Prolonged Small Bowel Allografts Survival by CTLA4Ig Gene Transfection in Rats

摘要

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 trans-plantation 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.