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在人类细胞中基于抗体检测NRF2的考虑因素

Alicja Dziadosz-Brzezińska¹, Sara Kusiński¹, Artur Piróg¹

¹University of Gdansk, International Centre for Cancer Vaccine Science, Kladki 24, 80-822, Gdansk, Poland.

|March 5, 2025

概括

使用抗体检测人类NRF2蛋白需要谨慎. 三种商业抗体与calmegin结合,calmegin是一种模仿西部斑块NRF2的蛋白质,可能导致NRF2水平的误解.

科学领域:

分子生物学分子生物学
细胞生物学细胞生物学
生物化学生物化学

背景情况:

核因子红色素2相关因子2 (NRF2) 是一个转录因子,对细胞防御氧化应激至关重要.
通过Western blot检测NRF2通常会显示Tris-glycine SDS-PAGE中的100kDa以上的波段.
商业抗体被广泛用于NRF2检测,但它们的特异性需要彻底验证.

研究的目的:

确定在SDS-PAGE中与人类NRF2共迁移的蛋白质,并且由抗NRF2抗体免疫降落.
在各种实验条件下评估常用的抗NRF2抗体的特异性.
用基于抗体的方法强调NRF2检测中的潜在陷.

主要方法:

质谱法用于识别由抗NRF2抗体免疫降落的蛋白质.
在基底条件下,在NRF2激活 (tert-BHQ) 后,在翻译抑制 (emetine) 后,在基底条件下进行免疫沉.
西方涂抹和免疫光被用于评估抗体特异性和蛋白质局部化.

主要成果:

研究人员发现,三种商用单克隆抗NRF2抗体也与内细胞网膜伴侣卡尔梅金结合.
卡尔梅金与SDS-PAGE中的NRF2共同迁移,并且经常产生更强的信号,可能会掩盖或被误认为NRF2.
虽然一种抗体 (细胞信号技术克隆E5F1) 在免疫光中对核NRF2表现出特异性,但其他抗体则需要通过NRF2淘汰或淘汰来验证.

结论:

商用抗NRF2抗体可能会与卡尔梅金呈现交叉反应,因此需要仔细解释西斑结果.
使用淘汰或淘汰模型对抗NRF2抗体的验证至关重要,特别是在免疫光应用中.
研究人员在分析通过基于抗体的技术获得的NRF2检测数据时,应谨慎考虑潜在的混因素.

关键词:

在我里面冷静下来.免疫光效应免疫光效应质谱测量质量谱测量单克隆抗体是一种单克隆抗体.这就是NRF2的NRF2.

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