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Wang Y, Yu FX. Angiomotin family proteins in the Hippo signaling pathway. Bioessays 2024; 46:e2400076. [PMID: 38760875 DOI: 10.1002/bies.202400076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2024] [Revised: 05/03/2024] [Accepted: 05/08/2024] [Indexed: 05/19/2024]
Abstract
The Motin family proteins (Motins) are a class of scaffolding proteins consisting of Angiomotin (AMOT), AMOT-like protein 1 (AMOTL1), and AMOT-like protein 2 (AMOTL2). Motins play a pivotal role in angiogenesis, tumorigenesis, and neurogenesis by modulating multiple cellular signaling pathways. Recent findings indicate that Motins are components of the Hippo pathway, a signaling cascade involved in development and cancer. This review discusses how Motins are integrated into the Hippo signaling network, as either upstream regulators or downstream effectors, to modulate cell proliferation and migration. The repression of YAP/TAZ by Motins contributes to growth inhibition, whereas subcellular localization of Motins and their interactions with actin fibers are critical in regulating cell migration. The net effect of Motins on cell proliferation and migration may contribute to their diverse biological functions.
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Affiliation(s)
- Yu Wang
- Institute of Pediatrics, Children's Hospital of Fudan University, International Co-laboratory of Medical Epigenetics and Metabolism, State Key Laboratory of Genetic Engineering, Institutes of Biomedical Sciences, Shanghai Medical College, Fudan University, Shanghai, China
| | - Fa-Xing Yu
- Institute of Pediatrics, Children's Hospital of Fudan University, International Co-laboratory of Medical Epigenetics and Metabolism, State Key Laboratory of Genetic Engineering, Institutes of Biomedical Sciences, Shanghai Medical College, Fudan University, Shanghai, China
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Goda N, Ito Y, Saito S, Suzuki M, Bai H, Takahashi M, Wakai T, Kawahara M. Hippo pathway inactivation through subcellular localization of NF2/merlin in outer cells of mouse embryos. Development 2024; 151:dev202639. [PMID: 39077779 DOI: 10.1242/dev.202639] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Accepted: 06/28/2024] [Indexed: 07/31/2024]
Abstract
The Hippo pathway plays a crucial role in cell proliferation and differentiation during tumorigenesis, tissue homeostasis and early embryogenesis. Scaffold proteins from the ezrin-radixin-moesin (ERM) family, including neurofibromin 2 (NF2; Merlin), regulate the Hippo pathway through cell polarity. However, the mechanisms underlying Hippo pathway regulation via cell polarity in establishing outer cells remain unclear. In this study, we generated artificial Nf2 mutants in the N-terminal FERM domain (L64P) and examined Hippo pathway activity by assessing the subcellular localization of YAP1 in early embryos expressing these mutant mRNAs. The L64P-Nf2 mutant inhibited NF2 localization around the cell membrane, resulting in YAP1 cytoplasmic translocation in the polar cells. L64P-Nf2 expression also disrupted the apical centralization of both large tumor suppressor 2 (LATS2) and ezrin in the polar cells. Furthermore, Lats2 mutants in the FERM binding domain (L83K) inhibited YAP1 nuclear translocation. These findings demonstrate that NF2 subcellular localization mediates cell polarity establishment involving ezrin centralization. This study provides previously unreported insights into how the orchestration of the cell-surface components, including NF2, LATS2 and ezrin, modulates the Hippo pathway during cell polarization.
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Affiliation(s)
- Nanami Goda
- Laboratory of Animal Genetics and Reproduction, Research Faculty of Agriculture, Hokkaido University, Sapporo 060-8589, Japan
| | - Yui Ito
- Laboratory of Animal Genetics and Reproduction, Research Faculty of Agriculture, Hokkaido University, Sapporo 060-8589, Japan
| | - Shun Saito
- Laboratory of Animal Genetics and Reproduction, Research Faculty of Agriculture, Hokkaido University, Sapporo 060-8589, Japan
| | - Miyabi Suzuki
- Laboratory of Animal Genetics and Reproduction, Research Faculty of Agriculture, Hokkaido University, Sapporo 060-8589, Japan
| | - Hanako Bai
- Laboratory of Animal Genetics and Reproduction, Research Faculty of Agriculture, Hokkaido University, Sapporo 060-8589, Japan
| | - Masashi Takahashi
- Graduate School of Global Food Resources/Global Center for Food, Land and Water Resources, Hokkaido University, Sapporo, Hokkaido 060-8589, Japan
| | - Takuya Wakai
- Department of Animal Science, Graduate School of Environmental and Life Science, Okayama University, Okayama 700-8530, Japan
| | - Manabu Kawahara
- Laboratory of Animal Genetics and Reproduction, Research Faculty of Agriculture, Hokkaido University, Sapporo 060-8589, Japan
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Lee CJM, Autio MI, Zheng W, Song Y, Wang SC, Wong DCP, Xiao J, Zhu Y, Yusoff P, Yei X, Chock WK, Low BC, Sudol M, Foo RSY. Genome-Wide CRISPR Screen Identifies an NF2-Adherens Junction Mechanistic Dependency for Cardiac Lineage. Circulation 2024; 149:1960-1979. [PMID: 38752370 DOI: 10.1161/circulationaha.122.061335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/19/2022] [Accepted: 04/05/2024] [Indexed: 06/19/2024]
Abstract
BACKGROUND Cardiomyocyte differentiation involves a stepwise clearance of repressors and fate-restricting regulators through the modulation of BMP (bone morphogenic protein)/Wnt-signaling pathways. However, the mechanisms and how regulatory roadblocks are removed with specific developmental signaling pathways remain unclear. METHODS We conducted a genome-wide CRISPR screen to uncover essential regulators of cardiomyocyte specification in human embryonic stem cells using a myosin heavy chain 6 (MYH6)-GFP (green fluorescence protein) reporter system. After an independent secondary single guide ribonucleic acid validation of 25 candidates, we identified NF2 (neurofibromin 2), a moesin-ezrin-radixin like (MERLIN) tumor suppressor, as an upstream driver of early cardiomyocyte lineage specification. Independent monoclonal NF2 knockouts were generated using CRISPR-Cas9, and cell states were inferred through bulk RNA sequencing and protein expression analysis across differentiation time points. Terminal lineage differentiation was assessed by using an in vitro 2-dimensional-micropatterned gastruloid model, trilineage differentiation, and cardiomyocyte differentiation. Protein interaction and post-translation modification of NF2 with its interacting partners were assessed using site-directed mutagenesis, coimmunoprecipitation, and proximity ligation assays. RESULTS Transcriptional regulation and trajectory inference from NF2-null cells reveal the loss of cardiomyocyte identity and the acquisition of nonmesodermal identity. Sustained elevation of early mesoderm lineage repressor SOX2 and upregulation of late anticardiac regulators CDX2 and MSX1 in NF2 knockout cells reflect a necessary role for NF2 in removing regulatory roadblocks. Furthermore, we found that NF2 and AMOT (angiomotin) cooperatively bind to YAP (yes-associated protein) during mesendoderm formation, thereby preventing YAP activation, independent of canonical MST (mammalian sterile 20-like serine-threonine protein kinase)-LATS (large tumor suppressor serine-threonine protein kinase) signaling. Mechanistically, cardiomyocyte lineage identity was rescued by wild-type and NF2 serine-518 phosphomutants, but not NF2 FERM (ezrin-radixin-meosin homology protein) domain blue-box mutants, demonstrating that the critical FERM domain-dependent formation of the AMOT-NF2-YAP scaffold complex at the adherens junction is required for early cardiomyocyte lineage differentiation. CONCLUSIONS These results provide mechanistic insight into the essential role of NF2 during early epithelial-mesenchymal transition by sequestering the repressive effect of YAP and relieving regulatory roadblocks en route to cardiomyocytes.
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Affiliation(s)
- Chang Jie Mick Lee
- Cardiovascular Metabolic Disease Translational Research Programme, National University Health System, Centre for Translational Medicine, Singapore (C.J.M.L., W.H.Z., Y.Z., P.Y., X.Y., R.S.-Y.F.)
- Institute of Molecular and Cell Biology, Singapore (C.J.M.L., Y.Z., R.S.-Y.F.)
| | | | - Wenhao Zheng
- Cardiovascular Metabolic Disease Translational Research Programme, National University Health System, Centre for Translational Medicine, Singapore (C.J.M.L., W.H.Z., Y.Z., P.Y., X.Y., R.S.-Y.F.)
| | - Yoohyun Song
- Mechanobiology Institute Singapore (Y.S., S.C.W., D.C.P.W., J.X., B.C.L.), National University of Singapore
- Institute of Bioengineering and Bioimaging, Agency for Science, Technology and Research (A*STAR), Singapore (Y.S., S.C.W.)
| | - Shyi Chyi Wang
- Mechanobiology Institute Singapore (Y.S., S.C.W., D.C.P.W., J.X., B.C.L.), National University of Singapore
- Institute of Bioengineering and Bioimaging, Agency for Science, Technology and Research (A*STAR), Singapore (Y.S., S.C.W.)
| | - Darren Chen Pei Wong
- Mechanobiology Institute Singapore (Y.S., S.C.W., D.C.P.W., J.X., B.C.L.), National University of Singapore
- Department of Biological Sciences (D.C.P.W., B.C.L.), National University of Singapore
| | - Jingwei Xiao
- Mechanobiology Institute Singapore (Y.S., S.C.W., D.C.P.W., J.X., B.C.L.), National University of Singapore
| | - Yike Zhu
- Cardiovascular Metabolic Disease Translational Research Programme, National University Health System, Centre for Translational Medicine, Singapore (C.J.M.L., W.H.Z., Y.Z., P.Y., X.Y., R.S.-Y.F.)
- Institute of Molecular and Cell Biology, Singapore (C.J.M.L., Y.Z., R.S.-Y.F.)
| | - Permeen Yusoff
- Cardiovascular Metabolic Disease Translational Research Programme, National University Health System, Centre for Translational Medicine, Singapore (C.J.M.L., W.H.Z., Y.Z., P.Y., X.Y., R.S.-Y.F.)
| | - Xi Yei
- Cardiovascular Metabolic Disease Translational Research Programme, National University Health System, Centre for Translational Medicine, Singapore (C.J.M.L., W.H.Z., Y.Z., P.Y., X.Y., R.S.-Y.F.)
| | | | - Boon Chuan Low
- Mechanobiology Institute Singapore (Y.S., S.C.W., D.C.P.W., J.X., B.C.L.), National University of Singapore
- Department of Biological Sciences (D.C.P.W., B.C.L.), National University of Singapore
- University Scholars Programme (B.C.L.), National University of Singapore
| | - Marius Sudol
- Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, New York (M.S.)
| | - Roger S-Y Foo
- Cardiovascular Metabolic Disease Translational Research Programme, National University Health System, Centre for Translational Medicine, Singapore (C.J.M.L., W.H.Z., Y.Z., P.Y., X.Y., R.S.-Y.F.)
- Institute of Molecular and Cell Biology, Singapore (C.J.M.L., Y.Z., R.S.-Y.F.)
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Wu M, Hu L, He L, Yuan L, Yang L, Zhao B, Zhang L, He X. The tumor suppressor NF2 modulates TEAD4 stability and activity in Hippo signaling via direct interaction. J Biol Chem 2024; 300:107212. [PMID: 38522513 PMCID: PMC11046300 DOI: 10.1016/j.jbc.2024.107212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2023] [Revised: 02/10/2024] [Accepted: 03/12/2024] [Indexed: 03/26/2024] Open
Abstract
As an output effector of the Hippo signaling pathway, the TEAD transcription factor and co-activator YAP play crucial functions in promoting cell proliferation and organ size. The tumor suppressor NF2 has been shown to activate LATS1/2 kinases and interplay with the Hippo pathway to suppress the YAP-TEAD complex. However, whether and how NF2 could directly regulate TEAD remains unknown. We identified a direct link and physical interaction between NF2 and TEAD4. NF2 interacted with TEAD4 through its FERM domain and C-terminal tail and decreased the protein stability of TEAD4 independently of LATS1/2 and YAP. Furthermore, NF2 inhibited TEAD4 palmitoylation and induced the cytoplasmic translocation of TEAD4, resulting in ubiquitination and dysfunction of TEAD4. Moreover, the interaction with TEAD4 is required for NF2 function to suppress cell proliferation. These findings reveal an unanticipated role of NF2 as a binding partner and inhibitor of the transcription factor TEAD, shedding light on an alternative mechanism of how NF2 functions as a tumor suppressor through the Hippo signaling cascade.
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Affiliation(s)
- Mengying Wu
- Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, China
| | - Liqiao Hu
- Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, China.
| | - Lingli He
- State Key Laboratory of Cell Biology, Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China
| | - Liang Yuan
- College of Life Science and Technology, ShanghaiTech University, Shanghai, China
| | - Lingling Yang
- Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, China
| | - Bin Zhao
- The MOE Key Laboratory of Biosystems Homeostasis and Protection and Innovation Center for Cell Signaling Network, Life Sciences Institute, Zhejiang University, Hangzhou, Zhejiang, China; Cancer Center, Zhejiang University, Hangzhou, Zhejiang, China
| | - Lei Zhang
- State Key Laboratory of Cell Biology, Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China; College of Life Science and Technology, ShanghaiTech University, Shanghai, China; School of Life Science, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Hangzhou, China
| | - Xiaojing He
- Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, China.
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Zhang C, Ge L, Xie H, Liu X, Xun C, Chen Y, Chen H, Lu M, Chen P. Retinoic acid induced specific changes in the phosphoproteome of C17.2 neural stem cells. J Cell Mol Med 2024; 28:e18205. [PMID: 38506089 PMCID: PMC10951872 DOI: 10.1111/jcmm.18205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2023] [Revised: 01/16/2024] [Accepted: 02/20/2024] [Indexed: 03/21/2024] Open
Abstract
Retinoic acid (RA), a vitamin A derivative, is an effective cell differentiating factor which plays critical roles in neuronal differentiation induction and the production of neurotransmitters in neurons. However, the specific changes in phosphorylation levels and downstream signalling pathways associated with RA remain unclear. This study employed qualitative and quantitative phosphoproteomics approaches based on mass spectrometry to investigate the phosphorylation changes induced by RA in C17.2 neural stem cells (NSCs). Dimethyl labelling, in conjunction with TiO2 phosphopeptide enrichment, was utilized to profile the phosphoproteome of self-renewing and RA-induced differentiated cells in C17.2 NSCs. The results of our study revealed that, qualitatively, 230 and 14 phosphoproteins were exclusively identified in the self-renewal and RA-induced groups respectively. Quantitatively, we successfully identified and quantified 177 unique phosphoproteins, among which 70 exhibited differential phosphorylation levels. Analysis of conserved phosphorylation motifs demonstrated enrichment of motifs corresponding to cyclin-dependent kinase and MAPK in the RA-induced group. Additionally, through a comprehensive literature and database survey, we found that the differentially expressed proteins were associated with the Wnt/β-catenin and Hippo signalling pathways. This work sheds light on the changes in phosphorylation levels induced by RA in C17.2 NSCs, thereby expanding our understanding of the molecular mechanisms underlying RA-induced neuronal differentiation.
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Affiliation(s)
- Cheng Zhang
- The National & Local Joint Engineering Laboratory of Animal Peptide Drug Development, College of Life SciencesHunan Normal UniversityChangshaPR China
- Guangdong Provincial Key Laboratory of Biotechnology for Plant Development, School of Life ScienceSouth China Normal UniversityGuangzhouPR China
| | - Lite Ge
- The National & Local Joint Engineering Laboratory of Animal Peptide Drug Development, College of Life SciencesHunan Normal UniversityChangshaPR China
- Hunan Provincial Key Laboratory of Neurorestoratology, the Second Affiliated HospitalHunan Normal UniversityChangshaPR China
- Department of Neurology, Second Xiangya HospitalCentral South UniversityChangshaPR China
| | - Huali Xie
- The National & Local Joint Engineering Laboratory of Animal Peptide Drug Development, College of Life SciencesHunan Normal UniversityChangshaPR China
| | - Xiaoqian Liu
- The National & Local Joint Engineering Laboratory of Animal Peptide Drug Development, College of Life SciencesHunan Normal UniversityChangshaPR China
| | - Chengfeng Xun
- The National & Local Joint Engineering Laboratory of Animal Peptide Drug Development, College of Life SciencesHunan Normal UniversityChangshaPR China
| | - Yan Chen
- The National & Local Joint Engineering Laboratory of Animal Peptide Drug Development, College of Life SciencesHunan Normal UniversityChangshaPR China
| | - Haiyan Chen
- The National & Local Joint Engineering Laboratory of Animal Peptide Drug Development, College of Life SciencesHunan Normal UniversityChangshaPR China
| | - Ming Lu
- The National & Local Joint Engineering Laboratory of Animal Peptide Drug Development, College of Life SciencesHunan Normal UniversityChangshaPR China
- Department of Neurology, Second Xiangya HospitalCentral South UniversityChangshaPR China
| | - Ping Chen
- The National & Local Joint Engineering Laboratory of Animal Peptide Drug Development, College of Life SciencesHunan Normal UniversityChangshaPR China
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Borkúti P, Kristó I, Szabó A, Kovács Z, Vilmos P. FERM domain-containing proteins are active components of the cell nucleus. Life Sci Alliance 2024; 7:e202302489. [PMID: 38296350 PMCID: PMC10830384 DOI: 10.26508/lsa.202302489] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2023] [Revised: 01/20/2024] [Accepted: 01/22/2024] [Indexed: 02/05/2024] Open
Abstract
The FERM domain is a conserved and widespread protein module that appeared in the common ancestor of amoebae, fungi, and animals, and is therefore now found in a wide variety of species. The primary function of the FERM domain is localizing to the plasma membrane through binding lipids and proteins of the membrane; thus, for a long time, FERM domain-containing proteins (FDCPs) were considered exclusively cytoskeletal. Although their role in the cytoplasm has been extensively studied, the recent discovery of the presence and importance of cytoskeletal proteins in the nucleus suggests that FDCPs might also play an important role in nuclear function. In this review, we collected data on their nuclear localization, transport, and possible functions, which are still scattered throughout the literature, with special regard to the role of the FERM domain in these processes. With this, we would like to draw attention to the exciting, new dimension of the role of FDCPs, their nuclear activity, which could be an interesting novel direction for future research.
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Affiliation(s)
| | | | - Anikó Szabó
- HUN-REN Biological Research Centre, Szeged, Hungary
| | - Zoltán Kovács
- HUN-REN Biological Research Centre, Szeged, Hungary
- Doctoral School of Multidisciplinary Medical Science, University of Szeged, Szeged, Hungary
| | - Péter Vilmos
- HUN-REN Biological Research Centre, Szeged, Hungary
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Fang W, Xie S, Deng W. Ferroptosis mechanisms and regulations in cardiovascular diseases in the past, present, and future. Cell Biol Toxicol 2024; 40:17. [PMID: 38509409 PMCID: PMC10955039 DOI: 10.1007/s10565-024-09853-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Accepted: 02/27/2024] [Indexed: 03/22/2024]
Abstract
Cardiovascular diseases (CVDs) are the main diseases that endanger human health, and their risk factors contribute to high morbidity and a high rate of hospitalization. Cell death is the most important pathophysiology in CVDs. As one of the cell death mechanisms, ferroptosis is a new form of regulated cell death (RCD) that broadly participates in CVDs (such as myocardial infarction, heart transplantation, atherosclerosis, heart failure, ischaemia/reperfusion (I/R) injury, atrial fibrillation, cardiomyopathy (radiation-induced cardiomyopathy, diabetes cardiomyopathy, sepsis-induced cardiac injury, doxorubicin-induced cardiac injury, iron overload cardiomyopathy, and hypertrophic cardiomyopathy), and pulmonary arterial hypertension), involving in iron regulation, metabolic mechanism and lipid peroxidation. This article reviews recent research on the mechanism and regulation of ferroptosis and its relationship with the occurrence and treatment of CVDs, aiming to provide new ideas and treatment targets for the clinical diagnosis and treatment of CVDs by clarifying the latest progress in CVDs research.
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Affiliation(s)
- Wenxi Fang
- Department of Cardiology, Renmin Hospital of Wuhan University, Jiefang Road 238, Wuhan, 430060, People's Republic of China
- Hubei Key Laboratory of Metabolic and Chronic Diseases, Wuhan, 430060, People's Republic of China
| | - Saiyang Xie
- Department of Cardiology, Renmin Hospital of Wuhan University, Jiefang Road 238, Wuhan, 430060, People's Republic of China
- Hubei Key Laboratory of Metabolic and Chronic Diseases, Wuhan, 430060, People's Republic of China
| | - Wei Deng
- Department of Cardiology, Renmin Hospital of Wuhan University, Jiefang Road 238, Wuhan, 430060, People's Republic of China.
- Hubei Key Laboratory of Metabolic and Chronic Diseases, Wuhan, 430060, People's Republic of China.
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Ma N, Wibowo YC, Wirtz P, Baltus D, Wieland T, Jansen S. Tankyrase inhibition interferes with junction remodeling, induces leakiness, and disturbs YAP1/TAZ signaling in the endothelium. NAUNYN-SCHMIEDEBERG'S ARCHIVES OF PHARMACOLOGY 2024; 397:1763-1789. [PMID: 37741944 PMCID: PMC10858845 DOI: 10.1007/s00210-023-02720-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2023] [Accepted: 09/12/2023] [Indexed: 09/25/2023]
Abstract
Tankyrase inhibitors are increasingly considered for therapeutic use in malignancies that are characterized by high intrinsic β-catenin activity. However, how tankyrase inhibition affects the endothelium after systemic application remains poorly understood. In this study, we aimed to investigate how the tankyrase inhibitor XAV939 affects endothelial cell function and the underlying mechanism involved. Endothelial cell function was analyzed using sprouting angiogenesis, endothelial cell migration, junctional dynamics, and permeability using human umbilical vein endothelial cells (HUVEC) and explanted mouse retina. Underlying signaling was studied using western blot, immunofluorescence, and qPCR in HUVEC in addition to luciferase reporter gene assays in human embryonic kidney cells. XAV939 treatment leads to altered junctional dynamics and permeability as well as impaired endothelial migration. Mechanistically, XAV939 increased stability of the angiomotin-like proteins 1 and 2, which impedes the nuclear translocation of YAP1/TAZ and consequently suppresses TEAD-mediated transcription. Intriguingly, XAV939 disrupts adherens junctions by inducing RhoA-Rho dependent kinase (ROCK)-mediated F-actin bundling, whereas disruption of F-actin bundling through the ROCK inhibitor H1152 restores endothelial cell function. Unexpectedly, this was accompanied by an increase in nuclear TAZ and TEAD-mediated transcription, suggesting differential regulation of YAP1 and TAZ by the actin cytoskeleton in endothelial cells. In conclusion, our findings elucidate the complex relationship between the actin cytoskeleton, YAP1/TAZ signaling, and endothelial cell function and how tankyrase inhibition disturbs this well-balanced signaling.
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Affiliation(s)
- Nan Ma
- Experimental Pharmacology Mannheim, European Center for Angioscience (ECAS), Mannheim Medical Faculty, Heidelberg University, Mannheim, Germany
| | - Yohanes Cakrapradipta Wibowo
- Experimental Pharmacology Mannheim, European Center for Angioscience (ECAS), Mannheim Medical Faculty, Heidelberg University, Mannheim, Germany
| | - Phillip Wirtz
- Experimental Pharmacology Mannheim, European Center for Angioscience (ECAS), Mannheim Medical Faculty, Heidelberg University, Mannheim, Germany
| | - Doris Baltus
- Experimental Pharmacology Mannheim, European Center for Angioscience (ECAS), Mannheim Medical Faculty, Heidelberg University, Mannheim, Germany
| | - Thomas Wieland
- Experimental Pharmacology Mannheim, European Center for Angioscience (ECAS), Mannheim Medical Faculty, Heidelberg University, Mannheim, Germany.
- DZHK, German Center for Cardiovascular Research, partner site Heidelberg/Mannheim, Mannheim, Germany.
| | - Sepp Jansen
- Experimental Pharmacology Mannheim, European Center for Angioscience (ECAS), Mannheim Medical Faculty, Heidelberg University, Mannheim, Germany
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Pipchuk A, Kelly T, Carew M, Nicol C, Yang X. Development of Novel Bioluminescent Biosensors Monitoring the Conformation and Activity of the Merlin Tumour Suppressor. Int J Mol Sci 2024; 25:1527. [PMID: 38338806 PMCID: PMC10855677 DOI: 10.3390/ijms25031527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2023] [Revised: 01/23/2024] [Accepted: 01/24/2024] [Indexed: 02/12/2024] Open
Abstract
Solid tumours can universally evade contact inhibition of proliferation (CIP), a mechanism halting cell proliferation when cell-cell contact occurs. Merlin, an ERM-like protein, crucially regulates CIP and is frequently deactivated in various cancers, indicating its significance as a tumour suppressor in cancer biology. Despite extensive investigations into Merlin's role in cancer, its lack of intrinsic catalytic activity and frequent conformation changes have made it notoriously challenging to study. To address this challenge, we harnessed innovative luciferase technologies to create and validate a NanoBiT split-luciferase biosensor system in which Merlin is cloned between two split components (LgBiT and SmBiT) of NanoLuc luciferase. This system enables precise quantification of Merlin's conformation and activity both in vitro and within living cells. This biosensor significantly enhances the study of Merlin's molecular functions, serving as a potent tool for exploring its contributions to CIP and tumorigenesis.
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Affiliation(s)
| | | | | | | | - Xiaolong Yang
- Department of Pathology and Molecular Medicine, Queen’s University, Kingston, ON K7L 3N6, Canada; (A.P.); (T.K.); (M.C.); (C.N.)
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10
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Guo S, Zheng X, Chen W, Raza U, Zeng A, Akter F, Huang Q, Yao S. From bench to bedside: Advancing towards therapeutic treatment of vestibular schwannomas. Neurooncol Adv 2024; 6:vdae107. [PMID: 39022647 PMCID: PMC11252569 DOI: 10.1093/noajnl/vdae107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/20/2024] Open
Abstract
Vestibular schwannomas are rare intracranial tumors originating from Schwann cells of the vestibular nerve. Despite their benign nature, these tumors can exert significant mass effects and debilitating symptoms, including gradual hearing loss, vertigo, facial nerve dysfunction, and headaches. Current clinical management options encompass wait-and-scan, surgery, radiation therapy, and off-label medication. However, each approach exhibits its own challenges and harbors limitations that underscore the urgent need for therapeutic treatments. Over the past 2 decades, extensive elucidation of the molecular underpinnings of vestibular schwannomas has unraveled genetic anomalies, dysregulated signaling pathways, downstream of receptor tyrosine kinases, disrupted extracellular matrix, inflammatory tumor microenvironment, and altered cerebrospinal fluid composition as integral factors in driving the development and progression of the disease. Armed with this knowledge, novel therapeutic interventions tailored to the unique molecular characteristics of those conditions are actively being pursued. This review underscores the urgency of addressing the dearth of Food and Drug Administration-approved drugs for vestibular schwannoma, highlighting the key molecular discoveries and their potential translation into therapeutics. It provides an in-depth exploration of the evolving landscape of therapeutic development, which is currently advancing from bench to bedside. These ongoing efforts hold the promise of significantly transforming the lives of vestibular schwannoma patients in the future.
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Affiliation(s)
- Shaolei Guo
- Department of Neurosurgery, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Xuan Zheng
- Department of Neurosurgery, The Sixth Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Wenli Chen
- Department of Neurosurgery, The Sixth Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Umar Raza
- School of Basic Medical Sciences, Shenzhen University, Shenzhen, China
| | - Ailiang Zeng
- Department of Cancer Biology, UT MD Anderson Cancer Center, Houston, Texas, USA
| | - Farhana Akter
- Faculty of Arts and Sciences, Harvard University, Cambridge, Massachusetts, USA
| | - Quan Huang
- Department of Neurosurgery, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Shun Yao
- Department of Neurosurgery, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
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Shen X, Li Q, Sun Y, Chen L, Xue F, Tian W, Wang Y. The Hippo pathway in endometrial cancer: a potential therapeutic target? Front Oncol 2023; 13:1273345. [PMID: 37927473 PMCID: PMC10625429 DOI: 10.3389/fonc.2023.1273345] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2023] [Accepted: 10/09/2023] [Indexed: 11/07/2023] Open
Abstract
Endometrial cancer, one of the most prevalent malignant cancers tumors of the female reproductive tract, has been increasing in incidence and mortality rates around the world. The Hippo pathway, one of the eight traditional human cancer signaling pathways, is an intricate signaling network that regulates cell proliferation, differentiation, and migration as well as restricting organ size in response to a range of intracellular and extracellular signals. Inhibiting the Hippo pathway results in aberrant activation of its downstream core component YAP/TAZ, which can enhance cancer cells' metabolism and maintain their stemness. Additionally, the Hippo pathway can modulate the tumor microenvironment and induce drug resistance, where tumorigenesis and tumor progression occur. However, the Hippo pathway has been little researched in endometrial cancer. Here, we aim to review how the Hippo pathway contributes to the onset, development and the potential treatment of endometrial cancer with the aim of providing new therapeutic targets.
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Affiliation(s)
- Xinyun Shen
- Department of Gynecology and Obstetrics, Tianjin Medical University General Hospital, Tianjin, China
- Tianjin Key Laboratory of Female Reproductive Health and Eugenics, Tianjin Medical University General Hospital, Tianjin, China
| | - Qianqian Li
- Department of Gynecology and Obstetrics, Tianjin Medical University General Hospital, Tianjin, China
- Tianjin Key Laboratory of Female Reproductive Health and Eugenics, Tianjin Medical University General Hospital, Tianjin, China
| | - Yiqing Sun
- Department of Gynecology and Obstetrics, Tianjin Medical University General Hospital, Tianjin, China
- Tianjin Key Laboratory of Female Reproductive Health and Eugenics, Tianjin Medical University General Hospital, Tianjin, China
| | - Lingli Chen
- Department of Gynecology and Obstetrics, Tianjin Medical University General Hospital, Tianjin, China
- Tianjin Key Laboratory of Female Reproductive Health and Eugenics, Tianjin Medical University General Hospital, Tianjin, China
| | - Fengxia Xue
- Department of Gynecology and Obstetrics, Tianjin Medical University General Hospital, Tianjin, China
- Tianjin Key Laboratory of Female Reproductive Health and Eugenics, Tianjin Medical University General Hospital, Tianjin, China
| | - Wenyan Tian
- Department of Gynecology and Obstetrics, Tianjin Medical University General Hospital, Tianjin, China
- Tianjin Key Laboratory of Female Reproductive Health and Eugenics, Tianjin Medical University General Hospital, Tianjin, China
| | - Yingmei Wang
- Department of Gynecology and Obstetrics, Tianjin Medical University General Hospital, Tianjin, China
- Tianjin Key Laboratory of Female Reproductive Health and Eugenics, Tianjin Medical University General Hospital, Tianjin, China
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12
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Le DDT, Le TPH, Lee SY. PIP5Kγ Mediates PI(4,5)P2/Merlin/LATS1 Signaling Activation and Interplays with Hsc70 in Hippo-YAP Pathway Regulation. Int J Mol Sci 2023; 24:14786. [PMID: 37834234 PMCID: PMC10572892 DOI: 10.3390/ijms241914786] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 09/27/2023] [Accepted: 09/27/2023] [Indexed: 10/15/2023] Open
Abstract
The type I phosphatidylinositol 4-phosphate 5-kinase (PIP5K) family produces the critical lipid regulator phosphatidylinositol 4,5-bisphosphate (PI(4,5)P2) in the plasma membrane (PM). Here, we investigated the potential role of PIP5Kγ, a PIP5K isoform, in the Hippo pathway. The ectopic expression of PIP5Kγ87 or PIP5Kγ90, two major PIP5Kγ splice variants, activated large tumor suppressor kinase 1 (LATS1) and inhibited Yes-associated protein (YAP), whereas PIP5Kγ knockdown yielded opposite effects. The regulatory effects of PIP5Kγ were dependent on its catalytic activity and the presence of Merlin and LATS1. PIP5Kγ knockdown weakened the restoration of YAP phosphorylation upon stimulation with epidermal growth factor or lysophosphatidic acid. We further found that PIP5Kγ90 bound to the Merlin's band 4.1/ezrin/radixin/moesin (FERM) domain, forming a complex with PI(4,5)P2 and LATS1 at the PM. Notably, PIP5Kγ90, but not its kinase-deficient mutant, potentiated Merlin-LATS1 interaction and recruited LATS1 to the PM. Consistently, PIP5Kγ knockdown or inhibitor (UNC3230) enhanced colony formation in carcinoma cell lines YAP-dependently. In addition, PIP5Kγ90 interacted with heat shock cognate 71-kDa protein (Hsc70), which also contributed to Hippo pathway activation. Collectively, our results suggest that PIP5Kγ regulates the Hippo-YAP pathway by forming a functional complex with Merlin and LATS1 at the PI(4,5)P2-rich PM and via interplay with Hsc70.
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Affiliation(s)
- Duong Duy Thai Le
- Department of Biomedical Sciences, Ajou University Graduate School of Medicine, Suwon 16499, Gyeonggi-do, Republic of Korea; (D.D.T.L.); (T.P.H.L.)
| | - Truc Phan Hoang Le
- Department of Biomedical Sciences, Ajou University Graduate School of Medicine, Suwon 16499, Gyeonggi-do, Republic of Korea; (D.D.T.L.); (T.P.H.L.)
| | - Sang Yoon Lee
- Department of Biomedical Sciences, Ajou University Graduate School of Medicine, Suwon 16499, Gyeonggi-do, Republic of Korea; (D.D.T.L.); (T.P.H.L.)
- Institute of Medical Science, Ajou University School of Medicine, Suwon 16499, Gyeonggi-do, Republic of Korea
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13
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Moesslacher CS, Auernig E, Woodsmith J, Feichtner A, Jany-Luig E, Jehle S, Worseck JM, Heine CL, Stefan E, Stelzl U. Missense variant interaction scanning reveals a critical role of the FERM domain for tumor suppressor protein NF2 conformation and function. Life Sci Alliance 2023; 6:e202302043. [PMID: 37280085 PMCID: PMC10244618 DOI: 10.26508/lsa.202302043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Revised: 05/24/2023] [Accepted: 05/24/2023] [Indexed: 06/08/2023] Open
Abstract
NF2 (moesin-ezrin-radixin-like [MERLIN] tumor suppressor) is frequently inactivated in cancer, where its NF2 tumor suppressor functionality is tightly coupled to protein conformation. How NF2 conformation is regulated and how NF2 conformation influences tumor suppressor activity is a largely open question. Here, we systematically characterized three NF2 conformation-dependent protein interactions utilizing deep mutational scanning interaction perturbation analyses. We identified two regions in NF2 with clustered mutations which affected conformation-dependent protein interactions. NF2 variants in the F2-F3 subdomain and the α3H helix region substantially modulated NF2 conformation and homomerization. Mutations in the F2-F3 subdomain altered proliferation in three cell lines and matched patterns of disease mutations in NF2 related-schwannomatosis. This study highlights the power of systematic mutational interaction perturbation analysis to identify missense variants impacting NF2 conformation and provides insight into NF2 tumor suppressor function.
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Affiliation(s)
- Christina S Moesslacher
- Institute of Pharmaceutical Sciences, Pharmaceutical Chemistry, University of Graz, Graz, Austria
| | - Elisabeth Auernig
- Institute of Pharmaceutical Sciences, Pharmaceutical Chemistry, University of Graz, Graz, Austria
| | - Jonathan Woodsmith
- Institute of Pharmaceutical Sciences, Pharmaceutical Chemistry, University of Graz, Graz, Austria
| | - Andreas Feichtner
- Institute of Biochemistry and Center for Molecular Biosciences, University of Innsbruck, Innsbruck, Austria
| | - Evelyne Jany-Luig
- Institute of Pharmaceutical Sciences, Pharmaceutical Chemistry, University of Graz, Graz, Austria
| | - Stefanie Jehle
- Max-Planck Institute for Molecular Genetics (MPIMG), Otto-Warburg-Laboratory, Berlin, Germany
| | - Josephine M Worseck
- Max-Planck Institute for Molecular Genetics (MPIMG), Otto-Warburg-Laboratory, Berlin, Germany
| | - Christian L Heine
- Institute of Pharmaceutical Sciences, Pharmaceutical Chemistry, University of Graz, Graz, Austria
| | - Eduard Stefan
- Institute of Biochemistry and Center for Molecular Biosciences, University of Innsbruck, Innsbruck, Austria
- Tyrolean Cancer Research Institute (TKFI), Innsbruck, Austria
- Institute of Molecular Biology, Innsbruck, Austria
| | - Ulrich Stelzl
- Institute of Pharmaceutical Sciences, Pharmaceutical Chemistry, University of Graz, Graz, Austria
- Max-Planck Institute for Molecular Genetics (MPIMG), Otto-Warburg-Laboratory, Berlin, Germany
- BioTechMed-Graz, Graz, Austria
- Field of Excellence BioHealth - University of Graz, Graz, Austria
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14
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Mokhtari RB, Ashayeri N, Baghaie L, Sambi M, Satari K, Baluch N, Bosykh DA, Szewczuk MR, Chakraborty S. The Hippo Pathway Effectors YAP/TAZ-TEAD Oncoproteins as Emerging Therapeutic Targets in the Tumor Microenvironment. Cancers (Basel) 2023; 15:3468. [PMID: 37444578 DOI: 10.3390/cancers15133468] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Revised: 06/21/2023] [Accepted: 06/26/2023] [Indexed: 07/15/2023] Open
Abstract
Various cancer cell-associated intrinsic and extrinsic inputs act on YAP/TAZ proteins to mediate the hyperactivation of the TEAD transcription factor-based transcriptome. This YAP/TAZ-TEAD activity can override the growth-limiting Hippo tumor-suppressor pathway that maintains normal tissue homeostasis. Herein, we provide an integrated summary of the contrasting roles of YAP/TAZ during normal tissue homeostasis versus tumor initiation and progression. In addition to upstream factors that regulate YAP/TAZ in the TME, critical insights on the emerging functions of YAP/TAZ in immune suppression and abnormal vasculature development during tumorigenesis are illustrated. Lastly, we discuss the current methods that intervene with the YAP/TAZ-TEAD oncogenic signaling pathway and the emerging applications of combination therapies, gut microbiota, and epigenetic plasticity that could potentiate the efficacy of chemo/immunotherapy as improved cancer therapeutic strategies.
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Affiliation(s)
- Reza Bayat Mokhtari
- Department of Pharmacology and Therapeutics, Roswell Park Comprehensive Cancer Center, Buffalo, NY 14263, USA
- Department of Biomedical and Molecular Sciences, Queen's University, Kingston, ON K7L 3N6, Canada
| | - Neda Ashayeri
- Division of Hematology and Oncology, Department of Pediatrics, Ali-Asghar Children Hospital, Iran University of Medical Science, Tehran 1449614535, Iran
| | - Leili Baghaie
- Department of Biomedical and Molecular Sciences, Queen's University, Kingston, ON K7L 3N6, Canada
| | - Manpreet Sambi
- Department of Biomedical and Molecular Sciences, Queen's University, Kingston, ON K7L 3N6, Canada
| | - Kosar Satari
- Division of Hematology and Oncology, Department of Pediatrics, Ali-Asghar Children Hospital, Iran University of Medical Science, Tehran 1449614535, Iran
| | - Narges Baluch
- Department of Immunology and Allergy, The Hospital for Sick Children, Toronto, ON M5G 0A4, Canada
| | - Dmitriy A Bosykh
- Department of Pharmacology and Therapeutics, Roswell Park Comprehensive Cancer Center, Buffalo, NY 14263, USA
| | - Myron R Szewczuk
- Department of Biomedical and Molecular Sciences, Queen's University, Kingston, ON K7L 3N6, Canada
| | - Sayan Chakraborty
- Department of Pharmacology and Therapeutics, Roswell Park Comprehensive Cancer Center, Buffalo, NY 14263, USA
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15
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Subramani A, Cui W, Zhang Y, Friman T, Zhao Z, Huang W, Fonseca P, Lui WO, Narayanan V, Bobrowska J, Lekka M, Yan J, Conway DE, Holmgren L. Modulation of E-Cadherin Function through the AmotL2 Isoforms Promotes Ameboid Cell Invasion. Cells 2023; 12:1682. [PMID: 37443716 PMCID: PMC10340588 DOI: 10.3390/cells12131682] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Revised: 06/08/2023] [Accepted: 06/09/2023] [Indexed: 07/15/2023] Open
Abstract
The spread of tumor cells and the formation of distant metastasis remain the main causes of mortality in cancer patients. However, the mechanisms governing the release of cells from micro-environmental constraints remain unclear. E-cadherin negatively controls the invasion of epithelial cells by maintaining cell-cell contacts. Furthermore, the inactivation of E-cadherin triggers invasion in vitro. However, the role of E-cadherin is complex, as metastasizing cells maintain E-cadherin expression, which appears to have a positive role in the survival of tumor cells. In this report, we present a novel mechanism delineating how E-cadherin function is modulated to promote invasion. We have previously shown that E-cadherin is associated with p100AmotL2, which is required for radial actin formation and the transmission of mechanical force. Here, we present evidence that p60AmotL2, which is expressed in invading tumor cells, binds to the p100AmotL2 isoform and uncouples the mechanical constraint of radial actin filaments. We show for the first time that the coupling of E-cadherin to the actin cytoskeleton via p100AmotL2 is directly connected to the nuclear membrane. The expression of p60AmotL2 inactivates this connection and alters the properties of the nuclear lamina, potentiating the invasion of cells into micropores of the extracellular matrix. In summary, we propose that the balance of the two AmotL2 isoforms is important in the modulation of E-cadherin function and that an imbalance of this axis promotes ameboid cell invasion.
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Affiliation(s)
- Aravindh Subramani
- Department of Oncology and Pathology, U2, Bioclinicum J6:20, Solnavägen 30 Karolinska Institutet, Solna, 171 64 Stockholm, Sweden; (A.S.); (W.C.); (Y.Z.); (T.F.); (P.F.); (W.-O.L.)
| | - Weiyingqi Cui
- Department of Oncology and Pathology, U2, Bioclinicum J6:20, Solnavägen 30 Karolinska Institutet, Solna, 171 64 Stockholm, Sweden; (A.S.); (W.C.); (Y.Z.); (T.F.); (P.F.); (W.-O.L.)
| | - Yuanyuan Zhang
- Department of Oncology and Pathology, U2, Bioclinicum J6:20, Solnavägen 30 Karolinska Institutet, Solna, 171 64 Stockholm, Sweden; (A.S.); (W.C.); (Y.Z.); (T.F.); (P.F.); (W.-O.L.)
| | - Tomas Friman
- Department of Oncology and Pathology, U2, Bioclinicum J6:20, Solnavägen 30 Karolinska Institutet, Solna, 171 64 Stockholm, Sweden; (A.S.); (W.C.); (Y.Z.); (T.F.); (P.F.); (W.-O.L.)
| | - Zhihai Zhao
- Department of Physics, Faculty of Science: 2 Science Drive 3, S7-01-10, Lower Kent Ridge Road, Singapore 117542, Singapore; (Z.Z.); (W.H.); (J.Y.)
- Mechanobiology Institute (MBI): T-Lab, #10-02, 5A Engineering Drive 1, National University of Singapore, Singapore 117411, Singapore
| | - Wenmao Huang
- Department of Physics, Faculty of Science: 2 Science Drive 3, S7-01-10, Lower Kent Ridge Road, Singapore 117542, Singapore; (Z.Z.); (W.H.); (J.Y.)
- Mechanobiology Institute (MBI): T-Lab, #10-02, 5A Engineering Drive 1, National University of Singapore, Singapore 117411, Singapore
| | - Pedro Fonseca
- Department of Oncology and Pathology, U2, Bioclinicum J6:20, Solnavägen 30 Karolinska Institutet, Solna, 171 64 Stockholm, Sweden; (A.S.); (W.C.); (Y.Z.); (T.F.); (P.F.); (W.-O.L.)
| | - Weng-Onn Lui
- Department of Oncology and Pathology, U2, Bioclinicum J6:20, Solnavägen 30 Karolinska Institutet, Solna, 171 64 Stockholm, Sweden; (A.S.); (W.C.); (Y.Z.); (T.F.); (P.F.); (W.-O.L.)
| | - Vani Narayanan
- Department of Biomedical Engineering, Virginia Commonwealth University, 401 West Main Street, Richmond, VA 23284, USA; (V.N.); (D.E.C.)
| | - Justyna Bobrowska
- Institute of Nuclear Physics, Polish Academy of Sciences, PL-31342 Krakow, Poland; (J.B.); (M.L.)
| | - Małgorzata Lekka
- Institute of Nuclear Physics, Polish Academy of Sciences, PL-31342 Krakow, Poland; (J.B.); (M.L.)
| | - Jie Yan
- Department of Physics, Faculty of Science: 2 Science Drive 3, S7-01-10, Lower Kent Ridge Road, Singapore 117542, Singapore; (Z.Z.); (W.H.); (J.Y.)
- Mechanobiology Institute (MBI): T-Lab, #10-02, 5A Engineering Drive 1, National University of Singapore, Singapore 117411, Singapore
| | - Daniel E. Conway
- Department of Biomedical Engineering, Virginia Commonwealth University, 401 West Main Street, Richmond, VA 23284, USA; (V.N.); (D.E.C.)
| | - Lars Holmgren
- Department of Oncology and Pathology, U2, Bioclinicum J6:20, Solnavägen 30 Karolinska Institutet, Solna, 171 64 Stockholm, Sweden; (A.S.); (W.C.); (Y.Z.); (T.F.); (P.F.); (W.-O.L.)
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16
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Le TPH, Nguyen NTT, Le DDT, Anwar MA, Lee SY. Lipid kinase PIP5Kα contributes to Hippo pathway activation via interaction with Merlin and by mediating plasma membrane targeting of LATS1. Cell Commun Signal 2023; 21:149. [PMID: 37337213 DOI: 10.1186/s12964-023-01161-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Accepted: 05/07/2023] [Indexed: 06/21/2023] Open
Abstract
BACKGROUND The Hippo pathway plays a critical role in controlled cell proliferation. The tumor suppressor Merlin and large tumor suppressor kinase 1 (LATS1) mediate activation of Hippo pathway, consequently inhibiting the primary effectors, Yes-associated protein (YAP) and transcriptional coactivator with PDZ-binding motif (TAZ). Phosphatidylinositol 4,5-bisphosphate (PIP2), a lipid present in the plasma membrane (PM), binds to and activates Merlin. Phosphatidylinositol 4-phosphate 5-kinase α (PIP5Kα) is an enzyme responsible for PIP2 production. However, the functional role of PIP5Kα in regulation of Merlin and LATS1 under Hippo signaling conditions remains unclear. METHODS PIP5Kα, Merlin, or LATS1 knockout or knockdown cells and transfected cells with them were used. LATS1, YAP, and TAZ activities were measured using biochemical methods and PIP2 levels were evaluated using cell imaging. Low/high cell density and serum starvation/stimulation conditions were tested. Colocalization of PIP5Kα and PIP2 with Merlin and LATS1, and their protein interactions were examined using transfection, confocal imaging, immunoprecipitation, western blotting, and/or pull-down experiments. Colony formation and adipocyte differentiation assays were performed. RESULTS We found that PIP5Kα induced LATS1 activation and YAP/TAZ inhibition in a kinase activity-dependent manner. Consistent with these findings, PIP5Kα suppressed cell proliferation and enhanced adipocyte differentiation of mesenchymal stem cells. Moreover, PIP5Kα protein stability and PIP2 levels were elevated at high cell density compared with those at low cell density, and both PIP2 and YAP phosphorylation levels initially declined, then recovered upon serum stimulation. Under these conditions, YAP/TAZ activity was aberrantly regulated by PIP5Kα deficiency. Mechanistically, either Merlin deficiency or LATS1 deficiency abrogated PIP5Kα-mediated YAP/TAZ inactivation. Additionally, the catalytic domain of PIP5Kα directly interacted with the band 4.1/ezrin/radixin/moesin domain of Merlin, and this interaction reinforced interaction of Merlin with LATS1. In accordance with these findings, PIP5Kα and PIP2 colocalized with Merlin and LATS1 in the PM. In PIP5Kα-deficient cells, Merlin colocalization with PIP2 was reduced, and LATS1 solubility increased. CONCLUSIONS Collectively, our results support that PIP5Kα serves as an activator of the Hippo pathway through interaction and colocalization with Merlin, which promotes PIP2-dependent Merlin activation and induces local recruitment of LATS1 to the PIP2-rich PM and its activation, thereby negatively regulating YAP/TAZ activity. Video Abstract.
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Affiliation(s)
- Truc Phan Hoang Le
- Department of Biomedical Sciences, Ajou University Graduate School of Medicine, Suwon, Gyeonggi, 16499, Republic of Korea
| | - Nga Thi Thanh Nguyen
- Department of Biomedical Sciences, Ajou University Graduate School of Medicine, Suwon, Gyeonggi, 16499, Republic of Korea
| | - Duong Duy Thai Le
- Department of Biomedical Sciences, Ajou University Graduate School of Medicine, Suwon, Gyeonggi, 16499, Republic of Korea
| | - Muhammad Ayaz Anwar
- Department of Applied Chemistry, Kyung Hee University International Campus, Yongin, Gyeonggi, 17104, Republic of Korea
| | - Sang Yoon Lee
- Department of Biomedical Sciences, Ajou University Graduate School of Medicine, Suwon, Gyeonggi, 16499, Republic of Korea.
- Institute of Medical Science, Ajou University School of Medicine, Suwon, Gyeonggi, 16499, Republic of Korea.
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17
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Zhu M, Xu M, Zhang J, Zheng C. The role of Hippo pathway in ovarian development. Front Physiol 2023; 14:1198873. [PMID: 37334049 PMCID: PMC10275494 DOI: 10.3389/fphys.2023.1198873] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2023] [Accepted: 05/22/2023] [Indexed: 06/20/2023] Open
Abstract
The follicle is the functional unit of the ovary, whereby ovarian development is largely dependent on the development of the follicles themselves. The activation, growth, and progression of follicles are modulated by a diverse range of factors, including reproductive endocrine system and multiple signaling pathways. The Hippo pathway exhibits a high degree of evolutionary conservation between both Drosophila and mammalian systems, and is recognized for its pivotal role in regulating cellular proliferation, control of organ size, and embryonic development. During the process of follicle development, the components of the Hippo pathway show temporal and spatial variations. Recent clinical studies have shown that ovarian fragmentation can activate follicles. The mechanism is that the mechanical signal of cutting triggers actin polymerization. This process leads to the disruption of the Hippo pathway and subsequently induces the upregulation of downstream CCN and apoptosis inhibitors, thereby promoting follicle development. Thus, the Hippo pathway plays a crucial role in both the activation and development of follicles. In this article, we focused on the development and atresia of follicles and the function of Hippo pathway in these processes. Additionally, the physiological effects of Hippo pathway in follicle activation are also explored.
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18
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Ali M, Khramushin A, Yadav VK, Schueler-Furman O, Ivarsson Y. Elucidation of Short Linear Motif-Based Interactions of the FERM Domains of Ezrin, Radixin, Moesin, and Merlin. Biochemistry 2023. [PMID: 37224425 DOI: 10.1021/acs.biochem.3c00096] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The ERM (ezrin, radixin, and moesin) family of proteins and the related protein merlin participate in scaffolding and signaling events at the cell cortex. The proteins share an N-terminal FERM [band four-point-one (4.1) ERM] domain composed of three subdomains (F1, F2, and F3) with binding sites for short linear peptide motifs. By screening the FERM domains of the ERMs and merlin against a phage library that displays peptides representing the intrinsically disordered regions of the human proteome, we identified a large number of novel ligands. We determined the affinities for the ERM and merlin FERM domains interacting with 18 peptides and validated interactions with full-length proteins through pull-down experiments. The majority of the peptides contained an apparent Yx[FILV] motif; others show alternative motifs. We defined distinct binding sites for two types of similar but distinct binding motifs (YxV and FYDF) using a combination of Rosetta FlexPepDock computational peptide docking protocols and mutational analysis. We provide a detailed molecular understanding of how the two types of peptides with distinct motifs bind to different sites on the moesin FERM phosphotyrosine binding-like subdomain and uncover interdependencies between the different types of ligands. The study expands the motif-based interactomes of the ERMs and merlin and suggests that the FERM domain acts as a switchable interaction hub.
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Affiliation(s)
- Muhammad Ali
- Department of Chemistry - BMC, Uppsala University, Husargatan 3, 751 23 Uppsala, Sweden
| | - Alisa Khramushin
- Department of Microbiology and Molecular Genetics, Institute for Medical Research Israel-Canada, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem 9112102, Israel
| | - Vikash K Yadav
- Department of Chemistry - BMC, Uppsala University, Husargatan 3, 751 23 Uppsala, Sweden
| | - Ora Schueler-Furman
- Department of Microbiology and Molecular Genetics, Institute for Medical Research Israel-Canada, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem 9112102, Israel
| | - Ylva Ivarsson
- Department of Chemistry - BMC, Uppsala University, Husargatan 3, 751 23 Uppsala, Sweden
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19
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Meli VS, Veerasubramanian PK, Downing TL, Wang W, Liu WF. Mechanosensation to inflammation: Roles for YAP/TAZ in innate immune cells. Sci Signal 2023; 16:eadc9656. [PMID: 37130167 PMCID: PMC10625748 DOI: 10.1126/scisignal.adc9656] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Accepted: 04/14/2023] [Indexed: 05/04/2023]
Abstract
Innate immune cells are responsible for eliminating foreign infectious agents and cellular debris, and their ability to perceive, respond to, and integrate biochemical and mechanical cues from their microenvironment eventually determines their behavior. In response to tissue injury, pathogen invasion, or a biomaterial implant, immune cells activate many pathways to initiate inflammation in the tissue. In addition to common inflammatory pathways, studies have demonstrated the role of the mechanosensitive proteins and transcriptional coactivators YAP and TAZ (YAP/TAZ) in inflammation and immunity. We review our knowledge of YAP/TAZ in controlling inflammation and immunity in innate immune cells. Furthermore, we discuss the roles of YAP/TAZ in inflammatory diseases, wound healing, and tissue regeneration and how they integrate mechanical cues with biochemical signaling during disease progression. Last, we comment on possible approaches that can be exploited to harness the therapeutic potential of YAP/TAZ in inflammatory diseases.
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Affiliation(s)
- Vijaykumar S. Meli
- Department of Biomedical Engineering, University of California Irvine, CA 92697
- UCI Edwards Lifesciences Foundation Cardiovascular Innovation and Research Center, (CIRC), University of California Irvine, CA 92697
| | - Praveen Krishna Veerasubramanian
- Department of Biomedical Engineering, University of California Irvine, CA 92697
- UCI Edwards Lifesciences Foundation Cardiovascular Innovation and Research Center, (CIRC), University of California Irvine, CA 92697
| | - Timothy L. Downing
- Department of Biomedical Engineering, University of California Irvine, CA 92697
- UCI Edwards Lifesciences Foundation Cardiovascular Innovation and Research Center, (CIRC), University of California Irvine, CA 92697
- NSF-Simons Center for Multiscale Cell Fate Research, University of California Irvine, CA 92697
- Department of Microbiology and Molecular Genetics, University of California Irvine, CA 92697
| | - Wenqi Wang
- Department of Developmental and Cell Biology, University of California Irvine, CA 92697
| | - Wendy F. Liu
- Department of Biomedical Engineering, University of California Irvine, CA 92697
- UCI Edwards Lifesciences Foundation Cardiovascular Innovation and Research Center, (CIRC), University of California Irvine, CA 92697
- Department of Chemical and Biomolecular Engineering, University of California Irvine, CA 92697
- Department of Molecular Biology and Biochemistry, University of California Irvine, CA 92697
- Institute for Immunology, University of California Irvine, CA 92697
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20
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He XY, Fan X, Qu L, Wang X, Jiang L, Sang LJ, Shi CY, Lin S, Yang JC, Yang ZZ, Lei K, Li JH, Ju HQ, Yan Q, Liu J, Wang F, Shao J, Xiong Y, Wang W, Lin A. LncRNA modulates Hippo-YAP signaling to reprogram iron metabolism. Nat Commun 2023; 14:2253. [PMID: 37080959 PMCID: PMC10119135 DOI: 10.1038/s41467-023-37871-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Accepted: 04/03/2023] [Indexed: 04/22/2023] Open
Abstract
Iron metabolism dysregulation is tightly associated with cancer development. But the underlying mechanisms remain poorly understood. Increasing evidence has shown that long noncoding RNAs (lncRNAs) participate in various metabolic processes via integrating signaling pathway. In this study, we revealed one iron-triggered lncRNA, one target of YAP, LncRIM (LncRNA Related to Iron Metabolism, also named ZBED5-AS1 and Loc729013), which effectively links the Hippo pathway to iron metabolism and is largely independent on IRP2. Mechanically, LncRIM directly binds NF2 to inhibit NF2-LATS1 interaction, which causes YAP activation and increases intracellular iron level via DMT1 and TFR1. Additionally, LncRIM-NF2 axis mediates cellular iron metabolism dependent on the Hippo pathway. Clinically, high expression of LncRIM correlates with poor patient survival, suggesting its potential use as a biomarker and therapeutic target. Taken together, our study demonstrated a novel mechanism in which LncRIM-NF2 axis facilitates iron-mediated feedback loop to hyperactivate YAP and promote breast cancer development.
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Affiliation(s)
- Xin-Yu He
- MOE Laboratory of Biosystem Homeostasis and Protection, College of Life Sciences, Zhejiang University, 310058, Hangzhou, Zhejiang, China
- Cancer Center, Zhejiang University, 310058, Hangzhou, Zhejiang, China
- Key Laboratory for Cell and Gene Engineering of Zhejiang Province, 310058, Hangzhou, Zhejiang, China
| | - Xiao Fan
- MOE Laboratory of Biosystem Homeostasis and Protection, College of Life Sciences, Zhejiang University, 310058, Hangzhou, Zhejiang, China
- Cancer Center, Zhejiang University, 310058, Hangzhou, Zhejiang, China
- Key Laboratory for Cell and Gene Engineering of Zhejiang Province, 310058, Hangzhou, Zhejiang, China
| | - Lei Qu
- MOE Laboratory of Biosystem Homeostasis and Protection, College of Life Sciences, Zhejiang University, 310058, Hangzhou, Zhejiang, China
- Cancer Center, Zhejiang University, 310058, Hangzhou, Zhejiang, China
- Key Laboratory for Cell and Gene Engineering of Zhejiang Province, 310058, Hangzhou, Zhejiang, China
| | - Xiang Wang
- Department of Central Laboratory, the First People's Hospital of Huzhou, 158 Guangchang Back Road, 313000, Huzhou, Zhejiang, P.R. China
| | - Li Jiang
- Department of Nutrition, Precision Nutrition Innovation Center, School of Public Health, Zhejiang University School of Medicine, 310058, Hangzhou, Zhejiang, China
| | - Ling-Jie Sang
- MOE Laboratory of Biosystem Homeostasis and Protection, College of Life Sciences, Zhejiang University, 310058, Hangzhou, Zhejiang, China
| | - Cheng-Yu Shi
- MOE Laboratory of Biosystem Homeostasis and Protection, College of Life Sciences, Zhejiang University, 310058, Hangzhou, Zhejiang, China
| | - Siyi Lin
- MOE Laboratory of Biosystem Homeostasis and Protection, College of Life Sciences, Zhejiang University, 310058, Hangzhou, Zhejiang, China
| | - Jie-Cheng Yang
- MOE Laboratory of Biosystem Homeostasis and Protection, College of Life Sciences, Zhejiang University, 310058, Hangzhou, Zhejiang, China
| | - Zuo-Zhen Yang
- MOE Laboratory of Biosystem Homeostasis and Protection, College of Life Sciences, Zhejiang University, 310058, Hangzhou, Zhejiang, China
| | - Kai Lei
- MOE Laboratory of Biosystem Homeostasis and Protection, College of Life Sciences, Zhejiang University, 310058, Hangzhou, Zhejiang, China
| | - Jun-Hong Li
- MOE Laboratory of Biosystem Homeostasis and Protection, College of Life Sciences, Zhejiang University, 310058, Hangzhou, Zhejiang, China
| | - Huai-Qiang Ju
- Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, 510060, Guangzhou, Guangdong, China
| | - Qingfeng Yan
- MOE Laboratory of Biosystem Homeostasis and Protection, College of Life Sciences, Zhejiang University, 310058, Hangzhou, Zhejiang, China
| | - Jian Liu
- Hangzhou Cancer Institution, Affiliated Hangzhou Cancer Hospital, Zhejiang University School of Medicine, Zhejiang University, 310002, Hangzhou, Zhejiang, China
- Zhejiang University-University of Edinburgh Institute (ZJU-UoE Institute), Zhejiang University School of Medicine, International Campus, Zhejiang University, 314400, Haining, Zhejiang, China
| | - Fudi Wang
- Department of Nutrition, Precision Nutrition Innovation Center, School of Public Health, Zhejiang University School of Medicine, 310058, Hangzhou, Zhejiang, China
| | - Jianzhong Shao
- MOE Laboratory of Biosystem Homeostasis and Protection, College of Life Sciences, Zhejiang University, 310058, Hangzhou, Zhejiang, China
| | - Yan Xiong
- Department of Orthopedic Surgery, the Second Affiliated Hospital, School of Medicine, Zhejiang University, 88 Jiefang Road, 310000, Hangzhou, Zhejiang, China
| | - Wenqi Wang
- Department of Developmental and Cell Biology, University of California, Irvine, Irvine, CA, 92697, USA.
| | - Aifu Lin
- MOE Laboratory of Biosystem Homeostasis and Protection, College of Life Sciences, Zhejiang University, 310058, Hangzhou, Zhejiang, China.
- Cancer Center, Zhejiang University, 310058, Hangzhou, Zhejiang, China.
- Key Laboratory for Cell and Gene Engineering of Zhejiang Province, 310058, Hangzhou, Zhejiang, China.
- International School of Medicine, International Institutes of Medicine, The 4th Affiliated Hospital of Zhejiang University School of Medicine, 322000, Yiwu, Zhejiang, China.
- Breast Center of the First Affiliated Hospital, School of Medicine, Zhejiang University, 310003, Hangzhou, Zhejiang, China.
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21
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Shao Y, Wang Y, Sun L, Zhou S, Xu J, Xing D. MST1: A future novel target for cardiac diseases. Int J Biol Macromol 2023; 239:124296. [PMID: 37011743 DOI: 10.1016/j.ijbiomac.2023.124296] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Revised: 03/28/2023] [Accepted: 03/29/2023] [Indexed: 04/03/2023]
Abstract
Major heart diseases pose a serious threat to human health. Finding early diagnostic markers and key therapeutic targets is an urgent scientific problem in this field. Mammalian sterile 20-like kinase 1 (MST1) is a protein kinase, and the occurrence of many heart diseases is related to the continuous activation of the MST1 gene. With the deepening of the research, the potential role of MST1 in promoting the development of heart disease has become more apparent. Therefore, to better understand the role of MST1 in the pathogenesis of heart disease, this work systematically summarizes the role of MST1 in the pathogenesis of heart disease, gives a comprehensive overview of its possible strategies in the diagnosis and treatment of heart disease, and analyzes its potential significance as a marker for the diagnosis and treatment of heart disease.
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Affiliation(s)
- Yingchun Shao
- Cancer Institute, The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao Cancer Institute, Qingdao 266071, China
| | - Yanhong Wang
- Cancer Institute, The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao Cancer Institute, Qingdao 266071, China
| | - Li Sun
- Cancer Institute, The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao Cancer Institute, Qingdao 266071, China
| | - Sha Zhou
- Cancer Institute, The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao Cancer Institute, Qingdao 266071, China
| | - Jiazhen Xu
- Cancer Institute, The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao Cancer Institute, Qingdao 266071, China
| | - Dongming Xing
- Cancer Institute, The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao Cancer Institute, Qingdao 266071, China; School of Life Sciences, Tsinghua University, Beijing 100084, China.
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22
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Amirifar P, Kissil J. The role of Motin family proteins in tumorigenesis-an update. Oncogene 2023; 42:1265-1271. [PMID: 36973516 DOI: 10.1038/s41388-023-02677-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 03/15/2023] [Accepted: 03/17/2023] [Indexed: 03/29/2023]
Abstract
The Motin protein family consists of three members: AMOT (p80 and p130 isoforms), AMOT-like protein 1 (AMOTL1), and AMOT-like protein 2 (AMOTL2). The family members play an important role in processes such as cell proliferation, migration, angiogenesis, tight junction formation, and cell polarity. These functions are mediated through the involvement of the Motins in the regulation of different signal transduction pathways, including those regulated by small G-proteins and the Hippo-YAP pathway. One of the more characterized aspects of Motin family function is their role in regulating signaling through the Hippo-YAP pathway, and while some studies suggest a YAP-inhibitory function other studies indicate the Motins are required for YAP activity. This duality is also reflected in previous reports, often contradictory, that suggest the Motin proteins can function as oncogenes or tumor suppressors in tumorigenesis. In this review we summarize recent findings and integrate that with the existing work describing the multifunctional role of the Motins in different cancers. The emerging picture suggests that the Motin protein function is cell-type and context dependent and that further investigation in relevant cell types and whole organism models is required for the elucidation of the function of this protein family.
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Affiliation(s)
- Parisa Amirifar
- Department of Molecular Oncology, Cancer Biology Evolution Program, H. Lee Moffitt Cancer Center, Tampa, FL, USA
| | - Joseph Kissil
- Department of Molecular Oncology, Cancer Biology Evolution Program, H. Lee Moffitt Cancer Center, Tampa, FL, USA.
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23
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Eaton C, Avalos L, Liu SJ, Casey-Clyde T, Bisignano P, Lucas CH, Stevenson E, Choudhury A, Vasudevan H, Magill S, Krogan N, Villanueva-Meyer J, Swaney D, Raleigh D. Merlin S13 phosphorylation controls meningioma Wnt signaling and magnetic resonance imaging features. RESEARCH SQUARE 2023:rs.3.rs-2577844. [PMID: 36993679 PMCID: PMC10055685 DOI: 10.21203/rs.3.rs-2577844/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Meningiomas are the most common primary intracranial tumors and are associated with inactivation of the tumor suppressor NF2/Merlin, but one-third of meningiomas retain Merlin expression and typically have favorable clinical outcomes. Biochemical mechanisms underlying Merlin-intact meningioma growth are incompletely understood, and non-invasive biomarkers that predict meningioma outcomes and could be used to guide treatment de-escalation or imaging surveillance of Merlin-intact meningiomas are lacking. Here we integrate single-cell RNA sequencing, proximity-labeling proteomic mass spectrometry, mechanistic and functional approaches, and magnetic resonance imaging (MRI) across meningioma cells, xenografts, and human patients to define biochemical mechanisms and an imaging biomarker that distinguish Merlin-intact meningiomas with favorable clinical outcomes from meningiomas with unfavorable clinical outcomes. We find Merlin drives meningioma Wnt signaling and tumor growth through a feed-forward mechanism that requires Merlin dephosphorylation on serine 13 (S13) to attenuate inhibitory interactions with β-catenin and activate the Wnt pathway. Meningioma MRI analyses of xenografts and human patients show Merlin-intact meningiomas with S13 phosphorylation and favorable clinical outcomes are associated with high apparent diffusion coefficient (ADC) on diffusion-weighted imaging. In sum, our results shed light on Merlin posttranslational modifications that regulate meningioma Wnt signaling and tumor growth in tumors without NF2/Merlin inactivation. To translate these findings to clinical practice, we establish a non-invasive imaging biomarker that could be used to guide treatment de-escalation or imaging surveillance for patients with favorable meningiomas.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | - Nevan Krogan
- Quantitative Biosciences Institute, University of California San Francisco
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24
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Senju Y, Hibino E. Moesin-ezrin-radixin-like protein merlin: Its conserved and distinct functions from those of ERM proteins. BIOCHIMICA ET BIOPHYSICA ACTA. BIOMEMBRANES 2023; 1865:184076. [PMID: 36302494 DOI: 10.1016/j.bbamem.2022.184076] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Revised: 10/13/2022] [Accepted: 10/18/2022] [Indexed: 11/06/2022]
Affiliation(s)
- Yosuke Senju
- Research Institute for Interdisciplinary Science (RIIS), Okayama University, Okayama, Japan.
| | - Emi Hibino
- Graduate School of Pharmaceutical Sciences, Nagoya University, Aichi, Japan
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25
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Li W, Shu X, Zhang X, Zhang Z, Sun S, Li N, Long M. Potential Roles of YAP/TAZ Mechanotransduction in Spaceflight-Induced Liver Dysfunction. Int J Mol Sci 2023; 24:ijms24032197. [PMID: 36768527 PMCID: PMC9917057 DOI: 10.3390/ijms24032197] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2022] [Revised: 01/16/2023] [Accepted: 01/19/2023] [Indexed: 01/24/2023] Open
Abstract
Microgravity exposure during spaceflight causes the disordered regulation of liver function, presenting a specialized mechano-biological coupling process. While YAP/TAZ serves as a typical mechanosensitive pathway involved in hepatocyte metabolism, it remains unclear whether and how it is correlated with microgravity-induced liver dysfunction. Here, we discussed liver function alterations induced by spaceflight or simulated effects of microgravity on Earth. The roles of YAP/TAZ serving as a potential bridge in connecting liver metabolism with microgravity were specifically summarized. Existing evidence indicated that YAP/TAZ target gene expressions were affected by mechanotransductive pathways and phase separation, reasonably speculating that microgravity might regulate YAP/TAZ activation by disrupting these pathways via cytoskeletal remodeling or nuclear deformation, or disturbing condensates formation via diffusion limit, and then breaking liver homeostasis.
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Affiliation(s)
- Wang Li
- Center for Biomechanics and Bioengineering, Beijing Key Laboratory of Engineered Construction and Mechanobiology and Key Laboratory of Microgravity (National Microgravity Laboratory), Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China
- School of Engineering Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xinyu Shu
- Center for Biomechanics and Bioengineering, Beijing Key Laboratory of Engineered Construction and Mechanobiology and Key Laboratory of Microgravity (National Microgravity Laboratory), Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China
- School of Engineering Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiaoyu Zhang
- Center for Biomechanics and Bioengineering, Beijing Key Laboratory of Engineered Construction and Mechanobiology and Key Laboratory of Microgravity (National Microgravity Laboratory), Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China
- School of Engineering Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Ziliang Zhang
- Center for Biomechanics and Bioengineering, Beijing Key Laboratory of Engineered Construction and Mechanobiology and Key Laboratory of Microgravity (National Microgravity Laboratory), Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China
| | - Shujin Sun
- Center for Biomechanics and Bioengineering, Beijing Key Laboratory of Engineered Construction and Mechanobiology and Key Laboratory of Microgravity (National Microgravity Laboratory), Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China
- School of Engineering Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Ning Li
- Center for Biomechanics and Bioengineering, Beijing Key Laboratory of Engineered Construction and Mechanobiology and Key Laboratory of Microgravity (National Microgravity Laboratory), Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China
- School of Engineering Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
- Correspondence: (N.L.); (M.L.)
| | - Mian Long
- Center for Biomechanics and Bioengineering, Beijing Key Laboratory of Engineered Construction and Mechanobiology and Key Laboratory of Microgravity (National Microgravity Laboratory), Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China
- School of Engineering Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
- Correspondence: (N.L.); (M.L.)
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26
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CircAMOTL1 RNA and AMOTL1 Protein: Complex Functions of AMOTL1 Gene Products. Int J Mol Sci 2023; 24:ijms24032103. [PMID: 36768425 PMCID: PMC9916871 DOI: 10.3390/ijms24032103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Revised: 01/16/2023] [Accepted: 01/18/2023] [Indexed: 01/25/2023] Open
Abstract
The complexity of the cellular proteome facilitates the control of a wide range of cellular processes. Non-coding RNAs, including microRNAs and long non-coding RNAs, greatly contribute to the repertoire of tools used by cells to orchestrate various functions. Circular RNAs (circRNAs) constitute a specific class of non-coding RNAs that have recently emerged as a widely generated class of molecules produced from many eukaryotic genes that play essential roles in regulating cellular processes in health and disease. This review summarizes current knowledge about circRNAs and focuses on the functions of AMOTL1 circRNAs and AMOTL1 protein. Both products from the AMOTL1 gene have well-known functions in physiology, cancer, and other disorders. Using AMOTL1 as an example, we illustrate how focusing on both circRNAs and proteins produced from the same gene contributes to a better understanding of gene functions.
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27
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Xiang J, Jiang M, Du X. The role of Hippo pathway in ferroptosis. Front Oncol 2023; 12:1107505. [PMID: 36713588 PMCID: PMC9874674 DOI: 10.3389/fonc.2022.1107505] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2022] [Accepted: 12/15/2022] [Indexed: 01/12/2023] Open
Abstract
The role of Hippo pathway in ferroptosis The Hippo pathway is mainly composed of mammalian serine/threonine (Ste20)like kinases 1/2 (MST1/2), large tumor suppressor 1/2 (LATS1/2), and transcriptional coactivator Yes-associated protein (YAP), and is closely related to cell growth, survival, proliferation, and migration; tissue and organ size control; and tumorigenesis and development. Ferroptosis is a regulated form of cell death characterized by the accumulation of iron-dependent reactive oxygen species (ROS) and the depletion of plasma membrane polyunsaturated fatty acids (PUFAs), which is caused by the imbalance of oxidation and the antioxidant system. This article elaborates the role of Hippo pathway in ferroptosis, providing ideas for the regulation of cell fate and the treatment of tumors.
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Affiliation(s)
- Jiangxia Xiang
- Department of Traumatology, Chongqing Emergency Medical Center, Chongqing University Central Hospital, Chongqing, China
| | - Mengmeng Jiang
- Department of Medical Oncology, The Third Central Hospital of Tianjin, Tianjin, China
| | - Xing Du
- Department of Orthopedics, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China,Orthopedic Laboratory of Chongqing Medical University, Chongqing, China,*Correspondence: Xing Du,
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28
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Yang S, Wang S, Chen L, Wang Z, Chen J, Ni Q, Guo X, Zhang L, Xue G. Neutrophil Extracellular Traps Delay Diabetic Wound Healing by Inducing Endothelial-to-Mesenchymal Transition via the Hippo pathway. Int J Biol Sci 2023; 19:347-361. [PMID: 36594092 PMCID: PMC9760440 DOI: 10.7150/ijbs.78046] [Citation(s) in RCA: 22] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Accepted: 11/05/2022] [Indexed: 12/23/2022] Open
Abstract
Diabetic foot ulcers (DFUs) are among the most frequent complications of diabetes with significant morbidity and mortality. Diabetes can trigger neutrophils to undergo histone citrullination by protein arginine deiminase 4 (encoded by Padi4 in mice) and release neutrophil extracellular traps (NETs). The specific mechanism of NETs-mediated wound healing impairment in diabetes remains unknown. In this study, we show neutrophils are more susceptible to NETosis in diabetic wound environments. Via in vitro experiments and in vivo models of wound healing using wide-type and Padi4 -/- mice, we demonstrate NETs can induce the activation of PAK2 via the membrane receptor TLR-9. Then PAK2 phosphorylates the intracellular protein Merlin/NF2 to inhibit the Hippo-YAP pathway. YAP binds to transcription factor SMAD2 and translocates from the cytoplasm into the nucleus to promote endothelial-to-mesenchymal transition (EndMT), which ultimately impedes angiogenesis and delays wound healing. Suppression of the Merlin/YAP/SMAD2 pathway can attenuate NET-induced EndMT. Inhibition of NETosis accelerates wound healing by reducing EndMT and promoting angiogenesis. Cumulatively, these data suggest NETosis delays diabetic wound healing by inducing EndMT via the Hippo-YAP pathway. Increased understanding of the molecular mechanism that regulates NETosis and EndMT will be of considerable value for providing cellular targets amenable to therapeutic intervention for DFUs.
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Affiliation(s)
- Shuofei Yang
- Department of Vascular Surgery, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Pujian Road 160, Shanghai 200127, China,✉ Corresponding authors: Shuofei Yang, , Telephone No. +86 13764227372; Lan Zhang, , Telephone No. +86 13764227372; Guanhua Xue, , Telephone No. +86 13310166810
| | - ShuangShuang Wang
- Songyuan Central Hospital, Songyuan Children's Hospital, Songyuan, China
| | - Liang Chen
- Department of Vascular Surgery, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Pujian Road 160, Shanghai 200127, China
| | - Zheyu Wang
- Department of Vascular Surgery, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Pujian Road 160, Shanghai 200127, China
| | - Jiaquan Chen
- Department of Vascular Surgery, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Pujian Road 160, Shanghai 200127, China
| | - Qihong Ni
- Department of Vascular Surgery, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Pujian Road 160, Shanghai 200127, China
| | - Xiangjiang Guo
- Department of Vascular Surgery, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Pujian Road 160, Shanghai 200127, China
| | - Lan Zhang
- Department of Vascular Surgery, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Pujian Road 160, Shanghai 200127, China,✉ Corresponding authors: Shuofei Yang, , Telephone No. +86 13764227372; Lan Zhang, , Telephone No. +86 13764227372; Guanhua Xue, , Telephone No. +86 13310166810
| | - Guanhua Xue
- Department of Vascular Surgery, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Pujian Road 160, Shanghai 200127, China,✉ Corresponding authors: Shuofei Yang, , Telephone No. +86 13764227372; Lan Zhang, , Telephone No. +86 13764227372; Guanhua Xue, , Telephone No. +86 13310166810
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29
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Hennigan RF, Thomson CS, Stachowski K, Nassar N, Ratner N. Merlin tumor suppressor function is regulated by PIP2-mediated dimerization. PLoS One 2023; 18:e0281876. [PMID: 36809290 PMCID: PMC9942953 DOI: 10.1371/journal.pone.0281876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Accepted: 01/30/2023] [Indexed: 02/23/2023] Open
Abstract
Neurofibromatosis Type 2 is an inherited disease characterized by Schwann cell tumors of cranial and peripheral nerves. The NF2 gene encodes Merlin, a member of the ERM family consisting of an N-terminal FERM domain, a central α-helical region, and a C-terminal domain. Changes in the intermolecular FERM-CTD interaction allow Merlin to transition between an open, FERM accessible conformation and a closed, FERM-inaccessible conformation, modulating Merlin activity. Merlin has been shown to dimerize, but the regulation and function Merlin dimerization is not clear. We used a nanobody based binding assay to show that Merlin dimerizes via a FERM-FERM interaction, orientated with each C-terminus close to each other. Patient derived and structural mutants show that dimerization controls interactions with specific binding partners, including HIPPO pathway components, and correlates with tumor suppressor activity. Gel filtration experiments showed that dimerization occurs after a PIP2 mediated transition from closed to open conformation monomers. This process requires the first 18 amino acids of the FERM domain and is inhibited by phosphorylation at serine 518. The discovery that active, open conformation Merlin is a dimer represents a new paradigm for Merlin function with implications for the development of therapies designed to compensate for Merlin loss.
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Affiliation(s)
- Robert F. Hennigan
- Division of Experimental Hematology and Cancer Biology, Cincinnati Children’s Hospital Medical Center, Department of Pediatrics, University of Cincinnati, Cincinnati, OH, United States of America
- * E-mail:
| | - Craig S. Thomson
- Division of Experimental Hematology and Cancer Biology, Cincinnati Children’s Hospital Medical Center, Department of Pediatrics, University of Cincinnati, Cincinnati, OH, United States of America
| | - Kye Stachowski
- Division of Experimental Hematology and Cancer Biology, Cincinnati Children’s Hospital Medical Center, Department of Pediatrics, University of Cincinnati, Cincinnati, OH, United States of America
| | - Nicolas Nassar
- Division of Experimental Hematology and Cancer Biology, Cincinnati Children’s Hospital Medical Center, Department of Pediatrics, University of Cincinnati, Cincinnati, OH, United States of America
| | - Nancy Ratner
- Division of Experimental Hematology and Cancer Biology, Cincinnati Children’s Hospital Medical Center, Department of Pediatrics, University of Cincinnati, Cincinnati, OH, United States of America
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30
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A novel NF2 splicing mutant causes neurofibromatosis type 2 via liquid-liquid phase separation with large tumor suppressor and Hippo pathway. iScience 2022; 25:105275. [PMID: 36300003 PMCID: PMC9589172 DOI: 10.1016/j.isci.2022.105275] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Revised: 06/27/2022] [Accepted: 09/30/2022] [Indexed: 11/24/2022] Open
Abstract
Neurofibromatosis type 2 is an autosomal dominant multiple neoplasia syndrome and is usually caused by mutations in the neurofibromin 2 (NF2) gene, which encodes a tumor suppressor and initiates the Hippo pathway. However, the mechanism by which NF2 functions in the Hippo pathway isn’t fully understood. Here we identified a NF2 c.770-784del mutation from a neurofibromatosis type 2 family. MD simulations showed that this mutation significantly changed the structure of the F3 module of the NF2-FERM domain. Functional assays indicated that the NF2 c.770-784del variant formed LLPS in the cytoplasm with LATS to restrain LATS plasma membrane localization and inactivated the Hippo pathway. Besides, this deletion partly caused a skipping of exon 8 and reduced the protein level of NF2, collectively promoting proliferation and tumorigenesis of meningeal cells. We identified an unrecognized mechanism of LLPS and splicing skipping for the NF2-induced Hippo pathway, which provided new insight into the pathogenesis of neurofibromatosis type 2. NF2 c.770-784 deletion is a novel mutation related to Neurofibromatosis type 2 NF2 variant forms LLPS in the cytoplasm with LATS and inhibits the Hippo pathway NF2 variant causes an aberrant skipping of exon 8 and reduces NF2 protein level NF2 variant promotes proliferation and tumorigenesis of meningeal cells
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31
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Koehler TJ, Tran T, Weingartner KA, Kavran JM. Kinetic Regulation of the Mammalian Sterile 20-like Kinase 2 (MST2). Biochemistry 2022; 61:1683-1693. [PMID: 35895874 PMCID: PMC10167949 DOI: 10.1021/acs.biochem.2c00022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Canonically, MST1/2 functions as a core kinase of the Hippo pathway and noncanonically during both apoptotic signaling and with RASSFs in T-cells. Faithful signal transduction by MST1/2 relies on both appropriate activation and regulated substrate phosphorylation by the activated kinase. Considerable progress has been made in understanding the molecular mechanisms regulating the activation of MST1/2 and identifying downstream signaling events. Here, we investigated the ability of MST2 to phosphorylate a peptide substrate and how that activity is regulated. Using a steady-state kinetic system, we parse the contribution of different factors to substrate phosphorylation, including the domains of MST2, phosphorylation, caspase cleavage, and complex formation. We found that in the unphosphorylated state, the SARAH domain stabilizes interactions with a peptide substrate and promotes turnover. Phosphorylation drives the activity of MST2, and once activated, MST2 is not further regulated by complex formation with other Hippo pathway components (SAV1, MOB1A, and RASSF5). We also show that the phosphorylated, caspase-cleaved MST2 is as active as the full-length one, suggesting that caspase-stimulated activity arises through noncatalytic mechanisms. The kinetic analysis presented here establishes a framework for interpreting how signaling events and post-translational modifications contribute to the signaling of MST2 in vivo.
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Affiliation(s)
- Thomas J Koehler
- Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland 21205, United States
| | - Thao Tran
- Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland 21205, United States
| | - Kyler A Weingartner
- Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland 21205, United States
| | - Jennifer M Kavran
- Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland 21205, United States.,Department of Biophysics and Biophysical Chemistry, School of Medicine, Johns Hopkins University, Baltimore, Maryland 21205, United States.,Department of Oncology, School of Medicine, Johns Hopkins University, Baltimore, Maryland 21205, United States
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Dubois F, Bazille C, Levallet J, Maille E, Brosseau S, Madelaine J, Bergot E, Zalcman G, Levallet G. Molecular Alterations in Malignant Pleural Mesothelioma: A Hope for Effective Treatment by Targeting YAP. Target Oncol 2022; 17:407-431. [PMID: 35906513 PMCID: PMC9345804 DOI: 10.1007/s11523-022-00900-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/05/2022] [Indexed: 01/11/2023]
Abstract
Malignant pleural mesothelioma is a rare and aggressive neoplasm, which has primarily been attributed to the exposure to asbestos fibers (83% of cases); yet, despite a ban of using asbestos in many countries, the incidence of malignant pleural mesothelioma failed to decline worldwide. While little progress has been made in malignant pleural mesothelioma diagnosis, bevacizumab at first, then followed by double immunotherapy (nivolumab plus ipilumumab), were all shown to improve survival in large phase III randomized trials. The morphological analysis of the histological subtyping remains the primary indicator for therapeutic decision making at an advanced disease stage, while a platinum-based chemotherapy regimen combined with pemetrexed, either with or without bevacizumab, is still the main treatment option. Consequently, malignant pleural mesothelioma still represents a significant health concern owing to poor median survival (12-18 months). Given this context, both diagnosis and therapy improvements require better knowledge of the molecular mechanisms underlying malignant pleural mesothelioma's carcinogenesis and progression. Hence, the Hippo pathway in malignant pleural mesothelioma initiation and progression has recently received increasing attention, as the aberrant expression of its core components may be closely related to patient prognosis. The purpose of this review was to provide a critical analysis of our current knowledge on these topics, the main focus being on the available evidence concerning the role of each Hippo pathway's member as a promising biomarker, enabling detection of the disease at earlier stages and thus improving prognosis.
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Affiliation(s)
- Fatéméh Dubois
- Normandie University, UNICAEN, CNRS, ISTCT Unit, Avenue H. Becquerel, 14074, Caen, France.,Department of Pathology, CHU de Caen, Caen, France.,Federative Structure of Cyto-Molecular Oncogenetics (SF-MOCAE), CHU de Caen, Caen, France
| | - Céline Bazille
- Normandie University, UNICAEN, CNRS, ISTCT Unit, Avenue H. Becquerel, 14074, Caen, France.,Department of Pathology, CHU de Caen, Caen, France
| | - Jérôme Levallet
- Normandie University, UNICAEN, CNRS, ISTCT Unit, Avenue H. Becquerel, 14074, Caen, France
| | - Elodie Maille
- Normandie University, UNICAEN, CNRS, ISTCT Unit, Avenue H. Becquerel, 14074, Caen, France
| | - Solenn Brosseau
- Department of Thoracic Oncology and CIC1425, Hospital Bichat-Claude Bernard, Assistance Publique Hôpitaux de Paris, Université Paris-Diderot, Paris, France.,U830 INSERM "Genetics and Biology of Cancers, A.R.T Group", Curie Institute, Paris, France
| | - Jeannick Madelaine
- Department of Pulmonology and Thoracic Oncology, CHU de Caen, Caen, France
| | - Emmanuel Bergot
- Normandie University, UNICAEN, CNRS, ISTCT Unit, Avenue H. Becquerel, 14074, Caen, France.,Department of Pulmonology and Thoracic Oncology, CHU de Caen, Caen, France
| | - Gérard Zalcman
- Department of Thoracic Oncology and CIC1425, Hospital Bichat-Claude Bernard, Assistance Publique Hôpitaux de Paris, Université Paris-Diderot, Paris, France.,U830 INSERM "Genetics and Biology of Cancers, A.R.T Group", Curie Institute, Paris, France
| | - Guénaëlle Levallet
- Normandie University, UNICAEN, CNRS, ISTCT Unit, Avenue H. Becquerel, 14074, Caen, France. .,Department of Pathology, CHU de Caen, Caen, France. .,Federative Structure of Cyto-Molecular Oncogenetics (SF-MOCAE), CHU de Caen, Caen, France.
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Guo CL. Self-Sustained Regulation or Self-Perpetuating Dysregulation: ROS-dependent HIF-YAP-Notch Signaling as a Double-Edged Sword on Stem Cell Physiology and Tumorigenesis. Front Cell Dev Biol 2022; 10:862791. [PMID: 35774228 PMCID: PMC9237464 DOI: 10.3389/fcell.2022.862791] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Accepted: 04/29/2022] [Indexed: 12/19/2022] Open
Abstract
Organ development, homeostasis, and repair often rely on bidirectional, self-organized cell-niche interactions, through which cells select cell fate, such as stem cell self-renewal and differentiation. The niche contains multiplexed chemical and mechanical factors. How cells interpret niche structural information such as the 3D topology of organs and integrate with multiplexed mechano-chemical signals is an open and active research field. Among all the niche factors, reactive oxygen species (ROS) have recently gained growing interest. Once considered harmful, ROS are now recognized as an important niche factor in the regulation of tissue mechanics and topology through, for example, the HIF-YAP-Notch signaling pathways. These pathways are not only involved in the regulation of stem cell physiology but also associated with inflammation, neurological disorder, aging, tumorigenesis, and the regulation of the immune checkpoint molecule PD-L1. Positive feedback circuits have been identified in the interplay of ROS and HIF-YAP-Notch signaling, leading to the possibility that under aberrant conditions, self-organized, ROS-dependent physiological regulations can be switched to self-perpetuating dysregulation, making ROS a double-edged sword at the interface of stem cell physiology and tumorigenesis. In this review, we discuss the recent findings on how ROS and tissue mechanics affect YAP-HIF-Notch-PD-L1 signaling, hoping that the knowledge can be used to design strategies for stem cell-based and ROS-targeting therapy and tissue engineering.
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Fan S, Smith MS, Keeney J, O’Leary MN, Nusrat A, Parkos CA. JAM-A signals through the Hippo pathway to regulate intestinal epithelial proliferation. iScience 2022; 25:104316. [PMID: 35602956 PMCID: PMC9114518 DOI: 10.1016/j.isci.2022.104316] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Revised: 03/18/2022] [Accepted: 04/22/2022] [Indexed: 01/25/2023] Open
Abstract
JAM-A is a tight-junction-associated protein that contributes to regulation of intestinal homeostasis. We report that JAM-A interacts with NF2 and LATS1, functioning as an initiator of the Hippo signaling pathway, well-known for regulation of proliferation. Consistent with these findings, we observed increased YAP activity in JAM-A-deficient intestinal epithelial cells (IEC). Furthermore, overexpression of a dimerization-deficient mutant, JAM-A-DL1, failed to initiate Hippo signaling, phenocopying JAM-A-deficient IEC, whereas overexpression of JAM-A-WT activated Hippo signaling and suppressed proliferation. Lastly, we identify EVI1, a transcription factor reported to promote cellular proliferation, as a contributor to the pro-proliferative phenotype in JAM-A-DL1 overexpressing IEC downstream of YAP. Collectively, our findings establish a new role for JAM-A as a cell-cell contact sensor, raising implications for understanding the contribution(s) of JAM-A to IEC proliferation in the mammalian epithelium.
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Affiliation(s)
- Shuling Fan
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Michelle Sydney Smith
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Justin Keeney
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Monique N. O’Leary
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Asma Nusrat
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Charles A. Parkos
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
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Kim M, Kim JM, Cho EJ, Sung CO, Kim J, Jang SJ. β-Arrestin 2 suppresses the activation of YAP by promoting LATS kinase activity. Genes Dis 2022; 10:348-351. [DOI: 10.1016/j.gendis.2022.04.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Revised: 04/19/2022] [Accepted: 04/25/2022] [Indexed: 11/30/2022] Open
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Faraji F, Ramirez SI, Anguiano Quiroz PY, Mendez-Molina AN, Gutkind JS. Genomic Hippo Pathway Alterations and Persistent YAP/TAZ Activation: New Hallmarks in Head and Neck Cancer. Cells 2022; 11:1370. [PMID: 35456049 PMCID: PMC9028246 DOI: 10.3390/cells11081370] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Revised: 04/14/2022] [Accepted: 04/15/2022] [Indexed: 02/06/2023] Open
Abstract
Head and neck squamous cell carcinoma (HNSCC) represents a highly prevalent and deadly malignancy worldwide. The prognosis for locoregionally advanced HNSCC has not appreciably improved over the past 30 years despite advances in surgical, radiation, and targeted therapies and less than 20% of HNSCC patients respond to recently approved immune checkpoint inhibitors. The Hippo signaling pathway, originally discovered as a mechanism regulating tissue growth and organ size, transduces intracellular and extracellular signals to regulate the transcriptional co-activators YAP and TAZ. Alterations in the Hippo pathway resulting in persistent YAP and TAZ activation have emerged as major oncogenic drivers. Our analysis of the human HNSCC oncogenome revealed multiple genomic alterations impairing Hippo signaling and activating YAP and TAZ, which in turn contribute to HNSCC development. This includes mutations and deletions of the FAT1 gene (29%) and amplification of the WWTR1 (encoding TAZ, 14%) and YAP1 genes (8%), together representing one of the most genetically altered signaling mechanisms in this malignancy. Here, we discuss key elements of the mammalian Hippo pathway, detail mechanisms by which perturbations in Hippo signaling promote HNSCC initiation and progression and outline emerging strategies to target Hippo signaling vulnerabilities as part of novel multimodal precision therapies for HNSCC.
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Affiliation(s)
- Farhoud Faraji
- Department of Otolaryngology-Head and Neck Surgery, University of California San Diego Health, La Jolla, CA 92093, USA
- Gleiberman Head and Neck Cancer Center, University of California San Diego Health, La Jolla, CA 92093, USA
- Department of Pharmacology, Moores Cancer Center, University of California San Diego, La Jolla, CA 92093, USA;
| | - Sydney I. Ramirez
- Department of Pharmacology, Moores Cancer Center, University of California San Diego, La Jolla, CA 92093, USA;
- Division of Infectious Disease and Global Public Health, Department of Internal Medicine, University of California San Diego, La Jolla, CA 92037, USA
| | | | | | - J. Silvio Gutkind
- Gleiberman Head and Neck Cancer Center, University of California San Diego Health, La Jolla, CA 92093, USA
- Department of Pharmacology, Moores Cancer Center, University of California San Diego, La Jolla, CA 92093, USA;
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Imura T, Shimizu K, Mitsuhara T. Distinctive microRNA profiles in serum of patients with neurofibromatosis type 2: A bioinformatic exploratory study. World Neurosurg 2022; 164:e127-e133. [DOI: 10.1016/j.wneu.2022.04.042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Accepted: 04/08/2022] [Indexed: 11/25/2022]
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Kim CL, Lim SB, Kim K, Jeong HS, Mo JS. Phosphorylation analysis of the Hippo-YAP pathway using Phos-tag. J Proteomics 2022; 261:104582. [DOI: 10.1016/j.jprot.2022.104582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Revised: 03/22/2022] [Accepted: 03/31/2022] [Indexed: 10/18/2022]
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Nishina H. Physiological and pathological roles of the Hippo-YAP/TAZ signaling pathway in liver formation, homeostasis and tumorigenesis. Cancer Sci 2022; 113:1900-1908. [PMID: 35349740 PMCID: PMC9207356 DOI: 10.1111/cas.15352] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Revised: 03/22/2022] [Accepted: 03/26/2022] [Indexed: 11/28/2022] Open
Abstract
The liver plays central homeostatic roles in metabolism and detoxification, and has a remarkable capacity to fully recover from injuries caused by the various insults to which it is constantly exposed. To fulfill these functions, the liver must maintain a specific size and so must regulate its cell numbers. It must also remove senescent, transformed, and/or injured cells that impair liver function and can lead to diseases such as cirrhosis and liver cancer. Despite their importance, however, the mechanisms governing liver size control and homeostasis have resisted delineation. The discovery of the Hippo intracellular signaling pathway and its downstream effectors, the transcriptional coactivators Yes‐associated protein (YAP) and transcriptional coactivator with PDZ‐binding motif (TAZ), has provided partial elucidation of these mechanisms. The Hippo‐YAP/TAZ pathway is considered to be a cell’s sensor of its immediate microenvironment and the cells that surround it, in that this pathway responds to changes in elements such as the ECM, cell–cell tension, and cell adhesion. Once triggered, Hippo signaling negatively regulates the binding of YAP/TAZ to transcription factors such as TEAD and Smad, controlling their ability to drive gene expression needed for cellular responses such as proliferation, survival, and stemness. Numerous KO mouse strains lacking YAP/TAZ, as well as transgenic mice showing YAP/TAZ hyperactivation, have been generated, and the effects of these mutations on liver development, size, regeneration, homeostasis, and tumorigenesis have been reported. In this review, I summarize the components and regulation of Hippo‐YAP/TAZ signaling, and discuss this pathway in the context of liver physiology and pathology.
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Affiliation(s)
- Hiroshi Nishina
- Department of Developmental and Regenerative Biology, Medical Research Institute, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan
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40
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Esposito D, Pant I, Shen Y, Qiao RF, Yang X, Bai Y, Jin J, Poulikakos PI, Aaronson SA. ROCK1 mechano-signaling dependency of human malignancies driven by TEAD/YAP activation. Nat Commun 2022; 13:703. [PMID: 35121738 PMCID: PMC8817028 DOI: 10.1038/s41467-022-28319-3] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Accepted: 01/19/2022] [Indexed: 12/14/2022] Open
Abstract
Rho family mechano-signaling through the actin cytoskeleton positively regulates physiological TEAD/YAP transcription, while the evolutionarily conserved Hippo tumor suppressor pathway antagonizes this transcription through YAP cytoplasmic localization/degradation. The mechanisms responsible for oncogenic dysregulation of these pathways, their prevalence in tumors, as well as how such dysregulation can be therapeutically targeted are not resolved. We demonstrate that p53 DNA contact mutants in human tumors, indirectly hyperactivate RhoA/ROCK1/actomyosin signaling, which is both necessary and sufficient to drive oncogenic TEAD/YAP transcription. Moreover, we demonstrate that recurrent lesions in the Hippo pathway depend on physiological levels of ROCK1/actomyosin signaling for oncogenic TEAD/YAP transcription. Finally, we show that ROCK inhibitors selectively antagonize proliferation and motility of human tumors with either mechanism. Thus, we identify a cancer driver paradigm and a precision medicine approach for selective targeting of human malignancies driven by TEAD/YAP transcription through mechanisms that either upregulate or depend on homeostatic RhoA mechano-signaling.
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Affiliation(s)
- Davide Esposito
- Department of Oncological Sciences, Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA
| | - Ila Pant
- Department of Oncological Sciences, Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA
| | - Yao Shen
- Department of Oncological Sciences, Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA
| | - Rui F Qiao
- Department of Oncological Sciences, Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA
| | - Xiaobao Yang
- Mount Sinai Center for Therapeutics Discovery, Departments of Pharmacological Sciences and Oncological Sciences, Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA
| | - Yiyang Bai
- Department of Oncological Sciences, Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA
- Department of Medical Oncology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710061, China
| | - Jian Jin
- Mount Sinai Center for Therapeutics Discovery, Departments of Pharmacological Sciences and Oncological Sciences, Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA
| | - Poulikos I Poulikakos
- Department of Oncological Sciences, Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA
- Department of Dermatology, The Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA
| | - Stuart A Aaronson
- Department of Oncological Sciences, Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA.
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Kilanowska A, Ziółkowska A. Apoptosis in Type 2 Diabetes: Can It Be Prevented? Hippo Pathway Prospects. Int J Mol Sci 2022; 23:636. [PMID: 35054822 PMCID: PMC8775644 DOI: 10.3390/ijms23020636] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Revised: 12/20/2021] [Accepted: 01/05/2022] [Indexed: 02/04/2023] Open
Abstract
Diabetes mellitus is a heterogeneous disease of complex etiology and pathogenesis. Hyperglycemia leads to many serious complications, but also directly initiates the process of β cell apoptosis. A potential strategy for the preservation of pancreatic β cells in diabetes may be to inhibit the implementation of pro-apoptotic pathways or to enhance the action of pancreatic protective factors. The Hippo signaling pathway is proposed and selected as a target to manipulate the activity of its core proteins in therapy-basic research. MST1 and LATS2, as major upstream signaling kinases of the Hippo pathway, are considered as target candidates for pharmacologically induced tissue regeneration and inhibition of apoptosis. Manipulating the activity of components of the Hippo pathway offers a wide range of possibilities, and thus is a potential tool in the treatment of diabetes and the regeneration of β cells. Therefore, it is important to fully understand the processes involved in apoptosis in diabetic states and completely characterize the role of this pathway in diabetes. Therapy consisting of slowing down or stopping the mechanisms of apoptosis may be an important direction of diabetes treatment in the future.
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Affiliation(s)
- Agnieszka Kilanowska
- Department of Anatomy and Histology, Collegium Medicum, University of Zielona Gora, Zyty 28, 65-001 Zielona Gora, Poland;
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Lim YX, Lin H, Seah SH, Lim YP. Reciprocal Regulation of Hippo and WBP2 Signalling-Implications in Cancer Therapy. Cells 2021; 10:cells10113130. [PMID: 34831354 PMCID: PMC8625973 DOI: 10.3390/cells10113130] [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] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Revised: 10/08/2021] [Accepted: 11/08/2021] [Indexed: 11/23/2022] Open
Abstract
Cancer is a global health problem. The delineation of molecular mechanisms pertinent to cancer initiation and development has spurred cancer therapy in the form of precision medicine. The Hippo signalling pathway is a tumour suppressor pathway implicated in a multitude of cancers. Elucidation of the Hippo pathway has revealed an increasing number of regulators that are implicated, some being potential therapeutic targets for cancer interventions. WW domain-binding protein 2 (WBP2) is an oncogenic transcriptional co-factor that interacts, amongst others, with two other transcriptional co-activators, YAP and TAZ, in the Hippo pathway. WBP2 was recently discovered to modulate the upstream Hippo signalling components by associating with LATS2 and WWC3. Exacerbating the complexity of the WBP2/Hippo network, WBP2 itself is reciprocally regulated by Hippo-mediated microRNA biogenesis, contributing to a positive feedback loop that further drives carcinogenesis. Here, we summarise the biological mechanisms of WBP2/Hippo reciprocal regulation and propose therapeutic strategies to overcome Hippo defects in cancers through targeting WBP2.
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Affiliation(s)
- Yvonne Xinyi Lim
- Integrative Sciences and Engineering Programme, National University of Singapore, Singapore 119077, Singapore; (Y.X.L.); (H.L.); (S.H.S.)
- Department of Biochemistry, National University of Singapore, Singapore 117596, Singapore
| | - Hexian Lin
- Integrative Sciences and Engineering Programme, National University of Singapore, Singapore 119077, Singapore; (Y.X.L.); (H.L.); (S.H.S.)
- Department of Biochemistry, National University of Singapore, Singapore 117596, Singapore
| | - Sock Hong Seah
- Integrative Sciences and Engineering Programme, National University of Singapore, Singapore 119077, Singapore; (Y.X.L.); (H.L.); (S.H.S.)
- Mechanobiology Institute, National University of Singapore, Singapore 117411, Singapore
| | - Yoon Pin Lim
- Department of Biochemistry, National University of Singapore, Singapore 117596, Singapore
- Correspondence:
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Yeh CF, Chou C, Yang KC. Mechanotransduction in fibrosis: Mechanisms and treatment targets. CURRENT TOPICS IN MEMBRANES 2021; 87:279-314. [PMID: 34696888 DOI: 10.1016/bs.ctm.2021.07.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/29/2023]
Abstract
To perceive and integrate the environmental cues, cells and tissues sense and interpret various physical forces like shear, tensile, and compression stress. Mechanotransduction involves the sensing and translation of mechanical forces into biochemical and mechanical signals to guide cell fate and achieve tissue homeostasis. Disruption of this mechanical homeostasis by tissue injury elicits multiple cellular responses leading to pathological matrix deposition and tissue stiffening, and consequent evolution toward pro-inflammatory/pro-fibrotic phenotypes, leading to tissue/organ fibrosis. This review focuses on the molecular mechanisms linking mechanotransduction to fibrosis and uncovers the potential therapeutic targets to halt or resolve fibrosis.
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Affiliation(s)
- Chih-Fan Yeh
- Division of Cardiology, Department of Internal Medicine and Cardiovascular Center, National Taiwan University Hospital, Taipei, Taiwan; Department and Graduate Institute of Pharmacology, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Caroline Chou
- Department and Graduate Institute of Pharmacology, National Taiwan University College of Medicine, Taipei, Taiwan; Washington University in St. Louis, St. Louis, MO, United States
| | - Kai-Chien Yang
- Division of Cardiology, Department of Internal Medicine and Cardiovascular Center, National Taiwan University Hospital, Taipei, Taiwan; Department and Graduate Institute of Pharmacology, National Taiwan University College of Medicine, Taipei, Taiwan; Research Center for Developmental Biology & Regenerative Medicine, National Taiwan University, Taipei, Taiwan; Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan.
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Chen J, Cheng J, Zhao C, Zhao B, Mi J, Li W. The Hippo pathway: a renewed insight in the craniofacial diseases and hard tissue remodeling. Int J Biol Sci 2021; 17:4060-4072. [PMID: 34671220 PMCID: PMC8495397 DOI: 10.7150/ijbs.63305] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2021] [Accepted: 09/20/2021] [Indexed: 12/13/2022] Open
Abstract
The Hippo pathway plays an important role in many pathophysiological processes, including cell proliferation and differentiation, cell death, cell migration and invasion. Because of its extensive functions, Hippo pathway is closely related to not only growth and development, but also many diseases, including inflammation and cancer. In this study, the role of Hippo pathway in craniofacial diseases and hard tissue remodeling was reviewed, in attempting to find new research directions.
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Affiliation(s)
- Jun Chen
- Xiangya School of Stomatology, Central South University, Changsha 410008, China.,Xiangya Stomatological Hospital, Central South University, Changsha 410008, China.,Hunan Key Laboratory of Oral Health Research, Hunan 3D Printing Engineering Research Center of Oral Care, Hunan Clinical Research Center of Oral Major Diseases and Oral Health, Central South University, Changsha 410008, China
| | - Jingyi Cheng
- Xiangya School of Stomatology, Central South University, Changsha 410008, China
| | - Cong Zhao
- Xiangya School of Stomatology, Central South University, Changsha 410008, China
| | - Boxuan Zhao
- Xiangya School of Stomatology, Central South University, Changsha 410008, China
| | - Jia Mi
- Xiangya School of Stomatology, Central South University, Changsha 410008, China
| | - Wenjie Li
- Xiangya School of Stomatology, Central South University, Changsha 410008, China.,Xiangya Stomatological Hospital, Central South University, Changsha 410008, China.,Hunan Key Laboratory of Oral Health Research, Hunan 3D Printing Engineering Research Center of Oral Care, Hunan Clinical Research Center of Oral Major Diseases and Oral Health, Central South University, Changsha 410008, China.,National Key Laboratory of Science and Technology on High-strength Structural Materials, Central South University, Changsha 410083, China.,State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China
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Meng F, Yu Z, Zhang D, Chen S, Guan H, Zhou R, Wu Q, Zhang Q, Liu S, Venkat Ramani MK, Yang B, Ba XQ, Zhang J, Huang J, Bai X, Qin J, Feng XH, Ouyang S, Zhang YJ, Liang T, Xu P. Induced phase separation of mutant NF2 imprisons the cGAS-STING machinery to abrogate antitumor immunity. Mol Cell 2021; 81:4147-4164.e7. [PMID: 34453890 DOI: 10.1016/j.molcel.2021.07.040] [Citation(s) in RCA: 54] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Revised: 06/28/2021] [Accepted: 07/28/2021] [Indexed: 01/07/2023]
Abstract
Missense mutations of the tumor suppressor Neurofibromin 2 (NF2/Merlin/schwannomin) result in sporadic to frequent occurrences of tumorigenesis in multiple organs. However, the underlying pathogenicity of NF2-related tumorigenesis remains mostly unknown. Here we found that NF2 facilitated innate immunity by regulating YAP/TAZ-mediated TBK1 inhibition. Unexpectedly, patient-derived individual mutations in the FERM domain of NF2 (NF2m) converted NF2 into a potent suppressor of cGAS-STING signaling. Mechanistically, NF2m gained extreme associations with IRF3 and TBK1 and, upon innate nucleic acid sensing, was directly induced by the activated IRF3 to form cellular condensates, which contained the PP2A complex, to eliminate TBK1 activation. Accordingly, NF2m robustly suppressed STING-initiated antitumor immunity in cancer cell-autonomous and -nonautonomous murine models, and NF2m-IRF3 condensates were evident in human vestibular schwannomas. Our study reports phase separation-mediated quiescence of cGAS-STING signaling by a mutant tumor suppressor and reveals gain-of-function pathogenesis for NF2-related tumors by regulating antitumor immunity.
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MESH Headings
- Animals
- Female
- Gene Expression Regulation, Neoplastic
- HCT116 Cells
- HEK293 Cells
- Humans
- Immunity, Innate
- Interferon Regulatory Factor-3/genetics
- Interferon Regulatory Factor-3/metabolism
- Macrophages, Peritoneal/immunology
- Macrophages, Peritoneal/metabolism
- Male
- Melanoma, Experimental/genetics
- Melanoma, Experimental/immunology
- Melanoma, Experimental/metabolism
- Melanoma, Experimental/pathology
- Membrane Proteins/genetics
- Membrane Proteins/metabolism
- Mice, Inbred C57BL
- Mice, Transgenic
- Mutation, Missense
- Neoplasms/genetics
- Neoplasms/immunology
- Neoplasms/metabolism
- Neoplasms/pathology
- Neurofibromin 2/genetics
- Neurofibromin 2/metabolism
- Nucleotidyltransferases/genetics
- Nucleotidyltransferases/metabolism
- Protein Serine-Threonine Kinases/genetics
- Protein Serine-Threonine Kinases/metabolism
- Signal Transduction
- Tumor Escape
- Mice
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Affiliation(s)
- Fansen Meng
- MOE Laboratory of Biosystems Homeostasis & Protection and Zhejiang Provincial Key Laboratory for Cancer Molecular Cell Biology, Life Sciences Institute, Zhejiang University, Hangzhou 310058, China; Department of Hepatobiliary and Pancreatic Surgery and Zhejiang Provincial Key Laboratory of Pancreatic Disease, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China
| | - Zhengyang Yu
- MOE Laboratory of Biosystems Homeostasis & Protection and Zhejiang Provincial Key Laboratory for Cancer Molecular Cell Biology, Life Sciences Institute, Zhejiang University, Hangzhou 310058, China
| | - Dan Zhang
- MOE Laboratory of Biosystems Homeostasis & Protection and Zhejiang Provincial Key Laboratory for Cancer Molecular Cell Biology, Life Sciences Institute, Zhejiang University, Hangzhou 310058, China; Department of Hepatobiliary and Pancreatic Surgery and Zhejiang Provincial Key Laboratory of Pancreatic Disease, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China; ZJU-Hangzhou Global Scientific and Technological Innovation Center (HIC-ZJU), Hangzhou 310058, China
| | - Shasha Chen
- MOE Laboratory of Biosystems Homeostasis & Protection and Zhejiang Provincial Key Laboratory for Cancer Molecular Cell Biology, Life Sciences Institute, Zhejiang University, Hangzhou 310058, China; Cancer Center, Zhejiang University, Hangzhou 310058, China; College of Life and Environmental Science, Wenzhou University, Wenzhou 325035, China
| | - Hongxin Guan
- The Key Laboratory of Innate Immune Biology of Fujian Province, Biomedical Research Center of South China, College of Life Sciences, Fujian Normal University, Fuzhou 350117, China
| | - Ruyuan Zhou
- MOE Laboratory of Biosystems Homeostasis & Protection and Zhejiang Provincial Key Laboratory for Cancer Molecular Cell Biology, Life Sciences Institute, Zhejiang University, Hangzhou 310058, China; Department of Hepatobiliary and Pancreatic Surgery and Zhejiang Provincial Key Laboratory of Pancreatic Disease, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China; Cancer Center, Zhejiang University, Hangzhou 310058, China
| | - Qirou Wu
- MOE Laboratory of Biosystems Homeostasis & Protection and Zhejiang Provincial Key Laboratory for Cancer Molecular Cell Biology, Life Sciences Institute, Zhejiang University, Hangzhou 310058, China
| | - Qian Zhang
- MOE Laboratory of Biosystems Homeostasis & Protection and Zhejiang Provincial Key Laboratory for Cancer Molecular Cell Biology, Life Sciences Institute, Zhejiang University, Hangzhou 310058, China; Department of Hepatobiliary and Pancreatic Surgery and Zhejiang Provincial Key Laboratory of Pancreatic Disease, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China; Cancer Center, Zhejiang University, Hangzhou 310058, China
| | - Shengduo Liu
- MOE Laboratory of Biosystems Homeostasis & Protection and Zhejiang Provincial Key Laboratory for Cancer Molecular Cell Biology, Life Sciences Institute, Zhejiang University, Hangzhou 310058, China; Department of Hepatobiliary and Pancreatic Surgery and Zhejiang Provincial Key Laboratory of Pancreatic Disease, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China; ZJU-Hangzhou Global Scientific and Technological Innovation Center (HIC-ZJU), Hangzhou 310058, China
| | - Mukesh Kumar Venkat Ramani
- Department of Molecular Biosciences; Institute for Cellular and Molecular Biology, University of Texas at Austin, Austin, TX 78712 USA
| | - Bing Yang
- MOE Laboratory of Biosystems Homeostasis & Protection and Zhejiang Provincial Key Laboratory for Cancer Molecular Cell Biology, Life Sciences Institute, Zhejiang University, Hangzhou 310058, China
| | - Xiao-Qun Ba
- Department of Pathology, Zhejiang University First Affiliated Hospital and School of Medicine, Hangzhou, Zhejiang 310002, China
| | - Jing Zhang
- Department of Pathology, Zhejiang University First Affiliated Hospital and School of Medicine, Hangzhou, Zhejiang 310002, China
| | - Jun Huang
- MOE Laboratory of Biosystems Homeostasis & Protection and Zhejiang Provincial Key Laboratory for Cancer Molecular Cell Biology, Life Sciences Institute, Zhejiang University, Hangzhou 310058, China
| | - Xueli Bai
- Department of Hepatobiliary and Pancreatic Surgery and Zhejiang Provincial Key Laboratory of Pancreatic Disease, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China
| | - Jun Qin
- CAS Key Laboratory of Tissue Microenvironment and Tumor, Center for Excellence in Molecular Cell Science, Shanghai Institute of Nutrition and Health, Chinese Academy of Sciences, Shanghai 200031, China
| | - Xin-Hua Feng
- MOE Laboratory of Biosystems Homeostasis & Protection and Zhejiang Provincial Key Laboratory for Cancer Molecular Cell Biology, Life Sciences Institute, Zhejiang University, Hangzhou 310058, China; Cancer Center, Zhejiang University, Hangzhou 310058, China; Michael E. DeBakey Department of Surgery and Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Songying Ouyang
- The Key Laboratory of Innate Immune Biology of Fujian Province, Biomedical Research Center of South China, College of Life Sciences, Fujian Normal University, Fuzhou 350117, China
| | - Yan Jessie Zhang
- Department of Molecular Biosciences; Institute for Cellular and Molecular Biology, University of Texas at Austin, Austin, TX 78712 USA
| | - Tingbo Liang
- Department of Hepatobiliary and Pancreatic Surgery and Zhejiang Provincial Key Laboratory of Pancreatic Disease, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China; Cancer Center, Zhejiang University, Hangzhou 310058, China.
| | - Pinglong Xu
- MOE Laboratory of Biosystems Homeostasis & Protection and Zhejiang Provincial Key Laboratory for Cancer Molecular Cell Biology, Life Sciences Institute, Zhejiang University, Hangzhou 310058, China; Department of Hepatobiliary and Pancreatic Surgery and Zhejiang Provincial Key Laboratory of Pancreatic Disease, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China; ZJU-Hangzhou Global Scientific and Technological Innovation Center (HIC-ZJU), Hangzhou 310058, China; Cancer Center, Zhejiang University, Hangzhou 310058, China.
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46
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Zhang Y, Long J, Ren J, Huang X, Zhong P, Wang B. Potential Molecular Biomarkers of Vestibular Schwannoma Growth: Progress and Prospects. Front Oncol 2021; 11:731441. [PMID: 34646772 PMCID: PMC8503266 DOI: 10.3389/fonc.2021.731441] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2021] [Accepted: 09/06/2021] [Indexed: 12/25/2022] Open
Abstract
Vestibular schwannomas (VSs, also known as acoustic neuromas) are relatively rare benign brain tumors stem from the Schwann cells of the eighth cranial nerve. Tumor growth is the paramount factor for neurosurgeons to decide whether to choose aggressive treatment approach or careful follow-up with regular magnetic resonance imaging (MRI), as surgery and radiation can introduce significant trauma and affect neurological function, while tumor enlargement during long-term follow-up will compress the adjacent nerves and tissues, causing progressive hearing loss, tinnitus and vertigo. Recently, with the deepening research of VS biology, some proteins that regulate merlin conformation changes, inflammatory cytokines, miRNAs, tissue proteins and cerebrospinal fluid (CSF) components have been proposed to be closely related to tumor volume increase. In this review, we discuss advances in the study of biomarkers that associated with VS growth, providing a reference for exploring the growth course of VS and determining the optimal treatment strategy for each patient.
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Affiliation(s)
- Yu Zhang
- Department of Pharmacy, Huashan Hospital, Fudan University, Shanghai, China
| | - Jianfei Long
- Department of Pharmacy, Huashan Hospital, Fudan University, Shanghai, China
| | - Junwei Ren
- Department of Neurosurgery, Huashan Hospital, Fudan University, Shanghai, China
| | - Xiang Huang
- Department of Neurosurgery, Huashan Hospital, Fudan University, Shanghai, China
| | - Ping Zhong
- Department of Neurosurgery, Huashan Hospital, Fudan University, Shanghai, China
| | - Bin Wang
- Department of Pharmacy, Huashan Hospital, Fudan University, Shanghai, China
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47
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Wang Y, Zhu Y, Gu Y, Ma M, Wang Y, Qi S, Zeng Y, Zhu R, Wang X, Yu P, Xu J, Shu Y, Yu FX. Stabilization of Motin family proteins in NF2-deficient cells prevents full activation of YAP/TAZ and rapid tumorigenesis. Cell Rep 2021; 36:109596. [PMID: 34433060 DOI: 10.1016/j.celrep.2021.109596] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Revised: 06/12/2021] [Accepted: 08/03/2021] [Indexed: 11/27/2022] Open
Abstract
Germline alterations of the NF2 gene cause neurofibromatosis type 2, a syndrome manifested with benign tumors, and Nf2 deletion in mice also results in slow tumorigenesis. As a regulator of the Hippo signaling pathway, NF2 induces LATS1/2 kinases and consequently represses YAP/TAZ. YAP/TAZ oncoproteins are also inhibited by motin family proteins (Motins). Here, we show that the Hippo signaling is fine-tuned by Motins in a NF2-dependent manner, in which NF2 recruits E3 ligase RNF146 to facilitate ubiquitination and subsequent degradation of Motins. In the absence of NF2, Motins robustly accumulate to restrict full activation of YAP/TAZ and prevent rapid tumorigenesis. Hence, NF2 deficiency not only activates YAP/TAZ by inhibiting LATS1/2 but also stabilizes Motins to keep YAP/TAZ activity in check. The upregulation of Motins upon NF2 deletion serves as a strategy for avoiding uncontrolled perturbation of the Hippo signaling and may contribute to the benign nature of most NF2-mutated tumors.
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Affiliation(s)
- Yu Wang
- Institute of Pediatrics, Children's Hospital of Fudan University, and Shanghai Key Laboratory of Medical Epigenetics, International Co-laboratory of Medical Epigenetics and Metabolism, Institutes of Biomedical Sciences, Shanghai Medical College, Fudan University, Shanghai, China
| | - Yuwen Zhu
- Institute of Pediatrics, Children's Hospital of Fudan University, and Shanghai Key Laboratory of Medical Epigenetics, International Co-laboratory of Medical Epigenetics and Metabolism, Institutes of Biomedical Sciences, Shanghai Medical College, Fudan University, Shanghai, China
| | - Yuan Gu
- Institute of Pediatrics, Children's Hospital of Fudan University, and Shanghai Key Laboratory of Medical Epigenetics, International Co-laboratory of Medical Epigenetics and Metabolism, Institutes of Biomedical Sciences, Shanghai Medical College, Fudan University, Shanghai, China
| | - Mingyue Ma
- Institute of Pediatrics, Children's Hospital of Fudan University, and Shanghai Key Laboratory of Medical Epigenetics, International Co-laboratory of Medical Epigenetics and Metabolism, Institutes of Biomedical Sciences, Shanghai Medical College, Fudan University, Shanghai, China
| | - Yebin Wang
- Institute of Pediatrics, Children's Hospital of Fudan University, and Shanghai Key Laboratory of Medical Epigenetics, International Co-laboratory of Medical Epigenetics and Metabolism, Institutes of Biomedical Sciences, Shanghai Medical College, Fudan University, Shanghai, China
| | - Sixian Qi
- Institute of Pediatrics, Children's Hospital of Fudan University, and Shanghai Key Laboratory of Medical Epigenetics, International Co-laboratory of Medical Epigenetics and Metabolism, Institutes of Biomedical Sciences, Shanghai Medical College, Fudan University, Shanghai, China
| | - Yan Zeng
- Institute of Pediatrics, Children's Hospital of Fudan University, and Shanghai Key Laboratory of Medical Epigenetics, International Co-laboratory of Medical Epigenetics and Metabolism, Institutes of Biomedical Sciences, Shanghai Medical College, Fudan University, Shanghai, China
| | - Rui Zhu
- Institute of Pediatrics, Children's Hospital of Fudan University, and Shanghai Key Laboratory of Medical Epigenetics, International Co-laboratory of Medical Epigenetics and Metabolism, Institutes of Biomedical Sciences, Shanghai Medical College, Fudan University, Shanghai, China
| | - Xueying Wang
- Institute of Pediatrics, Children's Hospital of Fudan University, and Shanghai Key Laboratory of Medical Epigenetics, International Co-laboratory of Medical Epigenetics and Metabolism, Institutes of Biomedical Sciences, Shanghai Medical College, Fudan University, Shanghai, China
| | - Pengcheng Yu
- Institute of Pediatrics, Children's Hospital of Fudan University, and Shanghai Key Laboratory of Medical Epigenetics, International Co-laboratory of Medical Epigenetics and Metabolism, Institutes of Biomedical Sciences, Shanghai Medical College, Fudan University, Shanghai, China
| | - Jianhui Xu
- ENT Institute and Otorhinolaryngology, Department of Affiliated Eye and ENT Hospital, State Key Laboratory of Medical Neurobiology, NHC Key Laboratory of Hearing Medicine, Fudan University, Shanghai, China
| | - Yilai Shu
- ENT Institute and Otorhinolaryngology, Department of Affiliated Eye and ENT Hospital, State Key Laboratory of Medical Neurobiology, NHC Key Laboratory of Hearing Medicine, Fudan University, Shanghai, China
| | - Fa-Xing Yu
- Institute of Pediatrics, Children's Hospital of Fudan University, and Shanghai Key Laboratory of Medical Epigenetics, International Co-laboratory of Medical Epigenetics and Metabolism, Institutes of Biomedical Sciences, Shanghai Medical College, Fudan University, Shanghai, China.
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48
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Primi MC, Rangarajan ES, Patil DN, Izard T. Conformational flexibility determines the Nf2/merlin tumor suppressor functions. Matrix Biol Plus 2021; 12:100074. [PMID: 34337379 PMCID: PMC8318988 DOI: 10.1016/j.mbplus.2021.100074] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Revised: 06/14/2021] [Accepted: 06/15/2021] [Indexed: 10/26/2022] Open
Abstract
The Neurofibromatosis type 2 gene encodes the Nf2/merlin tumor suppressor protein that is responsible for the regulation of cell proliferation. Once activated, Nf2/merlin modulates adhesive signaling pathways and thereby inhibits cell growth. Nf2/merlin controls oncogenic gene expression by modulating the Hippo pathway. By responding to several physical and biochemical stimuli, Hippo signaling determines contact inhibition of proliferation as well as organ size. The large tumor suppressor (LATS) serine/threonine-protein kinase is the key enzyme in the highly conserved kinase cascade that negatively regulates the activity and localization of the transcriptional coactivators Yes-associated protein (YAP) and its paralogue transcriptional coactivator with PDZ-binding motif (TAZ). Nf2/merlin belongs to the band 4.1, ezrin, radixin, moesin (FERM) gene family that links the actin cytoskeleton to adherens junctions, remodels adherens junctions during epithelial morphogenesis and maintains organized apical surfaces on the plasma cell membrane. Nf2/merlin and ERM proteins have a globular N-terminal cloverleaf head domain, the FERM domain, that binds to the plasma membrane, a central α-helical domain, and a tail domain that binds to its head domain. Here we present the high-resolution crystal structure of Nf2/merlin bound to LATS1 which shows that LATS1 binding to Nf2/merlin displaces the Nf2/merlin tail domain and causes an allosteric shift in the Nf2/merlin α-helix that extends from its FERM domain. This is consistent with the fact that full-length Nf2/merlin binds LATS1 ~10-fold weaker compared to LATS1 binding to the Nf2/merlin-PIP2 complex. Our data increase our understanding of Nf2/merlin biology by providing mechanistic insights into the Hippo pathway that are relevant to several diseases in particular oncogenic features that are associated with cancers.
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Affiliation(s)
- Marina C Primi
- Cell Adhesion Laboratory, Department of Integrative Structural and Computational Biology, The Scripps Research Institute, Jupiter 33458, FL, United States
| | - Erumbi S Rangarajan
- Cell Adhesion Laboratory, Department of Integrative Structural and Computational Biology, The Scripps Research Institute, Jupiter 33458, FL, United States
| | - Dipak N Patil
- Cell Adhesion Laboratory, Department of Integrative Structural and Computational Biology, The Scripps Research Institute, Jupiter 33458, FL, United States
| | - Tina Izard
- Cell Adhesion Laboratory, Department of Integrative Structural and Computational Biology, The Scripps Research Institute, Jupiter 33458, FL, United States
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49
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Qin L, Yang D, Yi W, Cao H, Xiao G. Roles of leader and follower cells in collective cell migration. Mol Biol Cell 2021; 32:1267-1272. [PMID: 34184941 PMCID: PMC8351552 DOI: 10.1091/mbc.e20-10-0681] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
Collective cell migration is a widely observed phenomenon during animal development, tissue repair, and cancer metastasis. Considering its broad involvement in biological processes, it is essential to understand the basics behind the collective movement. Based on the topology of migrating populations, tissue-scale kinetics, called the “leader–follower” model, has been proposed for persistent directional collective movement. Extensive in vivo and in vitro studies reveal the characteristics of leader cells, as well as the special mechanisms leader cells employ for maintaining their positions in collective migration. However, follower cells have attracted increasing attention recently due to their important contributions to collective movement. In this Perspective, the current understanding of the molecular mechanisms behind the “leader–follower” model is reviewed with a special focus on the force transmission and diverse roles of leaders and followers during collective cell movement.
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Affiliation(s)
- Lei Qin
- Department of Orthopedics, Huazhong University of Science and Technology Union Shenzhen Hospital, Shenzhen, Guangdong, China.,Department of Biochemistry, School of Medicine, Southern University of Science and Technology, Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Shenzhen Key Laboratory of Cell Microenvironment, Shenzhen 518055, China
| | - Dazhi Yang
- Department of Orthopedics, Huazhong University of Science and Technology Union Shenzhen Hospital, Shenzhen, Guangdong, China
| | - Weihong Yi
- Department of Orthopedics, Huazhong University of Science and Technology Union Shenzhen Hospital, Shenzhen, Guangdong, China
| | - Huiling Cao
- Department of Biochemistry, School of Medicine, Southern University of Science and Technology, Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Shenzhen Key Laboratory of Cell Microenvironment, Shenzhen 518055, China
| | - Guozhi Xiao
- Department of Biochemistry, School of Medicine, Southern University of Science and Technology, Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Shenzhen Key Laboratory of Cell Microenvironment, Shenzhen 518055, China
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50
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Ikeuchi M, Yuki R, Saito Y, Nakayama Y. The tumor suppressor LATS2 reduces v-Src-induced membrane blebs in a kinase activity-independent manner. FASEB J 2021; 35:e21242. [PMID: 33368671 DOI: 10.1096/fj.202001909r] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Revised: 11/05/2020] [Accepted: 11/19/2020] [Indexed: 12/24/2022]
Abstract
When cells with excess DNA, such as tetraploid cells, undergo cell division, it can contribute to cellular transformation via asymmetrical chromosome segregation-generated genetic diversity. Cell cycle progression of tetraploid cells is suppressed by large tumor suppressor 2 (LATS2) kinase-induced inhibitory phosphorylation of the transcriptional coactivator Yes-associated protein (YAP). We recently reported that the oncogene v-Src induces tetraploidy and promotes cell cycle progression of tetraploid cells by suppressing LATS2 activity. We explore here the mechanism by which v-Src suppresses LATS2 activity and the role of LATS2 in v-Src-expressing cells. LATS2 was directly phosphorylated by v-Src and the proto-oncogene c-Src, resulting in decreased LATS2 kinase activity. This kinase-deficient LATS2 accumulated in a YAP transcriptional activity-dependent manner, and knockdown of either LATS2 or the LATS2-binding partner moesin-ezrin-radixin-like protein (Merlin) accelerated v-Src-induced membrane bleb formation. Upon v-Src expression, the interaction of Merlin with LATS2 was increased possibly due to a decrease in Merlin phosphorylation at Ser518, the dephosphorylation of which is required for the open conformation of Merlin and interaction with LATS2. LATS2 was colocalized with Merlin at the plasma membrane in a manner that depends on the Merlin-binding region of LATS2. The bleb formation in v-Src-expressing and LATS2-knockdown cells was rescued by the reexpression of wild-type or kinase-dead LATS2 but not the LATS2 mutant lacking the Merlin-binding region. These results suggest that the kinase-deficient LATS2 plays a role with Merlin at the plasma membrane in the maintenance of cortical rigidity in v-Src-expressing cells, which may cause tumor suppression.
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Affiliation(s)
- Masayoshi Ikeuchi
- Department of Biochemistry & Molecular Biology, Kyoto Pharmaceutical University, Kyoto, Japan.,DC1, Japan Society for the Promotion of Science, Tokyo, Japan
| | - Ryuzaburo Yuki
- Department of Biochemistry & Molecular Biology, Kyoto Pharmaceutical University, Kyoto, Japan
| | - Youhei Saito
- Department of Biochemistry & Molecular Biology, Kyoto Pharmaceutical University, Kyoto, Japan
| | - Yuji Nakayama
- Department of Biochemistry & Molecular Biology, Kyoto Pharmaceutical University, Kyoto, Japan
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