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Zhou ZY, Liu L, Song XM. Identification of RAS-like oncoprotein B (RALB) as a potential prognostic and therapeutic target in head and neck squamous cell carcinoma. Am J Transl Res 2024; 16:3950-3963. [PMID: 39262725 PMCID: PMC11384417 DOI: 10.62347/ndfc4209] [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: 04/28/2024] [Accepted: 07/01/2024] [Indexed: 09/13/2024]
Abstract
BACKGROUND/PURPOSE The RAS superfamily oncogenes play significant roles in various types of malignant tumors. However, little is known about the role of RAS-like oncoprotein B (RALB) in head and neck squamous cell carcinoma (HNSCC). This study evaluated whether RALB can be a prognostic and therapeutic target for HNSCC. MATERIALS AND METHODS A total of 504 HNSCC samples from The Cancer Genome Atlas database were segregated into two groups: RALB-high and RALB-low. The clinical significance of RALB expression in HNSCC patients was investigated. Cell proliferation, migration, and invasion assays were performed in HN-1 and HN-5 cells by silencing RALB using siRNA. Gene enrichment and immune infiltration analyses were also performed. RESULTS RALB expression was elevated in HNSCC tissues compared with normal tissues and was an independent risk factor associated with poor prognosis. A nomogram including the RALB expression level was established to predict the prognosis of HNSCC patients and showed highest sensitivity and benefit in predicting the three-year survival. The inhibition of RALB expression effectively impeded the proliferation, invasion, and migration of HNSCC cells. Importantly, RALB levels were significantly correlated with T cell-mediated immune responses, especially in human papillomavirus-positive HNSCC samples. CONCLUSION This study identified RALB as a potential prognostic and therapeutic target for HNSCC, and provided insight into the relationship between RALB and revealed an innovative strategy for HNSCC immunotherapy.
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Affiliation(s)
- Zi-Yuan Zhou
- Department of Oral and Maxillofacial Surgery, Affiliated Hospital of Stomatology, Nanjing Medical University Nanjing, Jiangsu, China
- Jiangsu Key Laboratory of Oral Diseases, Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing Medical University Nanjing, Jiangsu, China
| | - Lei Liu
- Department of Orthopedics, The Affiliated Yixing Hospital of Jiangsu University Yixing, Jiangsu, China
| | - Xiao-Meng Song
- Department of Oral and Maxillofacial Surgery, Affiliated Hospital of Stomatology, Nanjing Medical University Nanjing, Jiangsu, China
- Jiangsu Key Laboratory of Oral Diseases, Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing Medical University Nanjing, Jiangsu, China
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2
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Brosseau S, Abreu P, Bouchez C, Charon L, Kieffer Y, Gentric G, Picant V, Veith I, Camonis J, Descroix S, Mechta-Grigoriou F, Parrini MC, Zalcman G. YAP/TEAD involvement in resistance to paclitaxel chemotherapy in lung cancer. Mol Cell Biochem 2024:10.1007/s11010-024-04949-7. [PMID: 38427166 DOI: 10.1007/s11010-024-04949-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2023] [Accepted: 01/23/2024] [Indexed: 03/02/2024]
Abstract
The Yes-associated protein (YAP) oncoprotein has been linked to both metastases and resistance to targeted therapy of lung cancer cells. We aimed to investigate the effect of YAP pharmacological inhibition, using YAP/TEA domain (TEAD) transcription factor interaction inhibitors in chemo-resistant lung cancer cells. YAP subcellular localization, as a readout for YAP activation, cell migration, and TEAD transcription factor functional transcriptional activity were investigated in cancer cell lines with up-regulated YAP, with and without YAP/TEAD interaction inhibitors. Parental (A549) and paclitaxel-resistant (A549R) cell transcriptomes were analyzed. The half-maximal inhibitory concentration (IC50) of paclitaxel or trametinib, which are Mitogen-Activated protein kinase and Erk Kinase (MEK) inhibitors, combined with a YAP/TEAD inhibitor (IV#6), was determined. A three-dimensional (3D) microfluidic culture device enabled us to study the effect of IV#6/paclitaxel combination on cancer cells isolated from fresh resected lung cancer samples. YAP activity was significantly higher in paclitaxel-resistant cell lines. The YAP/TEAD inhibitor induced a decreased YAP activity in A549, PC9, and H2052 cells, with reduced YAP nuclear staining. Wound healing assays upon YAP inhibition revealed impaired cell motility of lung cancer A549 and mesothelioma H2052 cells. Combining YAP pharmacological inhibition with trametinib in K-Ras mutated A549 cells recapitulated synthetic lethality, thereby sensitizing these cells to MEK inhibition. The YAP/TEAD inhibitor lowered the IC50 of paclitaxel in A549R cells. Differential transcriptomic analysis of parental and A549R cells revealed an increased YAP/TEAD transcriptomic signature in resistant cells, downregulated upon YAP inhibition. The YAP/TEAD inhibitor restored paclitaxel sensitivity of A549R cells cultured in a 3D microfluidic system, with lung cancer cells from a fresh tumor efficiently killed by YAP/TEAD inhibitor/paclitaxel doublet. Evidence of the YAP/TEAD transcriptional program's role in chemotherapy resistance paves the way for YAP therapeutic targeting.
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Affiliation(s)
- S Brosseau
- U830 INSERM "Cancer, Heterogenity, Instability, Plasticity", Team "Stress and Cancer", Institut Curie Research Centre, 26 rue d'Ulm, 75248 Cedex 05, Paris, France
- Medicine Faculty, Université Paris Cité, 26 rue Henri Henri Huchard, 75018, Paris, France
- Thoracic Oncology Department, Clinical Investigation Centre (CIC) 1425 INSERM, Hôpital Bichat-Claude Bernard, Assistance Publique-Hôpitaux de Paris (AP-HP), 46 rue Henri Huchard, 75018, Paris, France
| | - P Abreu
- U830 INSERM "Cancer, Heterogenity, Instability, Plasticity", Team "Stress and Cancer", Institut Curie Research Centre, 26 rue d'Ulm, 75248 Cedex 05, Paris, France
| | - C Bouchez
- U830 INSERM "Cancer, Heterogenity, Instability, Plasticity", Team "Stress and Cancer", Institut Curie Research Centre, 26 rue d'Ulm, 75248 Cedex 05, Paris, France
| | - L Charon
- U830 INSERM "Cancer, Heterogenity, Instability, Plasticity", Team "Stress and Cancer", Institut Curie Research Centre, 26 rue d'Ulm, 75248 Cedex 05, Paris, France
| | - Y Kieffer
- U830 INSERM "Cancer, Heterogenity, Instability, Plasticity", Team "Stress and Cancer", Institut Curie Research Centre, 26 rue d'Ulm, 75248 Cedex 05, Paris, France
- PSL Research University, Paris, France
| | - G Gentric
- U830 INSERM "Cancer, Heterogenity, Instability, Plasticity", Team "Stress and Cancer", Institut Curie Research Centre, 26 rue d'Ulm, 75248 Cedex 05, Paris, France
- PSL Research University, Paris, France
| | - V Picant
- U830 INSERM "Cancer, Heterogenity, Instability, Plasticity", Team "Stress and Cancer", Institut Curie Research Centre, 26 rue d'Ulm, 75248 Cedex 05, Paris, France
- PSL Research University, Paris, France
| | - I Veith
- U830 INSERM "Cancer, Heterogenity, Instability, Plasticity", Team "Stress and Cancer", Institut Curie Research Centre, 26 rue d'Ulm, 75248 Cedex 05, Paris, France
- PSL Research University, Paris, France
| | - J Camonis
- U830 INSERM "Cancer, Heterogenity, Instability, Plasticity", Team "Stress and Cancer", Institut Curie Research Centre, 26 rue d'Ulm, 75248 Cedex 05, Paris, France
- PSL Research University, Paris, France
| | - S Descroix
- PSL Research University, Paris, France
- UMR 168 CNRS "Physics and Chemistry Curie" Institut Curie Research Centre, 26 rue d'Ulm, 75248 Cedex 05, Paris, France
| | - F Mechta-Grigoriou
- U830 INSERM "Cancer, Heterogenity, Instability, Plasticity", Team "Stress and Cancer", Institut Curie Research Centre, 26 rue d'Ulm, 75248 Cedex 05, Paris, France
- PSL Research University, Paris, France
| | - M C Parrini
- U830 INSERM "Cancer, Heterogenity, Instability, Plasticity", Team "Stress and Cancer", Institut Curie Research Centre, 26 rue d'Ulm, 75248 Cedex 05, Paris, France
- PSL Research University, Paris, France
| | - G Zalcman
- U830 INSERM "Cancer, Heterogenity, Instability, Plasticity", Team "Stress and Cancer", Institut Curie Research Centre, 26 rue d'Ulm, 75248 Cedex 05, Paris, France.
- Medicine Faculty, Université Paris Cité, 26 rue Henri Henri Huchard, 75018, Paris, France.
- Thoracic Oncology Department, Clinical Investigation Centre (CIC) 1425 INSERM, Hôpital Bichat-Claude Bernard, Assistance Publique-Hôpitaux de Paris (AP-HP), 46 rue Henri Huchard, 75018, Paris, France.
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Therapeutic Validation of GEF-H1 Using a De Novo Designed Inhibitor in Models of Retinal Disease. Cells 2022; 11:cells11111733. [PMID: 35681428 PMCID: PMC9179336 DOI: 10.3390/cells11111733] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Revised: 05/19/2022] [Accepted: 05/21/2022] [Indexed: 02/05/2023] Open
Abstract
Inflammation and fibrosis are important components of diseases that contribute to the malfunction of epithelia and endothelia. The Rho guanine nucleotide exchange factor (GEF) GEF-H1/ARHGEF-2 is induced in disease and stimulates inflammatory and fibrotic processes, cell migration, and metastasis. Here, we have generated peptide inhibitors to block the function of GEF-H1. Inhibitors were designed using a structural in silico approach or by isolating an inhibitory sequence from the autoregulatory C-terminal domain. Candidate inhibitors were tested for their ability to block RhoA/GEF-H1 binding in vitro, and their potency and specificity in cell-based assays. Successful inhibitors were then evaluated in models of TGFβ-induced fibrosis, LPS-stimulated endothelial cell-cell junction disruption, and cell migration. Finally, the most potent inhibitor was successfully tested in an experimental retinal disease mouse model, in which it inhibited blood vessel leakage and ameliorated retinal inflammation when treatment was initiated after disease diagnosis. Thus, an antagonist that blocks GEF-H1 signaling effectively inhibits disease features in in vitro and in vivo disease models, demonstrating that GEF-H1 is an effective therapeutic target and establishing a new therapeutic approach.
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Richardson DS, Spehar JM, Han DT, Chakravarthy PA, Sizemore ST. The RAL Enigma: Distinct Roles of RALA and RALB in Cancer. Cells 2022; 11:cells11101645. [PMID: 35626682 PMCID: PMC9139244 DOI: 10.3390/cells11101645] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Revised: 04/29/2022] [Accepted: 05/05/2022] [Indexed: 11/16/2022] Open
Abstract
RALA and RALB are highly homologous small G proteins belonging to the RAS superfamily. Like other small GTPases, the RALs are molecular switches that can be toggled between inactive GDP-bound and active GTP-bound states to regulate diverse and critical cellular functions such as vesicle trafficking, filopodia formation, mitochondrial fission, and cytokinesis. The RAL paralogs are activated and inactivated by a shared set of guanine nucleotide exchange factors (GEFs) and GTPase-activating proteins (GAPs) and utilize similar sets of downstream effectors. In addition to their important roles in normal cell biology, the RALs are known to be critical mediators of cancer cell survival, invasion, migration, and metastasis. However, despite their substantial similarities, the RALs often display striking functional disparities in cancer. RALA and RALB can have redundant, unique, or even antagonistic functions depending on cancer type. The molecular basis for these discrepancies remains an important unanswered question in the field of cancer biology. In this review we examine the functions of the RAL paralogs in normal cellular physiology and cancer biology with special consideration provided to situations where the roles of RALA and RALB are non-redundant.
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Physical Forces in Glioblastoma Migration: A Systematic Review. Int J Mol Sci 2022; 23:ijms23074055. [PMID: 35409420 PMCID: PMC9000211 DOI: 10.3390/ijms23074055] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Revised: 03/31/2022] [Accepted: 04/04/2022] [Indexed: 02/01/2023] Open
Abstract
The invasive capabilities of glioblastoma (GBM) define the cancer’s aggressiveness, treatment resistance, and overall mortality. The tumor microenvironment influences the molecular behavior of cells, both epigenetically and genetically. Current forces being studied include properties of the extracellular matrix (ECM), such as stiffness and “sensing” capabilities. There is currently limited data on the physical forces in GBM—both relating to how they influence their environment and how their environment influences them. This review outlines the advances that have been made in the field. It is our hope that further investigation of the physical forces involved in GBM will highlight new therapeutic options and increase patient survival. A search of the PubMed database was conducted through to 23 March 2022 with the following search terms: (glioblastoma) AND (physical forces OR pressure OR shear forces OR compression OR tension OR torsion) AND (migration OR invasion). Our review yielded 11 external/applied/mechanical forces and 2 tumor microenvironment (TME) forces that affect the ability of GBM to locally migrate and invade. Both external forces and forces within the tumor microenvironment have been implicated in GBM migration, invasion, and treatment resistance. We endorse further research in this area to target the physical forces affecting the migration and invasion of GBM.
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Liu S, Shi C, Wang X, Ma X, Gao P. Low expression of RalGAPs associates with the poorer overall survival of head and neck squamous cell carcinoma. Transl Cancer Res 2022; 10:5085-5094. [PMID: 35116360 PMCID: PMC8799020 DOI: 10.21037/tcr-21-1489] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Accepted: 11/18/2021] [Indexed: 02/05/2023]
Abstract
Background The role of Ral and RalGAPs on the progression of head and neck squamous cell carcinoma (HNSC) remains unclear. Methods The predesigned siRNAs against RalGAPs were transfected into cells to evaluate the effect on RalA activation. The Data from TCGA and GTEx were combined to analyze the pan-cancer gene expression of RalA and RalGAPs in cancer and adjacent normal tissues. Kaplan-Meier analysis was used to assess the predictive value of RalA and RalGAPs expression on the overall survival of patients with HNSC. Methylation-specific PCR in vitro and next-generation bisulfite sequencing in vivo were used to evaluate the association between DNA methylation and the down-regulation of RalGAPs. Results RalGAPs negatively regulated RalA activation. HNSC patients with low level of RalGAPα2 had worse overall survival. The promoter of RalGAPα2 was widely methylated in comparison to RalGAPα1 and the DNA methylation level of RalGAPα2 promoter was increased in HNSC tissues and associated with the presence of neck lymph node metastasis. Conclusions RalA and RalGAPs could act as a specific predictor to assess the prognosis of HNSC. DNA methylation might be a potential mechanism that downregulated the RalGAPα2 expression.
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Affiliation(s)
- Shan Liu
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Department of Head and Neck Oncology, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Congyu Shi
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Department of Head and Neck Oncology, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Xiaoyi Wang
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Department of Head and Neck Oncology, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Xiangrui Ma
- Department of Oral and Maxillofacial Surgery, Binzhou Medical University Hospital, Binzhou, China
| | - Pan Gao
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Department of General and Emergency Dentistry, West China Hospital of Stomatology, Sichuan University, Chengdu, China
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Singh MK, Zago G, Veith I, Camonis J, Coppey M, Parrini MC. Autophagy Is Polarized toward Cell Front during Migration and Spatially Perturbed by Oncogenic Ras. Cells 2021; 10:cells10102637. [PMID: 34685617 PMCID: PMC8534269 DOI: 10.3390/cells10102637] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Revised: 09/27/2021] [Accepted: 09/28/2021] [Indexed: 01/18/2023] Open
Abstract
Autophagy is a physiological degradation process that removes unnecessary or dysfunctional components of cells. It is important for normal cellular homeostasis and as a response to a variety of stresses, such as nutrient deprivation. Defects in autophagy have been linked to numerous human diseases, including cancers. Cancer cells require autophagy to migrate and to invade. Here, we study the intracellular topology of this interplay between autophagy and cell migration by an interdisciplinary live imaging approach which combines micro-patterning techniques and an autophagy reporter (RFP-GFP-LC3) to monitor over time, during directed migration, the back–front spatial distribution of LC3-positive compartments (autophagosomes and autolysosomes). Moreover, by exploiting a genetically controlled cell model, we assessed the impact of transformation by the Ras oncogene, one of the most frequently mutated genes in human cancers, which is known to increase both cell motility and basal autophagy. Static cells displayed an isotropic distribution of autophagy LC3-positive compartments. Directed migration globally increased autophagy and polarized both autophagosomes and autolysosomes at the front of the nucleus of migrating cells. In Ras-transformed cells, the front polarization of LC3 compartments was much less organized, spatially and temporally, as compared to normal cells. This might be a consequence of altered lysosome positioning. In conclusion, this work reveals that autophagy organelles are polarized toward the cell front during migration and that their spatial-temporal dynamics are altered in motile cancer cells that express an oncogenic Ras protein.
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Affiliation(s)
- Manish Kumar Singh
- Institut Curie, Centre de Recherche, Paris Sciences et Lettres Research University, 75005 Paris, France; (M.K.S.); (G.Z.); (I.V.); (J.C.); (M.C.)
- Institut National de la Santé et de la Recherche Médicale (INSERM), U830, 75005 Paris, France
| | - Giulia Zago
- Institut Curie, Centre de Recherche, Paris Sciences et Lettres Research University, 75005 Paris, France; (M.K.S.); (G.Z.); (I.V.); (J.C.); (M.C.)
- Institut National de la Santé et de la Recherche Médicale (INSERM), U830, 75005 Paris, France
| | - Irina Veith
- Institut Curie, Centre de Recherche, Paris Sciences et Lettres Research University, 75005 Paris, France; (M.K.S.); (G.Z.); (I.V.); (J.C.); (M.C.)
- Institut National de la Santé et de la Recherche Médicale (INSERM), U830, 75005 Paris, France
| | - Jacques Camonis
- Institut Curie, Centre de Recherche, Paris Sciences et Lettres Research University, 75005 Paris, France; (M.K.S.); (G.Z.); (I.V.); (J.C.); (M.C.)
- Institut National de la Santé et de la Recherche Médicale (INSERM), U830, 75005 Paris, France
| | - Mathieu Coppey
- Institut Curie, Centre de Recherche, Paris Sciences et Lettres Research University, 75005 Paris, France; (M.K.S.); (G.Z.); (I.V.); (J.C.); (M.C.)
- Centre National de la Recherche Scientifique (CNRS), UMR168, Sorbonne University, 75005 Paris, France
| | - Maria Carla Parrini
- Institut Curie, Centre de Recherche, Paris Sciences et Lettres Research University, 75005 Paris, France; (M.K.S.); (G.Z.); (I.V.); (J.C.); (M.C.)
- Institut National de la Santé et de la Recherche Médicale (INSERM), U830, 75005 Paris, France
- Correspondence: ; Tel.: +33-(0)-156-246-643
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Soriano O, Alcón-Pérez M, Vicente-Manzanares M, Castellano E. The Crossroads between RAS and RHO Signaling Pathways in Cellular Transformation, Motility and Contraction. Genes (Basel) 2021; 12:genes12060819. [PMID: 34071831 PMCID: PMC8229961 DOI: 10.3390/genes12060819] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Revised: 05/25/2021] [Accepted: 05/26/2021] [Indexed: 02/07/2023] Open
Abstract
Ras and Rho proteins are GTP-regulated molecular switches that control multiple signaling pathways in eukaryotic cells. Ras was among the first identified oncogenes, and it appears mutated in many forms of human cancer. It mainly promotes proliferation and survival through the MAPK pathway and the PI3K/AKT pathways, respectively. However, the myriad proteins close to the plasma membrane that activate or inhibit Ras make it a major regulator of many apparently unrelated pathways. On the other hand, Rho is weakly oncogenic by itself, but it critically regulates microfilament dynamics; that is, actin polymerization, disassembly and contraction. Polymerization is driven mainly by the Arp2/3 complex and formins, whereas contraction depends on myosin mini-filament assembly and activity. These two pathways intersect at numerous points: from Ras-dependent triggering of Rho activators, some of which act through PI3K, to mechanical feedback driven by actomyosin action. Here, we describe the main points of connection between the Ras and Rho pathways as they coordinately drive oncogenic transformation. We emphasize the biochemical crosstalk that drives actomyosin contraction driven by Ras in a Rho-dependent manner. We also describe possible routes of mechanical feedback through which myosin II activation may control Ras/Rho activation.
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Affiliation(s)
- Olga Soriano
- Tumor Biophysics Laboratory, Centro de Investigación del Cáncer and Instituto de Biología Molecular y Celular del Cáncer, Consejo Superior de Investigaciones Científicas (CSIC)-University of Salamanca, 37007 Salamanca, Spain;
| | - Marta Alcón-Pérez
- Tumour-Stroma Signalling Laboratory, Centro de Investigación del Cáncer and Instituto de Biología Molecular y Celular del Cáncer, Consejo Superior de Investigaciones Científicas (CSIC)-University of Salamanca, 37007 Salamanca, Spain;
| | - Miguel Vicente-Manzanares
- Tumor Biophysics Laboratory, Centro de Investigación del Cáncer and Instituto de Biología Molecular y Celular del Cáncer, Consejo Superior de Investigaciones Científicas (CSIC)-University of Salamanca, 37007 Salamanca, Spain;
- Correspondence: (M.V.-M.); (E.C.)
| | - Esther Castellano
- Tumour-Stroma Signalling Laboratory, Centro de Investigación del Cáncer and Instituto de Biología Molecular y Celular del Cáncer, Consejo Superior de Investigaciones Científicas (CSIC)-University of Salamanca, 37007 Salamanca, Spain;
- Correspondence: (M.V.-M.); (E.C.)
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Joo E, Olson MF. Regulation and functions of the RhoA regulatory guanine nucleotide exchange factor GEF-H1. Small GTPases 2020; 12:358-371. [PMID: 33126816 PMCID: PMC8583009 DOI: 10.1080/21541248.2020.1840889] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Since the discovery by Madaule and Axel in 1985 of the first Ras homologue (Rho) protein in Aplysia and its human orthologue RhoB, membership in the Rho GTPase family has grown to 20 proteins, with representatives in all eukaryotic species. These GTPases are molecular switches that cycle between active (GTP bound) and inactivate (GDP bound) states. The exchange of GDP for GTP on Rho GTPases is facilitated by guanine exchange factors (GEFs). Approximately 80 Rho GEFs have been identified to date, and only a few GEFs associate with microtubules. The guanine nucleotide exchange factor H1, GEF-H1, is a unique GEF that associates with microtubules and is regulated by the polymerization state of microtubule networks. This review summarizes the regulation and functions of GEF-H1 and discusses the roles of GEF-H1 in human diseases.
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Affiliation(s)
- Emily Joo
- Department of Chemistry and Biology, Ryerson University, Toronto, ON, Canada
| | - Michael F Olson
- Department of Chemistry and Biology, Ryerson University, Toronto, ON, Canada
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Pan M, Chew TW, Wong DCP, Xiao J, Ong HT, Chin JFL, Low BC. BNIP-2 retards breast cancer cell migration by coupling microtubule-mediated GEF-H1 and RhoA activation. SCIENCE ADVANCES 2020; 6:eaaz1534. [PMID: 32789168 PMCID: PMC7399486 DOI: 10.1126/sciadv.aaz1534] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Accepted: 06/18/2020] [Indexed: 06/11/2023]
Abstract
Microtubules display dynamic turnover during cell migration, leading to cell contractility and focal adhesion maturation regulated by Rho guanosine triphosphatase activity. This interplay between microtubules and actomyosin is mediated by guanine nucleotide exchange factor (GEF)-H1 released after microtubule depolymerization or microtubule disconnection from focal adhesions. However, how GEF-H1 activates Rho upon microtubule disassembly remains elusive. Here, we found that BNIP-2, a BCH domain-containing protein that binds both RhoA and GEF-H1 and traffics with kinesin-1 on microtubules, is important for GEF-H1-driven RhoA activation upon microtubule disassembly. Depletion of BNIP-2 in MDA-MB-231 breast cancer cells decreases RhoA activity and promotes cell migration. Upon nocodazole-induced microtubule disassembly, the interaction between BNIP-2 and GEF-H1 increases, while knockdown of BNIP-2 reduces RhoA activation and cell rounding via uncoupling RhoA-GEF-H1 interaction. Together, these findings revealed that BNIP-2 couples microtubules and focal adhesions via scaffolding GEF-H1 and RhoA, fine-tuning RhoA activity and cell migration.
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Affiliation(s)
- Meng Pan
- Mechanobiology Institute, 5A Engineering Drive 1, National University of Singapore, Singapore 117411, Singapore
| | - Ti Weng Chew
- Mechanobiology Institute, 5A Engineering Drive 1, National University of Singapore, Singapore 117411, Singapore
| | - Darren Chen Pei Wong
- Mechanobiology Institute, 5A Engineering Drive 1, National University of Singapore, Singapore 117411, Singapore
| | - Jingwei Xiao
- Mechanobiology Institute, 5A Engineering Drive 1, National University of Singapore, Singapore 117411, Singapore
| | - Hui Ting Ong
- Mechanobiology Institute, 5A Engineering Drive 1, National University of Singapore, Singapore 117411, Singapore
| | - Jasmine Fei Li Chin
- Mechanobiology Institute, 5A Engineering Drive 1, National University of Singapore, Singapore 117411, Singapore
| | - Boon Chuan Low
- Mechanobiology Institute, 5A Engineering Drive 1, National University of Singapore, Singapore 117411, Singapore
- Department of Biological Sciences, 14 Science Drive 4, National University of Singapore, Singapore 117543, Singapore
- University Scholars Programme, 18 College Avenue East, Singapore 138593, Singapore
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Qian X, Zhou X, Shentu P, Yao Y, Jiao D, Chen Q, Zhou J, Xu Y. Sec3 knockdown inhibits TGF-β induced epithelial-mesenchymal transition through the down-regulation of Akt phosphorylation in A549 cells. Biochem Biophys Res Commun 2019; 519:253-260. [PMID: 31495494 DOI: 10.1016/j.bbrc.2019.08.145] [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: 08/06/2019] [Accepted: 08/26/2019] [Indexed: 11/17/2022]
Abstract
The exocyst, an evolutionarily conserved octomeric protein complex, has been demonstrated as an essential component for vesicle tethering during cell exocytosis, and participates in various physiological processes in the cell. Although subunits of the exocyst complex have been reported to be involved in the regulation of TGF-β induced cancer cell migration and epithelial-mesenchymal transition (EMT), the potential function of Sec3 in these regulated processes remains unclear. Here, we show that Sec3 knockdown abolishes TGF-β stimulated A549 lung cancer cell migration in vitro and causes defects in the regulated EMT process. In addition, we find that depletion of Sec3 significantly inhibits TGF-β stimulated Akt phosphorylation in A549 cells, whereas the increase of Smad2 phosphorylation is unaffected. Furthermore, replenishment of an RNAi-resistant form of Sec3 is shown to restore the defects of TGF-β induced cell migration, EMT and Akt signaling activation. In summary, our study provides evidence that Sec3 is involved in TGF-β induced cell migration and EMT processes, presumably through the regulation of PI3K/Akt signaling activation in A549 cancer cells.
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Affiliation(s)
- Xiaohan Qian
- Department of Biomedical Engineering, Key Laboratory of Biomedical Engineering of Ministry of Education, Zhejiang Provincial Key Laboratory of Cardio-Cerebral Vascular Detection Technology and Medicinal Effectiveness Appraisal, Zhejiang University, Hangzhou, 310027, China; Department of Respiratory Disease, Thoracic Disease Center, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, 310003, China
| | - Xiaoxu Zhou
- Department of Biomedical Engineering, Key Laboratory of Biomedical Engineering of Ministry of Education, Zhejiang Provincial Key Laboratory of Cardio-Cerebral Vascular Detection Technology and Medicinal Effectiveness Appraisal, Zhejiang University, Hangzhou, 310027, China
| | - Ping Shentu
- Department of Biomedical Engineering, Key Laboratory of Biomedical Engineering of Ministry of Education, Zhejiang Provincial Key Laboratory of Cardio-Cerebral Vascular Detection Technology and Medicinal Effectiveness Appraisal, Zhejiang University, Hangzhou, 310027, China
| | - Yuanfa Yao
- Department of Biomedical Engineering, Key Laboratory of Biomedical Engineering of Ministry of Education, Zhejiang Provincial Key Laboratory of Cardio-Cerebral Vascular Detection Technology and Medicinal Effectiveness Appraisal, Zhejiang University, Hangzhou, 310027, China
| | - Demin Jiao
- Department of Respiratory Oncology, The 903rd Hospital of PLA, Hangzhou, 310013, China
| | - Qingyong Chen
- Department of Respiratory Oncology, The 903rd Hospital of PLA, Hangzhou, 310013, China
| | - Jianying Zhou
- Department of Respiratory Disease, Thoracic Disease Center, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, 310003, China
| | - Yingke Xu
- Department of Biomedical Engineering, Key Laboratory of Biomedical Engineering of Ministry of Education, Zhejiang Provincial Key Laboratory of Cardio-Cerebral Vascular Detection Technology and Medicinal Effectiveness Appraisal, Zhejiang University, Hangzhou, 310027, China; Department of Endocrinology, The Affiliated Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, 310016, China.
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12
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Méhes E, Biri-Kovács B, Isai DG, Gulyás M, Nyitray L, Czirók A. Matrigel patterning reflects multicellular contractility. PLoS Comput Biol 2019; 15:e1007431. [PMID: 31652274 PMCID: PMC6834294 DOI: 10.1371/journal.pcbi.1007431] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2018] [Revised: 11/06/2019] [Accepted: 09/24/2019] [Indexed: 01/13/2023] Open
Abstract
Non-muscle myosin II (NMII)-induced multicellular contractility is essential for development, maintenance and remodeling of tissue morphologies. Dysregulation of the cytoskeleton can lead to birth defects or enable cancer progression. We demonstrate that the Matrigel patterning assay, widely used to characterize endothelial cells, is a highly sensitive tool to evaluate cell contractility within a soft extracellular matrix (ECM) environment. We propose a computational model to explore how cell-exerted contractile forces can tear up the cell-Matrigel composite material and gradually remodel it into a network structure. We identify measures that are characteristic for cellular contractility and can be obtained from image analysis of the recorded patterning process. The assay was calibrated by inhibition of NMII activity in A431 epithelial carcinoma cells either directly with blebbistatin or indirectly with Y27632 Rho kinase inhibitor. Using Matrigel patterning as a bioassay, we provide the first functional demonstration that overexpression of S100A4, a calcium-binding protein that is frequently overexpressed in metastatic tumors and inhibits NMIIA activity by inducing filament disassembly, effectively reduces cell contractility. Sensing and exerting forces is a fundamental aspect of tissue organization. We demonstrate that contractile cells form an intricate network structure when placed in a pliable culture environment, a phenomenon often associated with vascular networks and is being actively used to characterize endothelial cells in culture. We propose a computational model that operates with mechanical stresses, plastic deformation and material failure within the cell-extracellular matrix composite to explain the patterning process. In addition to re-interpret a decades-old tool of experimental cell biology, our work suggests a potentially high throughput computational assay to characterize cellular contractility within a soft ECM environment.
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Affiliation(s)
- Előd Méhes
- Department of Biological Physics, Eotvos Lorand University, Budapest, Hungary
| | - Beáta Biri-Kovács
- Department of Biochemistry, Eotvos Lorand University, Budapest, Hungary
| | - Dona G. Isai
- Department of Anatomy & Cell Biology, University of Kansas Medical Center, Kansas City, Kansas, United States of America
| | - Márton Gulyás
- Department of Biological Physics, Eotvos Lorand University, Budapest, Hungary
| | - László Nyitray
- Department of Biochemistry, Eotvos Lorand University, Budapest, Hungary
| | - András Czirók
- Department of Biological Physics, Eotvos Lorand University, Budapest, Hungary
- Department of Anatomy & Cell Biology, University of Kansas Medical Center, Kansas City, Kansas, United States of America
- * E-mail:
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13
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Abstract
For many years, major differences in morphology, motility, and mechanical characteristics have been observed between transformed cancer and normal cells. In this review, we consider these differences as linked to different states of normal and transformed cells that involve distinct mechanosensing and motility pathways. There is a strong correlation between repeated tissue healing and/or inflammation and the probability of cancer, both of which involve growth in adult tissues. Many factors are likely needed to enable growth, including the loss of rigidity sensing, but recent evidence indicates that microRNAs have important roles in causing the depletion of growth-suppressing proteins. One microRNA, miR-21, is overexpressed in many different tissues during both healing and cancer. Normal cells can become transformed by the depletion of cytoskeletal proteins that results in the loss of mechanosensing, particularly rigidity sensing. Conversely, the transformed state can be reversed by the expression of cytoskeletal proteins-without direct alteration of hormone receptor levels. In this review, we consider the different stereotypical forms of motility and mechanosensory systems. A major difference between normal and transformed cells involves a sensitivity of transformed cells to mechanical perturbations. Thus, understanding the different mechanical characteristics of transformed cells may enable new approaches to treating wound healing and cancer.
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Affiliation(s)
- Michael Sheetz
- Mechanobiology Institute and Department of Biological Sciences, National University of Singapore, Singapore 117411
- Molecular MechanoMedicine Program and Department of Biochemistry and Molecular Biology, University of Texas Medical Branch, Galveston, Texas 77555, USA;
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14
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Shah P, Zhao B, Qiang L, He YY. Phosphorylation of xeroderma pigmentosum group C regulates ultraviolet-induced DNA damage repair. Nucleic Acids Res 2019; 46:5050-5060. [PMID: 29660033 PMCID: PMC6007576 DOI: 10.1093/nar/gky239] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2017] [Accepted: 03/21/2018] [Indexed: 12/18/2022] Open
Abstract
Nucleotide excision repair (NER) is the most versatile DNA repair system that removes bulky DNA damage induced by various endogenous and exogenous factors, including UV radiation. Defects in NER can lead to the xeroderma pigmentosum (XP) syndrome, mainly characterized by increased carcinogenesis in the skin. The function of NER factors, including xeroderma pigmentosum group C (XPC), can be regulated by post-translational modifications such as ubiquitination. However, the role of phosphorylation in XPC function remains unknown. Here, we show that phosphorylation of XPC acts as a novel post-translational regulatory mechanism of the NER pathway. We show that XPC is phosphorylated at serine 94. Moreover, after UVB irradiation, XPC phosphorylation regulates recruitment of ubiquitinated XPC and its downstream NER factors to the chromatin. In addition, upon evaluating the predicted kinases for XPC phosphorylation, we found that casein kinase II (CK2) promotes NER. Furthermore, CK2 kinase mediates XPC phosphorylation at serine 94, and also promotes recruitment of ubiquitinated XPC to the chromatin after UVB irradiation. Our findings have identified XPC phosphorylation as a new mechanism for regulating NER following UV-induced DNA damage.
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Affiliation(s)
- Palak Shah
- Department of Medicine, Section of Dermatology, University of Chicago, Chicago, IL 60637, USA.,Committee on Molecular Pathogenesis and Molecular Medicine, University of Chicago, Chicago, IL 60637, USA
| | - Baozhong Zhao
- Department of Medicine, Section of Dermatology, University of Chicago, Chicago, IL 60637, USA
| | - Lei Qiang
- Department of Medicine, Section of Dermatology, University of Chicago, Chicago, IL 60637, USA.,School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, Nanjing 210008, China
| | - Yu-Ying He
- Department of Medicine, Section of Dermatology, University of Chicago, Chicago, IL 60637, USA.,Committee on Molecular Pathogenesis and Molecular Medicine, University of Chicago, Chicago, IL 60637, USA
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15
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Ommer A, Figlia G, Pereira JA, Datwyler AL, Gerber J, DeGeer J, Lalli G, Suter U. Ral GTPases in Schwann cells promote radial axonal sorting in the peripheral nervous system. J Cell Biol 2019; 218:2350-2369. [PMID: 31201267 PMCID: PMC6605813 DOI: 10.1083/jcb.201811150] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Revised: 04/03/2019] [Accepted: 05/15/2019] [Indexed: 12/11/2022] Open
Abstract
Small GTPases of the Rho and Ras families are important regulators of Schwann cell biology. The Ras-like GTPases RalA and RalB act downstream of Ras in malignant peripheral nerve sheath tumors. However, the physiological role of Ral proteins in Schwann cell development is unknown. Using transgenic mice with ablation of one or both Ral genes, we report that Ral GTPases are crucial for axonal radial sorting. While lack of only one Ral GTPase was dispensable for early peripheral nerve development, ablation of both RalA and RalB resulted in persistent radial sorting defects, associated with hallmarks of deficits in Schwann cell process formation and maintenance. In agreement, ex vivo-cultured Ral-deficient Schwann cells were impaired in process extension and the formation of lamellipodia. Our data indicate further that RalA contributes to Schwann cell process extensions through the exocyst complex, a known effector of Ral GTPases, consistent with an exocyst-mediated function of Ral GTPases in Schwann cells.
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Affiliation(s)
- Andrea Ommer
- Institute of Molecular Health Sciences, Department of Biology, ETH Zurich, Zurich, Switzerland
| | - Gianluca Figlia
- Institute of Molecular Health Sciences, Department of Biology, ETH Zurich, Zurich, Switzerland
| | - Jorge A Pereira
- Institute of Molecular Health Sciences, Department of Biology, ETH Zurich, Zurich, Switzerland
| | - Anna Lena Datwyler
- Institute of Molecular Health Sciences, Department of Biology, ETH Zurich, Zurich, Switzerland
| | - Joanne Gerber
- Institute of Molecular Health Sciences, Department of Biology, ETH Zurich, Zurich, Switzerland
| | - Jonathan DeGeer
- Institute of Molecular Health Sciences, Department of Biology, ETH Zurich, Zurich, Switzerland
| | - Giovanna Lalli
- Wolfson Centre for Age-Related Diseases, King's College London, London, UK
| | - Ueli Suter
- Institute of Molecular Health Sciences, Department of Biology, ETH Zurich, Zurich, Switzerland
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16
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Singh MK, Martin APJ, Joffre C, Zago G, Camonis J, Coppey M, Parrini MC. Localization of RalB signaling at endomembrane compartments and its modulation by autophagy. Sci Rep 2019; 9:8910. [PMID: 31222145 PMCID: PMC6586930 DOI: 10.1038/s41598-019-45443-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Accepted: 05/30/2019] [Indexed: 02/02/2023] Open
Abstract
The monomeric GTPase RalB controls crucial physiological processes, including autophagy and invasion, but it still remains unclear how this multi-functionality is achieved. Previously, we reported that the RalGEF (Guanine nucleotide Exchange Factor) RGL2 binds and activates RalB to promote invasion. Here we show that RGL2, a major activator of RalB, is also required for autophagy. Using a novel automated image analysis method, Endomapper, we quantified the endogenous localization of the RGL2 activator and its substrate RalB at different endomembrane compartments, in an isogenic normal and Ras-transformed cell model. In both normal and Ras-transformed cells, we observed that RGL2 and RalB substantially localize at early and recycling endosomes, and to lesser extent at autophagosomes, but not at trans-Golgi. Interestingly the use of a FRET-based RalB biosensor indicated that RalB signaling is active at these endomembrane compartments at basal level in rich medium. Furthermore, induction of autophagy by nutrient starvation led to a considerable reduction of early and recycling endosomes, in contrast to the expected increase of autophagosomes, in both normal and Ras-transformed cells. However, autophagy mildly affected relative abundances of both RGL2 and RalB at early and recycling endosomes, and at autophagosomes. Interestingly, RalB activity increased at autophagosomes upon starvation in normal cells. These results suggest that the contribution of endosome membranes (carrying RGL2 and RalB molecules) increases total pool of RGL2-RalB at autophagosome forming compartments and might contribute to amplify RalB signaling to support autophagy.
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Affiliation(s)
- Manish Kumar Singh
- Institut Curie, Centre de Recherche, Paris Sciences et Lettres Research University, 75005, Paris, France
- ART group, Inserm U830, 75005, Paris, France
| | - Alexandre P J Martin
- Institut Curie, Centre de Recherche, Paris Sciences et Lettres Research University, 75005, Paris, France
- ART group, Inserm U830, 75005, Paris, France
| | - Carine Joffre
- Centre de Recherches en Cancérologie de Toulouse (CRCT), Inserm UMR1037, Toulouse, France
| | - Giulia Zago
- Institut Curie, Centre de Recherche, Paris Sciences et Lettres Research University, 75005, Paris, France
- ART group, Inserm U830, 75005, Paris, France
| | - Jacques Camonis
- Institut Curie, Centre de Recherche, Paris Sciences et Lettres Research University, 75005, Paris, France
- ART group, Inserm U830, 75005, Paris, France
| | - Mathieu Coppey
- Institut Curie, Centre de Recherche, Paris Sciences et Lettres Research University, 75005, Paris, France
- LOCCO group, UMR168, 75005, Paris, France
| | - Maria Carla Parrini
- Institut Curie, Centre de Recherche, Paris Sciences et Lettres Research University, 75005, Paris, France.
- ART group, Inserm U830, 75005, Paris, France.
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17
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Zago G, Veith I, Singh MK, Fuhrmann L, De Beco S, Remorino A, Takaoka S, Palmeri M, Berger F, Brandon N, El Marjou A, Vincent-Salomon A, Camonis J, Coppey M, Parrini MC. RalB directly triggers invasion downstream Ras by mobilizing the Wave complex. eLife 2018; 7:40474. [PMID: 30320548 PMCID: PMC6226288 DOI: 10.7554/elife.40474] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Accepted: 10/14/2018] [Indexed: 12/27/2022] Open
Abstract
The two Ral GTPases, RalA and RalB, have crucial roles downstream Ras oncoproteins in human cancers; in particular, RalB is involved in invasion and metastasis. However, therapies targeting Ral signalling are not available yet. By a novel optogenetic approach, we found that light-controlled activation of Ral at plasma-membrane promotes the recruitment of the Wave Regulatory Complex (WRC) via its effector exocyst, with consequent induction of protrusions and invasion. We show that active Ras signals to RalB via two RalGEFs (Guanine nucleotide Exchange Factors), RGL1 and RGL2, to foster invasiveness; RalB contribution appears to be more important than that of MAPK and PI3K pathways. Moreover, on the clinical side, we uncovered a potential role of RalB in human breast cancers by determining that RalB expression at protein level increases in a manner consistent with progression toward metastasis. This work highlights the Ras-RGL1/2-RalB-exocyst-WRC axis as appealing target for novel anticancer strategies. Cancers develop when cells in the body divide rapidly in an uncontroled manner. It is generally possible to cure cancers that remain contained within a small area. However, if the tumor cells start to move, the cancer may spread in the body and become life threatening. Currently, most of the anti-cancer treatments act to reduce the multiplication of these cells, but not their ability to migrate. A signal protein called Ras stimulates human cells to grow and move around. In healthy cells, the activity of Ras is tightly controled to ensure cells only divide and migrate at particular times, but in roughly 30% of all human cancers, Ras is abnormally active. Ras switches on another protein, named RalB, which is also involved in inappropriate cell migration. Yet, it is not clear how RalB is capable to help Ras trigger the migration of cells. Zago et al. used an approach called optogenetics to specifically activate the RalB protein in human cells using a laser that produces blue light. When activated, the light-controlled RalB started abnormal cell migration; this was used to dissect which molecules and mechanisms were involved in the process. Taken together, the experiments showed that, first, Ras ‘turns on’ RalB by changing the location of two proteins that control RalB. Then, the activated RalB regulates the exocyst, a group of proteins that travel within the cell. In turn, the exocyst recruits another group of proteins, named the Wave complex, which is part of the molecular motor required for cells to migrate. Zago et al. also found that, in patients, the RalB protein was present at abnormally high levels in samples of breast cancer cells that had migrated to another part of the body. Overall, these findings indicate that the role of RalB protein in human cancers is larger than previously thought, and they highlight a new pathway that could be a target for new anti-cancer drugs.
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Affiliation(s)
- Giulia Zago
- Institut Curie, Centre de Recherche, Paris Sciences et Lettres Research University, Paris, France.,ART Group, Inserm U830, Paris, France
| | - Irina Veith
- Institut Curie, Centre de Recherche, Paris Sciences et Lettres Research University, Paris, France.,ART Group, Inserm U830, Paris, France
| | - Manish Kumar Singh
- Institut Curie, Centre de Recherche, Paris Sciences et Lettres Research University, Paris, France.,ART Group, Inserm U830, Paris, France
| | - Laetitia Fuhrmann
- Institut Curie, Centre de Recherche, Paris Sciences et Lettres Research University, Paris, France.,Department of Pathology, Institut Curie, Paris, France
| | - Simon De Beco
- Institut Curie, Centre de Recherche, Paris Sciences et Lettres Research University, Paris, France.,LOCCO Group, UMR168, Paris, France
| | - Amanda Remorino
- Institut Curie, Centre de Recherche, Paris Sciences et Lettres Research University, Paris, France.,LOCCO Group, UMR168, Paris, France
| | - Saori Takaoka
- Institut Curie, Centre de Recherche, Paris Sciences et Lettres Research University, Paris, France.,ART Group, Inserm U830, Paris, France
| | - Marjorie Palmeri
- Institut Curie, Centre de Recherche, Paris Sciences et Lettres Research University, Paris, France.,ART Group, Inserm U830, Paris, France
| | - Frédérique Berger
- Institut Curie, Centre de Recherche, Paris Sciences et Lettres Research University, Paris, France.,Department of Biostatistics, Institut Curie, Paris, France
| | - Nathalie Brandon
- Institut Curie, Centre de Recherche, Paris Sciences et Lettres Research University, Paris, France.,ART Group, Inserm U830, Paris, France
| | - Ahmed El Marjou
- Institut Curie, Centre de Recherche, Paris Sciences et Lettres Research University, Paris, France.,Protein Expression and Purification Core Facility, Paris, France
| | - Anne Vincent-Salomon
- Institut Curie, Centre de Recherche, Paris Sciences et Lettres Research University, Paris, France.,Department of Pathology, Institut Curie, Paris, France
| | - Jacques Camonis
- Institut Curie, Centre de Recherche, Paris Sciences et Lettres Research University, Paris, France.,ART Group, Inserm U830, Paris, France
| | - Mathieu Coppey
- Institut Curie, Centre de Recherche, Paris Sciences et Lettres Research University, Paris, France.,LOCCO Group, UMR168, Paris, France
| | - Maria Carla Parrini
- Institut Curie, Centre de Recherche, Paris Sciences et Lettres Research University, Paris, France.,ART Group, Inserm U830, Paris, France
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18
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Kent OA, Sandí MJ, Burston HE, Brown KR, Rottapel R. An oncogenic KRAS transcription program activates the RHOGEF ARHGEF2 to mediate transformed phenotypes in pancreatic cancer. Oncotarget 2018; 8:4484-4500. [PMID: 27835861 PMCID: PMC5354848 DOI: 10.18632/oncotarget.13152] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2016] [Accepted: 10/13/2016] [Indexed: 12/29/2022] Open
Abstract
Activating mutations of KRAS are nearly ubiquitous in pancreatic adenocarcinomas occurring in greater than 90% of cases. Cellular transformation by oncogenic RAS requires the RHO guanine exchange factor ARHGEF2 (also known as GEF-H1) for tumor growth and survival. Here, we find oncogenic KRAS activates ARHGEF2 through a minimal RAS responsive promoter. We have determined the endogenous ARHGEF2 promoter is positively regulated by the transcription factors ELK1, ETS1, SP1 and SP3 and negatively regulated by the RAS responsive element binding protein (RREB1). We find that the panel of ARHGEF2-regulating transcription factors modulates RAS transformed phenotypes including cellular viability, anchorage-independent growth and invasion-migration of pancreatic cancer cells. RREB1 knockdown activates the amplitude and duration of RHOA via increased ARHGEF2 expression. By relieving the negative regulation of RREB1 on the ARHGEF2 promoter, we determined that ETS1 and SP3 are essential for the normal expression of ARHGEF2 and contribute to the migratory behavior of pancreatic cancer cells. Furthermore, enforced expression of ARHGEF2 rescues loss of SP3 driven invasion-migration and anchorage-independent growth defective phenotypes through restored activation of RHOA. Collectively, our results identify a transcription factor program required for RAS transformation and provide mechanistic insight into the highly metastatic behavior of pancreatic cancer.
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Affiliation(s)
- Oliver A Kent
- Princess Margaret Cancer Centre, University Health Network, Toronto Medical Discovery Tower, University of Toronto, Toronto, Canada
| | - María-José Sandí
- Princess Margaret Cancer Centre, University Health Network, Toronto Medical Discovery Tower, University of Toronto, Toronto, Canada
| | - Helen E Burston
- Princess Margaret Cancer Centre, University Health Network, Toronto Medical Discovery Tower, University of Toronto, Toronto, Canada
| | - Kevin R Brown
- Donnelly Centre and Banting and Best Department of Medical Research, University of Toronto, Toronto, Canada
| | - Robert Rottapel
- Princess Margaret Cancer Centre, University Health Network, Toronto Medical Discovery Tower, University of Toronto, Toronto, Canada.,Department of Medicine, St. Michael's Hospital, Toronto, Canada.,Department of Medical Biophysics, St. Michael's Hospital, Toronto, Canada.,Department of Immunology, St. Michael's Hospital, Toronto, Canada.,Division of Rheumatology, St. Michael's Hospital, Toronto, Canada
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19
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D’Aloia A, Berruti G, Costa B, Schiller C, Ambrosini R, Pastori V, Martegani E, Ceriani M. RalGPS2 is involved in tunneling nanotubes formation in 5637 bladder cancer cells. Exp Cell Res 2018; 362:349-361. [DOI: 10.1016/j.yexcr.2017.11.036] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Revised: 11/27/2017] [Accepted: 11/29/2017] [Indexed: 11/25/2022]
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20
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Cooper JM, Ou YH, McMillan EA, Vaden RM, Zaman A, Bodemann BO, Makkar G, Posner BA, White MA. TBK1 Provides Context-Selective Support of the Activated AKT/mTOR Pathway in Lung Cancer. Cancer Res 2017; 77:5077-5094. [PMID: 28716898 PMCID: PMC5833933 DOI: 10.1158/0008-5472.can-17-0829] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2017] [Revised: 05/19/2017] [Accepted: 07/05/2017] [Indexed: 12/27/2022]
Abstract
Emerging observations link dysregulation of TANK-binding kinase 1 (TBK1) to developmental disorders, inflammatory disease, and cancer. Biochemical mechanisms accounting for direct participation of TBK1 in host defense signaling have been well described. However, the molecular underpinnings of the selective participation of TBK1 in a myriad of additional cell biological systems in normal and pathophysiologic contexts remain poorly understood. To elucidate the context-selective role of TBK1 in cancer cell survival, we employed a combination of broad-scale chemogenomic and interactome discovery strategies to generate data-driven mechanism-of-action hypotheses. This approach uncovered evidence that TBK1 supports AKT/mTORC1 pathway activation and function through direct modulation of multiple pathway components acting both upstream and downstream of the mTOR kinase itself. Furthermore, we identified distinct molecular features in which mesenchymal, Ras-mutant lung cancer is acutely dependent on TBK1-mediated support of AKT/mTORC1 pathway activation for survival. Cancer Res; 77(18); 5077-94. ©2017 AACR.
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MESH Headings
- Apoptosis/drug effects
- Apoptosis/genetics
- Carcinoma, Non-Small-Cell Lung/drug therapy
- Carcinoma, Non-Small-Cell Lung/genetics
- Carcinoma, Non-Small-Cell Lung/metabolism
- Carcinoma, Non-Small-Cell Lung/pathology
- Cell Proliferation/drug effects
- Cell Proliferation/genetics
- Cell Transformation, Neoplastic/drug effects
- Cell Transformation, Neoplastic/genetics
- Cell Transformation, Neoplastic/metabolism
- Cell Transformation, Neoplastic/pathology
- Humans
- Lung Neoplasms/drug therapy
- Lung Neoplasms/genetics
- Lung Neoplasms/metabolism
- Lung Neoplasms/pathology
- Mesoderm/drug effects
- Mesoderm/metabolism
- Mesoderm/pathology
- Phosphorylation/drug effects
- Protein Serine-Threonine Kinases/genetics
- Protein Serine-Threonine Kinases/metabolism
- Proto-Oncogene Proteins c-akt/genetics
- Proto-Oncogene Proteins c-akt/metabolism
- Regulatory Elements, Transcriptional/drug effects
- Signal Transduction/drug effects
- Small Molecule Libraries/pharmacology
- TOR Serine-Threonine Kinases/genetics
- TOR Serine-Threonine Kinases/metabolism
- Tumor Cells, Cultured
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Affiliation(s)
- Jonathan M Cooper
- Department of Cell Biology, UT Southwestern Medical Center, Dallas, Texas
| | - Yi-Hung Ou
- Department of Cell Biology, UT Southwestern Medical Center, Dallas, Texas
| | | | - Rachel M Vaden
- Department of Cell Biology, UT Southwestern Medical Center, Dallas, Texas
| | - Aubhishek Zaman
- Department of Cell Biology, UT Southwestern Medical Center, Dallas, Texas
| | - Brian O Bodemann
- Department of Cell Biology, UT Southwestern Medical Center, Dallas, Texas
| | - Gurbani Makkar
- Department of Cell Biology, UT Southwestern Medical Center, Dallas, Texas
| | - Bruce A Posner
- Department of Biochemistry, UT Southwestern Medical Center, Dallas, Texas
| | - Michael A White
- Department of Cell Biology, UT Southwestern Medical Center, Dallas, Texas.
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21
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Piotrowski-Daspit AS, Nerger BA, Wolf AE, Sundaresan S, Nelson CM. Dynamics of Tissue-Induced Alignment of Fibrous Extracellular Matrix. Biophys J 2017; 113:702-713. [PMID: 28793224 DOI: 10.1016/j.bpj.2017.06.046] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2016] [Revised: 06/14/2017] [Accepted: 06/23/2017] [Indexed: 12/21/2022] Open
Abstract
Aligned fibers of extracellular matrix (ECM) affect the direction, efficiency, and persistence of migrating cells. To uncover the mechanisms by which multicellular tissues align their surrounding ECM before migration, we used an engineered three-dimensional culture model to investigate the dynamics of ECM alignment around tissues of defined geometry. Analysis of ECM alignment over time revealed that tissues rapidly reorganize their surrounding matrix, with a characteristic time that depends on the type of cell and the initial tissue geometry. We found that matrix metalloproteinase activity is not required for matrix alignment before cell migration. Instead, alignment is driven by Rho-mediated cytoskeletal contractility and accelerated by propagation of tension through intercellular adhesions. Our data suggest that multicellular tissues align their surrounding matrix by pulling collectively to exert strain, which is primarily a physical process. Consistently, the pattern of matrix alignment depends on tissue geometry and the resulting distribution of mechanical strain, with asymmetric tissues generating a higher degree of matrix alignment along their longest axes. The rapid ability of multicellular tissues to physically remodel their matrix enables their constituent cells to migrate efficiently along aligned fibers and to quickly change their direction according to other microenvironmental cues, which is important for both normal and disease processes.
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Affiliation(s)
| | - Bryan A Nerger
- Department of Chemical and Biological Engineering, Princeton University, Princeton, New Jersey
| | - Abraham E Wolf
- Department of Chemical and Biological Engineering, Princeton University, Princeton, New Jersey
| | - Sankaran Sundaresan
- Department of Chemical and Biological Engineering, Princeton University, Princeton, New Jersey
| | - Celeste M Nelson
- Department of Chemical and Biological Engineering, Princeton University, Princeton, New Jersey; Department of Molecular Biology, Princeton University, Princeton, New Jersey.
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22
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Zago G, Biondini M, Camonis J, Parrini MC. A family affair: A Ral-exocyst-centered network links Ras, Rac, Rho signaling to control cell migration. Small GTPases 2017; 10:323-330. [PMID: 28498728 DOI: 10.1080/21541248.2017.1310649] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
Cell migration is central to many developmental, physiologic and pathological processes, including cancer progression. The Ral GTPases (RalA and RalB) which act down-stream the Ras oncogenes, are key players in the coordination between membrane trafficking and actin polymerization. A major direct effector of Ral, the exocyst complex, works in polarized exocytosis and is at the center of multiple protein-protein interactions that support cell migration by promoting protrusion formation, front-rear polarization, and extra-cellular matrix degradation. In this review we describe the recent advancements in deciphering the molecular mechanisms underlying this role of Ral via exocyst on cell migration. Among others, we will discuss the recently identified cross-talk between Ral and Rac1 pathways: exocyst binds to a negative regulator (the RacGAP SH3BP1) and to the major effector (the Wave Regulatory Complex, WRC) of Rac1, the master regulator of protrusions. Next challenge will be to better characterize the dynamics in space and in time of these molecular interplays, to better understand the pleiotropic functions of Ral in both normal and cancer cells.
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Affiliation(s)
- Giulia Zago
- a Institut Curie, Centre de Recherche, Paris Sciences et Lettres Research University , Paris , France.,b ART group, Inserm U830 , Paris , France
| | - Marco Biondini
- a Institut Curie, Centre de Recherche, Paris Sciences et Lettres Research University , Paris , France.,b ART group, Inserm U830 , Paris , France
| | - Jacques Camonis
- a Institut Curie, Centre de Recherche, Paris Sciences et Lettres Research University , Paris , France.,b ART group, Inserm U830 , Paris , France
| | - Maria Carla Parrini
- a Institut Curie, Centre de Recherche, Paris Sciences et Lettres Research University , Paris , France.,b ART group, Inserm U830 , Paris , France
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23
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Integrin-Dependent Regulation of Small GTPases: Role in Cell Migration. J Indian Inst Sci 2017. [DOI: 10.1007/s41745-016-0010-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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24
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Jiu Y, Peränen J, Schaible N, Cheng F, Eriksson JE, Krishnan R, Lappalainen P. Vimentin intermediate filaments control actin stress fiber assembly through GEF-H1 and RhoA. J Cell Sci 2017; 130:892-902. [PMID: 28096473 PMCID: PMC5358333 DOI: 10.1242/jcs.196881] [Citation(s) in RCA: 109] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2016] [Accepted: 01/04/2017] [Indexed: 12/17/2022] Open
Abstract
The actin and intermediate filament cytoskeletons contribute to numerous cellular processes, including morphogenesis, cytokinesis and migration. These two cytoskeletal systems associate with each other, but the underlying mechanisms of this interaction are incompletely understood. Here, we show that inactivation of vimentin leads to increased actin stress fiber assembly and contractility, and consequent elevation of myosin light chain phosphorylation and stabilization of tropomyosin-4.2 (see Geeves et al., 2015). The vimentin-knockout phenotypes can be rescued by re-expression of wild-type vimentin, but not by the non-filamentous ‘unit length form’ vimentin, demonstrating that intact vimentin intermediate filaments are required to facilitate the effects on the actin cytoskeleton. Finally, we provide evidence that the effects of vimentin on stress fibers are mediated by activation of RhoA through its guanine nucleotide exchange factor GEF-H1 (also known as ARHGEF2). Vimentin depletion induces phosphorylation of the microtubule-associated GEF-H1 on Ser886, and thereby promotes RhoA activity and actin stress fiber assembly. Taken together, these data reveal a new mechanism by which intermediate filaments regulate contractile actomyosin bundles, and may explain why elevated vimentin expression levels correlate with increased migration and invasion of cancer cells. Summary: Vimentin intermediate filaments control the activity of RhoA, and consequent stress fiber assembly and contractility by downregulating its guanine nucleotide exchange factor GEF-H1.
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Affiliation(s)
- Yaming Jiu
- Institute of Biotechnology, P.O. Box 56, University of Helsinki, Helsinki 00014, Finland
| | - Johan Peränen
- Faculty of Medicine, P.O. Box 63, University of Helsinki, Helsinki 00014, Finland
| | - Niccole Schaible
- Department of Emergency Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA
| | - Fang Cheng
- Cell Biology, Biosciences, Faculty of Science and Engineering, Åbo Akademi University, FI-20520 Turku, Finland.,Turku Centre for Biotechnology, University of Turku and Åbo Akademi University, POB 123, FI-20521 Turku, Finland
| | - John E Eriksson
- Cell Biology, Biosciences, Faculty of Science and Engineering, Åbo Akademi University, FI-20520 Turku, Finland.,Turku Centre for Biotechnology, University of Turku and Åbo Akademi University, POB 123, FI-20521 Turku, Finland
| | - Ramaswamy Krishnan
- Department of Emergency Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA
| | - Pekka Lappalainen
- Institute of Biotechnology, P.O. Box 56, University of Helsinki, Helsinki 00014, Finland
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25
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Lu X, Guo H, Chen X, Xiao J, Zou Y, Wang W, Chen Q. Effect of RhoC on the epithelial-mesenchymal transition process induced by TGF-β1 in lung adenocarcinoma cells. Oncol Rep 2016; 36:3105-3112. [PMID: 27748883 PMCID: PMC5112615 DOI: 10.3892/or.2016.5146] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2016] [Accepted: 05/31/2016] [Indexed: 12/30/2022] Open
Abstract
According to recent research, Ras homolog gene family member C (RhoC) is confirmed to have a powerful regulatory effect on cell motility mediated by the cytoskeleton, and this process is closely associated with tumor invasion and metastasis. In addition, the epithelial-mesenchymal transition (EMT) process which causes cytoskeleton rearrangement, also plays a pivotal role in tumor invasion and metastasis.Consequently, in the present study, we aimed to ascertain whether RhoC has an effect on the EMT process induced by TGF-β1 in lung adenocarcinoma cells and whether RhoC promotes tumor invasion by mediating the occurrence of EMT. Based on the findings, we demonstrated that RhoC was an essential mediator of the EMT process in lung adenocarcinoma cell line A549 which was evaluated by observing the morphological characteristics of the cells and by assessing the expression levels of two EMT marker proteins: E-cadherin and vimentin. During the process of EMT in the A549 cells induced by TGF-β1 (5 ng/ml), upregulated RhoC protein and RhoC activity were detected, which was associated with the enhanced invasive capability of the cells in vitro. Conversely, downregulation of the expression of RhoC by shRNA markedly impeded EMT progression as well as the invasion of A549 cells. Our results may provide a novel target towards the prevention of metastasis in advanced lung adenocarcinoma.
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Affiliation(s)
- Xiaoxiao Lu
- Department of Geriatrics, Xiangya Hospital of Central South University, Changsha, Hunan 410008, P.R. China
| | - Honglan Guo
- Department of Geriatrics, Xiangya Hospital of Central South University, Changsha, Hunan 410008, P.R. China
| | - Xi Chen
- Department of Respiratory Medicine, Xiangya Hospital of Central South University, Changsha, Hunan 410008, P.R. China
| | - Jian Xiao
- Department of Geriatrics, Xiangya Hospital of Central South University, Changsha, Hunan 410008, P.R. China
| | - Yong Zou
- Department of Geriatrics, Xiangya Hospital of Central South University, Changsha, Hunan 410008, P.R. China
| | - Wei Wang
- Department of Nephrology Medicine, Huaihe Hospital of Henan University, Kaifeng, Henan 475000, P.R. China
| | - Qiong Chen
- Department of Geriatrics, Xiangya Hospital of Central South University, Changsha, Hunan 410008, P.R. China
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26
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Biondini M, Sadou-Dubourgnoux A, Paul-Gilloteaux P, Zago G, Arslanhan MD, Waharte F, Formstecher E, Hertzog M, Yu J, Guerois R, Gautreau A, Scita G, Camonis J, Parrini MC. Direct interaction between exocyst and Wave complexes promotes cell protrusions and motility. J Cell Sci 2016; 129:3756-3769. [PMID: 27591259 DOI: 10.1242/jcs.187336] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2016] [Accepted: 08/16/2016] [Indexed: 12/25/2022] Open
Abstract
Coordination between membrane trafficking and actin polymerization is fundamental in cell migration, but a dynamic view of the underlying molecular mechanisms is still missing. The Rac1 GTPase controls actin polymerization at protrusions by interacting with its effector, the Wave regulatory complex (WRC). The exocyst complex, which functions in polarized exocytosis, has been involved in the regulation of cell motility. Here, we show a physical and functional connection between exocyst and WRC. Purified components of exocyst and WRC directly associate in vitro, and interactions interfaces are identified. The exocyst-WRC interaction is confirmed in cells by co-immunoprecipitation and is shown to occur independently of the Arp2/3 complex. Disruption of the exocyst-WRC interaction leads to impaired migration. By using time-lapse microscopy coupled to image correlation analysis, we visualized the trafficking of the WRC towards the front of the cell in nascent protrusions. The exocyst is necessary for WRC recruitment at the leading edge and for resulting cell edge movements. This direct link between the exocyst and WRC provides a new mechanistic insight into the spatio-temporal regulation of cell migration.
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Affiliation(s)
- Marco Biondini
- Institut Curie, Centre de Recherche, Paris Sciences et Lettres Research University, Paris 75005, France ART group, Inserm U830, Paris 75005, France
| | - Amel Sadou-Dubourgnoux
- Institut Curie, Centre de Recherche, Paris Sciences et Lettres Research University, Paris 75005, France ART group, Inserm U830, Paris 75005, France
| | - Perrine Paul-Gilloteaux
- Institut Curie, Centre de Recherche, Paris Sciences et Lettres Research University, Paris 75005, France Cell and Tissue Imaging Facility (PICT-IBiSA), CNRS UMR 144, Paris 75005, France
| | - Giulia Zago
- Institut Curie, Centre de Recherche, Paris Sciences et Lettres Research University, Paris 75005, France ART group, Inserm U830, Paris 75005, France
| | - Melis D Arslanhan
- Institut Curie, Centre de Recherche, Paris Sciences et Lettres Research University, Paris 75005, France ART group, Inserm U830, Paris 75005, France
| | - François Waharte
- Institut Curie, Centre de Recherche, Paris Sciences et Lettres Research University, Paris 75005, France Cell and Tissue Imaging Facility (PICT-IBiSA), CNRS UMR 144, Paris 75005, France
| | | | - Maud Hertzog
- Laboratoire de Microbiologie et Génétique Moléculaire, CNRS UMR 5100, Université Paul Sabatier, Toulouse 31062, France
| | - Jinchao Yu
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, University Paris-Saclay, CEA-Saclay, Gif-sur-Yvette 91191
| | - Raphael Guerois
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, University Paris-Saclay, CEA-Saclay, Gif-sur-Yvette 91191
| | - Alexis Gautreau
- Laboratoire de Biochimie Ecole Polytechnique, CNRS UMR7654, Palaiseau Cedex 91128, France
| | - Giorgio Scita
- IFOM, Fondazione Istituto FIRC di Oncologia Molecolare and Dipartimento di Scienze della Salute, Università degli Studi di Milano, Milan 20139, Italy
| | - Jacques Camonis
- Institut Curie, Centre de Recherche, Paris Sciences et Lettres Research University, Paris 75005, France ART group, Inserm U830, Paris 75005, France
| | - Maria Carla Parrini
- Institut Curie, Centre de Recherche, Paris Sciences et Lettres Research University, Paris 75005, France ART group, Inserm U830, Paris 75005, France
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27
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Guo B, Hui Q, Zhang Y, Chang P, Tao K. miR-194 is a negative regulator of GEF-H1 pathway in melanoma. Oncol Rep 2016; 36:2412-20. [PMID: 27573550 DOI: 10.3892/or.2016.5020] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2016] [Accepted: 08/01/2016] [Indexed: 11/05/2022] Open
Abstract
The incidence and associated mortality of melanoma continues to increase worldwide. At present, there is no curative therapy for advanced stage of melanoma. It is necessary to find new indicators of prognosis and therapeutic targets. Increasing evidence shows that miRNA can provide potential candidate biomarkers for melanoma and therapeutic targets. GEF-H1, a regulator of RhoA, as oncogenic driver in melanoma, promotes the growth and invasion of melanoma. miR-194 is a tumor-suppressor gene in multiple tumors, such as bladder and non-small cell lung cancer, and clear cell renal cell carcinoma. In the present study, we demonstrated that GEF-H1 serves as target of miR-194. Overexpression of miR-194 downregulates the GEF-H1/RhoA pathway, inhibits melanoma cancer cell proliferation and metastasis. Furthermore, miR-194 expression is negatively associated with tumor-node-metastasis (TNM) stages. Briefly, our findings provided new theoretical basis for melanoma treatment.
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Affiliation(s)
- Bingyu Guo
- Reconstructive and Plastic Surgery, The General Hospital of Shenyang Military Region, Shenhe, Shenyang, Liaoning 110016, P.R. China
| | - Qiang Hui
- Reconstructive and Plastic Surgery, The General Hospital of Shenyang Military Region, Shenhe, Shenyang, Liaoning 110016, P.R. China
| | - Yu Zhang
- Reconstructive and Plastic Surgery, The General Hospital of Shenyang Military Region, Shenhe, Shenyang, Liaoning 110016, P.R. China
| | - Peng Chang
- Reconstructive and Plastic Surgery, The General Hospital of Shenyang Military Region, Shenhe, Shenyang, Liaoning 110016, P.R. China
| | - Kai Tao
- Reconstructive and Plastic Surgery, The General Hospital of Shenyang Military Region, Shenhe, Shenyang, Liaoning 110016, P.R. China
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28
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Shi J, Guo B, Zhang Y, Hui Q, Chang P, Tao K. Guanine nucleotide exchange factor H1 can be a new biomarker of melanoma. Biologics 2016; 10:89-98. [PMID: 27462139 PMCID: PMC4939981 DOI: 10.2147/btt.s109643] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Guanine nucleotide exchange factor H1 (GEF-H1), which couples microtubule dynamics to RhoA activation, is a microtubule-regulated exchange factor. Studies have shown that GEF-H1 can be involved in various cancer pathways; however, the clinical significance of GEF-H1 expression and functions in melanoma has not been established. In this study, we investigated the relationship between clinical outcomes and GEF-H1 functions in melanoma. A total of 60 cases of different grades of melanoma samples were used to detect the expression of GEF-H1. Results showed that both messenger RNA and protein levels of GEF-H1 were significantly higher in high-grade melanomas. Furthermore, patients with high GEF-H1 expression had a shorter overall survival (22 months) than patients with low level of GEF-H1 expression (33.38 months). We also found that GEF-H1 can promote the proliferation and metastasis of melanoma cells. In summary, these results suggested that GEF-H1 may be a valuable biomarker for assessing the degree and prognosis of melanoma following surgery.
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Affiliation(s)
- Jie Shi
- Reconstructive and Plastic Surgery, The General Hospital of Shenyang Military Region, Shenyang, People’s Republic of China
| | - Bingyu Guo
- Reconstructive and Plastic Surgery, The General Hospital of Shenyang Military Region, Shenyang, People’s Republic of China
| | - Yu Zhang
- Reconstructive and Plastic Surgery, The General Hospital of Shenyang Military Region, Shenyang, People’s Republic of China
| | - Qiang Hui
- Reconstructive and Plastic Surgery, The General Hospital of Shenyang Military Region, Shenyang, People’s Republic of China
| | - Peng Chang
- Reconstructive and Plastic Surgery, The General Hospital of Shenyang Military Region, Shenyang, People’s Republic of China
| | - Kai Tao
- Reconstructive and Plastic Surgery, The General Hospital of Shenyang Military Region, Shenyang, People’s Republic of China
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