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Freitas LAB, Sousa C, Lima BS, Duarte D, Gomes PATDM, Ramos CGC, Costa VDCM, Pitta MGDR, Rêgo MJBDM, de Simone CA, Videira M, Leite ACL. Thiazolyl-isatin derivatives: Synthesis, in silico studies, in vitro biological profile against breast cancer cells, mRNA expression, P-gp modulation, and interactions of Akt2 and VIM proteins. Chem Biol Interact 2024; 394:110954. [PMID: 38518852 DOI: 10.1016/j.cbi.2024.110954] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2023] [Revised: 02/29/2024] [Accepted: 03/10/2024] [Indexed: 03/24/2024]
Abstract
The literature reports that thiazole and isatin nuclei present a range of biological activities, with an emphasis on anticancer activity. Therefore, our proposal was to make a series of compounds using the molecular hybridization strategy, which has been used by our research group, producing hybrid molecules containing the thiazole and isatin nuclei. After structural planning and synthesis, the compounds were characterized and evaluated in vitro against breast cancer cell lines (T-47D, MCF-7 and MDA-MB-231) and against normal cells (PBMC). The activity profile on membrane proteins involved in chemoresistance and tumorigenic signaling proteins was also evaluated. Among the compounds tested, the compounds 4c and 4a stood out with IC50 values of 1.23 and 1.39 μM, respectively, against the MDA-MB-231 cell line. Both compounds exhibited IC50 values of 0.45 μM for the MCF-7 cell line. Compounds 4a and 4c significantly decreased P-gp mRNA expression levels in MCF-7, 4 and 2 folds respectively. Regarding the impact on tumorigenic signaling proteins, compound 4a inhibited Akt2 in MDA-MB-231 and compound 4c inhibited the mRNA expression of VIM in MCF-7.
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Affiliation(s)
- Luiz Alberto Barros Freitas
- Departamento de Ciências Farmacêuticas, Centro de Ciências da Saúde, Universidade Federal de Pernambuco, 50740-520, Recife, PE, Brazil
| | - Carolina Sousa
- Pharmacological and Regulatory Sciences Group (PharmRegSci), Research Institute for Medicines (iMed.ULisboa), Faculdade de Farmácia da Universidade de Lisboa, Lisbon, Portugal
| | - Beatriz Silva Lima
- Pharmacological and Regulatory Sciences Group (PharmRegSci), Research Institute for Medicines (iMed.ULisboa), Faculdade de Farmácia da Universidade de Lisboa, Lisbon, Portugal
| | - Denise Duarte
- Global Health and Tropical Medicine, GHTM, Associate Laboratory in Translation and Innovation Towards Global Health, LA-REAL, Instituto de Higiene e Medicina Tropical, IHMT, Universidade NOVA de Lisboa, UNL, 1349-008, Lisboa, Portugal
| | | | - Camila Gabriela Costa Ramos
- Departamento de Ciências Farmacêuticas, Centro de Ciências da Saúde, Universidade Federal de Pernambuco, 50740-520, Recife, PE, Brazil
| | | | - Maira Galdino da Rocha Pitta
- Núcleo de Pesquisa em Inovação Terapêutica Suely Galdino, Universidade Federal de Pernambuco, 50670-901, Recife, PE, Brazil
| | | | - Carlos Alberto de Simone
- Departamento de Física e Informática, Instituto de Física de São Carlos, Universidade de São Paulo, 13560-970, São Carlos, SP, Brazil
| | - Mafalda Videira
- Pharmacological and Regulatory Sciences Group (PharmRegSci), Research Institute for Medicines (iMed.ULisboa), Faculdade de Farmácia da Universidade de Lisboa, Lisbon, Portugal
| | - Ana Cristina Lima Leite
- Departamento de Ciências Farmacêuticas, Centro de Ciências da Saúde, Universidade Federal de Pernambuco, 50740-520, Recife, PE, Brazil.
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Zhang T, Chen Z, Xie L, Xu R, Chen L, Jia T, Shi W, Wang Y, Song Y, Han Q, Xia X, Yuan T, Zhang J. A fusion protein of vimentin with Fc fragment inhibits Japanese encephalitis virus replication. Front Vet Sci 2024; 11:1368725. [PMID: 38500602 PMCID: PMC10944967 DOI: 10.3389/fvets.2024.1368725] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Accepted: 02/21/2024] [Indexed: 03/20/2024] Open
Abstract
Japanese encephalitis virus (JEV), a member of the Flaviviridae family and a flavivirus, is known to induce acute encephalitis. Vimentin protein has been identified as a potential receptor for JEV, engaging in interactions with the viral membrane protein. The Fc fragment, an integral constituent of immunoglobulins, plays a crucial role in antigen recognition by dendritic cells (DCs) or phagocytes, leading to subsequent antigen presentation, cytotoxicity, or phagocytosis. In this study, we fused the receptor of JEV vimentin with the Fc fragment of IgG and expressed the resulting vimentin-Fc fusion protein in Escherichia coli. Pull-down experiments demonstrated the binding ability of the vimentin-Fc fusion protein to JEV virion in vitro. Additionally, we conducted inhibition assays at the cellular level, revealing the ability of vimentin-Fc protein suppressing JEV replication, it may be a promising passive immunotherapy agent for JEV. These findings pave the way for potential therapeutic strategies against JEV.
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Affiliation(s)
- Taoping Zhang
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, China
- Yunnan Provincial Key Laboratory of Clinical Virology, The First People's Hospital of Yunnan Province, Kunming, China
- Yunnan Province Clinical Research Center for Gynecological and Obstetric Disease, Kunming, China
| | - Zhixin Chen
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, China
| | - Lyu Xie
- Institute of Basic Medical Sciences, School of Basic Medicine, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, China
| | - Ruixian Xu
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, China
| | - Lu Chen
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, China
| | - Ting Jia
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, China
| | - Wengang Shi
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, China
| | - Yongbo Wang
- Department of Clinical Laboratory, The First People's Hospital of Yunnan Province, Kunming, China
| | - Yuzhu Song
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, China
| | - Qinqin Han
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, China
| | - Xueshan Xia
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, China
| | - Tao Yuan
- Yunnan Provincial Key Laboratory of Clinical Virology, The First People's Hospital of Yunnan Province, Kunming, China
- Department of Gynecology, The First People's Hospital of Yunnan Province, Kunming, China
| | - Jinyang Zhang
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, China
- Yunnan Province Clinical Research Center for Gynecological and Obstetric Disease, Kunming, China
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Suprewicz Ł, Zakrzewska M, Okła S, Głuszek K, Sadzyńska A, Deptuła P, Fiedoruk K, Bucki R. Extracellular vimentin as a modulator of the immune response and an important player during infectious diseases. Immunol Cell Biol 2024; 102:167-178. [PMID: 38211939 DOI: 10.1111/imcb.12721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2023] [Revised: 11/27/2023] [Accepted: 12/21/2023] [Indexed: 01/13/2024]
Abstract
Vimentin, an intermediate filament protein primarily recognized for its intracellular role in maintaining cellular structure, has recently garnered increased attention and emerged as a pivotal extracellular player in immune regulation and host-pathogen interactions. While the functions of extracellular vimentin were initially overshadowed by its cytoskeletal role, accumulating evidence now highlights its significance in diverse physiological and pathological events. This review explores the multifaceted role of extracellular vimentin in modulating immune responses and orchestrating interactions between host cells and pathogens. It delves into the mechanisms underlying vimentin's release into the extracellular milieu, elucidating its unconventional secretion pathways and identifying critical molecular triggers. In addition, the future perspectives of using extracellular vimentin in diagnostics and as a target protein in the treatment of diseases are discussed.
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Affiliation(s)
- Łukasz Suprewicz
- Department of Medical Microbiology and Nanobiomedical Engineering, Medical University of Białystok, Białystok, Poland
| | - Magdalena Zakrzewska
- Department of Medical Microbiology and Nanobiomedical Engineering, Medical University of Białystok, Białystok, Poland
| | - Sławomir Okła
- Institute of Medical Sciences, Collegium Medicum, Jan Kochanowski University of Kielce, Kielce, Poland
| | - Katarzyna Głuszek
- Institute of Medical Sciences, Collegium Medicum, Jan Kochanowski University of Kielce, Kielce, Poland
| | - Alicja Sadzyńska
- State Higher Vocational School of Prof. Edward F. Szczepanik in Suwałki, Suwałki, Poland
| | - Piotr Deptuła
- Independent Laboratory of Nanomedicine, Medical University of Białystok, Białystok, Poland
| | - Krzysztof Fiedoruk
- Department of Medical Microbiology and Nanobiomedical Engineering, Medical University of Białystok, Białystok, Poland
| | - Robert Bucki
- Department of Medical Microbiology and Nanobiomedical Engineering, Medical University of Białystok, Białystok, Poland
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Cabrera-Rodríguez R, Pérez-Yanes S, Lorenzo-Sánchez I, Trujillo-González R, Estévez-Herrera J, García-Luis J, Valenzuela-Fernández A. HIV Infection: Shaping the Complex, Dynamic, and Interconnected Network of the Cytoskeleton. Int J Mol Sci 2023; 24:13104. [PMID: 37685911 PMCID: PMC10487602 DOI: 10.3390/ijms241713104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Revised: 08/21/2023] [Accepted: 08/22/2023] [Indexed: 09/10/2023] Open
Abstract
HIV-1 has evolved a plethora of strategies to overcome the cytoskeletal barrier (i.e., actin and intermediate filaments (AFs and IFs) and microtubules (MTs)) to achieve the viral cycle. HIV-1 modifies cytoskeletal organization and dynamics by acting on associated adaptors and molecular motors to productively fuse, enter, and infect cells and then traffic to the cell surface, where virions assemble and are released to spread infection. The HIV-1 envelope (Env) initiates the cycle by binding to and signaling through its main cell surface receptors (CD4/CCR5/CXCR4) to shape the cytoskeleton for fusion pore formation, which permits viral core entry. Then, the HIV-1 capsid is transported to the nucleus associated with cytoskeleton tracks under the control of specific adaptors/molecular motors, as well as HIV-1 accessory proteins. Furthermore, HIV-1 drives the late stages of the viral cycle by regulating cytoskeleton dynamics to assure viral Pr55Gag expression and transport to the cell surface, where it assembles and buds to mature infectious virions. In this review, we therefore analyze how HIV-1 generates a cell-permissive state to infection by regulating the cytoskeleton and associated factors. Likewise, we discuss the relevance of this knowledge to understand HIV-1 infection and pathogenesis in patients and to develop therapeutic strategies to battle HIV-1.
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Affiliation(s)
- Romina Cabrera-Rodríguez
- Laboratorio de Inmunología Celular y Viral, Unidad de Farmacología, Sección de Medicina, Facultad de Ciencias de la Salud, Universidad de La Laguna (ULL), 38200 La Laguna, Spain; (R.C.-R.); (S.P.-Y.); (I.L.-S.); (R.T.-G.); (J.E.-H.); (J.G.-L.)
| | - Silvia Pérez-Yanes
- Laboratorio de Inmunología Celular y Viral, Unidad de Farmacología, Sección de Medicina, Facultad de Ciencias de la Salud, Universidad de La Laguna (ULL), 38200 La Laguna, Spain; (R.C.-R.); (S.P.-Y.); (I.L.-S.); (R.T.-G.); (J.E.-H.); (J.G.-L.)
| | - Iria Lorenzo-Sánchez
- Laboratorio de Inmunología Celular y Viral, Unidad de Farmacología, Sección de Medicina, Facultad de Ciencias de la Salud, Universidad de La Laguna (ULL), 38200 La Laguna, Spain; (R.C.-R.); (S.P.-Y.); (I.L.-S.); (R.T.-G.); (J.E.-H.); (J.G.-L.)
| | - Rodrigo Trujillo-González
- Laboratorio de Inmunología Celular y Viral, Unidad de Farmacología, Sección de Medicina, Facultad de Ciencias de la Salud, Universidad de La Laguna (ULL), 38200 La Laguna, Spain; (R.C.-R.); (S.P.-Y.); (I.L.-S.); (R.T.-G.); (J.E.-H.); (J.G.-L.)
- Analysis Department, Faculty of Mathematics, Universidad de La Laguna (ULL), 38200 La Laguna, Spain
| | - Judith Estévez-Herrera
- Laboratorio de Inmunología Celular y Viral, Unidad de Farmacología, Sección de Medicina, Facultad de Ciencias de la Salud, Universidad de La Laguna (ULL), 38200 La Laguna, Spain; (R.C.-R.); (S.P.-Y.); (I.L.-S.); (R.T.-G.); (J.E.-H.); (J.G.-L.)
| | - Jonay García-Luis
- Laboratorio de Inmunología Celular y Viral, Unidad de Farmacología, Sección de Medicina, Facultad de Ciencias de la Salud, Universidad de La Laguna (ULL), 38200 La Laguna, Spain; (R.C.-R.); (S.P.-Y.); (I.L.-S.); (R.T.-G.); (J.E.-H.); (J.G.-L.)
| | - Agustín Valenzuela-Fernández
- Laboratorio de Inmunología Celular y Viral, Unidad de Farmacología, Sección de Medicina, Facultad de Ciencias de la Salud, Universidad de La Laguna (ULL), 38200 La Laguna, Spain; (R.C.-R.); (S.P.-Y.); (I.L.-S.); (R.T.-G.); (J.E.-H.); (J.G.-L.)
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Talà A, Guerra F, Calcagnile M, Romano R, Resta SC, Paiano A, Chiariello M, Pizzolante G, Bucci C, Alifano P. HrpA anchors meningococci to the dynein motor and affects the balance between apoptosis and pyroptosis. J Biomed Sci 2022; 29:45. [PMID: 35765029 PMCID: PMC9241232 DOI: 10.1186/s12929-022-00829-8] [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: 02/09/2022] [Accepted: 06/22/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND In Neisseria meningitidis the HrpA/HrpB two-partner secretion system (TPS) was implicated in diverse functions including meningococcal competition, biofilm formation, adherence to epithelial cells, intracellular survival and vacuolar escape. These diverse functions could be attributed to distinct domains of secreted HrpA. METHODS A yeast two-hybrid screening, in vitro pull-down assay and immunofluorescence microscopy experiments were used to investigate the interaction between HrpA and the dynein light-chain, Tctex-type 1 (DYNLT1). In silico modeling was used to analyze HrpA structure. Western blot analysis was used to investigate apoptotic and pyroptotic markers. RESULTS The HrpA carboxy-terminal region acts as a manganese-dependent cell lysin, while the results of a yeast two-hybrid screening demonstrated that the HrpA middle region has the ability to bind the dynein light-chain, Tctex-type 1 (DYNLT1). This interaction was confirmed by in vitro pull-down assay and immunofluorescence microscopy experiments showing co-localization of N. meningitidis with DYNLT1 in infected epithelial cells. In silico modeling revealed that the HrpA-M interface interacting with the DYNLT1 has similarity with capsid proteins of neurotropic viruses that interact with the DYNLT1. Indeed, we found that HrpA plays a key role in infection of and meningococcal trafficking within neuronal cells, and is implicated in the modulation of the balance between apoptosis and pyroptosis. CONCLUSIONS Our findings revealed that N. meningitidis is able to effectively infect and survive in neuronal cells, and that this ability is dependent on HrpA, which establishes a direct protein-protein interaction with DYNLTI in these cells, suggesting that the HrpA interaction with dynein could be fundamental for N. meningitidis spreading inside the neurons. Moreover, we found that the balance between apoptotic and pyroptotic pathways is heavily affected by HrpA.
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Affiliation(s)
- Adelfia Talà
- Department of Biological and Environmental Sciences and Technologies (DiSTeBA), University of Salento, Via Provinciale Monteroni n. 165, 73100, Lecce, Italy
| | - Flora Guerra
- Department of Biological and Environmental Sciences and Technologies (DiSTeBA), University of Salento, Via Provinciale Monteroni n. 165, 73100, Lecce, Italy
| | - Matteo Calcagnile
- Department of Biological and Environmental Sciences and Technologies (DiSTeBA), University of Salento, Via Provinciale Monteroni n. 165, 73100, Lecce, Italy
| | - Roberta Romano
- Department of Biological and Environmental Sciences and Technologies (DiSTeBA), University of Salento, Via Provinciale Monteroni n. 165, 73100, Lecce, Italy
| | - Silvia Caterina Resta
- Department of Biological and Environmental Sciences and Technologies (DiSTeBA), University of Salento, Via Provinciale Monteroni n. 165, 73100, Lecce, Italy
| | - Aurora Paiano
- Department of Biological and Environmental Sciences and Technologies (DiSTeBA), University of Salento, Via Provinciale Monteroni n. 165, 73100, Lecce, Italy
| | - Mario Chiariello
- Core Research Laboratory-Siena, Institute for Cancer Research and Prevention (ISPRO), 53100, Siena, Italy.,Institute of Clinical Physiology (IFC), National Research Council (CNR), 53100, Siena, Italy
| | - Graziano Pizzolante
- Department of Biological and Environmental Sciences and Technologies (DiSTeBA), University of Salento, Via Provinciale Monteroni n. 165, 73100, Lecce, Italy
| | - Cecilia Bucci
- Department of Biological and Environmental Sciences and Technologies (DiSTeBA), University of Salento, Via Provinciale Monteroni n. 165, 73100, Lecce, Italy.
| | - Pietro Alifano
- Department of Biological and Environmental Sciences and Technologies (DiSTeBA), University of Salento, Via Provinciale Monteroni n. 165, 73100, Lecce, Italy.
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Usman S, Aldehlawi H, Nguyen TKN, Teh MT, Waseem A. Impact of N-Terminal Tags on De Novo Vimentin Intermediate Filament Assembly. Int J Mol Sci 2022; 23:ijms23116349. [PMID: 35683030 PMCID: PMC9181571 DOI: 10.3390/ijms23116349] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Revised: 06/02/2022] [Accepted: 06/04/2022] [Indexed: 02/01/2023] Open
Abstract
Vimentin, a type III intermediate filament protein, is found in most cells along with microfilaments and microtubules. It has been shown that the head domain folds back to associate with the rod domain and this association is essential for filament assembly. The N-terminally tagged vimentin has been widely used to label the cytoskeleton in live cell imaging. Although there is previous evidence that EGFP tagged vimentin fails to form filaments but is able to integrate into a pre-existing network, no study has systematically investigated or established a molecular basis for this observation. To determine whether a tag would affect de novo filament assembly, we used vimentin fused at the N-terminus with two different sized tags, AcGFP (239 residues, 27 kDa) and 3 × FLAG (22 residues; 2.4 kDa) to assemble into filaments in two vimentin-deficient epithelial cells, MCF-7 and A431. We showed that regardless of tag size, N-terminally tagged vimentin aggregated into globules with a significant proportion co-aligning with β-catenin at cell–cell junctions. However, the tagged vimentin aggregates could form filaments upon adding untagged vimentin at a ratio of 1:1 or when introduced into cells containing pre-existing filaments. The resultant filament network containing a mixture of tagged and untagged vimentin was less stable compared to that formed by only untagged vimentin. The data suggest that placing a tag at the N-terminus may create steric hinderance in case of a large tag (AcGFP) or electrostatic repulsion in case of highly charged tag (3 × FLAG) perhaps inducing a conformational change, which deleteriously affects the association between head and rod domains. Taken together our results shows that a free N-terminus is essential for filament assembly as N-terminally tagged vimentin is not only incapable of forming filaments, but it also destabilises when integrated into a pre-existing network.
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Affiliation(s)
- Saima Usman
- Centre for Oral Immunobiology and Regenerative Medicine, Institute of Dentistry, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, Newark Street, London E1 2AT, UK; (S.U.); (T.K.N.N.); (M.-T.T.)
| | - Hebah Aldehlawi
- Department of Oral Diagnostic Sciences, Division of Oral Pathology and Medicine, Faculty of Dentistry, King Abdul Aziz University, Jeddah 21589, Saudi Arabia;
| | - Thuan Khanh Ngoc Nguyen
- Centre for Oral Immunobiology and Regenerative Medicine, Institute of Dentistry, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, Newark Street, London E1 2AT, UK; (S.U.); (T.K.N.N.); (M.-T.T.)
| | - Muy-Teck Teh
- Centre for Oral Immunobiology and Regenerative Medicine, Institute of Dentistry, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, Newark Street, London E1 2AT, UK; (S.U.); (T.K.N.N.); (M.-T.T.)
| | - Ahmad Waseem
- Centre for Oral Immunobiology and Regenerative Medicine, Institute of Dentistry, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, Newark Street, London E1 2AT, UK; (S.U.); (T.K.N.N.); (M.-T.T.)
- Centre for Immunobiology and Regenerative Medicine, Blizard Institute, 4 Newark Street, London E1 2AT, UK
- Correspondence: ; Tel.: +44-207-882-2387; Fax: +44-207-882-7137
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Surolia R, Antony VB. Pathophysiological Role of Vimentin Intermediate Filaments in Lung Diseases. Front Cell Dev Biol 2022; 10:872759. [PMID: 35573702 PMCID: PMC9096236 DOI: 10.3389/fcell.2022.872759] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Accepted: 04/13/2022] [Indexed: 11/17/2022] Open
Abstract
Vimentin intermediate filaments, a type III intermediate filament, are among the most widely studied IFs and are found abundantly in mesenchymal cells. Vimentin intermediate filaments localize primarily in the cytoplasm but can also be found on the cell surface and extracellular space. The cytoplasmic vimentin is well-recognized for its role in providing mechanical strength and regulating cell migration, adhesion, and division. The post-translationally modified forms of Vimentin intermediate filaments have several implications in host-pathogen interactions, cancers, and non-malignant lung diseases. This review will analyze the role of vimentin beyond just the epithelial to mesenchymal transition (EMT) marker highlighting its role as a regulator of host-pathogen interactions and signaling pathways for the pathophysiology of various lung diseases. In addition, we will also examine the clinically relevant anti-vimentin compounds and antibodies that could potentially interfere with the pathogenic role of Vimentin intermediate filaments in lung disease.
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Chadet S, Allard J, Brisson L, Lopez-Charcas O, Lemoine R, Heraud A, Lerondel S, Guibon R, Fromont G, Le Pape A, Angoulvant D, Jiang LH, Murrell-Lagnado R, Roger S. P2x4 receptor promotes mammary cancer progression by sustaining autophagy and associated mesenchymal transition. Oncogene 2022; 41:2920-2931. [DOI: 10.1038/s41388-022-02297-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Revised: 03/18/2022] [Accepted: 03/24/2022] [Indexed: 12/22/2022]
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Yu J, Li X, Zhou D, Liu X, He X, Huang SH, Wu Q, Zhu L, Yu L, Yao J, Zhang B, Zhao W. Vimentin Inhibits Dengue Virus Type 2 Invasion of the Blood-Brain Barrier. Front Cell Infect Microbiol 2022; 12:868407. [PMID: 35433510 PMCID: PMC9005901 DOI: 10.3389/fcimb.2022.868407] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Accepted: 03/03/2022] [Indexed: 12/28/2022] Open
Abstract
Dengue virus (DENV) causes dengue fever, which is prevalent in the tropical and subtropical regions, and in recent years, has resulted in several major epidemics. Vimentin, a cytoskeletal component involved in DENV infection, is significantly reorganized during infection. However, the mechanism underlying the association between DENV infection and vimentin is still poorly understood. We generated vimentin-knockout (Vim-KO) human brain microvascular endothelial cells (HBMECs) and a Vim-KO SV129 suckling mouse model, combining the dynamic vimentin changes observed in vitro and differences in disease course in vivo, to clarify the role of vimentin in DENV-2 infection. We found that the phosphorylation and solubility of vimentin changed dynamically during DENV-2 infection of HBMECs, suggesting the regulation of vimentin by DENV-2 infection. The similar trends observed in the phosphorylation and solubility of vimentin showed that these characteristics are related. Compared with that in control cells, the DENV-2 viral load was significantly increased in Vim-KO HBMECs, and after DENV-2 infection, Vim-KO SV129 mice displayed more severe disease signs than wild-type SV129 mice, as well as higher viral loads in their serum and brain tissue, demonstrating that vimentin can inhibit DENV-2 infection. Moreover, Vim-KO SV129 mice had more disordered cerebral cortical nerve cells, confirming that Vim-KO mice were more susceptible to DENV-2 infection, which causes severe brain damage. The findings of our study help clarify the mechanism by which vimentin inhibits DENV-2 infection and provides guidance for antiviral treatment strategies for DENV infections.
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Affiliation(s)
- Jianhai Yu
- Biological Safety Laboratory of Level 3 (BSL-3) Laboratory (Guangdong), Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, China
| | - Xujuan Li
- Biological Safety Laboratory of Level 3 (BSL-3) Laboratory (Guangdong), Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, China
| | - Dongrui Zhou
- Biological Safety Laboratory of Level 3 (BSL-3) Laboratory (Guangdong), Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, China
| | - Xuling Liu
- Biological Safety Laboratory of Level 3 (BSL-3) Laboratory (Guangdong), Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, China
| | - Xiaoen He
- Biological Safety Laboratory of Level 3 (BSL-3) Laboratory (Guangdong), Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, China
| | - Sheng-He Huang
- Saban Research Institute of Children’s Hospital Los Angeles, Department of Pediatrics, University of Southern California, Los Angeles, CA, United States
| | - Qinghua Wu
- Biological Safety Laboratory of Level 3 (BSL-3) Laboratory (Guangdong), Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, China
| | - Li Zhu
- Biological Safety Laboratory of Level 3 (BSL-3) Laboratory (Guangdong), Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, China
| | - Linzhong Yu
- Department of Traditional Chinese Medicine, Southern Medical University, Guangzhou, China
| | - Jinxiu Yao
- Department of Laboratory, People's Hospital of Yangjiang, Yangjiang, China
| | - Bao Zhang
- Biological Safety Laboratory of Level 3 (BSL-3) Laboratory (Guangdong), Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, China
- *Correspondence: Wei Zhao, ; Bao Zhang,
| | - Wei Zhao
- Biological Safety Laboratory of Level 3 (BSL-3) Laboratory (Guangdong), Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, China
- *Correspondence: Wei Zhao, ; Bao Zhang,
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Usman S, Waseem NH, Nguyen TKN, Mohsin S, Jamal A, Teh MT, Waseem A. Vimentin Is at the Heart of Epithelial Mesenchymal Transition (EMT) Mediated Metastasis. Cancers (Basel) 2021; 13:4985. [PMID: 34638469 PMCID: PMC8507690 DOI: 10.3390/cancers13194985] [Citation(s) in RCA: 148] [Impact Index Per Article: 49.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Revised: 09/29/2021] [Accepted: 10/02/2021] [Indexed: 12/12/2022] Open
Abstract
Epithelial-mesenchymal transition (EMT) is a reversible plethora of molecular events where epithelial cells gain the phenotype of mesenchymal cells to invade the surrounding tissues. EMT is a physiological event during embryogenesis (type I) but also happens during fibrosis (type II) and cancer metastasis (type III). It is a multifaceted phenomenon governed by the activation of genes associated with cell migration, extracellular matrix degradation, DNA repair, and angiogenesis. The cancer cells employ EMT to acquire the ability to migrate, resist therapeutic agents and escape immunity. One of the key biomarkers of EMT is vimentin, a type III intermediate filament that is normally expressed in mesenchymal cells but is upregulated during cancer metastasis. This review highlights the pivotal role of vimentin in the key events during EMT and explains its role as a downstream as well as an upstream regulator in this highly complex process. This review also highlights the areas that require further research in exploring the role of vimentin in EMT. As a cytoskeletal protein, vimentin filaments support mechanical integrity of the migratory machinery, generation of directional force, focal adhesion modulation and extracellular attachment. As a viscoelastic scaffold, it gives stress-bearing ability and flexible support to the cell and its organelles. However, during EMT it modulates genes for EMT inducers such as Snail, Slug, Twist and ZEB1/2, as well as the key epigenetic factors. In addition, it suppresses cellular differentiation and upregulates their pluripotent potential by inducing genes associated with self-renewability, thus increasing the stemness of cancer stem cells, facilitating the tumour spread and making them more resistant to treatments. Several missense and frameshift mutations reported in vimentin in human cancers may also contribute towards the metastatic spread. Therefore, we propose that vimentin should be a therapeutic target using molecular technologies that will curb cancer growth and spread with reduced mortality and morbidity.
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Affiliation(s)
- Saima Usman
- Centre for Oral Immunobiology and Regenerative Medicine, Institute of Dentistry, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, Turner Str., London E1 2AT, UK; (S.U.); (T.K.N.N.); (A.J.); (M.-T.T.)
| | - Naushin H. Waseem
- UCL Institute of Ophthalmology, 11-43 Bath Str., London EC1V 9EL, UK;
| | - Thuan Khanh Ngoc Nguyen
- Centre for Oral Immunobiology and Regenerative Medicine, Institute of Dentistry, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, Turner Str., London E1 2AT, UK; (S.U.); (T.K.N.N.); (A.J.); (M.-T.T.)
| | - Sahar Mohsin
- Department of Anatomy, College of Medicine and Health Sciences, United Arab Emirates University, Al Ain 17666, United Arab Emirates;
| | - Ahmad Jamal
- Centre for Oral Immunobiology and Regenerative Medicine, Institute of Dentistry, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, Turner Str., London E1 2AT, UK; (S.U.); (T.K.N.N.); (A.J.); (M.-T.T.)
| | - Muy-Teck Teh
- Centre for Oral Immunobiology and Regenerative Medicine, Institute of Dentistry, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, Turner Str., London E1 2AT, UK; (S.U.); (T.K.N.N.); (A.J.); (M.-T.T.)
| | - Ahmad Waseem
- Centre for Oral Immunobiology and Regenerative Medicine, Institute of Dentistry, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, Turner Str., London E1 2AT, UK; (S.U.); (T.K.N.N.); (A.J.); (M.-T.T.)
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11
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Yang L, Wu Z, Sun W, Luo P, Chen S, Chen Y, Yan W, Li Y, Wang C. CCNDBP1, a Prognostic Marker Regulated by DNA Methylation, Inhibits Aggressive Behavior in Dedifferentiated Liposarcoma via Repressing Epithelial Mesenchymal Transition. Front Oncol 2021; 11:687012. [PMID: 34631521 PMCID: PMC8493074 DOI: 10.3389/fonc.2021.687012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2021] [Accepted: 08/27/2021] [Indexed: 12/24/2022] Open
Abstract
The present study aimed to explore the prognostic value, function, and mechanism of CCNDBP1 in dedifferentiated liposarcoma (DDL). Immunohistochemistry staining was used to analyze the protein expression of CCNDBP1 in tissue specimens. After silencing CCNDBP1 in LPS853 and overexpressing CCNDBP1 in LPS510, CCK-8, clone formation, transwell migration, and invasion assays were used to detect cell proliferation, migration, and invasion ability. CCNDBP1-induced cell apoptosis was analyzed by flow cytometry. The altered expression of epithelial-mesenchymal transition (EMT)-related proteins were detected by Western blot. The methylation, gene expression, and clinical data of 58 samples with DDL were analyzed using the cancer genome atlas (TCGA) database. Low expression of CCNDBP1 was associated with a poor prognosis of patients with DDL and was considered an independent prognostic factor of the progression-free survival (PFS). CCNDBP1 significantly inhibited the clone formation, proliferation, migration, and invasion of cancer cells in vitro and promoted cancer cell apoptosis. CCNDBP1 could repress the pathological EMT, thereby inhibiting the malignant behaviors of DDL cells. The high degree of DNA methylation sites cg05194114 and cg22184989 could decrease the expression of CCNDBP1 and worsen the prognosis of DDL patients. This is the first study reporting that CCNDBP1 is a tumor suppressor gene of DDL and putative prognostic marker in DDL patients. CCNDBP1 might inhibit the ability of cell proliferation and invasion by repressing pathological EMT, and the expression of CCNDBP1 could be regulated by DNA methylation in DDL.
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Affiliation(s)
- Lingge Yang
- Department of Musculoskeletal Oncology, Fudan University Shanghai Cancer Center, Shanghai, China
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
| | - Zhiqiang Wu
- Department of Musculoskeletal Oncology, Fudan University Shanghai Cancer Center, Shanghai, China
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
| | - Wei Sun
- Department of Musculoskeletal Oncology, Fudan University Shanghai Cancer Center, Shanghai, China
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
| | - Peng Luo
- Department of Musculoskeletal Oncology, Fudan University Shanghai Cancer Center, Shanghai, China
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
| | - Shiqi Chen
- Department of Musculoskeletal Oncology, Fudan University Shanghai Cancer Center, Shanghai, China
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
| | - Yong Chen
- Department of Musculoskeletal Oncology, Fudan University Shanghai Cancer Center, Shanghai, China
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
| | - Wangjun Yan
- Department of Musculoskeletal Oncology, Fudan University Shanghai Cancer Center, Shanghai, China
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
| | - Yan Li
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
- Fudan University Shanghai Cancer Center, Key Laboratory of Medical Epigenetics and Metabolism, Institutes of Biomedical Sciences, Fudan University, Shanghai, China
| | - Chunmeng Wang
- Department of Musculoskeletal Oncology, Fudan University Shanghai Cancer Center, Shanghai, China
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
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Vimentin-Rab7a Pathway Mediates the Migration of MSCs and Lead to Therapeutic Effects on ARDS. Stem Cells Int 2021; 2021:9992381. [PMID: 34367295 PMCID: PMC8342148 DOI: 10.1155/2021/9992381] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2021] [Accepted: 07/14/2021] [Indexed: 01/29/2023] Open
Abstract
Acute respiratory distress syndrome (ARDS) is difficult to treat and has a high mortality rate. Mesenchymal stem cells (MSCs) have an important therapeutic effect in ARDS. While the mechanism of MSC migration to the lungs remains unclear, the role of MSCs is of great clinical significance. To this end, we constructed vimentin knockout mice, extracted bone MSCs from the mice, and used them for the treatment of LPS-induced ARDS. H&E staining and Masson staining of mouse lung tissue allowed us to assess the degree of damage and fibrosis of mouse lung tissue. By measuring serum TNF-α, TGF-β, and INF-γ, we were able to monitor the release of inflammatory factors. Finally, through immunoprecipitation and gene knockout experiments, we identified upstream molecules that regulate vimentin and elucidated the mechanism that mediates MSC migration. As a result, we found that MSCs from wild-type mice can significantly alleviate ARDS and reduce lung inflammation, while vimentin gene knockout reduced the therapeutic effect of MSCs in ARDS. Cytological experiments showed that vimentin gene knockout can significantly inhibit the migration of MSCs and showed that it changes the proliferation and differentiation status of MSCs. Further experiments found that vimentin's regulation of MSC migration is mainly mediated by Rab7a. Rab7a knockout blocked the migration of MSCs and weakened the therapeutic effect of MSCs in ARDS. In conclusion, we have shown that the Vimentin-Rab7a pathway mediates migration of MSCs and leads to therapeutic effects in ARDS.
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Mori K, Higurashi M, Ishikawa F, Shibanuma M. Rac1-mediated sustained β4 integrin level develops reattachment ability of breast cancer cells after anchorage loss. Cancer Sci 2021; 112:3205-3217. [PMID: 34036687 PMCID: PMC8353950 DOI: 10.1111/cas.14985] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Revised: 05/16/2021] [Accepted: 05/19/2021] [Indexed: 12/16/2022] Open
Abstract
Previously, we reported that non-apoptotic cell death was induced in non-malignant mammary epithelial cells (HMECs) upon loss of anchorage during 48 h incubation in suspension. In this study, we examined HMECs in suspension at an earlier time point and found that most of them lost attachment ability to substrata when replated, although >80% were alive. This suggested that HMECs lost reattachment ability (RA) prior to cell death upon detachment. Concomitant with the loss of RA, a decrease in the levels of β1 and β4 integrin was observed. In sharp contrast, breast cancer cells retained integrin levels, reattached to substrata, and formed colonies after exposure to anchorage loss as efficiently as those maintained under adherent conditions. Such RA of cancer cells is essential for the metastatic process, especially for establishing adhesion contact with ECM in the secondary organ after systemic circulation. Further analysis suggested that sustained levels of β4 integrin, which was mediated by Rac1, was critical for RA after anchorage loss and lung metastasis of breast cancer cells. In the cancer cells, persistent Rac1 activity enhanced escape of β4 integrin from lysosomal degradation depending on actin-related protein 2/3 and TBC1D2, a GTPase-activating protein of Rab7 GTPase. Notably, simultaneous high expression of ITGB4 and RAC1 was associated with poor prognosis in patients with breast cancer. Therefore, β4 integrin and Rac1 are attractive therapeutic targets to eliminate RA in cancer cells, thereby preventing the initial step of colonization at the secondary organ during metastasis.
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Affiliation(s)
- Kazunori Mori
- Division of Cancer Cell Biology, Department of Pharmaceutical Sciences, Showa University School of Pharmacy, Tokyo, Japan
| | - Masato Higurashi
- Division of Cancer Cell Biology, Department of Pharmaceutical Sciences, Showa University School of Pharmacy, Tokyo, Japan
| | - Fumihiro Ishikawa
- Division of Cancer Cell Biology, Department of Pharmaceutical Sciences, Showa University School of Pharmacy, Tokyo, Japan
| | - Motoko Shibanuma
- Division of Cancer Cell Biology, Department of Pharmaceutical Sciences, Showa University School of Pharmacy, Tokyo, Japan
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Romano R, Calcagnile M, Margiotta A, Franci L, Chiariello M, Alifano P, Bucci C. RAB7A Regulates Vimentin Phosphorylation through AKT and PAK. Cancers (Basel) 2021; 13:cancers13092220. [PMID: 34066419 PMCID: PMC8125308 DOI: 10.3390/cancers13092220] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Revised: 04/29/2021] [Accepted: 04/30/2021] [Indexed: 12/21/2022] Open
Abstract
Simple Summary RAB7A (RAs-related in Brain 7A) is a master regulator of intracellular traffic controlling transport to late endosomes and lysosomes, two organelles of the endocytic pathway important for degradation. Thanks to this function, RAB7A is also involved in cellular processes linked to cancer, such as apoptosis, cytoskeletal reorganization, and cell migration. Therefore, the interest in the role of RAB7A in cancer progression is increasing. Previously, we demonstrated that RAB7A regulates phosphorylation and assembly of vimentin, a cytoskeletal intermediate filament protein, which is also an important mesenchymal marker of cancer cells. The aim of the present study is the identification of the kinases responsible for vimentin phosphorylation whose activity is affected by the modulation of RAB7A expression. We found that RAB7A is able to regulate AKT (also called protein kinase B or PKB) and PAK1 (P21-Activated Kinase 1) and several of their downstream effectors, which control proliferation, apoptosis, survival, migration, and invasion. These data suggest that RAB7A could have a key role in cancer development. Abstract RAB7A is a small GTPase that controls the late endocytic pathway but also cell migration through RAC1 (Ras-related C3 botulinum toxin substrate 1) and vimentin. In fact, RAB7A regulates vimentin phosphorylation at different sites and vimentin assembly, and, in this study, we identified vimentin domains interacting with RAB7A. As several kinases could be responsible for vimentin phosphorylation, we investigated whether modulation of RAB7A expression affects the activity of these kinases. We discovered that RAB7A regulates AKT and PAK1, and we demonstrated that increased vimentin phosphorylation at Ser38 (Serine 38), observed upon RAB7A overexpression, is due to AKT activity. As AKT and PAK1 are key regulators of several cellular events, we investigated if RAB7A could have a role in these processes by modulating AKT and PAK1 activity. We found that RAB7A protein levels affected beta-catenin and caspase 9 expression. We also observed the downregulation of cofilin-1 and decreased matrix metalloproteinase 2 (MMP2) activity upon RAB7A silencing. Altogether these results demonstrate that RAB7A regulates AKT and PAK1 kinases, affecting their downstream effectors and the processes they regulate, suggesting that RAB7A could have a role in a number of cancer hallmarks.
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Affiliation(s)
- Roberta Romano
- Department of Biological and Environmental Sciences and Technologies (DiSTeBA), University of Salento, 73100 Lecce, Italy; (R.R.); (M.C.); (A.M.); (P.A.)
| | - Matteo Calcagnile
- Department of Biological and Environmental Sciences and Technologies (DiSTeBA), University of Salento, 73100 Lecce, Italy; (R.R.); (M.C.); (A.M.); (P.A.)
| | - Azzurra Margiotta
- Department of Biological and Environmental Sciences and Technologies (DiSTeBA), University of Salento, 73100 Lecce, Italy; (R.R.); (M.C.); (A.M.); (P.A.)
| | - Lorenzo Franci
- Istituto di Fisiologia Clinica (IFC), Consiglio Nazionale delle Ricerche (CNR), 53100 Siena, Italy; (L.F.); (M.C.)
- Core Research Laboratory (CRL), Istituto per lo Studio, La Prevenzione e la Rete Oncologica (ISPRO), 53100 Siena, Italy
- Department of Medical Biotechnologies, University of Siena, 53100 Siena, Italy
| | - Mario Chiariello
- Istituto di Fisiologia Clinica (IFC), Consiglio Nazionale delle Ricerche (CNR), 53100 Siena, Italy; (L.F.); (M.C.)
- Core Research Laboratory (CRL), Istituto per lo Studio, La Prevenzione e la Rete Oncologica (ISPRO), 53100 Siena, Italy
| | - Pietro Alifano
- Department of Biological and Environmental Sciences and Technologies (DiSTeBA), University of Salento, 73100 Lecce, Italy; (R.R.); (M.C.); (A.M.); (P.A.)
| | - Cecilia Bucci
- Department of Biological and Environmental Sciences and Technologies (DiSTeBA), University of Salento, 73100 Lecce, Italy; (R.R.); (M.C.); (A.M.); (P.A.)
- Correspondence: ; Tel.: +39-0832-298900
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15
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Fleissner F, Kumar S, Klein N, Wirth D, Dhiman R, Schneider D, Bonn M, Parekh SH. Tension Causes Unfolding of Intracellular Vimentin Intermediate Filaments. ACTA ACUST UNITED AC 2020; 4:e2000111. [DOI: 10.1002/adbi.202000111] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2019] [Revised: 09/18/2020] [Indexed: 12/27/2022]
Affiliation(s)
- Frederik Fleissner
- Department of Molecular Spectroscopy Max Planck Institute for Polymer Research Mainz 55128 Germany
| | - Sachin Kumar
- Department of Molecular Spectroscopy Max Planck Institute for Polymer Research Mainz 55128 Germany
- Department of Biomedical Engineering University of Texas at Austin Austin TX 78712 USA
| | - Noreen Klein
- Institute of Pharmacy and Biochemistry Johannes Gutenberg‐University Mainz 55128 Germany
| | - Daniel Wirth
- Institute of Pharmacy and Biochemistry Johannes Gutenberg‐University Mainz 55128 Germany
| | - Ravi Dhiman
- Department of Molecular Spectroscopy Max Planck Institute for Polymer Research Mainz 55128 Germany
| | - Dirk Schneider
- Institute of Pharmacy and Biochemistry Johannes Gutenberg‐University Mainz 55128 Germany
| | - Mischa Bonn
- Department of Molecular Spectroscopy Max Planck Institute for Polymer Research Mainz 55128 Germany
| | - Sapun H. Parekh
- Department of Molecular Spectroscopy Max Planck Institute for Polymer Research Mainz 55128 Germany
- Department of Biomedical Engineering University of Texas at Austin Austin TX 78712 USA
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Ding I, Ostrowska-Podhorodecka Z, Lee W, Liu RS, Carneiro K, Janmey PA, McCulloch CA. Cooperative roles of PAK1 and filamin A in regulation of vimentin assembly and cell extension formation. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2020; 1867:118739. [DOI: 10.1016/j.bbamcr.2020.118739] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Revised: 04/30/2020] [Accepted: 05/05/2020] [Indexed: 01/02/2023]
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Giudetti AM, Guerra F, Longo S, Beli R, Romano R, Manganelli F, Nolano M, Mangini V, Santoro L, Bucci C. An altered lipid metabolism characterizes Charcot-Marie-Tooth type 2B peripheral neuropathy. Biochim Biophys Acta Mol Cell Biol Lipids 2020; 1865:158805. [PMID: 32829064 DOI: 10.1016/j.bbalip.2020.158805] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Revised: 07/20/2020] [Accepted: 08/17/2020] [Indexed: 12/12/2022]
Abstract
Charcot-Marie Tooth type 2B (CMT2B) is a rare inherited peripheral neuropathy caused by five missense mutations in the RAB7A gene, which encodes a small GTPase of the RAB family. Currently, no cure is available for this disease. In this study, we approached the disease by comparing the lipid metabolism of CMT2B-derived fibroblasts to that of healthy controls. We found that CMT2B cells showed increased monounsaturated fatty acid level and increased expression of key enzymes of monounsaturated and polyunsaturated fatty acid synthesis. Moreover, in CMT2B cells a higher expression of acetyl-CoA carboxylase (ACC) and fatty acid synthase (FAS), key enzymes of de novo fatty acid synthesis, with a concomitantly increased [1-14C]acetate incorporation into fatty acids, was observed. The expression of diacylglycerol acyltransferase 2, a rate-limiting enzyme in triacylglycerol synthesis, as well as triacylglycerol levels were increased in CMT2B compared to control cells. In addition, as RAB7A controls lipid droplet breakdown and lipid droplet dynamics have been linked to diseases, we analyzed these organelles and showed that in CMT2B cells there is a strong accumulation of lipid droplets compared to control cells, thus reinforcing our data on abnormal lipid metabolism in CMT2B. Furthermore, we demonstrated that ACC and FAS expression levels changed upon RAB7 silencing or overexpression in HeLa cells, thus suggesting that metabolic modifications observed in CMT2B-derived fibroblasts can be, at least in part, related to RAB7 mutations.
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Affiliation(s)
- Anna Maria Giudetti
- Department of Biological and Environmental Sciences and Technologies, University of Salento, Via Monteroni n. 165, 73100 Lecce, Italy.
| | - Flora Guerra
- Department of Biological and Environmental Sciences and Technologies, University of Salento, Via Monteroni n. 165, 73100 Lecce, Italy
| | - Serena Longo
- Department of Biological and Environmental Sciences and Technologies, University of Salento, Via Monteroni n. 165, 73100 Lecce, Italy
| | - Raffaella Beli
- Department of Biological and Environmental Sciences and Technologies, University of Salento, Via Monteroni n. 165, 73100 Lecce, Italy
| | - Roberta Romano
- Department of Biological and Environmental Sciences and Technologies, University of Salento, Via Monteroni n. 165, 73100 Lecce, Italy
| | - Fiore Manganelli
- Department of Neurosciences, Reproductive Sciences and Odontostomatology, University of Naples "Federico II", Via Sergio Pansini 5, 80131, Naples, Italy
| | - Maria Nolano
- Department of Neurosciences, Reproductive Sciences and Odontostomatology, University of Naples "Federico II", Via Sergio Pansini 5, 80131, Naples, Italy; Istituti Clinici Scientifici Maugeri IRCCS, Department of Neurology of Telese Terme Institute, 82037 Telese Terme, Benevento, Italy
| | - Vincenzo Mangini
- Center for Biomolecular Nanotechnologies@UniLe, Istituto Italiano di Tecnologia, 73010 Arnesano (LE), Italy
| | - Lucio Santoro
- Department of Neurosciences, Reproductive Sciences and Odontostomatology, University of Naples "Federico II", Via Sergio Pansini 5, 80131, Naples, Italy
| | - Cecilia Bucci
- Department of Biological and Environmental Sciences and Technologies, University of Salento, Via Monteroni n. 165, 73100 Lecce, Italy.
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Liu H, Xu J, Yao Q, Zhang Z, Guo Q, Lin J. Rab7 Is Associated with Poor Prognosis of Gastric Cancer and Promotes Proliferation, Invasion, and Migration of Gastric Cancer Cells. Med Sci Monit 2020; 26:e922217. [PMID: 32591494 PMCID: PMC7339976 DOI: 10.12659/msm.922217] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND Rab7 belongs to the Ras oncogene family. Many studies have shown that its dysfunction is associated with many types of malignant tumors, but its effect on the pathogenesis of gastric cancer (GC) is still unknown. Therefore, we investigated the effect and mechanism of Rab7 in GC. MATERIAL AND METHODS The expression of Rab7 in GC and adjacent tissues was detected by immunohistochemistry, Western blot analysis, and qRT-PCR. The relationship of Rab7 with clinicopathological parameters and prognosis was analyzed. The expressions of Rab7, PI3K, and AKT in GC cells were assessed by Western blot. Overexpressed and silenced GC cell lines were constructed and AGS cells were treated with LY294002. The proliferation capacity of GC cells was detected by CCK8 assay, cell cycle changes were detected by flow cytometry, and the invasion and migration abilities of GC cells were assessed by transwell assay. RESULTS The expression of Rab7 was upregulated in the samples and cells, and was positively correlated with lymph node metastasis but negatively correlated with histological differentiation and clinical prognosis. In cell function experiments, overexpression of Rab7 induced the transition from S phase to G2 phase and promoted the proliferation, invasion, and migration of GC cells. Our assessment of the molecular mechanism showed that Rab7 promoted the phosphorylation of PI3K and AKT in GC cells. Incubation with the PI3K inhibitor Ly294002 impaired the enhanced effect of Rab7 overexpression on proliferation, migration, and invasion abilities of GC cells. These results show that the Rab7 affects GC cell progression by modulating the PI3K/AKT pathway. CONCLUSIONS Rab7 could be a prognostic biomarker and therapeutic target of the PI3K/AKT pathway in GC.
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Affiliation(s)
- Huiyong Liu
- Department of Surgical Oncology, The Second Affiliated Hospital of Fujian Medical University, Quanzhou, Fujian, China (mainland)
| | - Jie Xu
- Department of Surgical Oncology, The Second Affiliated Hospital of Fujian Medical University, Quanzhou, Fujian, China (mainland)
| | - Qingzhi Yao
- Department of Surgical Oncology, The Second Affiliated Hospital of Fujian Medical University, Quanzhou, Fujian, China (mainland)
| | - Zhongyi Zhang
- Department of Surgical Oncology, The Second Affiliated Hospital of Fujian Medical University, Quanzhou, Fujian, China (mainland)
| | - Qiaonan Guo
- Department of Surgical Oncology, The Second Affiliated Hospital of Fujian Medical University, Quanzhou, Fujian, China (mainland)
| | - Jianqing Lin
- Department of Surgical Oncology, The Second Affiliated Hospital of Fujian Medical University, Quanzhou, Fujian, China (mainland)
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19
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Romano R, Rivellini C, De Luca M, Tonlorenzi R, Beli R, Manganelli F, Nolano M, Santoro L, Eskelinen EL, Previtali SC, Bucci C. Alteration of the late endocytic pathway in Charcot-Marie-Tooth type 2B disease. Cell Mol Life Sci 2020; 78:351-372. [PMID: 32280996 PMCID: PMC7867545 DOI: 10.1007/s00018-020-03510-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2019] [Revised: 03/18/2020] [Accepted: 03/24/2020] [Indexed: 12/18/2022]
Abstract
The small GTPase RAB7A regulates late stages of the endocytic pathway and plays specific roles in neurons, controlling neurotrophins trafficking and signaling, neurite outgrowth and neuronal migration. Mutations in the RAB7A gene cause the autosomal dominant Charcot–Marie–Tooth type 2B (CMT2B) disease, an axonal peripheral neuropathy. As several neurodegenerative diseases are caused by alterations of endocytosis, we investigated whether CMT2B-causing mutations correlate with changes in this process. To this purpose, we studied the endocytic pathway in skin fibroblasts from healthy and CMT2B individuals. We found higher expression of late endocytic proteins in CMT2B cells compared to control cells, as well as higher activity of cathepsins and higher receptor degradation activity. Consistently, we observed an increased number of lysosomes, accompanied by higher lysosomal degradative activity in CMT2B cells. Furthermore, we found increased migration and increased RAC1 and MMP-2 activation in CMT2B compared to control cells. To validate these data, we obtained sensory neurons from patient and control iPS cells, to confirm increased lysosomal protein expression and lysosomal activity in CMT2B-derived neurons. Altogether, these results demonstrate that in CMT2B patient-derived cells, the endocytic degradative pathway is altered, suggesting that higher lysosomal activity contributes to neurodegeneration occurring in CMT2B.
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Affiliation(s)
- Roberta Romano
- Department of Biological and Environmental Sciences and Technologies (DiSTeBA), University of Salento, Lecce, Italy
| | - Cristina Rivellini
- Institute of Experimental Neurology (INSPE), IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Maria De Luca
- Department of Biological and Environmental Sciences and Technologies (DiSTeBA), University of Salento, Lecce, Italy
| | - Rossana Tonlorenzi
- Institute of Experimental Neurology (INSPE), IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Raffaella Beli
- Department of Biological and Environmental Sciences and Technologies (DiSTeBA), University of Salento, Lecce, Italy
| | - Fiore Manganelli
- Department of Neurosciences, Reproductive Sciences and Odontostomatology, University of Naples "Federico II", Naples, Italy
| | - Maria Nolano
- Department of Neurosciences, Reproductive Sciences and Odontostomatology, University of Naples "Federico II", Naples, Italy
- Salvatore Maugeri Foundation, Institute of Telese Terme, Benevento, Italy
| | - Lucio Santoro
- Department of Neurosciences, Reproductive Sciences and Odontostomatology, University of Naples "Federico II", Naples, Italy
| | - Eeva-Liisa Eskelinen
- Institute of Biomedicine, University of Turku, Turku, Finland
- Molecular and Integrative Biosciences Research Programme, University of Helsinki, Helsinki, Finland
| | - Stefano C Previtali
- Institute of Experimental Neurology (INSPE), IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Cecilia Bucci
- Department of Biological and Environmental Sciences and Technologies (DiSTeBA), University of Salento, Lecce, Italy.
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Abstract
The cyclin-dependent kinase 5 (CDK5), originally described as a neuronal-specific kinase, is also frequently activated in human cancers. Using conditional CDK5 knockout mice and a mouse model of highly metastatic melanoma, we found that CDK5 is dispensable for the growth of primary tumors. However, we observed that ablation of CDK5 completely abrogated the metastasis, revealing that CDK5 is essential for the metastatic spread. In mouse and human melanoma cells CDK5 promotes cell invasiveness by directly phosphorylating an intermediate filament protein, vimentin, thereby inhibiting assembly of vimentin filaments. Chemical inhibition of CDK5 blocks the metastatic spread of patient-derived melanomas in patient-derived xenograft (PDX) mouse models. Hence, inhibition of CDK5 might represent a very potent therapeutic strategy to impede the metastatic dissemination of malignant cells.
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21
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Pang K, Park J, Ahn SG, Lee J, Park Y, Ooshima A, Mizuno S, Yamashita S, Park KS, Lee SY, Jeong J, Ushijima T, Yang KM, Kim SJ. RNF208, an estrogen-inducible E3 ligase, targets soluble Vimentin to suppress metastasis in triple-negative breast cancers. Nat Commun 2019; 10:5805. [PMID: 31862882 PMCID: PMC6925134 DOI: 10.1038/s41467-019-13852-5] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Accepted: 12/03/2019] [Indexed: 12/15/2022] Open
Abstract
The development of triple-negative breast cancer (TNBC) negatively impacts both quality of life and survival in a high percentage of patients. Here, we show that RING finger protein 208 (RNF208) decreases the stability of soluble Vimentin protein through a polyubiquitin-mediated proteasomal degradation pathway, thereby suppressing metastasis of TNBC cells. RNF208 was significantly lower in TNBC than the luminal type, and low expression of RNF208 was strongly associated with poor clinical outcomes. Furthermore, RNF208 was induced by 17β-estradiol (E2) treatment in an estrogen receptor alpha (ΕRα)-dependent manner. Overexpression of RNF208 suppresses tumor formation and lung metastasis of TNBC cells. Mechanistically, RNF208 specifically polyubiquitinated the Lys97 residue within the head domain of Vimentin through interaction with the Ser39 residue of phosphorylated Vimentin, which exists as a soluble form, eventually facilitating proteasomal degradation of Vimentin. Collectively, our findings define RNF208 as a negative regulator of soluble Vimentin and a prognostic biomarker for TNBC cells. Triple-negative breast cancer (TNBC) is an aggressive subtype lacking effective targeted therapies. Here, the authors show that RNF208, an estrogen-induced ubiquitin ligase, promotes the degradation of Vimentin, thereby suppressing lung metastasis of TNBC, and may serve as a biomarker for the disease.
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Affiliation(s)
- Kyoungwha Pang
- Precision Medicine Research Center, Advanced Institute of Convergence Technology, Seoul National University, Suwon, Gyeonggi-do, 16229, Republic of Korea.,Department of Biomedical Science, College of Life Science, CHA University, Seongnam City, Gyeonggi-do, 463-400, Republic of Korea
| | - Jinah Park
- Precision Medicine Research Center, Advanced Institute of Convergence Technology, Seoul National University, Suwon, Gyeonggi-do, 16229, Republic of Korea
| | - Sung Gwe Ahn
- Department of Surgery, Gangnam Severance Hospital, Yonsei University Medical College, 712 Eonjuro, Gangnam-Gu, Seoul, 135-720, Republic of Korea
| | - Jihee Lee
- Precision Medicine Research Center, Advanced Institute of Convergence Technology, Seoul National University, Suwon, Gyeonggi-do, 16229, Republic of Korea.,Department of Biomedical Science, College of Life Science, CHA University, Seongnam City, Gyeonggi-do, 463-400, Republic of Korea
| | - Yuna Park
- Precision Medicine Research Center, Advanced Institute of Convergence Technology, Seoul National University, Suwon, Gyeonggi-do, 16229, Republic of Korea.,Department of Biomedical Science, College of Life Science, CHA University, Seongnam City, Gyeonggi-do, 463-400, Republic of Korea
| | - Akira Ooshima
- Precision Medicine Research Center, Advanced Institute of Convergence Technology, Seoul National University, Suwon, Gyeonggi-do, 16229, Republic of Korea
| | - Seiya Mizuno
- Laboratory Animal Resource Center, University of Tsukuba, Tsukuba, Ibaraki, 305-8575, Japan
| | - Satoshi Yamashita
- Division of Epigenomics, National Cancer Center Research Institute, Tokyo, Japan
| | - Kyung-Soon Park
- Department of Biomedical Science, College of Life Science, CHA University, Seongnam City, Gyeonggi-do, 463-400, Republic of Korea
| | - So-Young Lee
- Department of Internal Medicine, CHA University, Seongnam City, Gyeonggi-do, 463-400, Republic of Korea
| | - Joon Jeong
- Department of Surgery, Gangnam Severance Hospital, Yonsei University Medical College, 712 Eonjuro, Gangnam-Gu, Seoul, 135-720, Republic of Korea
| | - Toshikazu Ushijima
- Division of Epigenomics, National Cancer Center Research Institute, Tokyo, Japan
| | - Kyung-Min Yang
- Precision Medicine Research Center, Advanced Institute of Convergence Technology, Seoul National University, Suwon, Gyeonggi-do, 16229, Republic of Korea.
| | - Seong-Jin Kim
- Precision Medicine Research Center, Advanced Institute of Convergence Technology, Seoul National University, Suwon, Gyeonggi-do, 16229, Republic of Korea. .,Department of Transdisciplinary Studies, Graduate School of Convergence Science and Technology, Seoul National University, Suwon, Gyeonggi-do, 16229, Republic of Korea. .,TheragenEtex Bio Institute, TheragenEtex Co, Suwon, Gyeonggi-do, 16229, Republic of Korea.
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22
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Guerra F, Bucci C. Role of the RAB7 Protein in Tumor Progression and Cisplatin Chemoresistance. Cancers (Basel) 2019; 11:cancers11081096. [PMID: 31374919 PMCID: PMC6721790 DOI: 10.3390/cancers11081096] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2019] [Revised: 07/23/2019] [Accepted: 07/30/2019] [Indexed: 12/19/2022] Open
Abstract
RAB7 is a small guanosine triphosphatase (GTPase) extensively studied as regulator of vesicular trafficking. Indeed, its role is fundamental in several steps of the late endocytic pathway, including endosome maturation, transport from early endosomes to late endosomes and lysosomes, clustering and fusion of late endosomes and lysosomes in the perinuclear region and lysosomal biogenesis. Besides endocytosis, RAB7 is important for a number of other cellular processes among which, autophagy, apoptosis, signaling, and cell migration. Given the importance of RAB7 in these cellular processes, the interest to study the role of RAB7 in cancer progression is widely grown. Here, we describe the current understanding of oncogenic and oncosuppressor functions of RAB7 analyzing cellular context and other environmental factors in which it elicits pro and/or antitumorigenic effects. We also discuss the role of RAB7 in cisplatin resistance associated with its ability to regulate the late endosomal pathway, lysosomal biogenesis and extracellular vesicle secretion. Finally, we examined the potential cancer therapeutic strategies targeting the different molecular events in which RAB7 is involved.
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Affiliation(s)
- Flora Guerra
- Department of Biological and Environmental Sciences and Technologies (DiSTeBA), University of Salento, Via Provinciale Lecce-Monteroni 165, 73100 Lecce, Italy.
| | - Cecilia Bucci
- Department of Biological and Environmental Sciences and Technologies (DiSTeBA), University of Salento, Via Provinciale Lecce-Monteroni 165, 73100 Lecce, Italy.
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23
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Lehmann SM, Leube RE, Schwarz N. Keratin 6a mutations lead to impaired mitochondrial quality control. Br J Dermatol 2019; 182:636-647. [PMID: 31004504 DOI: 10.1111/bjd.18014] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/15/2019] [Indexed: 01/05/2023]
Abstract
BACKGROUND Epidermal differentiation is a multilevel process in which keratinocytes need to lose their organelles, including their mitochondria, by autophagy. Disturbed autophagy leads to thickening of the epidermis as seen in pachyonychia congenita (PC), a rare skin disease caused by mutations in keratins 6, 16 and 17. OBJECTIVES To ask if mitophagy, the selective degradation of mitochondria by autophagy, is disturbed in PC and, if so, at which stage. METHODS Immortalized keratinocytes derived from patients with PC were used in fluorescence-based and biochemical assays to dissect the different steps of mitophagy. RESULTS PC keratinocytes accumulated old mitochondria and displayed disturbed clearance of mitochondria after mitochondrial uncoupling. However, early mitophagy steps and autophagosome formation were not affected. We observed that autolysosomes accumulate in PC and are not sufficiently recycled. CONCLUSIONS We propose an influence of keratins on autolysosomal degradation and recycling. What's already known about this topic? Terminal epidermal differentiation is a multistep process that includes the elimination of cellular components by autophagy. Autophagy-impaired keratinocytes have been shown to result in thickening of epidermal layers. Hyperkeratosis also occurs in pachyonychia congenita (PC), a rare skin disease caused by mutations in keratins 6, 16 and 17. What does this study add? Keratins contribute to mitochondrial quality control as well as maintenance of mitochondria-endoplasmic reticulum contact sites. Keratins influence autolysosomal maturation or reformation. What is the translational message? Overaged mitochondria and autolysosomes accumulate in PC. Mutations in keratin 6a lead to severely impaired mitophagy, which might contribute to PC pathogenesis.
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Affiliation(s)
- S M Lehmann
- Institute of Molecular and Cellular Anatomy, RWTH Aachen University, Aachen, Germany
| | - R E Leube
- Institute of Molecular and Cellular Anatomy, RWTH Aachen University, Aachen, Germany
| | - N Schwarz
- Institute of Molecular and Cellular Anatomy, RWTH Aachen University, Aachen, Germany
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24
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Sousa C, Gouveia LF, Kreutzer B, Silva-Lima B, Maphasa RE, Dube A, Videira M. Polymeric Micellar Formulation Enhances Antimicrobial and Anticancer Properties of Salinomycin. Pharm Res 2019; 36:83. [PMID: 30989413 DOI: 10.1007/s11095-019-2615-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Accepted: 03/24/2019] [Indexed: 12/17/2022]
Abstract
PURPOSE Salinomycin (SAL) is a polyether compound that exhibits strong antimicrobial as well as anticancer activity. Nanomedicine has been at the forefront of drug delivery research with the aim of increasing the efficacy, specificity and reduce toxicity of drugs. There is an intersection between infection and cancer, and cancer patients are prone to bacterial infections. In this study, polymeric micelles were prepared using Pluronic® F127 (PM) to encapsulate SAL (PM_SAL) with the view of enhancing antimicrobial and anticancer activity. METHODS A Quality by Design (QbD) approach was utilized to synthesize PM_SAL, and nanoformulation activity was determined against bacterial (S. aureus, MRSA and E. coli). Effects on cancer cell line A549, i.e. cell viability, prevention of P-gp efflux, vimentin expression, effects on migratory ability of A549 cells. Anticancer activity was determined by ability to eradicate cancer stem-like cells. RESULTS PM_SAL demonstrated only efficacy against MRSA, being even higher than that obtained with SAL. In A549 cells, a 15-fold increase in P-gp's expression as well as a significant decrease of the cell's migration, was observed. CONCLUSIONS PM_SAL can interfere with the oncogenic protein VIM, involved in the crucial mechanisms EMT, downregulating its expression. Altogether data obtained indicates that this antibiotic and the developed polymeric micelle system is a very promising inhibitor of tumor cell growth.
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Affiliation(s)
- Carolina Sousa
- Pharmacological and Regulatory Sciences Group (PharmaRegSci), Research Institute for Medicines (iMed.ULisboa), Faculdadde de Farmácia da Universidade de Lisboa, Lisbon, Portugal
| | - Luís F Gouveia
- Pharmacological and Regulatory Sciences Group (PharmaRegSci), Research Institute for Medicines (iMed.ULisboa), Faculdadde de Farmácia da Universidade de Lisboa, Lisbon, Portugal
| | - Bruna Kreutzer
- Pharmacological and Regulatory Sciences Group (PharmaRegSci), Research Institute for Medicines (iMed.ULisboa), Faculdadde de Farmácia da Universidade de Lisboa, Lisbon, Portugal
| | - Beatriz Silva-Lima
- Pharmacological and Regulatory Sciences Group (PharmaRegSci), Research Institute for Medicines (iMed.ULisboa), Faculdadde de Farmácia da Universidade de Lisboa, Lisbon, Portugal
| | - Retsepile E Maphasa
- Discipline of Pharmaceutics, School of Pharmacy, University of the Western Cape, Bellville, South Africa
| | - Admire Dube
- Discipline of Pharmaceutics, School of Pharmacy, University of the Western Cape, Bellville, South Africa
| | - Mafalda Videira
- Pharmacological and Regulatory Sciences Group (PharmaRegSci), Research Institute for Medicines (iMed.ULisboa), Faculdadde de Farmácia da Universidade de Lisboa, Lisbon, Portugal.
- iMed.ULisboa - Research Institute for Medicines and Pharmaceutical Sciences, Faculty of Pharmacy, University of Lisbon, Av. Professor Gama Pinto, 1649-003, Lisbon, Portugal.
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25
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Knockdown of Rab7a suppresses the proliferation, migration, and xenograft tumor growth of breast cancer cells. Biosci Rep 2019; 39:BSR20180480. [PMID: 29769411 PMCID: PMC6361774 DOI: 10.1042/bsr20180480] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Revised: 03/28/2018] [Accepted: 05/11/2018] [Indexed: 01/06/2023] Open
Abstract
Breast cancer is a common invasive cancer in women. Ras-related protein Rab-7a (Rab7a) is involved in late endocytic trafficking, while its role in breast cancer is largely unclear. In the present study, we investigated the role of Rab7a in breast cancer. Comparing with adjacent breast tissues, Rab7a expression was increased in breast cancer tissues. Using lentivirus-mediated knockdown strategy, we found that Rab7a silencing inhibited the proliferation and colony formation of MDA-MB-231 cells. Apoptosis and G2 cell cycle arrest were induced in Rab7a knockdown. By contrast, Rab7a suppressed the apoptosis and promoted proliferation and colony formation of MCF-7 cells. The migration of MDA-MB-231 cells was suppressed by Rab7a knockdown. In vivo, depletion of Rab7a inhibited the xenograft tumor development of MDA-MB-231 cells. Altogether, our results highlight the novel function of Rab7a in the proliferation, invasion, and xenograft tumor development of breast cancer cells.
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26
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Biskou O, Casanova V, Hooper KM, Kemp S, Wright GP, Satsangi J, Barlow PG, Stevens C. The type III intermediate filament vimentin regulates organelle distribution and modulates autophagy. PLoS One 2019; 14:e0209665. [PMID: 30699149 PMCID: PMC6353089 DOI: 10.1371/journal.pone.0209665] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Accepted: 12/10/2018] [Indexed: 12/21/2022] Open
Abstract
The cytoskeletal protein vimentin plays a key role in positioning of organelles within the cytosol and has been linked to the regulation of numerous cellular processes including autophagy, however, how vimentin regulates autophagy remains relatively unexplored. Here we report that inhibition of vimentin using the steroidal lactone Withaferin A (WFA) causes vimentin to aggregate, and this is associated with the relocalisation of organelles including autophagosomes and lysosomes from the cytosol to a juxtanuclear location. Vimentin inhibition causes autophagosomes to accumulate, and we demonstrate this results from modulation of mechanistic target of rapamycin (mTORC1) activity, and disruption of autophagosome-lysosome fusion. We suggest that vimentin plays a physiological role in autophagosome and lysosome positioning, thus identifying vimentin as a key factor in the regulation of mTORC1 and autophagy.
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Affiliation(s)
- Olga Biskou
- School of Applied Sciences, Edinburgh Napier University, Sighthill Campus, Sighthill Court, Edinburgh, United Kingdom
| | - Victor Casanova
- School of Applied Sciences, Edinburgh Napier University, Sighthill Campus, Sighthill Court, Edinburgh, United Kingdom
| | - Kirsty M. Hooper
- School of Applied Sciences, Edinburgh Napier University, Sighthill Campus, Sighthill Court, Edinburgh, United Kingdom
| | - Sadie Kemp
- School of Applied Sciences, Edinburgh Napier University, Sighthill Campus, Sighthill Court, Edinburgh, United Kingdom
| | - Graham P. Wright
- School of Applied Sciences, Edinburgh Napier University, Sighthill Campus, Sighthill Court, Edinburgh, United Kingdom
| | - Jack Satsangi
- Centre for Genomic & Experimental Medicine, University of Edinburgh, Western General Hospital Campus, Crewe Road, Edinburgh, United Kingdom
- Translational Gastroenterology Unit, Nuffield Department of Medicine, John Radcliffe Hospital, Oxford, United Kingdom
| | - Peter G. Barlow
- School of Applied Sciences, Edinburgh Napier University, Sighthill Campus, Sighthill Court, Edinburgh, United Kingdom
| | - Craig Stevens
- School of Applied Sciences, Edinburgh Napier University, Sighthill Campus, Sighthill Court, Edinburgh, United Kingdom
- * E-mail:
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27
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Håversen L, Sundelin JP, Mardinoglu A, Rutberg M, Ståhlman M, Wilhelmsson U, Hultén LM, Pekny M, Fogelstrand P, Bentzon JF, Levin M, Borén J. Vimentin deficiency in macrophages induces increased oxidative stress and vascular inflammation but attenuates atherosclerosis in mice. Sci Rep 2018; 8:16973. [PMID: 30451917 PMCID: PMC6242955 DOI: 10.1038/s41598-018-34659-2] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Accepted: 09/27/2018] [Indexed: 12/14/2022] Open
Abstract
The aim was to clarify the role of vimentin, an intermediate filament protein abundantly expressed in activated macrophages and foam cells, in macrophages during atherogenesis. Global gene expression, lipid uptake, ROS, and inflammation were analyzed in bone-marrow derived macrophages from vimentin-deficient (Vim-/-) and wild-type (Vim+/+) mice. Atherosclerosis was induced in Ldlr-/- mice transplanted with Vim-/- and Vim+/+ bone marrow, and in Vim-/- and Vim+/+ mice injected with a PCSK9 gain-of-function virus. The mice were fed an atherogenic diet for 12-15 weeks. We observed impaired uptake of native LDL but increased uptake of oxLDL in Vim-/- macrophages. FACS analysis revealed increased surface expression of the scavenger receptor CD36 on Vim-/- macrophages. Vim-/- macrophages also displayed increased markers of oxidative stress, activity of the transcription factor NF-κB, secretion of proinflammatory cytokines and GLUT1-mediated glucose uptake. Vim-/- mice displayed decreased atherogenesis despite increased vascular inflammation and increased CD36 expression on macrophages in two mouse models of atherosclerosis. We demonstrate that vimentin has a strong suppressive effect on oxidative stress and that Vim-/- mice display increased vascular inflammation with increased CD36 expression on macrophages despite decreased subendothelial lipid accumulation. Thus, vimentin has a key role in regulating inflammation in macrophages during atherogenesis.
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Affiliation(s)
- Liliana Håversen
- Department of Molecular and Clinical Medicine/Wallenberg Laboratory, University of Gothenburg, and Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Jeanna Perman Sundelin
- Strategic planning and operations, Cardiovascular and metabolic diseases, IMED Biotech Unit, AstraZeneca, Gothenburg, Sweden
| | - Adil Mardinoglu
- Science for Life Laboratory, KTH - Royal Institute of Technology, Stockholm, Sweden
- Centre for Host-Microbiome Interactions, Dental Institute, King's College London, London, SE1 9RT, United Kingdom
| | - Mikael Rutberg
- Department of Molecular and Clinical Medicine/Wallenberg Laboratory, University of Gothenburg, and Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Marcus Ståhlman
- Department of Molecular and Clinical Medicine/Wallenberg Laboratory, University of Gothenburg, and Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Ulrika Wilhelmsson
- Department of Clinical Neuroscience/Center for Brain Repair, University of Gothenburg, Gothenburg, Sweden
| | - Lillemor Mattsson Hultén
- Department of Molecular and Clinical Medicine/Wallenberg Laboratory, University of Gothenburg, and Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Milos Pekny
- Department of Clinical Neuroscience/Center for Brain Repair, University of Gothenburg, Gothenburg, Sweden
| | - Per Fogelstrand
- Department of Molecular and Clinical Medicine/Wallenberg Laboratory, University of Gothenburg, and Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Jacob Fog Bentzon
- Department of Clinical Medicine, Aarhus University, Aarhus, Denmark, and Centro Nacional de Investigaciones Cardiovasculares Carlos III (CNIC), Madrid, Spain
| | - Malin Levin
- Department of Molecular and Clinical Medicine/Wallenberg Laboratory, University of Gothenburg, and Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Jan Borén
- Department of Molecular and Clinical Medicine/Wallenberg Laboratory, University of Gothenburg, and Sahlgrenska University Hospital, Gothenburg, Sweden.
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28
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Zhang X, Wang X, Liu T, Mo M, Ao L, Liu J, Cao J, Cui Z. ZnSO 4 rescued vimentin from collapse in DBP-exposed Sertoli cells by attenuating ER stress and apoptosis. Toxicol In Vitro 2018; 48:195-204. [PMID: 29408667 DOI: 10.1016/j.tiv.2018.01.020] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2017] [Revised: 10/27/2017] [Accepted: 01/22/2018] [Indexed: 12/20/2022]
Abstract
Sertoli cells (SCs) provide physical and nutritional support for spermatogenesis. Dibutyl phthalate (DBP) is a plasticizer that has male reproductive toxicity. The collapse of vimentin in DBP-exposed SCs is thought to induce the sloughing of spermatocytes from seminiferous tubules. In this study, we explored methods to rescue vimentin from collapse in DBP-exposed SCs. DBP not only induced the hyperphosphorylation of vimentin but also triggered endoplasmic reticulum (ER) stress and apoptosis in SCs. Treatment with BAPTA-AM, an antagonist of Ca2+, significantly decreased the level of phosphorylated vimentin, while LY294002, an inhibitor of Akt1, did not. ER stress and apoptosis remained at high levels, and the distribution of vimentin was not improved. ZnSO4 treatment did not decrease the level of phosphorylated vimentin. However, after treatment, ER stress and apoptosis were obviously inhibited, and the distribution of vimentin was reconverted. These results indicated that ZnSO4 could alleviate the collapse of vimentin by attenuating ER stress and apoptosis. This study suggested that an appropriate zinc supply might be a choice to alleviate DBP-induced adverse reproductive effects.
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Affiliation(s)
- Xi Zhang
- Institute of Toxicology, College of Preventive Medicine, Third Military Medical University, No. 30, Gaotanyan Road, Shapingba District, Chongqing 400038, People's Republic of China
| | - Xiaogang Wang
- Institute of Toxicology, College of Preventive Medicine, Third Military Medical University, No. 30, Gaotanyan Road, Shapingba District, Chongqing 400038, People's Republic of China
| | - Taixiu Liu
- Institute of Toxicology, College of Preventive Medicine, Third Military Medical University, No. 30, Gaotanyan Road, Shapingba District, Chongqing 400038, People's Republic of China
| | - Min Mo
- Institute of Toxicology, College of Preventive Medicine, Third Military Medical University, No. 30, Gaotanyan Road, Shapingba District, Chongqing 400038, People's Republic of China
| | - Lin Ao
- Institute of Toxicology, College of Preventive Medicine, Third Military Medical University, No. 30, Gaotanyan Road, Shapingba District, Chongqing 400038, People's Republic of China
| | - Jinyi Liu
- Institute of Toxicology, College of Preventive Medicine, Third Military Medical University, No. 30, Gaotanyan Road, Shapingba District, Chongqing 400038, People's Republic of China
| | - Jia Cao
- Institute of Toxicology, College of Preventive Medicine, Third Military Medical University, No. 30, Gaotanyan Road, Shapingba District, Chongqing 400038, People's Republic of China
| | - Zhihong Cui
- Institute of Toxicology, College of Preventive Medicine, Third Military Medical University, No. 30, Gaotanyan Road, Shapingba District, Chongqing 400038, People's Republic of China.
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29
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Abstract
Intermediate filaments (IFs) are one of the three major elements of the cytoskeleton. Their stability, intrinsic mechanical properties, and cell type-specific expression patterns distinguish them from actin and microtubules. By providing mechanical support, IFs protect cells from external forces and participate in cell adhesion and tissue integrity. IFs form an extensive and elaborate network that connects the cell cortex to intracellular organelles. They act as a molecular scaffold that controls intracellular organization. However, IFs have been revealed as much more than just rigid structures. Their dynamics is regulated by multiple signaling cascades and appears to contribute to signaling events in response to cell stress and to dynamic cellular functions such as mitosis, apoptosis, and migration.
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Affiliation(s)
- Sandrine Etienne-Manneville
- Institut Pasteur Paris, CNRS UMR 3691, Cell Polarity, Migration and Cancer Unit, Equipe Labellisée Ligue Contre le Cancer, Paris Cedex 15, France;
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30
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Kjos I, Vestre K, Guadagno NA, Borg Distefano M, Progida C. Rab and Arf proteins at the crossroad between membrane transport and cytoskeleton dynamics. BIOCHIMICA ET BIOPHYSICA ACTA. MOLECULAR CELL RESEARCH 2018; 1865:1397-1409. [PMID: 30021127 DOI: 10.1016/j.bbamcr.2018.07.009] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Revised: 07/05/2018] [Accepted: 07/13/2018] [Indexed: 01/04/2023]
Abstract
The intracellular movement and positioning of organelles and vesicles is mediated by the cytoskeleton and molecular motors. Small GTPases like Rab and Arf proteins are main regulators of intracellular transport by connecting membranes to cytoskeleton motors or adaptors. However, it is becoming clear that interactions between these small GTPases and the cytoskeleton are important not only for the regulation of membrane transport. In this review, we will cover our current understanding of the mechanisms underlying the connection between Rab and Arf GTPases and the cytoskeleton, with special emphasis on the double role of these interactions, not only in membrane trafficking but also in membrane and cytoskeleton remodeling. Furthermore, we will highlight the most recent findings about the fine control mechanisms of crosstalk between different members of Rab, Arf, and Rho families of small GTPases in the regulation of cytoskeleton organization.
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Affiliation(s)
- Ingrid Kjos
- Department of Biosciences, University of Oslo, Norway
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31
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Colecchia D, Stasi M, Leonardi M, Manganelli F, Nolano M, Veneziani BM, Santoro L, Eskelinen EL, Chiariello M, Bucci C. Alterations of autophagy in the peripheral neuropathy Charcot-Marie-Tooth type 2B. Autophagy 2018; 14:930-941. [PMID: 29130394 PMCID: PMC6103410 DOI: 10.1080/15548627.2017.1388475] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Charcot-Marie-Tooth type 2B (CMT2B) disease is a dominant axonal peripheral neuropathy caused by 5 mutations in the RAB7A gene, a ubiquitously expressed GTPase controlling late endocytic trafficking. In neurons, RAB7A also controls neuronal-specific processes such as NTF (neurotrophin) trafficking and signaling, neurite outgrowth and neuronal migration. Given the involvement of macroautophagy/autophagy in several neurodegenerative diseases and considering that RAB7A is fundamental for autophagosome maturation, we investigated whether CMT2B-causing mutants affect the ability of this gene to regulate autophagy. In HeLa cells, we observed a reduced localization of all CMT2B-causing RAB7A mutants on autophagic compartments. Furthermore, compared to expression of RAB7AWT, expression of these mutants caused a reduced autophagic flux, similar to what happens in cells expressing the dominant negative RAB7AT22N mutant. Consistently, both basal and starvation-induced autophagy were strongly inhibited in skin fibroblasts from a CMT2B patient carrying the RAB7AV162M mutation, suggesting that alteration of the autophagic flux could be responsible for neurodegeneration.
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Affiliation(s)
- David Colecchia
- a Consiglio Nazionale delle Ricerche, Istituto di Fisiologia Clinica and Istituto Toscano Tumori-Core Research Laboratory , Signal Transduction Unit , AOU Senese , Siena , Italy
| | - Mariangela Stasi
- b Department of Biological and Environmental Sciences and Technologies (DiSTeBA) , University of Salento , Lecce , Italy
| | - Margherita Leonardi
- a Consiglio Nazionale delle Ricerche, Istituto di Fisiologia Clinica and Istituto Toscano Tumori-Core Research Laboratory , Signal Transduction Unit , AOU Senese , Siena , Italy
| | - Fiore Manganelli
- c Department of Neurosciences , University of Naples "Federico II" , Naples , Italy
| | - Maria Nolano
- d Salvatore Maugeri Foundation , Institute of Telese Terme , Benevento , Italy
| | - Bianca Maria Veneziani
- e Department of Molecular Medicine and Medical Biotechnologies , University of Naples "Federico II" , Naples , Italy
| | - Lucio Santoro
- c Department of Neurosciences , University of Naples "Federico II" , Naples , Italy
| | - Eeva-Liisa Eskelinen
- f Department of Biosciences, Division of Biochemistry and Biotechnology , University of Helsinki , Helsinki , Finland
| | - Mario Chiariello
- a Consiglio Nazionale delle Ricerche, Istituto di Fisiologia Clinica and Istituto Toscano Tumori-Core Research Laboratory , Signal Transduction Unit , AOU Senese , Siena , Italy
| | - Cecilia Bucci
- b Department of Biological and Environmental Sciences and Technologies (DiSTeBA) , University of Salento , Lecce , Italy
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Podinovskaia M, Spang A. The Endosomal Network: Mediators and Regulators of Endosome Maturation. ENDOCYTOSIS AND SIGNALING 2018; 57:1-38. [DOI: 10.1007/978-3-319-96704-2_1] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Xu M, Wang C, Zhu M, Wang X, Zhang L, Zhao J. 2,3,5,4‑tetrahydroxy diphenylethylene‑2‑O‑glucoside inhibits the adhesion and invasion of A549 human lung cancer cells. Mol Med Rep 2017; 16:8900-8906. [PMID: 28990072 PMCID: PMC5779970 DOI: 10.3892/mmr.2017.7680] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2015] [Accepted: 08/23/2016] [Indexed: 01/18/2023] Open
Abstract
Lung cancer is considered to be a serious disease that poses a significant threat to human health. 2,3,5,4‑tetrahydroxy diphenylethylene‑2‑O‑glucoside (THSG) is a bioactive compound derived from Polygonum multiflorum Thunb. That has been demonstrated to possess antioxidative, anti‑inflammatory and antitumor activities. However, little is currently known regarding the potential anticancer effects of this compound in lung cancer. Therefore, the present study aimed to investigate the effects of THSG on the adhesion and invasion of A549 human lung cancer cells in vitro, and to identify the putative mechanisms involved. Cell Counting kit‑8 assay was performed to determine A549 cell viability following treatment with various doses (0, 5, 10, 25, 50, 100, 150 and 200 µM) of THSG for 12, 24 and 48 h. In addition, cell adhesion and invasion were determined following treatment of A549 cells with 0, 10, 25 or 50 µM THSG for 1, 2 or 3 h, respectively. Reverse transcription‑quantitative polymerase chain reaction analysis was performed to examine the mRNA expression levels of Snail, E‑cadherin, vimentin, matrix metalloproteinase (MMP) 2 and MMP9 following THSG treatment for 12 h. Western blot analysis was conducted to detect the protein expression levels of Snail, E‑cadherin, vimentin, MMP2 and MMP9 following THSG treatment for 24 h. Treatment with THSG (10, 25 and 50 µM) significantly suppressed the adhesion and invasion of A549 human lung cancer cells in a dose‑dependent manner. In addition, the mRNA and protein expression levels of adhesion and invasion‑associated factors were decreased significantly in A549 cells treated with THSG. In conclusion, THSG effectively suppressed the adhesion and invasion of human lung cancer cells potentially by inhibiting the expression of adhesion and invasion‑related genes.
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Affiliation(s)
- Ming Xu
- Department of Thoracic and Cardiovascular Surgery, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, P.R. China
| | - Cong Wang
- Department of Hematology, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, P.R. China
| | - Minglin Zhu
- Department of Thoracic and Cardiovascular Surgery, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, P.R. China
| | - Xianguo Wang
- Department of Thoracic and Cardiovascular Surgery, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, P.R. China
| | - Li Zhang
- Department of Thoracic and Cardiovascular Surgery, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, P.R. China
| | - Jinping Zhao
- Department of Thoracic and Cardiovascular Surgery, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, P.R. China
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He C, Kong L, Zhou L, Xia J, Wei H, Liu M, Peng H. Host Cell Vimentin Restrains Toxoplasma gondii Invasion and Phosphorylation of Vimentin is Partially Regulated by Interaction with TgROP18. Int J Biol Sci 2017; 13:1126-1137. [PMID: 29104504 PMCID: PMC5666328 DOI: 10.7150/ijbs.21247] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2017] [Accepted: 06/23/2017] [Indexed: 12/14/2022] Open
Abstract
The obligate intracellular parasite, Toxoplasma gondii, manipulates the cytoskeleton of its host cells to facilitate infection. A significant rearrangement of host cell vimentin around Toxoplasma parasitophorous vacuoles is observed during the course of infection. ROP18 (TgROP18) is a serine-threonine kinase secreted by T. gondii rhoptry and a major virulence factor; however, the mechanisms by which this kinase modulates host factors remain poorly understood. Different and dynamic patterns of vimentin solubility, phosphorylation, and expression levels were observed in host cells infected with T. gondii strain RH and RH Δrop18 strains, suggesting that TgROP18 contributes to the regulation of these dynamic patterns. Additionally, host cell vimentin was demonstrated to interact with and be phosphorylated by TgROP18. A significant increase in T. gondii infection rate was observed in vimentin knockout human brain microvessel endothelial cells (HBMEC), while vimentin knockout or knock down in host cells had no impact on parasite proliferation and egress. These results indicate that host cell vimentin can inhibit T. gondii invasion. Interestingly, western blotting of different mouse tissues indicated that the lowest vimentin expression level was present in the brain, which may explain the mechanism underlying the nervous system tropism of T. gondii, and the phenomenon of huge cyst burdens developing in the mouse brain during chronic infection.
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Affiliation(s)
- Cheng He
- Department of Pathogen Biology, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, Guangdong Province, 510515, China
| | - Ling Kong
- Department of Pathogen Biology, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, Guangdong Province, 510515, China
| | - Lijuan Zhou
- Department of Pathogen Biology, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, Guangdong Province, 510515, China
| | - Jing Xia
- Department of Pathogen Biology, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, Guangdong Province, 510515, China
| | - Haixia Wei
- Department of Pathogen Biology, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, Guangdong Province, 510515, China
| | - Min Liu
- Department of Pathogen Biology, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, Guangdong Province, 510515, China
| | - Hongjuan Peng
- Department of Pathogen Biology, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, Guangdong Province, 510515, China
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Peter F, Rost S, Rolfs A, Frech MJ. Activation of PKC triggers rescue of NPC1 patient specific iPSC derived glial cells from gliosis. Orphanet J Rare Dis 2017; 12:145. [PMID: 28841900 PMCID: PMC5574080 DOI: 10.1186/s13023-017-0697-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2017] [Accepted: 08/20/2017] [Indexed: 01/07/2023] Open
Abstract
BACKGROUND Niemann-Pick disease Type C1 (NPC1) is a rare progressive neurodegenerative disorder caused by mutations in the NPC1 gene. The pathological mechanisms, underlying NPC1 are not yet completely understood. Especially the contribution of glial cells and gliosis to the progression of NPC1, are controversially discussed. As an analysis of affected cells is unfeasible in NPC1-patients, we recently developed an in vitro model system, based on cells derived from NPC1-patient specific iPSCs. Here, we asked if this model system recapitulates gliosis, observed in non-human model systems and NPC1 patient post mortem biopsies. We determined the amount of reactive astrocytes and the regulation of the intermediate filaments GFAP and vimentin, all indicating gliosis. Furthermore, we were interested in the assembly and phosphorylation of these intermediate filaments and finally the impact of the activation of protein kinase C (PKC), which is described to ameliorate the pathogenic phenotype of NPC1-deficient fibroblasts, including hypo-phosphorylation of vimentin and cholesterol accumulation. METHODS We analysed glial cells derived from NPC1 patient specific induced pluripotent stem cells, carrying different NPC1 mutations. The amount of reactive astrocytes was determined by means of immuncytochemical stainings and FACS-analysis. Semi-quantitative western blot was used to determine the amount of phosphorylated GFAP and vimentin. Cholesterol accumulation was analysed by Filipin staining and quantified by Amplex Red Assay. U18666A was used to induce NPC1 phenotype in unaffected cells of the control cell line. Phorbol 12-myristate 13-acetate (PMA) was used to activate PKC. RESULTS Immunocytochemical detection of GFAP, vimentin and Ki67 revealed that NPC1 mutant glial cells undergo gliosis. We found hypo-phosphorylation of the intermediate filaments GFAP and vimentin and alterations in the assembly of these intermediate filaments in NPC1 mutant cells. The application of U18666A induced not only NPC1 phenotypical accumulation of cholesterol, but characteristics of gliosis in glial cells derived from unaffected control cells. The application of phorbol 12-myristate 13-acetate, an activator of protein kinase C resulted in a significantly reduced number of reactive astrocytes and further characteristics of gliosis in NPC1-deficient cells. Furthermore, it triggered a restoration of cholesterol amounts to level of control cells. CONCLUSION Our data demonstrate that glial cells derived from NPC1-patient specific iPSCs undergo gliosis. The application of U18666A induced comparable characteristics in un-affected control cells, suggesting that gliosis is triggered by hampered function of NPC1 protein. The activation of protein kinase C induced an amelioration of gliosis, as well as a reduction of cholesterol amount. These results provide further support for the line of evidence that gliosis might not be only a secondary reaction to the loss of neurons, but might be a direct consequence of a reduced PKC activity due to the phenotypical cholesterol accumulation observed in NPC1. In addition, our data support the involvement of PKCs in NPC1 disease pathogenesis and suggest that PKCs may be targeted in future efforts to develop therapeutics for NPC1 disease.
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Affiliation(s)
- Franziska Peter
- Albrecht-Kossel-Institute for Neuroregeneration (AKos), University Medicine Rostock, Gehlsheimer Straße 20, 18147 Rostock, Germany
| | - Sebastian Rost
- Albrecht-Kossel-Institute for Neuroregeneration (AKos), University Medicine Rostock, Gehlsheimer Straße 20, 18147 Rostock, Germany
| | - Arndt Rolfs
- Albrecht-Kossel-Institute for Neuroregeneration (AKos), University Medicine Rostock, Gehlsheimer Straße 20, 18147 Rostock, Germany
| | - Moritz J. Frech
- Albrecht-Kossel-Institute for Neuroregeneration (AKos), University Medicine Rostock, Gehlsheimer Straße 20, 18147 Rostock, Germany
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Bargagna-Mohan P, Ishii A, Lei L, Sheehy D, Pandit S, Chan G, Bansal R, Mohan R. Sustained activation of ERK1/2 MAPK in Schwann cells causes corneal neurofibroma. J Neurosci Res 2017; 95:1712-1729. [PMID: 28489286 DOI: 10.1002/jnr.24067] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2016] [Revised: 03/09/2017] [Accepted: 03/30/2017] [Indexed: 12/27/2022]
Abstract
Recent studies have shown that constitutive activation of extracellular signal-regulated kinases 1 and 2 (ERK1/2) in Schwann cells (SCs) increases myelin thickness in transgenic mice. In this secondary analysis, we report that these transgenic mice develop a postnatal corneal neurofibroma with the loss of corneal transparency by age six months. We show that expansion of non-myelinating SCs, under the control of activated ERK1/2, also drive myofibroblast differentiation that derives from both SC precursors and resident corneal keratocytes. Further, these mice also harbor activated mast cells in the central cornea, which contributes to pathological corneal neovascularization and fibrosis. This breach of corneal avascularity and immune status is associated with the growth of the tumor pannus, resulting in a corneal stroma that is nearly four times its normal size. In corneas with advanced disease, some axons became ectopically myelinated, and the disruption of Remak bundles is evident. To determine whether myofibroblast differentiation was linked to vimentin, we examined the levels and phosphorylation status of this fibrotic biomarker. Concomitant with the early upregulation of vimentin, a serine 38-phosphorylated isoform of vimentin (pSer38vim) increased in SCs, which was attributed primarily to the soluble fraction of protein-not the cytoskeletal portion. However, the overexpressed pSer38vim became predominantly cytoskeletal with the growth of the corneal tumor. Our findings demonstrate an unrecognized function of ERK1/2 in the maintenance of corneal homeostasis, wherein its over-activation in SCs promotes corneal neurofibromas. This study is also the first report of a genetically engineered mouse that spontaneously develops a corneal tumor.
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Affiliation(s)
| | - Akihiro Ishii
- Department of Neuroscience, University of Connecticut Health Center
| | - Ling Lei
- Department of Neuroscience, University of Connecticut Health Center
| | - Daniel Sheehy
- Department of Neuroscience, University of Connecticut Health Center
| | - Saagar Pandit
- Department of Neuroscience, University of Connecticut Health Center
| | - Grace Chan
- Department of Psychiatry, University of Connecticut Health Center
| | - Rashmi Bansal
- Department of Neuroscience, University of Connecticut Health Center
| | - Royce Mohan
- Department of Neuroscience, University of Connecticut Health Center
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Charcot Marie Tooth 2B Peripheral Sensory Neuropathy: How Rab7 Mutations Impact NGF Signaling? Int J Mol Sci 2017; 18:ijms18020324. [PMID: 28165391 PMCID: PMC5343860 DOI: 10.3390/ijms18020324] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2016] [Revised: 01/10/2017] [Accepted: 01/15/2017] [Indexed: 12/12/2022] Open
Abstract
Charcot-Marie-Tooth 2B peripheral sensory neuropathy (CMT2B) is a debilitating autosomal dominant hereditary sensory neuropathy. Patients with this disease lose pain sensation and frequently need amputation. Axonal dysfunction and degeneration of peripheral sensory neurons is a major clinical manifestation of CMT2B. However, the cellular and molecular pathogenic mechanisms remain undefined. CMT2B is caused by missense point mutations (L129F, K157N, N161T/I, V162M) in Rab7 GTPase. Strong evidence suggests that the Rab7 mutation(s) enhances the cellular levels of activated Rab7 proteins, thus resulting in increased lysosomal activity and autophagy. As a consequence, trafficking and signaling of neurotrophic factors such as nerve growth factor (NGF) in the long axons of peripheral sensory neurons are particularly vulnerable to premature degradation. A “gain of toxicity” model has, thus, been proposed based on these observations. However, studies of fly photo-sensory neurons indicate that the Rab7 mutation(s) causes a “loss of function”, resulting in haploinsufficiency. In the review, we summarize experimental evidence for both hypotheses. We argue that better models (rodent animals and human neurons) of CMT2B are needed to precisely define the disease mechanisms.
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Margiotta A, Progida C, Bakke O, Bucci C. Rab7a regulates cell migration through Rac1 and vimentin. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2016; 1864:367-381. [PMID: 27888097 DOI: 10.1016/j.bbamcr.2016.11.020] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2016] [Revised: 11/09/2016] [Accepted: 11/19/2016] [Indexed: 01/17/2023]
Abstract
Rab7a, a small GTPase of the Rab family, is localized to late endosomes and controls late endocytic trafficking. The discovery of several Rab7a interacting proteins revealed that Rab7a function is closely connected to cytoskeletal elements. Indeed, Rab7a recruits on vesicles RILP and FYCO that are responsible for the movement of Rab7a-positive vesicles and/or organelles on microtubule tracks, but also directly interacts with Rac1, a fundamental regulator of actin cytoskeleton, and with peripherin and vimentin, two intermediate filament proteins. Considering all these interactions and, in particular, the fact that Rac1 and vimentin are key factors for cellular motility, we investigated a possible role of Rab7a in cell migration. We show here that Rab7a is needed for cell migration as Rab7a depletion causes slower migration of NCI H1299 cells affecting cell velocity and directness. Rab7a depletion negatively affects adhesion and spreading onto fibronectin substrates, altering β1-integrin activation, localization and intracellular trafficking, and myosin X localization. In fact, Rab7a-depleted cells show 40% less filopodia and active integrin accumulates at the leading edge of migrating cells. Furthermore, Rab7a depletion decreases the amount of active Rac1 but not its abundance and reduces the number of cells with vimentin filaments facing the wound, indicating that Rab7a has a role in the orientation of vimentin filaments during migration. In conclusion, our results demonstrate a key role of Rab7a in the regulation of different aspects of cell migration.
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Affiliation(s)
- Azzurra Margiotta
- Department of Biological and Environmental Sciences and Technologies, (DiSTeBA) University of Salento, Via Provinciale Monteroni 165, 73100 Lecce, Italy; Department of Biosciences, Centre for Immune Regulation, University of Oslo, Blindernveien 31, 0371 Oslo, Norway
| | - Cinzia Progida
- Department of Biosciences, Centre for Immune Regulation, University of Oslo, Blindernveien 31, 0371 Oslo, Norway.
| | - Oddmund Bakke
- Department of Biosciences, Centre for Immune Regulation, University of Oslo, Blindernveien 31, 0371 Oslo, Norway.
| | - Cecilia Bucci
- Department of Biological and Environmental Sciences and Technologies, (DiSTeBA) University of Salento, Via Provinciale Monteroni 165, 73100 Lecce, Italy.
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Multiple Roles of the Small GTPase Rab7. Cells 2016; 5:cells5030034. [PMID: 27548222 PMCID: PMC5040976 DOI: 10.3390/cells5030034] [Citation(s) in RCA: 267] [Impact Index Per Article: 33.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2016] [Revised: 08/11/2016] [Accepted: 08/12/2016] [Indexed: 12/16/2022] Open
Abstract
Rab7 is a small GTPase that belongs to the Rab family and controls transport to late endocytic compartments such as late endosomes and lysosomes. The mechanism of action of Rab7 in the late endocytic pathway has been extensively studied. Rab7 is fundamental for lysosomal biogenesis, positioning and functions, and for trafficking and degradation of several signaling receptors, thus also having implications on signal transduction. Several Rab7 interacting proteins have being identified leading to the discovery of a number of different important functions, beside its established role in endocytosis. Furthermore, Rab7 has specific functions in neurons. This review highlights and discusses the role and the importance of Rab7 on different cellular pathways and processes.
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Role of Intermediate Filaments in Vesicular Traffic. Cells 2016; 5:cells5020020. [PMID: 27120621 PMCID: PMC4931669 DOI: 10.3390/cells5020020] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2016] [Revised: 04/13/2016] [Accepted: 04/20/2016] [Indexed: 12/28/2022] Open
Abstract
Intermediate filaments are an important component of the cellular cytoskeleton. The first established role attributed to intermediate filaments was the mechanical support to cells. However, it is now clear that intermediate filaments have many different roles affecting a variety of other biological functions, such as the organization of microtubules and microfilaments, the regulation of nuclear structure and activity, the control of cell cycle and the regulation of signal transduction pathways. Furthermore, a number of intermediate filament proteins have been involved in the acquisition of tumorigenic properties. Over the last years, a strong involvement of intermediate filament proteins in the regulation of several aspects of intracellular trafficking has strongly emerged. Here, we review the functions of intermediate filaments proteins focusing mainly on the recent knowledge gained from the discovery that intermediate filaments associate with key proteins of the vesicular membrane transport machinery. In particular, we analyze the current understanding of the contribution of intermediate filaments to the endocytic pathway.
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Liprin-α1 is a regulator of vimentin intermediate filament network in the cancer cell adhesion machinery. Sci Rep 2016; 6:24486. [PMID: 27075696 PMCID: PMC4830931 DOI: 10.1038/srep24486] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Accepted: 03/30/2016] [Indexed: 12/13/2022] Open
Abstract
PPFIA1 is located at the 11q13 region, which is one of the most commonly amplified regions in several epithelial cancers including head and neck squamous cell carcinoma and breast carcinoma. Considering the location of PPFIA1 in this amplicon, we examined whether protein encoded by PPFIA1, liprin-α1, possesses oncogenic properties in relevant carcinoma cell lines. Our results indicate that liprin-α1 localizes to different adhesion and cytoskeletal structures to regulate vimentin intermediate filament network, thereby altering the invasion and growth properties of the cancer cells. In non-invasive cells liprin-α1 promotes expansive growth behavior with limited invasive capacity, whereas in invasive cells liprin-α1 has significant impact on mesenchymal cancer cell invasion in three-dimensional collagen. Current results identify liprin-α1 as a novel regulator of the tumor cell intermediate filaments with differential oncogenic properties in actively proliferating or motile cells.
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De Bock M, Van Haver V, Vandenbroucke RE, Decrock E, Wang N, Leybaert L. Into rather unexplored terrain-transcellular transport across the blood-brain barrier. Glia 2016; 64:1097-123. [DOI: 10.1002/glia.22960] [Citation(s) in RCA: 92] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2015] [Revised: 11/16/2015] [Accepted: 12/03/2015] [Indexed: 01/22/2023]
Affiliation(s)
- Marijke De Bock
- Physiology Group, Department of Basic Medical Sciences; Ghent University; Ghent Belgium
| | - Valérie Van Haver
- Physiology Group, Department of Basic Medical Sciences; Ghent University; Ghent Belgium
| | - Roosmarijn E. Vandenbroucke
- Inflammation Research Center, VIB; Ghent Belgium
- Department of Biomedical Molecular Biology; Ghent University; Ghent Belgium
| | - Elke Decrock
- Physiology Group, Department of Basic Medical Sciences; Ghent University; Ghent Belgium
| | - Nan Wang
- Physiology Group, Department of Basic Medical Sciences; Ghent University; Ghent Belgium
| | - Luc Leybaert
- Physiology Group, Department of Basic Medical Sciences; Ghent University; Ghent Belgium
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Stasi M, De Luca M, Bucci C. Two-hybrid-based systems: powerful tools for investigation of membrane traffic machineries. J Biotechnol 2014; 202:105-17. [PMID: 25529347 DOI: 10.1016/j.jbiotec.2014.12.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2014] [Revised: 12/05/2014] [Accepted: 12/11/2014] [Indexed: 01/18/2023]
Abstract
Protein-protein interactions regulate biological processes and are fundamental for cell functions. Recently, efforts have been made to define interactomes, which are maps of protein-protein interactions that are useful for understanding biological pathways and networks and for investigating how perturbations of these networks lead to diseases. Therefore, interactomes are becoming fundamental for establishing the molecular basis of human diseases and contributing to the discovery of effective therapies. Interactomes are constructed based on experimental data present in the literature and computational predictions of interactions. Several biochemical, genetic and biotechnological techniques have been used in the past to identify protein-protein interactions. The yeast two-hybrid system has beyond doubt represented a revolution in the field, being a versatile tool and allowing the immediate identification of the interacting proteins and isolation of the cDNA coding for the interacting peptide after in vivo screening. Recently, variants of the yeast two-hybrid assay have been developed, including high-throughput systems that promote the rapidly growing field of proteomics. In this review we will focus on the role of this technique in the discovery of Rab interacting proteins, highlighting the importance of high-throughput two-hybrid screening as a tool to study the complexity of membrane traffic machineries.
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Affiliation(s)
- Mariangela Stasi
- Department of Biological and Environmental Sciences and Technologies (DiSTeBA), University of Salento, Lecce, Italy
| | - Maria De Luca
- Department of Biological and Environmental Sciences and Technologies (DiSTeBA), University of Salento, Lecce, Italy
| | - Cecilia Bucci
- Department of Biological and Environmental Sciences and Technologies (DiSTeBA), University of Salento, Lecce, Italy.
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Pan Y, Li X, Duan J, Yuan L, Fan S, Fan J, Xiaokaiti Y, Yang H, Wang Y, Li X. Enoxaparin sensitizes human non-small-cell lung carcinomas to gefitinib by inhibiting DOCK1 expression, vimentin phosphorylation, and Akt activation. Mol Pharmacol 2014; 87:378-90. [PMID: 25488183 DOI: 10.1124/mol.114.094425] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Gefitinib is widely used for the treatment of lung cancer in patients with sensitizing epidermal growth factor receptor mutations, but patients tend to develop resistance after an average of 10 months. Low molecular weight heparins, such as enoxaparin, potently inhibit experimental metastasis. This study aimed to determine the potential of combined enoxaparin and gefitinib (enoxaparin + gefitinib) treatment to inhibit tumor resistance to gefitinib both in vitro and in vivo. A549 and H1975 cell migration was analyzed in wound closure and Transwell assays. Akt and extracellular signal-related kinase 1/2 signaling pathways were identified, and a proteomics analysis was conducted using SDS-PAGE/liquid chromatography-tandem mass spectrometry analysis. Molecular interaction networks were visualized using the Cytoscape bioinformatics platform. Protein expression of dedicator of cytokinesis 1 (DOCK1) and cytoskeleton intermediate filament vimentin were identified using an enzyme-linked immunosorbent assay, Western blot, and small interfering RNA transfection of A549 cells. In xenograft A549-luc-C8 tumors in nude mice, enoxaparin + gefitinib inhibited tumor growth and reduced lung colony formation compared with gefitinib alone. Furthermore, the combination had stronger inhibitory effects on cell migration than either agent used individually. Additional enoxaparin administration resulted in better effective inhibition of Akt activity compared with gefitinib alone. Proteomics and network analysis implicated DOCK1 as the key node molecule. Western blot verified the effective inhibition of the expression of DOCK1 and vimentin phosphorylation by enoxaparin + gefitinib compared with gefitinib alone. DOCK1 knockdown confirmed its role in cell migration, Akt expression, and vimentin phosphorylation. Our data indicate that enoxaparin sensitizes gefitinib antitumor and antimigration activity in lung cancer by suppressing DOCK1 expression, Akt activity, and vimentin phosphorylation.
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Affiliation(s)
- Yan Pan
- State Key Laboratory of Natural and Biomimetic Drugs, Department of Pharmacology, School of Basic Medical Sciences, Health Science Center and Beijing Key Laboratory of Tumor Systems Biology, Peking University, Beijing, People's Republic of China (Y.P., X.L., J.D., S.F., J.F., Y.X., H.Y., Y.W., X.L.); and Medical and Healthy Analytical Center, Peking University Health Science Center, Beijing, People's Republic of China (L.Y.)
| | - Xin Li
- State Key Laboratory of Natural and Biomimetic Drugs, Department of Pharmacology, School of Basic Medical Sciences, Health Science Center and Beijing Key Laboratory of Tumor Systems Biology, Peking University, Beijing, People's Republic of China (Y.P., X.L., J.D., S.F., J.F., Y.X., H.Y., Y.W., X.L.); and Medical and Healthy Analytical Center, Peking University Health Science Center, Beijing, People's Republic of China (L.Y.)
| | - Jianhui Duan
- State Key Laboratory of Natural and Biomimetic Drugs, Department of Pharmacology, School of Basic Medical Sciences, Health Science Center and Beijing Key Laboratory of Tumor Systems Biology, Peking University, Beijing, People's Republic of China (Y.P., X.L., J.D., S.F., J.F., Y.X., H.Y., Y.W., X.L.); and Medical and Healthy Analytical Center, Peking University Health Science Center, Beijing, People's Republic of China (L.Y.)
| | - Lan Yuan
- State Key Laboratory of Natural and Biomimetic Drugs, Department of Pharmacology, School of Basic Medical Sciences, Health Science Center and Beijing Key Laboratory of Tumor Systems Biology, Peking University, Beijing, People's Republic of China (Y.P., X.L., J.D., S.F., J.F., Y.X., H.Y., Y.W., X.L.); and Medical and Healthy Analytical Center, Peking University Health Science Center, Beijing, People's Republic of China (L.Y.)
| | - Shengjun Fan
- State Key Laboratory of Natural and Biomimetic Drugs, Department of Pharmacology, School of Basic Medical Sciences, Health Science Center and Beijing Key Laboratory of Tumor Systems Biology, Peking University, Beijing, People's Republic of China (Y.P., X.L., J.D., S.F., J.F., Y.X., H.Y., Y.W., X.L.); and Medical and Healthy Analytical Center, Peking University Health Science Center, Beijing, People's Republic of China (L.Y.)
| | - Jingpu Fan
- State Key Laboratory of Natural and Biomimetic Drugs, Department of Pharmacology, School of Basic Medical Sciences, Health Science Center and Beijing Key Laboratory of Tumor Systems Biology, Peking University, Beijing, People's Republic of China (Y.P., X.L., J.D., S.F., J.F., Y.X., H.Y., Y.W., X.L.); and Medical and Healthy Analytical Center, Peking University Health Science Center, Beijing, People's Republic of China (L.Y.)
| | - Yilixiati Xiaokaiti
- State Key Laboratory of Natural and Biomimetic Drugs, Department of Pharmacology, School of Basic Medical Sciences, Health Science Center and Beijing Key Laboratory of Tumor Systems Biology, Peking University, Beijing, People's Republic of China (Y.P., X.L., J.D., S.F., J.F., Y.X., H.Y., Y.W., X.L.); and Medical and Healthy Analytical Center, Peking University Health Science Center, Beijing, People's Republic of China (L.Y.)
| | - Haopeng Yang
- State Key Laboratory of Natural and Biomimetic Drugs, Department of Pharmacology, School of Basic Medical Sciences, Health Science Center and Beijing Key Laboratory of Tumor Systems Biology, Peking University, Beijing, People's Republic of China (Y.P., X.L., J.D., S.F., J.F., Y.X., H.Y., Y.W., X.L.); and Medical and Healthy Analytical Center, Peking University Health Science Center, Beijing, People's Republic of China (L.Y.)
| | - Yefan Wang
- State Key Laboratory of Natural and Biomimetic Drugs, Department of Pharmacology, School of Basic Medical Sciences, Health Science Center and Beijing Key Laboratory of Tumor Systems Biology, Peking University, Beijing, People's Republic of China (Y.P., X.L., J.D., S.F., J.F., Y.X., H.Y., Y.W., X.L.); and Medical and Healthy Analytical Center, Peking University Health Science Center, Beijing, People's Republic of China (L.Y.)
| | - Xuejun Li
- State Key Laboratory of Natural and Biomimetic Drugs, Department of Pharmacology, School of Basic Medical Sciences, Health Science Center and Beijing Key Laboratory of Tumor Systems Biology, Peking University, Beijing, People's Republic of China (Y.P., X.L., J.D., S.F., J.F., Y.X., H.Y., Y.W., X.L.); and Medical and Healthy Analytical Center, Peking University Health Science Center, Beijing, People's Republic of China (L.Y.)
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Zhang X, Liu W, Yang H, Tan L, Ao L, Liu J, Cao J, Cui Z. Inhibition of PPARα attenuates vimentin phosphorylation on Ser-83 and collapse of vimentin filaments during exposure of rat Sertoli cells in vitro to DBP. Reprod Toxicol 2014; 50:11-8. [PMID: 25291543 DOI: 10.1016/j.reprotox.2014.09.015] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2014] [Revised: 09/24/2014] [Accepted: 09/25/2014] [Indexed: 12/18/2022]
Abstract
Dibutyl phthalate (DBP) is a peroxisome proliferator which can lead to germ cell loss from Sertoli cells. Collapse of vimentin filaments occurs in Sertoli cells after DBP exposure. Peroxisome proliferator activated receptor α (PPARα) is a key receptor which could be activated by DBP. The role of PPARα in this process was investigated. Results showed that, PPARα was activated in DBP-exposed Sertoli cells, GW6471 inhibited the activity of PPARα, phosphorylation level of vimentin and concentration of soluble vimentin was higher in DBP-treated Sertoli cells than GW6471+DBP-treated cells. These results suggest that PPARα directly or indirectly mediated phosphorylation of vimentin on Ser 83, and PPARα may play an important role in regulating the reorganization of vimentin filaments during exposure of Sertoli cells to DBP.
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Affiliation(s)
- Xi Zhang
- Toxicology Institute, College of Preventive Medicine, Third Military Medical University, No. 30, Gaotanyan Road, Shapingba District, Chongqing 400038, China.
| | - Wenbin Liu
- Toxicology Institute, College of Preventive Medicine, Third Military Medical University, No. 30, Gaotanyan Road, Shapingba District, Chongqing 400038, China.
| | - Huan Yang
- Toxicology Institute, College of Preventive Medicine, Third Military Medical University, No. 30, Gaotanyan Road, Shapingba District, Chongqing 400038, China.
| | - Lu Tan
- Toxicology Institute, College of Preventive Medicine, Third Military Medical University, No. 30, Gaotanyan Road, Shapingba District, Chongqing 400038, China.
| | - Lin Ao
- Toxicology Institute, College of Preventive Medicine, Third Military Medical University, No. 30, Gaotanyan Road, Shapingba District, Chongqing 400038, China.
| | - Jinyi Liu
- Toxicology Institute, College of Preventive Medicine, Third Military Medical University, No. 30, Gaotanyan Road, Shapingba District, Chongqing 400038, China.
| | - Jia Cao
- Toxicology Institute, College of Preventive Medicine, Third Military Medical University, No. 30, Gaotanyan Road, Shapingba District, Chongqing 400038, China.
| | - Zhihong Cui
- Toxicology Institute, College of Preventive Medicine, Third Military Medical University, No. 30, Gaotanyan Road, Shapingba District, Chongqing 400038, China.
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De Luca M, Cogli L, Progida C, Nisi V, Pascolutti R, Sigismund S, Di Fiore PP, Bucci C. The Rab-interacting lysosomal protein (RILP) regulates vacuolar ATPase acting on the V1G1 subunit. J Cell Sci 2014; 127:2697-708. [DOI: 10.1242/jcs.142604] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
RILP is a downstream effector of the Rab7 GTPase. GTP-bound Rab7 recruits RILP on endosomal membranes and, together, they control late endocytic traffic, phagosome and autophagosome maturation and are responsible for signaling receptor degradation. We have identified, using different approaches, the V1G1 subunit of the vacuolar ATPase (V-ATPase) as a RILP interacting protein. V1G1 is a component of the peripheral stalk and it is fundamental for correct V-ATPase assembly. We established that RILP regulates the recruitment of V1G1 subunit to late endosomal/lysosomal membranes but also controls V1G1 stability. Indeed, we demonstrated that V1G1 is ubiquitinated and that RILP is responsible for proteasomal degradation of V1G1. Furthermore, we demonstrated that alterations of V1G1 expression levels impair V-ATPase activity. Thus, our data demonstrate for the first time that RILP regulates the activity of the V-ATPase through the interaction with V1G1. Given the importance of V-ATPase in several cellular processes and human diseases, these data suggest that modulation of RILP activity could be used to control V-ATPase function.
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Bakke O, Progida C. Emerging regulators of endosomal dynamics during mitosis. Cell Cycle 2013; 13:349-50. [PMID: 24343117 DOI: 10.4161/cc.27547] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Affiliation(s)
- Oddmund Bakke
- Department of Biosciences; Centre of Immune Regulation; University of Oslo; Oslo, Norway
| | - Cinzia Progida
- Department of Biosciences; Centre of Immune Regulation; University of Oslo; Oslo, Norway
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