摘要
目的探讨不同免疫抑制剂或免疫抑制剂组合对新发供者特异性抗体(dnDSA)生成的抑制作用。方法对BABL/c小鼠和C57BL/6小鼠采用连续腹腔注射脾细胞的方法建立稳定产生dnDSA的小鼠模型。建模成功后,将成模小鼠分10组每组8只,分别给予吗替麦考酚酯(MMF,300nag·kgl·d11),西罗莫司(0.3nag·k^-1·d^-1),他克莫司(0.9mg·kg^-1·d^-1),环孢素A(45mg·kg^-1·d^-1),MMF(150mg·kg^-1·d^-1)+他克莫司(0.45mg·kg^-1·d^-1),MMF(150mg·kg^-1·d^-1)+环孢素A(22.5nag·kg^-1·d^-1),MMF(150mg·kg^-1·d^-1)+西罗莫司(0.15mg·kg^-1·d^-1),西罗莫司(O.15mg·kg^-1·d^-1)+他克莫司(0.45nag·kg^-1·d^-1),西罗莫司(0.15mg·kg^-1·d^-1)+环孢素A(22.5mg·kg^-1·d^-1)和等体积的生理盐水,连续灌胃4周。4周后采集各组血标本,用流式细胞术检测各组dnDSA水平。结果(1)4周后,BABL/c组、C57BL/6组小鼠的dnDSA水平分别为88.86%、25.58%,与对照组(25.33%)比较,BABL/c组dnDSA水平明显升高(89.23%与25.33%;P〈0.001),而C57BL/6组则无明显变化(25.58%与25.33%;P=0.259)。因此,选用BABL/c小鼠作为建模小鼠。(2)对成模BABL/c小鼠连续给药4周后,单药组dnDSA水平:MMF为29.31%,西罗莫司为46.33%,环孢素A为57.10%,他克莫司为66.35%,与致敏组(89.23%)对比均明显下降(P值分别为:P〈0.001,P〈0.001,《0.001,P〈0.009)。组间对比后,4种免疫抑制剂疗效为:MMF〉西罗莫司〉环孢素A=他克莫司。组合方案组中,MMF+西罗莫司组、MMF+他克莫司组、MMF+环孢素A组、西罗莫司+环孢素A组、西罗莫司+他克莫司组的dnDSA分别为31.00%,33.12%,45.18%,44.62%,61.60%;且均低于致敏组(P值分别为:P〈0.001,P%0.001,P%0.001,P%
Objective To explore the inhibition of different immunosuppressive drugs or immunosuppressive combination regiments on the development of de novo donor specific antibodies (dnDSA). Methods We used BABL/c mice and C57BL/6 mice alloimmaunized using donor splenocytes for establishing model of producing dnDSA. After that, mice were divided into 10 groups, and were administrated with mycophenolate mofetil (MMF, 300 mg. kg^-1 · d^-1 ); sirolimus (0.3 mg.kg^-1·d^-1) ; tacrolimus(0. 9 mg · kg^-1 · d^-1 ) ; cyclosporine A (45 nag· kg^-1 · d^-1 ) ; MMF ( 150 mg·kg^-1·d^-1)+tacrolimus(0.45 nag.kg^-1·d^-1); MMF (150 mg·kg^-1·d^-1) + cyclosporine A (22.5 mg. kg-1 .d-a); MMF (150 mg.kg^-1 .d^-1) + sirolimus (0. 15 mg.kg^-1 .d^-1); sirolimus (0. 15 mg. kg^-1 · d^-1 ) + tacrolimus (0. 45 mg. kg^-1· d^-1 ) ; sirolimus (0. 15 nag · kg^-1 · d^-1 ) + cyclosporine A (22. 5 mg·kg^-1 .d^-1 ) ; and placebo; respectively. Anti-serum was harvested and tested using flow cytometry. Results (1) Four weeks after sensitization, the dnDSA level in BALB/c and C57BL/6 group was 88. 86% and 25.58%. Comparing with control group(25.33%), there was a significant increase in BALB/c group (89. 23 % versus 25.33 % ; P〈0. 001 ), whereas no change was found in C57BL/6 group (25. 58% versus 25.33% ; P = 0. 259), that we chose BABL/c mice as the model for sensitization. (2)After 4 weeks of sensitization and immunosupression, dnDSA level was 29.31%, 46.33%, 57.10% and 66.35% in MMF, sirolimus, cyclosporine A and tacrolimus monotherapy group respectively. In comparison to sensitization group, dnDSA level in all monotherapy arm reduced significantly. Intra-group analysis found MMF monotherapy had the most effective inhibition of dnDSA production, sirolimus came the second, and tacrolimus and cyclosporine A had equivalent effectiveness, dnDSA level was 31.00%, 33.12%, 45. 18%, 44. 62% and 61.60% in MMF+ sirolimus, MMF + tacrolimus, MMF+ cyclosporine
出处
《中华器官移植杂志》
CAS
CSCD
2017年第7期390-396,共7页
Chinese Journal of Organ Transplantation