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Fujimoto Y, Nakazawa N. The roles of FHL2 as a mechanotransducer for cellular functions in the mechanical environment. Front Cell Dev Biol 2024; 12:1431690. [PMID: 39129787 PMCID: PMC11310055 DOI: 10.3389/fcell.2024.1431690] [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: 05/12/2024] [Accepted: 07/03/2024] [Indexed: 08/13/2024] Open
Abstract
The cell has multiple mechanisms for sensing and responding to dynamic changes in the mechanical environment. In the process, intracellular signaling is activated to modulate gene expression. Recent studies have shown that multifunctional signaling molecules that link intracellular force and gene expression are important for understanding cellular functions in the mechanical environment. This review discusses recent studies on one of the mechanotransducers, Four-and-a-half LIM domains 2 (FHL2), which localizes to focal adhesions (FAs), actin cytoskeleton, and nucleus. FHL2 localizes to FAs and the actin cytoskeleton in the cell on stiff substrate. In this situation, intracellular tension of F-actin by Myosin II is critical for FHL2 localization to FAs and actin stress fibers. In the case, a conserved phenylalanine in each LIM domain is responsible for its localization to F-actin. On the other hand, lower tension of F-actin in the cell on a soft substrate causes FHL2 to be released into the cytoplasm, resulting in its localization in the nucleus. At the molecular level, phosphorylation of specific tyrosine in FHL2 by FAK, non-receptor tyrosine kinase, is critical to nuclear localization. Finally, by binding to transcription factors, FHL2 modulates gene expression for cell proliferation as a transcriptional co-factor. Thus, FHL2 is involved in mechano-sensing and -transduction in the cell in a mechanical environment.
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Affiliation(s)
- Yukari Fujimoto
- Graduate School of Science and Engineering, Kindai University, Higashiosaka, Japan
| | - Naotaka Nakazawa
- Department of Energy and Materials, Faculty of Science and Engineering, Kindai University, Higashiosaka, Japan
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Sun L, Yu S, Xu H, Zheng Y, Lin J, Wu M, Wang J, Wang A, Lan Q, Furnari F, Cavenee W, Purow B, Li M. FHL2 interacts with EGFR to promote glioblastoma growth. Oncogene 2018; 37:1386-1398. [PMID: 29321665 DOI: 10.1038/s41388-017-0068-0] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2017] [Revised: 11/02/2017] [Accepted: 11/14/2017] [Indexed: 02/06/2023]
Abstract
Four-and-a-half LIM protein2 (FHL2) is a member of the LIM-only protein family, which plays a critical role in tumorigenesis. We previously reported that FHL2 is upregulated and plays an oncogenic role in glioblastoma (GBM), the most common and aggressive brain tumor. GBM is also marked by amplification of the epidermal growth factor receptor (EGFR) gene and its mutations, of which EGFRvIII is the most common and functionally significant. Here we report that FHL2 physically interacts with the wild-type EGFR and its mutated EGFRvIII form in GBM cells. Expression of FHL2 caused increased EGFR and EGFRvIII protein levels and this was due to an increase in protein stability rather than an increase in EGFR mRNA expression. In contrast, FHL2 knockdown using RNA interference reduced EGFR and EGFRvIII protein expression and the phosphorylation levels of EGFR and AKT. Consistent with these features, EGFR expression was significantly lower in mouse FHL2-null astrocytes, where reintroduction of FHL2 was able to restore EGFR levels. Using established GBM cell lines and patient-derived neurosphere lines, FHL2 silencing markedly induced cell apoptosis in EGFRvIII-positive cells. Targeting FHL2 significantly prevented EGFRvIII-positive GBM tumor growth in vivo. FHL2 expression also positively correlated with EGFR expression in GBM samples from patients. Taken together, our results demonstrate that FHL2 interacts with EGFR and EGFRvIII to increase their levels and this promotes glioma growth, representing a novel mechanism that may be therapeutically targetable.
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Affiliation(s)
- Lili Sun
- The Experimental Center, the Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Shuye Yu
- The Experimental Center, the Second Affiliated Hospital of Soochow University, Suzhou, China.,Department of Neurology, the Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Hui Xu
- The Experimental Center, the Second Affiliated Hospital of Soochow University, Suzhou, China.,Department of Neurosurgery, the Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Yanwen Zheng
- The Experimental Center, the Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Juntang Lin
- Stem Cells and Biotherapy Engineering Research Center of Henan, Xinxiang Medical University, Xinxiang, China
| | - Meiyan Wu
- Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Jide Wang
- Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Aidong Wang
- The Experimental Center, the Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Qing Lan
- Department of Neurosurgery, the Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Frank Furnari
- Ludwig Institute for Cancer Research, University of California, San Diego, CA, USA
| | - Webster Cavenee
- Ludwig Institute for Cancer Research, University of California, San Diego, CA, USA
| | - Benjamin Purow
- Department of Neurology, University of Virginia, Charlottesville, VA, USA
| | - Ming Li
- The Experimental Center, the Second Affiliated Hospital of Soochow University, Suzhou, China. .,Department of Neurosurgery, the Second Affiliated Hospital of Soochow University, Suzhou, China. .,Department of Neurology, University of Virginia, Charlottesville, VA, USA.
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Wang S, Lu Y, Sun X, Wu D, Fu B, Chen Y, Deng H, Chen X. Identification of common and differential mechanisms of glomerulus and tubule senescence in 24-month-old rats by quantitative LC-MS/MS. Proteomics 2016; 16:2706-2717. [PMID: 27452873 DOI: 10.1002/pmic.201600121] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2016] [Revised: 07/05/2016] [Accepted: 07/20/2016] [Indexed: 12/20/2022]
Affiliation(s)
- Shiyu Wang
- Department of Nephrology; Chinese PLA General Hospital; Chinese PLA Institute of Nephrology, Beijing Key Laboratory of Kidney Disease, State Key Laboratory of Kidney Diseases, National Clinical Research Center for Kidney Diseases; Beijing P.R. China
- Department of Nephrology; The Second Hospital of Jilin University; Changchun Jilin P.R. China
| | - Yang Lu
- Department of Nephrology; Chinese PLA General Hospital; Chinese PLA Institute of Nephrology, Beijing Key Laboratory of Kidney Disease, State Key Laboratory of Kidney Diseases, National Clinical Research Center for Kidney Diseases; Beijing P.R. China
| | - Xuefeng Sun
- Department of Nephrology; Chinese PLA General Hospital; Chinese PLA Institute of Nephrology, Beijing Key Laboratory of Kidney Disease, State Key Laboratory of Kidney Diseases, National Clinical Research Center for Kidney Diseases; Beijing P.R. China
| | - Di Wu
- Department of Nephrology; Chinese PLA General Hospital; Chinese PLA Institute of Nephrology, Beijing Key Laboratory of Kidney Disease, State Key Laboratory of Kidney Diseases, National Clinical Research Center for Kidney Diseases; Beijing P.R. China
| | - Bo Fu
- Department of Nephrology; Chinese PLA General Hospital; Chinese PLA Institute of Nephrology, Beijing Key Laboratory of Kidney Disease, State Key Laboratory of Kidney Diseases, National Clinical Research Center for Kidney Diseases; Beijing P.R. China
| | - Yuling Chen
- MOE Key Laboratory of Bioinformatics; School of Life Sciences; Tsinghua University; Beijing P.R. China
| | - Haiteng Deng
- MOE Key Laboratory of Bioinformatics; School of Life Sciences; Tsinghua University; Beijing P.R. China
| | - Xiangmei Chen
- Department of Nephrology; Chinese PLA General Hospital; Chinese PLA Institute of Nephrology, Beijing Key Laboratory of Kidney Disease, State Key Laboratory of Kidney Diseases, National Clinical Research Center for Kidney Diseases; Beijing P.R. China
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Zienert E, Eke I, Aust D, Cordes N. LIM-only protein FHL2 critically determines survival and radioresistance of pancreatic cancer cells. Cancer Lett 2015; 364:17-24. [PMID: 25917075 DOI: 10.1016/j.canlet.2015.04.019] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2015] [Revised: 04/17/2015] [Accepted: 04/19/2015] [Indexed: 11/27/2022]
Abstract
Numerous factors determine the current poor prognosis of pancreatic ductal adenocarcinoma (PDAC). One of the greatest challenges to overcome is treatment resistance. Among a large repertoire of intrinsic resistance mechanisms, integrin-mediated cell adhesion to extracellular matrix (ECM) has been identified to be fundamental. Coalesced in focal adhesion complexes, integrins, receptor tyrosine kinases, protein kinases and adapter proteins mediate prosurvival signaling. Four and a half LIM domains protein 2 (FHL2) is one of these adapter proteins, which operates through protein-protein interactions and shows tumor-specific expression. Based on this, we investigated FHL2 expression in PDAC specimens and three-dimensionally grown cell lines and how FHL2 mechanistically contributes to cell survival, cell cycling and radiation resistance. PDAC exhibited a significantly increased and heterogeneous FHL2 expression. Upon FHL2 depletion, pancreatic cancer cell lines showed significantly decreased cell survival, proliferation and radioresistance as well as enhanced apoptosis and MEK/ERK signaling and cyclin D1, E, A and B1 expression were strongly induced. Targeting of FHL2 and MEK1 was similarly effective than FHL2 depletion alone, suggesting MEK1 as a downstream signaling mediator of FHL2. Taken together, our results provide evidence for the importance of the focal adhesion protein FHL2 in pancreatic cancer cell survival, proliferation and radiosensitivity.
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Affiliation(s)
- Elisa Zienert
- OncoRay - National Center for Radiation Research in Oncology, Faculty of Medicine, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - Iris Eke
- OncoRay - National Center for Radiation Research in Oncology, Faculty of Medicine, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany; Department of Radiation Oncology, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - Daniela Aust
- Institute for Pathology, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - Nils Cordes
- OncoRay - National Center for Radiation Research in Oncology, Faculty of Medicine, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany; Institute of Radiooncology, Helmholtz-Zentrum Dresden - Rossendorf, Dresden, Germany; Department of Radiation Oncology, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany; German Cancer Consortium (DKTK), 01307 Dresden, Germany; German Cancer Research Center (DKFZ), Heidelberg, Germany.
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Duan L, Wang Z, Shen J, Shan Z, Shen X, Wu Y, Sun R, Li T, Yuan R, Zhao Q, Bai G, Gu Y, Jin L, Lei L. Comparison of reprogramming genes in induced pluripotent stem cells and nuclear transfer cloned embryos. Stem Cell Rev Rep 2014; 10:548-60. [PMID: 24828831 DOI: 10.1007/s12015-014-9516-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
The most effective reprogramming methods, somatic cell nuclear transfer (SCNT) and induced pluripotent stem cells (iPSCs), are widely used in biological research and regenerative medicine, yet the mechanism that reprograms somatic cells to totipotency remains unclear and thus reprogramming efficiency is still low. Microarray technology has been employed in analyzing the transcriptomes changes during iPS reprogramming. Unfortunately, it is difficult to obtain enough DNA from SCNT reconstructed embryos to take advantage of this technology. In this study, we aimed to identify critical genes from the transcriptional profile for iPS reprogramming and compared expression levels of these genes in SCNT reprogramming. By integrating gene expression information from microarray databases and published studies comparing somatic cells with either miPSCs or mouse embryonic stem cells (ESCs), we obtained two lists of co-upregulated genes. The gene ontology (GO) enriched analysis of these two lists demonstrated that the reprogramming process is associated with numerous biological processes. Specifically, we selected 32 genes related to heterochromatin, embryonic development, and cell cycle from our co-upregulated gene datasets and examined the gene expression level in iPSCs and SCNT embryos by qPCR. The results revealed that some reprogramming related genes in iPSCs were also expressed in SCNT reprogramming. We established the network of gene interactions that occur with genes differentially expressed in iPS and SCNT reprogramming and then performed GO analysis on the genes in the network. The network genes function in chromatin organization, heterochromatin, transcriptional regulation, and cell cycle. Further researches to improve reprogramming efficiency, especially in SCNT, will focus on functional studies of these selected genes.
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Affiliation(s)
- Lian Duan
- Department of Histology and Embryology, Harbin Medical University, 194 Xuefu Road, Harbin, China
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Nouët Y, Dahan J, Labalette C, Levillayer F, Julien B, Jouvion G, Cairo S, Vives FL, Ribeiro A, Huerre M, Colnot S, Perret C, Nhieu JTV, Tordjmann T, Buendia MA, Wei Y. The four and a half LIM-only protein 2 regulates liver homeostasis and contributes to carcinogenesis. J Hepatol 2012; 57:1029-36. [PMID: 22796152 DOI: 10.1016/j.jhep.2012.06.035] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/22/2011] [Revised: 06/26/2012] [Accepted: 06/27/2012] [Indexed: 12/30/2022]
Abstract
BACKGROUND & AIMS The four and a half LIM-only protein 2 (FHL2) is upregulated in diverse pathological conditions. Here, we analyzed the effects of FHL2 overexpression in the liver of FHL2 transgenic mice (Apo-FHL2). METHODS We first examined cell proliferation and apoptosis in Apo-FHL2 livers and performed partial hepatectomy to investigate high FHL2 expression in liver regeneration. Expression of FHL2 was then analyzed by real time PCR in human hepatocellular carcinoma and adjacent non-tumorous livers. Finally, the role of FHL2 in hepatocarcinogenesis was assessed using Apo-FHL2;Apc(lox/lox) mice. RESULTS Six-fold increase in cell proliferation in transgenic livers was associated with concomitant apoptosis, resulting in normal liver mass. In Apo-FHL2 livers, both cyclin D1 and p53 were markedly increased. Evidence supporting a p53-dependent cell death mechanism was provided by the findings that FHL2 bound to and activated the p53 promoter, and that a dominant negative p53 mutant compromised FHL2-induced apoptosis in hepatic cells. Following partial hepatectomy in Apo-FHL2 mice, hepatocytes displayed advanced G1 phase entry and DNA synthesis leading to accelerated liver weight restoration. Interestingly, FHL2 upregulation in human liver specimens showed significant association with increasing inflammation score and cirrhosis. Finally, while Apo-FHL2 mice developed no tumors, the FHL2 transgene enhanced hepatocarcinogenesis induced by liver-specific deletion of the adenomatous polyposis coli gene and aberrant Wnt/β-catenin signaling in Apc(lox/lox) animals. CONCLUSIONS Our results implicate FHL2 in the regulation of signaling pathways that couple proliferation and cell death machineries, and underscore the important role of FHL2 in liver homeostasis and carcinogenesis.
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Affiliation(s)
- Yann Nouët
- Institut Pasteur, Unité d'Oncogenèse et Virologie Moléculaire, France
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Zhang W, Jiang B, Guo Z, Sardet C, Zou B, Lam CSC, Li J, He M, Lan HY, Pang R, Hung IFN, Tan VPY, Wang J, Wong BCY. Four-and-a-half LIM protein 2 promotes invasive potential and epithelial-mesenchymal transition in colon cancer. Carcinogenesis 2010; 31:1220-9. [DOI: 10.1093/carcin/bgq094] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
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Labalette C, Nouët Y, Levillayer F, Colnot S, Chen J, Claude V, Huerre M, Perret C, Buendia MA, Wei Y. Deficiency of the LIM-only protein FHL2 reduces intestinal tumorigenesis in Apc mutant mice. PLoS One 2010; 5:e10371. [PMID: 20442768 PMCID: PMC2860980 DOI: 10.1371/journal.pone.0010371] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2009] [Accepted: 03/17/2010] [Indexed: 11/18/2022] Open
Abstract
Background The four and a half LIM-only protein 2 (FHL2) is capable of shuttling between focal adhesion and nucleus where it signals through direct interaction with a number of proteins including β-catenin. Although FHL2 activation has been found in various human cancers, evidence of its functional contribution to carcinogenesis has been lacking. Methodology/Principal Findings Here we have investigated the role of FHL2 in intestinal tumorigenesis in which activation of the Wnt pathway by mutations in the adenomatous polyposis coli gene (Apc) or in β-catenin constitutes the primary transforming event. In this murine model, introduction of a biallelic deletion of FHL2 into mutant ApcΔ14/+ mice substantially reduces the number of intestinal adenomas but not tumor growth, suggesting a role of FHL2 in the initial steps of tumorigenesis. In the lesions, Wnt signalling is not affected by FHL2 deficiency, remaining constitutively active. Nevertheless, loss of FHL2 activity is associated with increased epithelial cell migration in intestinal epithelium, which might allow to eliminate more efficiently deleterious cells and reduce the risk of tumorigenesis. This finding may provide a mechanistic basis for tumor suppression by FHL2 deficiency. In human colorectal carcinoma but not in low-grade dysplasia, we detected up-regulation and enhanced nuclear localization of FHL2, indicating the activation of FHL2 during the development of malignancy. Conclusions/Significance Our data demonstrate that FHL2 represents a critical factor in intestinal tumorigenesis.
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Affiliation(s)
- Charlotte Labalette
- Département de Virologie, Institut Pasteur, Paris, France
- Inserm U579, Paris, France
| | - Yann Nouët
- Département de Virologie, Institut Pasteur, Paris, France
- Inserm U579, Paris, France
| | - Florence Levillayer
- Département de Virologie, Institut Pasteur, Paris, France
- Inserm U579, Paris, France
| | - Sabine Colnot
- Département d'Endocrinologie Métabolisme et Cancer, Institut Cochin, Paris, France
- Inserm U567, Paris, France
| | - Ju Chen
- Department of Medicine, University of California San Diego, La Jolla, California, United States of America
| | - Valere Claude
- Département d'Anapathologie, Hôpital Bégin, Saint Mandé, France
| | - Michel Huerre
- Département d'Infection et Epidémiologie, Institut Pasteur, Paris, France
| | - Christine Perret
- Département d'Endocrinologie Métabolisme et Cancer, Institut Cochin, Paris, France
- Inserm U567, Paris, France
| | - Marie-Annick Buendia
- Département de Virologie, Institut Pasteur, Paris, France
- Inserm U579, Paris, France
| | - Yu Wei
- Département de Virologie, Institut Pasteur, Paris, France
- Inserm U579, Paris, France
- * E-mail:
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