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Wisniewski É, Czárán D, Kovács F, Bahurek E, Németh A, Sasvári P, Szanda G, Pettkó-Szandtner A, Klement E, Ligeti E, Csépányi-Kömi R. A novel BRET-Based GAP assay reveals phosphorylation-dependent regulation of the RAC-specific GTPase activating protein ARHGAP25. FASEB J 2022; 36:e22584. [PMID: 36190314 DOI: 10.1096/fj.202200689r] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Revised: 09/07/2022] [Accepted: 09/20/2022] [Indexed: 11/11/2022]
Abstract
ARHGAP25, a RAC-specific GTPase activating protein (GAP), is an essential regulator of phagocyte effector functions such as phagocytosis, superoxide production, and transendothelial migration. Furthermore, its complex role in tumor behavior has recently been recognized. We previously demonstrated that phosphorylation of serine 363 in ARHGAP25 regulates hematopoietic stem cells and progenitor cells in mouse bone marrow. However, the significance of other potential phosphorylation sites of ARHGAP25 remained unknown. Now, we developed a novel, real-time bioluminescence resonance energy transfer (BRET) assay to monitor the GAP activity of ARHGAP25 in vitro. Using this approach, we revealed that phosphorylation of S363 and S488, but not that of S379-380, controls ARHGAP25's RACGAP activity. On the other hand, we found in granulocyte-differentiated human PLB-985 cells that superoxide production and actin depolymerization are regulated by residues S363 and S379-380. The present data demonstrate the value of our BRET-GAP assay and show that different phosphorylation patterns regulate ARHGAP25's GAP activity and its effect on superoxide production and phagocytosis.
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Affiliation(s)
- Éva Wisniewski
- Department of Physiology, Semmelweis University, Budapest, Hungary
| | - Domonkos Czárán
- Department of Physiology, Semmelweis University, Budapest, Hungary
| | - Fanni Kovács
- Department of Physiology, Semmelweis University, Budapest, Hungary
| | - Enikő Bahurek
- Department of Physiology, Semmelweis University, Budapest, Hungary
| | - Afrodité Németh
- Department of Physiology, Semmelweis University, Budapest, Hungary
| | - Péter Sasvári
- Department of Physiology, Semmelweis University, Budapest, Hungary
| | - Gergő Szanda
- Department of Physiology, Semmelweis University, Budapest, Hungary
| | | | - Eva Klement
- Laboratory of Proteomics Research, Biological Research Centre, Szeged, Hungary.,Single Cell Omics ACF, Hungarian Centre of Excellence for Molecular Medicine, Szeged, Hungary
| | - Erzsébet Ligeti
- Department of Physiology, Semmelweis University, Budapest, Hungary
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2
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Allam VSRR, Paudel KR, Gupta G, Singh SK, Vishwas S, Gulati M, Gupta S, Chaitanya MVNL, Jha NK, Gupta PK, Patel VK, Liu G, Kamal MA, Hansbro PM, Oliver BGG, Chellappan DK, Dua K. Nutraceuticals and mitochondrial oxidative stress: bridging the gap in the management of bronchial asthma. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:62733-62754. [PMID: 35796922 PMCID: PMC9477936 DOI: 10.1007/s11356-022-21454-w] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Accepted: 06/10/2022] [Indexed: 02/05/2023]
Abstract
Asthma is a chronic inflammatory disease primarily characterized by inflammation and reversible bronchoconstriction. It is currently one of the leading causes of morbidity and mortality in the world. Oxidative stress further complicates the pathology of the disease. The current treatment strategies for asthma mainly involve the use of anti-inflammatory agents and bronchodilators. However, long-term usage of such medications is associated with severe adverse effects and complications. Hence, there is an urgent need to develop newer, novel, and safe treatment modalities for the management of asthma. This has therefore prompted further investigations and detailed research to identify and develop novel therapeutic interventions from potent untapped resources. This review focuses on the significance of oxidative stressors that are primarily derived from both mitochondrial and non-mitochondrial sources in initiating the clinical features of asthma. The review also discusses the biological scavenging system of the body and factors that may lead to its malfunction which could result in altered states. Furthermore, the review provides a detailed insight into the therapeutic role of nutraceuticals as an effective strategy to attenuate the deleterious effects of oxidative stress and may be used in the mitigation of the cardinal features of bronchial asthma.
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Affiliation(s)
| | - Keshav Raj Paudel
- Centre for Inflammation, Centenary Institute and University of Technology Sydney, School of Life Sciences, Faculty of Science, Sydney, NSW, 2007, Australia
| | - Gaurav Gupta
- School of Pharmacy, Suresh Gyan Vihar University, Jagatpura, Jaipur, India
- Department of Pharmacology, Saveetha Dental College, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, India
- Uttaranchal Institute of Pharmaceutical Sciences, Uttaranchal University, Dehradun, India
| | - Sachin Kumar Singh
- School of Pharmaceutical Sciences, Lovely Professional University, Phagwara, Punjab, India
- Discipline of Pharmacy, Graduate School of Health, University of Technology Sydney, P.O. Box: 123 Broadway, Ultimo, NSW, 2007, Australia
| | - Sukriti Vishwas
- School of Pharmaceutical Sciences, Lovely Professional University, Phagwara, Punjab, India
| | - Monica Gulati
- School of Pharmaceutical Sciences, Lovely Professional University, Phagwara, Punjab, India
- Discipline of Pharmacy, Graduate School of Health, University of Technology Sydney, P.O. Box: 123 Broadway, Ultimo, NSW, 2007, Australia
| | - Saurabh Gupta
- Chitkara College of Pharmacy, Chitkara University, Punjab, India
| | | | - Niraj Kumar Jha
- Department of Biotechnology, School of Engineering & Technology (SET), Sharda University, Greater Noida, Uttar Pradesh, India
- Department of Biotechnology, School of Applied & Life Sciences (SALS), Uttaranchal University, Dehradun, 248007, India
| | - Piyush Kumar Gupta
- Department of Life Sciences, School of Basic Sciences and Research (SBSR), Sharda University, Greater Noida, Uttar Pradesh, Australia
| | - Vyoma K Patel
- School of Clinical Medicine, Faculty of Medicine and Health, University of New South Wales, Sydney, NSW, 2052, Australia
- Faculty of Health, Australian Research Centre in Complementary and Integrative Medicine, University of Technology Sydney, Ultimo, NSW, 2007, Australia
| | - Gang Liu
- Centre for Inflammation, Centenary Institute and University of Technology Sydney, School of Life Sciences, Faculty of Science, Sydney, NSW, 2007, Australia
| | - Mohammad Amjad Kamal
- King Fahd Medical Research Center, King Abdulaziz University, P. O. Box 80216, Jeddah, 21589, Saudi Arabia
- Institutes for Systems Genetics, Frontiers Science Center for Disease related Molecular Network, West China Hospital, Sichuan University, Chengdu, China
- Enzymoics, Novel Global Community Educational Foundation, 7 Peterlee Place, Hebersham, NSW, 2770, Australia
- Department of Pharmacy, Faculty of Allied Health Sciences, Daffodil International University, Dhaka, 1207, Bangladesh
| | - Philip M Hansbro
- Centre for Inflammation, Centenary Institute and University of Technology Sydney, School of Life Sciences, Faculty of Science, Sydney, NSW, 2007, Australia
| | - Brian Gregory George Oliver
- School of Life Sciences, Faculty of Science, University of Technology Sydney, Ultimo, NSW, Australia
- Woolcock Institute of Medical Research, University of Sydney, Sydney, NSW, Australia
| | - Dinesh Kumar Chellappan
- Department of Life Sciences, School of Pharmacy, International Medical University, Bukit Jalil, Kuala Lumpur, 57000, Malaysia
| | - Kamal Dua
- Woolcock Institute of Medical Research, University of Sydney, Sydney, NSW, Australia.
- Discipline of Pharmacy, Graduate School of Health, University of Technology Sydney, P.O. Box: 123 Broadway, Ultimo, NSW, 2007, Australia.
- Faculty of Health, Australian Research Centre in Complementary and Integrative Medicine, University of Technology Sydney, Ultimo, NSW, 2007, Australia.
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3
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Song Z, Hudik E, Le Bars R, Roux B, Dang PMC, El Benna J, Nüsse O, Dupré-Crochet S. Class I phosphoinositide 3-kinases control sustained NADPH oxidase activation in adherent neutrophils. Biochem Pharmacol 2020; 178:114088. [PMID: 32531347 DOI: 10.1016/j.bcp.2020.114088] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Revised: 06/04/2020] [Accepted: 06/05/2020] [Indexed: 12/21/2022]
Abstract
Phagocytes, especially neutrophils, can produce reactive oxygen species (ROS), through the activation of the NADPH oxidase (NOX2). Although this enzyme is crucial for host-pathogen defense, ROS production by neutrophils can be harmful in several pathologies such as cardiovascular diseases or chronic pulmonary diseases. The ROS production by NOX2 involves the assembly of the cytosolic subunits (p67phox, p47phox, and p40phox) and Rac with the membrane subunits (gp91phox and p22phox). Many studies are devoted to the activation of NOX2. However, the mechanisms that cause NADPH oxidase deactivation and thus terminate ROS production are not well known. Here we investigated the ability of class I phosphoinositide 3-kinases (PI3Ks) to sustain NADPH oxidase activation. The NADPH oxidase activation was triggered by seeding neutrophil-like PLB-985 cells, or human neutrophils on immobilized fibrinogen. Adhesion of the neutrophils, mediated by β2 integrins, induced activation of the NADPH oxidase and translocation of the cytosolic subunits at the plasma membrane. Inhibition of class I PI3Ks, and especially PI3Kβ, terminated ROS production. This deactivation of NOX2 is due to the release of the cytosolic subunits, p67phox and p47phox from the plasma membrane. Overexpression of an active form of Rac 1 did not prevent the drop of ROS production upon inhibition of class I PI3Ks. Moreover, the phosphorylation of p47phox at S328, a potential target of kinases activated by the PI3K pathway, was unchanged. Our results indicate that the experimental downregulation of class I PI3K products triggers the plasma membrane NADPH oxidase deactivation. Release of p47phox from the plasma membrane may involve its PX domains that bind PI3K products.
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Affiliation(s)
- Zhimin Song
- Université Paris-Saclay, CNRS UMR 8000, Institut de Chimie Physique, 91405 Orsay, France
| | - Elodie Hudik
- Université Paris-Saclay, CNRS UMR 8000, Institut de Chimie Physique, 91405 Orsay, France
| | - Romain Le Bars
- Light microscopy core facility, Imagerie-Gif, Institut de Biologie Intégrative de la Cellule (I2BC), CEA, CNRS, Université Paris-Saclay, 91198 Gif-sur-Yvette, France
| | - Blandine Roux
- Université Paris-Saclay, CNRS UMR 8000, Institut de Chimie Physique, 91405 Orsay, France
| | - Pham My-Chan Dang
- Université de Paris, Centre de Recherche sur l'Inflammation (CRI), Inserm, UMR 1149, CNRS, ERL8252, Laboratoire d'Excellence Inflamex, Faculté de Médecine Xavier Bichat, F-75018 Paris, France
| | - Jamel El Benna
- Université de Paris, Centre de Recherche sur l'Inflammation (CRI), Inserm, UMR 1149, CNRS, ERL8252, Laboratoire d'Excellence Inflamex, Faculté de Médecine Xavier Bichat, F-75018 Paris, France
| | - Oliver Nüsse
- Université Paris-Saclay, CNRS UMR 8000, Institut de Chimie Physique, 91405 Orsay, France
| | - Sophie Dupré-Crochet
- Université Paris-Saclay, CNRS UMR 8000, Institut de Chimie Physique, 91405 Orsay, France.
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Liu Y, Zhang Z, Li Q, Zhang L, Cheng Y, Zhong Z. Mitochondrial APE1 promotes cisplatin resistance by downregulating ROS in osteosarcoma. Oncol Rep 2020; 44:499-508. [PMID: 32627008 PMCID: PMC7336412 DOI: 10.3892/or.2020.7633] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2019] [Accepted: 04/22/2020] [Indexed: 01/20/2023] Open
Abstract
Apurinic/apyrimidinic endonuclease 1 (APE1) is a primary nuclear-localized multifunctional protein in osteosarcoma. However, the cytoplasmic localization of APE1 was found to be functional and to increase with cisplatin resistance, yet the molecular mechanism is unknown. In the present study, we explored the cisplatin resistance mechanism in osteosarcoma from the new perspective of APE1 extranuclear biological activity. Using cisplatin-resistant and cisplatin-sensitive osteosarcoma cell lines, we found that mitochondrial APE1 (mtAPE1) was overexpressed in cisplatin-resistant cells but not in sensitive cells. Overexpression of mtAPE1 reduced cisplatin-induced apoptosis, while knockdown of APE1 reversed this phenomenon and caused oxidative DNA damage via overproduction of reactive oxygen species (ROS). We further demonstrated that high mtAPE1 expression could downregulate ROS production by decreasing the phosphorylation of Rac1 (p-Rac1), further promoting cisplatin resistance in osteosarcoma. Our findings suggest that mitochondrial APE1 promotes cisplatin resistance by decreasing ROS generation, which may provide new ideas for researching the molecular mechanism of osteosarcoma chemoresistance and strategies to overcome cisplatin resistance in osteosarcoma.
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Affiliation(s)
- Yufeng Liu
- Cancer Center, Daping Hospital, Army Medical University (Third Military Medical University), Chongqing 400038, P.R. China
| | - Zhimin Zhang
- Cancer Center, Daping Hospital, Army Medical University (Third Military Medical University), Chongqing 400038, P.R. China
| | - Qing Li
- Cancer Center, Daping Hospital, Army Medical University (Third Military Medical University), Chongqing 400038, P.R. China
| | - Liang Zhang
- Cancer Center, Daping Hospital, Army Medical University (Third Military Medical University), Chongqing 400038, P.R. China
| | - Yi Cheng
- Cancer Center, Daping Hospital, Army Medical University (Third Military Medical University), Chongqing 400038, P.R. China
| | - Zhaoyang Zhong
- Cancer Center, Daping Hospital, Army Medical University (Third Military Medical University), Chongqing 400038, P.R. China
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Xu K, Liu B, Ma Y. The tumor suppressive roles of ARHGAP25 in lung cancer cells. Onco Targets Ther 2019; 12:6699-6710. [PMID: 31692494 PMCID: PMC6707938 DOI: 10.2147/ott.s207540] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Accepted: 06/19/2019] [Indexed: 12/16/2022] Open
Abstract
Aim Several Rho GTPase-activating proteins (Rho GAPs) have been proved to serve as tumor suppressors in diverse human cancers. Among them, ARHGAP25 has also been found to be associated with hematopoietic cells and regulate phagocytosis. Little is known about the role of ARHGAP25 in lung cancer cells. Methods Quantitative real-time PCR and Western blot were used to measure the expression levels of ARHGAP25. The ability of cell growth and mobility were measured by cell proliferation and Transwell assays. Chromatin immunoprecipitation and luciferase assay were conducted to identify the transcriptional regulation. Results Lung cancer tissues had much lower expression level of ARHGAP25 compared to non-cancerous specimens as well as for lung cancer cells. Cell growth and mobility were strongly reduced when ARHGAP25 was overexpressed. Further, significantly negative correlation between ARHGAP25 expression and Wnt signaling pathway was observed. Overexpression of ARHGAP25 reduced the expression of β-catenin and matrix metalloproteinase-7. ARHGAP25 knockdown effect of increased abilities of cell proliferation, migration and invasion could be reversed by adding XAV939 inhibitor. The promoter site of ARHGAP25 could be bound with HOXA4. HOXA4 could regulate the transcriptional activity of ARHGAP25. Conclusions This study suggests that ARHGAP25 may inhibit lung cancer cell growth, migration and invasion through Wnt/β-catenin signaling pathway and its transcriptional activity can be regulated by HOXA4.
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Affiliation(s)
- Ke Xu
- Department of Thoracic Surgery, Cancer Hospital of China Medical University, Liaoning Cancer Hospital and Institute, Shenyang, Liaoning Province, People's Republic of China
| | - Bin Liu
- Department of Medical Oncology, Cancer Hospital of China Medical University, Liaoning Cancer Hospital and Institute, Shenyang, Liaoning Province, People's Republic of China
| | - Yegang Ma
- Department of Thoracic Surgery, Cancer Hospital of China Medical University, Liaoning Cancer Hospital and Institute, Shenyang, Liaoning Province, People's Republic of China
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Csépányi-Kömi R, Pásztor M, Bartos B, Ligeti E. The neglected terminators: Rho family GAPs in neutrophils. Eur J Clin Invest 2018; 48 Suppl 2:e12993. [PMID: 29972685 DOI: 10.1111/eci.12993] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/21/2017] [Accepted: 07/02/2018] [Indexed: 12/13/2022]
Abstract
BACKGROUND GTPase-activating proteins (GAPs) accelerate the rate of hydrolysis of GTP bound to small GTPases, thereby limiting the prevalence and concentration of the active, GTP-bound form of these proteins. The large number of potential GAPs acting on members of the Rho family of small GTPases raises the question of specificity or redundancy. RESULTS In this review, we summarize experimental data obtained on the role of Rho family GAPs in neutrophils, highlight cases where more than one GAP is involved in a physiological function and show examples that GAPs can be involved not only in termination but also in initiation of cellular processes. We demonstrate that the expression-level regulation of GAPs may also occur in short-living cells such as neutrophils. Finally, we provide insight into the existence and structure of molecular complexes in which Rho family GAPs are involved. CONCLUSION GAPs play more complex and varied roles than being simple terminators of cellular processes.
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Affiliation(s)
| | - Máté Pásztor
- Department of Physiology, Semmelweis University, Budapest, Hungary
| | - Balázs Bartos
- Department of Physiology, Semmelweis University, Budapest, Hungary
| | - Erzsébet Ligeti
- Department of Physiology, Semmelweis University, Budapest, Hungary
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Jiang D, Chen Y, Zhu Y, Fu G, Xu S. Expression of key enzymes in the mevalonate pathway are altered in monocrotaline-induced pulmonary arterial hypertension in rats. Mol Med Rep 2017; 16:9593-9600. [PMID: 29039598 DOI: 10.3892/mmr.2017.7798] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2017] [Accepted: 08/31/2017] [Indexed: 11/06/2022] Open
Abstract
Pulmonary arterial hypertension (PAH) is a serious pulmonary vascular disease. The changes in the structure, function and metabolism of endothelial cells are some of the important features of PAH. Previous studies have demonstrated that the mevalonate pathway is important in cardiovascular remodeling. However, whether the mevalonate pathway is involved in the development of PAH remains to be elucidated. The present study aimed to investigate the expression pattern of mevalonate pathway-related enzymes in monocrotaline (MCT)-induced PAH. F344 rats were randomly divided into two groups (n=6/group): Control group rats were injected with a single dose of saline, and MCT group rats were injected with a single dose of MCT (60 mg/kg). After 4 weeks, the right ventricular systolic pressure (RVSP) was measured, and lung and pulmonary artery tissue samples were collected. It was demonstrated that the RVSP increased and pulmonary vascular remodeling was detected in the PAH group. The expression levels of the enzymes farnesyldiphosphate synthase farnesyltransferase α and geranylgeranyltransferase type I increased in the PAH group, which suggested that the mevalonate pathway may be involved in the pathological development of PAH.
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Affiliation(s)
- Dongmei Jiang
- Department of Cardiology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang 310016, P.R. China
| | - Yu Chen
- Institute of Translational Medicine, School of Medicine, Zhejiang University, Hangzhou, Zhejiang 310029, P.R. China
| | - Yuxiang Zhu
- Institute of Translational Medicine, School of Medicine, Zhejiang University, Hangzhou, Zhejiang 310029, P.R. China
| | - Guosheng Fu
- Department of Cardiology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang 310016, P.R. China
| | - Shiming Xu
- Department of Cardiology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang 310016, P.R. China
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Nayernia Z, Colaianna M, Robledinos-Antón N, Gutzwiller E, Sloan-Béna F, Stathaki E, Hibaoui Y, Cuadrado A, Hescheler J, Stasia MJ, Saric T, Jaquet V, Krause KH. Decreased neural precursor cell pool in NADPH oxidase 2-deficiency: From mouse brain to neural differentiation of patient derived iPSC. Redox Biol 2017; 13:82-93. [PMID: 28575744 PMCID: PMC5454143 DOI: 10.1016/j.redox.2017.04.026] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2017] [Revised: 04/19/2017] [Accepted: 04/20/2017] [Indexed: 10/28/2022] Open
Abstract
There is emerging evidence for the involvement of reactive oxygen species (ROS) in the regulation of stem cells and cellular differentiation. Absence of the ROS-generating NADPH oxidase NOX2 in chronic granulomatous disease (CGD) patients, predominantly manifests as immune deficiency, but has also been associated with decreased cognition. Here, we investigate the role of NOX enzymes in neuronal homeostasis in adult mouse brain and in neural cells derived from human induced pluripotent stem cells (iPSC). High levels of NOX2 were found in mouse adult neurogenic regions. In NOX2-deficient mice, neurogenic regions showed diminished redox modifications, as well as decrease in neuroprecursor numbers and in expression of genes involved in neural differentiation including NES, BDNF and OTX2. iPSC from healthy subjects and patients with CGD were used to study the role of NOX2 in human in vitro neuronal development. Expression of NOX2 was low in undifferentiated iPSC, upregulated upon neural induction, and disappeared during neuronal differentiation. In human neurospheres, NOX2 protein and ROS generation were polarized within the inner cell layer of rosette structures. NOX2 deficiency in CGD-iPSCs resulted in an abnormal neural induction in vitro, as revealed by a reduced expression of neuroprogenitor markers (NES, BDNF, OTX2, NRSF/REST), and a decreased generation of mature neurons. Vector-mediated NOX2 expression in NOX2-deficient iPSCs rescued neurogenesis. Taken together, our study provides novel evidence for a regulatory role of NOX2 during early stages of neurogenesis in mouse and human.
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Affiliation(s)
- Zeynab Nayernia
- Department of Pathology and Immunology, University of Geneva Medical School, 1-rue Michel Servet, 1211 Geneva, Switzerland
| | - Marilena Colaianna
- Department of Pathology and Immunology, University of Geneva Medical School, 1-rue Michel Servet, 1211 Geneva, Switzerland
| | - Natalia Robledinos-Antón
- Instituto de Investigaciones Biomédicas "Alberto Sols", Faculty of Medicine, Autonomous University of Madrid (UAM), Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
| | - Eveline Gutzwiller
- Department of Pathology and Immunology, University of Geneva Medical School, 1-rue Michel Servet, 1211 Geneva, Switzerland
| | - Frédérique Sloan-Béna
- Hôpitaux Universitaires de Genève HUG, Laboratoires de Cytogénétique Constitutionnelle, Service de Médecine Génétique, Geneva, Switzerland
| | - Elisavet Stathaki
- Hôpitaux Universitaires de Genève HUG, Laboratoires de Cytogénétique Constitutionnelle, Service de Médecine Génétique, Geneva, Switzerland
| | - Yousef Hibaoui
- Department of Genetic Medicine and Development, University of Geneva Medical School, 1 rue Michel Servet, 1211 Geneva, Switzerland
| | - Antonio Cuadrado
- Instituto de Investigaciones Biomédicas "Alberto Sols", Faculty of Medicine, Autonomous University of Madrid (UAM), Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
| | - Jürgen Hescheler
- Center for Physiology and Pathophysiology, Institute for Neurophysiology, Medical Faculty, University of Cologne, Cologne 50931, Germany
| | - Marie-José Stasia
- Université Grenoble Alpes, Techniques de l'Ingénierie Médicale et de la Complexité- Grenoble, F38000 Grenoble, France
| | - Tomo Saric
- Center for Physiology and Pathophysiology, Institute for Neurophysiology, Medical Faculty, University of Cologne, Cologne 50931, Germany
| | - Vincent Jaquet
- Department of Pathology and Immunology, University of Geneva Medical School, 1-rue Michel Servet, 1211 Geneva, Switzerland
| | - Karl-Heinz Krause
- Department of Pathology and Immunology, University of Geneva Medical School, 1-rue Michel Servet, 1211 Geneva, Switzerland.
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Morikis VA, Radecke C, Jiang Y, Heinrich V, Curry FR, Simon SI. Atrial natriuretic peptide down-regulates neutrophil recruitment on inflamed endothelium by reducing cell deformability and resistance to detachment force. Biorheology 2016; 52:447-63. [PMID: 26639357 DOI: 10.3233/bir-15067] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
BACKGROUND Recombinant atrial natriuretic peptide (ANP) is administered in patients with acute heart failure in Japan to improve renal function and hemodynamics, but its anti-inflammatory effect on activated leukocytes may also contribute to its therapeutic efficacy. OBJECTIVE Examine unconventional role of ANP in neutrophil adhesion to inflamed endothelium. METHODS Human neutrophils were perfused over endothelial monolayers in a microfluidic lab-chip assay. Cell rheology was assessed by micropipette aspiration to assess changes in cortical tension and viscosity. Fluorescence microscopy was applied to measure adhesive contact area and β2-integrin focal bond formation. RESULTS ANP inhibited neutrophil rolling and firm adhesion without influencing the upregulation of cellular adhesion molecules on endothelium or the regulation of high affinity CD18 and shedding of L-selectin during neutrophil activation. Exposed to fluid shear, integrin mediated arrest was disrupted with ANP treatment, which elicited formation of long tethers and diminished cell spreading and contact. This correlated with a ∼40% increase in neutrophil viscosity and a reduction in the adhesive footprint. CONCLUSIONS A decrease in cell deformation and neutrophil flattening with ANP results in fewer integrin bond clusters, which translates to higher tensile forces and impaired adhesion strengthening and cell detachment.
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Affiliation(s)
- Vasilios A Morikis
- Department of Biomedical Engineering, University of California, Davis, CA 95616, USA
| | - Chris Radecke
- Department of Biomedical Engineering, University of California, Davis, CA 95616, USA
| | - Yanyan Jiang
- Department of Biomedical Engineering, University of California, Davis, CA 95616, USA
| | - Volkmar Heinrich
- Department of Biomedical Engineering, University of California, Davis, CA 95616, USA
| | - Fitz-Roy Curry
- Department of Biomedical Engineering, University of California, Davis, CA 95616, USA.,Department of Physiology and Membrane Biology, School of Medicine, University of California, Davis, CA 95616, USA
| | - Scott I Simon
- Department of Biomedical Engineering, University of California, Davis, CA 95616, USA
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10
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Small GTPases and their guanine-nucleotide exchange factors and GTPase-activating proteins in neutrophil recruitment. Curr Opin Hematol 2016; 23:44-54. [PMID: 26619317 DOI: 10.1097/moh.0000000000000199] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
PURPOSE OF REVIEW The review describes the roles of Rho- and Rap-guanosine triphosphatases (GTPases) and of their activators, guanine-nucleotide exchange factors (GEFs), and inhibitors, GTPase activating proteins (GAPs), in neutrophil recruitment from the blood stream into inflamed tissues, with a focus on recently identified roles in neutrophils, endothelial cells, and platelets. RECENT FINDINGS Recent studies have identified important roles of Rho- and Rap-GTPases, and of their GEFs and GAPs, in the neutrophil recruitment cascade. These proteins control the upregulation and/or activation of adhesion molecules on the surface of neutrophils, endothelial cells, and platelets, and they alter cell/cell adhesion in the vascular endothelium. This enables the capture of neutrophils from the blood stream, their migration along and through the vessel wall, and their passage into the inflamed tissue. In particular, it has recently become clear that P-Rex and Vav family Rac-GEFs in platelets are crucial for neutrophil recruitment. SUMMARY These recent findings have contributed greatly to our understanding of the signalling pathways that control neutrophil recruitment to sites of inflammation and have opened up new avenues of research in this field.
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Csépányi-Kömi R, Wisniewski É, Bartos B, Lévai P, Németh T, Balázs B, Kurz ARM, Bierschenk S, Sperandio M, Ligeti E. Rac GTPase Activating Protein ARHGAP25 Regulates Leukocyte Transendothelial Migration in Mice. THE JOURNAL OF IMMUNOLOGY 2016; 197:2807-15. [PMID: 27566826 DOI: 10.4049/jimmunol.1502342] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2015] [Accepted: 07/21/2016] [Indexed: 12/31/2022]
Abstract
ARHGAP25 is a Rac-specific GTPase-activating protein that is expressed primarily in hematopoietic cells. The involvement of ARHGAP25 in regulating the recruitment of leukocytes to inflammatory sites was investigated in genetically modified mice. Using intravital microscopy, we show that Arhgap25 deficiency affects all steps of leukocyte recruitment with a predominant enhancement of transendothelial migration of neutrophilic granulocytes. Increased transmigration of Arhgap25-deficient leukocytes is demonstrated in inflamed cremaster muscle venules, in a peritonitis model, and in an in vitro chemotaxis assay. Using bone marrow chimeric mice lacking ARHGAP25 in the hematopoietic compartment, we show that enhanced migration in the absence of ARHGAP25 is due to defective leukocyte function. In search for potential mechanisms of ARHGAP25-regulated migration of neutrophils, we detected an increase in the amount of active, GTP-bound Rac and Rac-dependent cytoskeletal changes in the absence of ARHGAP25, suggesting a critical role of ARHGAP25 in counterbalancing the Rac-activating effect of nucleotide exchange factors. Taken together, using Arhgap25-deficient mice, we identified ARHGAP25 as a relevant negative regulator of leukocyte transendothelial migration.
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Affiliation(s)
- Roland Csépányi-Kömi
- Department of Physiology, Semmelweis University, 1094 Budapest, Hungary; and Walter-Brendel-Zentrum für Experimentelle Medizin, Ludwig-Maximilians Universität, 80539 Munich, Germany
| | - Éva Wisniewski
- Department of Physiology, Semmelweis University, 1094 Budapest, Hungary; and
| | - Balázs Bartos
- Department of Physiology, Semmelweis University, 1094 Budapest, Hungary; and
| | - Petra Lévai
- Department of Physiology, Semmelweis University, 1094 Budapest, Hungary; and
| | - Tamás Németh
- Department of Physiology, Semmelweis University, 1094 Budapest, Hungary; and
| | - Bernadett Balázs
- Department of Physiology, Semmelweis University, 1094 Budapest, Hungary; and
| | - Angela R M Kurz
- Walter-Brendel-Zentrum für Experimentelle Medizin, Ludwig-Maximilians Universität, 80539 Munich, Germany
| | - Susanne Bierschenk
- Walter-Brendel-Zentrum für Experimentelle Medizin, Ludwig-Maximilians Universität, 80539 Munich, Germany
| | - Markus Sperandio
- Walter-Brendel-Zentrum für Experimentelle Medizin, Ludwig-Maximilians Universität, 80539 Munich, Germany
| | - Erzsébet Ligeti
- Department of Physiology, Semmelweis University, 1094 Budapest, Hungary; and
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Cell Death Inducing Microbial Protein Phosphatase Inhibitors--Mechanisms of Action. Mar Drugs 2015; 13:6505-20. [PMID: 26506362 PMCID: PMC4626703 DOI: 10.3390/md13106505] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2015] [Revised: 10/12/2015] [Accepted: 10/15/2015] [Indexed: 02/07/2023] Open
Abstract
Okadaic acid (OA) and microcystin (MC) as well as several other microbial toxins like nodularin and calyculinA are known as tumor promoters as well as inducers of apoptotic cell death. Their intracellular targets are the major serine/threonine protein phosphatases. This review summarizes mechanisms believed to be responsible for the death induction and tumor promotion with focus on the interdependent production of reactive oxygen species (ROS) and activation of Ca2+/calmodulin kinase II (CaM-KII). New data are presented using inhibitors of specific ROS producing enzymes to curb nodularin/MC-induced liver cell (hepatocyte) death. They indicate that enzymes of the arachidonic acid pathway, notably phospholipase A2, 5-lipoxygenase, and cyclooxygenases, may be required for nodularin/MC-induced (and presumably OA-induced) cell death, suggesting new ways to overcome at least some aspects of OA and MC toxicity.
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Brandes RP, Weissmann N, Schröder K. Nox family NADPH oxidases: Molecular mechanisms of activation. Free Radic Biol Med 2014; 76:208-26. [PMID: 25157786 DOI: 10.1016/j.freeradbiomed.2014.07.046] [Citation(s) in RCA: 489] [Impact Index Per Article: 48.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/17/2014] [Revised: 07/29/2014] [Accepted: 07/30/2014] [Indexed: 11/21/2022]
Abstract
NADPH oxidases of the Nox family are important enzymatic sources of reactive oxygen species (ROS). Numerous homologue-specific mechanisms control the activity of this enzyme family involving calcium, free fatty acids, protein-protein interactions, intracellular trafficking, and posttranslational modifications such as phosphorylation, acetylation, or sumoylation. After a brief review on the classic pathways of Nox activation, this article will focus on novel mechanisms of homologue-specific activity control and on cell-specific aspects which govern Nox activity. From these findings of the recent years it must be concluded that the activity control of Nox enzymes is much more complex than anticipated. Moreover, depending on the cellular activity state, Nox enzymes are selectively activated or inactivated. The complex upstream signaling aspects of these events make the development of "intelligent" Nox inhibitors plausible, which selectively attenuate disease-related Nox-mediated ROS formation without altering physiological signaling ROS. This approach might be of relevance for Nox-mediated tissue injury in ischemia-reperfusion and inflammation and also for chronic Nox overactivation as present in cancer initiation and cardiovascular disease.
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Affiliation(s)
- Ralf P Brandes
- Institut für Kardiovaskuläre Physiologie, Goethe-Universität Frankfurt, Frankfurt, Germany.
| | - Norbert Weissmann
- ECCPS, Justus-Liebig-Universität, Member of the DZL, Giessen, Germany
| | - Katrin Schröder
- Institut für Kardiovaskuläre Physiologie, Goethe-Universität Frankfurt, Frankfurt, Germany
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