APP下载

小鼠皮肤移植中雷公藤内酯醇的免疫抑制作用及机制研究

2014-09-19梁阔刘爽崔叶青孙海晨罗斌万岁桂孙雪静李非

中国医药导报 2014年23期
关键词:作用机制

梁阔+刘爽+崔叶青+孙海晨+罗斌+万岁桂+孙雪静+李非

[摘要] 目的 探讨雷公藤内酯醇(Triptolide,Tri)在小鼠同种异体皮肤移植中的免疫抑制作用及其可能的作用机制。 方法 采用BALB/c小鼠作为供体,C57BL/6小鼠作为受体,建立皮肤移植模型。随机分为3组,每组8只。移植术后前6天(0~5 d)分别予腹腔注射1%吐温80溶剂(对照组)、Tri 100 μg/kg(L-Tri组)和Tri 200 μg/kg(H-Tri组)。术后观察移植皮片存活情况。并于术后第7天每组随机选取3只,切取脾脏以流式细胞术检测脾淋巴细胞中CD4+ CD25+ Foxp3+ T细胞比例。 结果 对照组、L-Tri组和H-Tri组移植皮片平均存活时间分别为(8.3±1.2)、(12.4±1.9)、(14.9±2.2)d;脾淋巴细胞中CD4+ CD25+ Foxp3+调节性T细胞比例分别为(5.6±0.8)%、(12.6±1.5)%和(16.1±2.1)%;L-Tri组及H-Tri组与对照组比较,H-Tri组与L-Tri组比较,小鼠移植皮肤平均存活时间均明显延长(P < 0.05),CD4+ CD25+ Foxp3+ T细胞数量也明显增加(P < 0.05)。 结论 Tri能够抑制移植后排斥反应,延长小鼠同种异体皮肤移植的存活时间,其免疫作用机制可能与上调移植受体CD4+ CD25+ Foxp3+ T细胞的比例有关,并且其免疫抑制作用具有一定的剂量依赖性。

[关键词] 皮肤移植;免疫抑制;雷公藤内酯醇;作用机制

[中图分类号] R657.5 [文献标识码] A [文章编号] 1673-7210(2014)08(b)-0012-04

Immunosuppressive effect and mechanism of Triptolide on skin allografts in mice

LIANG Kuo1 LIU Shuang1 CUI Yeqing1 SUN Haichen1 LUO Bin1 WAN Suigui2 SUN Xuejing2 LI Fei1▲

1.Department of General Surgery, Xuanwu Hospital of Capital Medical University, Beijing 100053, China; 2.Department of Hematology, Xuanwu Hospital of Capital Medical University, Beijing 100053, China

[Abstract] Objective To investigate the immunosuppressive effect and the possible mechanism of Triptolide on skin allografts in murine model. Methods BALB/c mice to C57BL/6 mice skin allografting models were created. The recipients were divided into three groups. The mice in the treatment groups were injected intraperitoneally with Triptolide at 100 μg/kg (low-dose Triptolide group, L-Tri group) or 200 μg/kg (high-dose Triptolide group, H-Tri group) daily in the first 6 days (0-5 days); while the mice in control group were given vehicles (1% Tween 80). The median survival time of skin allografts in each group was monitored. The proportion of CD4+ CD25+ Foxp3+ regulatory T cells in spleen tissue were tested by flow cytometry. Results The median survival time of skin allografts in the control group, L-Tri group and H-Tri group were (8.3±1.2), (12.4±1.9) d and (14.9±2.2) d respectively. The percentage of CD4+ CD25+ Foxp3+ regulatory T cells in spleen tissues of three groups were (5.6±0.8) %, (12.6±1.5)% and (16.1±2.1)% respectively. Compared with control group, the L-Tri group and H-Tri group show significantly prolonged skin allograft survival time (P < 0.05), increased percentage of CD4+ CD25+ Foxp3+ regulatory T cells (P < 0.05). Conclusion Tri can inhibit immune rejection, prolong the skin allograft survival time in mice. The anti-rejection effect of Tri may be attributed to the upregulation of regulatory T cells. In addition, the immunosuppressive effect of triptolide shows dose-dependent.endprint

[Key words] Skin transplantation; Immunosuppression; Triptolide; Mechanism

同种器官移植已成为治疗人类肾脏、心脏及肝脏等严重疾病的一种重要手段。但是,由于目前临床应用的免疫抑制剂长期使用时具有一定的毒副作用,因此研制开发新型、高效、低毒的免疫抑制剂,一直是临床关注的热点[1-2]。雷公藤内酯醇(Triptolide,Tri)是从我国传统中药雷公藤中分离出来的含有三个环氧基的二萜内酯化合物,具有较强的抗炎、抗肿瘤和免疫抑制作用[3-4]。动物实验证实其在心脏[5-6]、肾脏[7]、肝脏[8]、肺脏[9]、胰岛[10-11]等多种移植模型中均具有较好的抗排斥作用,是一种极有潜力的免疫抑制药物。但目前国内外学者对于Tri在移植中的抗排斥作用机制仍然存在较多争论[12]。本研究旨在通过观察Tri在小鼠同种异体皮肤移植中的抗排斥效果,初步探讨其可能的免疫作用机制。……

登录APP查看全文

猜你喜欢

作用机制
电子商务背景下“家庭农场”发展机制研究
翻转课堂在海外汉语教学中的作用机制
区域物流业发展对县域经济的影响刍议
疏肝活血方治疗更年期女性皮肤瘙痒症的疗效及作用机制
通过技术创新促进我镇农业结构调整
冠心丹参方及其有效成分治疗冠心病的研究进展
大数据对高等教育发展的推动研究
帕罗西汀治疗脑卒中后抑郁症的临床疗效和安全性及作用机制
低频超声透皮给药的作用机制和影响因素
企业动态能力对其绩效影响研究综述