在没有防腐剂的冷保存组织中优化RNA质量:防腐剂的影响,解方法和组织分量尺寸
Cong Zou1,2, Mengxue Yu1,2, Hongwei Peng1
1Department of Biological Repositories, Zhongnan Hospital of Wuhan University, Wuhan, China.
BMC biotechnology
|November 4, 2025
概括
在冷组织中保存RNA需要特定的方法. 在解过程中添加RNALater,并使用适当的解温度和阿里克大小,可以显著改善RNA完整性,特别是在结解周期后.
科学领域:
- 生物医学研究生物医学研究
- 分子生物学分子生物学
- 结冷保存技术 结冷保存技术
背景情况:
- 在冷解周期期间的RNA降解对未使用防腐剂存储的冷保存组织构成挑战.
- 现有的RNA保存剂如TRIzol和RNALater对新鲜组织有效,但它们对档案冷组织的实用性尚未得到充分证实.
研究的目的:
- 评估冷,未保存的子脏组织的RNA保存策略.
- 为了确定最佳条件,考虑解温度,防腐剂,处理延迟,组织分数大小和冷-解周期.
主要方法:
- 在冷的子脏组织上评估RNA保存策略.
- 测试的关键变量:解温度 (冰与室温),防腐剂 (RNALater,TRIzol,RL溶解缓冲器),处理延迟,组织分量大小 (70-300毫克),以及冷-解周期.
- 在冷保存的人类和小鼠脏组织上的验证实验.
主要成果:
- 与室温处理的组织相比,在冰上解的防腐剂处理的组织显示出显著更高的RNA完整性 (p<0.01).
- RNALater产生了最好的RNA质量 (RNA完整数[RIN]≥8).
- 小组织量 (≤30毫克) 保持RIN ≥8,而较大的量 (250-300毫克) 与-20°C解相比,在冰融化时显示RIN明显较低.
- 建议在 -20°C下解,以获得较大的分量,并尽量减少冷解周期.
结论:
- 防腐剂,组织分量大小和解方法极大地影响冷组织中的RNA质量.
- 建议包括在解过程中添加RNALater,在较小的样本 (≤100毫克) 中使用冰解或在较大的样本中使用-20°C解,并最大限度地减少冷-解周期.
- 观察到的物种间的差异突显出需要量身定制的方法.
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