目的 探讨采用黄芩苷预治疗对红细胞免疫的预防性效果.方法 采用人类红细胞与佐剂脂多糖(LPS)联合输注C57BL/6小鼠建立红细胞输注模型.设立(1)红细胞输注模型组;(2)未处理对照组:仅注射PBS;(3)黄芩苷预治疗组:在红细胞输注模型建立前一周每天给予小鼠黄芩苷(250 mg/(kg·day))治疗;(4)地塞米松(DEX)对照组:在红细胞输注模型建立前一周每天给予地塞米松(5 mg/(kg·day))治疗.通过流式细胞术检测小鼠血清中IgG和IgM 的表达量,并监测小鼠脾脏中的CD4 T细胞和B细胞变化.结果 与模型组相比,黄芩苷预治疗能显著降低血清IgG(24 823.0±1 452.2 vs 15 180.0±1 172.5,P＜0.05)和IgM(194 206±2 868.6 vs 112 287±9 741.5,P＜0.05)的生成.与模型组相比,黄芩苷预处理组小鼠脾脏中CD25表达明显下降(1 006.0±206.1 vs 548.4±19.1,P＜0.05),B细胞比例显著降低(31.16%±6.06%vs 15.69%±4.59%,P＜0.05),脾脏大小无显著差异[平均长度:(10±0.5)mm vs(12±0.5)mm,P＞0.05].结论 黄芩苷能够抑制红细胞免疫,表现为抑制小鼠血清中IgG和IgM的生成,同时抑制脾脏中B细胞增殖和降低CD4 T细胞活化.
Pretreatment with Baicalin Reduces the Production of IgG and IgM in a Mouse Model of Red Blood Cell Infusion
Objective To investigate the prophylactic effects of pretreatment with baicalin on erythrocyte alloimmunization.Methods A model of red blood cell(RBC)infusion was established in C57BL/6 mice through co-infusion of human RBCs and lipopolysaccharide(LPS)as an adjuvant.Mice were randomly assigned into four experimental groups:(1)RBC infusion model group;(2)Untreated control group:injection of PBS only;(3)Baicalin pretreatment group:mice were given baicalin(250 mg/(kg·day))daily for one week prior to the establishment of the RBC infusion model;(4)Dexamethasone(DEX)control group:DEX(5 mg/(kg·day))were given daily for one week prior to the establishment of the RBC infusion model.The expression levels of IgG and IgM in the mice serum were analyzed by flow cytometry,and changes in CD4 T cells and B cells in the spleen were monitored.Results Compared to the RBC infusion model group,baicalin pretreatment significantly reduced the production of serum IgG(24 823.0±1 452.2 vs.15 180.0±1 172.5,P＜0.05)and IgM(194 206±2 868.6 vs.112 287±9 741.5,P＜0.05).Compared with the model group,there was a significant decrease in the expression of CD25(1 006.0±206.1 vs.548.4±19.1,P＜0.05)and the proportion of B cells(31.16%±6.06%vs.15.69%±4.59%,P＜0.05)in the spleens of baicalin-pretreated mice,and no significant difference in the spleen size(mean length:10±0.5 mm vs.12±0.5 mm,P＞0.05).Conclusion Baicalin effectively suppresses erythrocyte alloimmunization by inhibiting the production of IgG and IgM in the serum,as well as the inhibition of B cell proliferation and CD4 T cell activation in the spleen.
BaicalinErythrocyte alloimmunizationAntibody production
万方数据
维普
