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Techarang T, Jariyapong P, Punsawad C. Role of sphingosine kinase and sphingosine-1-phosphate receptor in the liver pathology of mice infected with Plasmodium berghei ANKA. PLoS One 2022; 17:e0266055. [PMID: 35333897 PMCID: PMC8956183 DOI: 10.1371/journal.pone.0266055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Accepted: 03/14/2022] [Indexed: 11/19/2022] Open
Abstract
Decreased serum sphingosine 1-phosphate (S1P) has been reported in severe malaria patients, but the expression of receptors and enzymes associated with S1P has not been investigated in the liver of malaria patients. Therefore, this study aimed to investigate the expression of sphingosine kinase (SphK) and S1P receptors (S1PRs) in the liver of malaria-infected mice. C57BL/6 male mice were divided into a control group (n = 10) and a Plasmodium berghei (PbA)-infected group (n = 10). Mice in the malaria group were intraperitoneally injected with 1×106P. berghei ANKA-infected red blood cells, whereas control mice were intraperitoneally injected with normal saline. Liver tissues were collected on Day 13 of the experiment to evaluate histopathological changes by hematoxylin and eosin staining and to investigate SphK and S1PR expression by immunohistochemistry and real-time PCR. Histological examination of liver tissues from the PbA-infected group revealed sinusoidal dilatation, hemozoin deposition, portal tract inflammation and apoptotic hepatocytes, which were absent in the control group. Immunohistochemical staining showed significant increases in the expression of SphK1 and SphK2 and significant decreases in the expression of S1PR1, S1PR2, and S1PR3 in the endothelium, hepatocytes, and Kupffer cells in liver tissue from the PbA-infected group compared with the control group. Real-time PCR analysis showed the upregulation of SphK1 and the downregulation of S1PR1, S1PR2, and S1PR3 in the liver in the PbA-infected group compared with the control group. In conclusion, this study demonstrates for the first time that SphK1 mRNA expression is upregulated and that S1PR1, S1PR2, and S1PR3 expression is decreased in the liver tissue of PbA-infected mice. Our findings suggest that the decreased levels of S1PR1, S1PR2, and S1PR3 might play an important role in liver injury during malaria infection.
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Affiliation(s)
- Tachpon Techarang
- Department of Medical Science, School of Medicine, Walailak University, Nakhon Si Thammarat, Thailand
| | - Pitchanee Jariyapong
- Department of Medical Science, School of Medicine, Walailak University, Nakhon Si Thammarat, Thailand
| | - Chuchard Punsawad
- Department of Medical Science, School of Medicine, Walailak University, Nakhon Si Thammarat, Thailand
- Research Center in Tropical Pathobiology, Walailak University, Nakhon Si Thammarat, Thailand
- * E-mail:
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Borges TKS, Alves ÉAR, Vasconcelos HAR, Carneiro FP, Nicola AM, Magalhães KG, Muniz-Junqueira MI. Differences in the modulation of reactive species, lipid bodies, cyclooxygenase-2, 5-lipoxygenase and PPAR-γ in cerebral malaria-susceptible and resistant mice. Immunobiology 2016; 222:604-619. [PMID: 27887739 DOI: 10.1016/j.imbio.2016.11.010] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2016] [Accepted: 11/15/2016] [Indexed: 12/13/2022]
Abstract
Proinflammatory responses are associated with the severity of cerebral malaria. NO, H2O2, eicosanoid and PPAR-γ are involved in proinflammatory responses, but regulation of these factors is unclear in malaria. This work aimed to compare the expression of eicosanoid-forming-enzymes in cerebral malaria-susceptible CBA and C57BL/6 and -resistant BALB/c mice. Mice were infected with Plasmodium berghei ANKA, and the survival rates and parasitemia curves were assessed. On the sixth day post-infection, cyclooxygenase-2 and 5-lipoxygenase in brain sections were assessed by immunohistochemistry, and, NO, H2O2, lipid bodies, and PPAR-γ expression were assessed in peritoneal macrophages. The C57BL/6 had more severe disease with a lower survival time, higher parasitemia and lower production of plasmodicidal NO and H2O2 molecules than BALB/c. Enhanced COX-2 and 5-LOX expression were observed in brain tissue cells and vessels from C57BL/6 mice, and these mice expressed higher constitutive PPAR-γ levels. There was no translocation of PPAR-γ from cytoplasm to nucleus in macrophages from these mice. CBA mice had enhanced COX-2 expression in brain tissue cells and vessels and also lacked PPAR-γ cytoplasm-to-nucleus translocation. The resistant BALB/c mice presented higher survival time, lower parasitemia and higher NO and H2O2 production on the sixth day post-infection. These mice did not express either COX-2 or 5-LOX in brain tissue cells and vessels. Our data showed that besides the high parasite burden and lack of microbicidal molecules, an imbalance with high COX-2 and 5-LOX eicosanoid expression and a lack of regulatory PPAR-γ cytoplasm-to-nucleus translocation in macrophages were observed in mice that develop cerebral malaria.
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Affiliation(s)
- Tatiana K S Borges
- Laboratory of Cellular Immunology, Pathology, Faculty of Medicine, University of Brasilia, Campus Darcy Ribeiro, Brasilia, Distrito Federal 70.910.900, Brazil
| | - Érica A R Alves
- Laboratory of Cellular Immunology, Pathology, Faculty of Medicine, University of Brasilia, Campus Darcy Ribeiro, Brasilia, Distrito Federal 70.910.900, Brazil; Laboratory of Cellular and Molecular Immunology, René Rachou Research Center, Belo Horizonte, Minas Gerais 30.190.002 Brazil
| | - Henda A R Vasconcelos
- Laboratory of Cellular Immunology, Pathology, Faculty of Medicine, University of Brasilia, Campus Darcy Ribeiro, Brasilia, Distrito Federal 70.910.900, Brazil; National Direction of Public Health, Ministry of Health of the Republic of Angola, Luanda, Angola
| | - Fabiana P Carneiro
- Laboratory of Pathology, Pathology, Faculty of Medicine, University of Brasilia, Campus Darcy Ribeiro, Brasilia, Distrito Federal 70.910.900, Brazil
| | - André M Nicola
- Laboratory of Cellular Immunology, Pathology, Faculty of Medicine, University of Brasilia, Campus Darcy Ribeiro, Brasilia, Distrito Federal 70.910.900, Brazil
| | - Kelly G Magalhães
- Laboratory of Immunology and Inflammation, Department of Cellular Biology, Biology Institute, University of Brasilia, Campus Darcy Ribeiro, Brasilia, Distrito Federal 70.910.900, Brazil
| | - Maria Imaculada Muniz-Junqueira
- Laboratory of Cellular Immunology, Pathology, Faculty of Medicine, University of Brasilia, Campus Darcy Ribeiro, Brasilia, Distrito Federal 70.910.900, Brazil.
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Ribeiro-Dias F, Tosta CE. Dynamics and kinetics of natural killer cell cytotoxicity in human malaria as evaluated by a novel stepwise cytotoxicity assay. Rev Soc Bras Med Trop 2006; 39:357-64. [PMID: 17119751 DOI: 10.1590/s0037-86822006000400008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2004] [Accepted: 07/27/2006] [Indexed: 11/21/2022] Open
Abstract
Malaria causes important functional alterations of the immune system, but several of them are poorly defined. To evaluate thoroughly the natural killer cell cytotoxicity in patients with malaria, we developed a technique capable to assess both the dynamics and the kinetics of the process. For the kinetics assay, human peripheral blood mononuclear cells were previously incubated with K562 cells and kept in agarose medium, while for the dynamics assay both cells were maintained in suspension. NK activity from patients with vivax malaria presented a kinetics profile faster than those with falciparum malaria. NK cytotoxicity positively correlated with parasitemia in falciparum malaria. The dynamics of NK cytotoxicity of healthy individuals was elevated at the beginning of the process and then significantly decreased. In contrast, malaria patients presented successive peaks of NK activity. Our results confirmed the occurrence of alteration in NK cell function during malaria, and added new data about the NK cytotoxicity process.
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MESH Headings
- Acute Disease
- Adolescent
- Adult
- Animals
- Case-Control Studies
- Cytotoxicity Tests, Immunologic/methods
- Cytotoxicity, Immunologic/immunology
- Cytotoxicity, Immunologic/physiology
- Female
- Humans
- Killer Cells, Natural/immunology
- Killer Cells, Natural/physiology
- Kinetics
- Leukocytes, Mononuclear/immunology
- Leukocytes, Mononuclear/parasitology
- Malaria, Falciparum/immunology
- Malaria, Falciparum/parasitology
- Malaria, Vivax/immunology
- Malaria, Vivax/parasitology
- Male
- Middle Aged
- Parasitemia/immunology
- Time Factors
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Affiliation(s)
- Fátima Ribeiro-Dias
- Area de Patologia, Laboratório de Imunologia Celular, Faculdade de Medicina, Universidade de Brasília, Brasília, DF
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Keller CC, Hittner JB, Nti BK, Weinberg JB, Kremsner PG, Perkins DJ. Reduced peripheral PGE2 biosynthesis in Plasmodium falciparum malaria occurs through hemozoin-induced suppression of blood mononuclear cell cyclooxygenase-2 gene expression via an interleukin-10-independent mechanism. Mol Med 2005; 10:45-54. [PMID: 15502882 PMCID: PMC1431354 DOI: 10.2119/2004-00035.perkins] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Molecular immunologic determinants of disease severity during Plasmodium falciparum malaria are largely undetermined. Our recent investigations showed that peripheral blood mononuclear cell (PBMC) cyclooxygenase-2 (COX-2) gene expression and plasma prostaglandin E(2) (PGE(2)) production are suppressed in children with falciparum malaria relative to healthy, malaria-exposed children with partial immunity. Furthermore, decreased COX-2/PGE(2) levels were significantly associated with increased plasma interleukin-10 (IL-10), an anti-inflammatory cytokine that inhibits the expression of COX-2 gene products. To determine the mechanism(s) responsible for COX-2-derived PGE(2) suppression, PBMCs were cultured from children with falciparum malaria. PGE(2) production was suppressed under baseline and COX-2-promoting conditions (stimulation with lipopolysaccharide [LPS] and interferon [IFN]-gamma) over prolonged periods, suggesting that an in vivo-derived product(s) was responsible for reduced PGE(2) biosynthesis. Ingestion of hemozoin (malarial pigment) by PBMC was investigated as a source of COX-2/PGE(2) suppression in PBMCs from healthy, malaria-naive adults. In addition, synthetically prepared hemozoin, beta-hematin, was used to investigate the effects of the core iron component of hemozoin, ferriprotoporphyrin-IX (FPIX). Physiologic concentrations of hemozoin or b-hematin suppressed LPS- and IFN-gamma-induced COX-2 mRNA in a time- and dose-dependent manner, resulting in decreased COX-2 protein and PGE(2) production. Suppression of COX-2/PGE(2) by hemozoin was not due to decreased cell viability as evidenced by examination of mitochondrial bioactivity. These data illustrate that ingestion of FPIX by blood mononuclear cells is responsible for suppression of COX-2/PGE(2). Although hemozoin induced overproduction of IL-10, neutralizing IL-10 antibodies failed to restore PGE(2) production. Thus, acquisition of hemozoin by blood mononuclear cells is responsible for suppression of PGE(2) in malaria through inhibition of de novo COX-2 transcripts via molecular mechanisms independent of increased IL-10 production.
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Affiliation(s)
- Christopher C Keller
- Department of Infectious Diseases and Microbiology, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - James B Hittner
- Department of Psychology, College of Charleston, Charleston, South Carolina, USA
| | - Benjamin K Nti
- Department of Infectious Diseases and Microbiology, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - J Brice Weinberg
- Department of Medicine, VA and Duke University Medical Centers, Durham, North Carolina, USA
| | - Peter G Kremsner
- Medical Research Unit, Albert Schweitzer Hospital, Lambaréné, Gabon
- Department of Parasitology, Institute for Tropical Medicine, University of Tübingen, Germany
| | - Douglas J Perkins
- Department of Infectious Diseases and Microbiology, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
- Address correspondence and reprint requests to Douglas Jay Perkins, University of Pittsburgh, Graduate School of Public Health, Department of Infectious Diseases and Microbiology, 130 DeSoto Street, 603 Parran Hall, Pittsburgh, PA 15261. Phone: 412-624-5894; fax 412-624-4953; e-mail:
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