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In Situ Pre-Treatment of Vascularized Composite Allografts With a Targeted Complement Inhibitor Protects Against Brain Death and Ischemia Reperfusion Induced Injuries

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单位: [1]Guangxi Med Univ, Div Hepatobiliary Surg, Affiliated Hosp 1, Nanning, Peoples R China [2]Med Univ South Carolina, Dept Microbiol & Immunol, Charleston, SC 29425 USA [3]Huazhong Univ Sci & Technol,Inst Organ Transplantat,Tongji Hosp,Dept Surg,Wuhan,Peoples R China [4]Huazhong Univ Sci & Technol,Tongji Hosp,Dept Surg,Tongji Med Coll,Hepat & Vasc Surg Ctr,Wuhan,Peoples R China [5]Papworth Hosp NHS Trust, Dept Pathol, Cambridge, England [6]Univ Massachusetts, Transplant Div, Dept Surg, UMass Mem Med Ctr, Worcester, MA USA [7]Univ Florida, Div Pulm Med, Gainesville, FL 32611 USA [8]Med Univ South Carolina, Dept Surg, Lee Patterson Allen Transplant Immunobiol Lab, Microbiol & Immunol, Charleston, SC USA [9]Ralph H Johnson VA Med Ctr, Charleston, SC 29401 USA
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关键词: vascularized composite allotransplantation graft treatment transplantation complement inhibition brain death ischemia reperfusion injury preservation immunogenicity

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Introduction: Donor brain death (BD) is an unavoidable component of vascularized composite allograft (VCA) transplantation and a key contributor to ischemia-reperfusion injury (IRI). Complement is activated and deposited within solid organ grafts as a consequence of BD and has been shown to exacerbate IRI, although the role of BD and complement in VCA and the role it plays in IRI and VCA rejection has not been studied. Methods: BD was induced in Balb/c donors, and the VCA perfused prior to graft procurement with UW solution supplemented with or without CR2-Crry, a C3 convertase complement inhibitor that binds at sites of complement activation, such as that induced on the endothelium by induction of BD. Following perfusion, donor VCAs were cold stored for 6 hours before transplantation into C57BL/6 recipients. Donor VCAs from living donors (LD) were also procured and stored. Analyses included CR2-Crry graft binding, complement activation, toxicity, injury/inflammation, graft gene expression and survival. Results: Compared to LD VCAs, BD donor VCAs had exacerbated IRI and rejected earlier. Following pretransplant in-situ perfusion of the donor graft, CR2-Crry bound within the graft and was retained post-transplantation. CR2-Crry treatment significantly reduced complement deposition, inflammation and IRI as compared to vehicle-treated BD donors. Treatment of BD donor VCAs with CR2-Crry led to an injury profile not dissimilar to that seen in recipients of LD VCAs. Conclusion: Pre-coating a VCA with CR2-Crry in a clinically relevant treatment paradigm provides localized, and therefore minimally immunosuppressive, protection from the complement-mediated effects of BD induced exacerbated IRI.

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出版当年[2020]版:
大类 | 2 区 医学
小类 | 2 区 免疫学
最新[2025]版:
大类 | 2 区 医学
小类 | 2 区 免疫学
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出版当年[2019]版:
Q1 IMMUNOLOGY
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Q1 IMMUNOLOGY

影响因子: 最新[2023版] 最新五年平均 出版当年[2019版] 出版当年五年平均 出版前一年[2018版] 出版后一年[2020版]

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第一作者单位: [1]Guangxi Med Univ, Div Hepatobiliary Surg, Affiliated Hosp 1, Nanning, Peoples R China
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通讯机构: [2]Med Univ South Carolina, Dept Microbiol & Immunol, Charleston, SC 29425 USA [7]Univ Florida, Div Pulm Med, Gainesville, FL 32611 USA [8]Med Univ South Carolina, Dept Surg, Lee Patterson Allen Transplant Immunobiol Lab, Microbiol & Immunol, Charleston, SC USA [9]Ralph H Johnson VA Med Ctr, Charleston, SC 29401 USA
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