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Castoldi A, Sanin DE, van Teijlingen Bakker N, Aguiar CF, de Brito Monteiro L, Rana N, Grzes KM, Kabat AM, Curtis J, Cameron AM, Caputa G, Antônio de Souza T, Souto FO, Buescher JM, Edwards-Hicks J, Pearce EL, Pearce EJ, Saraiva Camara NO. Metabolic and functional remodeling of colonic macrophages in response to high-fat diet-induced obesity. iScience 2023; 26:107719. [PMID: 37674984 PMCID: PMC10477064 DOI: 10.1016/j.isci.2023.107719] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Revised: 07/17/2023] [Accepted: 08/22/2023] [Indexed: 09/08/2023] Open
Abstract
Little is known about the effects of high-fat diet (HFD)-induced obesity on resident colonic lamina propria (LP) macrophages (LPMs) function and metabolism. Here, we report that obesity and diabetes resulted in increased macrophage infiltration in the colon. These macrophages exhibited the residency phenotype CX3CR1hiMHCIIhi and were CD4-TIM4-. During HFD, resident colonic LPM exhibited a lipid metabolism gene expression signature that overlapped that used to define lipid-associated macrophages (LAMs). Via single-cell RNA sequencing, we identified a sub-cluster of macrophages, increased in HFD, that were responsible for the LAM signature. Compared to other macrophages in the colon, these cells were characterized by elevated glycolysis, phagocytosis, and efferocytosis signatures. CX3CR1hiMHCIIhi colonic resident LPMs had fewer lipid droplets (LDs) and decreased triacylglycerol (TG) content compared to equivalent cells in lean mice and exhibited increased phagocytic capacity, suggesting that HFD induces adaptive responses in LPMs to limit bacterial translocation.
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Affiliation(s)
- Angela Castoldi
- Department of Immunology, University of Sao Paulo, Sao Paulo, Brazil
- Department of Immunometabolism, Max Planck Institute of Immunobiology and Epigenetics, Freiburg im Breisgau, Germany
- Institute Keizo Asami, Federal University of Pernambuco, Pernambuco, Brazil
| | - David E. Sanin
- Department of Immunometabolism, Max Planck Institute of Immunobiology and Epigenetics, Freiburg im Breisgau, Germany
- Bloomberg-Kimmel Institute for Cancer Immunotherapy, Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Nikki van Teijlingen Bakker
- Department of Immunometabolism, Max Planck Institute of Immunobiology and Epigenetics, Freiburg im Breisgau, Germany
| | | | - Lauar de Brito Monteiro
- Department of Immunometabolism, Max Planck Institute of Immunobiology and Epigenetics, Freiburg im Breisgau, Germany
| | - Nisha Rana
- Department of Immunometabolism, Max Planck Institute of Immunobiology and Epigenetics, Freiburg im Breisgau, Germany
| | - Katarzyna M. Grzes
- Department of Immunometabolism, Max Planck Institute of Immunobiology and Epigenetics, Freiburg im Breisgau, Germany
- Bloomberg-Kimmel Institute for Cancer Immunotherapy, Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Agnieszka M. Kabat
- Department of Immunometabolism, Max Planck Institute of Immunobiology and Epigenetics, Freiburg im Breisgau, Germany
- Bloomberg-Kimmel Institute for Cancer Immunotherapy, Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Jonathan Curtis
- Department of Immunometabolism, Max Planck Institute of Immunobiology and Epigenetics, Freiburg im Breisgau, Germany
- Bloomberg-Kimmel Institute for Cancer Immunotherapy, Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Alanna M. Cameron
- Department of Immunometabolism, Max Planck Institute of Immunobiology and Epigenetics, Freiburg im Breisgau, Germany
| | - George Caputa
- Department of Immunometabolism, Max Planck Institute of Immunobiology and Epigenetics, Freiburg im Breisgau, Germany
| | | | - Fabrício O. Souto
- Institute Keizo Asami, Federal University of Pernambuco, Pernambuco, Brazil
| | - Joerg M. Buescher
- Metabolomics Facility, Max Planck Institute of Epigenetics and Immunobiology, Freiburg im Breisgau, Germany
| | - Joy Edwards-Hicks
- Department of Immunometabolism, Max Planck Institute of Immunobiology and Epigenetics, Freiburg im Breisgau, Germany
| | - Erika L. Pearce
- Department of Immunometabolism, Max Planck Institute of Immunobiology and Epigenetics, Freiburg im Breisgau, Germany
- Bloomberg-Kimmel Institute for Cancer Immunotherapy, Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Edward J. Pearce
- Department of Immunometabolism, Max Planck Institute of Immunobiology and Epigenetics, Freiburg im Breisgau, Germany
- Bloomberg-Kimmel Institute for Cancer Immunotherapy, Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
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Souto FO, Castanheira FVS, Trevelin SC, Lima BHF, Cebinelli GCM, Turato WM, Auxiliadora-Martins M, Basile-Filho A, Alves-Filho JC, Cunha FQ. Liver X Receptor Activation Impairs Neutrophil Functions and Aggravates Sepsis. J Infect Dis 2021; 221:1542-1553. [PMID: 31783409 DOI: 10.1093/infdis/jiz635] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Accepted: 11/27/2019] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND Liver X receptors (LXRs) are nuclear receptors activated by oxidized lipids and were previously implicated in several metabolic development and inflammatory disorders. Although neutrophils express both LXR-α and LXR-β, the consequences of their activation, particularly during sepsis, remain unknown. METHODS We used the model of cecal ligation and puncture (CLP) to investigate the role of LXR activation during sepsis. RESULTS In this study, we verified that LXR activation reduces neutrophil chemotactic and killing abilities in vitro. Mice treated with LXR agonists showed higher sepsis-induced mortality, which could be associated with reduced neutrophil infiltration at the infectious foci, increased bacteremia, systemic inflammatory response, and multiorgan failure. In contrast, septic mice treated with LXR antagonist showed increased number of neutrophils in the peritoneal cavity, reduced bacterial load, and multiorgan dysfunction. More important, neutrophils from septic patients showed increased ABCA1 messenger ribonucleic acid levels (a marker of LXR activation) and impaired chemotactic response toward CXCL8 compared with cells from healthy individuals. CONCLUSIONS Therefore, our findings suggest that LXR activation impairs neutrophil functions, which might contribute to poor sepsis outcome.
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Affiliation(s)
- Fabrício O Souto
- Department of Biochemistry and Immunology, Ribeirao Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil.,Laboratory of Immunopathology Keizo Asami, Federal University of Pernambuco, Recife, Brazil
| | - Fernanda V S Castanheira
- Department of Pharmacology, Ribeirao Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil.,Center of Research of Inflammatory Diseases, Ribeirao Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Silvia C Trevelin
- Department of Pharmacology, Ribeirao Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil.,King's College London, British Heart Foundation Centre, School of Cardiovascular Medicine and Sciences, London, United Kingdom
| | - Braulio H F Lima
- Department of Pharmacology, Ribeirao Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | | | - Walter M Turato
- Department of Biochemistry and Immunology, Ribeirao Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Maria Auxiliadora-Martins
- Department of Pharmacology, Surgery and Anatomy, Ribeirao Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Anibal Basile-Filho
- Department of Pharmacology, Surgery and Anatomy, Ribeirao Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Jose Carlos Alves-Filho
- Department of Pharmacology, Ribeirao Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil.,Center of Research of Inflammatory Diseases, Ribeirao Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Fernando Q Cunha
- Department of Pharmacology, Ribeirao Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil.,Center of Research of Inflammatory Diseases, Ribeirao Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
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Mendonça MAO, Souto FO, Micheli DC, Alves-Filho JC, Cunha FQ, Murta EFC, Tavares-Murta BM. Mechanisms affecting neutrophil migration capacity in breast cancer patients before and after chemotherapy. Cancer Chemother Pharmacol 2013; 73:317-24. [PMID: 24258454 DOI: 10.1007/s00280-013-2348-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2013] [Accepted: 11/01/2013] [Indexed: 11/28/2022]
Abstract
PURPOSE To investigate the mechanisms affecting neutrophil migration capacity in breast cancer patients before and after chemotherapy. METHODS Peripheral venous blood was collected at the time of diagnosis and immediately prior to the 4th cycle of an anthracycline-based chemotherapy regimen for patients diagnosed with different stages of breast cancer (n = 30), for experimental assays. Blood samples were also collected from a healthy control group (n = 17). RESULTS IL-8 serum concentrations were higher in the patient group than in the control group (p = 0.02), and chemotherapy did not further affect this increase. Levels of TNF-α, IL-6, and IL-10 did not differ between controls and patients, or in relation to chemotherapy. Serum levels of nitric oxide (NO) metabolites were elevated following chemotherapy compared to levels detected prior to treatment (p = 0.01). When the supernatants of lipopolysaccharide-stimulated mononuclear cells and neutrophils obtained from the patients were assayed for levels of nitrite, these levels were significantly higher and unchanged, respectively, compared with controls. Expression levels of the chemokine receptors, CXCR1 and CXCR2, were significantly reduced in patients compared to controls, and chemotherapy did not further affect these differences. Furthermore, filamentous actin content for IL-8-activated neutrophils was reduced with chemotherapy (median 8.85; range 3.38-13.43) compared to the content detected prior to treatment (median 9.23; range 2.86-22.16) (p = 0.001). CONCLUSION Elevated systemic levels of IL-8 and NO, desensitization to CXCR activation, and reduction in actin polymerization may affect neutrophil motility in patients before and after chemotherapy.
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Carlos D, Spiller F, Souto FO, Trevelin SC, Borges VF, de Freitas A, Alves-Filho JC, Silva JS, Ryffel B, Cunha FQ. Histamine h2 receptor signaling in the pathogenesis of sepsis: studies in a murine diabetes model. J Immunol 2013; 191:1373-82. [PMID: 23817413 DOI: 10.4049/jimmunol.1202907] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Type 1 diabetes enhances susceptibility to infection and favors the sepsis development. In addition, diabetic mice produced higher levels of histamine in several tissues and in the blood after LPS stimulation than nondiabetic mice. In this study, we aimed to explore the role of mast cells (MCs) and histamine in neutrophil migration and, consequently, infection control in diabetic mice with mild sepsis (MS) induced by cecum ligation and puncture. We used female BALB/c, MC-sufficient (WB/B6), MC-deficient (W/W(v)), and NOD mice. Diabetic mice given MS displayed 100% mortality within 24 h, whereas all nondiabetic mice survived for at least 5 d. The mortality rate of diabetic mice was reduced to 57% after the depletion of MC granules with compound 48/80. Moreover, this pretreatment increased neutrophil migration to the focus of infection, which reduced systemic inflammatory response and bacteremia. The downregulation of CXCR2 and upregulation of G protein-coupled receptor kinase 2 in neutrophils was prevented by pretreatment of diabetic mice given MS with compound 48/80. In addition, blocking the histamine H2 receptor restored neutrophil migration, enhanced CXCR2 expression, decreased bacteremia, and improved sepsis survival in alloxan-induced diabetic and spontaneous NOD mice. Finally, diabetic W/W(v) mice had neutrophil migration to the peritoneal cavity, increased CXCR2 expression, and reduced bacteremia compared with diabetic WB/B6 mice. These results demonstrate that histamine released by MCs reduces diabetic host resistance to septic peritonitis in mice.
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Affiliation(s)
- Daniela Carlos
- Department of Pharmacology, School of Medicine of Ribeirão Preto, University of São Paulo, 14049-900 Ribeirão Preto, São Paulo, Brazil
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Spiller F, Carlos D, Souto FO, de Freitas A, Soares FS, Vieira SM, Paula FJ, Alves-Filho JC, Cunha FQ. α1-Acid glycoprotein decreases neutrophil migration and increases susceptibility to sepsis in diabetic mice. Diabetes 2012; 61:1584-91. [PMID: 22415874 PMCID: PMC3357278 DOI: 10.2337/db11-0825] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The mechanisms underlying immune deficiency in diabetes are largely unknown. In the present study, we demonstrate that diabetic mice are highly susceptible to polymicrobial sepsis due to reduction in rolling, adhesion, and migration of leukocytes to the focus of infection. In addition, after sepsis induction, CXCR2 was strongly downregulated in neutrophils from diabetic mice compared with nondiabetic mice. Furthermore, CXCR2 downregulation was associated with increased G-protein-coupled receptor kinase 2 (GRK2) expression in these cells. Different from nondiabetic mice, diabetic animals submitted to mild sepsis displayed a significant augment in α1-acid glycoprotein (AGP) hepatic mRNA expression and serum protein levels. Administration of AGP in nondiabetic mice subjected to mild sepsis inhibited the neutrophil migration to the focus of infection, as well as induced l-selectin shedding and rise in CD11b of blood neutrophils. Insulin treatment of diabetic mice reduced mortality rate, prevented the failure of neutrophil migration, impaired GRK2-mediated CXCR2 downregulation, and decreased the generation of AGP. Finally, administration of AGP abolished the effect of insulin treatment in diabetic mice. Together, these data suggest that AGP may be involved in reduction of neutrophil migration and increased susceptibility to sepsis in diabetic mice.
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Affiliation(s)
- Fernando Spiller
- Department of Pharmacology, Biological Sciences Center, Federal University of Santa Catarina, Florianópolis, Santa Catarina, Brazil
| | - Daniela Carlos
- Department of Pharmacology, School of Medicine Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Fabrício O. Souto
- Department of Biochemistry and Immunology, School of Medicine Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Andressa de Freitas
- Department of Pharmacology, School of Medicine Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Fernanda S. Soares
- Department of Pharmacology, Biological Sciences Center, Federal University of Santa Catarina, Florianópolis, Santa Catarina, Brazil
| | - Silvio M. Vieira
- Department of Pharmacology, School of Medicine Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Francisco J.A. Paula
- Department of Clinical Medicine, School of Medicine Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - José C. Alves-Filho
- Department of Pharmacology, School of Medicine Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Fernando Q. Cunha
- Department of Pharmacology, School of Medicine Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
- Corresponding author: Fernando Q. Cunha,
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Spiller F, Costa C, Souto FO, Vinchi F, Mestriner FLAC, Laure HJ, Alves-Filho JC, Freitas A, Rosa JC, Ferreira SH, Altruda F, Hirsch E, Greene LJ, Tolosano E, Cunha FQ. Inhibition of neutrophil migration by hemopexin leads to increased mortality due to sepsis in mice. Am J Respir Crit Care Med 2010; 183:922-31. [PMID: 20971829 DOI: 10.1164/rccm.201002-0223oc] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
RATIONALE The reduction of neutrophil migration to the bacterial focus is associated with poor outcome in sepsis. OBJECTIVES The objective of this study was to identify soluble substances in the blood of septic mice that inhibit neutrophil migration. METHODS A pool of serum obtained from mice 2 hours after the induction of severe sepsis by cecal ligation and puncture inhibited the neutrophil migration. The proteins with inhibitory activity on neutrophil migration were isolated by Blue-Sepharose chromatography, high-performance liquid chromatography, and electrophoresis, and identified by mass spectrometry. MEASUREMENTS AND MAIN RESULTS Hemopexin was identified as the serum component responsible for the inhibition of neutrophil migration. In sepsis, the pretreatment of wild-type mice with hemopexin inhibited neutrophil migration to the focus of infection and decreased the survival rate from 87.5 to 50.0%. Hemopexin-null mice subjected to severe sepsis presented normal neutrophil migration, low bacteremia, and an improvement of 40% in survival rate. Moreover, hemopexin inhibited the neutrophil chemotaxis response evoked by C5a or macrophage inflammatory protein-2 and induced a reduction of CXCR2 and L-selectin as well as the up-regulation of CD11b expression in neutrophil membranes. The inhibitory effect of hemopexin on neutrophil chemotaxis was prevented by serine protease inhibitors or ATP. In addition, serum levels of ATP were decreased 2 hours after severe sepsis. CONCLUSIONS These data demonstrate for the first time the inhibitory role of hemopexin in neutrophil migration during sepsis and suggest that the therapeutic inhibition of hemopexin or its protease activity could improve neutrophil migration to the focus of infection and survival in sepsis.
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Affiliation(s)
- Fernando Spiller
- Department of Pharmacology, University of São Paulo, Av. Bandeirantes, Ribeirão Preto, SP, Brazil
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Verri WA, Souto FO, Vieira SM, Almeida SCL, Fukada SY, Xu D, Alves-Filho JC, Cunha TM, Guerrero ATG, Mattos-Guimaraes RB, Oliveira FR, Teixeira MM, Silva JS, McInnes IB, Ferreira SH, Louzada-Junior P, Liew FY, Cunha FQ. IL-33 induces neutrophil migration in rheumatoid arthritis and is a target of anti-TNF therapy. Ann Rheum Dis 2010; 69:1697-703. [PMID: 20472598 DOI: 10.1136/ard.2009.122655] [Citation(s) in RCA: 204] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
OBJECTIVES Interleukin 33 (IL-33) is a new member of the IL-1 family of cytokines which signals via its receptor, ST2 (IL-33R), and has an important role in Th2 and mast cell responses. This study shows that IL-33 orchestrates neutrophil migration in arthritis. METHODS AND RESULTS Methylated bovine serum albumin (mBSA) challenge in the knee joint of mBSA-immunised mice induced local neutrophil migration accompanied by increased IL-33R and IL-33 mRNA expression. Cell migration was inhibited by systemic and local treatments with soluble (s)IL-33R, an IL-33 decoy receptor, and was not evident in IL-33R-deficient mice. IL-33 injection also induced IL-33R-dependent neutrophil migration. Antigen- and IL-33-induced neutrophil migration in the joint was dependent on CXCL1, CCL3, tumour necrosis factor alpha (TNFalpha) and IL-1beta synthesis. Synovial tissue, macrophages and activated neutrophils expressed IL-33R. IL-33 induces neutrophil migration by activating macrophages to produce chemokines and cytokines and by directly acting on neutrophils. Importantly, neutrophils from patients with rheumatoid arthritis successfully treated with anti-TNFalpha antibody (infliximab) expressed significantly lower levels of IL-33R than patients treated with methotrexate alone. Only neutrophils from patients treated with methotrexate alone or from normal donors stimulated with TNFalpha responded to IL-33 in chemotaxis. CONCLUSIONS These results suggest that suppression of IL-33R expression in neutrophils, preventing IL-33-induced neutrophil migration, may be an important mechanism of anti-TNFalpha therapy of inflammation.
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Affiliation(s)
- Waldiceu A Verri
- Department of Pharmacology, School of Medicine of Ribeirao Preto, University of Sao Paulo, Sao Paulo, Brazil.
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Spiller F, Orrico MIL, Nascimento DC, Czaikoski PG, Souto FO, Alves-Filho JC, Freitas A, Carlos D, Montenegro MF, Neto AF, Ferreira SH, Rossi MA, Hothersall JS, Assreuy J, Cunha FQ. Hydrogen sulfide improves neutrophil migration and survival in sepsis via K+ATP channel activation. Am J Respir Crit Care Med 2010; 182:360-8. [PMID: 20339148 DOI: 10.1164/rccm.200907-1145oc] [Citation(s) in RCA: 82] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
RATIONALE Recovering the neutrophil migration to the infectious focus improves survival in severe sepsis. Recently, we demonstrated that the cystathionine gamma-lyase (CSE)/hydrogen sulfide (H(2)S) pathway increased neutrophil recruitment to inflammatory focus during sterile inflammation. OBJECTIVES To evaluate if H(2)S administration increases neutrophil migration to infectious focus and survival of mice. METHODS Sepsis was induced by cecal ligation and puncture (CLP). MEASUREMENTS AND MAIN RESULTS The pretreatments of mice with H(2)S donors (NaHS or Lawesson's reagent) improved leukocyte rolling/adhesion in the mesenteric microcirculation as well as neutrophil migration. Consequently, bacteremia levels were reduced, hypotension and lung lesions were prevented, and the survival rate increased from approximately 13% to approximately 80%. Even when treatment was delayed (6 h after CLP), a highly significant reduction in mortality compared with untreated mice was observed. Moreover, H(2)S pretreatment prevented the down-regulation of CXCR2 and l-selectin and the up-regulation of CD11b and G protein-coupled receptor kinase 2 in neutrophils during sepsis. H(2)S also prevented the reduction of intercellular adhesion molecule-1 expression in the endothelium of the mesenteric microcirculation in severe sepsis. Confirming the critical role of H(2)S on sepsis outcome, pretreatment with dl-propargylglycine (a CSE inhibitor) inhibited neutrophil migration to the infectious focus, enhanced lung lesions, and induced high mortality in mice subjected to nonsevere sepsis (from 0 to approximately 80%). The beneficial effects of H(2)S were blocked by glibenclamide (a ATP-dependent K(+) channel blocker). CONCLUSIONS These results showed that H(2)S restores neutrophil migration to the infectious focus and improves survival outcome in severe sepsis by an ATP-dependent K(+) channel-dependent mechanism.
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Affiliation(s)
- Fernando Spiller
- Department of Pharmacology, University of Sao Paulo, Avenida Bandeirantes, Ribeirao Preto, Sao Paulo, Brazil
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Souto FO, Alves-Filho JC, Turato WM, Nascimento DC, Auxiliadora-Martins M, Basile-Filho A, de Queiroz Cunha F. CCR2 drives neutrophil infiltration and elicits tissue damage in remote organs during sepsis. Crit Care 2010. [PMCID: PMC3254941 DOI: 10.1186/cc9126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Trevelin SC, Alves-Filho JC, Sônego F, Turato W, Nascimento D, Souto FO, Cunha TM, Gazzinelli R, de Queiroz Cunha F. Regulation of neutrophil chemotaxis by toll-like receptor 9 is important for sepsis survival. Crit Care 2010. [PMCID: PMC3254971 DOI: 10.1186/cc9156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Souto FO, Alves-Filho JC, Freitas A, Spiller F, Martins MA, Basile-Filho A, Cunha FQ. CCR2 expression on neutrophils leads to detrimental tissue infiltration during sepsis. Crit Care 2009. [PMCID: PMC4085409 DOI: 10.1186/cc7811] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Dal-Secco D, Cunha TM, Freitas A, Alves-Filho JC, Souto FO, Fukada SY, Grespan R, Alencar NMN, Neto AF, Rossi MA, Ferreira SH, Hothersall JS, Cunha FQ. Hydrogen Sulfide Augments Neutrophil Migration through Enhancement of Adhesion Molecule Expression and Prevention of CXCR2 Internalization: Role of ATP-Sensitive Potassium Channels. J Immunol 2008; 181:4287-98. [DOI: 10.4049/jimmunol.181.6.4287] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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Napimoga MH, Vieira SM, Dal-Secco D, Freitas A, Souto FO, Mestriner FL, Alves-Filho JC, Grespan R, Kawai T, Ferreira SH, Cunha FQ. Peroxisome proliferator-activated receptor-gamma ligand, 15-deoxy-Delta12,14-prostaglandin J2, reduces neutrophil migration via a nitric oxide pathway. J Immunol 2008; 180:609-17. [PMID: 18097063 DOI: 10.4049/jimmunol.180.1.609] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Ligands for peroxisome proliferator-activated receptor gamma (PPAR-gamma), such as 15-deoxy-Delta12,14-prostaglandin J2 (15d-PGJ2) have been implicated as a new class of anti-inflammatory compounds with possible clinical applications. Based on this concept, this investigation was designed to determine the effect of 15d-PGJ2-mediated activation of PPAR-gamma ligand on neutrophil migration after an inflammatory stimulus and clarify the underlying molecular mechanisms using a mouse model of peritonitis. Our results demonstrated that 15d-PGJ2 administration decreases leukocyte rolling and adhesion to the inflamed mesenteric tissues by a mechanism dependent on NO. Specifically, pharmacological inhibitors of NO synthase remarkably abrogated the 15d-PGJ2-mediated suppression of neutrophil migration to the inflammatory site. Moreover, inducible NOS-/- mice were not susceptible to 15d-PGJ2-mediated suppression of neutrophil migration to the inflammatory sites when compared with their wild type. In addition, 15d-PGJ2-mediated suppression of neutrophil migration appeared to be independent of the production of cytokines and chemokines, since their production were not significantly affected in the carrageenan-injected peritoneal cavities. Finally, up-regulation of carrageenan-triggered ICAM-1 expression in the mesenteric microcirculation vessels was abrogated by pretreatment of wild-type mice with 15d-PGJ2, whereas 15d-PGJ2 inhibited F-actin rearrangement process in neutrophils. Taken together these findings demonstrated that 15d-PGJ2 suppresses inflammation-initiated neutrophil migration in a mechanism dependent on NO production in mesenteric tissues.
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Affiliation(s)
- Marcelo H Napimoga
- Laboratory of Molecular Biology, University of Uberaba, Minas Gerais, Brazil.
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Alves-Filho JC, Freitas A, Spiller F, Souto FO, Paula-Neto H, Silva JS, Cunha FQ. Toll-like receptor 2 induces chemokine receptor CXCR2 downregulation and neutrophil migration impairment in severe sepsis. Crit Care 2007. [PMCID: PMC3301130 DOI: 10.1186/cc5790] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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