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Puente M, Fariñas-Alvarez C, Moreto A, Sánchez-Velasco P, Ocejo-Vinyals JG, Fariñas MC. Low pre-transplant levels of mannose-binding lectin are associated with viral infections and mortality after haematopoietic allogeneic stem cell transplantation. BMC Immunol 2019; 20:40. [PMID: 31706269 PMCID: PMC6842494 DOI: 10.1186/s12865-019-0318-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2018] [Accepted: 09/20/2019] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Mannose-binding lectin (MBL) is a key component of innate immunity. Low serum MBL levels, related to promoter polymorphism and structural variants, have been associated with an increased risk of infection. The aim of this work was to analyse the incidence and severity of infections and mortality in relation to the MBL2 genotype and MBL levels in patients underwent allogeneic haematopoietic stem cell transplantation (Allo-HSCT). RESULTS This was a prospective cohort study of 72 consecutive patients underwent Allo-HSCT between January 2007 and June 2009 in a tertiary referral centre. Three periods were considered in the patients' follow-up: the early period (0-30 days after Allo-HSCT), the intermediate period (30-100 days after Allo-HSCT) and the late period (> 100 days after Allo-HSCT). A commercial line probe assay for MBL2 genotyping and an ELISA Kit were used to measure MBL levels. A total of 220 episodes of infection were collected in the 72 patients. No association between donor or recipient MBL2 genotype and infection was found. The first episode of infection presented earlier in patients with pre-transplant MBL levels of < 1000 ng/ml (median 6d vs 8d, p = 0.036). MBL levels < 1000 ng/ml in the pre-transplant period (risk ratio (RR) 2.48, 95% CI 1.00-6.13), neutropenic period (0-30 days, RR 3.28, 95% CI 1.53-7.06) and intermediate period (30-100 days, RR 2.37, 95% CI 1.15-4.90) were associated with increased risk of virus infection. No association with bacterial or fungal disease was found. Mortality was associated with pre-transplant MBL levels < 1000 ng/ml (hazard ratio 5.55, 95% CI 1.17-26.30, p = 0.03) but not with MBL2 genotype. CONCLUSIONS Patients who underwent Allo-HSCT with low pre-transplant MBL levels presented the first episode of infection earlier and had an increased risk of viral infections and mortality in the first 6 months post-transplant. Thus, pre-transplant MBL levels would be important in predicting susceptibility to viral infections and mortality and might be considered a biomarker to be included in the pre-transplantation risk assessment.
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Affiliation(s)
- M Puente
- Service of Hematology, Hospital Universitario Marqués de Valdecilla, Santander, Spain.,Present address: Service of Hematology, Hospital de Cruces, Bilbao, Spain
| | - C Fariñas-Alvarez
- Division of Health Care Quality, Hospital Universitario Marqués de Valdecilla, Santander, Spain
| | - A Moreto
- Service of Hematology, Hospital Universitario Marqués de Valdecilla, Santander, Spain.,Present address: Service of Hematology, Hospital de Cruces, Bilbao, Spain
| | - P Sánchez-Velasco
- Division of Health Care Quality, Hospital Universitario Marqués de Valdecilla, Santander, Spain
| | - J G Ocejo-Vinyals
- Division of Health Care Quality, Hospital Universitario Marqués de Valdecilla, Santander, Spain
| | - M C Fariñas
- Infectious Diseases Unit, Hospital Universitario Marqués de Valdecilla, IDIVAL, University of Cantabria, Av. Valdecilla s/n, 39008, Santander, Spain.
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Czerewaty M, Tarnowski M, Safranow K, Domanski L, Pawlik A. Mannose binding lectin 2 gene polymorphisms in patients after renal transplantation with acute graft rejection. Transpl Immunol 2019; 54:29-37. [PMID: 30710628 DOI: 10.1016/j.trim.2019.01.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2018] [Revised: 01/27/2019] [Accepted: 01/28/2019] [Indexed: 02/08/2023]
Abstract
Mannose binding lectin 2 (MBL2) is one of the pattern-recognition soluble receptors and is responsible for complement activation via the lectin pathway, so it plays an important role in kidney transplantation. The aim of the study was to examine the association between MBL2 gene polymorphisms and acute rejection of the kidney allograft. This study enrolled 266 Caucasian deceased-donor renal transplant recipients - 69 with diagnosed acute graft rejection, 197 with stable graft function. A 969 bp DNA fragment, from chromosome 10, including promoter region and exon 1 of MBL2 gene was sequenced. The DNA fragment obtained contained 122 SNPs accordingly to the NCBI dbSNP database. Of this number only nine showed variation within our population (rs36014597, rs5030737, rs1800450, rs7095891, rs11003123, rs7096206, rs7084554, rs11003124, rs11003125), and only these were subjected to further analysis. Among the studied polymorphisms in the MBL2 gene only rs1800450 polymorphism was statistically significantly associated with kidney allograft rejection. The AA genotype was significantly associated with an increased risk of acute kidney allograft rejection. (AA vs GA+GG: OR=9.29 (95%CI: 1.83-47.17), p=0.005). The results of our study indicate that MBL2 gene rs1800450 polymorphism may be associated with the risk of acute kidney allograft rejection. The AA genotype, associated with lower MBL2 expression, may be associated with an increased risk of acute kidney allograft rejection.
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Affiliation(s)
- Michał Czerewaty
- Department of Physiology, Pomeranian Medical University, Szczecin, Poland
| | - Maciej Tarnowski
- Department of Physiology, Pomeranian Medical University, Szczecin, Poland
| | - Krzysztof Safranow
- Department of Biochemistry and Medical Chemistry, Pomeranian Medical University, Szczecin, Poland
| | - Leszek Domanski
- Clinical Department of Nephrology, Transplantology and Internal Medicine, Pomeranian Medical University, Szczecin, Poland
| | - Andrzej Pawlik
- Department of Physiology, Pomeranian Medical University, Szczecin, Poland.
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Kim BM, Lotter‐Stark HCT, Rybicki EP, Chikwamba RK, Palmer KE. Characterization of the hypersensitive response-like cell death phenomenon induced by targeting antiviral lectin griffithsin to the secretory pathway. PLANT BIOTECHNOLOGY JOURNAL 2018; 16:1811-1821. [PMID: 29509998 PMCID: PMC6131415 DOI: 10.1111/pbi.12917] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2017] [Revised: 02/24/2018] [Accepted: 02/28/2018] [Indexed: 05/23/2023]
Abstract
Griffithsin (GRFT) is an antiviral lectin, originally derived from a red alga, which is currently being investigated as a topical microbicide to prevent transmission of human immunodeficiency virus (HIV). Targeting GRFT to the apoplast for production in Nicotiana benthamiana resulted in necrotic symptoms associated with a hypersensitive response (HR)-like cell death, accompanied by H2 O2 generation and increased PR1 expression. Mannose-binding lectins surfactant protein D (SP-D), cyanovirin-N (CV-N) and human mannose-binding lectin (hMBL) also induce salicylic acid (SA)-dependent HR-like cell death in N. benthamiana, and this effect is mediated by the lectin's glycan binding activity. We found that secreted GRFT interacts with an endogenous glycoprotein, α-xylosidase (XYL1), which is involved in cell wall organization. The necrotic effect could be mitigated by overexpression of Arabidopsis XYL1, and by co-expression of SA-degrading enzyme NahG, providing strategies for enhancing expression of oligomannose-binding lectins in plants.
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Affiliation(s)
- Bo Min Kim
- Center for Predictive MedicineJames Graham Brown Cancer CenterDepartment of Pharmacology and ToxicologyUniversity of Louisville School of MedicineLouisvilleKYUSA
| | | | - Edward P. Rybicki
- Department of Molecular & Cell BiologyInstitute of Infectious Disease and Molecular MedicineUniversity of Cape TownCape TownSouth Africa
| | - Rachel K. Chikwamba
- BiosciencesCouncil for Scientific and Industrial Research (CSIR)PretoriaSouth Africa
| | - Kenneth E. Palmer
- Center for Predictive MedicineJames Graham Brown Cancer CenterDepartment of Pharmacology and ToxicologyUniversity of Louisville School of MedicineLouisvilleKYUSA
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Nauser CL, Farrar CA, Sacks SH. Complement Recognition Pathways in Renal Transplantation. J Am Soc Nephrol 2017; 28:2571-2578. [PMID: 28663231 DOI: 10.1681/asn.2017010079] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
The complement system, consisting of soluble and cell membrane-bound components of the innate immune system, has defined roles in the pathophysiology of renal allograft rejection. Notably, the unavoidable ischemia-reperfusion injury inherent to transplantation is mediated through the terminal complement activation products C5a and C5b-9. Furthermore, biologically active fragments C3a and C5a, produced during complement activation, can modulate both antigen presentation and T cell priming, ultimately leading to allograft rejection. Earlier work identified renal tubule cell synthesis of C3, rather than hepatic synthesis of C3, as the primary source of C3 driving these effects. Recent efforts have focused on identifying the local triggers of complement activation. Collectin-11, a soluble C-type lectin expressed in renal tissue, has been implicated as an important trigger of complement activation in renal tissue. In particular, collectin-11 has been shown to engage L-fucose at sites of ischemic stress, activating the lectin complement pathway and directing the innate immune response to the distressed renal tubule. The interface between collectin-11 and L-fucose, in both the recipient and the allograft, is an attractive target for therapies intended to curtail renal inflammation in the acute phase.
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Affiliation(s)
- Christopher L Nauser
- Medical Research Council Centre for Transplantation, Division of Transplantation Immunology and Mucosal Biology, King's College London, National Health Service Guy's and St. Thomas' Trust, London, United Kingdom
| | - Conrad A Farrar
- Medical Research Council Centre for Transplantation, Division of Transplantation Immunology and Mucosal Biology, King's College London, National Health Service Guy's and St. Thomas' Trust, London, United Kingdom
| | - Steven H Sacks
- Medical Research Council Centre for Transplantation, Division of Transplantation Immunology and Mucosal Biology, King's College London, National Health Service Guy's and St. Thomas' Trust, London, United Kingdom
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Farrar CA, Zhou W, Sacks SH. Role of the lectin complement pathway in kidney transplantation. Immunobiology 2016; 221:1068-72. [PMID: 27286717 DOI: 10.1016/j.imbio.2016.05.004] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2016] [Revised: 05/17/2016] [Accepted: 05/19/2016] [Indexed: 12/11/2022]
Abstract
In the last 15 years two major advances in the role of complement in the kidney transplant have come about. The first is that ischaemia reperfusion injury and its profound effect on transplant outcome is dependent on the terminal product of complement activation, C5b-9. The second key observation relates to the function of the small biologically active fragments C3a and C5a released by complement activation in increasing antigen presentation and priming the T cell response that results in transplant rejection. In both cases local synthesis of C3 principally by the renal tubule cells plays an essential role that overshadows the role of the circulating pool of C3 generated largely by hepatocyte synthesis. More recent efforts have investigated the molecules expressed by renal tissue that can trigger complement activation. These have revealed a prominent effect of collectin-11 (CL-11), a soluble C-type lectin that is expressed in renal tissue and aligns with its major ligand L-fucose at sites of complement activation following ischaemic stress. Biochemical studies have shown that interaction between CL-11 and L-fucose results in complement activation by the lectin complement pathway, precisely targeting the innate immune response to the ischaemic tubule surface. Therapeutic approaches to reduce inflammatory and immune stimulation in ischaemic kidney have so far targeted C3 or its activation products and several are in clinical trials. The finding that lectin-fucose interaction is an important trigger of lectin pathway complement activation within the donor organ opens up further therapeutic targets where intervention could protect the donor kidney against complement.
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Affiliation(s)
- Conrad A Farrar
- MRC Centre for Transplantation, Division of Transplantation Immunology & Mucosal Biology, King's College London School of Medicine at Guy's, King's College and St. Thomas's Hospitals, London, United Kingdom.
| | - Wuding Zhou
- MRC Centre for Transplantation, Division of Transplantation Immunology & Mucosal Biology, King's College London School of Medicine at Guy's, King's College and St. Thomas's Hospitals, London, United Kingdom
| | - Steven H Sacks
- MRC Centre for Transplantation, Division of Transplantation Immunology & Mucosal Biology, King's College London School of Medicine at Guy's, King's College and St. Thomas's Hospitals, London, United Kingdom
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Golshayan D, Wójtowicz A, Bibert S, Pyndiah N, Manuel O, Binet I, Buhler LH, Huynh-Do U, Mueller T, Steiger J, Pascual M, Meylan P, Bochud PY. Polymorphisms in the lectin pathway of complement activation influence the incidence of acute rejection and graft outcome after kidney transplantation. Kidney Int 2016; 89:927-38. [PMID: 26924055 DOI: 10.1016/j.kint.2015.11.025] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2015] [Revised: 09/26/2015] [Accepted: 11/12/2015] [Indexed: 01/01/2023]
Abstract
There are conflicting data on the role of the lectin pathway of complement activation and its recognition molecules in acute rejection and outcome after transplantation. To help resolve this we analyzed polymorphisms and serum levels of lectin pathway components in 710 consecutive kidney transplant recipients enrolled in the nationwide Swiss Transplant Cohort Study, together with all biopsy-proven rejection episodes and 1-year graft and patient survival. Functional mannose-binding lectin (MBL) levels were determined in serum samples, and previously described MBL2, ficolin 2, and MBL-associated serine protease 2 polymorphisms were genotyped. Low MBL serum levels and deficient MBL2 diplotypes were associated with a higher incidence of acute cellular rejection during the first year, in particular in recipients of deceased-donor kidneys. This association remained significant (hazard ratio 1.75, 95% confidence interval 1.18-2.60) in a Cox regression model after adjustment for relevant covariates. In contrast, there was no significant association with rates of antibody-mediated rejection, patient death, early graft dysfunction or loss. Thus, results in a prospective multicenter contemporary cohort suggest that MBL2 polymorphisms result in low MBL serum levels and are associated with acute cellular rejection after kidney transplantation. Since MBL deficiency is a relatively frequent trait in the normal population, our findings may lead to individual risk stratification and customized immunosuppression.
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Affiliation(s)
- Déla Golshayan
- Transplantation Center, Centre Hospitalier Universitaire Vaudois and University of Lausanne, Lausanne, Switzerland; Transplantation Immunopathology Laboratory, Centre Hospitalier Universitaire Vaudois and University of Lausanne, Lausanne, Switzerland.
| | - Agnieszka Wójtowicz
- Service of Infectious Diseases, Centre Hospitalier Universitaire Vaudois and University of Lausanne, Lausanne, Switzerland
| | - Stéphanie Bibert
- Service of Infectious Diseases, Centre Hospitalier Universitaire Vaudois and University of Lausanne, Lausanne, Switzerland
| | - Nitisha Pyndiah
- Service of Infectious Diseases, Centre Hospitalier Universitaire Vaudois and University of Lausanne, Lausanne, Switzerland
| | - Oriol Manuel
- Transplantation Center, Centre Hospitalier Universitaire Vaudois and University of Lausanne, Lausanne, Switzerland; Service of Infectious Diseases, Centre Hospitalier Universitaire Vaudois and University of Lausanne, Lausanne, Switzerland
| | - Isabelle Binet
- Nephrologie und Transplantationsmedizin, Kantonsspital St. Gallen, St. Gallen, Switzerland
| | - Leo H Buhler
- Centre Universitaire Romand de Transplantation, Hôpitaux Universitaires de Genève, Geneva, Switzerland
| | - Uyen Huynh-Do
- Department of Nephrology and Hypertension, Inselspital Bern, Bern, Switzerland
| | - Thomas Mueller
- Department of Nephrology, University Hospital Zurich, Zurich, Switzerland
| | - Jürg Steiger
- Transplantation Immunology and Nephrology, University Hospital Basel, Basel, Switzerland
| | - Manuel Pascual
- Transplantation Center, Centre Hospitalier Universitaire Vaudois and University of Lausanne, Lausanne, Switzerland; Transplantation Immunopathology Laboratory, Centre Hospitalier Universitaire Vaudois and University of Lausanne, Lausanne, Switzerland
| | - Pascal Meylan
- Transplantation Center, Centre Hospitalier Universitaire Vaudois and University of Lausanne, Lausanne, Switzerland; Service of Infectious Diseases, Centre Hospitalier Universitaire Vaudois and University of Lausanne, Lausanne, Switzerland
| | - Pierre-Yves Bochud
- Service of Infectious Diseases, Centre Hospitalier Universitaire Vaudois and University of Lausanne, Lausanne, Switzerland
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