1
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Tran N, Mills EL. Redox regulation of macrophages. Redox Biol 2024; 72:103123. [PMID: 38615489 PMCID: PMC11026845 DOI: 10.1016/j.redox.2024.103123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2024] [Revised: 02/26/2024] [Accepted: 03/11/2024] [Indexed: 04/16/2024] Open
Abstract
Redox signaling, a mode of signal transduction that involves the transfer of electrons from a nucleophilic to electrophilic molecule, has emerged as an essential regulator of inflammatory macrophages. Redox reactions are driven by reactive oxygen/nitrogen species (ROS and RNS) and redox-sensitive metabolites such as fumarate and itaconate, which can post-translationally modify specific cysteine residues in target proteins. In the past decade our understanding of how ROS, RNS, and redox-sensitive metabolites control macrophage function has expanded dramatically. In this review, we discuss the latest evidence of how ROS, RNS, and metabolites regulate macrophage function and how this is dysregulated with disease. We highlight the key tools to assess redox signaling and important questions that remain.
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Affiliation(s)
- Nhien Tran
- Department of Cancer Immunology and Virology, Dana-Farber Cancer Institute, Boston, MA, USA; Department of Immunology, Harvard Medical School, Boston, MA, USA
| | - Evanna L Mills
- Department of Cancer Immunology and Virology, Dana-Farber Cancer Institute, Boston, MA, USA; Department of Immunology, Harvard Medical School, Boston, MA, USA.
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2
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Uribe-Querol E, Rosales C. Neutrophils versus Protozoan Parasites: Plasmodium, Trichomonas, Leishmania, Trypanosoma, and Entameoba. Microorganisms 2024; 12:827. [PMID: 38674770 PMCID: PMC11051968 DOI: 10.3390/microorganisms12040827] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2024] [Revised: 04/04/2024] [Accepted: 04/17/2024] [Indexed: 04/28/2024] Open
Abstract
Neutrophils are the most abundant polymorphonuclear granular leukocytes in human blood and are an essential part of the innate immune system. Neutrophils are efficient cells that eliminate pathogenic bacteria and fungi, but their role in dealing with protozoan parasitic infections remains controversial. At sites of protozoan parasite infections, a large number of infiltrating neutrophils is observed, suggesting that neutrophils are important cells for controlling the infection. Yet, in most cases, there is also a strong inflammatory response that can provoke tissue damage. Diseases like malaria, trichomoniasis, leishmaniasis, Chagas disease, and amoebiasis affect millions of people globally. In this review, we summarize these protozoan diseases and describe the novel view on how neutrophils are involved in protection from these parasites. Also, we present recent evidence that neutrophils play a double role in these infections participating both in control of the parasite and in the pathogenesis of the disease.
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Affiliation(s)
- Eileen Uribe-Querol
- Laboratorio de Biología del Desarrollo, División de Estudios de Posgrado e Investigación, Facultad de Odontología, Universidad Nacional Autónoma de México, Mexico City 04510, Mexico
| | - Carlos Rosales
- Departamento de Inmunología, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Mexico City 04510, Mexico
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3
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Abstract
The amoeba parasite Entamoeba histolytica is the causative agent of human amebiasis, an enteropathic disease affecting millions of people worldwide. This ancient protozoan is an elementary example of how parasites evolve with humans, e.g. taking advantage of multiple mechanisms to evade immune responses, interacting with microbiota for nutritional and protective needs, utilizing host resources for growth, division, and encystation. These skills of E. histolytica perpetuate the species and incidence of infection. However, in 10% of infected cases, the parasite turns into a pathogen; the host-parasite equilibrium is then disorganized, and the simple lifecycle based on two cell forms, trophozoites and cysts, becomes unbalanced. Trophozoites acquire a virulent phenotype which, when non-controlled, leads to intestinal invasion with the onset of amoebiasis symptoms. Virulent E. histolytica must cross mucus, epithelium, connective tissue and possibly blood. This highly mobile parasite faces various stresses and a powerful host immune response, with oxidative stress being a challenge for its survival. New emerging research avenues and omics technologies target gene regulation to determine human or parasitic factors activated upon infection, their role in virulence activation, and in pathogenesis; this research bears in mind that E. histolytica is a resident of the complex intestinal ecosystem. The goal is to eradicate amoebiasis from the planet, but the parasitic life of E. histolytica is ancient and complex and will likely continue to evolve with humans. Advances in these topics are summarized here.
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Affiliation(s)
- Nancy Guillén
- Cell Biology and Infection Department, Institut Pasteur and Centre National de la Recherche Scientifique CNRS-ERM9195, Paris, France
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4
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Lee YA, Shin MH. Involvement of NOX2-derived ROS in human hepatoma HepG2 cell death induced by Entamoeba histolytica. PARASITES, HOSTS AND DISEASES 2023; 61:388-396. [PMID: 38043534 PMCID: PMC10693973 DOI: 10.3347/phd.23094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Accepted: 11/02/2023] [Indexed: 12/05/2023]
Abstract
Entamoeba histolytica is an enteric tissue-invasive protozoan parasite causing amoebic colitis and liver abscesses in humans. Amoebic contact with host cells activates intracellular signaling pathways that lead to host cell death via generation of caspase-3, calpain, Ca2+ elevation, and reactive oxygen species (ROS). We previously reported that various NADPH oxidases (NOXs) are responsible for ROS-dependent death of various host cells induced by amoeba. In the present study, we investigated the specific NOX isoform involved in ROS-dependent death of hepatocytes induced by amoebas. Co-incubation of hepatoma HepG2 cells with live amoebic trophozoites resulted in remarkably increased DNA fragmentation compared to cells incubated with medium alone. HepG2 cells that adhered to amoebic trophozoites showed strong dichlorodihydrofluorescein diacetate (DCF-DA) fluorescence, suggesting intracellular ROS accumulation within host cells stimulated by amoebic trophozoites. Pretreatment of HepG2 cells with the general NOX inhibitor DPI or NOX2-specific inhibitor GSK 2795039 reduced Entamoeba-induced ROS generation. Similarly, Entamoeba-induced LDH release from HepG2 cells was effectively inhibited by pretreatment with DPI or GSK 2795039. In NOX2-silenced HepG2 cells, Entamoeba-induced LDH release was also significantly inhibited compared with controls. Taken together, the results support an important role of NOX2-derived ROS in hepatocyte death induced by E. histolytica.
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Affiliation(s)
- Young Ah Lee
- Department of Tropical Medicine and Institute of Tropical Medicine, Yonsei University College of Medicine, Seoul 03722,
Korea
| | - Myeong Heon Shin
- Department of Tropical Medicine and Institute of Tropical Medicine, Yonsei University College of Medicine, Seoul 03722,
Korea
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5
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Lee YA, Sim S, Kim KA, Shin MH. Signaling Role of NADPH Oxidases in ROS-Dependent Host Cell Death Induced by Pathogenic Entamoeba histolytica. THE KOREAN JOURNAL OF PARASITOLOGY 2022; 60:155-161. [PMID: 35772733 PMCID: PMC9256287 DOI: 10.3347/kjp.2022.60.3.155] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Accepted: 06/07/2022] [Indexed: 11/23/2022]
Abstract
All living organisms are destined to die. Cells, the core of those living creatures, move toward the irresistible direction of death. The question of how to die is critical and is very interesting. There are various types of death in life, including natural death, accidental death, questionable death, suicide, and homicide. The mechanisms and molecules involved in cell death also differ depending on the type of death. The dysenteric amoeba, E. histolytica, designated by the German zoologist Fritz Schaudinn in 1903, has the meaning of tissue lysis; i.e., tissue destroying, in its name. It was initially thought that the amoebae lyse tissue very quickly leading to cell death called necrosis. However, advances in measuring cell death have allowed us to more clearly investigate the various forms of cell death induced by amoeba. Increasing evidence has shown that E. histolytica can cause host cell death through induction of various intracellular signaling pathways. Understanding of the mechanisms and signaling molecules involved in host cell death induced by amoeba can provide new insights on the tissue pathology and parasitism in human amoebiasis. In this review, we emphasized on the signaling role of NADPH oxidases in reactive oxygen species (ROS)-dependent cell death by pathogenic E. histolytica.
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Affiliation(s)
- Young Ah Lee
- Department of Environmental Medical Biology, Yonsei University, Seoul 03722,
Korea
- Institue of Tropical Medicine, College of Medicine, Yonsei University, Seoul 03722,
Korea
| | - Seobo Sim
- KU Open Innovation Center, Department of Environmental and Tropical Medicine, School of Medicine, Konkuk University, Chungju 27478,
Korea
| | - Kyeong Ah Kim
- Gachon Biomedical & Convergence Institute, Gil Medical Center, Gachon University College of Medicine, Incheon 21565,
Korea
| | - Myeong Heon Shin
- Department of Environmental Medical Biology, Yonsei University, Seoul 03722,
Korea
- Institue of Tropical Medicine, College of Medicine, Yonsei University, Seoul 03722,
Korea
- Corresponding author ()
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6
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Comparative transcriptome profiling of virulent and avirulent isolates of Neoparamoeba perurans. Sci Rep 2022; 12:5860. [PMID: 35393457 PMCID: PMC8989968 DOI: 10.1038/s41598-022-09806-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Accepted: 03/22/2022] [Indexed: 12/03/2022] Open
Abstract
Neoparamoeba perurans, the aetiological agent of amoebic gill disease, remains a persistent threat to Atlantic salmon mariculture operations worldwide. Innovation in methods of AGD control is required yet constrained by a limited understanding of the mechanisms of amoebic gill disease pathogenesis. In the current study, a comparative transcriptome analysis of two N. perurans isolates of contrasting virulence phenotypes is presented using gill-associated, virulent (wild type) isolates, and in vitro cultured, avirulent (clonal) isolates. Differential gene expression analysis identified a total of 21,198 differentially expressed genes between the wild type and clonal isolates, with 5674 of these genes upregulated in wild type N. perurans. Gene set enrichment analysis predicted gene sets enriched in the wild type isolates including, although not limited to, cortical actin cytoskeleton, pseudopodia, phagocytosis, macropinocytic cup, and fatty acid beta-oxidation. Combined, the results from these analyses suggest that upregulated gene expression associated with lipid metabolism, oxidative stress response, protease activity, and cytoskeleton reorganisation is linked to pathogenicity in wild type N. perurans. These findings provide a foundation for future AGD research and the development of novel therapeutic and prophylactic AGD control measures for commercial aquaculture.
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da Silva Castro A, Angeloni MB, de Freitas Barbosa B, de Miranda RL, Teixeira SC, Guirelli PM, de Oliveira FC, José da Silva R, Franco PS, Ribeiro M, Milian ICB, de Oliveira Gomes A, Ietta F, Júnior SF, Mineo TWP, Mineo JR, de Oliveira Simões Alves CM, Ferro EAV. BEWO trophoblast cells and Toxoplasma gondii infection modulate cell death mechanisms in THP-1 monocyte cells by interference in the expression of death receptor and intracellular proteins. Tissue Cell 2021; 73:101658. [PMID: 34597888 DOI: 10.1016/j.tice.2021.101658] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Revised: 09/20/2021] [Accepted: 09/23/2021] [Indexed: 02/07/2023]
Abstract
Crosstalk between trophoblast and monocytes is essential for gestational success, and it can be compromised in congenital toxoplasmosis. Cell death is one of the mechanisms involved in the maintenance of pregnancy, and this study aimed to evaluate the role of trophoblast in the modulation of monocyte cell death in the presence or absence of Toxoplasma gondii infection. THP-1 cells were stimulated with supernatants of BeWo cells and then infected or not with T. gondii. The supernatants were collected and analyzed for the secretion of human Fas ligand, and cells were used to determine cell death and apoptosis, cell death receptor, and intracellular proteins expression. Cell death and apoptosis index were higher in uninfected THP-1 cells stimulated with supernatants of BeWo cells; however, apoptosis index was reduced by T. gondii infection. Macrophage migration inhibitory factor (MIF) and transforming growth factor (TGF)-β1, secreted by BeWo cells, altered the cell death and apoptosis rates in THP-1 cells. In infected THP-1 cells, the expression of Fas/CD95 and secretion of FasL was significantly higher; however, caspase 3 and phosphorylated extracellular-signal-regulated kinase (ERK1/2) were downregulated. Results suggest that soluble factors secreted by BeWo cells induce cell death and apoptosis in THP-1 cells, and Fas/CD95 can be involved in this process. On the other hand, T. gondii interferes in the mechanism of cell death and inhibits THP-1 cell apoptosis, which can be associated with active caspase 3 and phosphorylated ERK1/2. In conclusion, our results showed that human BeWo trophoblast cells and T. gondii infection modulate cell death in human THP-1 monocyte cells.
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Affiliation(s)
- Andressa da Silva Castro
- Laboratory of Immunophysiology of Reproduction, Institute of Biomedical Sciences, Federal University of Uberlândia, MG, Brazil
| | - Mariana Bodini Angeloni
- School of Medicine, Healthy Sciences Special Academic Unit, University of Goiás-Jataí, Jataí, GO, Brazil
| | - Bellisa de Freitas Barbosa
- Laboratory of Immunophysiology of Reproduction, Institute of Biomedical Sciences, Federal University of Uberlândia, MG, Brazil
| | - Renata Lima de Miranda
- Laboratory of Immunophysiology of Reproduction, Institute of Biomedical Sciences, Federal University of Uberlândia, MG, Brazil
| | - Samuel Cota Teixeira
- Laboratory of Immunophysiology of Reproduction, Institute of Biomedical Sciences, Federal University of Uberlândia, MG, Brazil
| | - Pâmela Mendonça Guirelli
- Laboratory of Immunophysiology of Reproduction, Institute of Biomedical Sciences, Federal University of Uberlândia, MG, Brazil
| | - Fernanda Chaves de Oliveira
- Laboratory of Immunophysiology of Reproduction, Institute of Biomedical Sciences, Federal University of Uberlândia, MG, Brazil
| | - Rafaela José da Silva
- Laboratory of Immunophysiology of Reproduction, Institute of Biomedical Sciences, Federal University of Uberlândia, MG, Brazil
| | - Priscila Silva Franco
- Laboratory of Immunophysiology of Reproduction, Institute of Biomedical Sciences, Federal University of Uberlândia, MG, Brazil
| | - Mayara Ribeiro
- Laboratory of Immunophysiology of Reproduction, Institute of Biomedical Sciences, Federal University of Uberlândia, MG, Brazil
| | - Iliana Claudia Balga Milian
- Laboratory of Immunophysiology of Reproduction, Institute of Biomedical Sciences, Federal University of Uberlândia, MG, Brazil
| | - Angélica de Oliveira Gomes
- Laboratory of Cell Biology, Institute of Biological and Natural Sciences, Federal University of Triângulo Mineiro, Uberaba, MG, Brazil
| | - Francesca Ietta
- Department of Life Science, University of Siena, Siena, Italy
| | | | - Tiago Wilson Patriarca Mineo
- Laboratory of Immunoparasitology, Institute of Biomedical Sciences, Federal University of Uberlandia, Uberlândia, MG, Brazil
| | - José Roberto Mineo
- Laboratory of Immunoparasitology, Institute of Biomedical Sciences, Federal University of Uberlandia, Uberlândia, MG, Brazil
| | | | - Eloisa Amália Vieira Ferro
- Laboratory of Immunophysiology of Reproduction, Institute of Biomedical Sciences, Federal University of Uberlândia, MG, Brazil.
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8
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Desure S, Mallika A, Roy M, Jyoti A, Kaushik S, Srivastava VK. The flip side of reactive oxygen species in the tropical disease-Amoebiasis. Chem Biol Drug Des 2021; 98:930-942. [PMID: 34519164 DOI: 10.1111/cbdd.13950] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Revised: 08/24/2021] [Accepted: 09/06/2021] [Indexed: 11/30/2022]
Abstract
Entamoeba histolytica is the conductive agent of amoebiasis. Upon the parasite's infection, macrophages and neutrophils are activated by interferon γ, IL-13 and tumour necrosis factor. These immune cells then carry out the amoebicidal activity by releasing nitric oxide synthase and reactive oxygen species (ROS). This review talks about the protective and destructive role of ROS in Eh. E. histolytica has defence strategies against oxidative stress which is a result of excess ROS production. They possess antioxidants for their defence such as L-Cysteine, flavodiiron proteins, peroxiredoxin and trichostatin A, which contribute to the parasite's virulence. The ROS are harmful to the host cells as excess ROS production stimulates cell death by mechanisms like apoptosis and necroptosis. NADPH oxidase (NOX) is a key source of ROS in mammalian cells and causes apoptosis of host cells via the protein kinase transduction pathway. This review provides insights into why NOX inhibitors that could be a potent antiparasitic drug, is not effective for in vivo purposes. This paper also gives an insight into a solution that could be a potent source in generating new treatment and vaccines for amoebiasis by targeting parasite development.
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Affiliation(s)
- Sakshi Desure
- Amity Institute of Biotechnology, Amity University, Jaipur, India
| | - Arya Mallika
- Amity Institute of Biotechnology, Amity University, Jaipur, India
| | - Mrinalini Roy
- Amity Institute of Biotechnology, Amity University, Jaipur, India
| | - Anupam Jyoti
- Faculty of Applied Sciences and Biotechnology, Shoolini University of Biotechnology and Management Sciences, Solan, India
| | - Sanket Kaushik
- Amity Institute of Biotechnology, Amity University, Jaipur, India
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9
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Bosurgi L, Rothlin CV. Management of cell death in parasitic infections. Semin Immunopathol 2021; 43:481-492. [PMID: 34279684 PMCID: PMC8443503 DOI: 10.1007/s00281-021-00875-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Accepted: 05/27/2021] [Indexed: 12/15/2022]
Abstract
For a long time, host cell death during parasitic infection has been considered a reflection of tissue damage, and often associated with disease pathogenesis. However, during their evolution, protozoan and helminth parasites have developed strategies to interfere with cell death so as to spread and survive in the infected host, thereby ascribing a more intriguing role to infection-associated cell death. In this review, we examine the mechanisms used by intracellular and extracellular parasites to respectively inhibit or trigger programmed cell death. We further dissect the role of the prototypical “eat-me signal” phosphatidylserine (PtdSer) which, by being exposed on the cell surface of damaged host cells as well as on some viable parasites via a process of apoptotic mimicry, leads to their recognition and up-take by the neighboring phagocytes. Although barely dissected so far, the engagement of different PtdSer receptors on macrophages, by shaping the host immune response, affects the overall infection outcome in models of both protozoan and helminth infections. In this scenario, further understanding of the molecular and cellular regulation of the PtdSer exposing cell-macrophage interaction might allow the identification of new therapeutic targets for the management of parasitic infection.
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Affiliation(s)
- Lidia Bosurgi
- I. Department of Medicine, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20251, Hamburg, Germany. .,Protozoa Immunology, Bernhard Nocht Institute for Tropical Medicine, Bernhard Nocht Strasse 74, 20359, Hamburg, Germany.
| | - Carla V Rothlin
- Department of Immunobiology and Pharmacology, Yale University, New Haven, CT, USA
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Ahn CS, Kim JG, Kang I, Kong Y. Omega-Class Glutathione Transferases of Carcinogenic Liver Fluke, Clonorchis sinensis, Modulate Apoptosis and Differentiation of Host Cholangiocytes. Antioxidants (Basel) 2021; 10:antiox10071017. [PMID: 34202740 PMCID: PMC8300630 DOI: 10.3390/antiox10071017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 06/19/2021] [Accepted: 06/22/2021] [Indexed: 11/25/2022] Open
Abstract
The small liver fluke Clonorchis sinensis causes hepatobiliary ductal infections in humans. Clonorchiasis is characterized histopathologically by ductal dysplasia, hyperplasia and metaplasia, which closely resembles cholangiocarcinoma (CCA). The disruption of programmed cell death is critical for malignant transformation, while molecular events underlying these phenomena have poorly been understood in clonorchiasis-related CCA tumorigenesis. We incorporated recombinant C. sinensis omega-class glutathione transferase (rCsGSTo) 1 or 2 into human intrahepatic biliary epithelial cells (HIBECs) and analyzed pathophysiological alterations of HIBECs upon the application of oxidative stress. rCsGSTos partially but significantly rescued HIBECs from cell death by inhibiting oxidative stress-induced apoptosis (p < 0.01). rCsGSTos modulated transcriptional levels of numerous genes. We analyzed 13 genes involved in programmed cell death (the upregulation of five antiapoptotic and two apoptotic genes, and the downregulation of one antiapoptotic and five apoptotic genes) and 11 genes associated with cell differentiation (the increase in seven and decrease in four genes) that showed significant modifications (p < 0.05). The induction profiles of the mRNA and proteins of these differentially regulated genes correlated well with each other, and mostly favored apoptotic suppression and/or cell differentiation. We detected increased active, phosphorylated forms of Src, PI3K/Akt, NF-κB p65, MKK3/6 and p38 MAPK, but not JNK and ERK1/2. CsGSTos were localized in the C. sinensis-infected rat cholangiocytes, where cytokeratin 19 was distributed. Our results demonstrated that CsGSTos excreted to the biliary lumen are internalized and accumulated in the host cholangiocytes. When cholangiocytes underwent oxidative stressful condition, CsGSTos appeared to be critically involved in both antiapoptotic process and the differentiation of host cholangiocytes through the regulation of target genes following the activation of responsible signal molecules.
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Affiliation(s)
- Chun-Seob Ahn
- Department of Molecular Parasitology, Samsung Medical Center, School of Medicine, Sungkyunkwan University, Suwon 16419, Korea; (C.-S.A.); (J.-G.K.)
| | - Jeong-Geun Kim
- Department of Molecular Parasitology, Samsung Medical Center, School of Medicine, Sungkyunkwan University, Suwon 16419, Korea; (C.-S.A.); (J.-G.K.)
| | - Insug Kang
- Department of Biochemistry and Molecular Biology, School of Medicine, Kyung Hee University, Seoul 02447, Korea;
| | - Yoon Kong
- Department of Molecular Parasitology, Samsung Medical Center, School of Medicine, Sungkyunkwan University, Suwon 16419, Korea; (C.-S.A.); (J.-G.K.)
- Correspondence: ; Tel.: +82-31-290-6251; Fax: +82-290-6269
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11
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Rosales C. Neutrophils vs. amoebas: Immunity against the protozoan parasite Entamoeba histolytica. J Leukoc Biol 2021; 110:1241-1252. [PMID: 34085314 DOI: 10.1002/jlb.4mr0521-849rr] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Revised: 05/08/2021] [Accepted: 05/10/2021] [Indexed: 12/29/2022] Open
Abstract
Entamoeba histolytica is a protozoan parasite with high prevalence in developing countries, and causes amoebiasis. This disease affects the intestine and the liver, and is the third leading cause of human deaths among parasite infections. E. histolytica infection of the intestine or liver is associated with a strong inflammation characterized by a large number of infiltrating neutrophils. Consequently, several reports suggest that neutrophils play a protective role in amoebiasis. However, other reports indicate that amoebas making direct contact with neutrophils provoke lysis of these leukocytes, resulting in the release of their lytic enzymes, which in turn provoke tissue damage. Therefore, the role of neutrophils in this parasitic infection remains controversial. Neutrophils migrate from the circulation to sites of infection, where they display several antimicrobial functions, including phagocytosis, degranulation, and formation of neutrophil extracellular traps (NET). Recently, it was found that E. histolytica trophozoites are capable of inducing NET formation. Neutrophils in touch with amoebas launched NET in an explosive manner around the amoebas and completely covered them in nebulous DNA and cell aggregates where parasites got immobilized and killed. In addition, the phenotype of neutrophils can be modified by the microbiome resulting in protection against amoebas. This review describes the mechanisms of E. histolytica infection and discusses the novel view of how neutrophils are involved in innate immunity defense against amoebiasis. Also, the mechanisms on how the microbiome modulates neutrophil function are described.
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Affiliation(s)
- Carlos Rosales
- Departamento de Inmunología, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Mexico City, Mexico
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12
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Almayouf MA, El-khadragy M, Awad MA, Alolayan EM. The Effects of Silver Nanoparticles Biosynthesized Using Fig and Olive Extracts on Cutaneous leishmaniasis Induced Inflammation in Female Balb/c Mice. Biosci Rep 2020; 40:BSR20202672. [PMID: 33252120 PMCID: PMC7745064 DOI: 10.1042/bsr20202672] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2020] [Revised: 11/20/2020] [Accepted: 11/24/2020] [Indexed: 12/13/2022] Open
Abstract
Leishmaniasis is a group of infectious and non-contagious severe parasitic diseases, caused by protozoans of the Leishmania genus. Natural products characterize a rich source of prospective chemical entities for the development of new effective drugs for neglected diseases. Scientific evaluation of medicinal plants has made it possible to use some metabolites from flavonoids and polyphenols compounds for the treatment of parasitic diseases. Therefore, we aimed in this study to evaluate the protective effect of Silver nanoparticles (Ag-NPs) biosynthesized using Fig and Olive extracts (NFO) against Cutaneous leishmaniasis in female Balb/c mice. A total of 70 mice were used and divided into seven groups. Treatment was initiated when local lesions were apparent, we found Fig and Olive extracts were found to be a good source for the synthesis of (Ag-NPs), their formation was confirmed by color change and stability in solution. Nanoparticles biosynthesized using Fig and Olive extracts induced a reduction in the average size of cutaneous leishmaniasis lesions compared with the untreated mice. Moreover, nanoparticles treatment decreased oxidative stress (LPO, NO), down regulation gene expression levels (TNF-α, IL-1β and BAX) and this antileishmanial activity of nanoparticles was associated with enhanced antioxidant enzyme activities. In addition, histopathological evaluation proved the antileishmanial activity of nanoparticles compared to the positive control. Therefore, we aimed in this study to evaluate the protective effect of silver nanoparticles biosynthesized using Fig and Olive extracts against cutaneous lesions induced by Leishmania major infection through their anti-inflammatory, antioxidant activities and faster clinical efficacy than standard pentavalent antimonial treatment.
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Affiliation(s)
- Mina A. Almayouf
- Faculty of Science, Zoology Department, King Saud University, Riyadh 11451, Saudi Arabia
| | - Manal El-khadragy
- Biology Department, Faculty of Science, Princess Nourah Bint Abdulrahman University, Riyadh 11671, Saudi Arabia
- Department of Zoology and Entomology, Faculty of Science, Helwan University, Cairo 11795, Egypt
| | - Manal A. Awad
- King Abdullah Institute for Nanotechnology, King Saud University, Riyadh 11451, Saudi Arabia
| | - Ebtesam M. Alolayan
- Faculty of Science, Zoology Department, King Saud University, Riyadh 11451, Saudi Arabia
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13
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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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14
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Cristinziano L, Modestino L, Loffredo S, Varricchi G, Braile M, Ferrara AL, de Paulis A, Antonelli A, Marone G, Galdiero MR. Anaplastic Thyroid Cancer Cells Induce the Release of Mitochondrial Extracellular DNA Traps by Viable Neutrophils. THE JOURNAL OF IMMUNOLOGY 2020; 204:1362-1372. [PMID: 31959732 DOI: 10.4049/jimmunol.1900543] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Accepted: 12/18/2019] [Indexed: 12/13/2022]
Abstract
Neutrophils are key effector cells that orchestrate inflammatory responses in the tumor microenvironment. Although neutrophil extracellular DNA traps (NETs) entrap and kill pathogens, they also contribute to chronic inflammation and cancer progression. Thyroid cancer (TC) is the most frequently occurring cancer of the endocrine system, accounting for 70% of deaths due to endocrine tumors. Although anaplastic TC (ATC) is rare among TCs, it is highly lethal. We demonstrated in a recent study that tumor-infiltrating neutrophil density correlated with TC size. Moreover, TC-derived soluble mediators modulate the human neutrophil phenotype. Our study aimed to investigate the involvement of NETs in human TC. Highly purified neutrophils from healthy donors were primed in vitro with a papillary TC or ATC cell line conditioned medium (CM) or with a normal thyroid CM as control. NET release was quantified using a High-Content Imaging System. Neutrophil viability was assessed by flow cytometry. Fluorescence microscopy, flow cytometry, and PCR were performed to determine the mitochondrial origin of ATC-induced NETs. ATC CM-primed neutrophils were cocultured with ATC cells to determine the effects exerted by NETs on cell proliferation. ATC CM induce NET release, whereas papillary TC or normal thyroid CM did not. ATC CM-induced NET production occurred in a reactive oxygen species-dependent and cell death-independent manner and was associated with mitochondrial reactive oxygen species production; the NETs contained mitochondrial DNA. ATC CM-primed neutrophils promoted ATC cell proliferation in a NET-dependent manner.
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Affiliation(s)
- Leonardo Cristinziano
- Department of Translational Medical Sciences, University of Naples Federico II, 80131 Naples, Italy.,Center for Basic and Clinical Immunology Research, University of Naples Federico II, 80131 Naples, Italy.,World Allergy Organization Center of Excellence, University of Naples Federico II, 80131 Naples, Italy
| | - Luca Modestino
- Department of Translational Medical Sciences, University of Naples Federico II, 80131 Naples, Italy.,Center for Basic and Clinical Immunology Research, University of Naples Federico II, 80131 Naples, Italy.,World Allergy Organization Center of Excellence, University of Naples Federico II, 80131 Naples, Italy
| | - Stefania Loffredo
- Department of Translational Medical Sciences, University of Naples Federico II, 80131 Naples, Italy.,Center for Basic and Clinical Immunology Research, University of Naples Federico II, 80131 Naples, Italy.,World Allergy Organization Center of Excellence, University of Naples Federico II, 80131 Naples, Italy.,Institute of Experimental Endocrinology and Oncology "Gaetano Salvatore," National Research Council, 80131 Naples, Italy; and
| | - Gilda Varricchi
- Department of Translational Medical Sciences, University of Naples Federico II, 80131 Naples, Italy.,Center for Basic and Clinical Immunology Research, University of Naples Federico II, 80131 Naples, Italy.,World Allergy Organization Center of Excellence, University of Naples Federico II, 80131 Naples, Italy.,Institute of Experimental Endocrinology and Oncology "Gaetano Salvatore," National Research Council, 80131 Naples, Italy; and
| | - Mariantonia Braile
- Department of Translational Medical Sciences, University of Naples Federico II, 80131 Naples, Italy.,Center for Basic and Clinical Immunology Research, University of Naples Federico II, 80131 Naples, Italy.,World Allergy Organization Center of Excellence, University of Naples Federico II, 80131 Naples, Italy
| | - Anne Lise Ferrara
- Department of Translational Medical Sciences, University of Naples Federico II, 80131 Naples, Italy.,Center for Basic and Clinical Immunology Research, University of Naples Federico II, 80131 Naples, Italy.,World Allergy Organization Center of Excellence, University of Naples Federico II, 80131 Naples, Italy
| | - Amato de Paulis
- Department of Translational Medical Sciences, University of Naples Federico II, 80131 Naples, Italy.,Center for Basic and Clinical Immunology Research, University of Naples Federico II, 80131 Naples, Italy.,World Allergy Organization Center of Excellence, University of Naples Federico II, 80131 Naples, Italy
| | - Alessandro Antonelli
- Department of Clinical and Experimental Medicine, University of Pisa, 56126 Pisa, Italy
| | - Gianni Marone
- Department of Translational Medical Sciences, University of Naples Federico II, 80131 Naples, Italy.,Center for Basic and Clinical Immunology Research, University of Naples Federico II, 80131 Naples, Italy.,World Allergy Organization Center of Excellence, University of Naples Federico II, 80131 Naples, Italy.,Institute of Experimental Endocrinology and Oncology "Gaetano Salvatore," National Research Council, 80131 Naples, Italy; and
| | - Maria Rosaria Galdiero
- Department of Translational Medical Sciences, University of Naples Federico II, 80131 Naples, Italy; .,Center for Basic and Clinical Immunology Research, University of Naples Federico II, 80131 Naples, Italy.,World Allergy Organization Center of Excellence, University of Naples Federico II, 80131 Naples, Italy.,Institute of Experimental Endocrinology and Oncology "Gaetano Salvatore," National Research Council, 80131 Naples, Italy; and
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15
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Wanderley JLM, DaMatta RA, Barcinski MA. Apoptotic mimicry as a strategy for the establishment of parasitic infections: parasite- and host-derived phosphatidylserine as key molecule. Cell Commun Signal 2020; 18:10. [PMID: 31941500 PMCID: PMC6964003 DOI: 10.1186/s12964-019-0482-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Accepted: 11/11/2019] [Indexed: 12/14/2022] Open
Abstract
The establishment of parasitic infection is dependent on the development of efficient strategies to evade the host defense mechanisms. Phosphatidylserine (PS) molecules are pivotal for apoptotic cell recognition and clearance by professional phagocytes. Moreover, PS receptors are able to trigger anti-inflammatory and immunosuppressive responses by phagocytes, either by coupled enzymes or through the induction of regulatory cytokine secretion. These PS-dependent events are exploited by parasites in a mechanism called apoptotic mimicry. Generally, apoptotic mimicry refers to the effects of PS recognition for the initiation and maintenance of pathogenic infections. However, in this context, PS molecules can be recognized on the surface of the infectious agent or in the surface of apoptotic host debris, leading to the respective denomination of classical and non-classical apoptotic mimicry. In this review, we discuss the role of PS in the pathogenesis of several human infections caused by protozoan parasites. Video Abstract
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Affiliation(s)
- João Luiz Mendes Wanderley
- Laboratório de Imunoparasitologia, Campus UFRJ Macaé, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil.
| | - Renato Augusto DaMatta
- Laboratório de Biologia Celular e Tecidual, Centro de Biociências e Biotecnologia, Universidade Estadual Norte-Fluminense, Campos dos Goytacazes, RJ, Brazil
| | - Marcello André Barcinski
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
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16
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Comparison of three analytical methods for superoxide produced by activated immune cells. J Pharmacol Toxicol Methods 2019; 101:106637. [PMID: 31678429 DOI: 10.1016/j.vascn.2019.106637] [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] [Received: 04/14/2019] [Revised: 08/29/2019] [Accepted: 09/30/2019] [Indexed: 11/23/2022]
Abstract
Superoxide plays a key role in normal immune function and inflammatory diseases. In order to evaluate normal immune function or screen inhibitors of superoxide production for treating inflammatory diseases, it is very important to detect superoxide with good accuracy, sensitivity, and flexibility. In present study, we investigated three analysis methods of superoxide, colorimetric assay by WST-8, fluorescence assay by dihydroethidium and chemiluminescence assay by lucigenin, compared their precisions, specificities, sensitivities and time curve characteristics in superoxide analysis, and then validate their values in the screening of anti-inflammatory compounds. The results reveal that three analysis methods of superoxide all have good precisions and high specificities but have different sensitivities and time curve characteristics, which suggest their different applications. In addition, they can all be used in the screening of nicotinamide adenine dinucleotide phosphate (NADPH) oxidase inhibitors and anti-inflammatory compounds.
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17
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Carrero JC, Reyes-López M, Serrano-Luna J, Shibayama M, Unzueta J, León-Sicairos N, de la Garza M. Intestinal amoebiasis: 160 years of its first detection and still remains as a health problem in developing countries. Int J Med Microbiol 2019; 310:151358. [PMID: 31587966 DOI: 10.1016/j.ijmm.2019.151358] [Citation(s) in RCA: 61] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Revised: 08/29/2019] [Accepted: 09/15/2019] [Indexed: 12/22/2022] Open
Abstract
Amoebiasis is a parasitic disease caused by Entamoeba histolytica (E. histolytica), an extracellular enteric protozoan. This infection mainly affects people from developing countries with limited hygiene conditions, where it is endemic. Infective cysts are transmitted by the fecal-oral route, excysting in the terminal ileum and producing invasive trophozoites (amoebae). E. histolytica mainly lives in the large intestine without causing symptoms; however, possibly as a result of so far unknown signals, the amoebae invade the mucosa and epithelium causing intestinal amoebiasis. E. histolytica possesses different mechanisms of pathogenicity for the adherence to the intestinal epithelium and for degrading extracellular matrix proteins, producing tissue lesions that progress to abscesses and a host acute inflammatory response. Much information has been obtained regarding the virulence factors, metabolism, mechanisms of pathogenicity, and the host immune response against this parasite; in addition, alternative treatments to metronidazole are continually emerging. An accesible and low-cost diagnostic method that can distinguish E. histolytica from the most nonpathogenic amoebae and an effective vaccine are necessary for protecting against amoebiasis. However, research about the disease and its prevention has been a challenge due to the relationship between E. histolytica and the host during the distinct stages of the disease is multifaceted. In this review, we analyze the interaction between the parasite, the human host, and the colon microbiota or pathogenic microorganisms, which together give rise to intestinal amoebiasis.
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Affiliation(s)
- Julio C Carrero
- Departamento de Inmunología, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, CdMx, Mexico
| | - Magda Reyes-López
- Departamento de Biología Celular, Centro de Investigación y de Estudios Avanzados del IPN, CdMx, Mexico
| | - Jesús Serrano-Luna
- Departamento de Biología Celular, Centro de Investigación y de Estudios Avanzados del IPN, CdMx, Mexico
| | - Mineko Shibayama
- Departamento de Infectómica y Patogénesis Molecular, Centro de Investigación y de Estudios Avanzados del IPN, CdMx, Mexico
| | - Juan Unzueta
- Departamento de Infectómica y Patogénesis Molecular, Centro de Investigación y de Estudios Avanzados del IPN, CdMx, Mexico
| | - Nidia León-Sicairos
- Departamento de Investigación, Hospital Pediátrico de Sinaloa México, Unidad de Investigación, CIASaP, Facultad de Medicina, Universidad Autónoma de Sinaloa, Culiacán, Sinaloa, Mexico
| | - Mireya de la Garza
- Departamento de Biología Celular, Centro de Investigación y de Estudios Avanzados del IPN, CdMx, Mexico.
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18
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Betanzos A, Bañuelos C, Orozco E. Host Invasion by Pathogenic Amoebae: Epithelial Disruption by Parasite Proteins. Genes (Basel) 2019; 10:E618. [PMID: 31416298 PMCID: PMC6723116 DOI: 10.3390/genes10080618] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Revised: 04/25/2019] [Accepted: 04/29/2019] [Indexed: 02/07/2023] Open
Abstract
The epithelium represents the first and most extensive line of defence against pathogens, toxins and pollutant agents in humans. In general, pathogens have developed strategies to overcome this barrier and use it as an entrance to the organism. Entamoeba histolytica, Naegleriafowleri and Acanthamoeba spp. are amoebae mainly responsible for intestinal dysentery, meningoencephalitis and keratitis, respectively. These amoebae cause significant morbidity and mortality rates. Thus, the identification, characterization and validation of molecules participating in host-parasite interactions can provide attractive targets to timely intervene disease progress. In this work, we present a compendium of the parasite adhesins, lectins, proteases, hydrolases, kinases, and others, that participate in key pathogenic events. Special focus is made for the analysis of assorted molecules and mechanisms involved in the interaction of the parasites with epithelial surface receptors, changes in epithelial junctional markers, implications on the barrier function, among others. This review allows the assessment of initial host-pathogen interaction, to correlate it to the potential of parasite invasion.
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Affiliation(s)
- Abigail Betanzos
- Consejo Nacional de Ciencia y Tecnología (CONACYT), Mexico City 03940, Mexico
- Departamento de Infectómica y Patogénesis Molecular, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (CINVESTAV-IPN), Mexico City 07360, Mexico
| | - Cecilia Bañuelos
- Coordinación General de Programas de Posgrado Multidisciplinarios, Programa de Doctorado Transdisciplinario en Desarrollo Científico y Tecnológico para la Sociedad, CINVESTAV-IPN, Mexico City 07360, Mexico
| | - Esther Orozco
- Departamento de Infectómica y Patogénesis Molecular, CINVESTAV-IPN, Mexico City 07360, Mexico.
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19
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Fonseca Z, Uribe-Querol E, Díaz-Godínez C, Carrero JC, Rosales C. Pathogenic Entamoeba histolytica, but not Entamoeba dispar, induce neutrophil extracellular trap (NET) formation. J Leukoc Biol 2019; 105:1167-1181. [PMID: 30913315 DOI: 10.1002/jlb.ma0818-309rrr] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2018] [Revised: 03/08/2019] [Accepted: 03/11/2019] [Indexed: 12/11/2022] Open
Abstract
Amoebiasis is an infection of global importance, caused by the eukaryotic parasite Entamoeba histolytica. Pathogenic E. histolytica is associated worldwide with over a million cases of amoebic dysentery, colitis, and amoebic liver abscess. In contrast, the nonpathogenic Entamoeba dispar does not cause these diseases, although it is commonly found in the same areas as pathogenic amoeba. Entamoeba histolytica infection is usually associated with infiltrating neutrophils. These neutrophils appear to play a defensive role against this parasite, by mechanisms not completely understood. Recently, our group reported that neutrophil extracellular traps (NET) are produced in response to E. histolytica trophozoites. But, there is no information on whether nonpathogenic E. dispar can also induce NET formation. In this report, we explored the possibility that E. dispar leads to NET formation. Neutrophils were stimulated by E. histolytica trophozoites or by E. dispar trophozoites, and NET formation was assessed by video microscopy. NET induced by E. histolytica were important for trapping and killing amoebas. In contrast, E. dispar did not induce NET formation in any condition. Also E. dispar did not induce neutrophil degranulation or reactive oxygen species production. In addition, E. histolytica-induced NET formation required alive amoebas and it was inhibited by galactose, N-acetylgalactosamine, and lactose. These data show that only alive pathogenic E. histolytica activates neutrophils to produce NET, and suggest that recognition of the parasite involves a carbohydrate with an axial HO- group at carbon 4 of a hexose.
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Affiliation(s)
- Zayda Fonseca
- Departamento de Inmunología, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Eileen Uribe-Querol
- División de Estudios de Posgrado e Investigación, Facultad de Odontología, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - César Díaz-Godínez
- Departamento de Inmunología, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Julio C Carrero
- Departamento de Inmunología, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Carlos Rosales
- Departamento de Inmunología, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Mexico City, Mexico
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20
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Díaz-Godínez C, Carrero JC. The state of art of neutrophil extracellular traps in protozoan and helminthic infections. Biosci Rep 2019; 39:BSR20180916. [PMID: 30498092 PMCID: PMC6328873 DOI: 10.1042/bsr20180916] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Revised: 10/26/2018] [Accepted: 11/15/2018] [Indexed: 12/23/2022] Open
Abstract
Neutrophil extracellular traps (NETs) are DNA fibers associated with histones, enzymes from neutrophil granules and anti-microbial peptides. NETs are released in a process denominated NETosis, which involves sequential steps that culminate with the DNA extrusion. NETosis has been described as a new mechanism of innate immunity related to defense against different pathogens. The initial studies of NETs were carried out with bacteria and fungi, but currently a large variety of microorganisms capable of inducing NETs have been described including protozoan and helminth parasites. Nevertheless, we have little knowledge about how NETosis process is carried out in response to the parasites, and about its implication in the resolution of this kind of disease. In the best case, the NETs entrap and kill parasites in vitro, but in others, immobilize the parasites without affecting their viability. Moreover, insufficient studies on the NETs in animal models of infections that would help to define their role, and the association of NETs with chronic inflammatory pathologies such as those occurring in several parasitic infections have left open the possibility of NETs contributing to pathology instead of protection. In this review, we focus on the reported mechanisms that lead to NET release by protozoan and helminth parasites and the evidence that support the role of NETosis in the resolution or pathogenesis of parasitic diseases.
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Affiliation(s)
- César Díaz-Godínez
- Department of Immunology, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, 04510, México D.F., México
| | - Julio C Carrero
- Department of Immunology, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, 04510, México D.F., México
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21
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O-deGlcNAcylation is required for Entamoeba histolytica-induced HepG2 cell death. Microb Pathog 2018; 123:285-295. [DOI: 10.1016/j.micpath.2018.07.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Revised: 07/12/2018] [Accepted: 07/12/2018] [Indexed: 11/17/2022]
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22
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Chen YC, Chou WY, Fu TC, Wang JS. Effects of normoxic and hypoxic exercise training on the bactericidal capacity and subsequent apoptosis of neutrophils in sedentary men. Eur J Appl Physiol 2018; 118:1985-1995. [PMID: 29987365 DOI: 10.1007/s00421-018-3935-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Accepted: 07/05/2018] [Indexed: 01/08/2023]
Abstract
Phagocytosis and oxidative burst are essential mechanisms of innate immunity by which neutrophils eliminate invading pathogens. Afterwards, phagocytic neutrophils are dissipated by facilitating apoptosis to control inflammation. This study investigates how exercise training with or without hypoxic exposure affects the bactericidal activity and subsequent apoptosis of neutrophils following strenuous exercise. A total of 60 healthy, sedentary men were randomly divided into four groups (n = 15 in each group), who were exposed to 21% O2 [normoxic control (NC)] or 15% O2 [hypoxic control (HC)] at rest or were trained at 50% of peak work rate at 21% O2 [normoxic training (NT)] or 15% O2 [hypoxic training (HT)] for 30 min/day, 5 days/week for 4 weeks. Before the intervention, acute strenuous exercise (SE) enhanced the phagocytosis of Escherichia coli (E. coli) by neutrophils and the release of neutrophil oxidant products in response to E. coli, accompanied by increases in the expression of adhesion molecules (CD62L, CD11b, and CD11a), an opsonic receptor (FcγIIIBR), and complement receptors (C1qRp and CD5aR) on neutrophils. Subsequently, the SE facilitated caspase-3 activation and phosphatidylserine exposure in E. coli-stimulated neutrophils. Furthermore, 4 weeks of HT promoted the expressions of adhesion molecules and opsonic/complement receptors on neutrophils, and it also augmented the bactericidal and apoptotic activities of neutrophils at rest or after SE. However, NT, HC, and NC did not influence these neutrophil-related immune responses to strenuous exercise. Therefore, we conclude that the HT regimen effectively promotes the bactericidal capacity of neutrophils, and facilitates their subsequent apoptosis both at rest and following SE.
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Affiliation(s)
- Yi-Ching Chen
- Department of Rehabilitation Science, Jenteh Junior College of Medicine, Nursing and Management, Miaoli, Taiwan
| | - Wan-Yu Chou
- Healthy Aging Research Center, Graduate Institute of Rehabilitation Science, Medical Collage, Chang Gung University, 259 Wen-Hwa 1st Road, Kwei-Shan, Tao-Yuan, 333, Taiwan
| | - Tieh-Cheng Fu
- Department of Physical Medicine and Rehabilitation, Heart Failure Center, Chang Gung Memorial Hospital, Keelung, Taiwan
| | - Jong-Shyan Wang
- Healthy Aging Research Center, Graduate Institute of Rehabilitation Science, Medical Collage, Chang Gung University, 259 Wen-Hwa 1st Road, Kwei-Shan, Tao-Yuan, 333, Taiwan. .,Department of Physical Medicine and Rehabilitation, Heart Failure Center, Chang Gung Memorial Hospital, Keelung, Taiwan.
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23
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Fonseca Z, Díaz-Godínez C, Mora N, Alemán OR, Uribe-Querol E, Carrero JC, Rosales C. Entamoeba histolytica Induce Signaling via Raf/MEK/ERK for Neutrophil Extracellular Trap (NET) Formation. Front Cell Infect Microbiol 2018; 8:226. [PMID: 30023352 PMCID: PMC6039748 DOI: 10.3389/fcimb.2018.00226] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2018] [Accepted: 06/15/2018] [Indexed: 12/25/2022] Open
Abstract
Amoebiasis, the disease caused by Entamoeba histolytica is the third leading cause of human deaths among parasite infections. E. histolytica was reported associated with around 100 million cases of amoebic dysentery, colitis and amoebic liver abscess that lead to almost 50,000 fatalities worldwide in 2010. E. histolytica infection is associated with the induction of inflammation characterized by a large number of infiltrating neutrophils. These neutrophils have been implicated in defense against this parasite, by mechanisms not completely described. The neutrophil antimicrobial mechanisms include phagocytosis, degranulation, and formation of neutrophil extracellular traps (NETs). Recently, our group reported that NETs are also produced in response to E. histolytica trophozoites. But, the mechanism for NETs induction remains unknown. In this report we explored the possibility that E. histolytica leads to NETs formation via a signaling pathway similar to the pathways activated by PMA or the Fc receptor FcγRIIIb. Neutrophils were stimulated by E. histolytica trophozoites and the effect of various pharmacological inhibitors on amoeba-induced NETs formation was assessed. Selective inhibitors of Raf, MEK, and NF-κB prevented E. histolytica-induced NET formation. In contrast, inhibitors of PKC, TAK1, and NADPH-oxidase did not block E. histolytica-induced NETs formation. E. histolytica induced phosphorylation of ERK in a Raf and MEK dependent manner. These data show that E. histolytica activates a signaling pathway to induce NETs formation, that involves Raf/MEK/ERK, but it is independent of PKC, TAK1, and reactive oxygen species (ROS). Thus, amoebas activate neutrophils via a different pathway from the pathways activated by PMA or the IgG receptor FcγRIIIb.
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Affiliation(s)
- Zayda Fonseca
- Departamento de Inmunología, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - César Díaz-Godínez
- Departamento de Inmunología, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Nancy Mora
- Departamento de Inmunología, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Omar R Alemán
- Departamento de Inmunología, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Eileen Uribe-Querol
- División de Estudios de Posgrado e Investigación, Facultad de Odontología, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Julio C Carrero
- Departamento de Inmunología, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Carlos Rosales
- Departamento de Inmunología, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Mexico City, Mexico
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24
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Díaz-Godínez C, Fonseca Z, Néquiz M, Laclette JP, Rosales C, Carrero JC. Entamoeba histolytica Trophozoites Induce a Rapid Non-classical NETosis Mechanism Independent of NOX2-Derived Reactive Oxygen Species and PAD4 Activity. Front Cell Infect Microbiol 2018; 8:184. [PMID: 29922599 PMCID: PMC5996068 DOI: 10.3389/fcimb.2018.00184] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2018] [Accepted: 05/14/2018] [Indexed: 01/08/2023] Open
Abstract
Neutrophil extracellular traps (NETs) are DNA fibers decorated with histones and antimicrobial proteins from cytoplasmic granules released into the extracellular space in a process denominated NETosis. The molecular pathways involved in NETosis have not been completely understood. Classical NETosis mechanisms involve the neutrophil elastase (NE) translocation to nucleus due to the generation of reactive oxygen species (ROS) by NADPH oxidase (NOX2) or the peptidyl arginine deiminase 4 (PAD4) activation in response to an increase in extracellular calcium influx; both mechanisms result in DNA decondensation. Previously, we reported that trophozoites and lipopeptidophosphoglycan from Entamoeba histolytica trigger NET release in human neutrophils. Here, we demonstrated in a quantitative manner that NETs were rapidly form upon treatment with amoebic trophozoites and involved both nuclear and mitochondrial DNA (mtDNA). NETs formation depended on amoeba viability as heat-inactivated or paraformaldehyde-fixed amoebas were not able to induce NETs. Interestingly, ROS were not detected in neutrophils during their interaction with amoebas, which could explain why NOX2 inhibition using apocynin did not affect this NETosis. Surprisingly, whereas calcium chelation reduced NET release induced by amoebas, PAD4 inhibition by GSK484 failed to block DNA extrusion but, as expected, abolished NETosis induced by the calcium ionophore A23187. Additionally, NE translocation to the nucleus and serine-protease activity were necessary for NET release caused by amoeba. These data support the idea that E. histolytica trophozoites trigger NETosis by a rapid non-classical mechanism and that different mechanisms of NETs release exist depending on the stimuli used.
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Affiliation(s)
- César Díaz-Godínez
- Laboratory of Immunology, Department of Immunology, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Zayda Fonseca
- Laboratory of Immunology, Department of Immunology, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Mario Néquiz
- Laboratory of Immunopathology, Department of Experimental Medicine, Hospital General de México, Facultad de Medicina, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Juan P Laclette
- Laboratory of Immunology, Department of Immunology, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Carlos Rosales
- Laboratory of Immunology, Department of Immunology, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Julio C Carrero
- Laboratory of Immunology, Department of Immunology, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Mexico City, Mexico
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25
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Damgaard D, Bjørn ME, Jensen PØ, Nielsen CH. Reactive oxygen species inhibit catalytic activity of peptidylarginine deiminase. J Enzyme Inhib Med Chem 2017; 32:1203-1208. [PMID: 28933232 PMCID: PMC6021033 DOI: 10.1080/14756366.2017.1368505] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
Protein citrullination catalysed by peptidylarginine deiminase (PAD) may play an important pathogenic role in several chronic inflammatory diseases and malignancies. PAD2, PAD4, and citrullinated proteins are found in the synovium of rheumatoid arthritis patients. PAD activity is dependent on calcium and reducing conditions. However, reactive oxygen species (ROS) have been shown to induce citrullination of histones in granulocytes. Here we examine the ability of H2O2 and leukocyte-derived ROS to regulate PAD activity using citrullination of fibrinogen as read-out. H2O2 at concentrations above 40 µM inhibited the catalytic activity of PAD2 and PAD4 in a dose-dependent manner. PMA-stimulated leukocytes citrullinated fibrinogen and this citrullination was markedly enhanced when ROS formation was inhibited by the NADPH oxidase inhibitor diphenyleneiodonium (DPI). In contrast, PAD released from stimulated leukocytes was unaffected by exogenously added H2O2 at concentrations up to 1000 µM. The role of ROS in regulating PAD activity may play an important part in preventing hypercitrullination of proteins.
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Affiliation(s)
- Dres Damgaard
- a Institute for Inflammation Research, Center for Rheumatology and Spine Diseases, Copenhagen University Hospital, Rigshospitalet , Copenhagen , Denmark.,b Section for Periodontology, Microbiology and Community Dentistry, Department of Odontology, Faculty of Health and Medical Sciences , University of Copenhagen , Copenhagen , Denmark
| | - Mads Emil Bjørn
- a Institute for Inflammation Research, Center for Rheumatology and Spine Diseases, Copenhagen University Hospital, Rigshospitalet , Copenhagen , Denmark.,c Department of Haematology , Roskilde Hospital , Roskilde , Denmark
| | - Peter Østrup Jensen
- a Institute for Inflammation Research, Center for Rheumatology and Spine Diseases, Copenhagen University Hospital, Rigshospitalet , Copenhagen , Denmark.,d Department of Clinical Microbiology , Copenhagen University Hospital, Rigshospitalet , Copenhagen , Denmark
| | - Claus Henrik Nielsen
- a Institute for Inflammation Research, Center for Rheumatology and Spine Diseases, Copenhagen University Hospital, Rigshospitalet , Copenhagen , Denmark.,b Section for Periodontology, Microbiology and Community Dentistry, Department of Odontology, Faculty of Health and Medical Sciences , University of Copenhagen , Copenhagen , Denmark
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Ghrenassia E, Guihot A, Dong Y, Robinet P, Fontaine T, Lacombe K, Lescot T, Meyohas MC, Elbim C. First Report of CD4 Lymphopenia and Defective Neutrophil Functions in a Patient with Amebiasis Associated with CMV Reactivation and Severe Bacterial and Fungal Infections. Front Microbiol 2017; 8:203. [PMID: 28243230 PMCID: PMC5303735 DOI: 10.3389/fmicb.2017.00203] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Accepted: 01/27/2017] [Indexed: 11/20/2022] Open
Abstract
We report the case of a patient with acute necrotizing colitis due to invasive amebiasis associated with CD4 lymphopenia and impaired neutrophil responses. The course of the disease was characterized by CMV reactivation and severe and recurrent bacterial and fungal infections, which might be related to the decreased CD4 T cell count and the impaired functional capacities of neutrophils, respectively. The clinical outcome was positive with normalization of both CD4 cell count and neutrophil functions.
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Affiliation(s)
- Etienne Ghrenassia
- AP-HP, Hôpital Saint-Antoine, Service des Maladies Infectieuses et Tropicales Paris, France
| | - Amélie Guihot
- Département d'Immunologie, AP-HP, Hôpital Pitié-SalpêtrièreParis, France; DHU FAST, CR7, Centre d'Immunologie et des Maladies Infectieuses, Sorbonne Universités, UPMC Univ Paris 06Paris, France; Institut National de la Santé et de la Recherche Médicale, U1135, Centre d'Immunologie et des Maladies Infectieuses-ParisParis, France
| | - Yuan Dong
- Institut National de la Santé et de la Recherche Médicale, Centre de Recherche Saint-Antoine, UMR-S 938 Paris, France
| | - Pauline Robinet
- DHU FAST, CR7, Centre d'Immunologie et des Maladies Infectieuses, Sorbonne Universités, UPMC Univ Paris 06Paris, France; Institut National de la Santé et de la Recherche Médicale, U1135, Centre d'Immunologie et des Maladies Infectieuses-ParisParis, France
| | | | - Karine Lacombe
- AP-HP, Hôpital Saint-Antoine, Service des Maladies Infectieuses et Tropicales Paris, France
| | - Thomas Lescot
- Unité de Réanimation Chirurgicale Digestive, Département D'anesthésie et de Réanimation Chirurgicale, AP-HP, Hôpital Saint-Antoine Paris, France
| | - Marie-Caroline Meyohas
- AP-HP, Hôpital Saint-Antoine, Service des Maladies Infectieuses et Tropicales Paris, France
| | - Carole Elbim
- DHU FAST, CR7, Centre d'Immunologie et des Maladies Infectieuses, Sorbonne Universités, UPMC Univ Paris 06Paris, France; Institut National de la Santé et de la Recherche Médicale, U1135, Centre d'Immunologie et des Maladies Infectieuses-ParisParis, France
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27
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Hübner DPG, de Brum Vieira P, Frasson AP, Menezes CB, Senger FR, Santos da Silva GN, Baggio Gnoatto SC, Tasca T. Anti-Trichomonas vaginalis activity of betulinic acid derivatives. Biomed Pharmacother 2016; 84:476-484. [DOI: 10.1016/j.biopha.2016.09.064] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2016] [Revised: 09/08/2016] [Accepted: 09/16/2016] [Indexed: 12/29/2022] Open
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Key role for neutrophils in radiation-induced antitumor immune responses: Potentiation with G-CSF. Proc Natl Acad Sci U S A 2016; 113:11300-11305. [PMID: 27651484 DOI: 10.1073/pnas.1613187113] [Citation(s) in RCA: 117] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Radiation therapy (RT), a major modality for treating localized tumors, can induce tumor regression outside the radiation field through an abscopal effect that is thought to involve the immune system. Our studies were designed to understand the early immunological effects of RT in the tumor microenvironment using several syngeneic mouse tumor models. We observed that RT induced sterile inflammation with a rapid and transient infiltration of CD11b+Gr-1high+ neutrophils into the tumors. RT-recruited tumor-associated neutrophils (RT-Ns) exhibited an increased production of reactive oxygen species and induced apoptosis of tumor cells. Tumor infiltration of RT-Ns resulted in sterile inflammation and, eventually, the activation of tumor-specific cytotoxic T cells, their recruitment into the tumor site, and tumor regression. Finally, the concurrent administration of granulocyte colony-stimulating factor (G-CSF) enhanced RT-mediated antitumor activity by activating RT-Ns. Our results suggest that the combination of RT and G-CSF should be further evaluated in preclinical and clinical settings.
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Ventura-Juarez J, Campos-Esparza M, Pacheco-Yepez J, López-Blanco JA, Adabache-Ortíz A, Silva-Briano M, Campos-Rodríguez R. Entamoeba histolytica induces human neutrophils to form NETs. Parasite Immunol 2016; 38:503-9. [PMID: 27138813 DOI: 10.1111/pim.12332] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2015] [Accepted: 04/26/2016] [Indexed: 01/16/2023]
Abstract
Entamoeba histolytica invades the intestine and other organs during the pathogenesis of amoebiasis. In the early stages, the host organism responds with an inflammatory infiltrate composed mostly of neutrophils. It has been reported that these immune cells, activated by E. histolytica, exert a protective role by releasing proteolytic enzymes and generating reactive oxygen/nitrogen species (ROS/RNS) and antimicrobial peptides. It is now known that neutrophils also produce neutrophil extracellular traps (NETs), which are able to damage and kill pathogens. Studies have shown that intracellular protozoan pathogens, including Toxoplasma gondi, Plasmodium falciparum and Leishmania spp, induce neutrophils to release NETs and are damaged by them. However, the action of this mechanism has not been explored in relation to E. histolytica trophozoites. Through scanning electron, epifluorescence microscopy and viability assays, we show for first time that during in vitro interaction with E. histolytica trophozoites, human neutrophils released NETs that covered amoebas and reduced amoebic viability. These NETs presented histones, myeloperoxidase and decondensed chromatin. The results suggest that NETs participate in the elimination of the parasite.
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Affiliation(s)
- J Ventura-Juarez
- Centro de Ciencias Básicas, Universidad Autónoma de Aguascalientes, Ags, México
| | - Mr Campos-Esparza
- Centro de Ciencias Básicas, Universidad Autónoma de Aguascalientes, Ags, México
| | - J Pacheco-Yepez
- Sección de Estudios de Posgrado e Investigación, Escuela Superior de Medicina, Instituto Politécnico Nacional, Ciudad de México, México
| | - J A López-Blanco
- Unidad de Investigación Médica en Inmunoquímica, Hospital de Especialidades, Centro Médico Nacional, IMSS, Ciudad de México, México
| | - A Adabache-Ortíz
- Centro de Ciencias Básicas, Universidad Autónoma de Aguascalientes, Ags, México
| | - M Silva-Briano
- Centro de Ciencias Básicas, Universidad Autónoma de Aguascalientes, Ags, México
| | - R Campos-Rodríguez
- Sección de Estudios de Posgrado e Investigación, Escuela Superior de Medicina, Instituto Politécnico Nacional, Ciudad de México, México
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30
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Pontes AS, Setúbal SDS, Nery NM, da Silva FS, da Silva SD, Fernandes CFC, Stábeli RG, Soares AM, Zuliani JP. p38 MAPK is involved in human neutrophil chemotaxis induced by L-amino acid oxidase from Calloselasma rhodosthoma. Toxicon 2016; 119:106-16. [PMID: 27242041 DOI: 10.1016/j.toxicon.2016.05.013] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2016] [Revised: 04/11/2016] [Accepted: 05/26/2016] [Indexed: 12/12/2022]
Abstract
The action of LAAO, an L-amino acid oxidase isolated from Calloselasma rhodosthoma snake venom, on isolated human neutrophil function was investigated. Cr-LAAO showed no toxicity on neutrophils. Cr-LAAO in its native form induced the neutrophil chemotaxis, suggesting that its primary structure is essential for stimulation the cell. p38 MAPK and PI3K have a role as signaling pathways of CR-LAAO induced chemotaxis. This toxin also induced the production of hydrogen peroxide and stimulated phagocytosis in neutrophils. Furthermore, Cr-LAAO was able to stimulate neutrophils to release IL-6, IL-8, MPO, LTB4 and PGE2. Together, the data showed that the Cr-LAAO triggers relevant proinflammatory events.
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Affiliation(s)
- Adriana S Pontes
- Laboratório de Imunologia Celular Aplicada à Saúde, Fundação Oswaldo Cruz, FIOCRUZ Rondônia, Porto Velho, RO, Brazil
| | - Sulamita da S Setúbal
- Laboratório de Imunologia Celular Aplicada à Saúde, Fundação Oswaldo Cruz, FIOCRUZ Rondônia, Porto Velho, RO, Brazil
| | - Neriane Monteiro Nery
- Laboratório de Imunologia Celular Aplicada à Saúde, Fundação Oswaldo Cruz, FIOCRUZ Rondônia, Porto Velho, RO, Brazil
| | - Francisquinha Souza da Silva
- Laboratório de Imunologia Celular Aplicada à Saúde, Fundação Oswaldo Cruz, FIOCRUZ Rondônia, Porto Velho, RO, Brazil; Faculdade São Lucas, Porto Velho, RO, Brazil
| | - Silvana D da Silva
- Faculdade São Lucas, Porto Velho, RO, Brazil; Centro de Estudos de Biomoléculas Aplicadas à Saúde (CEBio), Fundação Oswaldo Cruz, FIOCRUZ Rondônia e Departamento de Medicina, Universidade Federal de Rondônia, UNIR, Porto Velho, RO, Brazil
| | - Carla F C Fernandes
- Centro de Estudos de Biomoléculas Aplicadas à Saúde (CEBio), Fundação Oswaldo Cruz, FIOCRUZ Rondônia e Departamento de Medicina, Universidade Federal de Rondônia, UNIR, Porto Velho, RO, Brazil; Centro de Pesquisa em Medicina Tropical, Porto Velho, RO, Brazil
| | - Rodrigo G Stábeli
- Centro de Estudos de Biomoléculas Aplicadas à Saúde (CEBio), Fundação Oswaldo Cruz, FIOCRUZ Rondônia e Departamento de Medicina, Universidade Federal de Rondônia, UNIR, Porto Velho, RO, Brazil
| | - Andreimar M Soares
- Faculdade São Lucas, Porto Velho, RO, Brazil; Centro de Estudos de Biomoléculas Aplicadas à Saúde (CEBio), Fundação Oswaldo Cruz, FIOCRUZ Rondônia e Departamento de Medicina, Universidade Federal de Rondônia, UNIR, Porto Velho, RO, Brazil
| | - Juliana P Zuliani
- Laboratório de Imunologia Celular Aplicada à Saúde, Fundação Oswaldo Cruz, FIOCRUZ Rondônia, Porto Velho, RO, Brazil; Centro de Estudos de Biomoléculas Aplicadas à Saúde (CEBio), Fundação Oswaldo Cruz, FIOCRUZ Rondônia e Departamento de Medicina, Universidade Federal de Rondônia, UNIR, Porto Velho, RO, Brazil.
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31
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Nakada-Tsukui K, Nozaki T. Immune Response of Amebiasis and Immune Evasion by Entamoeba histolytica. Front Immunol 2016; 7:175. [PMID: 27242782 PMCID: PMC4863898 DOI: 10.3389/fimmu.2016.00175] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2016] [Accepted: 04/20/2016] [Indexed: 12/27/2022] Open
Abstract
Entamoeba histolytica is a protozoan parasite and the causative agent of amebiasis. It is estimated approximately 1% of humans are infected with E. histolytica, resulting in an estimate of 100,000 deaths annually. Clinical manifestations of amebic infection range widely from asymptomatic to severe symptoms, including dysentery and extra-intestinal abscesses. Like other infectious diseases, it is assumed that only ~20% of infected individuals develop symptoms, and genetic factors of both the parasite and humans as well as the environmental factors, e.g., microbiota, determine outcome of infection. There are multiple essential steps in amebic infection: degradation of and invasion into the mucosal layer, adherence to the intestinal epithelium, invasion into the tissues, and dissemination to other organs. While the mechanisms of invasion and destruction of the host tissues by the amebae during infection have been elucidated at the molecular levels, it remains largely uncharacterized how the parasite survive in the host by evading and attacking host immune system. Recently, the strategies for immune evasion by the parasite have been unraveled, including immunomodulation to suppress IFN-γ production, elimination of immune cells and soluble immune mediators, and metabolic alterations against reactive oxygen and nitrogen species to fend off the attack from immune system. In this review, we summarized the latest knowledge on immune reaction and immune evasion during amebiasis.
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Affiliation(s)
- Kumiko Nakada-Tsukui
- Department of Parasitology, National Institute of Infectious Diseases , Tokyo , Japan
| | - Tomoyoshi Nozaki
- Department of Parasitology, National Institute of Infectious Diseases, Tokyo, Japan; Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Japan
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32
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Di Genova BM, Tonelli RR. Infection Strategies of Intestinal Parasite Pathogens and Host Cell Responses. Front Microbiol 2016; 7:256. [PMID: 26973630 PMCID: PMC4776161 DOI: 10.3389/fmicb.2016.00256] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2015] [Accepted: 02/16/2016] [Indexed: 12/24/2022] Open
Abstract
Giardia lamblia, Cryptosporidium sp., and Entamoeba histolytica are important pathogenic intestinal parasites and are amongst the leading causes worldwide of diarrheal illness in humans. Diseases caused by these organisms, giardiasis, cryptosporidiosis, and amoebiasis, respectively, are characterized by self-limited diarrhea but can evolve to long-term complications. The cellular and molecular mechanisms underlying the pathogenesis of diarrhea associated with these three pathogens are being unraveled, with knowledge of both the strategies explored by the parasites to establish infection and the methods evolved by hosts to avoid it. Special attention is being given to molecules participating in parasite–host interaction and in the mechanisms implicated in the diseases’ pathophysiologic processes. This review focuses on cell mechanisms that are modulated during infection, including gene transcription, cytoskeleton rearrangements, signal transduction pathways, and cell death.
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Affiliation(s)
- Bruno M Di Genova
- Departamento de Microbiologia e Imunologia, Universidade Federal de São Paulo São Paulo, Brazil
| | - Renata R Tonelli
- Departamento de Microbiologia e Imunologia, Universidade Federal de São PauloSão Paulo, Brazil; Instituto de Ciências Ambientais, Químicas e Farmacêuticas, Departamento de Ciências Biológicas, Universidade Federal de São PauloDiadema, Brazil
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33
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Lee JW, Kang HM, Won EJ, Hwang DS, Kim DH, Lee SJ, Lee JS. Multi-walled carbon nanotubes (MWCNTs) lead to growth retardation, antioxidant depletion, and activation of the ERK signaling pathway but decrease copper bioavailability in the monogonont rotifer (Brachionus koreanus). AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2016; 172:67-79. [PMID: 26773353 DOI: 10.1016/j.aquatox.2015.12.022] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2015] [Revised: 12/25/2015] [Accepted: 12/29/2015] [Indexed: 05/06/2023]
Abstract
To examine the toxic effects of multi-walled carbon nanotubes (MWCNTs) in the marine environment, we first exposed the monogonont rotifer (Brachionus koreanus) to MWCNTs in the presence of copper. The acute toxicity of copper decreased significantly with a decrease in copper bioavailability resulting from MWCNT exposure. Furthermore, we examined the effects of MWCNT exposure on reproductive capacity, population growth rate, growth patterns, antioxidant systems, and mitogen-activated protein kinase (MAPK) activation. Reproductive capacity, population growth rate, and body growth rate were significantly suppressed in B. koreanus in response to 1.3-4mg/L MWCNT exposure. Furthermore, MWCNTs induced the generation of reactive oxygen species (ROS) and decreased the antioxidant enzymatic activities of catalase (CAT) and glutathione reductase (GR). However, the enzymatic activity of glutathione S-transferase (GST) was up-regulated after a 24 h-exposure to 100mg/L MWCNTs. Exposure to 100mg/L MCWNTs induced extracellular signal-regulated kinase (ERK) activation in B. koreanus, suggesting that p-ERK may mediate the adverse effects of MWCNTs in B. koreanus via the MAPK signaling pathway. Our results provide insight into the mechanistic basis of the ecotoxicological effects of MWCNTs in the marine environment.
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Affiliation(s)
- Jin Wuk Lee
- Department of Biological Science, College of Science, Sungkyunkwan University, Suwon 16419, South Korea
| | - Hye-Min Kang
- Department of Biological Science, College of Science, Sungkyunkwan University, Suwon 16419, South Korea
| | - Eun-Ji Won
- Department of Biological Science, College of Science, Sungkyunkwan University, Suwon 16419, South Korea
| | - Dae-Sik Hwang
- Department of Biological Science, College of Science, Sungkyunkwan University, Suwon 16419, South Korea
| | - Duck-Hyun Kim
- Department of Biological Science, College of Science, Sungkyunkwan University, Suwon 16419, South Korea
| | - Su-Jae Lee
- Department of Life Science, College of Natural Sciences, Hanyang University, Seoul 04763, South Korea
| | - Jae-Seong Lee
- Department of Biological Science, College of Science, Sungkyunkwan University, Suwon 16419, South Korea.
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Campos-Rodríguez R, Gutiérrez-Meza M, Jarillo-Luna RA, Drago-Serrano ME, Abarca-Rojano E, Ventura-Juárez J, Cárdenas-Jaramillo LM, Pacheco-Yepez J. A review of the proposed role of neutrophils in rodent amebic liver abscess models. ACTA ACUST UNITED AC 2016; 23:6. [PMID: 26880421 PMCID: PMC4754534 DOI: 10.1051/parasite/2016006] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2015] [Accepted: 01/31/2016] [Indexed: 01/20/2023]
Abstract
Host invasion by Entamoeba histolytica, the pathogenic agent of amebiasis, can lead to the development of amebic liver abscess (ALA). Due to the difficulty of exploring host and amebic factors involved in the pathogenesis of ALA in humans, most studies have been conducted with animal models (e.g., mice, gerbils, and hamsters). Histopathological findings reveal that the chronic phase of ALA in humans corresponds to lytic or liquefactive necrosis, whereas in rodent models there is granulomatous inflammation. However, the use of animal models has provided important information on molecules and mechanisms of the host/parasite interaction. Hence, the present review discusses the possible role of neutrophils in the effector immune response in ALA in rodents. Properly activated neutrophils are probably successful in eliminating amebas through oxidative and non-oxidative mechanisms, including neutrophil degranulation, the generation of free radicals (O2−, H2O2, HOCl) and peroxynitrite, the activation of NADPH-oxidase and myeloperoxidase (MPO) enzymes, and the formation of neutrophil extracellular traps (NETs). On the other hand, if amebas are not eliminated in the early stages of infection, they trigger a prolonged and exaggerated inflammatory response that apparently causes ALAs. Genetic differences in animals and humans are likely to be key to a successful host immune response.
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Affiliation(s)
- Rafael Campos-Rodríguez
- Sección de Posgrado e Investigación, Escuela Superior de Medicina, Instituto Politécnico Nacional, Distrito Federal, México
| | - Manuel Gutiérrez-Meza
- Sección de Posgrado e Investigación, Escuela Superior de Medicina, Instituto Politécnico Nacional, Distrito Federal, México - Coordinación de Ciencias Morfológicas, Escuela Superior de Medicina, Instituto Politécnico Nacional, Distrito Federal, México
| | - Rosa Adriana Jarillo-Luna
- Sección de Posgrado e Investigación, Escuela Superior de Medicina, Instituto Politécnico Nacional, Distrito Federal, México - Coordinación de Ciencias Morfológicas, Escuela Superior de Medicina, Instituto Politécnico Nacional, Distrito Federal, México
| | - María Elisa Drago-Serrano
- Departamento de Sistemas Biológicos, Unidad Xochimilco, Universidad Autónoma Metropolitana, Distrito Federal, México
| | - Edgar Abarca-Rojano
- Sección de Posgrado e Investigación, Escuela Superior de Medicina, Instituto Politécnico Nacional, Distrito Federal, México
| | - Javier Ventura-Juárez
- Departamento de Morfología, Centro de Ciencias Básicas, Universidad Autónoma de Aguascalientes, Aguascalientes, México
| | - Luz María Cárdenas-Jaramillo
- Coordinación de Ciencias Morfológicas, Escuela Superior de Medicina, Instituto Politécnico Nacional, Distrito Federal, México
| | - Judith Pacheco-Yepez
- Sección de Posgrado e Investigación, Escuela Superior de Medicina, Instituto Politécnico Nacional, Distrito Federal, México
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35
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Begum S, Quach J, Chadee K. Immune Evasion Mechanisms of Entamoeba histolytica: Progression to Disease. Front Microbiol 2015; 6:1394. [PMID: 26696997 PMCID: PMC4678226 DOI: 10.3389/fmicb.2015.01394] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2015] [Accepted: 11/23/2015] [Indexed: 12/22/2022] Open
Abstract
Entamoeba histolytica (Eh) is a protozoan parasite that infects 10% of the world's population and results in 100,000 deaths/year from amebic dysentery and/or liver abscess. In most cases, this extracellular parasite colonizes the colon by high affinity binding to MUC2 mucin without disease symptoms, whereas in some cases, Eh triggers an aggressive inflammatory response upon invasion of the colonic mucosa. The specific host-parasite factors critical for disease pathogenesis are still not well characterized. From the parasite, the signature events that lead to disease progression are cysteine protease cleavage of the C-terminus of MUC2 that dissolves the mucus layer followed by Eh binding and cytotoxicity of the mucosal epithelium. The host mounts an ineffective excessive host pro-inflammatory response following contact with host cells that causes tissue damage and participates in disease pathogenesis as Eh escapes host immune clearance by mechanisms that are not completely understood. Ameba can modulate or destroy effector immune cells by inducing neutrophil apoptosis and suppressing respiratory burst or nitric oxide (NO) production from macrophages. Eh adherence to the host cells also induce multiple cytotoxic effects that can promote cell death through phagocytosis, apoptosis or by trogocytosis (ingestion of living cells) that might play critical roles in immune evasion. This review focuses on the immune evasion mechanisms that Eh uses to survive and induce disease manifestation in the host.
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Affiliation(s)
- Sharmin Begum
- Department of Microbiology, Immunology and Infectious Diseases, Cumming School of Medicine, Snyder Institute for Chronic Diseases, University of Calgary Calgary, AB, Canada
| | - Jeanie Quach
- Department of Microbiology, Immunology and Infectious Diseases, Cumming School of Medicine, Snyder Institute for Chronic Diseases, University of Calgary Calgary, AB, Canada
| | - Kris Chadee
- Department of Microbiology, Immunology and Infectious Diseases, Cumming School of Medicine, Snyder Institute for Chronic Diseases, University of Calgary Calgary, AB, Canada
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Narantsogt G, Min A, Nam YH, Lee YA, Kim KA, Agvaandaram G, Dorjsuren T, El-Benna J, Shin MH. Activation of MAPK Is Required for ROS Generation and Exocytosis in HMC-1 Cells Induced by Trichomonas vaginalis-Derived Secretory Products. THE KOREAN JOURNAL OF PARASITOLOGY 2015; 53:597-603. [PMID: 26537039 PMCID: PMC4635837 DOI: 10.3347/kjp.2015.53.5.597] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/31/2015] [Revised: 08/05/2015] [Accepted: 08/14/2015] [Indexed: 01/23/2023]
Abstract
Trichomonas vaginalis is a flagellated protozoan parasite that causes vaginitis and cervicitis in women and asymptomatic urethritis and prostatitis in men. Mast cells have been reported to be predominant in vaginal smears and vaginal walls of patients infected with T. vaginalis. Mitogen-activated protein kinase (MAPK), activated by various stimuli, have been shown to regulate the transcriptional activity of various cytokine genes in mast cells. In this study, we investigated whether MAPK is involved in ROS generation and exocytotic degranulation in HMC-1 cells induced by T. vaginalis-derived secretory products (TvSP). We found that TvSP induces the activation of MAPK and NADPH oxidase in HMC-1 cells. Stimulation with TvSP induced phosphorylation of MAPK and p47phox in HMC-1 cells. Stimulation with TvSP also induced up-regulation of CD63, a marker for exocytosis, along the surfaces of human mast cells. Pretreatment with MAPK inhibitors strongly inhibited TvSP-induced ROS generation and exocytotic degranulation. Finally, our results suggest that TvSP induces intracellular ROS generation and exocytotic degranulation in HMC-1 via MAPK signaling.
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Affiliation(s)
- Giimaa Narantsogt
- Department of Environmental Medical Biology, Institute of Tropical Medicine, Yonsei University College of Medicine, Seoul 03722, Korea.,Department of Basic Science, School of Pharmacy and Biomedicine, Mongolian National University of Medical Sciences, Ulaanbaatar, Mongolia
| | - Arim Min
- Department of Environmental Medical Biology, Institute of Tropical Medicine, Yonsei University College of Medicine, Seoul 03722, Korea
| | - Young Hee Nam
- Department of Environmental Medical Biology, Institute of Tropical Medicine, Yonsei University College of Medicine, Seoul 03722, Korea
| | - Young Ah Lee
- Department of Environmental Medical Biology, Institute of Tropical Medicine, Yonsei University College of Medicine, Seoul 03722, Korea
| | - Kyeong Ah Kim
- Department of Environmental Medical Biology, Institute of Tropical Medicine, Yonsei University College of Medicine, Seoul 03722, Korea
| | - Gurbadam Agvaandaram
- Department of Basic Science, School of Pharmacy and Biomedicine, Mongolian National University of Medical Sciences, Ulaanbaatar, Mongolia
| | - Temuulen Dorjsuren
- Department of Basic Science, School of Pharmacy and Biomedicine, Mongolian National University of Medical Sciences, Ulaanbaatar, Mongolia
| | - Jamel El-Benna
- DR-CNRS Centre de Recherche Biomedical, INSERM U773, Universite Paris & Denis Diderot, Paris, France
| | - Myeong Heon Shin
- Department of Environmental Medical Biology, Institute of Tropical Medicine, Yonsei University College of Medicine, Seoul 03722, Korea
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Song X, Wei Z, Shaikh ZA. Requirement of ERα and basal activities of EGFR and Src kinase in Cd-induced activation of MAPK/ERK pathway in human breast cancer MCF-7 cells. Toxicol Appl Pharmacol 2015; 287:26-34. [PMID: 26006730 PMCID: PMC4490940 DOI: 10.1016/j.taap.2015.05.010] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2014] [Revised: 04/26/2015] [Accepted: 05/13/2015] [Indexed: 12/29/2022]
Abstract
Cadmium (Cd) is a common environmental toxicant and an established carcinogen. Epidemiological studies implicate Cd with human breast cancer. Low micromolar concentrations of Cd promote proliferation of human breast cancer cells in vitro. The growth promotion of breast cancer cells is associated with the activation of MAPK/ERK pathway. This study explores the mechanism of Cd-induced activation of MAPK/ERK pathway. Specifically, the role of cell surface receptors ERα, EGFR, and Src kinase was evaluated in human breast cancer MCF-7 cells treated with 1-3μM Cd. The activation of ERK was studied using a serum response element (SRE) luciferase reporter assay. Receptor phosphorylation was detected by Western blot analyses. Cd treatment increased both the SRE reporter activity and ERK1/2 phosphorylation in a concentration-dependent manner. Cd treatment had no effect on reactive oxygen species (ROS) generation. Also, blocking the entry of Cd into the cells with manganese did not diminish Cd-induced activation of MAPK/ERK. These results suggest that the effect of Cd was likely not caused by intracellular ROS generation, but through interaction with the membrane receptors. While Cd did not appear to activate either EGFR or Src kinase, their inhibition completely blocked the Cd-induced activation of ERK as well as cell proliferation. Similarly, silencing ERα with siRNA or use of ERα antagonist blocked the effects of Cd. Based on these results, it is concluded that not only ERα, but also basal activities of EGFR and Src kinase are essential for Cd-induced signal transduction and activation of MAPK/ERK pathway for breast cancer cell proliferation.
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Affiliation(s)
- Xiulong Song
- Center for Molecular Toxicology, Department of Biomedical and Pharmaceutical Sciences, College of Pharmacy, University of Rhode Island, Kingston, RI 02881, USA.
| | - Zhengxi Wei
- Center for Molecular Toxicology, Department of Biomedical and Pharmaceutical Sciences, College of Pharmacy, University of Rhode Island, Kingston, RI 02881, USA
| | - Zahir A Shaikh
- Center for Molecular Toxicology, Department of Biomedical and Pharmaceutical Sciences, College of Pharmacy, University of Rhode Island, Kingston, RI 02881, USA.
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Antioxidant and anti-inflammatory activities of pomegranate (Punica granatum) on Eimeria papillata-induced infection in mice. BIOMED RESEARCH INTERNATIONAL 2015; 2015:219670. [PMID: 25654088 PMCID: PMC4310320 DOI: 10.1155/2015/219670] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/17/2014] [Accepted: 09/23/2014] [Indexed: 11/24/2022]
Abstract
Coccidiosis is the most prevalent disease causing widespread economic loss, especially in poultry farms. Here, we investigated the effects of pomegranate peel extract (PPE) on the outcome of coccidiosis caused by Eimeria papillata in mice. The data showed that mice infected with E. papillata and treated with PPE revealed a significant decrease in the output of oocysts in their faeces by day 5 p.i. Infection also induced inflammation and injury of the jejunum. This was evidenced (i) as increases in reactive oxygen species, (ii), as increased neutrophils and decreased lymphocytes in blood (ii) as increased mRNA levels of inducible nitric oxide synthase (iNOS), Bcl-2 gene, and of the cytokines interferon gamma (IFN-γ), tumour necrosis factor-α (TNF-α), and interleukin-1β (IL-1β), and (iv) as downregulation of mucin gene MUC2 mRNA. All these infection-induced parameters were significantly altered during PPE treatment. In particular, PPE counteracted the E. papillata-induced loss of the total antioxidant capacity. Our data indicated that PPE treatment significantly attenuated inflammation and injury of the jejunum induced by E. papillata infections.
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Lee YA, Saito-Nakano Y, Kim KA, Min A, Nozaki T, Shin MH. Modulation of endogenous Cysteine Protease Inhibitor (ICP) 1 expression in Entamoeba histolytica affects amoebic adhesion to Extracellular Matrix proteins. Exp Parasitol 2014; 149:7-15. [PMID: 25500214 DOI: 10.1016/j.exppara.2014.12.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2014] [Revised: 11/07/2014] [Accepted: 12/02/2014] [Indexed: 12/31/2022]
Abstract
Entamoeba histolytica is an enteric tissue-invading protozoan parasite that causes amoebic colitis and occasionally liver abscess in humans. During tissue invasion, amoebic adhesion to host components is an important event for host cell death leading to successful invasion and infection. Among amoebic virulence factors, Gal/GalNAc lectin is known to be major adhesion factor to host cells. In this study, we investigated the role of amoebic secreted CP (Cysteine Proteases) in amoebic adhesion to extracellular matrix (ECM) protein using CP inhibitor and E. histolytica strains in which the endogenous inhibitor of cysteine protease (ICP) 1 gene was overexpressed (ICP1(+)) or repressed by antisense small RNA-mediated gene silencing (ICP1(-)). We found that pretreatment of wild-type amoebae with CP inhibitor E64, or thiol-group modifiers such as diamide and N-Ethylmaleimide resulted in a significant decrease in adhesion to laminin and collagen ECM proteins. Furthermore, ICP1(+) strain, with a reduction of secreted CP activity, exhibited reduced ability by 40% to adhere to laminin. In contrast, ICP1(-) strain, with a 1.9-fold increase of secreted CP activity, showed a two-fold increase in amoebic adherence to laminin compared to the control strain. In addition, total amount of secreted CP5 was decreased in ICP1(+) amoeba. Conversely, total amount of secreted CP1 and mature-form CP5 were increased in ICP1(-) amoeba. We also found that ICP1 was secreted into extracellular milieu. These results suggest that secreted CP activity by E. histolytica may be an important factor affecting adhesion to host proteins, and regulation of CP secretion by ICP plays a major role in pathogenesis. This study provides insight into the CP-mediated tissue pathogenesis in amoeba-invaded lesions during human amoebiasis.
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Affiliation(s)
- Young Ah Lee
- Department of Environmental Medical Biology, Institute of Tropical Medicine, Yonsei University College of Medicine, Seoul 120-752, Republic of Korea
| | - Yumiko Saito-Nakano
- Department of Parasitology, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku-ku, Tokyo, Japan
| | - Kyeong Ah Kim
- Department of Environmental Medical Biology, Institute of Tropical Medicine, Yonsei University College of Medicine, Seoul 120-752, Republic of Korea
| | - Arim Min
- Department of Environmental Medical Biology, Institute of Tropical Medicine, Yonsei University College of Medicine, Seoul 120-752, Republic of Korea
| | - Tomoyoshi Nozaki
- Department of Parasitology, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku-ku, Tokyo, Japan
| | - Myeong Heon Shin
- Department of Environmental Medical Biology, Institute of Tropical Medicine, Yonsei University College of Medicine, Seoul 120-752, Republic of Korea.
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Kim KA, Min A, Lee YA, Shin MH. Degradation of the transcription factors NF-κB, STAT3, and STAT5 is involved in Entamoeba histolytica-induced cell death in Caco-2 colonic epithelial cells. THE KOREAN JOURNAL OF PARASITOLOGY 2014; 52:459-69. [PMID: 25352693 PMCID: PMC4210727 DOI: 10.3347/kjp.2014.52.5.459] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/02/2014] [Revised: 08/05/2014] [Accepted: 08/13/2014] [Indexed: 12/11/2022]
Abstract
Entamoeba histolytica is a tissue-invasive protozoan parasite causing dysentery in humans. During infection of colonic tissues, amoebic trophozoites are able to kill host cells via apoptosis or necrosis, both of which trigger IL-8-mediated acute inflammatory responses. However, the signaling pathways involved in host cell death induced by E. histolytica have not yet been fully defined. In this study, we examined whether calpain plays a role in the cleavage of pro-survival transcription factors during cell death of colonic epithelial cells, induced by live E. histolytica trophozoites. Incubation with amoebic trophozoites induced activation of m-calpain in a time- and dose-dependent manner. Moreover, incubation with amoebae resulted in marked degradation of STAT proteins (STAT3 and STAT5) and NF-κB (p65) in Caco-2 cells. However, IκB, an inhibitor of NF-κB, was not cleaved in Caco-2 cells following adherence of E. histolytica. Entamoeba-induced cleavage of STAT proteins and NF-κB was partially inhibited by pretreatment of cells with a cell-permeable calpain inhibitor, calpeptin. In contrast, E. histolytica did not induce cleavage of caspase-3 in Caco-2 cells. Furthermore, pretreatment of Caco-2 cells with a calpain inhibitor, calpeptin (but not the pan-caspase inhibitor, z-VAD-fmk) or m-calpain siRNA partially reduced Entamoeba-induced DNA fragmentation in Caco-2 cells. These results suggest that calpain plays an important role in E. histolytica-induced degradation of NF-κB and STATs in colonic epithelial cells, which ultimately accelerates cell death.
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Affiliation(s)
- Kyeong Ah Kim
- Department of Environmental Medical Biology, Institute of Tropical Medicine, Yonsei University College of Medicine, Seoul 120-752, Korea
| | - Arim Min
- Department of Environmental Medical Biology, Institute of Tropical Medicine, Yonsei University College of Medicine, Seoul 120-752, Korea
| | - Young Ah Lee
- Department of Environmental Medical Biology, Institute of Tropical Medicine, Yonsei University College of Medicine, Seoul 120-752, Korea
| | - Myeong Heon Shin
- Department of Environmental Medical Biology, Institute of Tropical Medicine, Yonsei University College of Medicine, Seoul 120-752, Korea
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Lee YA, Kim KA, Min A, Shin MH. Amoebic PI3K and PKC is required for Jurkat T cell death induced by Entamoeba histolytica. THE KOREAN JOURNAL OF PARASITOLOGY 2014; 52:355-65. [PMID: 25246714 PMCID: PMC4170031 DOI: 10.3347/kjp.2014.52.4.355] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/19/2014] [Revised: 05/29/2014] [Accepted: 06/04/2014] [Indexed: 01/01/2023]
Abstract
The enteric protozoan parasite Entamoeba histolytica is the causative agent of human amebiasis. During infection, adherence of E. histolytica through Gal/GalNAc lectin on the surface of the amoeba can induce caspase-3-dependent or -independent host cell death. Phosphorylinositol 3-kinase (PI3K) and protein kinase C (PKC) in E. histolytica play an important function in the adhesion, killing, or phagocytosis of target cells. In this study, we examined the role of amoebic PI3K and PKC in amoeba-induced apoptotic cell death in Jurkat T cells. When Jurkat T cells were incubated with E. histolytica trophozoites, phosphatidylserine (PS) externalization and DNA fragmentation in Jurkat cells were markedly increased compared to those of cells incubated with medium alone. However, when amoebae were pretreated with a PI3K inhibitor, wortmannin before being incubated with E. histolytica, E. histolytica-induced PS externalization and DNA fragmentation in Jurkat cells were significantly reduced compared to results for amoebae pretreated with DMSO. In addition, pretreatment of amoebae with a PKC inhibitor, staurosporine strongly inhibited Jurkat T cell death. However, E. histolytica-induced cleavage of caspase-3, -6, and -7 were not inhibited by pretreatment of amoebae with wortmannin or staurosporin. In addition, we found that amoebic PI3K and PKC have an important role on amoeba adhesion to host compartment. These results suggest that amebic PI3K and PKC activation may play an important role in caspase-independent cell death in Entamoeba-induced apoptosis.
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Affiliation(s)
- Young Ah Lee
- Department of Environmental Medical Biology and Institute of Tropical Medicine, Yonsei University College of Medicine, Seoul 120-752, Korea
| | - Kyeong Ah Kim
- Department of Environmental Medical Biology and Institute of Tropical Medicine, Yonsei University College of Medicine, Seoul 120-752, Korea
| | - Arim Min
- Department of Environmental Medical Biology and Institute of Tropical Medicine, Yonsei University College of Medicine, Seoul 120-752, Korea
| | - Myeong Heon Shin
- Department of Environmental Medical Biology and Institute of Tropical Medicine, Yonsei University College of Medicine, Seoul 120-752, Korea
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Kepka M, Verburg-van Kemenade BML, Homa J, Chadzinska M. Mechanisms involved in apoptosis of carp leukocytes upon in vitro and in vivo immunostimulation. FISH & SHELLFISH IMMUNOLOGY 2014; 39:386-395. [PMID: 24925760 DOI: 10.1016/j.fsi.2014.05.041] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2014] [Revised: 05/15/2014] [Accepted: 05/30/2014] [Indexed: 06/03/2023]
Abstract
During inflammation leukocyte activity must be carefully regulated, as high concentrations and/or prolonged action of pro-inflammatory mediators e.g. reactive oxygen species (ROS) can be detrimental not only for pathogens but also for host tissues. Programmed cell death - apoptosis is a most effective regulatory mechanism for down regulation of leukocyte activity, but little is known about this process in fish. We aimed to reveal the mechanisms of initiation and regulation of apoptosis in carp neutrophilic granulocytes and macrophages. During zymosan-induced peritonitis in carp, activated inflammatory neutrophilic granulocytes and monocytes/macrophages died by apoptosis. This correlated with a strong production of ROS, but pretreatment of the fish with NADPH oxidase inhibitor only slightly decreased late apoptosis. Interestingly in vitro incubation with zymosan or phorbol ester, but not lipopolisaccharide and poli I:C induced apoptosis of head kidney neutrophilic granulocytes. This coincided with loss of mitochondrial membrane potential. Moreover, in zymosan-stimulated neutrophilic granulocytes NADPH oxidase inhibitor not only reduced the production of ROS but also apoptosis. A similar effect was not observed in cells stimulated with phorbol ester, where DPI reduced ROS production, but not apoptosis. In PMA-stimulated neutrophilic granulocytes both the respiratory burst and apoptosis were reduced by protein kinase inhibitor. Furthermore, a short neutrophil stimulation either with PMA or with zymosan did induce caspase-independent apoptosis. These results show that in carp, apoptosis is an important regulatory process during in vitro and in vivo immunostimulation. In neutrophils, protein kinase, but not NADPH oxidase, is involved in PMA-induced apoptosis while apoptosis induced by zymosan is ROS-dependent.
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Affiliation(s)
- M Kepka
- Department of Evolutionary Immunology, Jagiellonian University, Gronostajowa 9, PL30-387, Krakow, Poland
| | - B M L Verburg-van Kemenade
- Cell Biology and Immunology Group, Dept of Animal Sciences, Wageningen University, P.O. Box 338, 6700 AH, Wageningen, The Netherlands
| | - J Homa
- Department of Evolutionary Immunology, Jagiellonian University, Gronostajowa 9, PL30-387, Krakow, Poland
| | - M Chadzinska
- Department of Evolutionary Immunology, Jagiellonian University, Gronostajowa 9, PL30-387, Krakow, Poland.
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Talamás-Lara D, Chávez-Munguía B, González-Robles A, Talamás-Rohana P, Salazar-Villatoro L, Durán-Díaz Á, Martínez-Palomo A. Erythrophagocytosis in Entamoeba histolytica and Entamoeba dispar: a comparative study. BIOMED RESEARCH INTERNATIONAL 2014; 2014:626259. [PMID: 25003123 PMCID: PMC4066688 DOI: 10.1155/2014/626259] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2014] [Revised: 05/09/2014] [Accepted: 05/09/2014] [Indexed: 01/08/2023]
Abstract
Entamoeba histolytica is the causative agent of human intestinal and liver amebiasis. The extraordinary phagocytic activity of E. histolytica trophozoites has been accepted as one of the virulence mechanisms responsible for their invasive capacity. The recognition of the noninvasive Entamoeba dispar as a different species has raised the question as to whether the lack of pathogenic potential of this ameba correlates with a limited phagocytic capacity. We have therefore compared the process of erythrophagocytosis in both species by means of light and video microscopy, hemoglobin measurement, and the estimation of reactive oxygen species (ROS). In the present study, we confirmed that E. dispar has lower erythrophagocytic capacity. We also observed by video microscopy a new event of erythrocyte opsonization-like in both species, being more characteristic in E. histolytica. Moreover, E. dispar showed a lower capacity to produce ROS compared with the invasive species and also showed a large population of amoebae that did not engulf any erythrocyte over time. Our results demonstrate that E. histolytica has a higher phagocytic capacity than E. dispar, including a higher rate of production of ROS in the course of ingesting red blood cells.
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Affiliation(s)
- Daniel Talamás-Lara
- Department of Infectomics and Molecular Pathogenesis, Center for Research and Advanced Studies, IPN, Avenida Instituto Politécnico Nacional No. 2508, Colonia San Pedro Zacatenco, Delegación Gustavo A. Madero, 07360 Mexico City, DF, Mexico
| | - Bibiana Chávez-Munguía
- Department of Infectomics and Molecular Pathogenesis, Center for Research and Advanced Studies, IPN, Avenida Instituto Politécnico Nacional No. 2508, Colonia San Pedro Zacatenco, Delegación Gustavo A. Madero, 07360 Mexico City, DF, Mexico
| | - Arturo González-Robles
- Department of Infectomics and Molecular Pathogenesis, Center for Research and Advanced Studies, IPN, Avenida Instituto Politécnico Nacional No. 2508, Colonia San Pedro Zacatenco, Delegación Gustavo A. Madero, 07360 Mexico City, DF, Mexico
| | - Patricia Talamás-Rohana
- Department of Infectomics and Molecular Pathogenesis, Center for Research and Advanced Studies, IPN, Avenida Instituto Politécnico Nacional No. 2508, Colonia San Pedro Zacatenco, Delegación Gustavo A. Madero, 07360 Mexico City, DF, Mexico
| | - Lizbeth Salazar-Villatoro
- Department of Infectomics and Molecular Pathogenesis, Center for Research and Advanced Studies, IPN, Avenida Instituto Politécnico Nacional No. 2508, Colonia San Pedro Zacatenco, Delegación Gustavo A. Madero, 07360 Mexico City, DF, Mexico
| | - Ángel Durán-Díaz
- Faculty of Superior Studies Iztacala, Biology, UNAM, Los Reyes Iztacala, 54090 Tlalnepantla, MEX, Mexico
| | - Adolfo Martínez-Palomo
- Department of Infectomics and Molecular Pathogenesis, Center for Research and Advanced Studies, IPN, Avenida Instituto Politécnico Nacional No. 2508, Colonia San Pedro Zacatenco, Delegación Gustavo A. Madero, 07360 Mexico City, DF, Mexico
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Monturiol-Gross L, Flores-Díaz M, Pineda-Padilla MJ, Castro-Castro AC, Alape-Giron A. Clostridium perfringens phospholipase C induced ROS production and cytotoxicity require PKC, MEK1 and NFκB activation. PLoS One 2014; 9:e86475. [PMID: 24466113 PMCID: PMC3900566 DOI: 10.1371/journal.pone.0086475] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2013] [Accepted: 12/11/2013] [Indexed: 02/07/2023] Open
Abstract
Clostridium perfringens phospholipase C (CpPLC), also called α-toxin, is the most toxic extracellular enzyme produced by this bacteria and is essential for virulence in gas gangrene. At lytic concentrations, CpPLC causes membrane disruption, whereas at sublytic concentrations this toxin causes oxidative stress and activates the MEK/ERK pathway, which contributes to its cytotoxic and myotoxic effects. In the present work, the role of PKC, ERK 1/2 and NFκB signalling pathways in ROS generation induced by CpPLC and their contribution to CpPLC-induced cytotoxicity was evaluated. The results demonstrate that CpPLC induces ROS production through PKC, MEK/ERK and NFκB pathways, the latter being activated by the MEK/ERK signalling cascade. Inhibition of either of these signalling pathways prevents CpPLC's cytotoxic effect. In addition, it was demonstrated that NFκB inhibition leads to a significant reduction in the myotoxicity induced by intramuscular injection of CpPLC in mice. Understanding the role of these signalling pathways could lead towards developing rational therapeutic strategies aimed to reduce cell death during a clostridialmyonecrosis.
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Affiliation(s)
- Laura Monturiol-Gross
- Instituto Clodomiro Picado, Facultad de Microbiología, Universidad de Costa Rica, San José, Costa Rica
| | - Marietta Flores-Díaz
- Instituto Clodomiro Picado, Facultad de Microbiología, Universidad de Costa Rica, San José, Costa Rica
| | - Maria Jose Pineda-Padilla
- Instituto Clodomiro Picado, Facultad de Microbiología, Universidad de Costa Rica, San José, Costa Rica
| | | | - Alberto Alape-Giron
- Instituto Clodomiro Picado, Facultad de Microbiología, Universidad de Costa Rica, San José, Costa Rica
- Departamento de Bioquímica, Escuela de Medicina, Universidad de Costa Rica, San José, Costa Rica
- Centro de investigación en estructuras microscópicas, Universidad de Costa Rica, San José, Costa Rica
- * E-mail:
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Wang YC, Lin C, Chuang MT, Hsieh WP, Lan CY, Chuang YJ, Chen BS. Interspecies protein-protein interaction network construction for characterization of host-pathogen interactions: a Candida albicans-zebrafish interaction study. BMC SYSTEMS BIOLOGY 2013; 7:79. [PMID: 23947337 PMCID: PMC3751520 DOI: 10.1186/1752-0509-7-79] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/18/2013] [Accepted: 08/14/2013] [Indexed: 11/10/2022]
Abstract
Background Despite clinical research and development in the last decades, infectious diseases remain a top global problem in public health today, being responsible for millions of morbidities and mortalities each year. Therefore, many studies have sought to investigate host-pathogen interactions from various viewpoints in attempts to understand pathogenic and defensive mechanisms, which could help control pathogenic infections. However, most of these efforts have focused predominately on the host or the pathogen individually rather than on a simultaneous analysis of both interaction partners. Results In this study, with the help of simultaneously quantified time-course Candida albicans-zebrafish interaction transcriptomics and other omics data, a computational framework was developed to construct the interspecies protein-protein interaction (PPI) network for C. albicans-zebrafish interactions based on the inference of ortholog-based PPIs and the dynamic modeling of regulatory responses. The identified C. albicans-zebrafish interspecies PPI network highlights the association between C. albicans pathogenesis and the zebrafish redox process, indicating that redox status is critical in the battle between the host and pathogen. Conclusions Advancing from the single-species network construction method, the interspecies network construction approach allows further characterization and elucidation of the host-pathogen interactions. With continued accumulation of interspecies transcriptomics data, the proposed method could be used to explore progressive network rewiring over time, which could benefit the development of network medicine for infectious diseases.
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Affiliation(s)
- Yu-Chao Wang
- Laboratory of Control and Systems Biology, Department of Electrical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
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Life of neutrophil: From stem cell to neutrophil extracellular trap. Respir Physiol Neurobiol 2013; 187:68-73. [DOI: 10.1016/j.resp.2013.02.023] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2012] [Revised: 02/23/2013] [Accepted: 02/25/2013] [Indexed: 12/16/2022]
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Demeyere K, Remijsen Q, Demon D, Breyne K, Notebaert S, Boyen F, Guérin CJ, Vandenabeele P, Meyer E. Escherichia coli induces bovine neutrophil cell death independent from caspase-3/-7/-1, but with phosphatidylserine exposure prior to membrane rupture. Vet Immunol Immunopathol 2013; 153:45-56. [PMID: 23510559 DOI: 10.1016/j.vetimm.2013.02.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2012] [Revised: 01/11/2013] [Accepted: 02/04/2013] [Indexed: 12/20/2022]
Abstract
Neutrophils are essential for the innate immune response against bacterial pathogens and play a key role during the early phases of infection, including mastitis and endometritis in cows. When directly challenged with bacteria, neutrophils undergo phagocytosis induced cell death (PICD). The molecular mechanisms of this cell death modality are poorly understood, especially for bovine neutrophils. Therefore, this study aimed to determine the mechanisms and hallmarks of PICD in bovine neutrophils after in vitro challenge with Escherichia coli (E. coli). Our data show that various apoptotic hallmarks such as blebbing, chromatin condensation and executioner caspase (C)-3/-7 activity are only observed during constitutive bovine neutrophil apoptosis. In contrast, bovine neutrophil PICD is characterized by production of reactive oxygen species (ROS), pro-inflammatory C-1 activation, nuclear factor (NF)-κB activation, and interleukin (IL)-1β and IL-6 secretion. Nevertheless, under both conditions these phagocytes undergo cell death with the exposure of phosphatidylserine (PS). Although PS exposure is generally attributed to the anti-inflammatory features of executioner caspase-dependent apoptosis, it surprisingly preceded plasma membrane rupture during bovine neutrophil PICD. Moreover, C-1 inhibition strongly affected IL-1β production but not the PICD kinetics. This indicates that the secretion of the latter pro-inflammatory cytokine is a bystander effect rather than a regulator of PICD in bovine neutrophils, in marked contrast to the IL-1β-dependent pyroptosis reported for macrophages.
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Affiliation(s)
- Kristel Demeyere
- Laboratory of Biochemistry, Department of Pharmacology, Toxicology and Biochemistry, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium.
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Kim KA, Kim JY, Lee YA, Min A, Bahk YY, Shin MH. Entamoeba histolytica induces cell death of HT29 colonic epithelial cells via NOX1-derived ROS. THE KOREAN JOURNAL OF PARASITOLOGY 2013; 51:61-8. [PMID: 23467460 PMCID: PMC3587751 DOI: 10.3347/kjp.2013.51.1.61] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/31/2012] [Revised: 11/26/2012] [Accepted: 12/04/2012] [Indexed: 12/16/2022]
Abstract
Entamoeba histolytica, which causes amoebic colitis and occasionally liver abscess in humans, is able to induce host cell death. However, signaling mechanisms of colon cell death induced by E. histolytica are not fully elucidated. In this study, we investigated the signaling role of NOX in cell death of HT29 colonic epithelial cells induced by E. histolytica. Incubation of HT29 cells with amoebic trophozoites resulted in DNA fragmentation that is a hallmark of apoptotic cell death. In addition, E. histolytica generate intracellular reactive oxygen species (ROS) in a contact-dependent manner. Inhibition of intracellular ROS level with treatment with DPI, an inhibitor of NADPH oxidases (NOXs), decreased Entamoeba-induced ROS generation and cell death in HT29 cells. However, pan-caspase inhibitor did not affect E. histolytica-induced HT29 cell death. In HT29 cells, catalytic subunit NOX1 and regulatory subunit Rac1 for NOX1 activation were highly expressed. We next investigated whether NADPH oxidase 1 (NOX1)-derived ROS is closely associated with HT29 cell death induced by E. histolytica. Suppression of Rac1 by siRNA significantly inhibited Entamoeba-induced cell death. Moreover, knockdown of NOX1 by siRNA, effectively inhibited E. histolytica-triggered DNA fragmentation in HT29 cells. These results suggest that NOX1-derived ROS is required for apoptotic cell death in HT29 colon epithelial cells induced by E. histolytica.
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Affiliation(s)
- Kyeong Ah Kim
- Department of Environmental Medical Biology, Yonsei University College of Medicine, Seoul 120-752, Korea
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Gabelloni ML, Trevani AS, Sabatté J, Geffner J. Mechanisms regulating neutrophil survival and cell death. Semin Immunopathol 2013; 35:423-37. [PMID: 23370701 DOI: 10.1007/s00281-013-0364-x] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2012] [Accepted: 01/17/2013] [Indexed: 12/19/2022]
Abstract
Neutrophils not only play a critical role as a first line of defense against bacteria and fungi infections but also contribute to tissue injury associated with autoimmune and inflammatory diseases. Neutrophils are rapidly and massively recruited from the circulation into injured tissues displaying an impressive arsenal of toxic weapons. Although effective in their ability to kill pathogens, these weapons were equally effective to induce tissue damage. Therefore, the inflammatory activity of neutrophils must be regulated with exquisite precision and timing, a task mainly achieved through a complex network of mechanisms, which regulate neutrophil survival. Neutrophils have the shortest lifespan among leukocytes and usually die via apoptosis although new forms of cell death have been characterized over the last few years. The lifespan of neutrophils can be dramatically modulated by a large variety of agents such as cytokines, pathogens, danger-associated molecular patterns as well as by pharmacological manipulation. Recent findings shed light about the complex mechanisms responsible for the regulation of neutrophil survival in different physiological, pathological, and pharmacological scenarios. Here, we provide an updated review on the current knowledge and new findings in this field and discuss novel strategies that could be used to drive the resolution of neutrophil-mediated inflammatory diseases.
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Affiliation(s)
- María Laura Gabelloni
- Instituto de Medicina Experimental IMEX, Academia Nacional de Medicina, Buenos Aires, Argentina
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Keshari RS, Verma A, Barthwal MK, Dikshit M. Reactive oxygen species-induced activation of ERK and p38 MAPK mediates PMA-induced NETs release from human neutrophils. J Cell Biochem 2013; 114:532-40. [DOI: 10.1002/jcb.24391] [Citation(s) in RCA: 172] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2012] [Accepted: 08/30/2012] [Indexed: 01/27/2023]
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