将新生物基质引入验证的生物分析方法的影响:专注于基质蛋白质含量
1Department of Pharmaceutical Sciences, Gatton College of Pharmacy, East Tennessee State University, Johnson City, Tennessee, USA.
Biomedical chromatography : BMC
|May 1, 2024
概括
部分生物分析方法验证需要在改变生物矩阵时仔细规划. 矩阵蛋白质含量显著影响分析物的回收和稳定性,特别是在尿液或脑脊液等低蛋白质样本中.
科学领域:
- 生物分析化学 生物分析化学
- 药品分析 药品分析
- 方法验证方法验证
背景情况:
- 国际准则建议在已建立的生物分析试验中对新的生物矩阵进行部分验证.
- 从高蛋白质矩阵 (血清/血) 到低蛋白质矩阵 (尿液,脑脊液,口腔液) 的过渡测定可以导致分析物回收不一致.
- 低恢复可能被误认为是信号抑制或药物不稳定,特别是在低体积或低度样本中.
研究的目的:
- 突出矩阵蛋白质含量在部分生物分析方法验证中的关键作用.
- 讨论与将生物分析方法转换为低蛋白质矩阵相关的挑战.
- 确定在具有挑战性的矩阵中减轻非特异性结合和改善分析物回收的策略.
主要方法:
- 对分析物化学和样品容器相互作用的评估.
- 对不同生物矩阵之间的特性进行比较,重点关注蛋白质含量.
- 评估潜在的缓解策略,如表面活性剂,牛血清白蛋白和β-cyclodextrin.
主要成果:
- 低蛋白质矩阵可能导致分析物回收不一致,可能被误认为信号抑制或不稳定.
- 与容器的吸附/吸收相互作用在低蛋白环境中得到放大.
- 较高的矩阵蛋白质含量通常会提高分析物的稳定性.
结论:
- 矩阵蛋白质含量是一个关键因素,在部分生物分析方法验证过程中不应被忽视.
- 了解矩阵性质对于成功将测试转移到多种生物样本至关重要.
- 积极考虑矩阵效应可以防止关于药物恢复和稳定性的错误结论.
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