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- W3029399045 abstract "目的 探讨负载电鳗乙酰胆碱受体(TAChR)免疫优势肽段α146-162(Tα146-162)的不成熟髓源树突状细胞(Imdc),即Tα146-162-Imdc对实验性自身免疫性重症肌无力(EAMG)的预防作用及其机制.方法 (1)24只C57BL/6小鼠随机分为Tα146-162-Imdc组、Imdc组、对照组、正常组,每组6只.Tα146-162-Imdc组、Imdc组和对照组小鼠皮下注射TAChR抗原乳剂(作为第0天).第7天,Tα146-162-Imdc组皮下注射Tα146-162-Imdc,Imdc组和对照组分别注射对照Imdc 和磷酸盐缓冲液(PBS).正常组小鼠不做干预.第14天检测淋巴细胞增殖反应.(2)另外24只C57BL/6小鼠随机分为预防组和EAMG组.每只小鼠在第0、30、60天皮下注射抗原乳剂诱导EAMG.预防组每次免疫后3 d皮下注射Tα146-162-Imdc,对照组皮下注射PBS.观察发病情况并进行肌力评分.第90天结束观察.(3)3H-TdR掺入法检测淋巴细胞增殖反应,酶联免疫吸附实验检测淋巴细胞培养液上清中干扰素(IFN)-γ、白细胞介素(IL)-6的含量.结果 (1)Tα146-162-Imdc组、Imdc组、对照组和正常组TAChR特异性淋巴细胞增殖反应值(放射性荧光闪烁计数)分别为3314.1±571.3、7717.5±1283.4、8608.6±1458.9、922.9±109.3,与Imdc组和对照组相比,Tα146-162-Imdc组抗原特异性淋巴细胞增殖反应显著降低(P《0.01).(2)预防组和EAMG组临床评分分别为(0.33±0.65)、(1.46±1.08)分,差异有统计学意义(P《0.01);预防组和EAMG组发病率分别为3/12(25%)和9/12(75%)只,差异有统计学意义(P《0.05).(3)预防组和EAMG组TAChR特异性淋巴细胞增殖反应值分别为3347.6±556.9、9416.2±1546.5,预防组显著低于EAMG组(P《0.01).(4)预防组和EAMG组淋巴细胞在TAChR刺激下分泌IFN-γ分别为(117.6±18.5)、(363.1±63.2) pg/ml,分泌IL-6为(49.7±9.9)、(90.6±13.6)pg/ml;与EAMG组相比,预防组淋巴细胞抗原特异性IFN-γ、IL-6分泌显著减少(P《0.01).结论 Tα146-162-Imdc能抑制TAChR预致敏T细胞免疫反应,预防EAMG的发生.Tα146-162-Imdc诱导免疫耐受与抗原特异性淋巴细胞增殖和IFN-γ、IL-6的分泌降低有关。" @default.
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- W3029399045 date "2006-04-23" @default.
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- W3029399045 title "Prevention of experimental autoimmune myasthenia gravis by dendritic cell pulsed with Tα146-162" @default.
- W3029399045 doi "https://doi.org/10.3760/j.issn:1006-7876.2006.04.003" @default.
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