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Delpech PO, Thuillier R, SaintYves T, Danion J, Le Pape S, van Amersfoort ES, Oortwijn B, Blancho G, Hauet T. Inhibition of complement improves graft outcome in a pig model of kidney autotransplantation. J Transl Med 2016; 14:277. [PMID: 27663514 PMCID: PMC5035455 DOI: 10.1186/s12967-016-1013-7] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2016] [Accepted: 08/16/2016] [Indexed: 01/26/2023] Open
Abstract
BACKGROUND Ischemia reperfusion injury (IRI) induced immune response is a critical issue in transplantation. Complement and contact system activation are among its key mechanisms. STUDY DESIGN We investigated the benefits of pre-reperfusion treatment with recombinant human C1INH (rhC1INH), inhibitor of both complement and contact activation, in a pig model of kidney autotransplantation, subjecting the organ to 60 min warm ischemia prior to 24 h static preservation to maximize damage. RESULTS Serum creatinine measurement showed that treated animals recovered glomerular function quicker than the Vehicle group. However, no difference was observed in tubular function recovery, and elevated level of urinary NGal (Neutrophil gelatinase-associated lipocalin) and plasma AST (Aspartate Aminotransferase) were detected, indicating that treatment did not influence IRI-mediated tubular cell necrosis. Regarding chronic graft outcome, rhC1INH significantly prevented fibrosis development and improved function. Immunohistochemistry and western blot showed decreased invasion by macrophages and T lymphocytes, and reduction of epithelial to mesenchymal transition. We determined the effect of treatment on complement activation with immunofluorescence analyses at 30 min post reperfusion, showing an inhibition of C4d deposition and MBL staining in treated animals. CONCLUSIONS In this model, the inhibition of complement activation by rhC1INH at reperfusion, while not completely counteracting IRI, limited immune system activation, significantly improving graft outcome on the short and long term.
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Affiliation(s)
- Pierre-Olivier Delpech
- Département d'Urologie, CHU de Poitiers, 86000, Poitiers, France.,Inserm U1082, 86000, Poitiers, France
| | - Raphael Thuillier
- Inserm U1082, 86000, Poitiers, France.,Service de Biochimie, CHU Poitiers, 86000, Poitiers, France.,Faculté de Médecine et de Pharmacie, Université de Poitiers, 86000, Poitiers, France.,Fédération Hospitalo-Universitaire SUPORT, 86000, Poitiers, France
| | | | - Jerome Danion
- Service de Chirurgie Viscérale, CHU de Poitiers, 86000, Poitiers, France
| | - Sylvain Le Pape
- Inserm U1082, 86000, Poitiers, France.,Faculté de Médecine et de Pharmacie, Université de Poitiers, 86000, Poitiers, France
| | | | | | - Gilles Blancho
- Institut de Transplantation Urologie et Néphrologie (ITUN), CHU de Nantes, Faculté de Médecine et des Techniques Médicales de Nantes, Université de Nantes, Inserm U1064, 44000, Nantes, France
| | - Thierry Hauet
- Inserm U1082, 86000, Poitiers, France. .,Service de Biochimie, CHU Poitiers, 86000, Poitiers, France. .,Faculté de Médecine et de Pharmacie, Université de Poitiers, 86000, Poitiers, France. .,Fédération Hospitalo-Universitaire SUPORT, 86000, Poitiers, France. .,Institut National de La Recherche Agronomique, Unité Expérimentale Génétique, Expérimentations et Systèmes Innovants, Domaine Expérimental Du Magneraud, Plateforme IBiSA 'MOPICT', 17700, Surgères, France. .,INSERM U1082, CHU de Poitiers, 2 Rue de La Miletrie, 86021, Poitiers Cedex, France.
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Hummelshoj T, Fog LM, Madsen HO, Sim RB, Garred P. Comparative study of the human ficolins reveals unique features of Ficolin-3 (Hakata antigen). Mol Immunol 2008; 45:1623-32. [PMID: 18006063 DOI: 10.1016/j.molimm.2007.10.006] [Citation(s) in RCA: 96] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2007] [Accepted: 10/04/2007] [Indexed: 11/22/2022]
Abstract
The ficolins and mannose-binding lectin (MBL) are collagen-like defence proteins that serve as recognition molecules in lectin complement pathway. Differential features that may indicate diverse functions of these proteins are poorly understood. In this study we compared important biological features of the ficolins and MBL. We investigated the tissue distribution of the FCN1-3 and the MBL2 genes encoding the ficolins and MBL by quantitative PCR. Recombinant proteins were produced and structural and biological characteristics were investigated and compared. Our main findings were that FCN3 mRNA was highly expressed in the liver and lung compared with the other genes revealing the lung as the tissue with the highest FCN3 expression pattern. Ficolin-3 revealed higher complement activating capacity compared with Ficolin-2, MBL and Ficolin-1 and was highly resistant to bacterial collagenase treatment, which is different from the other ficolins and MBL. We discovered several unique properties of Ficolin-3 showing that FCN3 is the most highly expressed gene in liver and lung among the lectin complement pathway initiators. Moreover, Ficolin-3 has a high complement activating potential and is the only collagenase proteolytic resistant molecule among the lectin complement pathway initiators.
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Affiliation(s)
- Tina Hummelshoj
- Department of Clinical Immunology, Section 7631, Rigshospitalet, Copenhagen University, Blegdamsvej 9, DK-2100 Copenhagen, Denmark
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Cervera C, Lozano F, Saval N, Gimferrer I, Ibañez A, Suárez B, Linares L, Cofán F, Ricart MJ, Esforzado N, Marcos MA, Pumarola T, Oppenheimer F, Campistol JM, Moreno A. The influence of innate immunity gene receptors polymorphisms in renal transplant infections. Transplantation 2007; 83:1493-500. [PMID: 17565323 DOI: 10.1097/01.tp.0000264999.71318.2b] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
BACKGROUND Genetically defined deficiencies in key components of the innate immune system have been associated with a greater risk of infection. The aim of this study was to assess the influence of genetic variability of innate immune receptors (mannose-binding lectin [MBL], mannose-associated serine-protease-2 [MASP-2], and Toll-like receptors [TLR4]) in the risk of infections after a kidney transplantation. METHODS All patients undergoing a kidney or kidney-pancreas transplantation during a 3-year period were included. Functionally relevant mutations in MBL2, MASP2, and TLR4 genes were determined by DNA sequencing. The incidence of major bacterial infections, asymptomatic cytomegalovirus (CMV) infection, and CMV disease were compared among groups. RESULTS There were no differences regarding major transplant characteristics among groups. Older age, requirements for posttransplant hemodialysis, and pretransplant diabetes, but not gene polymorphisms, were associated with a greater number of bacterial infections. In univariate analysis, low-MBL genotypes were associated with CMV disease in pretransplant CMV seropositive patients (P=0.015), whereas the TLR4 mutation was associated with higher risk of CMV primary infection (P=0.024). TLR4 mutation was an independent factor associated with CMV disease (odds ratio 5.84, 95% confidence interval 1.35-25.20, P=0.018). CONCLUSION Polymorphisms of innate immunity receptors, especially TLR4 mutation, were associated with higher risk of CMV disease, while susceptibility to other infectious disorders was not observed.
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Affiliation(s)
- Carlos Cervera
- Department of Infectious Diseases, Hospital Clínic, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Faculty of Medicine, University of Barcelona, Barcelona, Spain
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Sørensen CM, Hansen TK, Steffensen R, Jensenius JC, Thiel S. Hormonal regulation of mannan-binding lectin synthesis in hepatocytes. Clin Exp Immunol 2006; 145:173-82. [PMID: 16792688 PMCID: PMC1942004 DOI: 10.1111/j.1365-2249.2006.03101.x] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Activation of the complement system via the plasma protein mannan-binding lectin (MBL) provides a first line of defence against infections. The plasma level of MBL is, in part, determined genetically, but may also be influenced by different hormones in vivo. Here we study the hormonal regulation of MBL synthesis from the human hepatocyte cell line HuH-7. Cells were exposed to medium with growth hormone (GH), hydrocortisone, insulin-like growth factor (IGF)-1, insulin, interleukin (IL)-6 or thyroid hormones (T3 or T4). After 3 days the concentration of MBL in the culture supernatants was determined and the amount of mRNA for MBL was measured, relative to mRNA for beta2 microglobulin. GH, IL-6, T3 and T4 significantly increased MBL synthesis in a dose-dependent manner, while hydrocortisone, insulin and IGF-1 had no effect. T3 caused a fourfold increase at 1 nM of T3 (P < 0.001) and at 100 nM of T3 the production was increased more than eightfold. The effect of T4 was less potent, reaching an eightfold increase at 1 microM of T4 (P < 0.001). GH augmented the production of MBL threefold at a concentration of 100 ng/ml (P = 0.018) with no further effect up to 10 microg/ml, whereas IL-6 caused only a very weak increase in MBL production. MBL mRNA levels were stable during the first 24 h of T3 stimulation but increased significantly between 24 and 48 h. The results suggest that MBL synthesis in humans may be increased by thyroid hormone and GH, whereas it does not exhibit a classical IL-6-dependent response.
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Affiliation(s)
- C M Sørensen
- Department of Medical Microbiology and Immunology, University of Aarhus, Aarhus, Denmark
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