研究实验与实验的对比. 预测pKa值用于PET放射性追踪剂
Sarah Luise Stellnberger1, Richard Harvey2, Verena Schwingenschlögl-Maisetschläger1
1Department of Pharmaceutical Sciences, Division of Pharmaceutical Chemistry, Faculty of Life Sciences, University of Vienna, Austria; Vienna Doctoral School of Pharmaceutical, Nutritional and Sport Sciences, University of Vienna, Austria.
概括
准确预测中枢神经系统 (CNS) 药物活性需要实验pKa值. 计算预测显示了差异,突出了在药物设计中需要精确的实验pKa测量.
科学领域:
- 药用化学 医学化学
- 计算化学的计算化学
- 药理学 药理学是指药理学的学科.
背景情况:
- 诸如BBB分数和中枢神经系统MPO等计算方法对于预测中枢神经系统药物活性至关重要.
- 这些预测在很大程度上取决于物理化学参数,特别是pK值.
- 对于许多化合物,特别是放射性药物,实验pKa数据很少,限制了预测准确度.
研究的目的:
- 调查中枢神经系统活性化合物的预测和实验pKa值之间的差异.
- 评估这些pKa差异对中枢神经系统活动预测得分的影响.
- 为治疗药物和放射性药物的实验pKa值生成可靠的数据集.
主要方法:
- 使用电位计和光谱计测量了46种物质 (药物和PET放射性药物) 的pKa值.
- 对比实验pKa值与来自Chemicalise和Marvin软件的in silico预测.
- 进行线性回归分析以量化预测值和实验值之间的相关性.
主要成果:
- 在实验和in silico预测的pKa值之间观察到相当大的差异.
- 线性回归显示了中间相关性 (R2(Marvin) = 0.88,R2(化学化) = 0.82). 在线性回归显示了中间相关性 (R2(Marvin) = 0.88,R2(化学化) = 0.82).
- 实验性pKa确定对于准确的药物设计至关重要.
结论:
- 实验性pKa值对于可靠的中枢神经系统药物活性预测至关重要.
- In silico pKa预测表现出可能影响药物设计和优化的局限性.
- 这项研究为药物发现研究人员提供了实验pKa数据的宝贵资源.
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