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Transfection of NFκB-decoy oligodeoxynucleotides using efficient ultrasound-mediated gene transfer into donor kidneys prolonged survival of rat renal allografts

Abstract

Nuclear factor κB (NFκB) plays a pivotal role in the coordinated transactivation of a series of genes of cytokines and adhesion molecules that are highly involved in the onset of acute rejection in organ transplantation. We previously developed decoy cis-elements oligo deoxyribonucleic acid against NFκB (NFκB-decoy) that effectively inhibited the activation of major inflammatory mediators in vitro and in vivo. Accordingly, we hypothesized that transfection of NFκB-decoy into the donor kidney would prevent acute rejection and prolong graft survival, and thus provide effective therapy for renal acute rejection. To transfect NFκB-decoy, we employed a novel approach using ultrasound exposure with an echocardiographic contrast agent, Optison, and clearly demonstrated successful transfection of NFκB-decoy into renal tissue. The therapeutic effect of NFκB-decoy on renal allografts was then evaluated in a rat renal allograft model (Wistar–Lewis). In the control group, graft function significantly deteriorated with marked destruction of renal tissue, accompanied by increased production of major inflammatory mediators, and all animals died of renal failure by 9 days. In contrast, graft function (serum creatinine on day 2, NFκB-treated: 0.97±0.16 versus control: 1.84±0.23 mg/dl, P<0.01) and histological structure were well preserved with significantly decreased expression of NFκB-regulated cytokines and adhesion molecules, including IL-1, iNOS, MCP-1, TNF-α, and ICAM-1, in allografts transfected with NFκB-decoy. As a result, animal survival was significantly prolonged in this group as compared to controls (14.2±5.2 versus 7.1±1.2 days, P<0.01). Thus, we established a novel ultrasound–Optison-mediated gene transfection approach and demonstrated the significant prolongation of graft survival by the successful transfection of NFκB-decoy into the donor kidney in a rat renal allograft model.

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Azuma, H., Tomita, N., Kaneda, Y. et al. Transfection of NFκB-decoy oligodeoxynucleotides using efficient ultrasound-mediated gene transfer into donor kidneys prolonged survival of rat renal allografts. Gene Ther 10, 415–425 (2003). https://doi.org/10.1038/sj.gt.3301882

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