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Ariano C, Riganti C, Corà D, Valdembri D, Mana G, Astanina E, Serini G, Bussolino F, Doronzo G. TFEB controls integrin-mediated endothelial cell adhesion by the regulation of cholesterol metabolism. Angiogenesis 2022; 25:471-492. [PMID: 35545719 PMCID: PMC9519734 DOI: 10.1007/s10456-022-09840-x] [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: 11/15/2021] [Accepted: 04/18/2022] [Indexed: 11/30/2022]
Abstract
The dynamic integrin-mediated adhesion of endothelial cells (ECs) to the surrounding ECM is fundamental for angiogenesis both in physiological and pathological conditions, such as embryonic development and cancer progression. The dynamics of EC-to-ECM adhesions relies on the regulation of the conformational activation and trafficking of integrins. Here, we reveal that oncogenic transcription factor EB (TFEB), a known regulator of lysosomal biogenesis and metabolism, also controls a transcriptional program that influences the turnover of ECM adhesions in ECs by regulating cholesterol metabolism. We show that TFEB favors ECM adhesion turnover by promoting the transcription of genes that drive the synthesis of cholesterol, which promotes the aggregation of caveolin-1, and the caveolin-dependent endocytosis of integrin β1. These findings suggest that TFEB might represent a novel target for the pharmacological control of pathological angiogenesis and bring new insights in the mechanism sustaining TFEB control of endocytosis.
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Affiliation(s)
- Camilla Ariano
- Department of Oncology, University of Torino, Candiolo, Italy.,Candiolo Cancer Institute- FPO-IRCCS, Candiolo, Italy
| | - Chiara Riganti
- Department of Oncology, University of Torino, Torino, Italy
| | - Davide Corà
- Department of Translational Medicine, Piemonte Orientale University, Novara, Italy.,Center for Translational Research on Autoimmune and Allergic Diseases-CAAD, Novara, Italy
| | - Donatella Valdembri
- Department of Oncology, University of Torino, Candiolo, Italy.,Candiolo Cancer Institute- FPO-IRCCS, Candiolo, Italy
| | - Giulia Mana
- Department of Oncology, University of Torino, Candiolo, Italy.,Candiolo Cancer Institute- FPO-IRCCS, Candiolo, Italy
| | - Elena Astanina
- Department of Oncology, University of Torino, Candiolo, Italy.,Candiolo Cancer Institute- FPO-IRCCS, Candiolo, Italy
| | - Guido Serini
- Department of Oncology, University of Torino, Candiolo, Italy.,Candiolo Cancer Institute- FPO-IRCCS, Candiolo, Italy
| | - Federico Bussolino
- Department of Oncology, University of Torino, Candiolo, Italy. .,Candiolo Cancer Institute- FPO-IRCCS, Candiolo, Italy.
| | - Gabriella Doronzo
- Department of Oncology, University of Torino, Candiolo, Italy. .,Candiolo Cancer Institute- FPO-IRCCS, Candiolo, Italy.
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Erusappan P, Alam J, Lu N, Zeltz C, Gullberg D. Integrin α11 cytoplasmic tail is required for FAK activation to initiate 3D cell invasion and ERK-mediated cell proliferation. Sci Rep 2019; 9:15283. [PMID: 31653900 PMCID: PMC6814791 DOI: 10.1038/s41598-019-51689-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Accepted: 09/10/2019] [Indexed: 12/31/2022] Open
Abstract
Integrin α11β1 is a collagen-binding integrin, which is receiving increasing attention in the context of wound healing and fibrosis. Although α11β1 integrin displays similar collagen specificity to α2β1 integrin, both integrins have distinct in vivo functions. In this context, the contribution of α11 subunit cytoplasmic tail interactions to diverse molecular signals and biological functions is largely unknown. In the current study, we have deleted the α11 cytoplasmic tail and studied the effect of this deletion on α11 integrin function. Compared to wild-type cells, C2C12 cells expressing tail-less α11 attached normally to collagen I, but formed fewer focal contacts. α11-tail-less cells furthermore displayed a reduced capacity to invade and reorganize a 3D collagen matrix and to proliferate. Analysis of cell signaling showed that FAK and ERK phosphorylation was reduced in cells expressing tail-less α11. Inhibition of ERK and FAK activation decreased α11-mediated cell proliferation, whereas α11-mediated cell invasion was FAK-dependent and occurred independently of ERK signaling. In summary, our data demonstrate that the integrin α11 cytoplasmic tail plays a central role in α11 integrin-specific functions, including FAK-dependent ERK activation to promote cell proliferation.
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Affiliation(s)
- Pugazendhi Erusappan
- Department of Biomedicine and Center of Cancer Biomarkers, University of Bergen, Jonas Lies vei 91, N-5009, Bergen, Norway.,Institute for Experimental Medical Research, Oslo University Hospital and University of Oslo, Kirkeveien 166, 0450, Oslo, Norway
| | - Jahedul Alam
- Department of Biomedicine and Center of Cancer Biomarkers, University of Bergen, Jonas Lies vei 91, N-5009, Bergen, Norway
| | - Ning Lu
- Department of Biomedicine and Center of Cancer Biomarkers, University of Bergen, Jonas Lies vei 91, N-5009, Bergen, Norway
| | - Cédric Zeltz
- Department of Biomedicine and Center of Cancer Biomarkers, University of Bergen, Jonas Lies vei 91, N-5009, Bergen, Norway.,Princess Margaret Cancer Center, University Health Network, 101 College Street, Toronto, ON, M5G 1L7, Canada
| | - Donald Gullberg
- Department of Biomedicine and Center of Cancer Biomarkers, University of Bergen, Jonas Lies vei 91, N-5009, Bergen, Norway.
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Thinn AMM, Wang Z, Zhu J. The membrane-distal regions of integrin α cytoplasmic domains contribute differently to integrin inside-out activation. Sci Rep 2018; 8:5067. [PMID: 29568062 PMCID: PMC5864728 DOI: 10.1038/s41598-018-23444-w] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2017] [Accepted: 03/13/2018] [Indexed: 12/20/2022] Open
Abstract
Functioning as signal receivers and transmitters, the integrin α/β cytoplasmic tails (CT) are pivotal in integrin activation and signaling. 18 α integrin subunits share a conserved membrane-proximal region but have a highly diverse membrane-distal (MD) region at their CTs. Recent studies demonstrated that the presence of α CTMD region is essential for talin-induced integrin inside-out activation. However, it remains unknown whether the non-conserved α CTMD regions differently regulate the inside-out activation of integrin. Using αIIbβ3, αLβ2, and α5β1 as model integrins and by replacing their α CTMD regions with those of α subunits that pair with β3, β2, and β1 subunits, we analyzed the function of CTMD regions of 17 α subunits in talin-mediated integrin activation. We found that the α CTMD regions play two roles on integrin, which are activation-supportive and activation-regulatory. The regulatory but not the supportive function depends on the sequence identity of α CTMD region. A membrane-proximal tyrosine residue present in the CTMD regions of a subset of α integrins was identified to negatively regulate integrin inside-out activation. Our study provides a useful resource for investigating the function of α integrin CTMD regions.
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Affiliation(s)
- Aye Myat Myat Thinn
- Blood Research Institute, BloodCenter of Wisconsin, Milwaukee, WI, 53226, USA
- Department of Biochemistry, Medical College of Wisconsin, Milwaukee, WI, 53226, USA
| | - Zhengli Wang
- Blood Research Institute, BloodCenter of Wisconsin, Milwaukee, WI, 53226, USA
| | - Jieqing Zhu
- Blood Research Institute, BloodCenter of Wisconsin, Milwaukee, WI, 53226, USA.
- Department of Biochemistry, Medical College of Wisconsin, Milwaukee, WI, 53226, USA.
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Tensins: Bridging AMP-Activated Protein Kinase with Integrin Activation. Trends Cell Biol 2017; 27:703-711. [DOI: 10.1016/j.tcb.2017.06.004] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Revised: 06/15/2017] [Accepted: 06/20/2017] [Indexed: 12/25/2022]
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Jiao Y, Tan S, Xiong J. Proteomic changes of CD4 +/CD25 +/forkhead box p3 + regulatory T cells in a 30-day rat model of sepsis survival. Exp Ther Med 2017; 14:5619-5628. [PMID: 29285101 DOI: 10.3892/etm.2017.5233] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Accepted: 07/20/2017] [Indexed: 02/07/2023] Open
Abstract
Sepsis is defined as life threatening organ dysfunction arising from a dysregulated host response to infection. The outcomes of sepsis include early mortality, delayed mortality and recovery, and depend on the inflammatory response. Previous studies have demonstrated that regulatory T cells (Tregs) are important in determining the outcome of sepsis, as their suppressive function serves a role in maintaining immune homeostasis. However, Treg-mediated immunosuppression during the course of sepsis remains unclear and little is known about the survival of patients following diagnosis. Studying the survivors of sepsis may explain the mechanisms of natural recovery. Therefore, a 30-day rat model of sepsis survival was established in the current study. Cluster of differentiation CD4+/CD25+/forkhead box p3+ Tregs were isolated from the blood and spleens of rats undergoing cecal ligation and puncture or sham surgery, using flow cytometry. Proteomic analysis was performed using nano high-performance liquid chromatography-mass spectrometry. Several different biological pathways associated with uncommon differentially-expressed proteins were identified in the blood and spleen survivor and sham groups. Extracellular-regulated kinase/mitogen-activated protein kinase, as well as integrin and actin cytoskeletal pathway elements, including Ras-related protein 1b, talin 1 and filamin A, were associated with Tregs in the blood. Pathway elements associated with cell cycle regulators in the B-cell translocation gene family of proteins, tumor necrosis factor receptor superfamily member 4, Hippo signaling, P70-S6 kinase 1, phosphatidylinositol 3-kinase/protein kinase B signaling and 1,25-dihydroxyvitamin D3 biosynthesis were associated with Tregs from the spleen including phosphatase 2A activator regulatory factor 4, histone arginine methyltransferase, CD4, major histocompatibility complex class I antigens, 14-3-3 protein θ and nicotinamide adenine dinucleotide phosphate cytochrome P450 reductase. These results explain the mechanism by which Tregs naturally recover and indicates that Tregs in the blood and spleen vary. Differentially-expressed proteins serving a role in these pathways provide additional insight for the identification of new targets for the diagnosis and treatment of sepsis.
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Affiliation(s)
- Yuxia Jiao
- Department of Anesthesiology, The Second Hospital of Dalian Medical University, Dalian, Liaoning 116027, P.R. China
| | - Siqi Tan
- Department of Anesthesiology, The Second Hospital of Dalian Medical University, Dalian, Liaoning 116027, P.R. China
| | - Junyu Xiong
- Department of Anesthesiology, The Second Hospital of Dalian Medical University, Dalian, Liaoning 116027, P.R. China
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