从一个PRNP编码子129异合体vCJD患者中分离出一种新型人类子菌株
Fuquan Zhang1, Susan Joiner1, Jacqueline M Linehan1
1MRC Prion Unit at UCL, Institute of Prion Diseases, University College London, London, United Kingdom.
PLoS pathogens
|February 20, 2025
概括
牛形脑病变 (BSE) 子可以在人类中引起多个子菌株. 一个罕见的克鲁茨菲尔特-雅各布病 (vCJD) 病例发现了不同的子菌株的共同传播,挑战了以前的理解.
科学领域:
- 神经科学是一个神经科学.
- 传染性疾病 传染性疾病
- 遗传学 遗传学 是一个
背景情况:
- 转移到人类的牛形脑病变 (BSE) 会导致克鲁茨菲尔特-雅各布病 (vCJD) 的变体.
- 人类质蛋白基因 (PRNP) 编码129的多态性 (Methionine/Valine) 影响了质菌株的传播.
- 以前,大多数vCJD病例发生在129MM基因型的个体中.
研究的目的:
- 为了研究从一个具有129MV基因型的独特vCJD患者中子的传输特性.
- 确定BSE子是否会导致人类出现新的子菌株.
主要方法:
- 转基因小鼠表达人类子蛋白与不同的子129基因型被接种了来自129MVvCJD患者的子.
- 进行了神经病理学和分子分析,以表征子菌株.
- 通过初级和二级传输来评估子的特性.
主要成果:
- 来自129MVvCJD患者的子主要在大多数小鼠模型中传播了已确定的vCJD菌株.
- 一个小鼠子组传播了一种新型的子菌株,在所有PRNP编码子129基因型中均致命.
- 这种新型菌株在二次通道时表现出明显的神经病理和分子特征.
结论:
- 这些发现表明,牛牛SE子可以在单一的人类宿主中诱导不同子菌株的共同传播.
- 一种新型,有毒的子菌株的出现凸显了宿主遗传和子多样性之间的复杂相互作用.
- 这项研究扩大了我们对子病病原体和潜在传播动态的理解.
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