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Arriagada C, Silva P, Millet M, Solano L, Moraga C, Torres VA. Focal adhesion kinase-dependent activation of the early endocytic protein Rab5 is associated with cell migration. J Biol Chem 2019; 294:12836-12845. [PMID: 31292193 DOI: 10.1074/jbc.ra119.008667] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Revised: 06/17/2019] [Indexed: 12/12/2022] Open
Abstract
Focal adhesion kinase (FAK) is a central regulator of integrin-dependent cell adhesion and migration and has recently been shown to co-localize with endosomal proteins. The early endocytic protein Rab5 controls integrin trafficking, focal adhesion disassembly, and cell migration and has been shown to be activated upon integrin engagement by mechanisms that remain unclear. Because FAK is a critical regulator of integrin-dependent signaling and Rab5 recapitulates FAK-mediated effects, we evaluated the possibility that FAK activates Rab5 and contributes to cell migration. Pulldown assays revealed that Rab5-GTP levels are decreased upon treatment with a pharmacological inhibitor of FAK, PF562,271, in resting A549 cells. These events were associated with decreased peripheral Rab5 puncta and a reduced number of early endosome antigen 1 (EEA1)-positive early endosomes. Accordingly, as indicated by FAK inhibition experiments and in FAK-null fibroblasts, adhesion-induced FAK activity increased Rab5-GTP levels. In fact, expression of WT FAK and FAK/Y180A/M183A (open conformation), but not FAK/Arg454 (kinase-dead), augmented Rab5-GTP levels in FAK-null fibroblasts and A549 cells. Moreover, expression of a GDP-bound Rab5 mutant (Rab5/S34N) or shRNA-mediated knockdown of endogenous Rab5 prevented FAK-induced A549 cell migration, whereas expression of WT or GTP-bound Rab5 (Rab5/Q79L), but not Rab5/S34N, promoted cell migration in FAK-null fibroblasts. Mechanistically, FAK co-immunoprecipitated with the GTPase-activating protein p85α in a phosphorylation (Tyr397)-dependent manner, preventing Rab5-GTP loading, as shown by knockdown and transfection recovery experiments. Taken together, these results reveal that FAK activates Rab5, leading to cell migration.
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Affiliation(s)
- Cecilia Arriagada
- Institute for Research in Dental Sciences, Faculty of Dentistry, Universidad de Chile, Santiago 8380000, Chile
| | - Patricio Silva
- Institute for Research in Dental Sciences, Faculty of Dentistry, Universidad de Chile, Santiago 8380000, Chile.,Faculty of Health Sciences, Universidad Central de Chile, Santiago 8380000, Chile
| | - Martial Millet
- Institute for Research in Dental Sciences, Faculty of Dentistry, Universidad de Chile, Santiago 8380000, Chile
| | - Luis Solano
- Institute for Research in Dental Sciences, Faculty of Dentistry, Universidad de Chile, Santiago 8380000, Chile
| | - Carolina Moraga
- Institute for Research in Dental Sciences, Faculty of Dentistry, Universidad de Chile, Santiago 8380000, Chile
| | - Vicente A Torres
- Institute for Research in Dental Sciences, Faculty of Dentistry, Universidad de Chile, Santiago 8380000, Chile .,Advanced Center for Chronic Diseases, Universidad de Chile, Santiago 8380000, Chile
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Oliveira-Nunes MC, Assad Kahn S, de Oliveira Barbeitas AL, E Spohr TCLDS, Dubois LGF, Ventura Matioszek GM, Querido W, Campanati L, de Brito Neto JM, Lima FRS, Moura-Neto V, Carneiro K. The availability of the embryonic TGF-β protein Nodal is dynamically regulated during glioblastoma multiforme tumorigenesis. Cancer Cell Int 2016; 16:46. [PMID: 27330409 PMCID: PMC4912793 DOI: 10.1186/s12935-016-0324-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Accepted: 06/07/2016] [Indexed: 12/19/2022] Open
Abstract
Background Glioblastoma (GBM) is the most common primary brain tumor presenting self-renewing cancer stem cells. The role of these cells on the development of the tumors has been proposed to recapitulate programs from embryogenesis. Recently, the embryonic transforming growth factor-β (TGF-β) protein Nodal has been shown to be reactivated upon tumor development; however, its availability in GBM cells has not been addressed so far. In this study, we investigated by an original approach the mechanisms that dynamically control both intra and extracellular Nodal availability during GBM tumorigenesis. Methods We characterized the dynamics of Nodal availability in both stem and more differentiated GBM cells through morphological analysis, immunofluorescence of Nodal protein and of early (EEA1 and Rab5) and late (Rab7 and Rab11) endocytic markers and Western Blot. Tukey’s test was used to analyze the prevalent correlation of Nodal with different endocytic markers inside specific differentiation states, and Sidak’s multiple comparisons test was used to compare the prevalence of Nodal/endocytic markers co-localization between two differentiation states of GBM cells. Paired t test was used to analyze the abundance of Nodal protein, in extra and intracellular media. Results The cytoplasmic distribution of Nodal was dynamically regulated and strongly correlated with the differentiation status of GBM cells. While Nodal-positive vesicle-like particles were symmetrically distributed in GBM stem cells (GBMsc), they presented asymmetric perinuclear localization in more differentiated GBM cells (mdGBM). Strikingly, when subjected to dedifferentiation, the distribution of Nodal in mdGBM shifted to a symmetric pattern. Moreover, the availability of both intracellular and secreted Nodal were downregulated upon GBMsc differentiation, with cells becoming elongated, negative for Nodal and positive for Nestin. Interestingly, the co-localization of Nodal with endosomal vesicles also depended on the differentiation status of the cells, with Nodal seen more packed in EEA1/Rab5 + vesicles in GBMsc and more in Rab7/11 + vesicles in mdGBM. Conclusions Our results show for the first time that Nodal availability relates to GBM cell differentiation status and that it is dynamically regulated by an endocytic pathway during GBM tumorigenesis, shedding new light on molecular pathways that might emerge as putative targets for Nodal signaling in GBM therapy. Electronic supplementary material The online version of this article (doi:10.1186/s12935-016-0324-3) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Maria Cecília Oliveira-Nunes
- Institute of Biomedical Sciences, Federal University of Rio de Janeiro, Av. Carlos Chagas Filho 373, F2-01, Rio de Janeiro, Rio de Janeiro 21941-902 Brazil
| | - Suzana Assad Kahn
- Institute for Stem Cell Biology and Regenerative Medicine, Stanford University, 265 Campus Drive, Stanford, California 94305 USA ; Institute of Biomedical Sciences, Federal University of Rio de Janeiro, Av. Carlos Chagas Filho 373, F1-20, Rio de Janeiro, Rio de Janeiro 21941-902 Brazil
| | - Ana Luiza de Oliveira Barbeitas
- Institute of Biomedical Sciences, Federal University of Rio de Janeiro, Av. Carlos Chagas Filho 373, F2-01, Rio de Janeiro, Rio de Janeiro 21941-902 Brazil
| | - Tania Cristina Leite de Sampaio E Spohr
- Institute of Biomedical Sciences, Federal University of Rio de Janeiro, Av. Carlos Chagas Filho 373, F1-20, Rio de Janeiro, Rio de Janeiro 21941-902 Brazil ; Instituto Estadual do Cérebro Paulo Niemeyer (IECPN), Rua do Rezende, 156, Rio de Janeiro, Rio de Janeiro 20231-092 Brazil
| | - Luiz Gustavo Feijó Dubois
- Institute of Biomedical Sciences, Federal University of Rio de Janeiro, Av. Carlos Chagas Filho 373, F1-20, Rio de Janeiro, Rio de Janeiro 21941-902 Brazil ; Instituto Estadual do Cérebro Paulo Niemeyer (IECPN), Rua do Rezende, 156, Rio de Janeiro, Rio de Janeiro 20231-092 Brazil
| | - Grasiella Maria Ventura Matioszek
- Institute of Biomedical Sciences, Federal University of Rio de Janeiro, Av. Carlos Chagas Filho 373, B1-29, Rio de Janeiro, Rio de Janeiro 21941-902 Brazil
| | - William Querido
- Institute of Biomedical Sciences, Federal University of Rio de Janeiro, Av. Carlos Chagas Filho 373, F2-30, Rio de Janeiro, Rio de Janeiro 21941-902 Brazil
| | - Loraine Campanati
- Institute of Biomedical Sciences, Federal University of Rio de Janeiro, Av. Carlos Chagas Filho 373, F1-20, Rio de Janeiro, Rio de Janeiro 21941-902 Brazil
| | - José Marques de Brito Neto
- Institute of Biomedical Sciences, Federal University of Rio de Janeiro, Av. Carlos Chagas Filho 373, F2-01, Rio de Janeiro, Rio de Janeiro 21941-902 Brazil
| | - Flavia Regina Souza Lima
- Institute of Biomedical Sciences, Federal University of Rio de Janeiro, Av. Carlos Chagas Filho 373, F1-20, Rio de Janeiro, Rio de Janeiro 21941-902 Brazil
| | - Vivaldo Moura-Neto
- Institute of Biomedical Sciences, Federal University of Rio de Janeiro, Av. Carlos Chagas Filho 373, F1-20, Rio de Janeiro, Rio de Janeiro 21941-902 Brazil ; Instituto Estadual do Cérebro Paulo Niemeyer (IECPN), Rua do Rezende, 156, Rio de Janeiro, Rio de Janeiro 20231-092 Brazil
| | - Katia Carneiro
- Institute of Biomedical Sciences, Federal University of Rio de Janeiro, Av. Carlos Chagas Filho 373, F2-01, Rio de Janeiro, Rio de Janeiro 21941-902 Brazil
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Zhai JS, Song JG, Zhu CH, Wu K, Yao Y, Li N. Expression of APPL1 is correlated with clinicopathologic characteristics and poor prognosis in patients with gastric cancer. ACTA ACUST UNITED AC 2016; 23:e95-e101. [PMID: 27122990 DOI: 10.3747/co.23.2775] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
BACKGROUND Although appl1 is overexpressed in many cancers, its status in gastric cancer (gc) is not known. In the present study, we used relevant pathologic and clinical data to investigate appl1 expression in patients with gc. METHODS In 47 gc and 27 non-gc surgical specimens, immunohistochemistry was used to detect the expression of appl1, and reverse-transcriptase polymerase chain reaction (rt-pcr) was used to detect messenger rna (mrna). A scatterplot visualized the relationship between survival time and mrna expression in gc patients. The log-rank test and other survival statistics were used to determine the association of appl1 expression with the pathologic features of the cancer and clinical outcomes. RESULTS In gc, appl1 was expressed in 28 of 47 specimens (59.6%), and in non-gc, it was expressed in 7 of 23 specimens (30.4%, p < 0.05). The expression of mrna in gc was 0.82 [95% confidence interval (ci): 0.78 to 0.86], and in non-gc, it was 0.73 (95% ci: 0.69 to 0.77; p < 0.05). Immunohistochemistry demonstrated that, in gc, appl1 expression was correlated with depth of infiltration (p = 0.005), lymph node metastasis (p = 0.017), and TNM stage (p = 0.022), but not with pathologic type (p = 0.41). Testing by rt-pcr demonstrated that, in gc, appl1 mrna expression was correlated with depth of infiltration (p = 0.042), lymph node metastasis (p = 0.031), and TNM stage (p = 0.04), but again, not with pathologic type (p = 0.98). The correlation coefficient between survival time and mrna expression was -0.83 (p < 0.01). Overexpression of appl1 protein (hazard ratio: 3.88; 95% ci: 1.07 to 14.09) and mrna (hazard ratio: 4.23; 95% ci: 3.09 to 15.11) was a risk factor for death in patients with gc. CONCLUSIONS Expression of appl1 is increased in gc. Overexpression is prognostic for a lethal outcome.
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Affiliation(s)
- J S Zhai
- Postgraduate Team, Chinese pla General Hospital, Medical School of Chinese pla, Beijing, P.R.C.;; Department of Gastroenterology, Chinese pla 309 Hospital, Beijing, P.R.C
| | - J G Song
- Department of Gastroenterology, Chinese pla 309 Hospital, Beijing, P.R.C
| | - C H Zhu
- Department of Gastroenterology, Chinese pla 309 Hospital, Beijing, P.R.C
| | - K Wu
- Department of Gastroenterology, Chinese pla 309 Hospital, Beijing, P.R.C
| | - Y Yao
- Department of Gastroenterology, Chinese pla 309 Hospital, Beijing, P.R.C
| | - N Li
- Postgraduate Team, Chinese pla General Hospital, Medical School of Chinese pla, Beijing, P.R.C.;; Department of Gastroenterology, Chinese pla 309 Hospital, Beijing, P.R.C
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Chen T, Xu C, Chen J, Ding C, Xu Z, Li C, Zhao J. MicroRNA-203 inhibits cellular proliferation and invasion by targeting Bmi1 in non-small cell lung cancer. Oncol Lett 2015; 9:2639-2646. [PMID: 26137120 DOI: 10.3892/ol.2015.3080] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2014] [Accepted: 03/03/2015] [Indexed: 12/11/2022] Open
Abstract
MicroRNAs are proposed to serve vital functions in the regulation of tumor progression and invasion. However, the expression levels of miR-203 in non-small cell lung cancer (NSCLC) and its clinical significance remain unknown. In the present study, the association between B-cell-specific moloney murine leukemia virus insertion site 1 (Bmi1) and miR-203 was investigated. miR-203 was demonstrated to act as a tumor suppressor by regulating the expression of Bmi1. miR-203 expression levels were downregulated in NSCLC tissues while Bmi1 expression was upregulated in NSCLC tissues and cell lines. Furthermore, downregulated Bmi1 or enhanced miR-203 expression inhibited NSCLC cell proliferation and invasion in vitro. In addition, a dual-luciferase reporter assay was performed, which identified Bmi1 as a novel target of miR-203. In conclusion, the present study demonstrated that miR-203 functions as a tumor suppressor and is important in inhibiting the proliferation of NSCLC cells through targeting Bmi1. These findings indicate that miR-203 may be useful as a novel potential therapeutic target for NSCLC.
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Affiliation(s)
- Tengfei Chen
- Department of Thoracic and Cardiovascular Surgery, The First Affiliated Hospital of Soochow University, Medical College of Soochow University, Suzhou, Jiangsu 215006, P.R. China ; Suzhou Key Laboratory for Molecular Cancer Genetics, Suzhou, Jiangsu 215123, P.R. China
| | - Chun Xu
- Department of Thoracic and Cardiovascular Surgery, The First Affiliated Hospital of Soochow University, Medical College of Soochow University, Suzhou, Jiangsu 215006, P.R. China ; Suzhou Key Laboratory for Molecular Cancer Genetics, Suzhou, Jiangsu 215123, P.R. China
| | - Jun Chen
- Department of Thoracic and Cardiovascular Surgery, The First Affiliated Hospital of Soochow University, Medical College of Soochow University, Suzhou, Jiangsu 215006, P.R. China ; Suzhou Key Laboratory for Molecular Cancer Genetics, Suzhou, Jiangsu 215123, P.R. China
| | - Cheng Ding
- Department of Thoracic and Cardiovascular Surgery, The First Affiliated Hospital of Soochow University, Medical College of Soochow University, Suzhou, Jiangsu 215006, P.R. China ; Suzhou Key Laboratory for Molecular Cancer Genetics, Suzhou, Jiangsu 215123, P.R. China
| | - Zhenlei Xu
- Department of Thoracic and Cardiovascular Surgery, The First Affiliated Hospital of Soochow University, Medical College of Soochow University, Suzhou, Jiangsu 215006, P.R. China ; Suzhou Key Laboratory for Molecular Cancer Genetics, Suzhou, Jiangsu 215123, P.R. China
| | - Chang Li
- Department of Thoracic and Cardiovascular Surgery, The First Affiliated Hospital of Soochow University, Medical College of Soochow University, Suzhou, Jiangsu 215006, P.R. China ; Suzhou Key Laboratory for Molecular Cancer Genetics, Suzhou, Jiangsu 215123, P.R. China
| | - Jun Zhao
- Department of Thoracic and Cardiovascular Surgery, The First Affiliated Hospital of Soochow University, Medical College of Soochow University, Suzhou, Jiangsu 215006, P.R. China ; Suzhou Key Laboratory for Molecular Cancer Genetics, Suzhou, Jiangsu 215123, P.R. China
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Díaz J, Mendoza P, Silva P, Quest AFG, Torres VA. A novel caveolin-1/p85α/Rab5/Tiam1/Rac1 signaling axis in tumor cell migration and invasion. Commun Integr Biol 2014; 7:972850. [PMID: 26842651 PMCID: PMC4594484 DOI: 10.4161/19420889.2014.972850] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2014] [Accepted: 07/14/2014] [Indexed: 12/13/2022] Open
Abstract
The small GTPase Rab5 has been frequently studied in the context of intracellular trafficking, but evidence obtained more recently has implicated Rab5 as a critical regulator of cell adhesion, migration and invasion in both normal and tumor cells. These recent findings showing that Rab5 promotes Rac1 activation and focal adhesion dynamics have highlighted the question as to what the upstream regulators of Rab5 activity might be and how these are connected to cell migration. The efforts to shed light on this issue identified in metastatic cancer cells a novel Caveolin‑1/p85α/Rab5/Tiam1/Rac1 signaling axis relevant to cancer cell migration and invasion. In this addendum, we highlight aspects concerning Rab5 regulation in this context.
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Affiliation(s)
- Jorge Díaz
- Institute for Research in Dental Sciences;
Faculty of Dentistry; Universidad de Chile;
Santiago, Chile
- Center for Molecular Studies of the Cell
(CEMC); Advanced Center for Chronic Diseases (ACCDiS); Cell
and Molecular Biology Program; Biomedical Sciences Institute (ICBM);
Faculty of Medicine; Universidad de Chile; Santiago,
Chile
| | - Pablo Mendoza
- Institute for Research in Dental Sciences;
Faculty of Dentistry; Universidad de Chile;
Santiago, Chile
| | - Patricio Silva
- Institute for Research in Dental Sciences;
Faculty of Dentistry; Universidad de Chile;
Santiago, Chile
| | - Andrew FG Quest
- Center for Molecular Studies of the Cell
(CEMC); Advanced Center for Chronic Diseases (ACCDiS); Cell
and Molecular Biology Program; Biomedical Sciences Institute (ICBM);
Faculty of Medicine; Universidad de Chile; Santiago,
Chile
| | - Vicente A Torres
- Institute for Research in Dental Sciences;
Faculty of Dentistry; Universidad de Chile;
Santiago, Chile
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