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Yuan J, Lv T, Yang J, Wu Z, Yan L, Yang J, Shi Y, Jiang L. HDLBP Promotes Hepatocellular Carcinoma Proliferation and Sorafenib Resistance by Suppressing Trim71-dependent RAF1 Degradation. Cell Mol Gastroenterol Hepatol 2023; 15:307-325. [PMID: 36244648 PMCID: PMC9772558 DOI: 10.1016/j.jcmgh.2022.10.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Revised: 10/07/2022] [Accepted: 10/07/2022] [Indexed: 01/28/2023]
Abstract
BACKGROUND & AIMS The contribution of abnormal metabolic targets to hepatocellular carcinoma (HCC) progression and the associated regulatory mechanisms are attractive research areas. High-density lipoprotein binding protein (HDLBP) is an important transporter that protects cells from excessive cholesterol accumulation, but few studies have identified a role for HDLBP in HCC progression. METHODS HDLBP expression was determined in HCC tissues and published datasets. The biological roles of HDLBP in vitro and in vivo were examined by performing a series of functional experiments. RESULTS An integrated analysis confirmed that HDLBP expression was significantly elevated in HCC compared with noncancerous liver tissues. The knockdown or overexpression of HDLBP substantially inhibited or enhanced, respectively, HCC proliferation and sorafenib resistance. Subsequently, a mass spectrometry screen identified RAF1 as a potential downstream target of HDLBP. Mechanistically, when RAF1 was stabilized by HDLBP, MEKK1 continuously induced RAF1Ser259-dependent MAPK signaling. Meanwhile, HDLBP interacted with RAF1 by competing with the TRIM71 E3 ligase and inhibited RAF1 degradation through the ubiquitin-proteasome pathway. CONCLUSIONS Our study reveals that HDLBP is an important mediator that stabilizes the RAF1 protein and maintains its activity, leading to HCC progression and sorafenib resistance. Thus, HDLBP might represent a potential biomarker and future therapeutic target for HCC.
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Affiliation(s)
- Jingsheng Yuan
- Department of Liver Surgery and Liver Transplantation Center, West China Hospital of Sichuan University, Chengdu, China; Laboratory of Liver Transplantation, Frontiers Science Center for Disease-related Molecular Network, West China Hospital of Sichuan University, Chengdu, China
| | - Tao Lv
- Department of Liver Surgery and Liver Transplantation Center, West China Hospital of Sichuan University, Chengdu, China; Laboratory of Liver Transplantation, Frontiers Science Center for Disease-related Molecular Network, West China Hospital of Sichuan University, Chengdu, China
| | - Jian Yang
- Department of Liver Surgery and Liver Transplantation Center, West China Hospital of Sichuan University, Chengdu, China; Laboratory of Liver Transplantation, Frontiers Science Center for Disease-related Molecular Network, West China Hospital of Sichuan University, Chengdu, China
| | - Zhenru Wu
- Laboratory of Pathology, Key Laboratory of Transplant Engineering and Immunology, NHC, West China Hospital of Sichuan University, Chengdu, China
| | - Lvnan Yan
- Department of Liver Surgery and Liver Transplantation Center, West China Hospital of Sichuan University, Chengdu, China; Laboratory of Liver Transplantation, Frontiers Science Center for Disease-related Molecular Network, West China Hospital of Sichuan University, Chengdu, China
| | - Jiayin Yang
- Department of Liver Surgery and Liver Transplantation Center, West China Hospital of Sichuan University, Chengdu, China; Laboratory of Liver Transplantation, Frontiers Science Center for Disease-related Molecular Network, West China Hospital of Sichuan University, Chengdu, China.
| | - Yujun Shi
- Laboratory of Liver Transplantation, Frontiers Science Center for Disease-related Molecular Network, West China Hospital of Sichuan University, Chengdu, China; Laboratory of Pathology, Key Laboratory of Transplant Engineering and Immunology, NHC, West China Hospital of Sichuan University, Chengdu, China.
| | - Li Jiang
- Department of Liver Surgery and Liver Transplantation Center, West China Hospital of Sichuan University, Chengdu, China; Laboratory of Liver Transplantation, Frontiers Science Center for Disease-related Molecular Network, West China Hospital of Sichuan University, Chengdu, China.
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Gao X, Lian Q, Guan B, Liu QY, Meng M, Chen Y, Jin J, Li H, Liu X, Sun Z, Liu L, He QY, Zhang G. ZSWIM1 Promotes the Proliferation and Metastasis of Lung Adenocarcinoma Cells through the STK38/MEKK2/ERK1/2 Axis. J Proteome Res 2022; 22:1080-1091. [PMID: 36511424 DOI: 10.1021/acs.jproteome.2c00412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Investigating the functions of the proteins with no or less functional annotations is an important goal of the HPP (Human Proteome Project) Grand Project. In this study, we investigated the function of such a protein, ZSWIM1 (C20orf162), its gene located on chromosome 20. Its expression is upregulated in lung adenocarcinoma compared with the adjacent normal tissues and negatively correlated with the overall survival. Overexpressing ZSWIM1 markedly promotes the proliferation, migration, invasion as well as epithelial-to-mesenchymal transition in lung adenocarcinoma cells, while knocking down ZSWIM1 functions oppositely. The interactome of ZSWIM1 was identified by immunoprecipitation-mass spectrometry, and we verified the interaction of ZSWIM1 with the potential partner, STK38. ZSWIM1 antagonized the function of STK38. Mechanically, ZSWIM1 promoted the activation of MEKK2/ERK1/2 pathway through interacting with STK38, leading to the release of MEKK2. Taken together, ZSWIM1 can be annotated as an oncogene in lung adenocarcinoma, and the STK38/MEKK2/ERK1/2 axis mediates its promoting role in lung adenocarcinoma.
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Affiliation(s)
- Xuejuan Gao
- MOE Key Laboratory of Tumor Molecular Biology and Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Qionghua Lian
- MOE Key Laboratory of Tumor Molecular Biology and Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Baiye Guan
- MOE Key Laboratory of Tumor Molecular Biology and Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Qiu-Yu Liu
- Department of Pathology, Henan Provincial People’s Hospital, People’s Hospital of Zhengzhou University, Zhengzhou 450003, China
| | - Meng Meng
- MOE Key Laboratory of Tumor Molecular Biology and Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Yang Chen
- MOE Key Laboratory of Tumor Molecular Biology and Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Jingjie Jin
- MOE Key Laboratory of Tumor Molecular Biology and Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Huihua Li
- MOE Key Laboratory of Tumor Molecular Biology and Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Xiaohui Liu
- MOE Key Laboratory of Tumor Molecular Biology and Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Zhenghua Sun
- MOE Key Laboratory of Tumor Molecular Biology and Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Langxia Liu
- MOE Key Laboratory of Tumor Molecular Biology and Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Qing-Yu He
- MOE Key Laboratory of Tumor Molecular Biology and Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Gong Zhang
- MOE Key Laboratory of Tumor Molecular Biology and Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
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3
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Frenay J, Bellaye PS, Oudot A, Helbling A, Petitot C, Ferrand C, Collin B, Dias AMM. IL-1RAP, a Key Therapeutic Target in Cancer. Int J Mol Sci 2022; 23:ijms232314918. [PMID: 36499246 PMCID: PMC9735758 DOI: 10.3390/ijms232314918] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Revised: 11/17/2022] [Accepted: 11/21/2022] [Indexed: 11/30/2022] Open
Abstract
Cancer is a major cause of death worldwide and especially in high- and upper-middle-income countries. Despite recent progress in cancer therapies, such as chimeric antigen receptor T (CAR-T) cells or antibody-drug conjugate (ADC), new targets expressed by the tumor cells need to be identified in order to selectively drive these innovative therapies to tumors. In this context, IL-1RAP recently showed great potential to become one of these new targets for cancer therapy. IL-1RAP is highly involved in the inflammation process through the interleukins 1, 33, and 36 (IL-1, IL-33, IL-36) signaling pathways. Inflammation is now recognized as a hallmark of carcinogenesis, suggesting that IL-1RAP could play a role in cancer development and progression. Furthermore, IL-1RAP was found overexpressed on tumor cells from several hematological and solid cancers, thus confirming its potential involvement in carcinogenesis. This review will first describe the structure and genetics of IL-1RAP as well as its role in tumor development. Finally, a focus will be made on the therapies based on IL-1RAP targeting, which are now under preclinical or clinical development.
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Affiliation(s)
- Jame Frenay
- Plateforme d'Imagerie et Radiothérapie Précliniques, Médecine Nucléaire, Centre Georges-François Leclerc, 21000 Dijon, France
| | - Pierre-Simon Bellaye
- Plateforme d'Imagerie et Radiothérapie Précliniques, Médecine Nucléaire, Centre Georges-François Leclerc, 21000 Dijon, France
| | - Alexandra Oudot
- Plateforme d'Imagerie et Radiothérapie Précliniques, Médecine Nucléaire, Centre Georges-François Leclerc, 21000 Dijon, France
| | - Alex Helbling
- Plateforme d'Imagerie et Radiothérapie Précliniques, Médecine Nucléaire, Centre Georges-François Leclerc, 21000 Dijon, France
| | - Camille Petitot
- Plateforme d'Imagerie et Radiothérapie Précliniques, Médecine Nucléaire, Centre Georges-François Leclerc, 21000 Dijon, France
| | - Christophe Ferrand
- INSERM UMR1098, EFS BFC, Université de Bourgogne Franche-Comté, 25000 Besançon, France
- CanCell Therapeutics, 25000 Besançon, France
| | - Bertrand Collin
- Plateforme d'Imagerie et Radiothérapie Précliniques, Médecine Nucléaire, Centre Georges-François Leclerc, 21000 Dijon, France
- Institut de Chimie Moléculaire de l'Université de Bourgogne, UMR CNRS 6302, 21000 Dijon, France
| | - Alexandre M M Dias
- Plateforme d'Imagerie et Radiothérapie Précliniques, Médecine Nucléaire, Centre Georges-François Leclerc, 21000 Dijon, France
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4
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Fu S, Wang K, Ma T, Liang Y, Ma Z, Wu J, Xu Y, Zhou X. An evolutionarily conserved C4HC3-type E3 ligase regulates plant broad-spectrum resistance against pathogens. THE PLANT CELL 2022; 34:1822-1843. [PMID: 35171277 PMCID: PMC9048923 DOI: 10.1093/plcell/koac055] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Accepted: 01/11/2022] [Indexed: 05/27/2023]
Abstract
Deployment of broad-spectrum disease resistance against multiple pathogen species is an efficient way to control plant diseases. Here, we identify a Microtubule-associated C4HC3-type E3 Ligase (MEL) in both Nicotiana benthamiana and Oryza sativa, and show that it is able to integrate and initiate a series of host immune signaling, conferring broad-spectrum resistance to viral, fungal, and bacterial pathogens. We demonstrate that MEL forms homodimer through intermolecular disulfide bonds between its cysteine residues in the SWIM domain, and interacts with its substrate serine hydroxymethyltrasferase 1 (SHMT1) through the YφNL motif. Ubiquitin ligase activity, homodimerization and YφNL motif are indispensable for MEL to regulate plant immunity by mediating SHMT1 degradation through the 26S proteasome pathway. Our findings provide a fundamental basis for utilizing the MEL-SHMT1 module to generate broad-spectrum-resistant rice to global destructive pathogens including rice stripe virus, Magnaporthe oryzae, and Xanthomonas oryzae pv. oryzae.
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Affiliation(s)
| | | | - Tingting Ma
- State Key Laboratory of Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Yan Liang
- State Key Laboratory of Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China
| | - Zhonghua Ma
- State Key Laboratory of Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China
| | - Jianxiang Wu
- State Key Laboratory of Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China
| | - Yi Xu
- State Key Laboratory of Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China
- Department of Plant Pathology, Nanjing Agricultural University, Nanjing 210095, China
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5
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Di Segni M, Virdia I, Verdina A, Amoreo CA, Baldari S, Toietta G, Diodoro MG, Mottolese M, Sperduti I, Moretti F, Buglioni S, Soddu S, Di Rocco G. HIPK2 cooperates with KRAS signaling and associates with colorectal cancer progression. Mol Cancer Res 2022; 20:686-698. [PMID: 35082165 DOI: 10.1158/1541-7786.mcr-21-0628] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Revised: 11/25/2021] [Accepted: 01/21/2022] [Indexed: 11/16/2022]
Abstract
HIPK2 is an evolutionary conserved kinase that has gained attention as a fine tuner of multiple signaling pathways, among which those commonly altered in colorectal cancer (CRC). The aim of this study was to evaluate the relationship of HIPK2 expression with progression markers and mutational pattern and gain insights into the contribution of HIPK2 activity in CRC. We evaluated a retrospective cohort of CRC samples by immunohistochemistry for HIPK2 expression and by NGS for the detection of mutations of cancer associated genes. We show that the percentage of HIPK2 positive cells increases with tumor progression, significantly correlates with TNM staging and associates with a worse outcome. In addition, we observed that high HIPK2 expression significantly associates with KRAS mutations but not with other cancer related genes. Functional characterization of the link between HIPK2 and KRAS show that activation of the RAS pathway either due to KRAS mutation or via upstream receptor stimulation, increases HIPK2 expression at the protein level. Of note, HIPK2 physically participates in the active RAS complex while HIPK2 depletion impairs ERK phosphorylation and the growth of tumors derived from KRAS mutated CRC cells. Overall, this study identifies HIPK2 as a prognostic biomarker candidate in CRC patients and underscores a previously unknown functional link between HIPK2 and the KRAS signaling pathway. Implications: Our data indicate HIPK2 as a new player in the complex picture of the KRAS signaling network, providing rationales for future clinical studies and new treatment strategies for KRAS mutated CRC.
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Affiliation(s)
- Micol Di Segni
- Department of Research, Advanced Diagnostic and Technological Innovation, IRCCS - Regina Elena National Cancer Institute
| | - Ilaria Virdia
- Department of Research, Advanced Diagnostic and Technological Innovation, Regina Elena National Cancer Institute, IRCCS - Regina Elena National Cancer Institute
| | - Alessandra Verdina
- Department of Research, Advanced Diagnostic and Technological Innovation, IRCCS - Regina Elena National Cancer Institute
| | - Carla Azzurra Amoreo
- Research, Advanced Diagnostic, and Technological Innovation, Istituto Nazionale Tumori Regina Elena
| | - Silvia Baldari
- Department of Research, Advanced Diagnostic and Technological Innovation, Regina Elena National Cancer Institute
| | - Gabriele Toietta
- Department of Research, Advanced Diagnostic and Technological Innovation, Regina Elena National Cancer Institute
| | | | | | | | - Fabiola Moretti
- Institute of Biochemistry and Cell Biology, National Research Council of Italy
| | | | - Silvia Soddu
- Department of Research, Advanced Diagnostic and Technological Innovation, IRCCS Regina Elena National Cancer Institute
| | - Giuliana Di Rocco
- Department of Research and Advanced Technologies, IRCCS - Regina Elena National Cancer Institute
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6
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Stoll K, Bergmann M, Spiliotis M, Brehm K. A MEKK1 - JNK mitogen activated kinase (MAPK) cascade module is active in Echinococcus multilocularis stem cells. PLoS Negl Trop Dis 2021; 15:e0010027. [PMID: 34879059 PMCID: PMC8687709 DOI: 10.1371/journal.pntd.0010027] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Revised: 12/20/2021] [Accepted: 11/25/2021] [Indexed: 11/18/2022] Open
Abstract
Background The metacestode larval stage of the fox-tapeworm Echinococcus multilocularis causes alveolar echinococcosis by tumour-like growth within the liver of the intermediate host. Metacestode growth and development is stimulated by host-derived cytokines such as insulin, fibroblast growth factor, and epidermal growth factor via activation of cognate receptor tyrosine kinases expressed by the parasite. Little is known, however, concerning signal transmission to the parasite nucleus and cross-reaction with other parasite signalling systems. Methodology/Principal findings Using bioinformatic approaches, cloning, and yeast two-hybrid analyses we identified a novel mitogen-activated kinase (MAPK) cascade module that consists of E. multilocularis orthologs of the tyrosine kinase receptor interactor Growth factor receptor-bound 2, EmGrb2, the MAPK kinase kinase EmMEKK1, a novel MAPK kinase, EmMKK3, and a close homolog to c-Jun N-terminal kinase (JNK), EmMPK3. Whole mount in situ hybridization analyses indicated that EmMEKK1 and EmMPK3 are both expressed in E. multilocularis germinative (stem) cells but also in differentiated or differentiating cells. Treatment with the known JNK inhibitor SP600125 led to a significantly reduced formation of metacestode vesicles from stem cells and to a specific reduction of proliferating stem cells in mature metacestode vesicles. Conclusions/Significance We provide evidence for the expression of a MEKK1-JNK MAPK cascade module which, in mammals, is crucially involved in stress responses, cytoskeletal rearrangements, and apoptosis, in E. multilocularis stem cells. Inhibitor studies indicate an important role of JNK signalling in E. multilocularis stem cell survival and/or maintenance. Our data are relevant for molecular and cellular studies into crosstalk signalling mechanisms that govern Echinococcus stem cell function and introduce the JNK signalling cascade as a possible target of chemotherapeutics against echinococcosis. The metacestode larva of the tapeworm E. multilocularis grows infiltrative, like a malignant tumour, within the liver of the host thus causing the lethal disease alveolar echinococcosis. Previous work established that the metacestode senses signals of host hormones and cytokines by expressing surface receptors that share high homology with respective host receptors. However, little is known how these signals are transmitted from the parasite cell surface to the nucleus to alter gene expression. In this work, the authors present a module of several protein kinases that typically transmit cytokine signals from surface receptors to central regulators called mitogen-activated protein kinases (MAPK). The authors demonstrate that this module is active in parasite stem cells, which drive the development of metacestode larva. They also show that inhibitors directed against one component of the module, EmMPK3, affect maintenance and/or survival of stem cells in the metacestode and prevent the formation of metacestode larva from parasite cell cultures. This information facilitates molecular and cellular studies to unravel the complex signalling network that regulate Echinococcus stem cell proliferation in response to host signals. Furthermore, these data could open new ways of anti-parasitic chemotherapy by introducing EmMPK3 as a possible drug target.
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Affiliation(s)
- Kristin Stoll
- University of Würzburg, Institute of Hygiene and Microbiology, Würzburg, Germany
| | - Monika Bergmann
- University of Würzburg, Institute of Hygiene and Microbiology, Würzburg, Germany
| | - Markus Spiliotis
- University of Würzburg, Institute of Hygiene and Microbiology, Würzburg, Germany
| | - Klaus Brehm
- University of Würzburg, Institute of Hygiene and Microbiology, Würzburg, Germany
- * E-mail:
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7
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Abstract
The protein kinase MEKK1 activates stress-signaling pathways in response to various cellular stressors, including chemotherapies that disrupt dynamics of the tubulin cytoskeleton. We show that MEKK1 contains a previously uncharacterized domain that can preferentially bind to the curved tubulin heterodimer—which is found in soluble tubulin and at sites of microtubule assembly and disassembly. Mutations that interfere with MEKK1−tubulin binding disrupt microtubule networks in migrating cells and are enriched in patient-derived tumor sequences. These results suggest that MEKK1−tubulin binding may be relevant to cancer progression, and the efficacy of microtubule-disrupting chemotherapies that require the activity of MEKK1. The MEKK1 protein is a pivotal kinase activator of responses to cellular stress. Activation of MEKK1 can trigger various responses, including mitogen-activated protein (MAP) kinases, NF-κB signaling, or cell migration. Notably, MEKK1 activity is triggered by microtubule-targeting chemotherapies, among other stressors. Here we show that MEKK1 contains a previously unidentified tumor overexpressed gene (TOG) domain. The MEKK1 TOG domain binds to tubulin heterodimers—a canonical function of TOG domains—but is unusual in that it appears alone rather than as part of a multi-TOG array, and has structural features distinct from previously characterized TOG domains. MEKK1 TOG demonstrates a clear preference for binding curved tubulin heterodimers, which exist in soluble tubulin and at sites of microtubule polymerization and depolymerization. Mutations disrupting tubulin binding decrease microtubule density at the leading edge of polarized cells, suggesting that tubulin binding may play a role in MEKK1 activity at the cellular periphery. We also show that MEKK1 mutations at the tubulin-binding interface of the TOG domain recur in patient-derived tumor sequences, suggesting selective enrichment of tumor cells with disrupted MEKK1–microtubule association. Together, these findings provide a direct link between the MEKK1 protein and tubulin, which is likely to be relevant to cancer cell migration and response to microtubule-modulating therapies.
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8
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Brubaker DK, Kumar MP, Chiswick EL, Gregg C, Starchenko A, Vega PN, Southard-Smith AN, Simmons AJ, Scoville EA, Coburn LA, Wilson KT, Lau KS, Lauffenburger DA. An interspecies translation model implicates integrin signaling in infliximab-resistant inflammatory bowel disease. Sci Signal 2020; 13:13/643/eaay3258. [PMID: 32753478 DOI: 10.1126/scisignal.aay3258] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Anti-tumor necrosis factor (anti-TNF) therapy resistance is a major clinical challenge in inflammatory bowel disease (IBD), due, in part, to insufficient understanding of disease-site, protein-level mechanisms. Although proteomics data from IBD mouse models exist, data and phenotype discrepancies contribute to confounding translation from preclinical animal models of disease to clinical cohorts. We developed an approach called translatable components regression (TransComp-R) to overcome interspecies and trans-omic discrepancies between mouse models and human subjects. TransComp-R combines mouse proteomic data with patient pretreatment transcriptomic data to identify molecular features discernable in the mouse data that are predictive of patient response to therapy. Interrogating the TransComp-R models revealed activated integrin pathway signaling in patients with anti-TNF-resistant colonic Crohn's disease (cCD) and ulcerative colitis (UC). As a step toward validation, we performed single-cell RNA sequencing (scRNA-seq) on biopsies from a patient with cCD and analyzed publicly available immune cell proteomics data to characterize the immune and intestinal cell types contributing to anti-TNF resistance. We found that ITGA1 was expressed in T cells and that interactions between these cells and intestinal cell types were associated with resistance to anti-TNF therapy. We experimentally showed that the α1 integrin subunit mediated the effectiveness of anti-TNF therapy in human immune cells. Thus, TransComp-R identified an integrin signaling mechanism with potential therapeutic implications for overcoming anti-TNF therapy resistance. We suggest that TransComp-R is a generalizable framework for addressing species, molecular, and phenotypic discrepancies between model systems and patients to translationally deliver relevant biological insights.
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Affiliation(s)
- Douglas K Brubaker
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.,Department of Biomedical Engineering, Purdue University, West Lafayette, IN 47906, USA.,Regenstrief Center for Healthcare Engineering, Purdue University, West Lafayette, IN 47906, USA
| | - Manu P Kumar
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Evan L Chiswick
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Cecil Gregg
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Alina Starchenko
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Paige N Vega
- Epithelial Biology Center, Vanderbilt University School of Medicine, Nashville, TN 37232, USA.,Department of Cell and Developmental Biology, Vanderbilt University, Nashville, TN 37232, USA
| | - Austin N Southard-Smith
- Epithelial Biology Center, Vanderbilt University School of Medicine, Nashville, TN 37232, USA.,Department of Cell and Developmental Biology, Vanderbilt University, Nashville, TN 37232, USA
| | - Alan J Simmons
- Epithelial Biology Center, Vanderbilt University School of Medicine, Nashville, TN 37232, USA.,Department of Cell and Developmental Biology, Vanderbilt University, Nashville, TN 37232, USA
| | - Elizabeth A Scoville
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN 37232, USA.,Center for Mucosal Inflammation and Cancer, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Lori A Coburn
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN 37232, USA.,Center for Mucosal Inflammation and Cancer, Vanderbilt University Medical Center, Nashville, TN 37232, USA.,Veterans Affairs Tennessee Valley Healthcare System, Nashville, TN 37212, USA
| | - Keith T Wilson
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN 37232, USA.,Center for Mucosal Inflammation and Cancer, Vanderbilt University Medical Center, Nashville, TN 37232, USA.,Veterans Affairs Tennessee Valley Healthcare System, Nashville, TN 37212, USA.,Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Ken S Lau
- Epithelial Biology Center, Vanderbilt University School of Medicine, Nashville, TN 37232, USA.,Department of Cell and Developmental Biology, Vanderbilt University, Nashville, TN 37232, USA.,Center for Mucosal Inflammation and Cancer, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Douglas A Lauffenburger
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
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9
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Yang J, Moraga A, Xu J, Zhao Y, Luo P, Lao KH, Margariti A, Zhao Q, Ding W, Wang G, Zhang M, Zheng L, Zhang Z, Hu Y, Wang W, Shen L, Smith A, Shah AM, Wang Q, Zeng L. A histone deacetylase 7-derived peptide promotes vascular regeneration via facilitating 14-3-3γ phosphorylation. Stem Cells 2020; 38:556-573. [PMID: 31721359 PMCID: PMC7187271 DOI: 10.1002/stem.3122] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2019] [Accepted: 10/25/2019] [Indexed: 12/12/2022]
Abstract
Histone deacetylase 7 (HDAC7) plays a pivotal role in the maintenance of the endothelium integrity. In this study, we demonstrated that the intron-containing Hdac7 mRNA existed in the cytosol and that ribosomes bound to a short open reading frame (sORF) within the 5'-terminal noncoding area of this Hdac7 mRNA in response to vascular endothelial growth factor (VEGF) stimulation in the isolated stem cell antigen-1 positive (Sca1+ ) vascular progenitor cells (VPCs). A 7-amino acid (7A) peptide has been demonstrated to be translated from the sORF in Sca1+ -VPCs in vitro and in vivo. The 7A peptide was shown to receive phosphate group from the activated mitogen-activated protein kinase MEKK1 and transfer it to 14-3-3 gamma protein, forming an MEKK1-7A-14-3-3γ signal pathway downstream VEGF. The exogenous synthetic 7A peptide could increase Sca1+ -VPCs cell migration, re-endothelialization in the femoral artery injury, and angiogenesis in hind limb ischemia. A Hd7-7sFLAG transgenic mice line was generated as the loss-of-function model, in which the 7A peptide was replaced by a FLAG-tagged scrabbled peptide. Loss of the endogenous 7A impaired Sca1+ -VPCs cell migration, re-endothelialization of the injured femoral artery, and angiogenesis in ischemic tissues, which could be partially rescued by the addition of the exogenous 7A/7Ap peptide. This study provides evidence that sORFs can be alternatively translated and the derived peptides may play an important role in physiological processes including vascular remodeling.
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Affiliation(s)
- Junyao Yang
- School of Cardiovascular Medicine and Sciences, King's College - London British Heart Foundation Centre of Excellence, Faculty of Life Science and Medicine, King's College London, London, UK.,Department of Clinical Laboratory, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China
| | - Ana Moraga
- School of Cardiovascular Medicine and Sciences, King's College - London British Heart Foundation Centre of Excellence, Faculty of Life Science and Medicine, King's College London, London, UK
| | - Jing Xu
- Institute of Bioengineering, Queen Mary University of London, London, UK
| | - Yue Zhao
- School of Cardiovascular Medicine and Sciences, King's College - London British Heart Foundation Centre of Excellence, Faculty of Life Science and Medicine, King's College London, London, UK
| | - Peiyi Luo
- School of Cardiovascular Medicine and Sciences, King's College - London British Heart Foundation Centre of Excellence, Faculty of Life Science and Medicine, King's College London, London, UK
| | - Ka Hou Lao
- School of Cardiovascular Medicine and Sciences, King's College - London British Heart Foundation Centre of Excellence, Faculty of Life Science and Medicine, King's College London, London, UK
| | - Andriana Margariti
- Centre for Experimental Medicine, Queen's University Belfast, Belfast, UK
| | - Qiang Zhao
- State Key Laboratory of Medicinal Chemical Biology, Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences, Nankai University, Tianjin, People's Republic of China
| | - Wei Ding
- Institute of Bioengineering, Queen Mary University of London, London, UK
| | - Gang Wang
- Department of Emergency Medicine, The Second Affiliated Hospital, Xi'an Jiaotong University, Xi'an, People's Republic of China
| | - Min Zhang
- School of Cardiovascular Medicine and Sciences, King's College - London British Heart Foundation Centre of Excellence, Faculty of Life Science and Medicine, King's College London, London, UK
| | - Lei Zheng
- Southern Medical University, Guangzhou, People's Republic of China
| | - Zhongyi Zhang
- School of Cardiovascular Medicine and Sciences, King's College - London British Heart Foundation Centre of Excellence, Faculty of Life Science and Medicine, King's College London, London, UK
| | - Yanhua Hu
- School of Cardiovascular Medicine and Sciences, King's College - London British Heart Foundation Centre of Excellence, Faculty of Life Science and Medicine, King's College London, London, UK
| | - Wen Wang
- Institute of Bioengineering, Queen Mary University of London, London, UK
| | - Lisong Shen
- Department of Clinical Laboratory, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China
| | - Alberto Smith
- School of Cardiovascular Medicine and Sciences, King's College - London British Heart Foundation Centre of Excellence, Faculty of Life Science and Medicine, King's College London, London, UK
| | - Ajay M Shah
- School of Cardiovascular Medicine and Sciences, King's College - London British Heart Foundation Centre of Excellence, Faculty of Life Science and Medicine, King's College London, London, UK
| | - Qian Wang
- Southern Medical University, Guangzhou, People's Republic of China
| | - Lingfang Zeng
- School of Cardiovascular Medicine and Sciences, King's College - London British Heart Foundation Centre of Excellence, Faculty of Life Science and Medicine, King's College London, London, UK
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10
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Park JG, Aziz N, Cho JY. MKK7, the essential regulator of JNK signaling involved in cancer cell survival: a newly emerging anticancer therapeutic target. Ther Adv Med Oncol 2019; 11:1758835919875574. [PMID: 31579105 PMCID: PMC6759727 DOI: 10.1177/1758835919875574] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2019] [Accepted: 08/19/2019] [Indexed: 01/02/2023] Open
Abstract
One of the mitogen-activated protein kinases (MAPKs), c-Jun NH2-terminal protein kinase (JNK) plays an important role in regulating cell fate, such as proliferation, differentiation, development, transformation, and apoptosis. Its activity is induced through the interaction of MAPK kinase kinases (MAP3Ks), MAPK kinases (MAP2Ks), and various scaffolding proteins. Because of the importance of the JNK cascade to intracellular bioactivity, many studies have been conducted to reveal its precise intracellular functions and mechanisms, but its regulatory mechanisms remain elusive. In this review, we discuss the molecular characterization, activation process, and physiological functions of mitogen-activated protein kinase kinase 7 (MKK7), the MAP2K that most specifically controls the activity of JNK. Understanding the role of MKK7/JNK signaling in physiological conditions could spark new hypotheses for targeted anticancer therapies.
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Affiliation(s)
- Jae Gwang Park
- Department of Integrative Biotechnology, Sungkyunkwan University, Suwon, Republic of Korea
| | - Nur Aziz
- Department of Integrative Biotechnology, Sungkyunkwan University, Suwon, Republic of Korea
| | - Jae Youl Cho
- Department of Integrative Biotechnology, Sungkyunkwan University, 2066 Seobu-ro, Suwon 16419, Republic of Korea
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11
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Sciarretta F, Fulci C, Palumbo C, Aquilano K, Pastore A, Iorio E, Lettieri-Barbato D, Cicconi R, Minutolo A, Parravano M, Gilardi M, Varano M, Caccuri AM. Glutathione transferase P silencing promotes neuronal differentiation of retinal R28 cells. J Cell Physiol 2019; 234:15885-15897. [PMID: 30741416 DOI: 10.1002/jcp.28246] [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: 07/01/2018] [Revised: 01/14/2019] [Accepted: 01/15/2019] [Indexed: 01/24/2023]
Abstract
Glutathione transferases (GSTs) play an important role in retinal pathophysiology. Within this family, the GSTP isoform is known as an endogenous regulator of cell survival and proliferation pathways and of cellular responses to oxidative stress. In the present study we silenced GSTP in R28 cells, a retinal precursor cell line with markers of both glial and neuronal origin, and obtained stable clones which were viable and, unexpectedly, characterized by a more neuronal phenotype. The degree of neuronal differentiation was inversely correlated with GSTP residual expression levels. The clone with the lowest expression of GSTP showed metabolic reprogramming, a more favorable redox status and, despite its neuronal phenotype, a sensitivity to glutamate and 4-hydroxynonenal toxicity comparable to that of control cells. Altogether, our evidence shows that near full depletion of GSTP in retinal precursor cells, triggers neuronal differentiation and prosurvival metabolic changes.
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Affiliation(s)
- Francesca Sciarretta
- Department of Experimental Medicine, University of Rome Tor Vergata, Rome, Italy
| | - Chiara Fulci
- Department of Experimental Medicine, University of Rome Tor Vergata, Rome, Italy
| | - Camilla Palumbo
- Department of Clinical Sciences and Translational Medicine, University of Rome Tor Vergata, Rome, Italy
| | - Katia Aquilano
- Department of Biology, University of Rome Tor Vergata, Rome, Italy
| | - Anna Pastore
- Laboratory of Molecular Genetics and Functional Genomics, Division of Genetic and Rare Disease, Children's Hospital and Research Institute Bambino Gesù, Rome, Italy
| | - Egidio Iorio
- Core Facilities, High Resolution NMR Unit, Istituto Superiore di Sanità, Rome, Italy
| | | | - Rosella Cicconi
- Interdepartmental Service Centre - Station for Animal Technology (STA), University of Rome Tor Vergata, Rome, Italy
| | | | | | - Marta Gilardi
- Ophthalmology, IRCCS-G.B. Bietti Foundation, Rome, Italy
| | - Monica Varano
- Ophthalmology, IRCCS-G.B. Bietti Foundation, Rome, Italy
| | - Anna Maria Caccuri
- Department of Experimental Medicine, University of Rome Tor Vergata, Rome, Italy.,Interdepartmental Centre for Nanosciences, Nanotechnologies, Innovative Instrumentation (NAST), University of Rome Tor Vergata, Rome, Italy
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12
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Hu B, Li H, Guo W, Sun Y, Zhang X, Tang W, Yang L, Xu Y, Tang X, Ding G, Qiu S, Zhou J, Li Y, Fan J, Yang X. Establishment of a hepatocellular carcinoma patient‐derived xenograft platform and its application in biomarker identification. Int J Cancer 2019; 146:1606-1617. [PMID: 31310010 DOI: 10.1002/ijc.32564] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2018] [Revised: 05/13/2019] [Accepted: 06/11/2019] [Indexed: 12/18/2022]
Affiliation(s)
- Bo Hu
- Department of Liver Surgery, Liver Cancer Institute, Zhongshan HospitalFudan University Shanghai People's Republic of China
- Key Laboratory of Carcinogenesis and Cancer InvasionMinistry of Education Shanghai People's Republic of China
| | - Hong Li
- Key Laboratory of Computational Biology, CAS‐MPG Partner Institute for Computational Biology, Shanghai Institutes for Biological SciencesChinese Academy of Sciences Shanghai People's Republic of China
| | - Wei Guo
- Department of Liver Surgery, Liver Cancer Institute, Zhongshan HospitalFudan University Shanghai People's Republic of China
- Key Laboratory of Carcinogenesis and Cancer InvasionMinistry of Education Shanghai People's Republic of China
- Department of Laboratory Medicine, Zhongshan HospitalFudan University Shanghai People's Republic of China
| | - Yun‐Fan Sun
- Department of Liver Surgery, Liver Cancer Institute, Zhongshan HospitalFudan University Shanghai People's Republic of China
- Key Laboratory of Carcinogenesis and Cancer InvasionMinistry of Education Shanghai People's Republic of China
| | - Xin Zhang
- Department of Liver Surgery, Liver Cancer Institute, Zhongshan HospitalFudan University Shanghai People's Republic of China
- Key Laboratory of Carcinogenesis and Cancer InvasionMinistry of Education Shanghai People's Republic of China
| | - Wei‐Guo Tang
- Department of Liver Surgery, Liver Cancer Institute, Zhongshan HospitalFudan University Shanghai People's Republic of China
- Key Laboratory of Carcinogenesis and Cancer InvasionMinistry of Education Shanghai People's Republic of China
| | - Liu‐Xiao Yang
- Department of Liver Surgery, Liver Cancer Institute, Zhongshan HospitalFudan University Shanghai People's Republic of China
- Key Laboratory of Carcinogenesis and Cancer InvasionMinistry of Education Shanghai People's Republic of China
| | - Yang Xu
- Department of Liver Surgery, Liver Cancer Institute, Zhongshan HospitalFudan University Shanghai People's Republic of China
- Key Laboratory of Carcinogenesis and Cancer InvasionMinistry of Education Shanghai People's Republic of China
| | - Xiao‐Yan Tang
- Key Laboratory of Computational Biology, CAS‐MPG Partner Institute for Computational Biology, Shanghai Institutes for Biological SciencesChinese Academy of Sciences Shanghai People's Republic of China
| | - Guo‐Hui Ding
- Key Laboratory of Computational Biology, CAS‐MPG Partner Institute for Computational Biology, Shanghai Institutes for Biological SciencesChinese Academy of Sciences Shanghai People's Republic of China
| | - Shuang‐Jian Qiu
- Department of Liver Surgery, Liver Cancer Institute, Zhongshan HospitalFudan University Shanghai People's Republic of China
- Key Laboratory of Carcinogenesis and Cancer InvasionMinistry of Education Shanghai People's Republic of China
| | - Jian Zhou
- Department of Liver Surgery, Liver Cancer Institute, Zhongshan HospitalFudan University Shanghai People's Republic of China
- Key Laboratory of Carcinogenesis and Cancer InvasionMinistry of Education Shanghai People's Republic of China
- Institute of Biomedical SciencesFudan University Shanghai People's Republic of China
| | - Yi‐Xue Li
- Key Laboratory of Computational Biology, CAS‐MPG Partner Institute for Computational Biology, Shanghai Institutes for Biological SciencesChinese Academy of Sciences Shanghai People's Republic of China
| | - Jia Fan
- Department of Liver Surgery, Liver Cancer Institute, Zhongshan HospitalFudan University Shanghai People's Republic of China
- Key Laboratory of Carcinogenesis and Cancer InvasionMinistry of Education Shanghai People's Republic of China
- Institute of Biomedical SciencesFudan University Shanghai People's Republic of China
| | - Xin‐Rong Yang
- Department of Liver Surgery, Liver Cancer Institute, Zhongshan HospitalFudan University Shanghai People's Republic of China
- Key Laboratory of Carcinogenesis and Cancer InvasionMinistry of Education Shanghai People's Republic of China
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13
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Structural snapshots of RAF kinase interactions. Biochem Soc Trans 2018; 46:1393-1406. [PMID: 30381334 DOI: 10.1042/bst20170528] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2018] [Revised: 07/25/2018] [Accepted: 07/30/2018] [Indexed: 02/07/2023]
Abstract
RAF (rapidly accelerated fibrosarcoma) Ser/Thr kinases (ARAF, BRAF, and CRAF) link the RAS (rat sarcoma) protein family with the MAPK (mitogen-activated protein kinase) pathway and control cell growth, differentiation, development, aging, and tumorigenesis. Their activity is specifically modulated by protein-protein interactions, post-translational modifications, and conformational changes in specific spatiotemporal patterns via various upstream regulators, including the kinases, phosphatase, GTPases, and scaffold and modulator proteins. Dephosphorylation of Ser-259 (CRAF numbering) and dissociation of 14-3-3 release the RAF regulatory domains RAS-binding domain and cysteine-rich domain for interaction with RAS-GTP and membrane lipids. This, in turn, results in RAF phosphorylation at Ser-621 and 14-3-3 reassociation, followed by its dimerization and ultimately substrate binding and phosphorylation. This review focuses on structural understanding of how distinct binding partners trigger a cascade of molecular events that induces RAF kinase activation.
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14
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Sun J, Nan G. The extracellular signal-regulated kinase 1/2 pathway in neurological diseases: A potential therapeutic target (Review). Int J Mol Med 2017; 39:1338-1346. [PMID: 28440493 PMCID: PMC5428947 DOI: 10.3892/ijmm.2017.2962] [Citation(s) in RCA: 137] [Impact Index Per Article: 19.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2016] [Accepted: 04/12/2017] [Indexed: 02/06/2023] Open
Abstract
Signaling pathways are critical modulators of a variety of physiological and pathological processes, and the abnormal activation of some signaling pathways can contribute to disease progression in various conditions. As a result, signaling pathways have emerged as an important tool through which the occurrence and development of diseases can be studied, which may then lead to the development of novel drugs. Accumulating evidence supports a key role for extracellular signal-regulated kinase 1/2 (ERK1/2) signaling in the embryonic development of the central nervous system (CNS) and in the regulation of adult brain function. ERK1/2, one of the most well characterized members of the mitogen-activated protein kinase family, regulates a range of processes, from metabolism, motility and inflammation, to cell death and survival. In the nervous system, ERK1/2 regulates synaptic plasticity, brain development and repair as well as memory formation. ERK1/2 is also a potent effector of neuronal death and neuroinflammation in many CNS diseases. This review summarizes recent findings in neurobiological ERK1/2 research, with a special emphasis on findings that clarify our understanding of the processes that regulate the plethora of isoform-specific ERK functions under physiological and pathological conditions. Finally, we suggest some potential therapeutic strategies associated with agents acting on the ERK1/2 signaling to prevent or treat neurological diseases.
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Affiliation(s)
- Jing Sun
- Department of Neurology, China-Japan Union Hospital of Jilin University, Changchun, Jilin 130000, P.R. China
| | - Guangxian Nan
- Department of Neurology, China-Japan Union Hospital of Jilin University, Changchun, Jilin 130000, P.R. China
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15
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Liang Y, Sheikh F. Scaffold Proteins Regulating Extracellular Regulated Kinase Function in Cardiac Hypertrophy and Disease. Front Pharmacol 2016; 7:37. [PMID: 26973524 PMCID: PMC4770026 DOI: 10.3389/fphar.2016.00037] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2015] [Accepted: 02/11/2016] [Indexed: 01/07/2023] Open
Abstract
The mitogen activated protein kinase (MAPK)-extracellular regulated kinase 1/2 (ERK1/2) pathway is a central downstream signaling pathway that is activated in cardiac muscle cells during mechanical and agonist-mediated hypertrophy. Studies in genetic mouse models deficient in ERK-associated MAPK components pathway have further reinforced a direct role for this pathway in stress-induced cardiac hypertrophy and disease. However, more recent studies have highlighted that these signaling pathways may exert their regulatory functions in a more compartmentalized manner in cardiac muscle. Emerging data has uncovered specific MAPK scaffolding proteins that tether MAPK/ERK signaling specifically at the sarcomere and plasma membrane in cardiac muscle and show that deficiencies in these scaffolding proteins alter ERK activity and phosphorylation, which are then critical in altering the cardiac myocyte response to stress-induced hypertrophy and disease progression. In this review, we provide insights on ERK-associated scaffolding proteins regulating cardiac myofilament function and their impact on cardiac hypertrophy and disease.
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Affiliation(s)
- Yan Liang
- Department of Medicine, University of California-San Diego, La Jolla CA, USA
| | - Farah Sheikh
- Department of Medicine, University of California-San Diego, La Jolla CA, USA
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16
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Yousaf R, Meng Q, Hufnagel RB, Xia Y, Puligilla C, Ahmed ZM, Riazuddin S. MAP3K1 function is essential for cytoarchitecture of the mouse organ of Corti and survival of auditory hair cells. Dis Model Mech 2015; 8:1543-53. [PMID: 26496772 PMCID: PMC4728323 DOI: 10.1242/dmm.023077] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2015] [Accepted: 10/16/2015] [Indexed: 12/11/2022] Open
Abstract
MAP3K1 is a serine/threonine kinase that is activated by a diverse set of stimuli and exerts its effect through various downstream effecter molecules, including JNK, ERK1/2 and p38. In humans, mutant alleles of MAP3K1 are associated with 46,XY sex reversal. Until recently, the only phenotype observed in Map3k1tm1Yxia mutant mice was open eyelids at birth. Here, we report that homozygous Map3k1tm1Yxia mice have early-onset profound hearing loss accompanied by the progressive degeneration of cochlear outer hair cells. In the mouse inner ear, MAP3K1 has punctate localization at the apical surface of the supporting cells in close proximity to basal bodies. Although the cytoarchitecture, neuronal wiring and synaptic junctions in the organ of Corti are grossly preserved, Map3k1tm1Yxia mutant mice have supernumerary functional outer hair cells (OHCs) and Deiters' cells. Loss of MAP3K1 function resulted in the downregulation of Fgfr3, Fgf8, Fgf10 and Atf3 expression in the inner ear. Fgfr3, Fgf8 and Fgf10 have a role in induction of the otic placode or in otic epithelium development in mice, and their functional deficits cause defects in cochlear morphogenesis and hearing loss. Our studies suggest that MAP3K1 has an essential role in the regulation of these key cochlear morphogenesis genes. Collectively, our data highlight the crucial role of MAP3K1 in the development and function of the mouse inner ear and hearing. Summary:Map3k1 mutant mice exhibit early-onset profound hearing loss and supernumerary outer hair cells, along with dysregulation of the FGF signaling pathway, accentuating its function in otic epithelium development and morphogenesis.
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Affiliation(s)
- Rizwan Yousaf
- Department of Otorhinolaryngology Head & Neck Surgery, School of Medicine, University of Maryland, Baltimore, MD 21201, USA
| | - Qinghang Meng
- Department of Environmental Health, University of Cincinnati, College of Medicine, Cincinnati, OH 45267, USA
| | - Robert B Hufnagel
- Divisions of Pediatric Ophthalmology and Human Genetics, Cincinnati Children's Hospital Medical Center, University of Cincinnati, Cincinnati, OH 45229, USA
| | - Ying Xia
- Department of Environmental Health, University of Cincinnati, College of Medicine, Cincinnati, OH 45267, USA
| | - Chandrakala Puligilla
- Department of Pathology & Laboratory Medicine, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Zubair M Ahmed
- Department of Otorhinolaryngology Head & Neck Surgery, School of Medicine, University of Maryland, Baltimore, MD 21201, USA
| | - Saima Riazuddin
- Department of Otorhinolaryngology Head & Neck Surgery, School of Medicine, University of Maryland, Baltimore, MD 21201, USA
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17
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Shain AH, Garrido M, Botton T, Talevich E, Yeh I, Sanborn JZ, Chung J, Wang NJ, Kakavand H, Mann GJ, Thompson JF, Wiesner T, Roy R, Olshen AB, Gagnon A, Gray JW, Huh N, Hur JS, Busam KJ, Scolyer RA, Cho RJ, Murali R, Bastian BC. Exome sequencing of desmoplastic melanoma identifies recurrent NFKBIE promoter mutations and diverse activating mutations in the MAPK pathway. Nat Genet 2015; 47:1194-9. [PMID: 26343386 PMCID: PMC4589486 DOI: 10.1038/ng.3382] [Citation(s) in RCA: 188] [Impact Index Per Article: 20.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2015] [Accepted: 07/22/2015] [Indexed: 12/16/2022]
Abstract
Desmoplastic melanoma is an uncommon variant of melanoma with sarcomatous histology, distinct clinical behavior and unknown pathogenesis. We performed low-coverage genome and high-coverage exome sequencing of 20 desmoplastic melanomas, followed by targeted sequencing of 293 genes in a validation cohort of 42 cases. A high mutation burden (median of 62 mutations/Mb) ranked desmoplastic melanoma among the most highly mutated cancers. Mutation patterns strongly implicate ultraviolet radiation as the dominant mutagen, indicating a superficially located cell of origin. Newly identified alterations included recurrent promoter mutations of NFKBIE, encoding NF-κB inhibitor ɛ (IκBɛ), in 14.5% of samples. Common oncogenic mutations in melanomas, in particular in BRAF (encoding p.Val600Glu) and NRAS (encoding p.Gln61Lys or p.Gln61Arg), were absent. Instead, other genetic alterations known to activate the MAPK and PI3K signaling cascades were identified in 73% of samples, affecting NF1, CBL, ERBB2, MAP2K1, MAP3K1, BRAF, EGFR, PTPN11, MET, RAC1, SOS2, NRAS and PIK3CA, some of which are candidates for targeted therapies.
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Affiliation(s)
- A Hunter Shain
- Department of Pathology, University of California, San Francisco, San Francisco, California, USA
- Helen Diller Family Comprehensive Cancer Center, San Francisco, California, USA
- Department of Dermatology, University of California, San Francisco, San Francisco, California, USA
| | - Maria Garrido
- Department of Pathology, University of California, San Francisco, San Francisco, California, USA
- Helen Diller Family Comprehensive Cancer Center, San Francisco, California, USA
- Department of Dermatology, University of California, San Francisco, San Francisco, California, USA
| | - Thomas Botton
- Department of Pathology, University of California, San Francisco, San Francisco, California, USA
- Helen Diller Family Comprehensive Cancer Center, San Francisco, California, USA
- Department of Dermatology, University of California, San Francisco, San Francisco, California, USA
| | - Eric Talevich
- Department of Pathology, University of California, San Francisco, San Francisco, California, USA
- Helen Diller Family Comprehensive Cancer Center, San Francisco, California, USA
- Department of Dermatology, University of California, San Francisco, San Francisco, California, USA
| | - Iwei Yeh
- Department of Pathology, University of California, San Francisco, San Francisco, California, USA
- Helen Diller Family Comprehensive Cancer Center, San Francisco, California, USA
- Department of Dermatology, University of California, San Francisco, San Francisco, California, USA
| | | | - Jongsuk Chung
- Samsung Advanced Institute of Technology, Seoul, Korea
| | - Nicholas J Wang
- Department of Biomedical Engineering, Oregon Health and Sciences University, Portland, Oregon, USA
- Knight Cancer Institute, Oregon Health and Sciences University, Portland, Oregon, USA
| | - Hojabr Kakavand
- Melanoma Institute Australia, Sydney, New South Wales, Australia
- Sydney Medical School, University of Sydney, Sydney, New South Wales, Australia
| | - Graham J Mann
- Melanoma Institute Australia, Sydney, New South Wales, Australia
- Sydney Medical School, University of Sydney, Sydney, New South Wales, Australia
| | - John F Thompson
- Melanoma Institute Australia, Sydney, New South Wales, Australia
- Sydney Medical School, University of Sydney, Sydney, New South Wales, Australia
- Royal Prince Alfred Hospital, Sydney, New South Wales, Australia
| | - Thomas Wiesner
- Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, New York, USA
| | - Ritu Roy
- Helen Diller Family Comprehensive Cancer Center, San Francisco, California, USA
| | - Adam B Olshen
- Helen Diller Family Comprehensive Cancer Center, San Francisco, California, USA
- Department of Epidemiology and Biostatistics, University of California, San Francisco, San Francisco, California, USA
| | - Alexander Gagnon
- Department of Pathology, University of California, San Francisco, San Francisco, California, USA
- Helen Diller Family Comprehensive Cancer Center, San Francisco, California, USA
- Department of Dermatology, University of California, San Francisco, San Francisco, California, USA
| | - Joe W Gray
- Department of Biomedical Engineering, Oregon Health and Sciences University, Portland, Oregon, USA
- Knight Cancer Institute, Oregon Health and Sciences University, Portland, Oregon, USA
| | - Nam Huh
- Samsung Advanced Institute of Technology, Seoul, Korea
| | - Joe S Hur
- Samsung Electronics Headquarters, Seoul, Korea
| | - Klaus J Busam
- Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, New York, USA
| | - Richard A Scolyer
- Melanoma Institute Australia, Sydney, New South Wales, Australia
- Sydney Medical School, University of Sydney, Sydney, New South Wales, Australia
- Royal Prince Alfred Hospital, Sydney, New South Wales, Australia
| | - Raymond J Cho
- Department of Dermatology, University of California, San Francisco, San Francisco, California, USA
| | - Rajmohan Murali
- Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, New York, USA
- Marie-Josée and Henry R. Kravis Center for Molecular Oncology, Memorial Sloan Kettering Cancer Center, New York, New York, USA
| | - Boris C Bastian
- Department of Pathology, University of California, San Francisco, San Francisco, California, USA
- Helen Diller Family Comprehensive Cancer Center, San Francisco, California, USA
- Department of Dermatology, University of California, San Francisco, San Francisco, California, USA
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18
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Hu J, Neiswinger J, Zhang J, Zhu H, Qian J. Systematic Prediction of Scaffold Proteins Reveals New Design Principles in Scaffold-Mediated Signal Transduction. PLoS Comput Biol 2015; 11:e1004508. [PMID: 26393507 PMCID: PMC4578958 DOI: 10.1371/journal.pcbi.1004508] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2015] [Accepted: 08/03/2015] [Indexed: 12/03/2022] Open
Abstract
Scaffold proteins play a crucial role in facilitating signal transduction in eukaryotes by bringing together multiple signaling components. In this study, we performed a systematic analysis of scaffold proteins in signal transduction by integrating protein-protein interaction and kinase-substrate relationship networks. We predicted 212 scaffold proteins that are involved in 605 distinct signaling pathways. The computational prediction was validated using a protein microarray-based approach. The predicted scaffold proteins showed several interesting characteristics, as we expected from the functionality of scaffold proteins. We found that the scaffold proteins are likely to interact with each other, which is consistent with previous finding that scaffold proteins tend to form homodimers and heterodimers. Interestingly, a single scaffold protein can be involved in multiple signaling pathways by interacting with other scaffold protein partners. Furthermore, we propose two possible regulatory mechanisms by which the activity of scaffold proteins is coordinated with their associated pathways through phosphorylation process. Despite their importance in the signaling transduction, there is no systematic effort in identifying and characterizing the scaffold proteins in humans. In this work, we predicted scaffold proteins by integrating the available protein-protein interactions and kinase-substrate relationships. The predicted scaffold proteins showed characteristics for known scaffold proteins, suggesting the fidelity of our prediction. More importantly, the systematic prediction of scaffold proteins provides biological insights in the scaffold-mediated signal transduction. We found that scaffold proteins are likely to form complexes, suggesting that scaffold proteins could participate in diverse signaling pathways through the combinatorial interactions among scaffold proteins. Furthermore, the regulation of scaffold proteins’ activities has not been extensively studied. Our bioinformatics analysis proposed that scaffold proteins themselves might be regulated through phosphorylation process.
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Affiliation(s)
- Jianfei Hu
- Department of Ophthalmology, Johns Hopkins School of Medicine, Baltimore, Maryland, United States of America
| | - Johnathan Neiswinger
- Department of Pharmacology and Molecular Sciences, Johns Hopkins School of Medicine, Baltimore, Maryland, United States of America
| | - Jin Zhang
- Department of Pharmacology and Molecular Sciences, Johns Hopkins School of Medicine, Baltimore, Maryland, United States of America
- The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins School of Medicine, Baltimore, Maryland, United States of America
- Solomon H. Snyder Department of Neuroscience, Johns Hopkins School of Medicine, Baltimore, Maryland, United States of America
| | - Heng Zhu
- Department of Pharmacology and Molecular Sciences, Johns Hopkins School of Medicine, Baltimore, Maryland, United States of America
- The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins School of Medicine, Baltimore, Maryland, United States of America
- Center for High-Throughput Biology, Johns Hopkins School of Medicine, Baltimore, Maryland, United States of America
| | - Jiang Qian
- Department of Ophthalmology, Johns Hopkins School of Medicine, Baltimore, Maryland, United States of America
- The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins School of Medicine, Baltimore, Maryland, United States of America
- * E-mail:
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19
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Shin J, Phan L, Chen J, Lu Z, Lee MH. CSN6 positively regulates c-Jun in a MEKK1-dependent manner. Cell Cycle 2015; 14:3079-87. [PMID: 26237449 DOI: 10.1080/15384101.2015.1078030] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
c-Jun is a proto-oncoprotein that is commonly overexpressed in many types of cancer and is believed to regulate cell proliferation, the cell cycle, and apoptosis by controlling AP-1 activity. Understanding the c-Jun regulation is important to develop treatment strategy for cancer. The COP9 signalosome subunit 6 (CSN6) plays a critical role in ubiquitin-mediated protein degradation. MEKK1 is a serine/threonine kinase and E3 ligase containing PHD/RING domain involved in c-Jun ubiquitination. Here, we show that CSN6 associates with MEKK1 and reduces MEKK1 expression level by facilitating the ubiquitin-mediated degradation of MEKK1. Also we show that CSN6 overexpression diminishes MEKK1-mediated c-Jun ubiquitination, which is manifested in mitigating osmotic stress-mediated c-Jun downregulation. Thus, CSN6 is involved in positively regulating the stability of c-Jun. Overexpression of CSN6 correlates with the upregulation of c-Jun target gene expression in cancer. These findings provide new insight into CSN6-MEKK1-c-Jun axis in tumorigenesis.
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Affiliation(s)
- Jihyun Shin
- a Departments of Molecular and Cellular Oncology ; The University of Texas MD Anderson Cancer Center ; Houston , TX USA
| | - Liem Phan
- a Departments of Molecular and Cellular Oncology ; The University of Texas MD Anderson Cancer Center ; Houston , TX USA
| | - Jian Chen
- a Departments of Molecular and Cellular Oncology ; The University of Texas MD Anderson Cancer Center ; Houston , TX USA
| | - Zhimin Lu
- b Molecular pathology; The University of Texas MD Anderson Cancer Center ; Houston , TX USA
| | - Mong-Hong Lee
- a Departments of Molecular and Cellular Oncology ; The University of Texas MD Anderson Cancer Center ; Houston , TX USA
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20
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BAALC potentiates oncogenic ERK pathway through interactions with MEKK1 and KLF4. Leukemia 2015; 29:2248-56. [DOI: 10.1038/leu.2015.137] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2015] [Accepted: 05/21/2015] [Indexed: 01/16/2023]
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21
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Graziani G, Artuso S, De Luca A, Muzi A, Rotili D, Scimeca M, Atzori MG, Ceci C, Mai A, Leonetti C, Levati L, Bonanno E, Tentori L, Caccuri AM. A new water soluble MAPK activator exerts antitumor activity in melanoma cells resistant to the BRAF inhibitor vemurafenib. Biochem Pharmacol 2015; 95:16-27. [PMID: 25795251 DOI: 10.1016/j.bcp.2015.03.004] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2015] [Accepted: 03/10/2015] [Indexed: 12/01/2022]
Abstract
Recovery of mitogen activated protein kinase (MAPK) or activation of alternative pathways, such as the PI3K/AKT/mTOR, are involved in acquired resistance to BRAF inhibitors which represent the first-line treatment of BRAF-mutated metastatic melanoma. We recently demonstrated that 6-((7-nitrobenzo[c][1,2,5]oxadiazol-4-yl)thio)hexan-1-ol (NBDHEX) and its water soluble analog 2-(2-(2-((7-nitrobenzo[c][1,2,5]oxadiazol-4-yl)thio)ethoxy)ethoxy)ethanol (MC3181) trigger apoptosis in BRAF V600E mutated melanoma cells through activation of the MAPK c-Jun N-terminal kinase (JNK). Herein, we investigated whether NBDHEX and MC3181 might exert antitumor activity against BRAF V600E mutated human melanoma cells rendered resistant to the BRAF inhibitor vemurafenib. To this aim we generated a subline of A375 melanoma resistant in vitro and in vivo to vemurafenib (A375-VR8) and characterized by NRAS G13R mutation, high basal levels of CRAF protein and phospho-activation of AKT. In these cells ERK phosphorylation was not significantly down-modulated by vemurafenib concentrations capable of abrogating ERK phosphorylation in sensitive A375 cells. Both NBDHEX and MC3181 induced marked antiproliferative and apoptotic effects in A375-VR8 cells and, at equitoxic concentrations, caused a strong phosphorylation of JNK, p38, and of the downstream mediators of apoptosis ATF2 and p53. Drug treatment further increased ERK phosphorylation, which was required for the cellular response to the NBD derivatives, as apoptosis was antagonized by the ERK inhibitor FR180204. Finally, in vivo administration of MC3181 provoked JNK activation at the tumor site and markedly reduced A375-VR8 growth. These evidences strongly suggest that the activation of multiple pro-apoptotic MAPK pathways by MC3181 might represent a new strategy for the treatment of melanoma resistant to BRAF inhibitors.
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Affiliation(s)
- Grazia Graziani
- Department of Systems Medicine, University of "Tor Vergata", Rome, Italy
| | - Simona Artuso
- Experimental Chemotherapy Laboratory, Regina Elena National Cancer Institute, Rome, Italy
| | - Anastasia De Luca
- The NAST Centre for Nanoscience & Nanotechnology & Innovative Instrumentation, University of "Tor Vergata", Rome, Italy
| | - Alessia Muzi
- Department of Systems Medicine, University of "Tor Vergata", Rome, Italy
| | - Dante Rotili
- Department of Drug Chemistry and Technologies, "Sapienza" University, Rome, Italy
| | - Manuel Scimeca
- Department of Biomedicine and Prevention, University of "Tor Vergata", Rome, Italy; TMALab s.r.l., Spin-off of University of "Tor Vergata", Rome, Italy
| | | | - Claudia Ceci
- Department of Systems Medicine, University of "Tor Vergata", Rome, Italy
| | - Antonello Mai
- Department of Drug Chemistry and Technologies, "Sapienza" University, Rome, Italy; Pasteur Institute, Cenci-Bolognetti Foundation, "Sapienza" University, Rome, Italy
| | - Carlo Leonetti
- Experimental Chemotherapy Laboratory, Regina Elena National Cancer Institute, Rome, Italy
| | - Lauretta Levati
- Laboratory of Molecular Oncology, "Istituto Dermopatico dell'Immacolata" - IRCCS, Rome, Italy
| | - Elena Bonanno
- Department of Biomedicine and Prevention, University of "Tor Vergata", Rome, Italy; TMALab s.r.l., Spin-off of University of "Tor Vergata", Rome, Italy
| | - Lucio Tentori
- Department of Systems Medicine, University of "Tor Vergata", Rome, Italy
| | - Anna Maria Caccuri
- The NAST Centre for Nanoscience & Nanotechnology & Innovative Instrumentation, University of "Tor Vergata", Rome, Italy; Department of Experimental Medicine and Surgery, University of "Tor Vergata", Rome, Italy.
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Suddason T, Gallagher E. A RING to rule them all? Insights into the Map3k1 PHD motif provide a new mechanistic understanding into the diverse roles of Map3k1. Cell Death Differ 2015; 22:540-8. [PMID: 25613373 PMCID: PMC4356348 DOI: 10.1038/cdd.2014.239] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2014] [Revised: 12/15/2014] [Accepted: 12/17/2014] [Indexed: 12/26/2022] Open
Abstract
Despite the sizable number of components that comprise Mapk cascades, Map3k1 is the only element that contains both a kinase domain and a plant homeodomain (PHD) motif, allowing Map3k1 to regulate the protein phosphorylation and ubiquitin proteasome systems. As such, Map3k1 has complex roles in the regulation of cell death, survival, migration and differentiation. Numerous mouse and human genetic analyses have demonstrated that Map3k1 is of critical importance for the immune system, cardiac tissue, testis, wound healing, tumorigenesis and cancer. Recent gene knockin of Map3k1 to mutate the E2 binding site within the Map3k1 PHD motif and high throughput ubiquitin protein array screening for Map3k1 PHD motif substrates provide critical novel insights into Map3k1 PHD motif signal transduction and bring a brand-new understanding to Map3k1 signaling in mammalian biology.
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Affiliation(s)
- T Suddason
- Department of Medicine, Imperial College London, Du Cane Road, London, UK
| | - E Gallagher
- Department of Medicine, Imperial College London, Du Cane Road, London, UK
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23
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An S, Yang Y, Ward R, Liu Y, Guo XX, Xu TR. Raf-interactome in tuning the complexity and diversity of Raf function. FEBS J 2014; 282:32-53. [PMID: 25333451 DOI: 10.1111/febs.13113] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2014] [Revised: 10/06/2014] [Accepted: 10/14/2014] [Indexed: 12/23/2022]
Abstract
Raf kinases have been intensely studied subsequent to their discovery 30 years ago. The Ras-Raf-mitogen-activated protein kinase/extracellular signal-regulated kinase kinase-extracellular signal-regulated kinase/mitogen-activated protein kinase (Ras-Raf-MEK-ERK/MAPK) signaling pathway is at the heart of the signaling networks that control many fundamental cellular processes and Raf kinases takes centre stage in the MAPK pathway, which is now appreciated to be one of the most common sources of the oncogenic mutations in cancer. The dependency of tumors on this pathway has been clearly demonstrated by targeting its key nodes; however, blockade of the central components of the MAPK pathway may have some unexpected side effects. Over recent years, the Raf-interactome or Raf-interacting proteins have emerged as promising targets for protein-directed cancer therapy. This review focuses on the diversity of Raf-interacting proteins and discusses the mechanisms by which these proteins regulate Raf function, as well as the implications of targeting Raf-interacting proteins in the treatment of human cancer.
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Affiliation(s)
- Su An
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Yunnan, China
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24
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Das DK, Rahate SG, Mehta BP, Gawde HM, Tamhankar PM. Mutation analysis of mitogen activated protein kinase 1 gene in Indian cases of 46,XY disorder of sex development. INDIAN JOURNAL OF HUMAN GENETICS 2014; 19:437-42. [PMID: 24497709 PMCID: PMC3897139 DOI: 10.4103/0971-6866.124372] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
BACKGROUND: Determination of sex is the result of cascade of molecular events that cause undifferentiated bipotential gonad to develop as a testis or an ovary. A series of genes such as SRY, steroidogenic factor-1 (SF1), AR, SRD5 α, Desert hedgehog (DHH) etc., have been reported to have a significant role in development of sex in the fetus and secondary sexual characteristics at the time of puberty. Recently, mitogen activated protein kinase kinase kinase 1 (MAP3K1) gene was found to be associated with 46, XY disorders of sex development (DSD). AIM: The present study is focused to identify mutations in MAP3K1 gene in the cohort of 10 Indian patients with 46,XY DSD including one family with two affected sisters. These patients were already screened for SRY, SF1 and DHH gene, but no mutation was observed in any of these genes. MATERIALS AND METHODS: The entire coding regions of MAP3K1 were amplified and sequenced using the gene specific primers. RESULTS AND DISCUSSIONS: Sequence analysis of MAP3K1 gene has revealed four variants including one missense, two silent and one deletion mutation. The missense mutation p.D806N was observed in four patients with hypospadias. Two patients showed the presence of silent mutation p.Q1028Q present in exon 14. Another silent mutation p.T428T was observed in a patient with gonadal dysgenesis. We have also observed one deletion mutation p. 942insT present in two patients. The pathogenicity of the missense mutation p.D806N was carried out using in-silico approach. Sequence homology analysis has revealed that the aspartate at 806 was found to be well-conserved across species, indicated the importance of this residue. The score for polyphen analysis of this mutation was found to be 0.999 indicating to be pathogenic mutation. Since, p.D806N mutation was found to be important residue; it might contribute to sexual development. We have reported the presence of mutations/polymorphism in MAP3K1 gene. All the mutations were found to be polymorphism upon comparing to single nucleotide polymorphism database. However, in-silico analysis of the missense mutation revealed to be a pathogenic mutation.
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Affiliation(s)
- Dhanjit Kumar Das
- Genetic Research Centre, National Institute for Research in Reproductive Health, Parel, Mumbai, Maharashtra, India
| | - Subodh G Rahate
- Genetic Research Centre, National Institute for Research in Reproductive Health, Parel, Mumbai, Maharashtra, India
| | - Bhakti P Mehta
- Genetic Research Centre, National Institute for Research in Reproductive Health, Parel, Mumbai, Maharashtra, India
| | - Harshavardhan M Gawde
- Genetic Research Centre, National Institute for Research in Reproductive Health, Parel, Mumbai, Maharashtra, India
| | - Parag M Tamhankar
- Genetic Research Centre, National Institute for Research in Reproductive Health, Parel, Mumbai, Maharashtra, India
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25
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Currie HN, Vrana JA, Han AA, Scardoni G, Boggs N, Boyd JW. An approach to investigate intracellular protein network responses. Chem Res Toxicol 2014; 27:17-26. [PMID: 24359296 DOI: 10.1021/tx400247g] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Modern toxicological evaluations have evolved to consider toxicity as a perturbation of biological pathways or networks. As such, toxicity testing approaches are shifting from common end point evaluations to pathway based approaches, where the degree of perturbation of select biological pathways is monitored. These new approaches are greatly increasing the data available to toxicologists, but methods of analyses to determine the inter-relationships between potentially affected pathways are needed to fully understand the consequences of exposure. An approach to construct dose-response curves that use graph theory to describe network perturbations among three disparate mitogen-activated protein kinase (MAPK) pathways is presented. Mitochondrial stress was induced in human hepatocytes (HepG2) by exposing the cells to increasing doses of the complex I inhibitor, deguelin. The relative phosphorylation responses of proteins involved in the regulation of the stress response were measured. Graph theory was applied to the phosphorylation data to obtain parameters describing the network perturbations at each individual dose tested. The graph theory results depicted the dynamic nature of the relationship between p38, JNK, and ERK1/2 under conditions of mitochondrial stress and revealed shifts in the relationships between these MAPK pathways at low doses. The inter-relationship, or crosstalk, among these 3 traditionally linear MAPK cascades was further probed by coexposing cells to deguelin plus SB202190 (JNK and p38 inhibitor) or deguelin plus SB202474 (JNK inhibitor). The cells exposed to deguelin plus SB202474 resulted in significantly decreased viability, which could be visualized and attributed to the decrease of ERK1/2 network centrality. The approach presented here allows for the construction and visualization of dose-response curves that describe network perturbations induced by chemical stress, which provides an informative and sensitive means of assessing toxicological effects on biological systems.
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Affiliation(s)
- Holly N Currie
- Department of Chemistry, West Virginia University , 217 Clark Hall, Prospect Street, Morgantown, West Virginia 26506, United States
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26
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Pham TT, Angus SP, Johnson GL. MAP3K1: Genomic Alterations in Cancer and Function in Promoting Cell Survival or Apoptosis. Genes Cancer 2014; 4:419-26. [PMID: 24386504 DOI: 10.1177/1947601913513950] [Citation(s) in RCA: 93] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2013] [Accepted: 11/02/2013] [Indexed: 12/15/2022] Open
Abstract
MAP3K1 is a member of the mitogen-activated protein kinase kinase kinase (MAP3K) family of serine/threonine kinases. MAP3K1 regulates JNK activation and is unique among human kinases in that it also encodes an E3 ligase domain that ubiquitylates c-Jun and ERK1/2. Full length MAP3K1 regulates cell migration and contributes to pro-survival signaling while its caspase 3-mediated cleavage generates a C-terminal kinase domain that promotes apoptosis. The critical function of MAP3K1 in cell fate decisions suggests that it may be a target for deregulation in cancer. Recent large-scale genomic studies have revealed that MAP3K1 copy number loss and somatic missense or nonsense mutations are observed in a significant number of different cancers, being most prominent in luminal breast cancer. The alteration of MAP3K1 in diverse cancer types demonstrates the importance of defining phenotypes for possible therapeutic targeting of tumor cell vulnerabilities created when MAP3K1 function is lost or gained.
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Affiliation(s)
- Trang T Pham
- Department of Pharmacology, Lineberger Comprehensive Cancer Center, University of North Carolina School of Medicine, Chapel Hill, NC, USA
| | - Steven P Angus
- Department of Pharmacology, Lineberger Comprehensive Cancer Center, University of North Carolina School of Medicine, Chapel Hill, NC, USA
| | - Gary L Johnson
- Department of Pharmacology, Lineberger Comprehensive Cancer Center, University of North Carolina School of Medicine, Chapel Hill, NC, USA
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27
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Low-copy piggyBac transposon mutagenesis in mice identifies genes driving melanoma. Proc Natl Acad Sci U S A 2013; 110:E3640-9. [PMID: 24003131 DOI: 10.1073/pnas.1314435110] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Despite considerable efforts to sequence hypermutated cancers such as melanoma, distinguishing cancer-driving genes from thousands of recurrently mutated genes remains a significant challenge. To circumvent the problematic background mutation rates and identify new melanoma driver genes, we carried out a low-copy piggyBac transposon mutagenesis screen in mice. We induced eleven melanomas with mutation burdens that were 100-fold lower relative to human melanomas. Thirty-eight implicated genes, including two known drivers of human melanoma, were classified into three groups based on high, low, or background-level mutation frequencies in human melanomas, and we further explored the functional significance of genes in each group. For two genes overlooked by prevailing discovery methods, we found that loss of membrane associated guanylate kinase, WW and PDZ domain containing 2 and protein tyrosine phosphatase, receptor type, O cooperated with the v-raf murine sarcoma viral oncogene homolog B (BRAF) recurrent V600E mutation to promote cellular transformation. Moreover, for infrequently mutated genes often disregarded by current methods, we discovered recurrent mitogen-activated protein kinase kinase kinase 1 (Map3k1)-activating insertions in our screen, mirroring recurrent MAP3K1 up-regulation in human melanomas. Aberrant expression of Map3k1 enabled growth factor-autonomous proliferation and drove BRAF-independent ERK signaling, thus shedding light on alternative means of activating this prominent signaling pathway in melanoma. In summary, our study contributes several previously undescribed genes involved in melanoma and establishes an important proof-of-principle for the utility of the low-copy transposon mutagenesis approach for identifying cancer-driving genes, especially those masked by hypermutation.
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28
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When ubiquitination meets phosphorylation: a systems biology perspective of EGFR/MAPK signalling. Cell Commun Signal 2013; 11:52. [PMID: 23902637 PMCID: PMC3734146 DOI: 10.1186/1478-811x-11-52] [Citation(s) in RCA: 141] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2013] [Accepted: 07/26/2013] [Indexed: 11/10/2022] Open
Abstract
Ubiquitination, the covalent attachment of ubiquitin to target proteins, has emerged as a ubiquitous post-translational modification (PTM) whose function extends far beyond its original role as a tag for protein degradation identified three decades ago. Although sharing parallel properties with phosphorylation, ubiquitination distinguishes itself in important ways. Nevertheless, the interplay and crosstalk between ubiquitination and phosphorylation events have become a recurrent theme in cell signalling regulation. Understanding how these two major PTMs intersect to regulate signal transduction is an important research question. In this review, we first discuss the involvement of ubiquitination in the regulation of the EGF-mediated ERK signalling pathway via the EGF receptor, highlighting the interplay between ubiquitination and phosphorylation in this cancer-implicated system and addressing open questions. The roles of ubiquitination in pathways crosstalking to EGFR/MAPK signalling will then be discussed. In the final part of the review, we demonstrate the rich and versatile dynamics of crosstalk between ubiquitination and phosphorylation by using quantitative modelling and analysis of network motifs commonly observed in cellular processes. We argue that given the overwhelming complexity arising from inter-connected PTMs, a quantitative framework based on systems biology and mathematical modelling is needed to efficiently understand their roles in cell signalling.
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29
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Pan CQ, Sudol M, Sheetz M, Low BC. Modularity and functional plasticity of scaffold proteins as p(l)acemakers in cell signaling. Cell Signal 2012; 24:2143-65. [PMID: 22743133 DOI: 10.1016/j.cellsig.2012.06.002] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2012] [Revised: 05/22/2012] [Accepted: 06/16/2012] [Indexed: 01/14/2023]
Abstract
Cells coordinate and integrate various functional modules that control their dynamics, intracellular trafficking, metabolism and gene expression. Such capacity is mediated by specific scaffold proteins that tether multiple components of signaling pathways at plasma membrane, Golgi apparatus, mitochondria, endoplasmic reticulum, nucleus and in more specialized subcellular structures such as focal adhesions, cell-cell junctions, endosomes, vesicles and synapses. Scaffold proteins act as "pacemakers" as well as "placemakers" that regulate the temporal, spatial and kinetic aspects of protein complex assembly by modulating the local concentrations, proximity, subcellular dispositions and biochemical properties of the target proteins through the intricate use of their modular protein domains. These regulatory mechanisms allow them to gate the specificity, integration and crosstalk of different signaling modules. In addition to acting as physical platforms for protein assembly, many professional scaffold proteins can also directly modify the properties of their targets while they themselves can be regulated by post-translational modifications and/or mechanical forces. Furthermore, multiple scaffold proteins can form alliances of higher-order regulatory networks. Here, we highlight the emerging themes of scaffold proteins by analyzing their common and distinctive mechanisms of action and regulation, which underlie their functional plasticity in cell signaling. Understanding these mechanisms in the context of space, time and force should have ramifications for human physiology and for developing new therapeutic approaches to control pathological states and diseases.
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Affiliation(s)
- Catherine Qiurong Pan
- Cell Signaling and Developmental Biology Laboratory, Department of Biological Sciences, National University of Singapore, Republic of Singapore.
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30
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ERK1/2 MAP kinases: structure, function, and regulation. Pharmacol Res 2012; 66:105-43. [PMID: 22569528 DOI: 10.1016/j.phrs.2012.04.005] [Citation(s) in RCA: 1099] [Impact Index Per Article: 91.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/19/2012] [Accepted: 04/20/2012] [Indexed: 11/21/2022]
Abstract
ERK1 and ERK2 are related protein-serine/threonine kinases that participate in the Ras-Raf-MEK-ERK signal transduction cascade. This cascade participates in the regulation of a large variety of processes including cell adhesion, cell cycle progression, cell migration, cell survival, differentiation, metabolism, proliferation, and transcription. MEK1/2 catalyze the phosphorylation of human ERK1/2 at Tyr204/187 and then Thr202/185. The phosphorylation of both tyrosine and threonine is required for enzyme activation. Whereas the Raf kinase and MEK families have narrow substrate specificity, ERK1/2 catalyze the phosphorylation of hundreds of cytoplasmic and nuclear substrates including regulatory molecules and transcription factors. ERK1/2 are proline-directed kinases that preferentially catalyze the phosphorylation of substrates containing a Pro-Xxx-Ser/Thr-Pro sequence. Besides this primary structure requirement, many ERK1/2 substrates possess a D-docking site, an F-docking site, or both. A variety of scaffold proteins including KSR1/2, IQGAP1, MP1, β-Arrestin1/2 participate in the regulation of the ERK1/2 MAP kinase cascade. The regulatory dephosphorylation of ERK1/2 is mediated by protein-tyrosine specific phosphatases, protein-serine/threonine phosphatases, and dual specificity phosphatases. The combination of kinases and phosphatases make the overall process reversible. The ERK1/2 catalyzed phosphorylation of nuclear transcription factors including those of Ets, Elk, and c-Fos represents an important function and requires the translocation of ERK1/2 into the nucleus by active and passive processes involving the nuclear pore. These transcription factors participate in the immediate early gene response. The activity of the Ras-Raf-MEK-ERK cascade is increased in about one-third of all human cancers, and inhibition of components of this cascade by targeted inhibitors represents an important anti-tumor strategy. Thus far, however, only inhibition of mutant B-Raf (Val600Glu) has been found to be therapeutically efficacious.
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31
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Kubota Y, O'Grady P, Saito H, Takekawa M. Oncogenic Ras abrogates MEK SUMOylation that suppresses the ERK pathway and cell transformation. Nat Cell Biol 2011; 13:282-91. [PMID: 21336309 DOI: 10.1038/ncb2169] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2010] [Accepted: 11/30/2010] [Indexed: 12/11/2022]
Abstract
The ERK (extracellular signal-regulated kinase) MAPK (mitogen-activated protein kinase) cascade (Raf-MEK-ERK) mediates mitogenic signalling, and is frequently hyperactivated by Ras oncogenes in human cancer. The entire range of activities of multifunctional Ras in carcinogenesis remains elusive. Here we report that the ERK pathway is downregulated by MEK (MAPK-ERK kinase) SUMOylation, which is inhibited by oncogenic Ras. MEK SUMOylation blocked ERK activation by disrupting the specific docking interaction between MEK and ERK. Expression of un-SUMOylatable MEK enhanced ERK activation, cell differentiation, proliferation and malignant transformation by oncogenic ErbB2 or Raf, but not by active Ras. Interestingly, MEK SUMOylation was abrogated in cancer cells harbouring Ras mutations. Oncogenic Ras inhibits MEK SUMOylation by impairing the function of the MEKK1 MAPKKK as a SUMO-E3 ligase specific for MEK. Furthermore, forced enhancement of MEK SUMOylation suppressed Ras-induced cell transformation. Thus, oncogenic Ras efficiently activates the ERK pathway both by activating Raf and by inhibiting MEK SUMOylation, thereby inducing carcinogenesis.
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Affiliation(s)
- Yuji Kubota
- Department of Molecular Cell Signaling, Institute of Medical Science, The University of Tokyo, 4-6-1 Shirokanedai, Tokyo 108-8639, Japan
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32
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Ritterhoff S, Farah CM, Grabitzki J, Lochnit G, Skurat AV, Schmitz ML. The WD40-repeat protein Han11 functions as a scaffold protein to control HIPK2 and MEKK1 kinase functions. EMBO J 2010; 29:3750-61. [PMID: 20940704 PMCID: PMC2989105 DOI: 10.1038/emboj.2010.251] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2010] [Accepted: 09/17/2010] [Indexed: 12/18/2022] Open
Abstract
Protein kinases are organized in hierarchical networks that are assembled and regulated by scaffold proteins. Here, we identify the evolutionary conserved WD40-repeat protein Han11 as an interactor of the kinase homeodomain-interacting protein kinase 2 (HIPK2). In vitro experiments showed the direct binding of Han11 to HIPK2, but also to the kinases DYRK1a, DYRK1b and mitogen-activated protein kinase kinase kinase 1 (MEKK1). Han11 was required to allow coupling of MEKK1 to DYRK1 and HIPK2. Knockdown experiments in Caenorhabditis elegans showed the relevance of the Han11 orthologs Swan-1 and Swan-2 for the osmotic stress response. Downregulation of Han11 in human cells lowered the threshold and amplitude of HIPK2- and MEKK1-triggered signalling events and changed the kinetics of kinase induction. Han11 knockdown changed the amplitude and time dependence of HIPK2-driven transcription in response to DNA damage and also interfered with MEKK1-triggered gene expression and stress signalling. Impaired signal transmission also occurred upon interference with stoichiometrically assembled signalling complexes by Han11 overexpression. Collectively, these experiments identify Han11 as a novel scaffold protein regulating kinase signalling by HIPK2 and MEKK1.
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Affiliation(s)
- Stefanie Ritterhoff
- Institute of Biochemistry, Medical Faculty, Justus-Liebig-University, Giessen, Germany
| | - Carla M Farah
- Institute of Biochemistry, Medical Faculty, Justus-Liebig-University, Giessen, Germany
| | - Julia Grabitzki
- Institute of Biochemistry, Medical Faculty, Justus-Liebig-University, Giessen, Germany
| | - Günter Lochnit
- Institute of Biochemistry, Medical Faculty, Justus-Liebig-University, Giessen, Germany
| | - Alexander V Skurat
- Department of Biochemistry and Molecular Biology, Indiana University School of Medicine, Indianapolis, IN, USA
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33
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Deng M, Ding W, Min X, Xia Y. MLCK-independent phosphorylation of MLC20 and its regulation by MAP kinase pathway in human bladder smooth muscle cells. Cytoskeleton (Hoboken) 2010; 68:139-49. [PMID: 20722044 DOI: 10.1002/cm.20471] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2010] [Revised: 01/10/2011] [Accepted: 01/10/2011] [Indexed: 01/11/2023]
Abstract
Myosins are a superfamily of actin-based molecular motor proteins, which hydrolyze ATP and generate various forms of eukaryotic motility and muscle contraction. Myosin light chain 20 (MLC20) is small ring around the neck region of heavy chain of myosins. Phosphorylation of MLC20 is thought to play a key role in regulation of smooth muscle contraction. Calcium- and calmodulin-dependent myosin light chain kinase (MLCK) is considered the primary regulator of MLC20 phosphorylation. However, several observations in smooth muscle contraction cannot be explained by the mode of phosphorylation. By performing a series of experiments in vitro and in vivo, we report here MLCK-independent MLC20 phosphorylation. Gene expression study reveals that expression of MLCK in smooth muscles is inconsistent with MLC20 phosphorylation at Ser19. None of inactivating calmodulin/MLCK, depriving of calcium and silencing MLCK expression by siRNA blocks effectively the phosphorylation of MLC20 at Ser19. In addition, by overexpressing active human MAP (mitogen-activated protein)-ERK kinase kinase-1 (MEKK1) and blocking its downstream messengers, we have demonstrated a new regulatory system of MLC phosphorylation via MEKK1, which downregulates Ser19 phosphorylation of MLC20 through its downstream molecules, p38, JNK, and ERK in human bladder smooth muscle cells.
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Affiliation(s)
- Maoxian Deng
- Department of Animal Biology, School of Animal Husbandry and Veterinary Medicine, Jiangsu Polytechnic College of Agriculture and Forestry, Jurong, Jiangsu, China.
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Farhan H, Wendeler MW, Mitrovic S, Fava E, Silberberg Y, Sharan R, Zerial M, Hauri HP. MAPK signaling to the early secretory pathway revealed by kinase/phosphatase functional screening. ACTA ACUST UNITED AC 2010; 189:997-1011. [PMID: 20548102 PMCID: PMC2886346 DOI: 10.1083/jcb.200912082] [Citation(s) in RCA: 144] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
To what extent the secretory pathway is regulated by cellular signaling is unknown. In this study, we used RNA interference to explore the function of human kinases and phosphatases in controlling the organization of and trafficking within the secretory pathway. We identified 122 kinases/phosphatases that affect endoplasmic reticulum (ER) export, ER exit sites (ERESs), and/or the Golgi apparatus. Numerous kinases/phosphatases regulate the number of ERESs and ER to Golgi protein trafficking. Among the pathways identified, the Raf-MEK (MAPK/ERK [extracellular signal-regulated kinase] kinase)-ERK cascade, including its regulatory proteins CNK1 (connector enhancer of the kinase suppressor of Ras-1) and neurofibromin, controls the number of ERESs via ERK2, which targets Sec16, a key regulator of ERESs and COPII (coat protein II) vesicle biogenesis. Our analysis reveals an unanticipated complexity of kinase/phosphatase-mediated regulation of the secretory pathway, uncovering a link between growth factor signaling and ER export.
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Affiliation(s)
- Hesso Farhan
- Biozentrum, Universität Basel, 4056 Basel, Switzerland
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Rodriguez MCS, Petersen M, Mundy J. Mitogen-activated protein kinase signaling in plants. ANNUAL REVIEW OF PLANT BIOLOGY 2010; 61:621-49. [PMID: 20441529 DOI: 10.1146/annurev-arplant-042809-112252] [Citation(s) in RCA: 676] [Impact Index Per Article: 48.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Eukaryotic mitogen-activated protein kinase (MAPK) cascades have evolved to transduce environmental and developmental signals into adaptive and programmed responses. MAPK cascades relay and amplify signals via three types of reversibly phosphorylated kinases leading to the phosphorylation of substrate proteins, whose altered activities mediate a wide array of responses, including changes in gene expression. Cascades may share kinase components, but their signaling specificity is maintained by spaciotemporal constraints and dynamic protein-protein interactions and by mechanisms that include crossinhibition, feedback control, and scaffolding. Plant MAPK cascades regulate numerous processes, including stress and hormonal responses, innate immunity, and developmental programs. Genetic analyses have uncovered several predominant MAPK components shared by several of these processes including the Arabidopsis thaliana MAPKs MPK3, 4, and 6 and MAP2Ks MKK1, 2, 4, and 5. Future work needs to focus on identifying substrates of MAPKs, and on understanding how specificity is achieved among MAPK signaling pathways.
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Geest CR, Coffer PJ. MAPK signaling pathways in the regulation of hematopoiesis. J Leukoc Biol 2009; 86:237-50. [PMID: 19498045 DOI: 10.1189/jlb.0209097] [Citation(s) in RCA: 203] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
The MAPKs are a family of serine/threonine kinases that play an essential role in connecting cell-surface receptors to changes in transcriptional programs. MAPKs are part of a three-component kinase module consisting of a MAPK, an upstream MEK, and a MEKK that couples the signals from cell-surface receptors to trigger downstream pathways. Three major groups of MAPKs have been characterized in mammals, including ERKs, JNKs, and p38MAPKs. Over the last decade, extensive work has established that these proteins play critical roles in the regulation of a wide variety of cellular processes including cell growth, migration, proliferation, differentiation, and survival. It has been demonstrated that ERK, JNK, and p38MAPK activity can be regulated in response to a plethora of hematopoietic cytokines and growth factors that play critical roles in hematopoiesis. In this review, we summarize the current understanding of MAPK function in the regulation of hematopoiesis in general and myelopoiesis in particular. In addition, the consequences of aberrant MAPK activation in the pathogenesis of various myeloid malignancies will be discussed.
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Affiliation(s)
- Christian R Geest
- Department of Immunology, University Medical Center Utrecht, Utrecht, The Netherlands
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Craig EA, Stevens MV, Vaillancourt RR, Camenisch TD. MAP3Ks as central regulators of cell fate during development. Dev Dyn 2009; 237:3102-14. [PMID: 18855897 DOI: 10.1002/dvdy.21750] [Citation(s) in RCA: 96] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
The cytoplasmic serine/threonine kinases transduce extracellular signals into regulatory events that impact cellular responses. The induction of one kinase triggers the activation of several downstream kinases, leading to the regulation of transcription factors to affect gene function. This arrangement allows for the kinase cascade to be amplified, and integrated according to the cellular context. An upstream mitogen or growth factor signal initiates a module of three kinases: a mitogen-activated protein (MAP) kinase kinase kinase (MAPKKK; e.g., Raf) that phosphorylates and activates a MAP kinase kinase (MAPKK; e.g., MEK) and finally activation of MAP kinase (MAPK; e.g., ERK). Thus, this MAP3K-MAP2K-MAPK module represents critical effectors that regulate extracellular stimuli into cellular responses, such as differentiation, proliferation, and apoptosis all of which function during development. There are 21 characterized MAP3Ks that activate known MAP2Ks, and they function in many aspects of developmental biology. This review summarizes known transduction routes linked to each MAP3K and highlights mouse models that provide clues to their physiological functions. This perspective reveals that some of these MAP3K effectors may have redundant functions, and also serve as unique nexus depending on the context of the signaling pathway.
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Affiliation(s)
- Evisabel A Craig
- Department of Pharmacology and Toxicology, College of Pharmacy, University of Arizona, Tucson, Arizona, USA
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The PP2C Alphabet is a negative regulator of stress-activated protein kinase signaling in Drosophila. Genetics 2008; 181:567-79. [PMID: 19064708 DOI: 10.1534/genetics.108.096461] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
The Jun N-terminal kinase and p38 pathways, also known as stress-activated protein kinase (SAPK) pathways, are signaling conduits reiteratively used throughout the development and adult life of metazoans where they play central roles in the control of apoptosis, immune function, and environmental stress responses. We recently identified a Drosophila Ser/Thr phosphatase of the PP2C family, named Alphabet (Alph), which acts as a negative regulator of the Ras/ERK pathway. Here we show that Alph also plays an inhibitory role with respect to Drosophila SAPK signaling during development as well as under stress conditions such as oxidative or genotoxic stresses. Epistasis experiments suggest that Alph acts at a step upstream of the MAPKKs Hep and Lic. Consistent with this interpretation, biochemical experiments identify the upstream MAPKKKs Slpr, Tak1, and Wnd as putative substrates. Together with previous findings, this work identifies Alph as a general attenuator of MAPK signaling in Drosophila.
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Ung CY, Li H, Ma XH, Jia J, Li BW, Low BC, Chen YZ. Simulation of the regulation of EGFR endocytosis and EGFR-ERK signaling by endophilin-mediated RhoA-EGFR crosstalk. FEBS Lett 2008; 582:2283-90. [PMID: 18505685 DOI: 10.1016/j.febslet.2008.05.026] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2008] [Revised: 04/28/2008] [Accepted: 05/16/2008] [Indexed: 12/24/2022]
Abstract
Deregulations of EGFR endocytosis in EGFR-ERK signaling are known to cause cancers and developmental disorders. Mutations that impaired c-Cbl-EGFR association delay EGFR endocytosis and produce higher mitogenic signals in lung cancer. ROCK, an effector of small GTPase RhoA was shown to negatively regulate EGFR endocytosis via endophilin A1. A mathematical model was developed to study how RhoA and ROCK regulate EGFR endocytosis. Our study suggested that over-expressing RhoA as well as ROCK prolonged ERK activation partly by reducing EGFR endocytosis. Overall, our study hypothesized an alternative role of RhoA in tumorigenesis in addition to its regulation of cytoskeleton and cell motility.
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Affiliation(s)
- Choong Yong Ung
- Bioinformatics and Drug Design Group, Department of Pharmacy, National University of Singapore, 3 Science Drive 2, Singapore 117543, Singapore
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Ramos JW. The regulation of extracellular signal-regulated kinase (ERK) in mammalian cells. Int J Biochem Cell Biol 2008; 40:2707-19. [PMID: 18562239 DOI: 10.1016/j.biocel.2008.04.009] [Citation(s) in RCA: 354] [Impact Index Per Article: 22.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2008] [Revised: 04/18/2008] [Accepted: 04/25/2008] [Indexed: 01/03/2023]
Abstract
The mitogen-activated protein (MAP) kinase extracellular-signal-regulated kinases (ERKs) are activated by diverse mechanisms. These include ligation of receptor tyrosine kinases such as epidermal growth factor (EGF) and cell adhesion receptors such as the integrins. In general, ligand binding of these receptors leads to GTP loading and activation of the small GTPase Ras, which recruits Raf to the membrane where it is activated. Raf subsequently phosphorylates the dual specificity MAP/ERK kinase (MEK1/2) which in turn phosphorylates and thereby activates ERK. ERK is a promiscuous kinase and can phosphorylate more than 100 different substrates. Therefore activation of ERK can affect a broad array of cellular functions including proliferation, survival, apoptosis, motility, transcription, metabolism and differentiation. ERK activity is controlled by many distinct mechanisms. Scaffold proteins control when and where ERK is activated while anchoring proteins can restrain ERK localization to specific subcellular compartments. Meanwhile, phosphatases dephosphorylate and inactivate ERK thereby shutting off the pathway. Finally, several feedback mechanisms have been identified downstream of ERK activation. Here we will focus on the diverse mechanisms of ERK regulation in mammalian cells.
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Affiliation(s)
- Joe W Ramos
- Department of Natural Products and Cancer Biology, Cancer Research Center of Hawaii, University of Hawaii at Manoa, 651 Ilalo Street, Honolulu, HI 96813, USA.
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Sturgill TW. MAP kinase: it's been longer than fifteen minutes. Biochem Biophys Res Commun 2008; 371:1-4. [PMID: 18406346 DOI: 10.1016/j.bbrc.2008.04.002] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2008] [Accepted: 04/02/2008] [Indexed: 10/22/2022]
Abstract
The review highlights evidence for different functions in the cell cycle of the two MAP kinase kinases, MEK1 and MEK2, and the two MAP kinases, ERK1 and ERK2. Functional differences may explain why instances of cell cycle arrest can be MEK1 or MEK2 dependent.
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Affiliation(s)
- Thomas W Sturgill
- Department of Pharmacology, University of Virginia, 1300 Jefferson Park Avenue, Charlottesville, VA 22908, USA.
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May LT, Hill SJ. ERK phosphorylation: spatial and temporal regulation by G protein-coupled receptors. Int J Biochem Cell Biol 2008; 40:2013-7. [PMID: 18502166 DOI: 10.1016/j.biocel.2008.04.001] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2007] [Revised: 03/28/2008] [Accepted: 04/02/2008] [Indexed: 10/22/2022]
Abstract
G protein-coupled receptors (GPCRs) are a major target in the drug discovery process. One important response that results from activation of a wide range of GPCRs is activation of the ERK signalling cascade. Given the abundance of both upstream activators and downstream targets of ERK1/2, the precise spatiotemporal control of ERK1/2 phosphorylation is crucial for maintaining the specificity of the physiological outcome. ERK activity is regulated via a number of mechanisms including compartmentalisation and scaffolding proteins. These scaffolding proteins can enhance the transduction of a specific signalling pathway by targeting pathway components to particular intracellular locations or signalling complexes. Recently, a number of fluorescent indicators of ERK1/2 phosphorylation have been developed that allow the regulation of this pathway to be investigated with greater spatiotemporal resolution than was previously possible. These fluorescent probes in conjunction with those for other signalling cascades should help unravel the spatiotemporal organisation of this pathway.
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Affiliation(s)
- Lauren T May
- Institute of Cell Signalling, School of Biomedical Sciences, Medical School, The University of Nottingham, Nottingham NG7 2UH, UK
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Junttila MR, Li S, Westermarck J. Phosphatase‐mediated crosstalk between MAPK signaling pathways in the regulation of cell survival. FASEB J 2007; 22:954-65. [PMID: 18039929 DOI: 10.1096/fj.06-7859rev] [Citation(s) in RCA: 616] [Impact Index Per Article: 36.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Melissa R. Junttila
- Turku Centre for BiotechnologyUniversity of Turku and Åbo Akademi UniversityTurkuFinland
| | - Song‐Ping Li
- Institute of BiomedicineDepartment of Molecular MedicineUniversity of Helsinki, and National Public Health Institute (KTL)BiomedicumHelsinkiFinland
| | - Jukka Westermarck
- Turku Centre for BiotechnologyUniversity of Turku and Åbo Akademi UniversityTurkuFinland
- Institute of Medical TechnologyUniversity of Tampere and University Hospital of TampereTampereFinland
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Abstract
Mitogen-activated protein kinases (MAPKs) regulate critical signaling pathways involved in cell proliferation, differentiation and apoptosis. Recent studies have shown that a novel class of scaffold proteins mediates the structural and functional organization of the three-tier MAPK module. By linking the MAP3K, MAP2K and MAPK into a multienzyme complex, these MAPK-specific scaffold proteins provide an insulated physical conduit through which signals from the respective MAPK can be transmitted to the appropriate spatiotemporal cellular loci. Scaffold proteins play a determinant role in modulating the signaling strength of their cognate MAPK module by regulating the signal amplitude and duration. The scaffold proteins themselves are finely regulated resulting in dynamic intra- and inter-molecular interactions that can modulate the signaling outputs of MAPK modules. This review focuses on defining the diverse mechanisms by which these scaffold proteins interact with their respective MAPK modules and the role of such interactions in the spatiotemporal organization as well as context-specific signaling of the different MAPK modules.
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Affiliation(s)
- D N Dhanasekaran
- Fels Institute for Cancer Research and Molecular Biology, Temple University School of Medicine, Philadelphia, PA 19140, USA
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Abstract
ERK1/2 is an important subfamily of mitogen-activated protein kinases that control a broad range of cellular activities and physiological processes. ERK1/2 can be activated transiently or persistently by MEK1/2 and upstream MAP3Ks in conjunction with regulation and involvement of scaffolding proteins and phosphatases. Activation of ERK1/2 generally promotes cell survival; but under certain conditions, ERK1/2 can have pro-apoptotic functions.
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Affiliation(s)
- Zhimin Lu
- Brain Tumor Center and Department of Neuro-Oncology, The University of Texas M. D. Anderson Cancer Center, The University of Texas Graduate School of Biomedical Sciences at Houston, Houston, Texas 77030, USA.
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48
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Bauer I, Al Sarraj J, Vinson C, Larsen R, Thiel G. Interleukin-1β and tetradecanoylphorbol acetate-induced biosynthesis of tumor necrosis factor α in human hepatoma cells involves the transcription factors ATF2 and c-Jun and stress-activated protein kinases. J Cell Biochem 2007; 100:242-55. [PMID: 16888805 DOI: 10.1002/jcb.21075] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
The proinflammatory cytokine tumor necrosis factor (TNF) alpha is mainly produced in cells from the monocyte/macrophage lineage. TNFalpha is also a key signaling molecule in the liver functioning as an important physiological and pathogenic mediator. In hepatocytes or human hepatoma cells TNFalpha is expressed at extremely low levels but TNFalpha biosynthesis can be induced by interleukin (IL)-1beta or 12-O-tetradecanoylphorbol-13-acetate (TPA). Here, we show that IL-1beta and TPA stimulated TNFalpha gene transcription in hepatoma cells mediated by a composite TPA-responsive element/cAMP response element. Both IL-1beta and TPA triggered phosphorylation and activation of the basic region leucine zipper transcription factors c-Jun and ATF2 and expression of dominant-negative mutants of c-Jun and ATF2-reduced TNFalpha promoter activity and secretion of TNFalpha. Expression of the nuclear dual-specific MAP kinase phosphatase-1 (MKP-1) blocked TNFalpha promoter activity and TNFalpha secretion following IL-1beta or TPA stimulation, indicating that MKP-1 functions as a nuclear shut-of-device of IL-1beta and TPA-induced TNFalpha expression.
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Affiliation(s)
- Inge Bauer
- Department of Medical Biochemistry and Molecular Biology, University of Saarland Medical Center, D-66421 Homburg, Germany
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Chuderland D, Seger R. Protein-protein interactions in the regulation of the extracellular signal-regulated kinase. Mol Biotechnol 2006; 29:57-74. [PMID: 15668520 DOI: 10.1385/mb:29:1:57] [Citation(s) in RCA: 86] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The extracellular signal-regulated kinase (ERK) cascade is a central intracellular signaling pathway that is activated by a variety of extracellular stimuli, and thereby regulates cellular processes such as proliferation, differentiation, and oncogenic transformation. To execute these functions, the signals of those stimuli are transmitted to the cytosolic and nuclear targets in a rapid and specific manner. In the last few years it has become clear that the specificity and the rapid function of the ERK cascade is largely determined by protein-protein interactions with various signaling components and substrates. This review describes interactions of ERK with its immediate regulators, scaffold proteins, substrates, and localizing proteins, and shows their involvement in the functioning of the ERK cascade. Understanding the full scope of ERK-interactions is important for the development of new drugs for the treatment of cancer and other diseases.
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Affiliation(s)
- Dana Chuderland
- Department of Biological Regulation, The Weizmann Institute of Science, Rehovot 76100, Israel
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50
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Oda K, Kitano H. A comprehensive map of the toll-like receptor signaling network. Mol Syst Biol 2006; 2:2006.0015. [PMID: 16738560 PMCID: PMC1681489 DOI: 10.1038/msb4100057] [Citation(s) in RCA: 242] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2005] [Accepted: 02/23/2006] [Indexed: 12/18/2022] Open
Abstract
Recognition of pathogen-associated molecular signatures is critically important in proper activation of the immune system. The toll-like receptor (TLR) signaling network is responsible for innate immune response. In mammalians, there are 11 TLRs that recognize a variety of ligands from pathogens to trigger immunological responses. In this paper, we present a comprehensive map of TLRs and interleukin 1 receptor signaling networks based on papers published so far. The map illustrates the possible existence of a main network subsystem that has a bow-tie structure in which myeloid differentiation primary response gene 88 (MyD88) is a nonredundant core element, two collateral subsystems with small GTPase and phosphatidylinositol signaling, and MyD88-independent pathway. There is extensive crosstalk between the main bow-tie network and subsystems, as well as feedback and feedforward controls. One obvious feature of this network is the fragility against removal of the nonredundant core element, which is MyD88, and involvement of collateral subsystems for generating different reactions and gene expressions for different stimuli.
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Affiliation(s)
- Kanae Oda
- The Systems Biology Institute, Tokyo, Japan
- Department of Fundamental Science and Technology, Keio University, Tokyo, Japan
| | - Hiroaki Kitano
- The Systems Biology Institute, Tokyo, Japan
- Department of Fundamental Science and Technology, Keio University, Tokyo, Japan
- Sony Computer Science Laboratories Inc., Tokyo, Japan
- The Systems Biology Institute, Suite 6A, M31 6-31-15 Jingumae, Shibuya, Tokyo 150-0001, Japan. Tel.: +81 3 5468 1661; Fax: +81 3 5468 1664; E-mail:
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