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在DNA提取中进行子播种活动:对实验室生物安全的影响

Sarah C Gresch^1,2, Tamara Morrill³, Maddy Ellis-Cramer^1,2

¹Department of Veterinary and Biomedical Sciences, College of Veterinary Medicine, University of Minnesota, St. Paul, MN, USA.

|January 29, 2026

概括

标准的DNA提取套件不能消除传染性子 (PrPSc),造成生物安全风险. 在DNA化物中检测到子,表明从受感染的组织中转移. 用适当的生物安全措施处理来自阳性来源的DNA.

科学领域:

神经科学是一个神经科学.
生物化学生物化学
微生物学微生物学

背景情况:

传染性子 (PrPSc) 抵抗了像蛋白酶K (PK) 这样的标准降解方法.
核酸提取物通常被认为是非传染性的,缺乏传统的病原体.
在DNA提取中PrPSc共同净化的潜力仍然是一个未被认可的生物安全问题.

研究的目的:

为了调查商业DNA提取套件是否共净化传染性子 (PrPSc).
评估与子感染组织的DNA净化相关的生物安全风险.

主要方法:

两个实验室独立测试了基于过器和基于磁珠的DNA提取套件.
使用了患有慢性衰竭疾病 (CWD) 的白尾鹿和子感染的仓鼠大脑的组织.
使用实时震动诱导转换 (RT-QuIC) 测量了DNA化物和源组织中的PrPSc播种活性.

主要成果:

商用DNA提取套件在消除PrPSc.方面无效.
在DNA疏解物和源组织中的PrPSc播种活动之间发现了实质性的一致性.
RT-QuIC检测到PrPSc在DNA溶解物中,证实了转移到纯化的DNA中.

结论:

标准的DNA提取套件不能消除PrPSc,这可能构成生物安全风险.
来自PrPSc阳性组织的DNA化物可能保留感染性.
当处理受影响来源的DNA时,适当的生物安全协议至关重要.

关键词:

生物安全生物安全提取DNA 提取DNA的方法传染性子 (PrPSc) 传染性子慢性衰竭疾病 (CWD) 是一种慢性衰竭疾病.蛋白酶K (PK) 是一种蛋白质酶.实时震动诱导的转换 (RT-QuIC)白尾鹿 (WTD) 是一种野生动物.

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