转基因小鼠表达一种髓基蛋白特异性T细胞受体,会发展自发的自身免疫力
J Goverman1, A Woods, L Larson
1Division of Biology, California Institute of Technology, Pasadena 91125.
Cell
|February 26, 1993
概括
研究人员创造了一种针对多发性硬化症 (MS) 的新老鼠模型,该模型自发地发展出该疾病. 这种模型有助于研究导致MS等自身免疫性疾病的遗传和环境因素.
科学领域:
- 免疫学 免疫学 免疫学
- 神经科学是一个神经科学.
- 遗传学 是一个遗传学.
背景情况:
- 多发性硬化症 (MS) 是一种复杂的自身免疫性疾病,影响中枢神经系统.
- 目前的动物模型通常需要特定的诱导方法,限制了自发性疾病研究.
- 了解遗传和环境触发因素对于开发新的MS疗法至关重要.
研究的目的:
- 开发一种新的转基因小鼠模型,自发地发展出模仿人类多发性硬化症的自身免疫性疾病.
- 调查特异于髓基蛋白 (MBP) 的自反应性T细胞在疾病发展中的作用.
- 探索在自发性自身免疫病原发生过程中遗传倾向和环境因素之间的相互作用.
主要方法:
- 转基因小鼠的构建表达了针对髓基蛋白 (MBP) 特定的重新排列的T细胞受体.
- 评估T细胞耐受性诱导和淋巴体器官中自反应性T细胞的存在.
- 使用MBP,辅助剂和百日咳毒素诱导实验性过敏性脑膜炎 (EAE).
- 在常规环境中的小鼠中自发EAE发展的比较与特定无病原体 (SPF) 环境.
主要成果:
- 转基因小鼠表现出缺乏外围T细胞耐受性,并拥有功能性,自身反应性T细胞.
- 小鼠在免疫接种MBP和辅助/百日咳毒素后,或仅用百日咳毒素后,就发生了EAE.
- 在非无菌条件下的小鼠中发生了自发的EAE,但在无菌的SPF环境中得到了预防.
- 这表明,在这个模型中,环境因素对自身免疫性疾病的自发发病至关重要.
结论:
- 开发的转基因小鼠模型有效地回顾了与人类多发性硬化症相似的自发性自身免疫疾病.
- 环境因素,如微生物暴露,在引发遗传敏感个体自身免疫性疾病方面发挥着重要作用.
- 该模型为剖析自发性自身免疫性疾病背后的复杂遗传和环境相互作用提供了一个有价值的平台.
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