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Tao L, Dou R, Chen X, Cao Y, Dai Z, Hu Z, Ma Z, Ge X, Zhang L, Wang X. Oroxyloside protects against dextran sulfate sodium-induced colitis by inhibiting ER stress via PPARγ activation. Chin J Nat Med 2024; 22:307-317. [PMID: 38658094 DOI: 10.1016/s1875-5364(24)60615-1] [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: 06/28/2023] [Indexed: 04/26/2024]
Abstract
Ulcerative colitis (UC), a prevalent form of inflammatory bowel disease (IBD), may result from immune system dysfunction, leading to the sustained overproduction of reactive oxygen species (ROS) and subsequent cellular oxidative stress damage. Recent studies have identified both peroxisome proliferator-activated receptor-γ (PPARγ) and endoplasmic reticulum (ER) stress as critical targets for the treatment of IBD. Oroxyloside (C22H20O11), derived from the root of Scutellariabaicalensis Georgi, has traditionally been used in treating inflammatory diseases. In this study, we investigated the molecular mechanisms by which oroxyloside mitigates dextran sulfate sodium (DSS)-induced colitis. We examined the effects of oroxyloside on ROS-mediated ER stress in colitis, including the protein expressions of GRP78, p-PERK, p-eIF2α, ATF4, and CHOP, which are associated with ER stress. The beneficial impact of oroxyloside was reversed by the PPARγ antagonist GW9662 (1 mg·kg-1, i.v.) in vivo. Furthermore, oroxyloside decreased pro-inflammatory cytokines and ROS production in both bone marrow-derived macrophages (BMDM) and the mouse macrophage cell line RAW 264.7. However, PPARγ siRNA transfection blocked the anti-inflammatory effect of oroxyloside and even abolished ROS generation and ER stress activation inhibited by oroxyloside in vitro. In conclusion, our study demonstrates that oroxyloside ameliorates DSS-induced colitis by inhibiting ER stress via PPARγ activation, suggesting that oroxyloside might be a promising effective agent for IBD.
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Affiliation(s)
- Lei Tao
- Nanjing Institute for Food and Drug Control, Nanjing 211198, China.
| | - Renjie Dou
- State Key Laboratory of Natural Medicines, School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, Nanjing 211198, China
| | - Xueming Chen
- State Key Laboratory of Natural Medicines, School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, Nanjing 211198, China
| | - Yu Cao
- Nanjing Institute for Food and Drug Control, Nanjing 211198, China
| | - Zhen Dai
- Nanjing Institute for Food and Drug Control, Nanjing 211198, China
| | - Ziyan Hu
- Nanjing Institute for Food and Drug Control, Nanjing 211198, China
| | - Zhi Ma
- Nanjing Institute for Food and Drug Control, Nanjing 211198, China
| | - Xiaoming Ge
- Nanjing Institute for Food and Drug Control, Nanjing 211198, China
| | - Ling Zhang
- Nanjing Institute for Food and Drug Control, Nanjing 211198, China
| | - Xiaoping Wang
- State Key Laboratory of Natural Medicines, School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, Nanjing 211198, China.
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2
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Sundqvist M, Christenson K, Wekell P, Björnsdottir H, Dahlstrand Rudin A, Sanchez Klose FP, Kallinich T, Welin A, Björkman L, Bylund J, Karlsson-Bengtsson A, Berg S. Severe chronic non-bacterial osteomyelitis in combination with total MPO deficiency and responsiveness to TNFα inhibition. Front Immunol 2023; 14:1233101. [PMID: 37954595 PMCID: PMC10637399 DOI: 10.3389/fimmu.2023.1233101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Accepted: 10/10/2023] [Indexed: 11/14/2023] Open
Abstract
We describe a female patient suffering from severe chronic non-bacterial osteomyelitis (CNO) with systemic inflammation and advanced malnutrition and complete deficiency of myeloperoxidase (MPO). CNO is a rare autoinflammatory bone disorder associated with dysregulation of the innate immune system. MPO deficiency is a genetic disorder with partial or complete absence of the phagocyte peroxidase MPO. MPO deficiency has no established clinical phenotype but reports indicate increased susceptibility to infection and chronic inflammation. The patient's symptoms began at 10 years of age with pain in the thighs, systemic inflammation and malnutrition. She was diagnosed with CNO at 14 years of age. Treatment with nonsteroidal anti-inflammatory drugs, corticosteroids, bisphosphonates or IL1-receptor antagonists (anakinra) did not relieve the symptoms. However, the patient responded instantly and recovered from her clinical symptoms when treated with TNFα blockade (adalimumab). Three years after treatment initiation adalimumab was withdrawn, resulting in rapid symptom recurrence. When reintroducing adalimumab, the patient promptly responded and went into remission. In addition to clinical and laboratory profiles, neutrophil functions (reactive oxygen species, ROS; neutrophil extracellular traps, NETs; degranulation; apoptosis; elastase activity) were investigated both in a highly inflammatory state (without treatment) and in remission (on treatment). At diagnosis, neither IL1β, IL6, nor TNFα was significantly elevated in serum, but since TNFα blockade terminated the inflammatory symptoms, the disease was likely TNFα-driven. All neutrophil parameters were normal both during treatment and treatment withdrawal, except for MPO-dependent intracellular ROS- and NET formation. The role of total MPO deficiency for disease etiology and severity is discussed.
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Affiliation(s)
- Martina Sundqvist
- Department of Rheumatology and Inflammation Research, Institute of Medicine, Sahlgrenska Academy University of Gothenburg, Gothenburg, Sweden
| | - Karin Christenson
- Department of Oral Microbiology and Immunology, Institute of Odontology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Per Wekell
- Department of Pediatrics, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
- Department of Pediatrics, NU Hospital Group, Uddevalla, Sweden
- Department of Pediatric Rheumatology and Immunology, Queen Silvia Children’s Hospital, Gothenburg, Sweden
| | - Halla Björnsdottir
- Department of Oral Microbiology and Immunology, Institute of Odontology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Agnes Dahlstrand Rudin
- Department of Oral Microbiology and Immunology, Institute of Odontology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Felix P. Sanchez Klose
- Department of Oral Microbiology and Immunology, Institute of Odontology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Tilmann Kallinich
- Department of Pediatric Pneumology, Immunology and Critical Care Medicine, Charité Universitätsmedizin Berlin, Deutsches Rheuma-Forschungszentrum (DRFZ), Institute of the Leibniz Association, Berlin, Germany
| | - Amanda Welin
- Department of Rheumatology and Inflammation Research, Institute of Medicine, Sahlgrenska Academy University of Gothenburg, Gothenburg, Sweden
- Division of Inflammation and Infection, Department of Biomedical and Clinical Sciences, Faculty of Medicine, Linköping University, Linköping, Sweden
| | - Lena Björkman
- Department of Rheumatology and Inflammation Research, Institute of Medicine, Sahlgrenska Academy University of Gothenburg, Gothenburg, Sweden
- Unit of Rheumatology, Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Johan Bylund
- Department of Oral Microbiology and Immunology, Institute of Odontology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Anna Karlsson-Bengtsson
- Department of Rheumatology and Inflammation Research, Institute of Medicine, Sahlgrenska Academy University of Gothenburg, Gothenburg, Sweden
- Division of Chemical Biology, Department of Life Sciences, Chalmers University of Technology, Gothenburg, Sweden
| | - Stefan Berg
- Department of Pediatrics, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
- Department of Pediatric Rheumatology and Immunology, Queen Silvia Children’s Hospital, Gothenburg, Sweden
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3
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Morozova DS, Martyanov AA, Obydennyi SI, Korobkin JJD, Sokolov AV, Shamova EV, Gorudko IV, Khoreva AL, Shcherbina A, Panteleev MA, Sveshnikova AN. Ex vivo observation of granulocyte activity during thrombus formation. BMC Biol 2022; 20:32. [PMID: 35125118 PMCID: PMC8819951 DOI: 10.1186/s12915-022-01238-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Accepted: 01/24/2022] [Indexed: 01/06/2023] Open
Abstract
Background The process of thrombus formation is thought to involve interactions between platelets and leukocytes. Leukocyte incorporation into growing thrombi has been well established in vivo, and a number of properties of platelet-leukocyte interactions critical for thrombus formation have been characterized in vitro in thromboinflammatory settings and have clinical relevance. Leukocyte activity can be impaired in distinct hereditary and acquired disorders of immunological nature, among which is Wiskott-Aldrich Syndrome (WAS). However, a more quantitative characterization of leukocyte behavior in thromboinflammatory conditions has been hampered by lack of approaches for its study ex vivo. Here, we aimed to develop an ex vivo model of thromboinflammation, and compared granulocyte behavior of WAS patients and healthy donors. Results Thrombus formation in anticoagulated whole blood from healthy volunteers and patients was visualized by fluorescent microscopy in parallel-plate flow chambers with fibrillar collagen type I coverslips. Moving granulocytes were observed in hirudinated or sodium citrate-recalcified blood under low wall shear rate conditions (100 s−1). These cells crawled around thrombi in a step-wise manner with an average velocity of 90–120 nm/s. Pre-incubation of blood with granulocyte priming agents lead to a significant decrease in mean-velocity of the cells and increase in the number of adherent cells. The leukocytes from patients with WAS demonstrated a 1.5-fold lower mean velocity, in line with their impaired actin polymerization. It is noteworthy that in an experimental setting where patients’ platelets were replaced with healthy donor’s platelets the granulocytes’ crawling velocity did not change, thus proving that WASP (WAS protein) deficiency causes disruption of granulocytes’ behavior. Thereby, the observed features of granulocytes crawling are consistent with the neutrophil chemotaxis phenomenon. As most of the crawling granulocytes carried procoagulant platelets teared from thrombi, we propose that the role of granulocytes in thrombus formation is that of platelet scavengers. Conclusions We have developed an ex vivo experimental model applicable for observation of granulocyte activity in thrombus formation. Using the proposed setting, we observed a reduction of motility of granulocytes of patients with WAS. We suggest that our ex vivo approach should be useful both for basic and for clinical research. Supplementary Information The online version contains supplementary material available at 10.1186/s12915-022-01238-x.
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Ren Y, Jiang W, Luo C, Zhang X, Huang M. Atractylenolide III Ameliorates TNBS-Induced Intestinal Inflammation in Mice by Reducing Oxidative Stress and Regulating Intestinal Flora. Chem Biodivers 2021; 18:e2001001. [PMID: 34156157 DOI: 10.1002/cbdv.202001001] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Accepted: 06/03/2021] [Indexed: 12/16/2022]
Abstract
The present study aimed to explore the therapeutic effects of the main active ingredients of Atractylodes macrocephala on the 2,4,6-trinitrobenzenesulfonic acid (TNBS)-induced mouse colitis model. TNBS-induced colitis was established in mice, which were treated with 8-β-Hydroxyasterolide (Atractylenolide III) for 14 days. The body weight of the mice in the middle and high dose groups of Atractylenolide III was increased compared with that of the model group. The disease activity index score was significantly reduced. The activity levels of myeloperoxidase were significantly decreased following increase in the dosage of Atractylenolide III, as determined by histological analysis. Moreover, Atractylenolide III downregulated the expression levels of the inflammatory factors interleukin-1β and tumor necrosis factor-α, and greatly suppressed the levels of the pro-oxidant markers, reactive oxygen species and malondialdehyde, while enhancing the expression levels of the antioxidant enzymes catalase, superoxide dismutase and glutathione peroxidase. The protein expression levels of formyl peptide receptor 1 (FPR1) and nuclear respiratory factor 2 (Nrf2) were upregulated in the colonic tissues of TNBS-treated mice. This effect was effectively reversed by Atractylenolide III treatment. In vivo studies indicated that TNBS alone induced a decrease in the abundance of lactobacilli and in the biodiversity of the colon. In conclusion, the present study suggested that Atractylenolide III attenuated TNBS-induced acute colitis by regulating oxidative stress via the FPR1 and Nrf2 pathways and by affecting the development of intestinal flora.
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Affiliation(s)
- Yan Ren
- College of Pharmaceutical Science, Guizhou University, Guiyang, 550025, P. R. China
| | - Wenwen Jiang
- College of Pharmaceutical Science, Guizhou University, Guiyang, 550025, P. R. China
| | - Chunli Luo
- College of Agriculture, Guizhou University, Guiyang, 550025, P. R. China
| | - Xiaohan Zhang
- College of Pharmaceutical Science, Guizhou University, Guiyang, 550025, P. R. China
| | - Mingjin Huang
- College of Agriculture, Guizhou University, Guiyang, 550025, P. R. China
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5
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Chang SN, Dey DK, Oh ST, Kong WH, Cho KH, Al-Olayan EM, Hwang BS, Kang SC, Park JG. Phorbol 12-Myristate 13-Acetate Induced Toxicity Study and the Role of Tangeretin in Abrogating HIF-1α-NF-κB Crosstalk In Vitro and In Vivo. Int J Mol Sci 2020; 21:E9261. [PMID: 33291656 PMCID: PMC7729754 DOI: 10.3390/ijms21239261] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Revised: 11/26/2020] [Accepted: 12/01/2020] [Indexed: 11/16/2022] Open
Abstract
Phorbol 12-myristate 13-acetate (PMA) is a potent tumor promoter and highly inflammatory in nature. Here, we investigated the toxic effects of PMA on different model system. PMA (10 μg) caused chromosomal aberrations on the Allium cepa root tip and induced mitotic dysfunction. Similarly, PMA caused embryonic and larval deformities and a plummeted survivability rate on zebrafish embryo in a dose-dependent manner. Persistently, PMA treatment on immortalized human keratinocyte human keratinocyte (HaCaT) cells caused massive inflammatory rush at 4 h and a drop in cell survivability at 24 h. Concomitantly, we replicated a cutaneous inflammation similar to human psoriasis induced by PMA. Herein, we used tangeretin (TAN), as an antagonist to counteract the inflammatory response. Results from an in vivo experiment indicated that TAN (10 and 30 mg/kg) significantly inhibited PMA stimulated epidermal hyperplasia and intra-epidermal neutrophilic abscesses. In addition, its treatment effectively neutralized PMA induced elevated reactive oxygen species (ROS) generation on in vitro and in vivo systems, promoting antioxidant response. The association of hypoxia-inducible factor 1-alpha (HIF-1α)-nuclear factor kappa-light-chain-enhancer of activated b cells (NF-κB) crosstalk triggered by PMA enhanced PKCα-ERK1/2-NF-κB pathway; its activation was also significantly counteracted after TAN treatment. Conclusively, we demonstrated TAN inhibited the nuclear translocation of HIF-1α and NF-κB p65. Collectively, TAN treatment ameliorated PMA incited malignant inflammatory response by remodeling the cutaneous microenvironment.
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Affiliation(s)
- Sukkum Ngullie Chang
- Department of Biotechnology, Daegu University, Gyeongsan 38453, Korea; (S.N.C.); (D.K.D.)
- Advanced Bio Convergence Center, Pohang Technopark Foundation, Pohang 37668, Gyeongbuk, Korea; (S.T.O.); (W.H.K.)
| | - Debasish Kumar Dey
- Department of Biotechnology, Daegu University, Gyeongsan 38453, Korea; (S.N.C.); (D.K.D.)
| | - Seong Taek Oh
- Advanced Bio Convergence Center, Pohang Technopark Foundation, Pohang 37668, Gyeongbuk, Korea; (S.T.O.); (W.H.K.)
- Okinawa Research Center Co. Ltd., 13-33, Suzaki, Uruma-si, Okinawa Ken 904-2234, Japan
| | - Won Ho Kong
- Advanced Bio Convergence Center, Pohang Technopark Foundation, Pohang 37668, Gyeongbuk, Korea; (S.T.O.); (W.H.K.)
| | - Kiu Hyung Cho
- Research Group, Gyeongbuk Institute for Bio Industry (GIB), Andong 36728, Korea;
| | - Ebtesam M. Al-Olayan
- Department of Zoology, Faculty of Science, King Saud University, Riyadh 11451, Saudi Arabia;
| | - Buyng Su Hwang
- Nakdonggang National Institute of Biological Resources, Sangju 37242, Korea;
| | - Sun Chul Kang
- Department of Biotechnology, Daegu University, Gyeongsan 38453, Korea; (S.N.C.); (D.K.D.)
| | - Jae Gyu Park
- Advanced Bio Convergence Center, Pohang Technopark Foundation, Pohang 37668, Gyeongbuk, Korea; (S.T.O.); (W.H.K.)
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Fahlberg MD, Blair RV, Doyle-Meyers LA, Midkiff CC, Zenere G, Russell-Lodrigue KE, Monjure CJ, Haupt EH, Penney TP, Lehmicke G, Threeton BM, Golden N, Datta PK, Roy CJ, Bohm RP, Maness NJ, Fischer T, Rappaport J, Vaccari M. Cellular events of acute, resolving or progressive COVID-19 in SARS-CoV-2 infected non-human primates. Nat Commun 2020; 11:6078. [PMID: 33247138 PMCID: PMC7695721 DOI: 10.1038/s41467-020-19967-4] [Citation(s) in RCA: 63] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Accepted: 11/03/2020] [Indexed: 01/08/2023] Open
Abstract
Understanding SARS-CoV-2 associated immune pathology is crucial to develop pan-effective vaccines and treatments. Here we investigate the immune events from the acute state up to four weeks post SARS-CoV-2 infection, in non-human primates (NHP) with heterogeneous pulmonary pathology. We show a robust migration of CD16 expressing monocytes to the lungs occurring during the acute phase, and we describe two subsets of interstitial macrophages (HLA-DR+CD206-): a transitional CD11c+CD16+ cell population directly associated with IL-6 levels in plasma, and a long-lasting CD11b+CD16+ cell population. Trafficking of monocytes is mediated by TARC (CCL17) and associates with viral load measured in bronchial brushes. We also describe associations between disease outcomes and high levels of cell infiltration in lungs including CD11b+CD16hi macrophages and CD11b+ neutrophils. Accumulation of macrophages is long-lasting and detectable even in animals with mild or no signs of disease. Interestingly, animals with anti-inflammatory responses including high IL-10:IL-6 and kynurenine to tryptophan ratios show less severe illness. Our results unravel cellular mechanisms of COVID-19 and suggest that NHP may be appropriate models to test immune therapies.
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Affiliation(s)
- M D Fahlberg
- Tulane National Primate Research Center, Covington, LA, USA
| | - R V Blair
- Tulane National Primate Research Center, Covington, LA, USA
- Department of Pathology and Laboratory Animal Medicine, Tulane University School of Medicine, New Orleans, LA, USA
| | - L A Doyle-Meyers
- Tulane National Primate Research Center, Covington, LA, USA
- Department of Medicine, Tulane University School of Medicine, New Orleans, LA, USA
| | - C C Midkiff
- Tulane National Primate Research Center, Covington, LA, USA
| | - G Zenere
- Tulane National Primate Research Center, Covington, LA, USA
| | - K E Russell-Lodrigue
- Tulane National Primate Research Center, Covington, LA, USA
- Department of Medicine, Tulane University School of Medicine, New Orleans, LA, USA
| | - C J Monjure
- Tulane National Primate Research Center, Covington, LA, USA
| | - E H Haupt
- Tulane National Primate Research Center, Covington, LA, USA
| | - T P Penney
- Tulane National Primate Research Center, Covington, LA, USA
| | - G Lehmicke
- Tulane National Primate Research Center, Covington, LA, USA
| | - B M Threeton
- Tulane National Primate Research Center, Covington, LA, USA
| | - N Golden
- Tulane National Primate Research Center, Covington, LA, USA
| | - P K Datta
- Tulane National Primate Research Center, Covington, LA, USA
- Department of Pathology and Laboratory Animal Medicine, Tulane University School of Medicine, New Orleans, LA, USA
| | - C J Roy
- Tulane National Primate Research Center, Covington, LA, USA
- Department of Microbiology and Immunology, Tulane University School of Medicine, New Orleans, LA, USA
| | - R P Bohm
- Tulane National Primate Research Center, Covington, LA, USA
- Department of Medicine, Tulane University School of Medicine, New Orleans, LA, USA
| | - N J Maness
- Tulane National Primate Research Center, Covington, LA, USA
- Department of Microbiology and Immunology, Tulane University School of Medicine, New Orleans, LA, USA
| | - T Fischer
- Tulane National Primate Research Center, Covington, LA, USA
- Department of Microbiology and Immunology, Tulane University School of Medicine, New Orleans, LA, USA
| | - J Rappaport
- Tulane National Primate Research Center, Covington, LA, USA
- Department of Microbiology and Immunology, Tulane University School of Medicine, New Orleans, LA, USA
| | - M Vaccari
- Tulane National Primate Research Center, Covington, LA, USA.
- Department of Microbiology and Immunology, Tulane University School of Medicine, New Orleans, LA, USA.
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Scandolara TB, da Silva JC, Malanowski J, de Oliveira JA, Rech D, Panis C. Anti-neutrophil antibodies (anti-MPO-ANCAs) are associated with poor prognosis in breast cancer patients. Immunobiology 2020; 225:152011. [PMID: 33130517 DOI: 10.1016/j.imbio.2020.152011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Revised: 08/20/2020] [Accepted: 08/31/2020] [Indexed: 12/29/2022]
Abstract
Anti-neutrophil antibodies are capable of activating neutrophils in sterile environments, releasing extracellular traps containing myeloperoxidase (MPO) and anti-MPO antibodies (MPO-ANCAs or anti-MPO-ANCAs), which have been implicated in the pathogenesis of several diseases. The present study evaluated systemic and tumor tissue levels of anti-MPO-ANCAs breast cancer patients, and its relation to clinicopathological characteristics. Anti-MPO-ANCAs were measured in serum and tissue samples of 150 patients by enzyme-linked immunoassay. Samples were pooled according to clinicopathological characteristics of patients. Higher anti-MPO-ANCAs levels were detected in groups presenting negative clinicopathological characteristics, such as high histological grade tumors and risk factors such as body mass index, menopausal status and early onset at diagnosis. The present data highlights anti-MPO-ANCAs as associated to poor prognosis in breast cancer, a role beyond its actually discussed role in autoimmunity and vasculitis.
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Affiliation(s)
- Thalita Basso Scandolara
- Laboratory of Tumor Biology, State University of West Paraná (Unioeste), Francisco Beltrão, Paraná, Brazil; Federal University of Rio de Janeiro, Brazil; Post-graduation Program of Health-Applied Sciences, State University of West Paraná (Unioeste), Francisco Beltrão, Paraná, Brazil
| | - Janaína Carla da Silva
- Laboratory of Tumor Biology, State University of West Paraná (Unioeste), Francisco Beltrão, Paraná, Brazil; Post-graduation Program of Health-Applied Sciences, State University of West Paraná (Unioeste), Francisco Beltrão, Paraná, Brazil
| | - Jéssica Malanowski
- Laboratory of Tumor Biology, State University of West Paraná (Unioeste), Francisco Beltrão, Paraná, Brazil
| | - Janoário Athanázio de Oliveira
- Laboratory of Tumor Biology, State University of West Paraná (Unioeste), Francisco Beltrão, Paraná, Brazil; Francisco Beltrão Cancer Hospital (Ceonc), Francisco Beltrão, Paraná, Brazil
| | - Daniel Rech
- Laboratory of Tumor Biology, State University of West Paraná (Unioeste), Francisco Beltrão, Paraná, Brazil; Post-graduation Program of Health-Applied Sciences, State University of West Paraná (Unioeste), Francisco Beltrão, Paraná, Brazil; Francisco Beltrão Cancer Hospital (Ceonc), Francisco Beltrão, Paraná, Brazil
| | - Carolina Panis
- Laboratory of Tumor Biology, State University of West Paraná (Unioeste), Francisco Beltrão, Paraná, Brazil; Post-graduation Program of Health-Applied Sciences, State University of West Paraná (Unioeste), Francisco Beltrão, Paraná, Brazil.
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8
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Wang M, Zhang T, Li L, Xie Q, Wang Y, Li Y, Chen Z. Protective effects of HY1702 on lipopolysaccharide-induced mild acute respiratory distress syndrome in mice. Eur J Pharmacol 2020; 887:173563. [PMID: 32949601 PMCID: PMC8368985 DOI: 10.1016/j.ejphar.2020.173563] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Revised: 09/11/2020] [Accepted: 09/14/2020] [Indexed: 12/24/2022]
Abstract
Acute respiratory distress syndrome is an inflammatory disease with no effective pharmacological treatment. We investigated the therapeutic effect of HY1702, a new small molecule diterpene obtained from the processing and modification of Glaucocalyxin A and may exhibit anti-inflammatory activity. Specifically, we studied the anti-inflammatory effects of HY1702 on lipopolysaccharide-induced inflammatory responses in RAW264.7 and THP-1 cells in vitro and its protective efficacy on lipopolysaccharide-induced mild acute respiratory distress syndrome in mice. Our results showed that HY1702 significantly decreased lipopolysaccharide-induced inflammatory cytokine expression in RAW264.7 and THP-1 cells and attenuated the secretion of nitric oxide and prostaglandin E2 by down-regulating the expression of inducible nitric oxide synthase and cyclooxygenase 2 in RAW264.7 cells. In mice with lipopolysaccharide-induced mild acute respiratory distress syndrome, HY1702 alleviated histological alterations in the lungs and reduced the alveolar cavity protein leakage and inflammatory cytokine expression in murine bronchial alveolar lavage fluid. HY1702 decreased the myeloperoxidase activity and lung wet to dry weight ratio. In our mechanism studies in lipopolysaccharide-exposed RAW264.7 cells, HY1702 suppressed the inflammation stimulated by lipopolysaccharide through inhibiting phosphorylation of inhibitor of nuclear factor κB kinase subunit α/β (IKKα/β) and inhibitor of nuclear factor κB subunit α (IκBα), further affecting the nuclear transfer of phosphorylated p65. Meanwhile, phosphorylation of p38 mitogen-activated protein (MAP) kinase and extracellular signal-regulated kinase (ERK) was inhibited. These data suggest that HY1702 can reduce inflammation on lipopolysaccharide-stimulated macrophages and attenuate the symptoms of mild acute respiratory distress syndrome in a murine model by regulating the nuclear factor κB and MAP kinase signalling pathways.
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Affiliation(s)
- Mengfei Wang
- Institutes of Biology and Medical Sciences, Jiangsu Key Laboratory of Infection and Immunity, Soochow University, Suzhou, 215123, PR China
| | - Tong Zhang
- Institutes of Biology and Medical Sciences, Jiangsu Key Laboratory of Infection and Immunity, Soochow University, Suzhou, 215123, PR China
| | - Ling Li
- Institutes of Biology and Medical Sciences, Jiangsu Key Laboratory of Infection and Immunity, Soochow University, Suzhou, 215123, PR China
| | - Qing Xie
- Institutes of Biology and Medical Sciences, Jiangsu Key Laboratory of Infection and Immunity, Soochow University, Suzhou, 215123, PR China
| | - Yanping Wang
- Institutes of Biology and Medical Sciences, Jiangsu Key Laboratory of Infection and Immunity, Soochow University, Suzhou, 215123, PR China
| | - Yunsen Li
- Institutes of Biology and Medical Sciences, Jiangsu Key Laboratory of Infection and Immunity, Soochow University, Suzhou, 215123, PR China.
| | - Zijun Chen
- Shanghai University of Traditional Chinese Medicine, Shanghai, China.
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9
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Contis Montes de Oca A, Cruz Baquero A, Campos Rodríguez R, Cárdenas Jaramillo LM, Aguayo Flores JE, Rojas Hernández S, Olivos García A, Pacheco Yepez J. Neutrophil extracellular traps and MPO in models of susceptibility and resistance against Entamoeba histolytica. Parasite Immunol 2020; 42:e12714. [PMID: 32187688 DOI: 10.1111/pim.12714] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Revised: 03/10/2020] [Accepted: 03/13/2020] [Indexed: 11/28/2022]
Abstract
The main effector mechanisms of neutrophils are the release of neutrophil extracellular traps (NETs) and myeloperoxidase (MPO). In this work, we evaluated the role of NETs and the activity of MPO in the interactions of rodent neutrophils with amoebae and in amoebic liver abscess (ALA)-resistant and ALA-susceptible models. We showed with in vitro assays that mice produced greater amounts of NETs and MPO than did hamsters, and the elastase activity was high in both models. However, the inhibition of NETs and MPO promoted an increase in amoeba viability in the mice. The mouse ALAs showed a more profound presence of NETs and MPO than did the hamster ALAs. We concluded that both effector mechanisms were essential for the amoebic damage and could prevent the formation of ALAs in the resistant model.
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Affiliation(s)
- Arturo Contis Montes de Oca
- Sección de Estudios de Posgrado e investigación, Escuela Superior de Medicina, Instituto Politécnico Nacional, CDMX, México
| | - Andrea Cruz Baquero
- Sección de Estudios de Posgrado e investigación, Escuela Superior de Medicina, Instituto Politécnico Nacional, CDMX, México.,Bacteriología, Facultad de Ciencias de la Salud, Universidad Colegio Mayor de Cundinamarca, Bogotá, Colombia
| | - Rafael Campos Rodríguez
- Sección de Estudios de Posgrado e investigación, Escuela Superior de Medicina, Instituto Politécnico Nacional, CDMX, México
| | - Luz María Cárdenas Jaramillo
- Coordinación de Ciencias Morfológicas, Escuela Superior de Medicina, Instituto Politécnico Nacional, CDMX, México
| | - José Eduardo Aguayo Flores
- Sección de Estudios de Posgrado e investigación, Escuela Superior de Medicina, Instituto Politécnico Nacional, CDMX, México
| | - Saúl Rojas Hernández
- Laboratorio de Inmunología Celular y Molecular, Sección de Estudios de Posgrado e investigación, Escuela Superior de Medicina, Instituto Politécnico Nacional, CDMX, México
| | - Alfonso Olivos García
- Departamento de Medicina Experimental, Facultad de Medicina, Universidad Nacional Autónoma de México, CDMX, México
| | - Judith Pacheco Yepez
- Sección de Estudios de Posgrado e investigación, Escuela Superior de Medicina, Instituto Politécnico Nacional, CDMX, México
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10
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Drews B, Landaverde LF, Kühl A, Drews U. Spontaneous embryo resorption in the mouse is triggered by embryonic apoptosis followed by rapid removal via maternal sterile purulent inflammation. BMC DEVELOPMENTAL BIOLOGY 2020; 20:1. [PMID: 31918653 PMCID: PMC6953269 DOI: 10.1186/s12861-019-0201-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/12/2019] [Accepted: 10/16/2019] [Indexed: 01/14/2023]
Abstract
Background In normal mammalian development a high percentage of implantations is lost by spontaneous resorption. This is a major problem in assisted reproduction and blastocyst transfer. Which embryo will be resorbed is unpredictable. Resorption is very fast, so that with conventional methods only final haemorrhagic stages are encountered. Here we describe the histology and immunohistochemistry of 23 spontaneous embryo resorptions between days 7 and 13 of murine development, which were identified by high-resolution ultrasound (US) in a previous study. Results In the early resorptions detected at day 7, the embryo proper was replaced by maternal haemorrhage and a suppurate focus of maternal neutrophils. In the decidua maternal macrophages transformed to foam cells and formed a second focus of tissue dissolution. In the late resorptions detected at day 9, the embryo underwent apoptosis without involvement of maternal cells. The apoptotic embryonic cells expressed caspase 3 and embryonic blood cells developed a macrophage like phenotype. Subsequently, the wall of the embryonic vesicle ruptured and the apoptotic embryo was aborted into the uterine lumen. Abortion was initiated by degeneration of the embryonic lacunar trophoblast and dissolution of the maternal decidua capsularis via sterile inflammation and accompanied by maternal haemorrhage, invasion of the apoptotic embryo by maternal neutrophils, and contraction rings of the uterine muscle layers. Conclusions We conclude that spontaneous resorption starts with endogenous apoptosis of the embryo without maternal contribution. After break down of the foetal-maternal border, the apoptotic embryo is invaded by maternal neutrophils, aborted into the uterine lumen, and rapidly resorbed. We assume that the innate maternal unspecific inflammation is elicited by disintegrating apoptotic embryonic cells. Graphical abstract ![]()
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Affiliation(s)
- Barbara Drews
- Group Animal Physiology, Institute of Agricultural Sciences, Departement Environmental System Science, Swiss Federal Institue of Technology (ETH),, Zurich, Switzerland.
| | - Luis Flores Landaverde
- Group Reproduction Management, Institute of Zoo- and Wildlife Medicine (IZW), Berlin, Germany
| | - Anja Kühl
- Core Unit Immunopathology (ipath), Charité, Berlin, Germany
| | - Ulrich Drews
- Institute of Anatomy, Prof. em., University of Tubingen, Tubingen, Germany
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11
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Wang X, He P, Yi S, Wang C. Thearubigin regulates the production of Nrf2 and alleviates LPS-induced acute lung injury in neonatal rats. 3 Biotech 2019; 9:451. [PMID: 31832298 DOI: 10.1007/s13205-019-1986-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2019] [Accepted: 11/06/2019] [Indexed: 11/29/2022] Open
Abstract
This study was undertaken to investigate the effect of natural bioactive compound thearubigin on neonatal acute lung injury (ALI) using LPS-induced ALI as a model. We also attempted to understand the possible underlying mechanism. The effect of thearubigin on lung wet-to-dry weight ratio, the activity of LDH, lung histopathology, BALF protein levels, the activity of MPO, production and extravasation of cytokines and oxidative stress were studied. The results showed that thearubigin caused a significant reduction in lung inflammation as evident from lung wet-to-dry weight ratio, BALF protein levels and MPO activity and histopathological analysis. It was further observed that the attenuation in inflammation happened due to a significant reduction in cytokine levels in alveolar cavities. Thearubigin also showed strong antioxidant properties as evidenced by reduced levels of oxygen species such as H2O2, MDA and OH ion. Additionally, the antioxidant response element nuclear factor erythroid-2-related factor 2 (Nrf2) pathway was found to be activated in thearubigin-treated group. These results provided a possible mechanism of antioxidant activity of thearubigin in neonatal ALI. Overall, this study showed that thearubigin can be a natural alternative for the treatment of neonatal ALI. However, further studies are required to understand its mechanism antioxidant and anti-inflammatory action.
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Affiliation(s)
- Xiang Wang
- 1Department of Emergency, Hainan Provincial People's Hospital, No.8 of Longhua Road, Haikou, 570100 Hainan Province China
| | - Ping He
- 1Department of Emergency, Hainan Provincial People's Hospital, No.8 of Longhua Road, Haikou, 570100 Hainan Province China
| | - Shengyang Yi
- 1Department of Emergency, Hainan Provincial People's Hospital, No.8 of Longhua Road, Haikou, 570100 Hainan Province China
| | - Chundie Wang
- 2Health Center, Hainan Provincial People's Hospital, Haikou, 570100 Hainan Province China
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12
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Feng G, Sun B, Liu HX, Liu QH, Zhao L, Wang TL. EphA2 antagonism alleviates LPS-induced acute lung injury via Nrf2/HO-1, TLR4/MyD88 and RhoA/ROCK pathways. Int Immunopharmacol 2019; 72:176-185. [PMID: 30986645 DOI: 10.1016/j.intimp.2019.04.008] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2019] [Revised: 03/27/2019] [Accepted: 04/03/2019] [Indexed: 01/09/2023]
Abstract
Eph receptor tyrosine kinases have a wide range of biological functions and have gradually been recognized increasingly as key regulators of inflammation and injury diseases. Although previous studies suggested that EphA2 receptor may be involved in the regulation of inflammation and vascular permeability in injured lung, the detailed effects of EphA2 on LPS-induced acute lung injury (ALI) are still inadequate and the underlying mechanism remains poorly understood. In this study, we detected the effects of EphA2 antagonism on inflammation, pulmonary vascular permeability and oxidative stress in LPS-induced ALI and investigate the potential mechanism. Our results showed that EphA2 antagonism markedly inhibited the cytokines release and inflammatory cells infiltration in BALF, prevented the LPS-induced elevations of MPO activity and MDA level in lung tissues. Our study also found that EphA2 antagonism significantly decreased the wet/dry ratios, reduced the Evans blue albumin extravasation in lung tissues and obviously alleviated the LPS-induced increment of pulmonary vascular permeability. Mechanistically, EphA2 antagonism significantly increased the activation of Nrf2 along with its target antioxidant enzyme HO-1 and inhibited the expressions of TLR4/MyD88 in lung tissues and A549 alveolar epithelial cells. Furthermore, EphA2 antagonism dramatically inhibited the LPS-evoked activations of RhoA/ROCK in lung tissues. In conclusion, our data indicate that EphA2 receptor plays an essential role in LPS-induced ALI and EphA2 antagonism has protective effects against LPS-induced ALI via Nrf2/HO-1, TLR4/MyD88 and RhoA/ROCK pathways. These results suggest that antagonism of EphA2 may be an effective therapeutic strategy for the treatment of ALI.
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Affiliation(s)
- Guang Feng
- Department of Anesthesiology, Xuanwu Hospital, Capital Medical University, Beijing 100053, PR China
| | - Bo Sun
- Department of Anesthesiology, The Second Affiliated Hospital of Soochow University, Suzhou 215004, PR China
| | - Hai-Xia Liu
- Department of Anesthesiology, Xuanwu Hospital, Capital Medical University, Beijing 100053, PR China
| | - Qing-Hai Liu
- Department of Anesthesiology, Xuanwu Hospital, Capital Medical University, Beijing 100053, PR China
| | - Lei Zhao
- Department of Anesthesiology, Xuanwu Hospital, Capital Medical University, Beijing 100053, PR China
| | - Tian-Long Wang
- Department of Anesthesiology, Xuanwu Hospital, Capital Medical University, Beijing 100053, PR China.
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13
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Wang F, Chen S, Deng L, Chen L, Huang Y, Tian M, Li C, Zhou X. Protective Effects of Astragaloside IV against LPS-Induced Endometritis in Mice through Inhibiting Activation of the NF-κB, p38 and JNK Signaling Pathways. Molecules 2019; 24:molecules24020373. [PMID: 30669661 PMCID: PMC6360020 DOI: 10.3390/molecules24020373] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2018] [Revised: 01/02/2019] [Accepted: 01/18/2019] [Indexed: 01/09/2023] Open
Abstract
Endometritis, inflammation of the endometrium, is a common reproductive obstacle disease that can lead to infertility in female animals. Astragaloside IV (AS IV), one of the major and active components of the Astragalus membranaceus (Fisch.) Bunge, is known for its anti-inflammatory effects. In the present study, the effects and mechanisms of AS IV on lipopolysaccharide (LPS)-induced endometritis were investigated using a mouse model. Female mice were prepared with AS IV (0.01 mg/g) by gavage for six days before being stimulated with LPS. The results showed that the histopathological changes, levels of inflammatory cytokines (IL-1β and TNF-α), concentration of NO, and myeloperoxidase (MPO) activity in LPS-induced uteri were attenuated significantly by pretreatment with AS IV. Furthermore, LPS-induced activations of NF-κB, p38, and JNK signal pathways were suppressed by pretreatment with AS IV. In conclusion, the data provided new evidence that AS IV effectively attenuates LPS-induced endometritis through inhibition of TLR4-mediated NF-κB, p38, and JNK signaling pathways, implying that AS IV might become a promising potential anti-inflammatory agent for endometritis and other inflammatory diseases.
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Affiliation(s)
- Fengge Wang
- College of Animal Sciences, Jilin University, Changchun, 5333 Xian Road, Changchun, Jilin 130062, China.
| | - Shuxiong Chen
- College of Animal Sciences, Jilin University, Changchun, 5333 Xian Road, Changchun, Jilin 130062, China.
| | - Liang Deng
- College of Animal Sciences, Jilin University, Changchun, 5333 Xian Road, Changchun, Jilin 130062, China.
| | - Lu Chen
- College of Animal Sciences, Jilin University, Changchun, 5333 Xian Road, Changchun, Jilin 130062, China.
| | - Yuwen Huang
- College of Animal Sciences, Jilin University, Changchun, 5333 Xian Road, Changchun, Jilin 130062, China.
| | - Meng Tian
- College of Animal Sciences, Jilin University, Changchun, 5333 Xian Road, Changchun, Jilin 130062, China.
| | - Chunjin Li
- College of Animal Sciences, Jilin University, Changchun, 5333 Xian Road, Changchun, Jilin 130062, China.
| | - Xu Zhou
- College of Animal Sciences, Jilin University, Changchun, 5333 Xian Road, Changchun, Jilin 130062, China.
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14
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Gilyarov MY, Belikova LP, Shchukin IA, Fidler MS, Avakyan GG, Shustrova GE, Martynov MY, Svet AV. [Neurological disorders in eosinophilic granulomatosis with polyangiitis (Churg-Strauss syndrome)]. Zh Nevrol Psikhiatr Im S S Korsakova 2018. [PMID: 28635862 DOI: 10.17116/jnevro201611610193-102] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Eosinophilic granulomatosis with polyangiitis - EGPA (Churg-Strauss syndrome) is a rare autoimmune disorder. The pathogenesis of the disease includes production of anti-neutrophil cytoplasmic antibodies directed against myeloperoxidase with the development of small-vessel necrotizing vasculitis and eosinophilic infiltration of organs. The involvement of peripheral and central nervous system is observed in more than 3/4 of cases. The authors describe three patients with EGPA. In a 53-year-old male patient, EGPA manifested with multiple neuropathies, which regressed after treatment with corticosteroids and cytostatics. In a 34-year-old woman, cerebral sinus thrombosis and cerebral infarction developed in the non-active period of long-term EGPA. The patient was treated with anticoagulants. A 77-year-old woman with a newly diagnosed EGPA, confirmed by bone marrow examination for eosinophilia, developed ischemic stroke and polyneuropathy. The causes and mechanisms of development as well as dynamics and outcomes of neurological disorders, differential diagnosis, treatment and prognosis of eosinophilic granulomatosis with polyangiitis are discussed.
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Affiliation(s)
| | | | - I A Shchukin
- Pirogov City Clinical Hospital, Moscow, Russia; Pirogov Russian National Research Medical University, Moscow, Russia
| | - M S Fidler
- Pirogov City Clinical Hospital, Moscow, Russia; Pirogov Russian National Research Medical University, Moscow, Russia
| | - G G Avakyan
- Pirogov City Clinical Hospital, Moscow, Russia; Pirogov Russian National Research Medical University, Moscow, Russia
| | | | - M Yu Martynov
- Pirogov City Clinical Hospital, Moscow, Russia; Pirogov Russian National Research Medical University, Moscow, Russia
| | - A V Svet
- Pirogov City Clinical Hospital, Moscow, Russia
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15
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de Boer M, van Leeuwen K, Geissler J, van Alphen F, de Vries E, van der Kuip M, Terheggen SW, Janssen H, van den Berg TK, Meijer AB, Roos D, Kuijpers TW. Hermansky-Pudlak syndrome type 2: Aberrant pre-mRNA splicing and mislocalization of granule proteins in neutrophils. Hum Mutat 2017; 38:1402-1411. [DOI: 10.1002/humu.23271] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2016] [Revised: 05/25/2017] [Accepted: 05/29/2017] [Indexed: 02/03/2023]
Affiliation(s)
- Martin de Boer
- Sanquin Research; and Landsteiner Laboratory; Academic Medical Center (AMC); University of Amsterdam; Amsterdam The Netherlands
| | - Karin van Leeuwen
- Sanquin Research; and Landsteiner Laboratory; Academic Medical Center (AMC); University of Amsterdam; Amsterdam The Netherlands
| | - Judy Geissler
- Sanquin Research; and Landsteiner Laboratory; Academic Medical Center (AMC); University of Amsterdam; Amsterdam The Netherlands
| | - Floris van Alphen
- Sanquin Research; and Landsteiner Laboratory; Academic Medical Center (AMC); University of Amsterdam; Amsterdam The Netherlands
| | - Esther de Vries
- Department of Pediatrics; Jeroen Bosch Hospital; ‘s-Hertogenbosch; The Netherlands & Tranzo; Tilburg University; Tilburg The Netherlands
| | - Martijn van der Kuip
- Department of Pediatric Infectious Diseases and Immunology; VU University Medical Center, Amsterdam, The Netherlands
| | - Suzanne W.J. Terheggen
- Department of Pediatrics; Erasmus University Medical Center (EMC); Rotterdam The Netherlands
| | - Hans Janssen
- Division of Cell Biology; The Netherlands Cancer Institute; Amsterdam The Netherlands
| | - Timo K. van den Berg
- Sanquin Research; and Landsteiner Laboratory; Academic Medical Center (AMC); University of Amsterdam; Amsterdam The Netherlands
| | - Alexander B. Meijer
- Sanquin Research; and Landsteiner Laboratory; Academic Medical Center (AMC); University of Amsterdam; Amsterdam The Netherlands
| | - Dirk Roos
- Sanquin Research; and Landsteiner Laboratory; Academic Medical Center (AMC); University of Amsterdam; Amsterdam The Netherlands
| | - Taco W. Kuijpers
- Sanquin Research; and Landsteiner Laboratory; Academic Medical Center (AMC); University of Amsterdam; Amsterdam The Netherlands
- Department of Pediatric Hematology; Immunology and Infectious Diseases; Academic Medical Center; Emma Children's Hospital; Amsterdam The Netherlands
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16
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Wu G, Dai X, Li X, Jiang H. ANTIOXIDANT AND ANTI-INFLAMMATORY EFFECTS OF RHAMNAZIN ON LIPOPOLYSACCHARIDE-INDUCED ACUTE LUNG INJURY AND INFLAMMATION IN RATS. AFRICAN JOURNAL OF TRADITIONAL, COMPLEMENTARY, AND ALTERNATIVE MEDICINES 2017. [PMID: 28638883 PMCID: PMC5471467 DOI: 10.21010/ajtcam.v14i4.23] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Background: Acute Lung Injury (ALI) results into severe inflammation and oxidative stress to the pulmonary tissue. Rhamnazin is a natural flavonoid and known for its antioxidant and anti-inflammatory properties. Materials and methods: The antioxidative and anti-inflammatory properties rhamnazin were tested for protection against the acute lung injury. We investigated whether rhamnazin improves the lipopolysaccharide (LPS)-induced ALI in an animal model (rat). We also studied the probable molecular mechanism of action of rhamnazin. Rhamnazin was injected intraperitoneally (i.p.) (5, 10 and 20 mg/kg) two days before intratracheal LPS challenge (5mg/kg). The changes in lung wet-to-dry weight ratio, LDH activity, pulmonary histopathology, BALF protein concentration, MPO activity, oxidative stress, cytokine production were estimated. Results: The results showed a significant attenuation of all the inflammatory parameters and a marked improvement in the pulmonary histopathology in the animal groups pretreated with rhamnazin. The rhamnazin pretreated group also showed activation of Nrf2 pathway and attenuation of ROS such as H2O2, MDA and hydroxyl ion. These results indicated that rhamnazin could attenuate the symptoms of ALI in rats due to its strong antioxidant and anti-inflammatory properties. Conclusion: The results strongly demonstrated that rhamnazin provides protection against LPS-induced ALI. The underlying mechanisms of its anti-inflammatory action may include inhibition of Nrf2 mediated antioxidative pathway.
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Affiliation(s)
- GuoRong Wu
- Department of respiratory medicine, Changzhou Jintan District People's Hospital, Changzhou, Jiangsu 213200, China
| | - XiaoPing Dai
- Department of respiratory medicine, Changzhou Jintan District People's Hospital, Changzhou, Jiangsu 213200, China
| | - XiangRong Li
- Department of respiratory medicine, Changzhou Jintan District People's Hospital, Changzhou, Jiangsu 213200, China
| | - HePing Jiang
- Department of respiratory medicine, Changzhou Jintan District People's Hospital, Changzhou, Jiangsu 213200, China
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17
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The alleviative effects of metformin for lipopolysaccharide-induced acute lung injury rat model and its underlying mechanism. Saudi Pharm J 2017; 25:666-670. [PMID: 28579909 PMCID: PMC5447443 DOI: 10.1016/j.jsps.2017.05.001] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
For patients who have sepsis, acute lung injury (ALI) causes most of death. Metformin (Met) is an anti-hyperglycemic agent and it has extensive pharmacological properties. This study aimed to analyze the influence of Met on lipopolysaccharide (LPS) -induced ALI. Met (1, 2, and 4 mg/kg) were injected and LPS was injected 30 min later. The data suggested Met can reduce release of inflammatory cytokines and bronchoalveolar lavage fluid (BALF) protein expression, reduce lung wet/dry ratio, and significantly improve LPS-induced lung destruction during ALI. In addition, Met inhibits LPS-induced neutrophil and macrophage infiltration, reduces MPO activity, and promotes AMPK-α1 expression in lung tissues. Our data suggested that metformin alleviates capillary injury during ALI via AMPK-α1.
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18
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Du J, Li X, Lin C, He X. Protective Effects of Arachidonic Acid Against Paraquat-Induced Pulmonary Injury. Inflammation 2016; 38:1458-63. [PMID: 25633425 DOI: 10.1007/s10753-015-0120-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
In this study, we aimed to study the effects of arachidonic acid (AA) on acute lung injury (ALI) caused by paraquat (PQ) in mice. Male Kunming mice were randomly divided into three groups: control group, PQ group, and PQ + AA group (n = 24). The mice in the PQ and PQ + AA groups received a single oral dose of 20 mg/kg bodyweight PQ, and the mice of the PQ + AA group were challenged by 500 mg/kg bodyweight AA posttreatment 2 h after PQ administration. The results indicated that the administration of AA significantly increased the activity of superoxide dismutase (SOD), decreased the activity of myeloperoxidase (MPO), the content of malondialdehyde (MDA), and the level of lactate dehydrogenase (LDH). Pathological examination also revealed that AA effectively alleviated PQ-induced histological damage. Furthermore, AA significantly reduced PQ-induced upregulations of inflammatory mediators such as tumor necrosis factor (TNF)-α, interleukin (IL)-1β, IL-6, and IL-8. These results demonstrated that AA had effective protection against PQ-induced ALI.
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Affiliation(s)
- Jianxin Du
- Pulmonary Department, Affiliated Hospital of QingDao University, Qingdao, 266003, People's Republic China
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19
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Gazendam RP, van Hamme JL, Tool ATJ, Hoogenboezem M, van den Berg JM, Prins JM, Vitkov L, van de Veerdonk FL, van den Berg TK, Roos D, Kuijpers TW. Human Neutrophils Use Different Mechanisms To Kill Aspergillus fumigatus Conidia and Hyphae: Evidence from Phagocyte Defects. THE JOURNAL OF IMMUNOLOGY 2015; 196:1272-83. [PMID: 26718340 DOI: 10.4049/jimmunol.1501811] [Citation(s) in RCA: 123] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2015] [Accepted: 11/25/2015] [Indexed: 02/04/2023]
Abstract
Neutrophils are known to play a pivotal role in the host defense against Aspergillus infections. This is illustrated by the prevalence of Aspergillus infections in patients with neutropenia or phagocyte functional defects, such as chronic granulomatous disease. However, the mechanisms by which human neutrophils recognize and kill Aspergillus are poorly understood. In this work, we have studied in detail which neutrophil functions, including neutrophil extracellular trap (NET) formation, are involved in the killing of Aspergillus fumigatus conidia and hyphae, using neutrophils from patients with well-defined genetic immunodeficiencies. Recognition of conidia involves integrin CD11b/CD18 (and not dectin-1), which triggers a PI3K-dependent nonoxidative intracellular mechanism of killing. When the conidia escape from early killing and germinate, the extracellular destruction of the Aspergillus hyphae needs opsonization by Abs and involves predominantly recognition via Fcγ receptors, signaling via Syk, PI3K, and protein kinase C to trigger the production of toxic reactive oxygen metabolites by the NADPH oxidase and myeloperoxidase. A. fumigatus induces NET formation; however, NETs did not contribute to A. fumigatus killing. Thus, our findings reveal distinct killing mechanisms of Aspergillus conidia and hyphae by human neutrophils, leading to a comprehensive insight in the innate antifungal response.
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Affiliation(s)
- Roel P Gazendam
- Sanquin Research and Landsteiner Laboratory, Academic Medical Center, University of Amsterdam, 1066 CX Amsterdam, the Netherlands;
| | - John L van Hamme
- Sanquin Research and Landsteiner Laboratory, Academic Medical Center, University of Amsterdam, 1066 CX Amsterdam, the Netherlands
| | - Anton T J Tool
- Sanquin Research and Landsteiner Laboratory, Academic Medical Center, University of Amsterdam, 1066 CX Amsterdam, the Netherlands
| | - Mark Hoogenboezem
- Sanquin Research and Landsteiner Laboratory, Academic Medical Center, University of Amsterdam, 1066 CX Amsterdam, the Netherlands
| | - J Merlijn van den Berg
- Department of Pediatric Hematology, Immunology, and Infectious Diseases, Emma Children's Hospital, Academic Medical Center, University of Amsterdam, 1105 AZ Amsterdam, the Netherlands
| | - Jan M Prins
- Department of Internal Medicine, Academic Medical Center, University of Amsterdam, 1105 AZ Amsterdam, the Netherlands
| | - Ljubomir Vitkov
- Department of Zoological Structure Research and Cell Biology, University of Salzburg, 5020 Salzburg, Austria; and
| | - Frank L van de Veerdonk
- Nijmegen Center for Infection, Immunity, and Inflammation (N4i), Radboud University, Nijmegen Medical Center, 6525 HP Nijmegen, the Netherlands
| | - Timo K van den Berg
- Sanquin Research and Landsteiner Laboratory, Academic Medical Center, University of Amsterdam, 1066 CX Amsterdam, the Netherlands
| | - Dirk Roos
- Sanquin Research and Landsteiner Laboratory, Academic Medical Center, University of Amsterdam, 1066 CX Amsterdam, the Netherlands
| | - Taco W Kuijpers
- Sanquin Research and Landsteiner Laboratory, Academic Medical Center, University of Amsterdam, 1066 CX Amsterdam, the Netherlands; Department of Pediatric Hematology, Immunology, and Infectious Diseases, Emma Children's Hospital, Academic Medical Center, University of Amsterdam, 1105 AZ Amsterdam, the Netherlands
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20
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Lv X, Fu K, Li W, Wang Y, Wang J, Li H, Tian W, Cao R. TIIA attenuates LPS-induced mouse endometritis by suppressing the NF-κB signaling pathway. Can J Physiol Pharmacol 2015; 93:967-71. [DOI: 10.1139/cjpp-2015-0003] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Endometritis is one of the main diseases that harms the dairy cow industry. Tanshinone IIA (TIIA), a fat-soluble alkaloid isolated from Salviae miltiorrhizae, has been reported to have potent anti-inflammatory properties. However, the anti-inflammatory effects of TIIA on a mouse model of lipopolysaccharide (LPS)-induced endometritis remain to be elucidated. The purpose of the present study was to investigate the effects of TIIA on LPS-induced mouse endometritis. TIIA was intraperitoneally injected 1 h before and 12 h after perfusion of LPS into the uterus. A histological examination was then performed, and the concentrations of myeloperoxidase (MPO) and nitric oxide (NO) in the uterine tissue were determined. The levels of tumor necrosis factor-α (TNF-α) and interleukin-1β (IL-1β) in a homogenate of the uterus were detected by enzyme-linked immunosorbent assay. The extent of phosphorylation of IκBα and p65 was detected by Western blotting. TIIA markedly reduced the infiltration of neutrophils, suppressed MPO activity and the concentration of NO, and attenuated the expression of TNF-α and IL-1β. Furthermore, TIIA inhibited the phosphorylation of the nuclear factor-kappa B (NF-κB) p65 subunit and the degradation of its inhibitor IκBα. All the results suggest that TIIA has strong anti-inflammatory effects on LPS-induced mouse endometritis.
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Affiliation(s)
- Xiaopei Lv
- Department of Clinical Veterinary Medicine, College of Animal Science and Veterinary Medicine, Qingdao Agricultural University, Qingdao, Shandong Province 266109, People’s Republic of China
- Department of Clinical Veterinary Medicine, College of Animal Science and Veterinary Medicine, Qingdao Agricultural University, Qingdao, Shandong Province 266109, People’s Republic of China
| | - Kaiqiang Fu
- Department of Clinical Veterinary Medicine, College of Animal Science and Veterinary Medicine, Qingdao Agricultural University, Qingdao, Shandong Province 266109, People’s Republic of China
- Department of Clinical Veterinary Medicine, College of Animal Science and Veterinary Medicine, Qingdao Agricultural University, Qingdao, Shandong Province 266109, People’s Republic of China
| | - Weishi Li
- Department of Clinical Veterinary Medicine, College of Animal Science and Veterinary Medicine, Qingdao Agricultural University, Qingdao, Shandong Province 266109, People’s Republic of China
- Department of Clinical Veterinary Medicine, College of Animal Science and Veterinary Medicine, Qingdao Agricultural University, Qingdao, Shandong Province 266109, People’s Republic of China
| | - Yu Wang
- Department of Clinical Veterinary Medicine, College of Animal Science and Veterinary Medicine, Qingdao Agricultural University, Qingdao, Shandong Province 266109, People’s Republic of China
- Department of Clinical Veterinary Medicine, College of Animal Science and Veterinary Medicine, Qingdao Agricultural University, Qingdao, Shandong Province 266109, People’s Republic of China
| | - Jifang Wang
- Department of Clinical Veterinary Medicine, College of Animal Science and Veterinary Medicine, Qingdao Agricultural University, Qingdao, Shandong Province 266109, People’s Republic of China
- Department of Clinical Veterinary Medicine, College of Animal Science and Veterinary Medicine, Qingdao Agricultural University, Qingdao, Shandong Province 266109, People’s Republic of China
| | - Huatao Li
- Department of Clinical Veterinary Medicine, College of Animal Science and Veterinary Medicine, Qingdao Agricultural University, Qingdao, Shandong Province 266109, People’s Republic of China
- Department of Clinical Veterinary Medicine, College of Animal Science and Veterinary Medicine, Qingdao Agricultural University, Qingdao, Shandong Province 266109, People’s Republic of China
| | - Wenru Tian
- Department of Clinical Veterinary Medicine, College of Animal Science and Veterinary Medicine, Qingdao Agricultural University, Qingdao, Shandong Province 266109, People’s Republic of China
- Department of Clinical Veterinary Medicine, College of Animal Science and Veterinary Medicine, Qingdao Agricultural University, Qingdao, Shandong Province 266109, People’s Republic of China
| | - Rongfeng Cao
- Department of Clinical Veterinary Medicine, College of Animal Science and Veterinary Medicine, Qingdao Agricultural University, Qingdao, Shandong Province 266109, People’s Republic of China
- Department of Clinical Veterinary Medicine, College of Animal Science and Veterinary Medicine, Qingdao Agricultural University, Qingdao, Shandong Province 266109, People’s Republic of China
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Fisetin Alleviates Lipopolysaccharide-Induced Acute Lung Injury via TLR4-Mediated NF-κB Signaling Pathway in Rats. Inflammation 2015; 39:148-157. [DOI: 10.1007/s10753-015-0233-y] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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22
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Chang PY, Qu YQ, Wang J, Dong LH. The potential of mesenchymal stem cells in the management of radiation enteropathy. Cell Death Dis 2015; 6:e1840. [PMID: 26247725 PMCID: PMC4558492 DOI: 10.1038/cddis.2015.189] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2015] [Revised: 06/02/2015] [Accepted: 06/08/2015] [Indexed: 12/20/2022]
Abstract
Although radiotherapy is effective in managing abdominal and pelvic malignant tumors, radiation enteropathy is still unavoidable. This disease severely affects the quality of life of cancer patients due to some refractory lesions, such as intestinal ischemia, mucositis, ulcer, necrosis or even perforation. Current drugs or prevailing therapies are committed to alleviating the symptoms induced by above lesions. But the efficacies achieved by these interventions are still not satisfactory, because the milieus for tissue regeneration are not distinctly improved. In recent years, regenerative therapy for radiation enteropathy by using mesenchymal stem cells is of public interests. Relevant results of preclinical and clinical studies suggest that this regenerative therapy will become an attractive tool in managing radiation enteropathy, because mesenchymal stem cells exhibit their pro-regenerative potentials for healing the injuries in both epithelium and endothelium, minimizing inflammation and protecting irradiated intestine against fibrogenesis through activating intrinsic repair actions. In spite of these encouraging results, whether mesenchymal stem cells promote tumor growth is still an issue of debate. On this basis, we will discuss the advances in anticancer therapy by using mesenchymal stem cells in this review after analyzing the pathogenesis of radiation enteropathy, introducing the advances in managing radiation enteropathy using regenerative therapy and exploring the putative actions by which mesenchymal stem cells repair intestinal injuries. At last, insights gained from the potential risks of mesenchymal stem cell-based therapy for radiation enteropathy patients may provide clinicians with an improved awareness in carrying out their studies.
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Affiliation(s)
- P-Y Chang
- 1] Department of Radiation Oncology, The First Bethune Hospital of Jilin University, Changchun 130021, China [2] Electrochemical State Key Laboratory, Changchun Institute of Applied Chemistry Academy of Science, Changchun 130021, China
| | - Y-Q Qu
- Department of Radiation Oncology, The First Bethune Hospital of Jilin University, Changchun 130021, China
| | - J Wang
- Electrochemical State Key Laboratory, Changchun Institute of Applied Chemistry Academy of Science, Changchun 130021, China
| | - L-H Dong
- Department of Radiation Oncology, The First Bethune Hospital of Jilin University, Changchun 130021, China
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23
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Feng G, Sun B, Li TZ. Daidzein attenuates lipopolysaccharide-induced acute lung injury via toll-like receptor 4/NF-kappaB pathway. Int Immunopharmacol 2015; 26:392-400. [DOI: 10.1016/j.intimp.2015.04.002] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2015] [Revised: 04/01/2015] [Accepted: 04/02/2015] [Indexed: 12/19/2022]
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24
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Yao J, Pan D, Zhao Y, Zhao L, Sun J, Wang Y, You QD, Xi T, Guo QL, Lu N. Wogonin prevents lipopolysaccharide-induced acute lung injury and inflammation in mice via peroxisome proliferator-activated receptor gamma-mediated attenuation of the nuclear factor-kappaB pathway. Immunology 2014; 143:241-57. [PMID: 24766487 DOI: 10.1111/imm.12305] [Citation(s) in RCA: 76] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2013] [Revised: 04/17/2014] [Accepted: 04/22/2014] [Indexed: 01/11/2023] Open
Abstract
Acute lung injury (ALI) from a variety of clinical disorders, characterized by diffuse inflammation, is a cause of acute respiratory failure that develops in patients of all ages. Previous studies reported that wogonin, a flavonoid-like chemical compound which was found in Scutellaria baicalensis, has anti-inflammatory effects in several inflammation models, but not in ALI. Here, the in vivo protective effect of wogonin in the amelioration of lipopolysaccharide (LPS) -induced lung injury and inflammation was assessed. In addition, the in vitro effects and mechanisms of wogonin were studied in the mouse macrophage cell lines Ana-1 and RAW264.7. In vivo results indicated that wogonin attenuated LPS-induced histological alterations. Peripheral blood leucocytes decreased in the LPS-induced group, which was ameliorated by wogonin. In addition, wogonin inhibited the production of several inflammatory cytokines, including tumour necrosis factor-α, interleukin-1β (IL-1β) and IL-6, in the bronchoalveolar lavage fluid and lung tissues after LPS challenge, while the peroxisome proliferator-activated receptor γ (PPARγ) inhibitor GW9662 reversed these effects. In vitro results indicated that wogonin significantly decreased the secretion of IL-6, IL-1β and tumour necrosis factor-α in Ana-1 and RAW264.7 cells, which was suppressed by transfection of PPARγ small interfering RNA and GW9662 treatment. Moreover, wogonin activated PPARγ, induced PPARγ-mediated attenuation of the nuclear translocation and the DNA-binding activity of nuclear factor-κB in vivo and in vitro. In conclusion, all of these results showed that wogonin may serve as a promising agent for the attenuation of ALI-associated inflammation and pathology by regulating the PPARγ-involved nuclear factor-κB pathway.
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Affiliation(s)
- Jing Yao
- Jiangsu Key Laboratory of Carcinogenesis and Intervention, China Pharmaceutical University, Nanjing, China; School of Life Science and Technology, China Pharmaceutical University, Nanjing, China
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25
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Tyagi N, Kumari A, Dash D, Singh R. Protective effects of intranasal curcumin on paraquot induced acute lung injury (ALI) in mice. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2014; 38:913-921. [PMID: 25461551 DOI: 10.1016/j.etap.2014.10.003] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2014] [Revised: 10/06/2014] [Accepted: 10/10/2014] [Indexed: 06/04/2023]
Abstract
Paraquot (PQ) is widely and commonly used as herbicide and has been reported to be hazardous as it causes lung injury. However, molecular mechanism underlying lung toxicity caused by PQ has not been elucidated. Curcumin, a known anti-inflammatory molecule derived from rhizomes of Curcuma longa has variety of pharmacological activities including free-radical scavenging properties but the protective effects of curcumin on PQ-induced acute lung injury (ALI) have not been studied. In this study, we aimed to study the effects of curcumin on ALI caused by PQ in male parke's strain mice which were challenged acutely by PQ (50mg/kg, i.p.) with or without curcumin an hour before (5mg/kg, i.n.) PQ intoxication. Lung specimens and the bronchoalveolar lavage fluid (BALF) were isolated for pathological and biochemical analysis after 48h of PQ exposure. Curcumin administration has significantly enhanced superoxide dismutase (SOD) and catalase activities. Lung wet/dry weight ratio, malondialdehyde (MDA) and lactate dehydrogenase (LDH) content, total cell number and myeloperoxidase (MPO) levels in BALF as well as neutrophil infiltration were attenuated by curcumin. Pathological studies also revealed that intranasal curcumin alleviate PQ-induced pulmonary damage and pro-inflammatory cytokine levels like tumor necrosis factor-α (TNF-α) and nitric oxide (NO). These results suggest that intranasal curcumin may directly target lungs and curcumin inhalers may prove to be effective in PQ-induced ALI treatment in near future.
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Affiliation(s)
- Namitosh Tyagi
- Department of Zoology, MMV, Banaras Hindu University, Varanasi, 221005, India
| | - Asha Kumari
- Department of Zoology, MMV, Banaras Hindu University, Varanasi, 221005, India
| | - D Dash
- Department of Biochemistry, Institute of Medical Sciences, Banaras Hindu University, Varanasi, 221005, India
| | - Rashmi Singh
- Department of Zoology, MMV, Banaras Hindu University, Varanasi, 221005, India.
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Millet A, Pederzoli-Ribeil M, Guillevin L, Witko-Sarsat V, Mouthon L. Republished: Antineutrophil cytoplasmic antibody-associated vasculitides: is it time to split up the group? Postgrad Med J 2014; 90:290-6. [DOI: 10.1136/postgradmedj-2013-203255rep] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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27
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Tian ZG, Ji Y, Yan WJ, Xu CY, Kong QY, Han F, Zhao Y, Pang QF. Methylene blue protects against paraquat-induced acute lung injury in rats. Int Immunopharmacol 2013; 17:309-13. [DOI: 10.1016/j.intimp.2013.06.022] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2012] [Revised: 06/17/2013] [Accepted: 06/20/2013] [Indexed: 01/30/2023]
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28
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Jung YY, Nam Y, Park YS, Lee HS, Hong SA, Kim BK, Park ES, Chung YH, Jeong JH. Protective effect of phosphatidylcholine on lipopolysaccharide-induced acute inflammation in multiple organ injury. THE KOREAN JOURNAL OF PHYSIOLOGY & PHARMACOLOGY : OFFICIAL JOURNAL OF THE KOREAN PHYSIOLOGICAL SOCIETY AND THE KOREAN SOCIETY OF PHARMACOLOGY 2013; 17:209-16. [PMID: 23776397 PMCID: PMC3682081 DOI: 10.4196/kjpp.2013.17.3.209] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/04/2013] [Accepted: 04/22/2013] [Indexed: 02/06/2023]
Abstract
Soybean polyunsaturated phosphatidylcholine (PC) is thought to exert anti-inflammatory activities and has potent effects in attenuating acute renal failure and liver dysfunction. The aim of this study was to investigate the effects of PC in protecting multiple organ injury (MOI) from lipopolysaccharide (LPS). Six groups of rats (N=8) were used in this study. Three groups acted as controls and received only saline, hydrocortisone (HC, 6 mg/kg, i.v.) or PC (600 mg/kg, i.p.) without LPS (15 mg/kg, i.p.) injections. Other 3 groups, as the test groups, were administered saline, HC or PC in the presence of LPS. Six hours after the LPS injection, blood and organs (lung, liver and kidney) were collected from each group to measure inflammatory cytokines and perform histopathology and myeloperoxidase (MPO) assessment. Serum cytokines (TNF-α, IL-6 and IL-10) and MPO activities were significantly increased, and significant histopathological changes in the organs were observed by LPS challenge. These findings were significantly attenuated by PC or HC. The treatment with PC or HC resulted in a significant attenuation on the increase in serum levels of TNF-α and IL-6, pro-inflammatory cytokines, while neither PC nor HC significantly attenuated serum levels of IL-10, anti-inflammatory cytokine. In the organs, the enhanced infiltration of neutrophils and expression of ED2 positive macrophage were attenuated by PC or HC. Inductions of MPO activity were also significantly attenuated by PC or HC. From the findings, we suggest that PC may be a functional material for its use as an anti-inflammatory agent.
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Affiliation(s)
- Yoon Yang Jung
- Department of Pathology, College of Medicine, Chung-Ang University, Seoul 156-756, Korea
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29
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Millet A, Pederzoli-Ribeil M, Guillevin L, Witko-Sarsat V, Mouthon L. Antineutrophil cytoplasmic antibody-associated vasculitides: is it time to split up the group? Ann Rheum Dis 2013; 72:1273-9. [PMID: 23606701 DOI: 10.1136/annrheumdis-2013-203255] [Citation(s) in RCA: 100] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Antineutrophil cytoplasmic antibody (ANCA)-associated vasculitides are a heterogeneous group of diseases corresponding to necrotising inflammation of small vessels with a wide range of clinical presentations. At least two of the diseases are believed to exhibit a common ground of pathophysiological mechanisms. These are granulomatosis with polyangiitis (GPA, formerly known as Wegener's granulomatosis) and microscopic polyangiitis (MPA). ANCA directed against proteinase 3 (PR3) are preferentially associated with GPA, and anti-myeloperoxidase (MPO) ANCA are associated mainly with MPA and eosinophilic GPA (formerly known as Churg-Strauss syndrome). Anti-MPO and anti-PR3 antibodies can activate neutrophils in vitro. In vivo data are available for humans and mice on the pathogenicity of anti-MPO but it is more controversial for PR3-ANCA. A recent genome-wide association study of patients with ANCA-associated vasculitides confirmed the genetic contribution to the pathogenesis of these conditions, with significant association of PR3-ANCA and human leukocyte antigen-DP and the genes encoding α1-antitrypsin and PR3. MPO-ANCA were significantly associated with human leukocyte antigen-DQ. Thus, recent results from epidemiological studies, genome-wide association study and therapeutic trials have suggested that these entities are, in fact, distinct. We have summarised these results and discuss the idea that these two entities should be studied separately as the nature of the two auto-antigens suggests at a molecular level despite shared ANCA involvement.
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30
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Liu L, Xie S, Liao X, Zhang L, Zhong L. Netrin-1 pretreatment protects rat kidney against ischemia/reperfusion injury via suppression of oxidative stress and neuropeptide Y expression. J Biochem Mol Toxicol 2013; 27:231-6. [PMID: 23335440 DOI: 10.1002/jbt.21474] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2012] [Revised: 12/04/2012] [Accepted: 12/19/2012] [Indexed: 11/09/2022]
Abstract
Netrin-1 has been found to protect kidneys from ischemia/reperfusion injury. In this study, we aimed to address whether the protective effects were mediated through suppression of oxidative stress and neuropeptide Y. Compared to sham-operated animals, animals after ischemia/reperfusion showed marked kidney damage and significantly increased levels of serum creatinine, blood urea nitrogen, malondialdehyde, and neuropeptide Y. Renal myeloperoxidase activity was elevated in animals with ischemia/reperfusion relative to sham-operated animals, whereas renal superoxide dismutase activity was reduced. Netrin-1 pretreatment attenuated ischemia/reperfusion-induced functional and pathological changes in the kidney. Moreover, the ischemia/reperfusion-induced changes in the oxidative stress biomarkers and neuropeptide Y were significantly counteracted by prior administration of netrin-1. Taken together, our data showed that netrin-1 pretreatment prevented renal ischemia/reperfusion injury, at least partially through reduction of oxidative stress and neuropeptide Y expression.
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Affiliation(s)
- Ling Liu
- Department of Nephrology, Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, People's Republic of China
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31
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Wauters J, Pille F, Martens A, Franck T, Serteyn D, Gasthuys F, Meyer E. Equine myeloperoxidase: A novel biomarker in synovial fluid for the diagnosis of infection. Equine Vet J 2012; 45:278-83. [DOI: 10.1111/j.2042-3306.2012.00682.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2012] [Accepted: 07/23/2012] [Indexed: 11/29/2022]
Affiliation(s)
- J. Wauters
- Department of Pharmacology, Toxicology and Biochemistry; Faculty of Veterinary Medicine; Ghent University; Belgium
| | - F. Pille
- Department of Surgery and Anaesthesiology of Domestic Animals; Faculty of Veterinary Medicine; Ghent University; Belgium
| | - A. Martens
- Department of Surgery and Anaesthesiology of Domestic Animals; Faculty of Veterinary Medicine; Ghent University; Belgium
| | - T. Franck
- Department of Large Animal Surgery; Centre for Oxygen Research and Development; University of Liège; Belgium
| | - D. Serteyn
- Department of Large Animal Surgery; Centre for Oxygen Research and Development; University of Liège; Belgium
| | - F. Gasthuys
- Department of Surgery and Anaesthesiology of Domestic Animals; Faculty of Veterinary Medicine; Ghent University; Belgium
| | - E. Meyer
- Department of Pharmacology, Toxicology and Biochemistry; Faculty of Veterinary Medicine; Ghent University; Belgium
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32
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Lande R, Ganguly D, Facchinetti V, Frasca L, Conrad C, Gregorio J, Meller S, Chamilos G, Sebasigari R, Riccieri V, Bassett R, Amuro H, Fukuhara S, Ito T, Liu YJ, Gilliet M. Neutrophils activate plasmacytoid dendritic cells by releasing self-DNA-peptide complexes in systemic lupus erythematosus. Sci Transl Med 2011; 3:73ra19. [PMID: 21389263 DOI: 10.1126/scitranslmed.3001180] [Citation(s) in RCA: 933] [Impact Index Per Article: 71.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Systemic lupus erythematosus (SLE) is a severe and incurable autoimmune disease characterized by chronic activation of plasmacytoid dendritic cells (pDCs) and production of autoantibodies against nuclear self-antigens by hyperreactive B cells. Neutrophils are also implicated in disease pathogenesis; however, the mechanisms involved are unknown. Here, we identified in the sera of SLE patients immunogenic complexes composed of neutrophil-derived antimicrobial peptides and self-DNA. These complexes were produced by activated neutrophils in the form of web-like structures known as neutrophil extracellular traps (NETs) and efficiently triggered innate pDC activation via Toll-like receptor 9 (TLR9). SLE patients were found to develop autoantibodies to both the self-DNA and antimicrobial peptides in NETs, indicating that these complexes could also serve as autoantigens to trigger B cell activation. Circulating neutrophils from SLE patients released more NETs than those from healthy donors; this was further stimulated by the antimicrobial autoantibodies, suggesting a mechanism for the chronic release of immunogenic complexes in SLE. Our data establish a link between neutrophils, pDC activation, and autoimmunity in SLE, providing new potential targets for the treatment of this devastating disease.
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Affiliation(s)
- Roberto Lande
- Department of Immunology, University of Texas M. D. Anderson Cancer Center, Houston, TX 77030, USA
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Metzler KD, Fuchs TA, Nauseef WM, Reumaux D, Roesler J, Schulze I, Wahn V, Papayannopoulos V, Zychlinsky A. Myeloperoxidase is required for neutrophil extracellular trap formation: implications for innate immunity. Blood 2011; 117:953-9. [PMID: 20974672 PMCID: PMC3035083 DOI: 10.1182/blood-2010-06-290171] [Citation(s) in RCA: 521] [Impact Index Per Article: 40.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2010] [Accepted: 10/13/2010] [Indexed: 12/25/2022] Open
Abstract
The granule enzyme myeloperoxidase (MPO) plays an important role in neutrophil antimicrobial responses. However, the severity of immunodeficiency in patients carrying mutations in MPO is variable. Serious microbial infections, especially with Candida species, have been observed in a subset of completely MPO-deficient patients. Here we show that neutrophils from donors who are completely deficient in MPO fail to form neutrophil extracellular traps (NETs), indicating that MPO is required for NET formation. In contrast, neutrophils from partially MPO-deficient donors make NETs, and pharmacological inhibition of MPO only delays and reduces NET formation. Extracellular products of MPO do not rescue NET formation, suggesting that MPO acts cell-autonomously. Finally, NET-dependent inhibition of Candida albicans growth is compromised in MPO-deficient neutrophils. The inability to form NETs may contribute in part to the host defense defects observed in completely MPO-deficient individuals.
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Affiliation(s)
- Kathleen D Metzler
- Department of Cellular Microbiology, Max Planck Institute for Infection Biology, Berlin, Germany
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34
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Gutiérrez-Salinas J, Morales-González JA, Madrigal-Santillán E, Esquivel-Soto J, Esquivel-Chirino C, González-Rubio MGLY, Suástegui-Domínguez S, Valadez-Vega C. Exposure to sodium fluoride produces signs of apoptosis in rat leukocytes. Int J Mol Sci 2010; 11:3610-22. [PMID: 20957113 PMCID: PMC2956113 DOI: 10.3390/ijms11093610] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2010] [Revised: 09/03/2010] [Accepted: 09/20/2010] [Indexed: 02/07/2023] Open
Abstract
Fluoride is naturally present in the earth's crust and can be found in rocks, coal, and clay; thus, it can be found in small quantities in water, air, plants, and animals. Therefore, humans are exposed to fluoride through food, drinking water, and in the air they breathe. Flouride is essential to maintain bone strength and to protect against dental decay, but if it is absorbed too frequently, it can cause tooth decay, osteoporosis, and damage to kidneys, bones, nerves, and muscles. Therefore, the present work was aimed at determining the effect of intake of sodium fluoride (NaF) as an apoptosis inducer in leukocytes of rats treated for eight weeks with 1 or 50 parts per million (ppm) NaF. Expression of p53, bcl-2, and caspade-3 were used as apoptotic and general metabolism indicators of leukocyte-like indicators of the (INT) oxidation system. Male rats were exposed to NaF (1 and 500 ppm) for eight weeks, and then sacrificed weekly to obtain blood samples. Expression of p53, bcl-2, and caspase-3 were determined in leukocytes by Western blot, and general metabolism of leukocytes was analyzed with a commercial kit. We found changes in the expression of the proteins described, especially when the animals received 50 ppm of NaF. These results indicate that NaF intoxication can be an apoptosis inducer in rat leukocytes treated with the compound for eight weeks.
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Affiliation(s)
- José Gutiérrez-Salinas
- Laboratorio de Bioquímica y Medicina Experimental, División de Investigación Biomédica, Centro Médico Nacional “20 de Noviembre”, ISSSTE, México, D.F., México
| | - José A. Morales-González
- Área Académica de Medicina Instituto de Ciencias de la Salud, Universidad Autónoma del Estado de Hidalgo, Ex-Hacienda de la Concepción, Tilcuautla, 42080 Pachuca de Soto, Hgo., México; E-Mails: (J.A.M-G); (E.M.-S.); (C.V.-V.)
| | - Eduardo Madrigal-Santillán
- Área Académica de Medicina Instituto de Ciencias de la Salud, Universidad Autónoma del Estado de Hidalgo, Ex-Hacienda de la Concepción, Tilcuautla, 42080 Pachuca de Soto, Hgo., México; E-Mails: (J.A.M-G); (E.M.-S.); (C.V.-V.)
| | - Jaime Esquivel-Soto
- Facultad de Odontologia, Universidad Nacional Autónoma de México (UNAM), México, D.F., México; E-Mails: (J.E.-S.); (C.E.-C.)
| | - César Esquivel-Chirino
- Facultad de Odontologia, Universidad Nacional Autónoma de México (UNAM), México, D.F., México; E-Mails: (J.E.-S.); (C.E.-C.)
| | | | - Sigrit Suástegui-Domínguez
- Laboratorio de Bioquímica y Medicina Experimental, División de Investigación Biomédica, Centro Médico Nacional “20 de Noviembre”, ISSSTE, México, D.F., México
| | - Carmen Valadez-Vega
- Área Académica de Medicina Instituto de Ciencias de la Salud, Universidad Autónoma del Estado de Hidalgo, Ex-Hacienda de la Concepción, Tilcuautla, 42080 Pachuca de Soto, Hgo., México; E-Mails: (J.A.M-G); (E.M.-S.); (C.V.-V.)
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35
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van der Veen BS, de Winther MPJ, Heeringa P. Myeloperoxidase: molecular mechanisms of action and their relevance to human health and disease. Antioxid Redox Signal 2009; 11:2899-937. [PMID: 19622015 DOI: 10.1089/ars.2009.2538] [Citation(s) in RCA: 368] [Impact Index Per Article: 24.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Myeloperoxidase (MPO) is a heme-containing peroxidase abundantly expressed in neutrophils and to a lesser extent in monocytes. Enzymatically active MPO, together with hydrogen peroxide and chloride, produces the powerful oxidant hypochlorous acid and is a key contributor to the oxygen-dependent microbicidal activity of phagocytes. In addition, excessive generation of MPO-derived oxidants has been linked to tissue damage in many diseases, especially those characterized by acute or chronic inflammation. It has become increasingly clear that MPO exerts effects that are beyond its oxidative properties. These properties of MPO are, in many cases, independent of its catalytic activity and affect various processes involved in cell signaling and cell-cell interactions and are, as such, capable of modulating inflammatory responses. Given these diverse effects, an increased interest has emerged in the role of MPO and its downstream products in a wide range of inflammatory diseases. In this article, our knowledge pertaining to the biologic role of MPO and its downstream effects and mechanisms of action in health and disease is reviewed and discussed.
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Affiliation(s)
- Betty S van der Veen
- Department of Pathology and Medical Biology, University Medical Center Groningen, University of Groningen , Groningen, the Netherlands
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36
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37
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Kallenberg CGM, Heeringa P, Stegeman CA. Mechanisms of Disease: pathogenesis and treatment of ANCA-associated vasculitides. ACTA ACUST UNITED AC 2007; 2:661-70. [PMID: 17133251 DOI: 10.1038/ncprheum0355] [Citation(s) in RCA: 168] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2006] [Accepted: 10/16/2006] [Indexed: 01/13/2023]
Abstract
Wegener's granulomatosis and microscopic polyangiitis are idiopathic systemic vasculitides strongly associated with antineutrophil cytoplasmic autoantibodies (ANCA). In Wegener's granulomatosis, ANCA are mostly directed against proteinase 3 (PR3), whereas in microscopic polyangiitis ANCA are directed against myeloperoxidase; increases in levels of these autoantibodies precede or coincide with clinical relapses in many cases. In vitro, ANCA can further activate primed neutrophils to release reactive oxygen species and lytic enzymes, and, in conjunction with neutrophils, can damage and lyse endothelial cells. Patients with Wegener's granulomatosis or microscopic polyangiitis have an increased percentage of neutrophils that constitutively express PR3 on their membrane. These neutrophils can be stimulated by ANCA, without priming. In vivo, transfer of splenocytes from myeloperoxidase-deficient mice immunized with mouse myeloperoxidase into wild-type mice resulted in pauci-immune systemic vasculitis. A similar experiment in PR3-deficient mice did not cause significant vasculitic lesions. Together, clinical, in vitro and in vivo experimental data support a pathogenic role for ANCA in Wegener's granulomatosis and microscopic polyangiitis, although this role is more evident for myeloperoxidase-specific ANCA than for PR3-specific ANCA. Several controlled trials have led to an evidence-based approach for the treatment of ANCA-associated vasculitis, and further studies, based on new insights into pathogenesis, are in progress.
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Affiliation(s)
- Cees G M Kallenberg
- Department of Rheumatology and Clinical Immunology, University Medical Center, University of Groningen, 9700 RB Groningen, The Netherlands.
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Guilpain P, Servettaz A, Goulvestre C, Barrieu S, Borderie D, Chéreau C, Kavian N, Pagnoux C, Guillevin L, Weill B, Mouthon L, Batteux F. Pathogenic effects of antimyeloperoxidase antibodies in patients with microscopic polyangiitis. ACTA ACUST UNITED AC 2007; 56:2455-63. [PMID: 17599755 DOI: 10.1002/art.22741] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
OBJECTIVE Microscopic polyangiitis (MPA) is a small-vessel vasculitis associated with antimyeloperoxidase (MPO) antibodies in 70% of patients. Anti-MPO antibodies can trigger the release of MPO by neutrophils and monocytes, but their involvement in the pathogenesis of MPA is still questioned. The aim of this study was to investigate whether anti-MPO antibodies can activate MPO to generate an oxidative stress that is potentially deleterious to the endothelium. METHODS MPA sera, purified IgG from MPA sera, normal control sera, and purified IgG from normal sera were incubated with MPO coated onto microtitration plates. The peroxidase activity of MPO was evaluated by adding o-phenylenediamine. Production of hypochlorous acid (HOCl) was determined by chemiluminescence. The cytotoxic properties of byproducts of MPO activation were tested on endothelial cells in culture. RESULTS MPA sera with anti-MPO antibodies were found to activate MPO in vitro (P < 0.0001 versus normal sera) and to generate HOCl (P < 0.001), as did IgG purified from MPA sera (P < 0.05). MPA sera without anti-MPO antibodies and MPA IgG absorbed on MPO did not show these activities. The byproducts of MPO activation by MPA sera exerted a strong cytolytic activity on endothelial cells in culture (P < 0.01). Both HOCl production and endothelial lysis were abrogated by N-acetylcysteine (NAC), an antioxidant molecule (P < 0.05 and P < 0.0001, respectively). CONCLUSION Anti-MPO antibodies could play a pathogenic role in vivo by triggering an oxidative burst, leading to severe endothelial damage. Treatment of MPA patients with NAC might be proposed in an attempt to abrogate these deleterious phenomena.
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Affiliation(s)
- Philippe Guilpain
- Université Paris Descartes, Hôpital Cochin, Assistance Publique Hôpitaux de Paris, Paris, France
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Morgan MD, Harper L, Williams J, Savage C. Anti-neutrophil cytoplasm-associated glomerulonephritis. J Am Soc Nephrol 2006; 17:1224-34. [PMID: 16624931 DOI: 10.1681/asn.2005080882] [Citation(s) in RCA: 95] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
Wegener's granulomatosis, microscopic polyangiitis, and renal limited vasculitis are associated with circulating anti-neutrophil cytoplasm antibodies and are an important cause of rapidly progressive glomerulonephritis. This review gives an account of recent advances in the understanding of the pathogenesis underlying these conditions and how these may lead to future treatments. Consideration is given to recent clinical trials in the management of anti-neutrophil cytoplasm antibodies (ANCA)-associated vasculitides.
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Affiliation(s)
- Matthew David Morgan
- Division of Immunity and Infection, The Medical School, University of Birmingham, Vincent Drive, Birmingham, United Kingdom
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Huugen D, Xiao H, van Esch A, Falk RJ, Peutz-Kootstra CJ, Buurman WA, Tervaert JWC, Jennette JC, Heeringa P. Aggravation of anti-myeloperoxidase antibody-induced glomerulonephritis by bacterial lipopolysaccharide: role of tumor necrosis factor-alpha. THE AMERICAN JOURNAL OF PATHOLOGY 2005; 167:47-58. [PMID: 15972951 PMCID: PMC1603449 DOI: 10.1016/s0002-9440(10)62952-5] [Citation(s) in RCA: 188] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Wegener's granulomatosis, microscopic polyangiitis, Churg-Strauss syndrome, and idiopathic pauci-immune necrotizing crescentic glomerulonephritis are associated with myeloperoxidase (MPO)-specific anti-neutrophil cytoplasmic autoantibodies (ANCAs). Clinical and experimental evidence indicates that ANCA and proinflammatory stimuli of infectious origin act synergistically to cause vasculitis. We tested this hypothesis in a recently developed mouse model of anti-MPO IgG-induced glomerulonephritis by using bacterial lipopolysaccharide (LPS) as the proinflammatory stimulus. Systemic administration of LPS dose dependently increased renal injury induced by anti-MPO IgG as demonstrated by increased glomerular crescent formation and glomerular necrosis. In the early phase, LPS enhanced anti-MPO IgG-induced glomerular neutrophil accumulation. Furthermore, a transient induction of circulating tumor necrosis factor (TNF)-alpha levels, followed by a marked increase in circulating MPO levels, was observed on administration of LPS. In vitro, anti-MPO IgG induced a respiratory burst in murine neutrophils only after priming with TNF-alpha. Finally, anti-TNF-alpha treatment attenuated, but did not prevent, the LPS-mediated aggravation of anti-MPO IgG-induced glomerulonephritis. In conclusion, our study demonstrates that ANCA and proinflammatory stimuli act synergistically to induce vasculitic disease and suggests potential benefits of inhibiting TNF-alpha bioactivity in treating human ANCA-associated necrotizing crescentic glomerulonephritis.
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Affiliation(s)
- Dennis Huugen
- Department of Clinical and Experimental Immunology, Cardiovascular Research Institute Maastricht, University Maastricht, PO Box 616, 6200 MD Maastricht, The Netherlands
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Abstract
Neutrophilic polymorphonuclear leukocytes (neutrophils) are highly specialized for their primary function, the phagocytosis and destruction of microorganisms. When coated with opsonins (generally complement and/or antibody), microorganisms bind to specific receptors on the surface of the phagocyte and invagination of the cell membrane occurs with the incorporation of the microorganism into an intracellular phagosome. There follows a burst of oxygen consumption, and much, if not all, of the extra oxygen consumed is converted to highly reactive oxygen species. In addition, the cytoplasmic granules discharge their contents into the phagosome, and death of the ingested microorganism soon follows. Among the antimicrobial systems formed in the phagosome is one consisting of myeloperoxidase (MPO), released into the phagosome during the degranulation process, hydrogen peroxide (H2O2), formed by the respiratory burst and a halide, particularly chloride. The initial product of the MPO-H2O2-chloride system is hypochlorous acid, and subsequent formation of chlorine, chloramines, hydroxyl radicals, singlet oxygen, and ozone has been proposed. These same toxic agents can be released to the outside of the cell, where they may attack normal tissue and thus contribute to the pathogenesis of disease. This review will consider the potential sources of H2O2 for the MPO-H2O2-halide system; the toxic products of the MPO system; the evidence for MPO involvement in the microbicidal activity of neutrophils; the involvement of MPO-independent antimicrobial systems; and the role of the MPO system in tissue injury. It is concluded that the MPO system plays an important role in the microbicidal activity of phagocytes.
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Affiliation(s)
- Seymour J Klebanoff
- Department of Medicine, University of Washington School of Medicine, Seattle, WA 98195-7185, USA.
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Reumaux D, Duthilleul P, Roos D. Pathogenesis of diseases associated with antineutrophil cytoplasm autoantibodies. Hum Immunol 2004; 65:1-12. [PMID: 14700590 DOI: 10.1016/j.humimm.2003.09.013] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Little is known about the etiologies of diseases associated with circulating antineutrophil cytoplasm autoantibodies (ANCA), such as primary vasculitides and inflammatory bowel diseases. However, the understanding of immune mechanisms supposedly involved in the pathogenesis of these diseases is still growing. In the present review, we first focus on the mechanisms triggering the development of ANCA, including the potential role of microbial superantigens and the possible defect(s) in the progression of apoptosis or in the removal of apoptotic cells. We next concentrate on the contribution of ANCA to the clinical symptoms and on the pathogenic role of ANCA, including the accessibility of ANCA antigens as targets for circulating antibodies and the mode of action of ANCA. Mechanisms of neutrophil activation by ANCA include the engagement of Fcgamma receptors, the possible mechanisms of neutrophil-mediated tissue damage, and the neutrophil-endothelial interaction.
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Affiliation(s)
- Dominique Reumaux
- Département d'Hématologie-Immunologie-Cytogénétique, Centre Hospitalier de Valenciennes, Valenciennes, France.
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