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Dimeloe S, Gubser P, Loeliger J, Frick C, Develioglu L, Fischer M, Marquardsen F, Bantug GR, Thommen D, Lecoultre Y, Zippelius A, Langenkamp A, Hess C. Tumor-derived TGF-β inhibits mitochondrial respiration to suppress IFN-γ production by human CD4 + T cells. Sci Signal 2019; 12:12/599/eaav3334. [PMID: 31530731 DOI: 10.1126/scisignal.aav3334] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Transforming growth factor-β (TGF-β) is produced by tumors, and increased amounts of this cytokine in the tumor microenvironment and serum are associated with poor patient survival. TGF-β-mediated suppression of antitumor T cell responses contributes to tumor growth and survival. However, TGF-β also has tumor-suppressive activity; thus, dissecting cell type-specific molecular effects may inform therapeutic strategies targeting this cytokine. Here, using human peripheral and tumor-associated lymphocytes, we investigated how tumor-derived TGF-β suppresses a key antitumor function of CD4+ T cells, interferon-γ (IFN-γ) production. Suppression required the expression and phosphorylation of Smad proteins in the TGF-β signaling pathway, but not their nuclear translocation, and depended on oxygen availability, suggesting a metabolic basis for these effects. Smad proteins were detected in the mitochondria of CD4+ T cells, where they were phosphorylated upon treatment with TGF-β. Phosphorylated Smad proteins were also detected in the mitochondria of isolated tumor-associated lymphocytes. TGF-β substantially impaired the ATP-coupled respiration of CD4+ T cells and specifically inhibited mitochondrial complex V (ATP synthase) activity. Last, inhibition of ATP synthase alone was sufficient to impair IFN-γ production by CD4+ T cells. These results, which have implications for human antitumor immunity, suggest that TGF-β targets T cell metabolism directly, thus diminishing T cell function through metabolic paralysis.
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Affiliation(s)
- Sarah Dimeloe
- Immunobiology Laboratory, Department of Biomedicine, University of Basel, 4031 Basel, Switzerland. .,Institute of Immunology and Immunotherapy and Institute of Metabolism and Systems Research, University of Birmingham, Birmingham B15 2TT, UK
| | - Patrick Gubser
- Immunobiology Laboratory, Department of Biomedicine, University of Basel, 4031 Basel, Switzerland
| | - Jordan Loeliger
- Immunobiology Laboratory, Department of Biomedicine, University of Basel, 4031 Basel, Switzerland
| | - Corina Frick
- Immunobiology Laboratory, Department of Biomedicine, University of Basel, 4031 Basel, Switzerland
| | - Leyla Develioglu
- Immunobiology Laboratory, Department of Biomedicine, University of Basel, 4031 Basel, Switzerland
| | - Marco Fischer
- Immunobiology Laboratory, Department of Biomedicine, University of Basel, 4031 Basel, Switzerland
| | - Florian Marquardsen
- Immunodeficiency Laboratory, Department of Biomedicine, University of Basel, 4031 Basel, Switzerland
| | - Glenn R Bantug
- Immunobiology Laboratory, Department of Biomedicine, University of Basel, 4031 Basel, Switzerland
| | - Daniela Thommen
- Cancer Immunology Laboratory, Department of Biomedicine, University of Basel, 4031 Basel, Switzerland
| | - Yannic Lecoultre
- Immunobiology Laboratory, Department of Biomedicine, University of Basel, 4031 Basel, Switzerland
| | - Alfred Zippelius
- Cancer Immunology Laboratory, Department of Biomedicine, University of Basel, 4031 Basel, Switzerland
| | | | - Christoph Hess
- Immunobiology Laboratory, Department of Biomedicine, University of Basel, 4031 Basel, Switzerland. .,Department of Medicine, University of Cambridge, Cambridge CB2 0AW, UK
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Fischer M, Bantug GR, Dimeloe S, Gubser PM, Burgener AV, Grählert J, Balmer ML, Develioglu L, Steiner R, Unterstab G, Sauder U, Hoenger G, Hess C. Early effector maturation of naïve human CD8 + T cells requires mitochondrial biogenesis. Eur J Immunol 2018; 48:1632-1643. [PMID: 30028501 DOI: 10.1002/eji.201747443] [Citation(s) in RCA: 18] [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: 12/05/2017] [Revised: 06/08/2018] [Accepted: 07/16/2018] [Indexed: 12/30/2022]
Abstract
The role of mitochondrial biogenesis during naïve to effector differentiation of CD8+ T cells remains ill explored. In this study, we describe a critical role for early mitochondrial biogenesis in supporting cytokine production of nascent activated human naïve CD8+ T cells. Specifically, we found that prior to the first round of cell division activated naïve CD8+ T cells rapidly increase mitochondrial mass, mitochondrial respiration, and mitochondrial reactive oxygen species (mROS) generation, which were all inter-linked and important for CD8+ T cell effector maturation. Inhibition of early mitochondrial biogenesis diminished mROS dependent IL-2 production - as well as subsequent IL-2 dependent TNF, IFN-γ, perforin, and granzyme B production. Together, these findings point to the importance of mitochondrial biogenesis during early effector maturation of CD8+ T cells.
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Affiliation(s)
- Marco Fischer
- Department of Biomedicine, Immunobiology, University Hospital and University of Basel, Basel, Switzerland
| | - Glenn R Bantug
- Department of Biomedicine, Immunobiology, University Hospital and University of Basel, Basel, Switzerland
| | - Sarah Dimeloe
- Department of Biomedicine, Immunobiology, University Hospital and University of Basel, Basel, Switzerland
| | - Patrick M Gubser
- Department of Biomedicine, Immunobiology, University Hospital and University of Basel, Basel, Switzerland
| | - Anne-Valérie Burgener
- Department of Biomedicine, Immunobiology, University Hospital and University of Basel, Basel, Switzerland
| | - Jasmin Grählert
- Department of Biomedicine, Immunobiology, University Hospital and University of Basel, Basel, Switzerland
| | - Maria L Balmer
- Department of Biomedicine, Immunobiology, University Hospital and University of Basel, Basel, Switzerland
| | - Leyla Develioglu
- Department of Biomedicine, Immunobiology, University Hospital and University of Basel, Basel, Switzerland
| | - Rebekah Steiner
- Department of Biomedicine, Immunobiology, University Hospital and University of Basel, Basel, Switzerland
| | - Gunhild Unterstab
- Department of Biomedicine, Immunobiology, University Hospital and University of Basel, Basel, Switzerland
| | - Ursula Sauder
- Microscopy Center, Biocenter, University of Basel, Basel, Switzerland
| | - Gideon Hoenger
- Department of Biomedicine, Immunobiology, University Hospital and University of Basel, Basel, Switzerland
| | - Christoph Hess
- Department of Biomedicine, Immunobiology, University Hospital and University of Basel, Basel, Switzerland
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Dimeloe S, Mehling M, Frick C, Loeliger J, Bantug GR, Sauder U, Fischer M, Belle R, Develioglu L, Tay S, Langenkamp A, Hess C. The Immune-Metabolic Basis of Effector Memory CD4+ T Cell Function under Hypoxic Conditions. J I 2015; 196:106-14. [DOI: 10.4049/jimmunol.1501766] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2015] [Accepted: 10/26/2015] [Indexed: 01/19/2023]
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Kolev M, Dimeloe S, Le Friec G, Navarini A, Arbore G, Povoleri GA, Fischer M, Belle R, Loeliger J, Develioglu L, Bantug GR, Watson J, Couzi L, Afzali B, Lavender P, Hess C, Kemper C. Complement Regulates Nutrient Influx and Metabolic Reprogramming during Th1 Cell Responses. Immunity 2015; 42:1033-47. [PMID: 26084023 PMCID: PMC4518498 DOI: 10.1016/j.immuni.2015.05.024] [Citation(s) in RCA: 155] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2014] [Revised: 03/24/2015] [Accepted: 04/10/2015] [Indexed: 01/02/2023]
Abstract
Expansion and acquisition of Th1 cell effector function requires metabolic reprogramming; however, the signals instructing these adaptations remain poorly defined. Here we found that in activated human T cells, autocrine stimulation of the complement receptor CD46, and specifically its intracellular domain CYT-1, was required for induction of the amino acid (AA) transporter LAT1 and enhanced expression of the glucose transporter GLUT1. Furthermore, CD46 activation simultaneously drove expression of LAMTOR5, which mediated assembly of the AA-sensing Ragulator-Rag-mTORC1 complex and increased glycolysis and oxidative phosphorylation (OXPHOS), required for cytokine production. T cells from CD46-deficient patients, characterized by defective Th1 cell induction, failed to upregulate the molecular components of this metabolic program as well as glycolysis and OXPHOS, but IFN-γ production could be reinstated by retrovirus-mediated CD46-CYT-1 expression. These data establish a critical link between the complement system and immunometabolic adaptations driving human CD4+ T cell effector function. CD46 regulates GLUT1 and LAT1 and enhances glucose and AA uptake in T cells LAMTOR5 mediates Ragulator-Rag-mTORC1 assembly in activated T cells Complement drives glycolysis and oxidative phosphorylation critical to Th1 cell induction
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Affiliation(s)
- Martin Kolev
- Division of Transplant Immunology and Mucosal Biology, MRC Centre for Transplantation, King's College London, Guy's Hospital, Great Maze Pond, London SE1 9RT, UK
| | - Sarah Dimeloe
- Department of Biomedicine, Immunobiology, University of Basel, 20 Hebelstrasse, 4031 Basel, Switzerland
| | - Gaelle Le Friec
- Division of Transplant Immunology and Mucosal Biology, MRC Centre for Transplantation, King's College London, Guy's Hospital, Great Maze Pond, London SE1 9RT, UK
| | - Alexander Navarini
- Department of Dermatology, University Hospital Zurich, 31 Gloriastrasse, 8091 Zürich, Switzerland
| | - Giuseppina Arbore
- Division of Transplant Immunology and Mucosal Biology, MRC Centre for Transplantation, King's College London, Guy's Hospital, Great Maze Pond, London SE1 9RT, UK
| | - Giovanni A Povoleri
- Division of Transplant Immunology and Mucosal Biology, MRC Centre for Transplantation, King's College London, Guy's Hospital, Great Maze Pond, London SE1 9RT, UK; Biomedical Research Centre, King's Health Partners, Guy's Hospital, Great Maze Pond, London SE1 9RT, UK
| | - Marco Fischer
- Department of Biomedicine, Immunobiology, University of Basel, 20 Hebelstrasse, 4031 Basel, Switzerland
| | - Réka Belle
- Department of Biomedicine, Immunobiology, University of Basel, 20 Hebelstrasse, 4031 Basel, Switzerland
| | - Jordan Loeliger
- Department of Biomedicine, Immunobiology, University of Basel, 20 Hebelstrasse, 4031 Basel, Switzerland
| | - Leyla Develioglu
- Department of Biomedicine, Immunobiology, University of Basel, 20 Hebelstrasse, 4031 Basel, Switzerland
| | - Glenn R Bantug
- Department of Biomedicine, Immunobiology, University of Basel, 20 Hebelstrasse, 4031 Basel, Switzerland
| | - Julie Watson
- MRC and Asthma UK Centre in Allergic Mechanisms of Asthma, King's College London, Guy's Hospital, Great Maze Pond, London SE1 9RT, UK
| | - Lionel Couzi
- Nephrology Transplantation, CHU Bordeaux, Hospital Pellegrin, CNRS UMR 1564, 146 rue Leo Saignat, 33076 Bordeaux, France
| | - Behdad Afzali
- Division of Transplant Immunology and Mucosal Biology, MRC Centre for Transplantation, King's College London, Guy's Hospital, Great Maze Pond, London SE1 9RT, UK; Biomedical Research Centre, King's Health Partners, Guy's Hospital, Great Maze Pond, London SE1 9RT, UK; Molecular Immunology and Inflammation Branch, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, 10 Center Drive, Bethesda, MD 20892, USA
| | - Paul Lavender
- MRC and Asthma UK Centre in Allergic Mechanisms of Asthma, King's College London, Guy's Hospital, Great Maze Pond, London SE1 9RT, UK
| | - Christoph Hess
- Department of Biomedicine, Immunobiology, University of Basel, 20 Hebelstrasse, 4031 Basel, Switzerland.
| | - Claudia Kemper
- Division of Transplant Immunology and Mucosal Biology, MRC Centre for Transplantation, King's College London, Guy's Hospital, Great Maze Pond, London SE1 9RT, UK.
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Kamga I, Kahi S, Develioglu L, Lichtner M, Marañón C, Deveau C, Meyer L, Goujard C, Lebon P, Sinet M, Hosmalin A. Type I Interferon Production Is Profoundly and Transiently Impaired in Primary HIV‐1 Infection. J Infect Dis 2005; 192:303-10. [PMID: 15962225 DOI: 10.1086/430931] [Citation(s) in RCA: 105] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2004] [Accepted: 02/10/2005] [Indexed: 11/04/2022] Open
Abstract
BACKGROUND Successful immunological control of human immunodeficiency virus (HIV) infection is achieved only in rare individuals. Plasmacytoid dendritic cells (DCs) are mostly responsible for the production of strong antiviral factors--that is, type I interferons (IFNs)--in response to viruses. Their natural IFN production is impaired in chronic HIV infection, in correlation with viral load and disease progression, but it has not been tested during the critical stage of primary infection, when a balance is set between host immune responses and viral replication. METHODS We longitudinally studied 26 patients during the primary stage of HIV infection. Fifteen patients received highly active antiretroviral therapy (HAART) for 12 months. RESULTS At the time of inclusion into the cohort, median type I IFN production in response to herpes simplex virus type 1 stimulation was dramatically impaired in peripheral blood mononuclear cells (PBMCs) from HIV-infected patients, compared with that in PBMCs from 31 uninfected donors (180 vs. 800 IU/mL; P<.0001). Median circulating plasmacytoid DC counts were also significantly decreased (7300 vs. 13,500 cells/mL; P=.001). Twelve months later, IFN production returned to normal, and the data suggest that HAART may help in the recovery of IFN production by plasmacytoid DCs. CONCLUSIONS These data underline the potential for early antiretroviral treatment and IFN- alpha treatment to enhance viral control in a larger proportion of patients during the critical stage of primary infection.
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Affiliation(s)
- Isabelle Kamga
- Institut Cochin, Département d'Immunologie, INSERM U567, Centre National de la Recherche Scientifique, UMR 8104, IFR 116, Université Paris V René Descartes, France
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Pacanowski J, Develioglu L, Kamga I, Sinet M, Desvarieux M, Girard PM, Hosmalin A. Early Plasmacytoid Dendritic Cell Changes Predict Plasma HIV Load Rebound during Primary Infection. J Infect Dis 2004; 190:1889-92. [PMID: 15499547 DOI: 10.1086/425020] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2004] [Accepted: 05/24/2004] [Indexed: 11/04/2022] Open
Abstract
During human immunodeficiency virus (HIV) infection, interruption of highly active antiretroviral therapy (HAART) is usually followed by virus load rebound. Previous data have suggested a role for plasmacytoid dendritic cells (pDCs) in anti-HIV innate immunity. Here, the number of pDCs was measured by flow cytometry before, during, and after receipt of HAART in 7 patients with documented primary HIV-1 infection. A negative correlation was evidenced between pDC counts after 1 month of HAART and mean plasma virus load after interruption of HAART (r2=0.85; Spearman's partial rho =-0.92; P=.03). pDC counts during treatment might help predict immune replication control after interruption of HAART.
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Affiliation(s)
- Jerome Pacanowski
- Département de Maladies Infectieuses et Tropicales, Hôpital St. Antoine, Assistance Publique--Hopitaux de Paris, Universite Paris VI, Paris, France
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Lucas B, Bumann D, Walduck A, Koesling J, Develioglu L, Meyer TF, Aebischer T. Adoptive transfer of CD4+ T cells specific for subunit A of Helicobacter pylori urease reduces H. pylori stomach colonization in mice in the absence of interleukin-4 (IL-4)/IL-13 receptor signaling. Infect Immun 2001; 69:1714-21. [PMID: 11179348 PMCID: PMC98077 DOI: 10.1128/iai.69.3.1714-1721.2001] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Protection in the murine model of Helicobacter pylori infection may be mediated by CD4+ T cells, but the mechanism remains unclear. To better understand how protection occurs in this model, we generated and characterized H. pylori urease-specific CD4+ T cells from BALB/c mice immunized with Salmonella enterica serovar Typhimurium expressing H. pylori urease (subunits A and B). The CD4+ T cells were found to be specific for subunit A (UreA). Upon antigen-specific stimulation, expression of interleukin 4 (IL-4), IL-10, gamma interferon (IFN-gamma), and tumor necrosis factor alpha was induced. Immunocytochemical analysis showed that the majority of cells produced IFN-gamma and IL-10. Adoptive transfer of the UreA-specific CD4+ T cells into naive syngeneic recipients led to a threefold reduction in the number of bacteria in the recipient group when compared to that in the nonrecipient group. Stomach colonization was also reduced significantly after transfer of these cells into patently infected mice. Adoptive transfer of UreA-specific CD4+ T cells into IL-4 receptor alpha chain-deficient BALB/c mice indicated that IL-4 and IL-13 were not critical in the control of bacterial load. In addition, synthetic peptides were used to identify three functional T-cell epitopes present in subunit A which were recognized by the UreA-specific T cells. Analysis of H. pylori-specific cellular immune responses in recipient challenged and nonrecipient infected mice indicated a strong local restriction of the response in infected animals. The implications of these findings for the mechanism of protection and the development of peptide-based vaccination are discussed.
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Affiliation(s)
- B Lucas
- Max-Planck-Institute for Infection Biology, Department of Molecular Biology, Schumannstrasse 21/22, 10117 Berlin, Germany
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Bagaté K, Develioglu L, Grima M, De Jong W, Simmons WH, Imbs JL, Barthelmebs M. Vascular catabolism of bradykinin in the isolated perfused rat kidney. Eur J Pharmacol 2000; 407:317-25. [PMID: 11068029 DOI: 10.1016/s0014-2999(00)00744-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Kinins in the circulation are rapidly metabolized by several different peptidases. The purpose of this study was to evaluate the contribution of membrane-bound peptidases to kinin metabolism in the renal circulation. Experiments were performed in vitro, in isolated rat kidneys perfused at a constant flow rate (8 ml/min) with Tyrode's solution. The effects of peptidase inhibitors were evaluated on the functional vasodilator response caused by bradykinin (30 nM) or [Tyr(Me)(8)]bradykinin (10 nM) via activation of bradykinin B2 receptors in kidneys precontracted with prostaglandin F2alpha. Angiotensin converting enzyme inhibitors, enalaprilat (3 microM), ramiprilat (1 microM) or lisinopril (1 microM), increased the bradykinin-induced renal vasodilation by 40% or more. Inhibitors of neutral endopeptidase (thiorphan or phosphoramidon, 10 microM), basic carboxypeptidase (DL-2-mercaptomethyl-3-guanidino-ethylthiopropanoic acid or MGTPA, 10 microM) and aminopeptidase P (apstatin, 20 microM) however did not enhance the renal vasodilator response elicited by kinins, whatever tested alone or in the presence of lisinopril. These findings indicate that angiotensin converting enzyme is the major peptidase whose inhibition potentiates the renal bradykinin B2 receptor mediated vasodilator response of kinins. The relative contribution in this potentiation of inhibition of kinin inactivation and of cross-talk of angiotensin converting enzyme with bradykinin B2 receptor remains however to be clarified.
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Affiliation(s)
- K Bagaté
- Institut de Pharmacologie, Faculté de Médecine, 11 Rue Humann, 67085 Cedex, Strasbourg, France
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Bagaté K, Develioglu L, Imbs JL, Michel B, Helwig JJ, Barthelmebs M. Vascular kinin B(1) and B(2) receptor-mediated effects in the rat isolated perfused kidney - differential regulations. Br J Pharmacol 1999; 128:1643-50. [PMID: 10588918 PMCID: PMC1571803 DOI: 10.1038/sj.bjp.0702961] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
1. Bradydykinin (BK) and analogs acting preferentially at kinin B(1) or B(2) receptors were tested on the rat isolated perfused kidney. Kidneys were perfused in an open circuit with Tyrode's solution. Kidneys preconstricted with prostaglandin F(2alpha) were used for the analysis of vasodilator responses. 2. BK induced a concentration-dependent renal relaxation (pD(2)=8.9+/-0.4); this vasodilator response was reproduced by a selective B(2) receptor agonist, Tyr(Me)(8)-BK (pD(2)=9.0+/-0.1) with a higher maximum effect (E(max)=78.9+/-6.6 and 55.8+/-4.3% of ACh-induced relaxation respectively, n=6 and 19, P<0.02). Icatibant (10 nM), a selective B(2) receptor antagonist, abolished BK-elicited relaxation. Tachyphylaxis of kinin B(2) receptors appeared when repeatedly stimulated at 10 min intervals. 3. Des-Arg(9)-BK, a selective B(1) receptor agonist, induced concentration-dependent vasoconstriction at micromolar concentration. Maximum response was enhanced in the presence of lisinopril (1 microM) and inhibited by R 715 (8 microM), a selective B(1) receptor antagonist. Des-Arg(9)-[Leu(8)]-BK behaved as an agonist. 4. A contractile response to des-Arg(9)-BK occurred after 1 of perfusion and increased with time by a factor of about three over a 3 h perfusion. This post-isolation sensitization to des-Arg(9)-BK was abolished by dexamethasone (DEX, 30 mg kg(-1) i.p., 3 h before the start of the experiment and 10 microM in perfusate) and actinomycin D (2 microM). Acute exposure to DEX (10 microM) had no effect on sensitized des-Arg(9)-BK response, in contrast to indomethacin (30 microM) that abolished it. DEX pretreatment however had no effect on BK-induced renal vasodilation. 5. Present results indicate that the main renal vascular response to BK consists of relaxation linked to the activation of kinin B(2) receptors which rapidly desensitize. Renal B(1) receptors are also present and are time-dependently sensitized during the in vitro perfusion of the rat kidneys.
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Affiliation(s)
- Karim Bagaté
- Institut de Pharmacologie, 11 rue Humann, 67085 Strasbourg, Cedex, France
- Laboratoire de Pharmacologie et de Physiologie Rénovasculaire (CJF INSERM 94-09), Faculté de Médecine, Université Louis Pasteur, Strasbourg, France
| | - Leyla Develioglu
- Institut de Pharmacologie, 11 rue Humann, 67085 Strasbourg, Cedex, France
| | - Jean-Louis Imbs
- Institut de Pharmacologie, 11 rue Humann, 67085 Strasbourg, Cedex, France
- Service d'Hypertension artérielle, Maladies vasculaires et Pharmacologie clinique, Hôpitaux Universitaires de Strasbourg, France
| | - Bruno Michel
- Institut de Pharmacologie, 11 rue Humann, 67085 Strasbourg, Cedex, France
| | - Jean-Jacques Helwig
- Laboratoire de Pharmacologie et de Physiologie Rénovasculaire (CJF INSERM 94-09), Faculté de Médecine, Université Louis Pasteur, Strasbourg, France
| | - Mariette Barthelmebs
- Institut de Pharmacologie, 11 rue Humann, 67085 Strasbourg, Cedex, France
- Laboratoire de Pharmacologie et de Physiologie Rénovasculaire (CJF INSERM 94-09), Faculté de Médecine, Université Louis Pasteur, Strasbourg, France
- Author for correspondence:
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Bagate K, Develioglu L, Michel B, Grima M, Imbs JL, Barthelmebs M. [Renal vascular responses of bradykinin in the isolated rat kidney]. Arch Mal Coeur Vaiss 1997; 90:1131-1134. [PMID: 9404422] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Kinins, by an autocrine or paracrine hormonal action, are potent modulators of regional vasomotricity. Their effects on the renal circulation are not well defined. The aim of this study was to analyse the renal vascular response induced by bradykinin, to precise the type(s) of receptor involved and to evaluate the contribution of various peptidases in the local catabolism of the kinin. Experiments were performed on the isolated rat kidney, perfused in an open circuit, at a constant flow of 8 mL/min, with a Tyrode's solution. Vasodilator responses were evaluated after renal vascular tone had been restored by a continuous perfusion with prostaglandin F2 alpha. Infusion of bradykinin (0.1-30 nM) induced a concentration-dependent renal vasorelaxation. A maximal response of 39.5 +/- 2.8% (n = 32) reversion of the tone induced by prostaglandin F2 alpha (about 50% of the maximal response induced by acetylcholine on the same kidneys) was obtained at 30 nM. Bradykinin-induced vasodilatation was completely inhibited by HOE 140 (10 nM), a selective bradykinin B2 receptor antagonist. At a supramaximal concentration of 300 nM, bradykinin-induced vasorelaxation was modulated by a concomitant vasoconstriction. A concentration-dependent vasoconstriction was also obtained with desArg9 bradykinin (1-8 microM), a selective agonist of the bradykinin B1 receptor. The inhibition of neutral endopeptidase by phosphoramidon (10 microM) or the inhibition of carboxypeptidase M by MGTPA (10 microM) did not modify the bradykinin-induced renal vasorelaxation. On the other hand, the inhibition of angiotensin I converting enzyme by lisinopril (1 microM) potentiated by about 32% the vasorelaxant response induced by 30 nM bradykinin (52.3 +/- 11.8% relaxation, n = 5, p < 0.05). Present results demonstrate that 1) bradykinin primarily evokes B2 receptor-linked renal vasodilatation, 2) bradykinin B1 receptors appear also to be present on the rat renal vasculature and 3) angiotensin 1 converting enzyme contributes to the local vascular catabolism of the kinin.
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Affiliation(s)
- K Bagate
- Institut de pharmacologie, faculté de médecine, université Louis-Pasteur, Strasbourg
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