1
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Hsu PH, Chen YH, Huang PI, Hwang PA. Skin proteomic profiling of irradiation-induced fibrosis and its modulation by low molecular weight fucoidan via tight junction pathway. Biomed Pharmacother 2022; 153:113417. [DOI: 10.1016/j.biopha.2022.113417] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Revised: 07/10/2022] [Accepted: 07/13/2022] [Indexed: 11/02/2022] Open
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2
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Barik GK, Sahay O, Paul D, Santra MK. Ezrin gone rogue in cancer progression and metastasis: An enticing therapeutic target. Biochim Biophys Acta Rev Cancer 2022; 1877:188753. [PMID: 35752404 DOI: 10.1016/j.bbcan.2022.188753] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Revised: 06/16/2022] [Accepted: 06/18/2022] [Indexed: 12/12/2022]
Abstract
Cancer metastasis is the primary cause of morbidity and mortality in cancer as it remains the most complicated, devastating, and enigmatic aspect of cancer. Several decades of extensive research have identified several key players closely associated with metastasis. Among these players, cytoskeletal linker Ezrin (the founding member of the ERM (Ezrin-Radixin-Moesin) family) was identified as a critical promoter of metastasis in pediatric cancers in the early 21st century. Ezrin was discovered 40 years ago as a aminor component of intestinal epithelial microvillus core protein, which is enriched in actin-containing cell surface structures. It controls gastric acid secretion and plays diverse physiological roles including maintaining cell polarity, regulating cell adhesion, cell motility and morphogenesis. Extensive research for more than two decades evinces that Ezrin is frequently dysregulated in several human cancers. Overexpression, altered subcellular localization and/or aberrant activation of Ezrin are closely associated with higher metastatic incidence and patient mortality, thereby justifying Ezrin as a valuable prognostic biomarker in cancer. Ezrin plays multifaceted role in multiple aspects of cancer, with its significant contribution in the complex metastatic cascade, through reorganizing the cytoskeleton and deregulating various cellular signaling pathways. Current preclinical studies using genetic and/or pharmacological approaches reveal that inactivation of Ezrin results in significant inhibition of Ezrin-mediated tumor growth and metastasis as well as increase in the sensitivity of cancer cells to various chemotherapeutic drugs. In this review, we discuss the recent advances illuminating the molecular mechanisms responsible for Ezrin dysregulation in cancer and its pleiotropic role in cancer progression and metastasis. We also highlight its potential as a prognostic biomarker and therapeutic target in various cancers. More importantly, we put forward some potential questions, which we strongly believe, will stimulate both basic and translational research to better understand Ezrin-mediated malignancy, ultimately leading to the development of Ezrin-targeted cancer therapy for the betterment of human life.
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Affiliation(s)
- Ganesh Kumar Barik
- Cancer Biology Division, National Centre for Cell Science, Ganeshkhind Road, Pune, Maharashtra 411007, India; Department of Biotechnology, Savitribai Phule Pune University, Ganeshkhind Road, Pune, Maharashtra 411007, India
| | - Osheen Sahay
- Cancer Biology Division, National Centre for Cell Science, Ganeshkhind Road, Pune, Maharashtra 411007, India; Department of Biotechnology, Savitribai Phule Pune University, Ganeshkhind Road, Pune, Maharashtra 411007, India
| | - Debasish Paul
- Laboratory of Cancer Biology and Genetics, Centre for Cancer Research, National Cancer Institute, Bethesda, MD, USA
| | - Manas Kumar Santra
- Cancer Biology Division, National Centre for Cell Science, Ganeshkhind Road, Pune, Maharashtra 411007, India.
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Qureshi-Baig K, Kuhn D, Viry E, Pozdeev VI, Schmitz M, Rodriguez F, Ullmann P, Koncina E, Nurmik M, Frasquilho S, Nazarov PV, Zuegel N, Boulmont M, Karapetyan Y, Antunes L, Val D, Mittelbronn M, Janji B, Haan S, Letellier E. Hypoxia-induced autophagy drives colorectal cancer initiation and progression by activating the PRKC/PKC-EZR (ezrin) pathway. Autophagy 2020; 16:1436-1452. [PMID: 31775562 PMCID: PMC7469473 DOI: 10.1080/15548627.2019.1687213] [Citation(s) in RCA: 113] [Impact Index Per Article: 28.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Revised: 10/11/2019] [Accepted: 10/21/2019] [Indexed: 12/20/2022] Open
Abstract
In solid tumors, cancer stem cells (CSCs) or tumor-initiating cells (TICs) are often found in hypoxic niches. Nevertheless, the influence of hypoxia on TICs is poorly understood. Using previously established, TIC-enrichedpatient-derived colorectal cancer (CRC) cultures, we show that hypoxia increases the self-renewal capacity of TICs while inducing proliferation arrest in their more differentiated counterpart cultures. Gene expression data revealed macroautophagy/autophagy as one of the major pathways induced by hypoxia in TICs. Interestingly, hypoxia-induced autophagy was found to induce phosphorylation of EZR (ezrin) at Thr567 residue, which could be reversed by knocking down ATG5, BNIP3, BNIP3L, or BECN1. Furthermore, we identified PRKCA/PKCα as a potential kinase involved in hypoxia-induced autophagy-mediated TIC self-renewal. Genetic targeting of autophagy or pharmacological inhibition of PRKC/PKC and EZR resulted in decreased tumor-initiating potential of TICs. In addition, we observed significantly reduced in vivo tumor initiation and growth after a stable knockdown of ATG5. Analysis of human CRC samples showed that p-EZR is often present in TICs located in the hypoxic and autophagic regions of the tumor. Altogether, our results establish the hypoxia-autophagy-PKC-EZR signaling axis as a novel regulatory mechanism of TIC self-renewal and CRC progression. Autophagy inhibition might thus represent a promising therapeutic strategy for cancer patients. ABBREVIATIONS ATG: autophagy related; BECN1: beclin 1; BNIP3: BCL2 interacting protein 3; BNIP3L: BCL2 interacting protein 3 like; CQ: chloroquine; CSC: cancer stem cells; CRC: colorectal cancer; HIF1A/HIF-1α: hypoxia inducible factor 1 subunit alpha; MAP1LC3/LC3: microtubule associated protein 1 light chain 3; PRKC/PKC: protein kinase C; SQSTM1/p62: sequestosome 1; TICs: tumor-initiating cells.
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Affiliation(s)
- Komal Qureshi-Baig
- Molecular Disease Mechanisms Group, Life Sciences Research Unit, University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | - Diana Kuhn
- Molecular Disease Mechanisms Group, Life Sciences Research Unit, University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | - Elodie Viry
- Molecular Disease Mechanisms Group, Life Sciences Research Unit, University of Luxembourg, Esch-sur-Alzette, Luxembourg
- Laboratory of Experimental Cancer Research, Luxembourg Institute of Health, Strassen, Luxembourg
| | - Vitaly I. Pozdeev
- Molecular Disease Mechanisms Group, Life Sciences Research Unit, University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | - Martine Schmitz
- Molecular Disease Mechanisms Group, Life Sciences Research Unit, University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | - Fabien Rodriguez
- Molecular Disease Mechanisms Group, Life Sciences Research Unit, University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | - Pit Ullmann
- Molecular Disease Mechanisms Group, Life Sciences Research Unit, University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | - Eric Koncina
- Molecular Disease Mechanisms Group, Life Sciences Research Unit, University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | - Martin Nurmik
- Molecular Disease Mechanisms Group, Life Sciences Research Unit, University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | | | - Petr V. Nazarov
- Proteome and Genome Research Unit, Luxembourg Institute of Health, Strassen, Luxembourg
| | - Nikolaus Zuegel
- Department of Surgery, Centre Hospitalier Emile Mayrisch, Esch-sur-Alzette, Luxembourg
| | - Marc Boulmont
- Department of Surgery, Centre Hospitalier Emile Mayrisch, Esch-sur-Alzette, Luxembourg
| | | | - Laurent Antunes
- Integrated Biobank of Luxembourg, Dudelange, Luxembourg
- Department of Anatomic and Molecular Pathology, Laboratoire National de Santé (LNS), Dudelange, Luxembourg
| | - Daniel Val
- Department of Anatomic and Molecular Pathology, Laboratoire National de Santé (LNS), Dudelange, Luxembourg
| | - Michel Mittelbronn
- Department of Anatomic and Molecular Pathology, Laboratoire National de Santé (LNS), Dudelange, Luxembourg
- Luxembourg Centre for Systems Biomedicine (LCSB), University of Luxembourg, Esch-sur-Alzette, Luxembourg
- NORLUX Neuro-Oncology Laboratory, Luxembourg Institute of Health (LIH), Strassen, Luxembourg
- Luxembourg Centre of Neuropathology (LCNP), Dudelange, Luxembourg
| | - Bassam Janji
- Laboratory of Experimental Cancer Research, Luxembourg Institute of Health, Strassen, Luxembourg
| | - Serge Haan
- Molecular Disease Mechanisms Group, Life Sciences Research Unit, University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | - Elisabeth Letellier
- Molecular Disease Mechanisms Group, Life Sciences Research Unit, University of Luxembourg, Esch-sur-Alzette, Luxembourg
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4
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Chen C, Ye C, Xia J, Zhou Y, Wu R. Ezrin T567 phosphorylation regulates migration and invasion of ectopic endometrial stromal cells by changing actin cytoskeleton. Life Sci 2020; 254:117681. [PMID: 32380081 DOI: 10.1016/j.lfs.2020.117681] [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: 12/10/2019] [Revised: 03/31/2020] [Accepted: 04/14/2020] [Indexed: 01/15/2023]
Abstract
AIMS The enhanced ability of endometrial cell migration and invasion is the foundation for formation of ectopic lesions in endometriosis. Ezrin has been reported to regulate cell motility by remodeling the cytoskeleton. However, little is known about the mechanisms through which ezrin remodels the cytoskeleton and cell structure to promote cell motility in endometriosis. METHODS In our study, expression and distribution of ezrin, and Rho pathway were detected through immunohistochemical analysis. The effects of inhibiting ezrin T567 phosphorylation on Rho signaling pathway and cytoskeleton were investigated through western blot, transmission electron microscopy and immunofluorescence analysis. KEY FINDINGS We found that the expression of ezrin and Rho pathway was higher in ectopic endometrium. NSC305787 inhibited the phosphorylation of ezrin T567, resulting in decreased expression of Rho pathway and reduced filopodia formation in ectopic endometrial stromal cells. SIGNIFICANCE Taken together, our study suggested that ezrin T567 phosphorylation modulated migration and invasion of ectopic ESCs through actin reconstructions, which may serve as a novel therapeutic target in ovarian endometriosis.
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Affiliation(s)
- Chaolu Chen
- Department of Gynecology, Women's Hospital, School of Medicine, Zhejiang University, Zhejiang 310006, China
| | - Chaoshuang Ye
- Department of Gynecology, Women's Hospital, School of Medicine, Zhejiang University, Zhejiang 310006, China
| | - Jianmei Xia
- Department of Obstetrics and Gynecology, Hangzhou First People's Hospital, Zhejiang 310006, China
| | - Yong Zhou
- Department of Gynecology, Women's Hospital, School of Medicine, Zhejiang University, Zhejiang 310006, China
| | - Ruijin Wu
- Department of Gynecology, Women's Hospital, School of Medicine, Zhejiang University, Zhejiang 310006, China.
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Gomez AP, Moreno MJ, Hernández A. Adventitial growth and lung connective tissue growth factor expression in pulmonary arterioles due to hypobaric hypoxia in broilers. Poult Sci 2020; 99:1832-1837. [PMID: 32241463 PMCID: PMC7587700 DOI: 10.3382/ps/pez157] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2018] [Accepted: 03/11/2019] [Indexed: 11/25/2022] Open
Abstract
Forty broilers maintained under natural hypobaric hypoxia (2,638 m above sea level) and 20 maintained under relative normoxia (460 m above sea level) were selected as pulmonary hypertensive (PHB) and nonpulmonary hypertensive (NPHB), to estimate the degree of the adventitial vascular thickness in lung arterioles and connective tissue growth factor (CTGF) expression in lung. In each group, the adventitial thickness (%AT) of 20 arterioles with 100 to 250 μm of external diameter was measured in lung samples of 24 and 42-day-old broilers. Also, mRNA extraction and real-time reverse transcription-PCR analysis were used to measure lung CTGF expression. The %AT was higher in PHB at 42 D as compared to NPHB at both ages and PHB at 24 D; however, the same differences were not evidenced at 24 D. In the 2 ages evaluated, differences were observed in the %AT between broilers under hypobaric hypoxia (PHB and NPHB) and under relative normoxia (P < 0.01). In broilers subjected to relative normoxia, no significant differences were found at any of the 2 ages. The expression levels of CTGF mRNA were higher in PHB compared to NPHB at the 2 ages. The %AT was higher in PHB with high levels of expression of CTGF mRNA than those NPHB with low expression of CTGF mRNA. This study showed that adventitial thickening is part of the pulmonary hypertension (PH) physiopathology in broilers exposed to hypobaric hypoxia, in which CTGF appears to be a fibrosis enhancer. Although present data suggest that adventitial engrossment could be a time-dependent process, individual susceptibility and the variable time-course of PH pathophysiology have to be considered.
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Affiliation(s)
- A P Gomez
- Facultad de Medicina Veterinaria y de Zootecnia, Universidad Nacional de Colombia, Bogotá DC 111311, Colombia
| | - M J Moreno
- Facultad de Medicina Veterinaria y de Zootecnia, Universidad Nacional de Colombia, Bogotá DC 111311, Colombia
| | - A Hernández
- Facultad de Medicina Veterinaria y de Zootecnia, Universidad Nacional de Colombia, Bogotá DC 111311, Colombia.
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Chen Y, Yang C, Li Y, Chen L, Yang Y, Belguise K, Wang X, Lu K, Yi B. MiR145-5p inhibits proliferation of PMVECs via PAI-1 in experimental hepatopulmonary syndrome rat pulmonary microvascular hyperplasia. Biol Open 2019; 8:bio.044800. [PMID: 31649116 PMCID: PMC6899039 DOI: 10.1242/bio.044800] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Hepatopulmonary syndrome (HPS) is a triad of advanced liver disease, intrapulmonary vasodilatation and arterial hypoxemia. Increasing evidence shows that HPS is associated with pulmonary microvascular hyperplasia. The aim of this work was to investigate the underlying mechanism of miR-145 in regulating the proliferation of pulmonary microvascular endothelial cells (PMVECs) and angiogenesis in HPS via plasminogen activator inhibitor-1 (PAI-1). To test this, morphology score and number of pulmonary microvascular were assessed in lung tissues from rats with HPS by Hematoxylin and Eosin (H&E) staining. Expression levels of PAI-1 were assessed in lung tissues from HPS rats, as well as in PMVECs treated with HPS rat serum. We also selected the putative microRNA binding site on PAI-1 by bioinformatics analysis. Then, miR145-3p and miR145-5p expression levels in the lungs and PMVECs of rats were detected by qRT-PCR because miR145-5p is a microRNA binding site on PAI-1. In addition, the effects of miR-145-5p regulation on PAI-1 were examined by upregulation and downregulation of miR-145-5p and specific lentivirus transfection was used to overexpress and knockdown PAI-1 to assess PAI-1 function on PMVECs proliferation. Our data showed that levels of PAI-1 expression in lung tissue of rats increased significantly when rats were treated with common bile duct ligation. We found that levels of miR-145-5p were frequently downregulated in HPS tissues and cell lines, and overexpression of miR-145-5p dramatically inhibited PMVECs proliferation. We further verified PAI-1 as a novel and direct target of miR-145-5p in HPS. MiR-145-5p inhibits PAI-1 synthesis and the expression changes of PAI-1 directly affect the proliferation of PMVECs. We concluded that miR-145-5p negatively regulates PMVEC proliferation through PAI-1 expression. In addition, overexpression of miR-145-5p may prove beneficial as a therapeutic strategy for HPS treatment. Summary: Our findings provide proof of principle that microRNAs may be useful for the future development of novel therapeutic strategies in HPS.
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Affiliation(s)
- Yang Chen
- Department of Anesthesia, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Congwen Yang
- Department of Anesthesia, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Yujie Li
- Department of Anesthesia, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Lin Chen
- Department of Anesthesia, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Yong Yang
- Department of Anesthesia, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Karine Belguise
- Laboratoire de Biologie Cellulaire et Moléculaire du Contrôle de la Prolifération (LBCMCP), Centre de Biologie Intégrative (CBI), Université de Toulouse, CNRS, Université Paul Sabatier (UPS), 31062 Toulouse, France
| | - Xiaobo Wang
- Laboratoire de Biologie Cellulaire et Moléculaire du Contrôle de la Prolifération (LBCMCP), Centre de Biologie Intégrative (CBI), Université de Toulouse, CNRS, Université Paul Sabatier (UPS), 31062 Toulouse, France
| | - Kaizhi Lu
- Department of Anesthesia, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Bin Yi
- Department of Anesthesia, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China
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7
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Yang M, Fan Z, Wang F, Tian ZH, Ma B, Dong B, Li Z, Zhang M, Zhao W. BMP-2 enhances the migration and proliferation of hypoxia-induced VSMCs via actin cytoskeleton, CD44 and matrix metalloproteinase linkage. Exp Cell Res 2018; 368:248-257. [DOI: 10.1016/j.yexcr.2018.05.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2017] [Revised: 05/03/2018] [Accepted: 05/06/2018] [Indexed: 12/24/2022]
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8
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Peerapen P, Chaiyarit S, Thongboonkerd V. Protein Network Analysis and Functional Studies of Calcium Oxalate Crystal-Induced Cytotoxicity in Renal Tubular Epithelial Cells. Proteomics 2018; 18:e1800008. [PMID: 29464862 DOI: 10.1002/pmic.201800008] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Revised: 02/02/2018] [Indexed: 12/20/2022]
Abstract
Our previous expression study has reported a set of proteins with altered levels in renal tubular cells after exposure to calcium oxalate monohydrate (COM) crystals, which are the main composition of kidney stones. However, their functional significance remained largely unknown. In this study, protein network analysis revealed that the significantly altered proteins induced by COM crystals were involved mainly in three main functional networks, including i) cell proliferation and wound healing; ii) oxidative stress and mitochondrial function; and iii) cellular junction complex and integrity. Cell proliferation and wound healing assays showed that the COM-treated cells had defective proliferation and tissue healing capability, respectively. Oxyblot analysis demonstrated accumulation of the oxidized proteins, whereas intracellular ATP level was significantly increased in the COM-treated cells. Additionally, level of zonula occludens-1 (ZO-1), a tight junction protein, was significantly decreased, consistent with the significant declines in transepithelial resistance (TER) and level of RhoA signaling molecule in the COM-treated cells. These findings indicate significant perturbations in mitochondrial and oxidative stress axis that cause defective cell proliferation, tissue healing capability, junctional protein complex, and cellular integrity of renal tubular epithelial cells exposed to COM crystals that may play important roles in kidney stone pathogenesis.
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Affiliation(s)
- Paleerath Peerapen
- Medical Proteomics Unit, Office for Research and Development, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Sakdithep Chaiyarit
- Medical Proteomics Unit, Office for Research and Development, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Visith Thongboonkerd
- Medical Proteomics Unit, Office for Research and Development, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
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9
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Endothelial cells cope with hypoxia-induced depletion of ATP via activation of cellular purine turnover and phosphotransfer networks. Biochim Biophys Acta Mol Basis Dis 2018. [PMID: 29514048 DOI: 10.1016/j.bbadis.2018.03.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Intravascular ATP and adenosine have emerged as important regulators of endothelial barrier function, vascular remodeling and neovascularization at various pathological states, including hypoxia, inflammation and oxidative stress. By using human umbilical vein endothelial cells (HUVEC) and bovine vasa vasorum endothelial cells (VVEC) as representatives of macro- and microvessel phenotypes, this study was undertaken to evaluate cellular mechanisms contributing to physiological adaptation of vascular endothelium to hypoxia, with a particular emphasis on ectoenzymatic purine-converting activities and their link to intracellular ATP homeostasis and signaling pathways. Nucleoside triphosphate diphosphohydrolase-1 (NTPDase1/CD39), ecto-5'-nucleotidase/CD73 and ecto-adenylate kinase activities were determined by thin-layer chromatography (TLC) with 3H-labelled nucleotide substrates. Exposure of HUVEC and VVEC to 1% O2 for 4-24 h triggered rather moderate activation of ATP breakdown into adenosine via the CD39-CD73 axis. Additional TLC analysis of salvage pathways revealed the enhanced ability of hypoxic HUVEC to convert cell-incorporated [3H]adenosine into [3H]ADP/ATP. Furthermore, following a period of hypoxia, HUVEC underwent concurrent changes in intracellular signaling manifested in the depletion of putative ATP stores and targeted up-regulation of phospho-p53, p70S6K/mTOR and other tyrosine kinases. The revealed complex implication of both extrinsic and intrinsic mechanisms into a tuned hypoxia-induced control of purine homeostasis and signaling may open up further research for the development of pharmacological treatments to improve endothelial cell function under disease conditions associated with a loss of cellular ATP during oxygen deprivation.
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10
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Li Y, Zhang Z, Zhou X, Li R, Cheng Y, Shang B, Han Y, Liu B, Xie X. Histone Deacetylase 1 Inhibition Protects Against Hypoxia-Induced Swelling in H9c2 Cardiomyocytes Through Regulating Cell Stiffness. Circ J 2017; 82:192-202. [PMID: 28747611 DOI: 10.1253/circj.cj-17-0022] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
BACKGROUND The process of cardiomyocyte swelling involves changes of biomechanical properties and profiles of cellular genes. Although many genes have been proved to regulate cell edema of cardiomyocyte, the mechanisms involved in this event, as well as the biomechanical properties of swelling cell, remain unknown.Methods and Results:Whether histone deacetylase 1 (HDAC1) inhibition protects against hypoxia-induced H9c2 cardiomyocyte swelling is examined in this study. Hypoxia-induced changes in the biomechanical properties and cytoskeletal structure that are relevant to cell swelling were also determined. H9c2 cells were treated under a chemical hypoxia situation (cobalt chloride) with HDAC1 inhibition (chemical inhibitor or siRNA) for 5 h, followed by in vitro biological and mechanical characterization. The results showed that expression of HDAC1 instead of HDAC4 was upregulated by chemical hypoxia. HDAC1 inhibition protects H9c2 cells against chemical hypoxia-induced hypoxic injury and cell swelling. HDAC1 inhibition improved cell viability, decreased lactate dehydrogenase leakage, cell apoptosis, malondialdehyde concentration, cell volume, and particles on the cell surface, and increased superoxide dismutase activity. Moreover, chemical hypoxia induced a decrease of Young's modulus, accompanied by alterations in the integrity of acetylated histone and organization of the cytoskeletal network. HDAC1 inhibition significantly reversed these processes. CONCLUSIONS Based on the ideal physical model, HDAC1 inhibition protects against hypoxia-induced swelling in H9c2 cardiomyocytes through enhancing cell stiffness. Overall, HDAC1 is a potential therapeutic target for myocardial edema.
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Affiliation(s)
- Yi Li
- The Institute of Medical Genetics, School of Basic Medical Sciences, Lanzhou University.,Gansu Cardiovascular Institute
| | - Zhengyi Zhang
- Cardiac Hospital, Lanzhou University Second Hospital
| | - Xiangnan Zhou
- School of Physics and Information Engineering, Shanxi Normal University
| | - Rui Li
- School of Stomatology, Lanzhou University
| | - Yan Cheng
- Experimental Center, Northwest University for Nationalities.,Department of Biochemistry and Medical Genetics, University of Manitoba
| | - Bo Shang
- Cardiac Hospital, Lanzhou University Second Hospital
| | - Yu Han
- College of Life Science & Technology, Huazhong University of Science & Technology
| | - Bin Liu
- School of Stomatology, Lanzhou University
| | - Xiaodong Xie
- The Institute of Medical Genetics, School of Basic Medical Sciences, Lanzhou University.,Gansu Cardiovascular Institute
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11
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Pierozan P, Pessoa-Pureur R. Cytoskeleton as a Target of Quinolinic Acid Neurotoxicity: Insight from Animal Models. Mol Neurobiol 2017. [PMID: 28647871 DOI: 10.1007/s12035-017-0654-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Cytoskeletal proteins are increasingly recognized as having important roles as a target of the action of different neurotoxins. In the last years, several works of our group have shown that quinolinic acid (QUIN) was able to disrupt the homeostasis of the cytoskeleton of neural cells and this was associated with cell dysfunction and neurodegeneration. QUIN is an excitotoxic metabolite of tryptophan metabolism and its accumulation is associated with several neurodegenerative diseases. In the present review, we provide a comprehensive view of the actions of QUIN upstream of glutamate receptors, eliciting kinase/phosphatase signaling cascades that disrupt the homeostasis of the phosphorylation system associated with intermediate filament proteins of astrocytes and neurons. We emphasize the critical role of calcium in these actions and the evidence that misregulated cytoskeleton takes part of the cell response to the injury resulting in neurodegeneration in different brain regions, disrupted cell signaling in acute tissue slices, and disorganized cytoskeleton with altered cell morphology in primary cultures. We also discuss the interplay among misregulated cytoskeleton, oxidative stress, and cell-cell contact through gap junctions mediating the quinolinic acid injury in rat brain. The increasing amount of cross talks identified between cytoskeletal proteins and cellular signaling cascades reinforces the exciting possibility that cytoskeleton could be a new target in the neurotoxicity of QUIN and further studies will be necessary to develop strategies to protect the cytoskeleton and counteracts the cytotoxicity of this metabolite.
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Affiliation(s)
- Paula Pierozan
- Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Rua Ramiro Barcelos 2600 Anexo, Porto Alegre, RS, 90035-003, Brazil
| | - Regina Pessoa-Pureur
- Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Rua Ramiro Barcelos 2600 Anexo, Porto Alegre, RS, 90035-003, Brazil.
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12
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Li R, Fang L, Pu Q, Lin P, Hoggarth A, Huang H, Li X, Li G, Wu M. Lyn prevents aberrant inflammatory responses to Pseudomonas infection in mammalian systems by repressing a SHIP-1-associated signaling cluster. Signal Transduct Target Ther 2016; 1:16032. [PMID: 29263906 PMCID: PMC5661651 DOI: 10.1038/sigtrans.2016.32] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2016] [Revised: 11/18/2016] [Accepted: 11/22/2016] [Indexed: 02/05/2023] Open
Abstract
The pleiotropic Src kinase Lyn has critical roles in host defense in alveolar macrophages against bacterial infection, but the underlying mechanism for Lyn-mediated inflammatory response remains largely elusive. Using mouse Pseudomonas aeruginosa infection models, we observed that Lyn-/- mice manifest severe lung injury and enhanced inflammatory responses, compared with wild-type littermates. We demonstrate that Lyn exerts this immune function through interaction with IL-6 receptor and cytoskeletal protein Ezrin via its SH2 and SH3 domains. Depletion of Lyn results in excessive STAT3 activation, and enhanced the Src homology 2-containing inositol-5-phopsphatase 1 (SHIP-1) expression. Deletion of SHIP-1 in Lyn-/- mice (double knockout) promotes mouse survival and reduces inflammatory responses during P. aeruginosa infection, revealing the rescue of the deadly infectious phenotype in Lyn deficiency. Mechanistically, loss of SHIP-1 reduces NF-κB-dependent cytokine production and dampens MAP kinase activation through a TLR4-independent PI3K/Akt pathway. These findings reveal Lyn as a regulator for host immune response against P. aeruginosa infection through SHIP-1 and IL-6/STAT3 signaling pathway in alveolar macrophages.
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Affiliation(s)
- Rongpeng Li
- Department of Biomedical Sciences, University of North Dakota, Grand Forks, North Dakota, USA.,Key Laboratory of Biotechnology for Medicinal Plants of Jiangsu Province, Jiangsu Normal University, Xuzhou, Jiangsu 221116, P.R., China
| | - Lizhu Fang
- Department of Biomedical Sciences, University of North Dakota, Grand Forks, North Dakota, USA
| | - Qinqin Pu
- Department of Biomedical Sciences, University of North Dakota, Grand Forks, North Dakota, USA.,State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, and Collaborative Innovation Center for Biotherapy, Chengdu, China
| | - Ping Lin
- Department of Biomedical Sciences, University of North Dakota, Grand Forks, North Dakota, USA
| | - Austin Hoggarth
- Department of Biomedical Sciences, University of North Dakota, Grand Forks, North Dakota, USA
| | - Huang Huang
- Department of Biomedical Sciences, University of North Dakota, Grand Forks, North Dakota, USA
| | - Xuefeng Li
- Department of Biomedical Sciences, University of North Dakota, Grand Forks, North Dakota, USA.,Institute of Human Virology, Sun Yat-sen University, Guangzhou, China
| | - Guoping Li
- Inflammation and Allergic Disease Research Unit, First Affiliated Hospital of Southwest Medical University, Luzhou, China
| | - Min Wu
- Department of Biomedical Sciences, University of North Dakota, Grand Forks, North Dakota, USA.,State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, and Collaborative Innovation Center for Biotherapy, Chengdu, China
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Tissue reaction to urogynecologic meshes: effect of steroid soaking in two different mesh models. Int Urogynecol J 2016; 27:1583-9. [PMID: 27038992 DOI: 10.1007/s00192-016-3013-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2015] [Accepted: 03/14/2016] [Indexed: 12/23/2022]
Abstract
INTRODUCTION AND HYPOTHESIS Steroid soaking may decrease mesh-triggered inflammatory reaction in tissue. We aimed to investigate the tissue reaction to a steroid-soaked mesh material and an unsoaked mesh material in the rat model. METHODS Neutral and steroid-soaked type I macroporous polypropylene (PP) monofilament and polyvinylidene fluoride (PVF) mesh materials were implanted on the rectus abdominis muscle of 20 mature Wistar albino rats. Animals were divided into four groups: PP mesh with steroid (PP-S), PP mesh without steroid, PVF mesh with steroid (PVF-S), and PVF mesh without steroid. The rats were killed after 12 weeks, and histologic, immunohistochemical and electron microscopic examinations were performed. For immunohistochemical analysis, polyclonal rabbit anti-mouse CD3, rabbit anti-mouse CD68, rabbit anti-mouse CD15, and rabbit anti-mouse CD34 antibodies were used for the detection of lymphocytes, macrophages, polymorphonuclear leukocyte foreign body giant cells, and fibromyocyte stem cells, respectively. Samples were stained with hematoxylin and eosin for the histologic evaluation of inflammation and with Masson's trichrome stain for the evaluation of collagen deposition. Pore size and mesh ultrastructure were evaluated by electron microscopy. RESULTS Expression of CD3 was lower in the PVF, PVF-S and PP-S groups, and expression of CD34 was higher in the PVF-S and PP-S groups than in the PP groups (p < 0.05). Collagen deposition was lower in the PVF, PVF-S and PP-S groups (p < 0.05). Histologically, the intensity of inflammation was lower in the PVF-S and PP-S groups than in the PP mesh group (p < 0.05). There were no significant differences among the groups in terms of pore size and mesh ultrastructure on electron microscopic examination (p > 0.05). CONCLUSIONS PVF mesh induces less inflammation than PP mesh, and in both mesh types steroid soaking further decreases inflammation without changing the pore size.
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