Objective: To evaluate the local expression of CTLA4Ig gene in small intestines and its effect on prolonging survival time of the small bowel allografts. Methods: The donor small bowels were perfused ex vivo with CT...Objective: To evaluate the local expression of CTLA4Ig gene in small intestines and its effect on prolonging survival time of the small bowel allografts. Methods: The donor small bowels were perfused ex vivo with CTLA4Ig cDNA reconstructed plasmid packaged with lipofectin vector via intra-superior mesenteric artery before transplantation. The CTLA4Ig transgene expression in the small bowel allografts was assessed by immunohistology and RT-PCR after transplantation. Results: Immunohistology and RT-PCR demonstrated expression of CTLA4Ig transgene in the allografts at least for 28 d after transplantation. Eleven cases of the 18 small bowel allografts that received CTLA4Ig gene transfection survived more than 90 d in the recipients. Conclusion: A single ex vivo intra-superior mesenteric artery infusion of CTLA4Ig cDNA reconstructed plasmid packaged with lipofectin induced efficient transduction of the small intestine, and the transfected small bowel allografts could survivor longer in nonimmunosupression rats.展开更多
目的 探讨移植肠RANTES(regulated upon activation,normal T cell expressed and secreted活化T细胞调节的,正常T细胞表达和分泌的因子)的表达在小肠移植急性排斥反应中的意义,以及他克莫司(FK506)对它的影响。方法选用成年健...目的 探讨移植肠RANTES(regulated upon activation,normal T cell expressed and secreted活化T细胞调节的,正常T细胞表达和分泌的因子)的表达在小肠移植急性排斥反应中的意义,以及他克莫司(FK506)对它的影响。方法选用成年健康雄性SD和Wistar犬鼠进行全小肠异位移植。实验分4组,第1组:非手术对照组(Wistar);第2组:同基因移植对照组(Wistar→Wistar);第3组:异基因移植组(SD→Wistar);第4组:FK506治疗组[SD→Wistar+FK506(1mg·kg^-1·d^-1,lm)]。移植术后3、5、7d取各组大鼠移植肠标本进行病理学检查,并采用免疫荧光染色和激光扫描共聚焦显微镜技术对移植肠RANTES的表达进行连续定量测定。结果异基因移植组大鼠的移植肠RANTES表达在术后均显著高于其他3个对照组(P〈0.01),其动态变化与急性排斥反应的进程呈正相关;FK506治疗组大鼠移植肠RANTES的表达明显低于未治疗组(P〈0.01)。结论RANTES阳性细胞在小肠移植急性排斥反应中发挥了重要作用,动态检测移植肠RANTES的表达变化,可能为小肠移植急性排斥反应的诊断提供早期、敏感的指标。展开更多
文摘Objective: To evaluate the local expression of CTLA4Ig gene in small intestines and its effect on prolonging survival time of the small bowel allografts. Methods: The donor small bowels were perfused ex vivo with CTLA4Ig cDNA reconstructed plasmid packaged with lipofectin vector via intra-superior mesenteric artery before transplantation. The CTLA4Ig transgene expression in the small bowel allografts was assessed by immunohistology and RT-PCR after transplantation. Results: Immunohistology and RT-PCR demonstrated expression of CTLA4Ig transgene in the allografts at least for 28 d after transplantation. Eleven cases of the 18 small bowel allografts that received CTLA4Ig gene transfection survived more than 90 d in the recipients. Conclusion: A single ex vivo intra-superior mesenteric artery infusion of CTLA4Ig cDNA reconstructed plasmid packaged with lipofectin induced efficient transduction of the small intestine, and the transfected small bowel allografts could survivor longer in nonimmunosupression rats.
文摘目的 探讨移植肠RANTES(regulated upon activation,normal T cell expressed and secreted活化T细胞调节的,正常T细胞表达和分泌的因子)的表达在小肠移植急性排斥反应中的意义,以及他克莫司(FK506)对它的影响。方法选用成年健康雄性SD和Wistar犬鼠进行全小肠异位移植。实验分4组,第1组:非手术对照组(Wistar);第2组:同基因移植对照组(Wistar→Wistar);第3组:异基因移植组(SD→Wistar);第4组:FK506治疗组[SD→Wistar+FK506(1mg·kg^-1·d^-1,lm)]。移植术后3、5、7d取各组大鼠移植肠标本进行病理学检查,并采用免疫荧光染色和激光扫描共聚焦显微镜技术对移植肠RANTES的表达进行连续定量测定。结果异基因移植组大鼠的移植肠RANTES表达在术后均显著高于其他3个对照组(P〈0.01),其动态变化与急性排斥反应的进程呈正相关;FK506治疗组大鼠移植肠RANTES的表达明显低于未治疗组(P〈0.01)。结论RANTES阳性细胞在小肠移植急性排斥反应中发挥了重要作用,动态检测移植肠RANTES的表达变化,可能为小肠移植急性排斥反应的诊断提供早期、敏感的指标。