优化减少西部抹杀分析变异:使用复制试样,多重规范化方法和样本加载位置
1Scientific Research Department, Armed Forces Radiobiology Research Institute, Uniformed Services University of the Health Sciences, Bethesda, MD, USA.
Analytical biochemistry
|June 11, 2023
概括
这项研究优化了Western blot (WB) 分析,在多个凝中获得一致的结果. 使用目标蛋白总和和分析复制的规范化显著降低了WB试验中的可变性.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 生物化学 生化学
背景情况:
- 西方斑点 (Western blot,简称WB) 是分子生物学和免疫学的基石技术.
- 实现可重复的WB结果,特别是在多个凝之间,由于固有的变异性而构成重大挑战.
- 评估和改善WB测试性能的标准化方法对于可靠的数据解释至关重要.
研究的目的:
- 通过应用分析仪器测试方法来评估西部斑点 (WB) 分析的性能.
- 确定最佳的规范化策略,以减少WB测定中的变异性,特别是在分析多个凝样本时.
- 提高WB数据的可靠性和可重复性,用于复杂的实验设计.
主要方法:
- 使用LPS刺激的RAW 264.7小鼠巨细胞溶解物来激活MAPK和NF-kB信号通路.
- 在多个凝中对聚合细胞溶解体进行了WB分析,量化了p-ERK,ERK,IkBβ和非标蛋白的水平.
- 通过分析变化系数 (CV) 和最大/最小值比率 (Max/Min) 来比较各种规范化方法 (总车道蛋白,%控制,p-ERK/ERK比率) 和样本分组.
主要成果:
- 常见的规范化技术并不总是产生最低的变化系数 (CV) 或最大/最小值比率 (Max/Min).
- 使用目标蛋白值和分析复制的总和进行规范化,在最大限度地减少变化方面被证明是最有效的.
- 优化的方法实现了较低的CVs (5-10%) 和Max/Min比率 (1.1),表明WB过程引入的可变性大幅减少.
结论:
- 西方斑点 (WB) 过程引入了可以使用分析仪器测试原则量化的变化.
- 规范化策略显著影响WB结果的可重现性,目标蛋白总和和复制优越.
- 开发的规范化方法可以更可靠地解释涉及多个凝的复杂WB实验.
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