasome-mediated degradation of oncoproteins such as cyclin E, c-Myc, Mcl-1, mTOR, Jun, Notch and AURKA. Consistent with the tumor suppressor role of FBXW7, it is located at chromosome 4q32, a genomic region deleted in more than 30% of all human cancers (Spruck CH et al., Cancer Res 62:4535-9, 2002). Genetic profiles of human cancers based on high-throughput sequencing have revealed that FBXW7 is frequently mutated in human cancers. In addition to genetic mutations, other mechanisms involving microRNA, long non-coding RNA, and specific oncogenic signaling pathways can inactivate FBXW7 functions in cancer cells. In the following sections, we will discuss the regulation of FBXW7, its role in oncogenesis, and the clinical implications and prognostic value of loss of function of FBXW7 in human cancers.
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Affiliation(s)
- Chien-Hung Yeh
- Department of Pathology and Laboratory Medicine, Center for Viral Pathogenesis, University of Kansas Medical Center, 3901 Rainbow Boulevard, Kansas City, KS, 66160, USA
| | - Marcia Bellon
- Department of Pathology and Laboratory Medicine, Center for Viral Pathogenesis, University of Kansas Medical Center, 3901 Rainbow Boulevard, Kansas City, KS, 66160, USA
| | - Christophe Nicot
- Department of Pathology and Laboratory Medicine, Center for Viral Pathogenesis, University of Kansas Medical Center, 3901 Rainbow Boulevard, Kansas City, KS, 66160, USA.
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35
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Zhao J, Xiong X, Li Y, Liu X, Wang T, Zhang H, Jiao Y, Jiang J, Zhang H, Tang Q, Gao X, Li X, Lu Y, Liu B, Hu C, Li X. Hepatic F-Box Protein FBXW7 Maintains Glucose Homeostasis Through Degradation of Fetuin-A. Diabetes 2018; 67:818-830. [PMID: 29475832 DOI: 10.2337/db17-1348] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Accepted: 02/12/2018] [Indexed: 11/13/2022]
Abstract
Type 2 diabetes mellitus (T2DM) has become one of the most serious and long-term threats to human health. However, the molecular mechanism that links obesity to insulin resistance remains largely unknown. Here, we show that F-box and WD repeat domain-containing 7 (FBXW7), an E3 ubiquitin protein ligase, is markedly downregulated in the liver of two obese mouse models and obese human subjects. We further identify a functional low-frequency human FBXW7 coding variant (p.Ala204Thr) in the Chinese population, which is associated with elevated blood glucose and T2DM risk. Notably, mice with liver-specific knockout of FBXW7 develop hyperglycemia, glucose intolerance, and insulin resistance even on a normal chow diet. Conversely, overexpression of FBXW7 in the liver not only prevents the development of high-fat diet-induced insulin resistance but also attenuates the disease signature of obese mice. Mechanistically, FBXW7 directly binds to hepatokine fetuin-A to induce its ubiquitination and subsequent proteasomal degradation, comprising an important mechanism maintaining glucose homeostasis. Thus, we provide evidence showing a beneficial role of FBXW7 in glucose homeostasis.
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Affiliation(s)
- Jiejie Zhao
- Ministry of Education Key Laboratory of Metabolism and Molecular Medicine, Department of Endocrinology and Metabolism, Zhongshan Hospital, Fudan University, Shanghai, China
- Shanghai Institute of Endocrinology and Metabolism, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xuelian Xiong
- Ministry of Education Key Laboratory of Metabolism and Molecular Medicine, Department of Endocrinology and Metabolism, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Yao Li
- Department of Laboratory Animal Science, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xing Liu
- Ministry of Education Key Laboratory of Metabolism and Molecular Medicine, Department of Endocrinology and Metabolism, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Tao Wang
- Department of Endocrinology and Metabolism, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, and Shanghai Diabetes Institute, Shanghai Key Laboratory of Diabetes Mellitus, Shanghai Clinical Center for Diabetes, Shanghai, China
| | - Hong Zhang
- Department of Endocrinology and Metabolism, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, and Shanghai Diabetes Institute, Shanghai Key Laboratory of Diabetes Mellitus, Shanghai Clinical Center for Diabetes, Shanghai, China
| | - Yang Jiao
- Shanghai Institute of Endocrinology and Metabolism, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Jingjing Jiang
- Ministry of Education Key Laboratory of Metabolism and Molecular Medicine, Department of Endocrinology and Metabolism, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Huijie Zhang
- Department of Endocrinology and Metabolism, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Qiqun Tang
- Ministry of Education Key Laboratory of Metabolism and Molecular Medicine, Department of Endocrinology and Metabolism, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Xin Gao
- Ministry of Education Key Laboratory of Metabolism and Molecular Medicine, Department of Endocrinology and Metabolism, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Xuejun Li
- Department of Endocrinology and Diabetes, The First Affiliated Hospital of Xiamen University, Xiamen, China
| | - Yan Lu
- Ministry of Education Key Laboratory of Metabolism and Molecular Medicine, Department of Endocrinology and Metabolism, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Bin Liu
- Ministry of Education Key Laboratory of Metabolism and Molecular Medicine, Department of Endocrinology and Metabolism, Zhongshan Hospital, Fudan University, Shanghai, China
- Hubei Key Laboratory for Kidney Disease Pathogenesis and Intervention, Huangshi Central Hospital of Edong Healthcare Group, Hubei Polytechnic University School of Medicine, Huangshi, Hubei, China
| | - Cheng Hu
- Department of Endocrinology and Metabolism, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, and Shanghai Diabetes Institute, Shanghai Key Laboratory of Diabetes Mellitus, Shanghai Clinical Center for Diabetes, Shanghai, China
- Fengxian Central Hospital, Affiliated Hospital of Southern Medical University, Shanghai, China
| | - Xiaoying Li
- Ministry of Education Key Laboratory of Metabolism and Molecular Medicine, Department of Endocrinology and Metabolism, Zhongshan Hospital, Fudan University, Shanghai, China
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36
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Li H, Liang Y, Lai X, Wang W, Zhang J, Chen S. Genetic Deletion of Fbw7 in the mouse intestinal epithelium aggravated dextran sodium sulfate-induced colitis by modulating the inflammatory response of NF-κB pathway. Biochem Biophys Res Commun 2018; 498:869-876. [PMID: 29550488 DOI: 10.1016/j.bbrc.2018.03.072] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2018] [Accepted: 03/09/2018] [Indexed: 12/19/2022]
Abstract
Fbw7 is a type of E3 ubiquitin ligase that targets various proteins for degradation and has been found to have a high expression level in progenitor cells. Deletion of Fbw7 in the intestine results in the accumulation of progenitor cells. Moreover, Fbw7 loss increases the susceptibility of colorectal cancer. However, the involvement of Fbw7 in the progress and development of inflammatory bowel disease (IBD) is still controversial. To identify the function of Fbw7 on dextran sodium sulfate (DSS)-induced colonic inflammation, we generated Fbw7ΔG mice, lacking Fbw7 specifically in intestinal epithelium. Colitis was induced in male Fbw7 ΔG and wild-type (WT) mice (both age and body weight matched) by treating with 3% DSS in drinking water. We demonstrate that deletion of Fbw7 in the mouse intestinal epithelium aggravates DSS-induced colitis, showing inflammatory response and reduced survival rate. Furthermore, we found that Fbw7 loss caused activation of NF-κB signaling. Thus, FBW7 plays a protective role in acute intestinal inflammation by modulating the inflammatory response of NF-κB pathway.
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Affiliation(s)
- Huichen Li
- The State Key Laboratory of Cancer Biology, Department of Biochemistry and Molecular Biology, School of Basic Medicine, The Fourth Military Medical University, 169 Changle Road, Xi'an, 710032, China
| | - Ye Liang
- The State Key Laboratory of Cancer Biology, Department of Biochemistry and Molecular Biology, School of Basic Medicine, The Fourth Military Medical University, 169 Changle Road, Xi'an, 710032, China
| | - Xiaofeng Lai
- The State Key Laboratory of Cancer Biology, Department of Biochemistry and Molecular Biology, School of Basic Medicine, The Fourth Military Medical University, 169 Changle Road, Xi'an, 710032, China
| | - Weidong Wang
- The State Key Laboratory of Cancer Biology, Department of Biochemistry and Molecular Biology, School of Basic Medicine, The Fourth Military Medical University, 169 Changle Road, Xi'an, 710032, China
| | - Jiang Zhang
- The State Key Laboratory of Cancer Biology, Department of Biochemistry and Molecular Biology, School of Basic Medicine, The Fourth Military Medical University, 169 Changle Road, Xi'an, 710032, China.
| | - Suning Chen
- Department of Pharmacy, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi 710032, China.
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Ullah K, Rosendahl AH, Izzi V, Bergmann U, Pihlajaniemi T, Mäki JM, Myllyharju J. Hypoxia-inducible factor prolyl-4-hydroxylase-1 is a convergent point in the reciprocal negative regulation of NF-κB and p53 signaling pathways. Sci Rep 2017; 7:17220. [PMID: 29222481 PMCID: PMC5722952 DOI: 10.1038/s41598-017-17376-0] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2016] [Accepted: 11/24/2017] [Indexed: 12/14/2022] Open
Abstract
Hypoxia-inducible factor 1α (HIF1α) induces the expression of several hundred genes in hypoxia aiming at restoration of oxygen homeostasis. HIF prolyl-4-hydroxylases (HIF-P4Hs) regulate the stability of HIF1α in an oxygen-dependent manner. Hypoxia is a common feature in inflammation and cancer and the HIF pathway is closely linked with the inflammatory NF-κB and tumor suppressor p53 pathways. Here we show that genetic inactivation or chemical inhibition of HIF-P4H-1 leads to downregulation of proinflammatory genes, while proapoptotic genes are upregulated. HIF-P4H-1 inactivation reduces the inflammatory response under LPS stimulus in vitro and in an acute skin inflammation model in vivo. Furthermore, HIF-P4H-1 inactivation increases p53 activity and stability and hydroxylation of proline 142 in p53 has an important role in this regulation. Altogether, our data suggest that HIF-P4H-1 inhibition may be a promising therapeutic candidate for inflammatory diseases and cancer, enhancing the reciprocal negative regulation of the NF-κB and p53 pathways.
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Affiliation(s)
- Karim Ullah
- Oulu Center for Cell-Matrix Research, University of Oulu, Oulu, FIN-90014, Finland.,Biocenter Oulu, University of Oulu, Oulu, FIN-90014, Finland.,Faculty of Biochemistry and Molecular Medicine, University of Oulu, Oulu, FIN-90014, Finland
| | - Ann-Helen Rosendahl
- Oulu Center for Cell-Matrix Research, University of Oulu, Oulu, FIN-90014, Finland.,Biocenter Oulu, University of Oulu, Oulu, FIN-90014, Finland.,Faculty of Biochemistry and Molecular Medicine, University of Oulu, Oulu, FIN-90014, Finland
| | - Valerio Izzi
- Oulu Center for Cell-Matrix Research, University of Oulu, Oulu, FIN-90014, Finland.,Biocenter Oulu, University of Oulu, Oulu, FIN-90014, Finland.,Faculty of Biochemistry and Molecular Medicine, University of Oulu, Oulu, FIN-90014, Finland
| | - Ulrich Bergmann
- Biocenter Oulu, University of Oulu, Oulu, FIN-90014, Finland
| | - Taina Pihlajaniemi
- Oulu Center for Cell-Matrix Research, University of Oulu, Oulu, FIN-90014, Finland.,Biocenter Oulu, University of Oulu, Oulu, FIN-90014, Finland.,Faculty of Biochemistry and Molecular Medicine, University of Oulu, Oulu, FIN-90014, Finland
| | - Joni M Mäki
- Oulu Center for Cell-Matrix Research, University of Oulu, Oulu, FIN-90014, Finland.,Biocenter Oulu, University of Oulu, Oulu, FIN-90014, Finland.,Faculty of Biochemistry and Molecular Medicine, University of Oulu, Oulu, FIN-90014, Finland
| | - Johanna Myllyharju
- Oulu Center for Cell-Matrix Research, University of Oulu, Oulu, FIN-90014, Finland. .,Biocenter Oulu, University of Oulu, Oulu, FIN-90014, Finland. .,Faculty of Biochemistry and Molecular Medicine, University of Oulu, Oulu, FIN-90014, Finland.
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38
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Zaky W, Manton C, Miller CP, Khatua S, Gopalakrishnan V, Chandra J. The ubiquitin-proteasome pathway in adult and pediatric brain tumors: biological insights and therapeutic opportunities. Cancer Metastasis Rev 2017; 36:617-633. [PMID: 29071526 DOI: 10.1007/s10555-017-9700-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Nearly 20 years ago, the concept of targeting the proteasome for cancer therapy began gaining momentum. This concept was driven by increased understanding of the biology/structure and function of the 26S proteasome, insight into the role of the proteasome in transformed cells, and the synthesis of pharmacological inhibitors with clinically favorable features. Subsequent in vitro, in vivo, and clinical testing culminated in the FDA approval of three proteasome inhibitors-bortezomib, carfilzomib, and ixazomib -for specific hematological malignancies. However, despite in vitro and in vivo studies pointing towards efficacy in solid tumors, clinical responses broadly have been evasive. For brain tumors, a malignancy in dire need of new approaches both in adult and pediatric patients, this has also been the case. Elucidation of proteasome-dependent processes in specific types of brain tumors, the evolution of newer proteasome targeting strategies, and the use of proteasome inhibitors in combination strategies will clarify how these agents can be leveraged more effectively to treat central nervous system malignancies. Since brain tumors represent a heterogeneous subset of solid tumors, and in particular, pediatric brain tumors possess distinct biology from adult brain tumors, tailoring of proteasome inhibitor-based strategies to specific subtypes of these tumors will be critical for advancing care for affected patients, and will be discussed in this review.
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Affiliation(s)
- Wafik Zaky
- Children's Cancer Hospital, Division of Pediatrics, University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd, Houston, TX, 77030, USA
| | - Christa Manton
- Children's Cancer Hospital, Division of Pediatrics, University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd, Houston, TX, 77030, USA
| | - Claudia P Miller
- Children's Cancer Hospital, Division of Pediatrics, University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd, Houston, TX, 77030, USA
| | - Soumen Khatua
- Children's Cancer Hospital, Division of Pediatrics, University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd, Houston, TX, 77030, USA
| | - Vidya Gopalakrishnan
- Children's Cancer Hospital, Division of Pediatrics, University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd, Houston, TX, 77030, USA
| | - Joya Chandra
- Children's Cancer Hospital, Division of Pediatrics, University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd, Houston, TX, 77030, USA.
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39
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Zhang L, MacIsaac KD, Zhou T, Huang PY, Xin C, Dobson JR, Yu K, Chiang DY, Fan Y, Pelletier M, Wang Y, Jaeger S, Krishnamurthy Radhakrishnan V, JeBailey L, Skewes-Cox P, Zhang J, Fang W, Huang Y, Zhao H, Zhao Y, Li E, Peng B, Huang A, Dranoff G, Hammerman PS, Engelman J, Bitter H, Zeng YX, Yao Y. Genomic Analysis of Nasopharyngeal Carcinoma Reveals TME-Based Subtypes. Mol Cancer Res 2017; 15:1722-1732. [DOI: 10.1158/1541-7786.mcr-17-0134] [Citation(s) in RCA: 74] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Revised: 06/29/2017] [Accepted: 08/23/2017] [Indexed: 11/16/2022]
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40
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Bekker-Jensen DB, Kelstrup CD, Batth TS, Larsen SC, Haldrup C, Bramsen JB, Sørensen KD, Høyer S, Ørntoft TF, Andersen CL, Nielsen ML, Olsen JV. An Optimized Shotgun Strategy for the Rapid Generation of Comprehensive Human Proteomes. Cell Syst 2017; 4:587-599.e4. [PMID: 28601559 PMCID: PMC5493283 DOI: 10.1016/j.cels.2017.05.009] [Citation(s) in RCA: 305] [Impact Index Per Article: 43.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2017] [Revised: 03/03/2017] [Accepted: 05/11/2017] [Indexed: 01/08/2023]
Abstract
This study investigates the challenge of comprehensively cataloging the complete human proteome from a single-cell type using mass spectrometry (MS)-based shotgun proteomics. We modify a classical two-dimensional high-resolution reversed-phase peptide fractionation scheme and optimize a protocol that provides sufficient peak capacity to saturate the sequencing speed of modern MS instruments. This strategy enables the deepest proteome of a human single-cell type to date, with the HeLa proteome sequenced to a depth of ∼584,000 unique peptide sequences and ∼14,200 protein isoforms (∼12,200 protein-coding genes). This depth is comparable with next-generation RNA sequencing and enables the identification of post-translational modifications, including ∼7,000 N-acetylation sites and ∼10,000 phosphorylation sites, without the need for enrichment. We further demonstrate the general applicability and clinical potential of this proteomics strategy by comprehensively quantifying global proteome expression in several different human cancer cell lines and patient tissue samples. Multi-shot proteomics quantifies the protein levels of 12,200+ genes in HeLa cells This essentially complete HeLa proteome has coverage similar to next-gen RNA-seq Deep coverage of major PTMs is achieved without specific enrichment The approach is extendable to other human cell lines and patient samples
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Affiliation(s)
- Dorte B Bekker-Jensen
- Proteomics Program, Faculty of Health and Medical Sciences, Novo Nordisk Foundation Center for Protein Research, University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen, Denmark
| | - Christian D Kelstrup
- Proteomics Program, Faculty of Health and Medical Sciences, Novo Nordisk Foundation Center for Protein Research, University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen, Denmark.
| | - Tanveer S Batth
- Proteomics Program, Faculty of Health and Medical Sciences, Novo Nordisk Foundation Center for Protein Research, University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen, Denmark
| | - Sara C Larsen
- Proteomics Program, Faculty of Health and Medical Sciences, Novo Nordisk Foundation Center for Protein Research, University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen, Denmark
| | - Christa Haldrup
- Departments of Molecular Medicine and Clinical Medicine, Aarhus University Hospital, Aarhus University, Palle Juul-Jensens Boulevard 99, 8200 Aarhus, Denmark
| | - Jesper B Bramsen
- Departments of Molecular Medicine and Clinical Medicine, Aarhus University Hospital, Aarhus University, Palle Juul-Jensens Boulevard 99, 8200 Aarhus, Denmark
| | - Karina D Sørensen
- Departments of Molecular Medicine and Clinical Medicine, Aarhus University Hospital, Aarhus University, Palle Juul-Jensens Boulevard 99, 8200 Aarhus, Denmark
| | - Søren Høyer
- Institute of Pathology, Aarhus University Hospital, Palle Juul-Jensens Boulevard 99, 8200 Aarhus, Denmark
| | - Torben F Ørntoft
- Departments of Molecular Medicine and Clinical Medicine, Aarhus University Hospital, Aarhus University, Palle Juul-Jensens Boulevard 99, 8200 Aarhus, Denmark
| | - Claus L Andersen
- Departments of Molecular Medicine and Clinical Medicine, Aarhus University Hospital, Aarhus University, Palle Juul-Jensens Boulevard 99, 8200 Aarhus, Denmark
| | - Michael L Nielsen
- Proteomics Program, Faculty of Health and Medical Sciences, Novo Nordisk Foundation Center for Protein Research, University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen, Denmark
| | - Jesper V Olsen
- Proteomics Program, Faculty of Health and Medical Sciences, Novo Nordisk Foundation Center for Protein Research, University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen, Denmark.
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Yao S, Xu F, Chen Y, Ge Y, Zhang F, Huang H, Li L, Lin D, Luo X, Xu J, Luo D, Zhu X, Liu Y. Fbw7 regulates apoptosis in activated B-cell like diffuse large B-cell lymphoma by targeting Stat3 for ubiquitylation and degradation. JOURNAL OF EXPERIMENTAL & CLINICAL CANCER RESEARCH : CR 2017; 36:10. [PMID: 28069035 PMCID: PMC5223361 DOI: 10.1186/s13046-016-0476-y] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/20/2016] [Accepted: 12/14/2016] [Indexed: 01/10/2023]
Abstract
Background The ubiquitin-ligase Fbw7 acts as a tumor suppressor, targeting lots of proto-oncogenes for proteolysis. However, the exact role of Fbw7 in diffuse large B-cell lymphoma (DLBCL) development remains unclear. Methods We evaluated Fbw7 expression in patient samples of DLBCL using immunohistochemical staining. The effect of Fbw7 overexpression on cell viability and apoptosis was investigated using activated B-cell (ABC) like DLBCL cell lines. The mechanism of Fbw7 activity in DLBCL was investigated using immunoprecipitation, ubiquitination, western blot and qualitative analyses. Results The non-germinal center B-cell-like subtype of DLBCL showed reduced Fbw7 expression compared with the germinal center B-cell (GBC) subtype, and low Fbw7 expression was associated with a worse prognosis. Fbw7 overexpression caused decreased cell viability and increased apoptosis rates in the ABC-DLBCL cell lines SU-DHL-2 and OCI-LY-3. Importantly, Stat3 and phospho-Stat3Tyr705 stability were reduced following Fbw7 overexpression in ABC-DLBCL cell lines. In HEK293T and SU-DHL-2 cells, we demonstrated that Fbw7 interacts with Stat3 and pStat3Tyr705 to regulate their ubiquitylation and degradation. Downstream anti-apoptotic target genes of activated Stat3, including Myc, Survivin, Mcl-1, Pim-1, Bcl-2 and Bcl-xl showed decreased mRNA expression following exogenous Fbw7 overexpression. The negative relationship between Fbw7 and pStat3Tyr705 levels was also confirmed in DLBCL patient samples. Conclusion The ubiquitin-ligase Fbw7 mediates apoptosis through targeting Stat3 for ubiquitylation and degradation in ABC-DLBCL. Thus, our study may offer a promising approach for ABC-DLBCL therapy through Stat3 inhibition. Electronic supplementary material The online version of this article (doi:10.1186/s13046-016-0476-y) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Su Yao
- Department of Pathology, Guangdong General Hospital & Guangdong Academy of Medical Sciences, Guangzhou, Guangdong, 510080, People's Republic of China
| | - Fangping Xu
- Department of Pathology, Guangdong General Hospital & Guangdong Academy of Medical Sciences, Guangzhou, Guangdong, 510080, People's Republic of China
| | - Yu Chen
- Department of Pathology, Guangdong General Hospital & Guangdong Academy of Medical Sciences, Guangzhou, Guangdong, 510080, People's Republic of China
| | - Yan Ge
- Department of Pathology, Guangdong General Hospital & Guangdong Academy of Medical Sciences, Guangzhou, Guangdong, 510080, People's Republic of China
| | - Fen Zhang
- Department of Pathology, Guangdong General Hospital & Guangdong Academy of Medical Sciences, Guangzhou, Guangdong, 510080, People's Republic of China
| | - Huijie Huang
- Department of Pathology, Dongguan People's Hospital, Dongguan, Guangdong, 523059, People's Republic of China
| | - Li Li
- Department of Pathology, Guangdong General Hospital & Guangdong Academy of Medical Sciences, Guangzhou, Guangdong, 510080, People's Republic of China
| | - Danyi Lin
- Department of Pathology, Guangdong General Hospital & Guangdong Academy of Medical Sciences, Guangzhou, Guangdong, 510080, People's Republic of China
| | - Xinlan Luo
- Department of Pathology, Guangdong General Hospital & Guangdong Academy of Medical Sciences, Guangzhou, Guangdong, 510080, People's Republic of China
| | - Jie Xu
- Department of Pathology, Guangdong General Hospital & Guangdong Academy of Medical Sciences, Guangzhou, Guangdong, 510080, People's Republic of China
| | - Donglan Luo
- Department of Pathology, Guangdong General Hospital & Guangdong Academy of Medical Sciences, Guangzhou, Guangdong, 510080, People's Republic of China
| | - Xiaolan Zhu
- Department of Pathology, Guangdong General Hospital & Guangdong Academy of Medical Sciences, Guangzhou, Guangdong, 510080, People's Republic of China
| | - Yanhui Liu
- Department of Pathology, Guangdong General Hospital & Guangdong Academy of Medical Sciences, Guangzhou, Guangdong, 510080, People's Republic of China.
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42
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Suryo Rahmanto A, Swartling FJ, Sangfelt O. Targeting SOX9 for degradation to inhibit chemoresistance, metastatic spread, and recurrence. Mol Cell Oncol 2016; 4:e1252871. [PMID: 28197531 DOI: 10.1080/23723556.2016.1252871] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2016] [Revised: 10/20/2016] [Accepted: 10/20/2016] [Indexed: 10/20/2022]
Abstract
Cancer cells with stem-like properties are believed to contribute to treatment resistance, dissemination, and recurrence. SOX9 controls stem cell plasticity and its deregulation may provide a basis for tumor progression. Here, we summarize our findings of targeted SOX9 destruction by SCFFBW7 (Skp1/Cul1/F-box) in medulloblastoma and its potential for therapeutic intervention.
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Affiliation(s)
| | - Fredrik J Swartling
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Rudbeck Laboratory, Uppsala University , Uppsala, Sweden
| | - Olle Sangfelt
- Department of Cell and Molecular Biology, Karolinska Institute , Stockholm, Sweden
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43
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Suryo Rahmanto A, Savov V, Brunner A, Bolin S, Weishaupt H, Malyukova A, Rosén G, Čančer M, Hutter S, Sundström A, Kawauchi D, Jones DT, Spruck C, Taylor MD, Cho YJ, Pfister SM, Kool M, Korshunov A, Swartling FJ, Sangfelt O. FBW7 suppression leads to SOX9 stabilization and increased malignancy in medulloblastoma. EMBO J 2016; 35:2192-2212. [PMID: 27625374 PMCID: PMC5069553 DOI: 10.15252/embj.201693889] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2016] [Accepted: 08/18/2016] [Indexed: 12/02/2022] Open
Abstract
SOX9 is a master transcription factor that regulates development and stem cell programs. However, its potential oncogenic activity and regulatory mechanisms that control SOX9 protein stability are poorly understood. Here, we show that SOX9 is a substrate of FBW7, a tumor suppressor, and a SCF (SKP1/CUL1/F‐box)‐type ubiquitin ligase. FBW7 recognizes a conserved degron surrounding threonine 236 (T236) in SOX9 that is phosphorylated by GSK3 kinase and consequently degraded by SCFFBW7α. Failure to degrade SOX9 promotes migration, metastasis, and treatment resistance in medulloblastoma, one of the most common childhood brain tumors. FBW7 is either mutated or downregulated in medulloblastoma, and in cases where FBW7 mRNA levels are low, SOX9 protein is significantly elevated and this phenotype is associated with metastasis at diagnosis and poor patient outcome. Transcriptional profiling of medulloblastoma cells expressing a degradation‐resistant SOX9 mutant reveals activation of pro‐metastatic genes and genes linked to cisplatin resistance. Finally, we show that pharmacological inhibition of PI3K/AKT/mTOR pathway activity destabilizes SOX9 in a GSK3/FBW7‐dependent manner, rendering medulloblastoma cells sensitive to cytostatic treatment.
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Affiliation(s)
| | - Vasil Savov
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Rudbeck Laboratory, Uppsala University, Uppsala, Sweden
| | - Andrä Brunner
- Department of Cell and Molecular Biology, Karolinska Institutet, Stockholm, Sweden
| | - Sara Bolin
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Rudbeck Laboratory, Uppsala University, Uppsala, Sweden
| | - Holger Weishaupt
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Rudbeck Laboratory, Uppsala University, Uppsala, Sweden
| | - Alena Malyukova
- Department of Cell and Molecular Biology, Karolinska Institutet, Stockholm, Sweden
| | - Gabriela Rosén
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Rudbeck Laboratory, Uppsala University, Uppsala, Sweden
| | - Matko Čančer
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Rudbeck Laboratory, Uppsala University, Uppsala, Sweden
| | - Sonja Hutter
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Rudbeck Laboratory, Uppsala University, Uppsala, Sweden.,German Cancer Consortium (DKTK) and German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Anders Sundström
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Rudbeck Laboratory, Uppsala University, Uppsala, Sweden
| | - Daisuke Kawauchi
- German Cancer Consortium (DKTK) and German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - David Tw Jones
- German Cancer Consortium (DKTK) and German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Charles Spruck
- Tumor Initiation and Maintenance Program, Cancer Center, Sanford-Burnham-Prebys Medical Discovery Institute, La Jolla, CA, USA
| | - Michael D Taylor
- The Arthur and Sonia Labatt Brain Tumour Research Centre, The Hospital for Sick Children, Toronto, ON, Canada
| | - Yoon-Jae Cho
- Department of Neurology and Neurological Sciences, Stanford University School of Medicine, Stanford, CA, USA
| | - Stefan M Pfister
- German Cancer Consortium (DKTK) and German Cancer Research Center (DKFZ), Heidelberg, Germany.,Department of Pediatric Hematology and Oncology, University Hospital, Heidelberg, Germany
| | - Marcel Kool
- German Cancer Consortium (DKTK) and German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Andrey Korshunov
- German Cancer Consortium (DKTK) and German Cancer Research Center (DKFZ), Heidelberg, Germany.,Department of Neuropathology, University Hospital, Heidelberg, Germany
| | - Fredrik J Swartling
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Rudbeck Laboratory, Uppsala University, Uppsala, Sweden
| | - Olle Sangfelt
- Department of Cell and Molecular Biology, Karolinska Institutet, Stockholm, Sweden
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44
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Ortiz A, Husi H, Gonzalez-Lafuente L, Valiño-Rivas L, Fresno M, Sanz AB, Mullen W, Albalat A, Mezzano S, Vlahou T, Mischak H, Sanchez-Niño MD. Mitogen-Activated Protein Kinase 14 Promotes AKI. J Am Soc Nephrol 2016; 28:823-836. [PMID: 27620989 DOI: 10.1681/asn.2015080898] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2015] [Accepted: 07/28/2016] [Indexed: 01/20/2023] Open
Abstract
An improved understanding of pathogenic pathways in AKI may identify novel therapeutic approaches. Previously, we conducted unbiased liquid chromatography-tandem mass spectrometry-based protein expression profiling of the renal proteome in mice with acute folate nephropathy. Here, analysis of the dataset identified enrichment of pathways involving NFκB in the kidney cortex, and a targeted data mining approach identified components of the noncanonical NFκB pathway, including the upstream kinase mitogen-activated protein kinase kinase kinase 14 (MAP3K14), the NFκB DNA binding heterodimer RelB/NFκB2, and proteins involved in NFκB2 p100 ubiquitination and proteasomal processing to p52, as upregulated. Immunohistochemistry localized MAP3K14 expression to tubular cells in acute folate nephropathy and human AKI. In vivo, kidney expression levels of NFκB2 p100 and p52 increased rapidly after folic acid injection, as did DNA binding of RelB and NFκB2, detected in nuclei isolated from the kidneys. Compared with wild-type mice, MAP3K14 activity-deficient aly/aly (MAP3K14aly/aly) mice had less kidney dysfunction, inflammation, and apoptosis in acute folate nephropathy and less kidney dysfunction and a lower mortality rate in cisplatin-induced AKI. The exchange of bone marrow between wild-type and MAP3K14aly/aly mice did not affect the survival rate of either group after folic acid injection. In cultured tubular cells, MAP3K14 small interfering RNA targeting decreased inflammation and cell death. Additionally, cell culture and in vivo studies identified the chemokines MCP-1, RANTES, and CXCL10 as MAP3K14 targets in tubular cells. In conclusion, MAP3K14 promotes kidney injury through promotion of inflammation and cell death and is a promising novel therapeutic target.
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Affiliation(s)
- Alberto Ortiz
- Instituto Investigacion Sanitaria-Fundacion Jimenez Diaz-Universidad Autonoma de Madrid and Fundacion Renal Iñigo Alvarez de Toledo-Instituto Reina Sofia de Investigacion Nefrologica, Madrid, Spain; .,Red de Investigacion Rena, Madrid, Spain
| | - Holger Husi
- Institute of Cardiovascular and Medical Sciences, University of Glasgow, Glasgow, United Kingdom
| | - Laura Gonzalez-Lafuente
- Instituto Investigacion Sanitaria-Fundacion Jimenez Diaz-Universidad Autonoma de Madrid and Fundacion Renal Iñigo Alvarez de Toledo-Instituto Reina Sofia de Investigacion Nefrologica, Madrid, Spain.,Red de Investigacion Rena, Madrid, Spain
| | - Lara Valiño-Rivas
- Instituto Investigacion Sanitaria-Fundacion Jimenez Diaz-Universidad Autonoma de Madrid and Fundacion Renal Iñigo Alvarez de Toledo-Instituto Reina Sofia de Investigacion Nefrologica, Madrid, Spain.,Red de Investigacion Rena, Madrid, Spain
| | - Manuel Fresno
- Centro de Biología Molecular Severo Ochoa, Consejo Superior de Investigaciones Científicas de la Universidad Autonoma de Madrid, Madrid, Spain
| | - Ana Belen Sanz
- Instituto Investigacion Sanitaria-Fundacion Jimenez Diaz-Universidad Autonoma de Madrid and Fundacion Renal Iñigo Alvarez de Toledo-Instituto Reina Sofia de Investigacion Nefrologica, Madrid, Spain.,Mosaiques diagnostics GmbH, Hannover, Germany
| | - William Mullen
- Institute of Cardiovascular and Medical Sciences, University of Glasgow, Glasgow, United Kingdom
| | - Amaya Albalat
- Institute of Cardiovascular and Medical Sciences, University of Glasgow, Glasgow, United Kingdom
| | - Sergio Mezzano
- Unidad de Nefrología, Instituto de Medicina, Universidad Austral de Chile, Valdivia, Chile; and
| | - Tonia Vlahou
- Biomedical Research Foundation Academy of Athens, Athens, Greece
| | - Harald Mischak
- Institute of Cardiovascular and Medical Sciences, University of Glasgow, Glasgow, United Kingdom.,Mosaiques diagnostics GmbH, Hannover, Germany
| | - Maria Dolores Sanchez-Niño
- Instituto Investigacion Sanitaria-Fundacion Jimenez Diaz-Universidad Autonoma de Madrid and Fundacion Renal Iñigo Alvarez de Toledo-Instituto Reina Sofia de Investigacion Nefrologica, Madrid, Spain; .,Red de Investigacion Rena, Madrid, Spain
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45
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McDaniel DK, Eden K, Ringel VM, Allen IC. Emerging Roles for Noncanonical NF-κB Signaling in the Modulation of Inflammatory Bowel Disease Pathobiology. Inflamm Bowel Dis 2016; 22:2265-79. [PMID: 27508514 PMCID: PMC4992436 DOI: 10.1097/mib.0000000000000858] [Citation(s) in RCA: 107] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Crohn's disease and ulcerative colitis are common and debilitating manifestations of inflammatory bowel disease (IBD). IBD is characterized by a radical imbalance in the activation of proinflammatory and anti-inflammatory signaling pathways in the gut. These pathways are controlled by NF-κB, which is a master regulator of gene transcription. In IBD patients, NF-κB signaling is often dysregulated resulting in overzealous inflammation. NF-κB activation occurs through 2 distinct pathways, defined as either canonical or noncanonical. Canonical NF-κB pathway activation is well studied in IBD and is associated with the rapid, acute production of diverse proinflammatory mediators, such as COX-2, IL-1β, and IL-6. In contrast to the canonical pathway, the noncanonical or "alternative" NF-κB signaling cascade is tightly regulated and is responsible for the production of highly specific chemokines that tend to be associated with less acute, chronic inflammation. There is a relative paucity of literature regarding all aspects of noncanonical NF-ĸB signaling. However, it is clear that this alternative signaling pathway plays a considerable role in maintaining immune system homeostasis and likely contributes significantly to the chronic inflammation underlying IBD. Noncanonical NF-κB signaling may represent a promising new direction in the search for therapeutic targets and biomarkers associated with IBD. However, significant mechanistic insight is still required to translate the current basic science findings into effective therapeutic strategies.
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Affiliation(s)
- Dylan K. McDaniel
- Department of Biomedical Sciences and Pathobiology, Virginia Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA 24061
| | - Kristin Eden
- Department of Biomedical Sciences and Pathobiology, Virginia Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA 24061
| | - Veronica M. Ringel
- Graduate Program in Translational Biology, Medicine, and Health, Virginia Tech, Blacksburg, VA 24061
| | - Irving C. Allen
- Department of Biomedical Sciences and Pathobiology, Virginia Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA 24061
- Graduate Program in Translational Biology, Medicine, and Health, Virginia Tech, Blacksburg, VA 24061
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46
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Wang Y, Xu J, Gao G, Li J, Huang H, Jin H, Zhu J, Che X, Huang C. Tumor-suppressor NFκB2 p100 interacts with ERK2 and stabilizes PTEN mRNA via inhibition of miR-494. Oncogene 2016; 35:4080-90. [PMID: 26686085 PMCID: PMC4916044 DOI: 10.1038/onc.2015.470] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2015] [Revised: 10/19/2015] [Accepted: 11/14/2015] [Indexed: 12/19/2022]
Abstract
Emerging evidence from The Cancer Genome Atlas has revealed that nuclear factor κB2 (nfκb2) gene encoding p100 is genetically deleted or mutated in human cancers, implicating NFκB2 as a potential tumor suppressor. However, the molecular mechanism underlying the antitumorigenic action of p100 remains poorly understood. Here we report that p100 inhibits cancer cell anchorage-independent growth, a hallmark of cellular malignancy, by stabilizing the tumor-suppressor phosphatase and tensin homolog (PTEN) mRNA via a mechanism that is independent of p100's inhibitory role in NFκB activation. We further demonstrate that the regulatory effect of p100 on PTEN expression is mediated by its downregulation of miR-494 as a result of the inactivation of extracellular signal-regulated kinase 2 (ERK2), in turn leading to inhibition of c-Jun/activator protein-1-dependent transcriptional activity. Furthermore, we identify that p100 specifically interacts with non-phosphorylated ERK2 and prevents ERK2 phosphorylation and nuclear translocation. Moreover, the death domain at C-terminal of p100 is identified as being crucial and sufficient for its interaction with ERK2. Taken together, our findings provide novel mechanistic insights into the understanding of the tumor-suppressive role for NFκB2 p100.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Chuanshu Huang
- Corresponding author: Dr. Chuanshu Huang, Nelson Institute of Environmental Medicine, New York University School of Medicine, 57 Old Forge Road, Tuxedo, NY 10987, Tel: 845-731-3519, Fax: 845-351-2320,
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47
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Li W, Yan Q, Ding X, Shen C, Hu M, Zhu Y, Qin D, Lu H, Krueger BJ, Renne R, Gao SJ, Lu C. The SH3BGR/STAT3 Pathway Regulates Cell Migration and Angiogenesis Induced by a Gammaherpesvirus MicroRNA. PLoS Pathog 2016; 12:e1005605. [PMID: 27128969 PMCID: PMC4851422 DOI: 10.1371/journal.ppat.1005605] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2015] [Accepted: 04/08/2016] [Indexed: 12/27/2022] Open
Abstract
Kaposi’s sarcoma (KS)-associated herpesvirus (KSHV) is a gammaherpesvirus etiologically associated with KS, a highly disseminated angiogenic tumor of hyperproliferative spindle endothelial cells. KSHV encodes 25 mature microRNAs but their roles in KSHV-induced tumor dissemination and angiogenesis remain unknown. Here, we investigated KSHV-encoded miR-K12-6-3p (miR-K6-3p) promotion of endothelial cell migration and angiogenesis, which are the underlying mechanisms of tumor dissemination and angiogenesis. We found that ectopic expression of miR-K6-3p promoted endothelial cell migration and angiogenesis. Mass spectrometry, bioinformatics and luciferase reporter analyses revealed that miR-K6-3p directly targeted sequence in the 3’ untranslated region (UTR) of SH3 domain binding glutamate-rich protein (SH3BGR). Overexpression of SH3BGR reversed miR-K6-3p induction of cell migration and angiogenesis. Mechanistically, miR-K6-3p downregulated SH3BGR, hence relieved STAT3 from SH3BGR direct binding and inhibition, which was required for miR-K6-3p maximum activation of STAT3 and induction of cell migration and angiogenesis. Finally, deletion of miR-K6 from the KSHV genome abrogated its effect on the SH3BGR/STAT3 pathway, and KSHV-induced migration and angiogenesis. Our results illustrated that, by inhibiting SH3BGR, miR-K6-3p enhances cell migration and angiogenesis by activating the STAT3 pathway, and thus contributes to the dissemination and angiogenesis of KSHV-induced malignancies. Kaposi’s Sarcoma (KS), caused by infection of Kaposi’s sarcoma (KS)-associated herpesvirus (KSHV), is a tumor of endothelial cells characterized by angiogenesis and invasiveness. In vitro, KSHV-infected endothelial cells display an increased invasiveness and angiogenicity. KSHV encodes twelve precursor miRNAs (pre-miRNAs), which are processed into at least 25 mature miRNAs. However, the roles of these miRNAs in KSHV-induced tumor dissemination and angiogenesis remain unknown. Here, we investigated KSHV-encoded miR-K12-6-3p (miR-K6-3p) promotion of endothelial cell migration and angiogenesis, which are the underlying mechanisms of tumor dissemination and angiogenesis. We demonstrated that miR-K6-3p promoted cell migration and angiogenesis by directly targeting SH3 domain binding glutamate-rich protein (SH3BGR). Furthermore, we found that STAT3, which was negatively regulated by SH3BGR mediated miR-K6-3p-induced cell migration and angiogenesis. MiR-K6-3p downregulation of SH3BGR, hence relieved SH3BGR direct inhibition of STAT3 resulting in the activation of STAT3 and induction of cell migration and angiogenesis. These results identify miR-K6-3p and its the downstream pathway as potential therapeutic targets for the treatment of KSHV-associated malignancies.
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Affiliation(s)
- Wan Li
- State Key Laboratory of Reproductive Medicine, Nanjing Medical University, Nanjing, People's Republic of China.,Key Laboratory of Pathogen Biology of Jiangsu Province, Nanjing Medical University, Nanjing, People's Republic of China.,Department of Microbiology, Nanjing Medical University, Nanjing, People's Republic of China
| | - Qin Yan
- Department of Microbiology, Nanjing Medical University, Nanjing, People's Republic of China
| | - Xiangya Ding
- Department of Microbiology, Nanjing Medical University, Nanjing, People's Republic of China
| | - Chenyou Shen
- Department of Microbiology, Nanjing Medical University, Nanjing, People's Republic of China
| | - Minmin Hu
- Department of Microbiology, Nanjing Medical University, Nanjing, People's Republic of China
| | - Ying Zhu
- Department of Molecular Microbiology and Immunology, Keck School of Medicine, University of Southern California, Los Angeles, California, United States of America
| | - Di Qin
- Department of Microbiology, Nanjing Medical University, Nanjing, People's Republic of China
| | - Hongmei Lu
- Department of Obstetrics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, People's Republic of China
| | - Brian J Krueger
- Department of Molecular Genetics and Microbiology, University of Florida, Gainesville, Florida, United States of America
| | - Rolf Renne
- Department of Molecular Genetics and Microbiology, University of Florida, Gainesville, Florida, United States of America
| | - Shou-Jiang Gao
- Department of Molecular Microbiology and Immunology, Keck School of Medicine, University of Southern California, Los Angeles, California, United States of America
| | - Chun Lu
- State Key Laboratory of Reproductive Medicine, Nanjing Medical University, Nanjing, People's Republic of China.,Key Laboratory of Pathogen Biology of Jiangsu Province, Nanjing Medical University, Nanjing, People's Republic of China.,Department of Microbiology, Nanjing Medical University, Nanjing, People's Republic of China
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48
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Christian F, Smith EL, Carmody RJ. The Regulation of NF-κB Subunits by Phosphorylation. Cells 2016; 5:cells5010012. [PMID: 26999213 PMCID: PMC4810097 DOI: 10.3390/cells5010012] [Citation(s) in RCA: 470] [Impact Index Per Article: 58.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2016] [Revised: 03/09/2016] [Accepted: 03/14/2016] [Indexed: 12/31/2022] Open
Abstract
The NF-κB transcription factor is the master regulator of the inflammatory response and is essential for the homeostasis of the immune system. NF-κB regulates the transcription of genes that control inflammation, immune cell development, cell cycle, proliferation, and cell death. The fundamental role that NF-κB plays in key physiological processes makes it an important factor in determining health and disease. The importance of NF-κB in tissue homeostasis and immunity has frustrated therapeutic approaches aimed at inhibiting NF-κB activation. However, significant research efforts have revealed the crucial contribution of NF-κB phosphorylation to controlling NF-κB directed transactivation. Importantly, NF-κB phosphorylation controls transcription in a gene-specific manner, offering new opportunities to selectively target NF-κB for therapeutic benefit. This review will focus on the phosphorylation of the NF-κB subunits and the impact on NF-κB function.
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Affiliation(s)
- Frank Christian
- Centre for Immunobiology, Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow G12 8TA, UK.
| | - Emma L Smith
- Centre for Immunobiology, Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow G12 8TA, UK.
| | - Ruaidhrí J Carmody
- Centre for Immunobiology, Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow G12 8TA, UK.
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49
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Meyerovich K, Fukaya M, Terra LF, Ortis F, Eizirik DL, Cardozo AK. The non-canonical NF-κB pathway is induced by cytokines in pancreatic beta cells and contributes to cell death and proinflammatory responses in vitro. Diabetologia 2016; 59:512-21. [PMID: 26634571 DOI: 10.1007/s00125-015-3817-z] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/24/2015] [Accepted: 10/29/2015] [Indexed: 02/04/2023]
Abstract
AIMS/HYPOTHESIS Activation of the transcription factor nuclear factor (NF)-κB by proinflammatory cytokines plays an important role in beta cell demise in type 1 diabetes. Two main signalling pathways are known to activate NF-κB, namely the canonical and the non-canonical pathways. Up to now, studies on the role of NF-κB activation in beta cells have focused on the canonical pathway. The aim of this study was to investigate whether cytokines activate the non-canonical pathway in beta cells, how this pathway is regulated and the consequences of its activation on beta cell fate. METHODS NF-κB signalling was analysed by immunoblotting, promoter reporter assays and real-time RT-PCR, after knockdown or overexpression of key genes/proteins. INS-1E cells, FACS-purified rat beta cells and the human beta cell line EndoC-βH1 exposed to cytokines were used as models. RESULTS IL-1β plus IFN-γ induced stabilisation of NF-κB-inducing kinase and increased the expression and cleavage of p100 protein, culminating in the nuclear translocation of p52, the hallmark of the non-canonical signalling. This activation relied on different crosstalks between the canonical and non-canonical pathways, some of which were beta cell specific. Importantly, cytokine-mediated activation of the non-canonical pathway controlled the expression of 'late' NF-κB-dependent genes, regulating both pro-apoptotic and inflammatory responses, which are implicated in beta cell loss in early type 1 diabetes. CONCLUSIONS/INTERPRETATION The atypical activation of the non-canonical NF-κB pathway by proinflammatory cytokines constitutes a novel 'feed-forward' mechanism that contributes to the particularly pro-apoptotic effect of NF-κB in beta cells.
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Affiliation(s)
- Kira Meyerovich
- ULB Center for Diabetes Research, Université Libre de Bruxelles, Route de Lennik, 808, CP 618, 1070, Brussels, Belgium
| | - Makiko Fukaya
- ULB Center for Diabetes Research, Université Libre de Bruxelles, Route de Lennik, 808, CP 618, 1070, Brussels, Belgium
| | - Leticia F Terra
- Institute of Chemistry, Universidade de São Paulo, São Paulo, Brazil
| | - Fernanda Ortis
- Department of Cell and Developmental Biology, Universidade de São Paulo, São Paulo, Brazil
| | - Decio L Eizirik
- ULB Center for Diabetes Research, Université Libre de Bruxelles, Route de Lennik, 808, CP 618, 1070, Brussels, Belgium
| | - Alessandra K Cardozo
- ULB Center for Diabetes Research, Université Libre de Bruxelles, Route de Lennik, 808, CP 618, 1070, Brussels, Belgium.
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50
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Díaz VM, de Herreros AG. F-box proteins: Keeping the epithelial-to-mesenchymal transition (EMT) in check. Semin Cancer Biol 2016; 36:71-9. [DOI: 10.1016/j.semcancer.2015.10.003] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2015] [Revised: 10/01/2015] [Accepted: 10/17/2015] [Indexed: 12/22/2022]
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