供体特异性输血诱导CD8+CD28-调节性T细胞在肝移植急性排斥反应中的作用

目的 通过供体特异性输血(DST)诱导机体产生抗原特异性CD8+CD28-调节性T细胞(CD8+CD28-Tr),评价其对大鼠肝移植急性排斥反应的抑制作用.方法 采用DST在正常BrownNorway(BN)大鼠体内诱导针对LEW抗原的CD8+CD28-Tr,体外验证其免疫抑制活性之后将其输注给LEW→BN肝移植急性排斥模型受体,观察输注后大鼠的生存时间和肝脏病理学表现.采用SPSS11.0软件进行Log-Rank检验,比较大鼠生存率的差异.结果 DST可在正常BN大鼠体内诱导大量CD8+CD28-Tr产生,其在体外具有免疫抑制活性,体内输注可缓解大鼠肝移植急性排斥反应(LEw→BN).结论 DST可以在正常大鼠体内诱导大量CD8+CD28-Tr产生,其体内输注可以抑制大鼠肝移植急性排斥反应,DST可能有望成为体内诱导特异性CD8+CD28-Tr的途径之一.     

Regulation of macrophage and dendritic cell function by pathogens and through immunomodulation in the avian mucosa

Macrophages (MPh) and dendritic cells (DC) are members of the mononuclear phagocyte system. In chickens, markers to distinguish MPh from DC are lacking, but whether MPh and DC can be distinguished in humans and mice is under debate, despite the availability of numerous markers. Mucosal MPh and DC are strategically located to ingest foreign antigens, suggesting they can rapidly respond to invading pathogens.