艾普塔米尔总是有约束力吗? 在Aptamer和低分子量化合物之间证明结合亲和时,需要采用多面分析方法
Fabio Bottari1, Elise Daems1,2, Anne-Mare de Vries3,4
1AXES Research Group, Department of Bioscience Engineering, University of Antwerp, Antwerp, 2020, Belgium.
Journal of the American Chemical Society
|November 9, 2020
概括
这项研究显示,常用的安培酸缺乏特定的结合能力,这对其在诊断中的使用构成了挑战. 在检测小分子时,多面分析方法对于验证aptamer性能至关重要.
科学领域:
- 生物化学和分子生物学
- 分析化学
- 生物技术
背景情况:
- 在各种检测策略中,aptamers越来越多地被用作生物识别元素.
- 在文献中缺乏标准化的质量控制方案导致不一致和不可靠的aptamer性能数据.
- 对于小型有机分子来说,现有的表征阿普他结合的方法可能不够强大.
研究的目的:
- 通过多种分析技术,批判性地评估选择的体对其目标小分子的结合能力.
- 调查一种涉及黄金纳米粒子 (AuNPs) 的常见色度测试的可靠性.
- 建立一个全面的分析框架来验证aptamer的性能.
主要方法:
- 使用异热定位热量计 (ITC),原生纳米电子喷射电离质谱法 (原生ESI-MS) 和质子核磁共振光谱法 (1H NMR) 对阿普坦结合的比较分析.
- 在溶液和黄金纳米颗粒 (AuNPs) 的存在下对安培胺结合的评估.
- 使用可卡因/昆因 (MN4) 和l-阿尔吉尼纳胺 (1OLD) 的明确特征的体的分析方法的验证.
主要成果:
- 与之前的报道相反,没有一个测试的安培素合剂表现出与安培素的特定结合.
- 使用AuNPs进行的色度测定产生了相互矛盾的结果,并未证实特异性安培结合.
- 包括AuNP在内的ITC和1HNM研究未能提供特异性安培胺相互作用的证据.
结论:
- 这项研究突出显示了报告的胺结合亲缘关系的显著差异,特别是在小型有机分子中.
- 单一的分析方法是不够的;结合热力学和结构数据的多面方法对于准确的aptamer验证至关重要.
- 这些发现强调了在诊断和检测系统中应用aptamer之前需要严格的质量控制和验证.
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