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- W2089882531 abstract "In Brief Background The pathogenesis of transplant vasculopathy (TV) is a multifactorial process. We hypothesized that ischemia-reperfusion injury and antibody-mediated damage contribute to the development of TV. Methods Human vessels were procured from nine separate donors undergoing cardiac surgery and stored in saline solution on ice until transplantation. BALB/c Rag2-/-IL-2Rγ-/- mice were transplanted with a human vessel graft on day 0. Purified anti–human leukocyte antigen class I antibody (W6/32), isotype control antibody, or saline was injected into recipient mice weekly until day 42, at which point the degree of intimal expansion (IE) of vessels was assessed by histologic analysis. Results We found that a prolonged cold ischemia time (6–12 hr) alone did not induce IE. In mice that received antibody where vessels were transplanted within 6 hr of procurement, no IE was observed. By contrast, in vessels exposed to more than 6 hr cold ischemia, both W6/32 antibody (30.4%±6.9%) and isotype control antibody (39.5%±6.0%) promoted significant IE (P<0.05 vs. saline [12.4%±1.7%]). Importantly, the isotype control antibody did not cross-react with human tissue. Interestingly, the number of mouse Fc-receptor–positive cells was significantly increased in human vessels exposed to more than 6 hr cold ischemia but only in the presence of antibody (P<0.05). Conclusions Antibody, regardless of its specificity, may promote IE in human vessels that are injured through cold ischemia via interaction with Fc-receptor–positive cells. This highlights the importance of controlling the degree of cold ischemia in clinical transplantation in an effort to reduce the risk of TV development. Supplemental digital content is available in the article." @default.
- W2089882531 created "2016-06-24" @default.
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- W2089882531 date "2013-07-27" @default.
- W2089882531 modified "2023-10-03" @default.
- W2089882531 title "Ischemia-Reperfusion Injury Accelerates Human Antibody-Mediated Transplant Vasculopathy" @default.
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- W2089882531 doi "https://doi.org/10.1097/tp.0b013e318295ee32" @default.
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