在体内药物代谢研究中,用于定量离线放射性计数的先进火校正模型
Sam Wouters1, Cis Van Looveren1, Fetene Tekle2
1Preclinical Sciences & Translational Safety, Johnson & Johnson, Beerse, Belgium.
Drug metabolism and disposition: the biological fate of chemicals
|December 19, 2025
概括
一种新方法改善了在人体研究中使用线下放射性计数的药物和代谢物量化. 这种先进的火校正模型提高了体内样本的精度和回收.
科学领域:
- 药理动力学和药物新陈代谢
- 分析化学 分析化学
- 放射性药物科学 放射性药物科学
背景情况:
- 对药物和代谢物的准确量化对于体内研究至关重要.
- 放射性标记质量平衡研究需要精确检测低放射性水平.
- 现有的离线放射性计数方法可能会受到信号抑制或火的影响.
研究的目的:
- 开发一种新的工作流程,用于在体内研究中准确量化药物和代谢物.
- 实施一项先进的策略,以纠正线下放射性计数中的信号抑制和火.
- 改善人类吸收,分布,新陈代谢和分泌 (ADME) 研究中的数据质量和整体恢复.
主要方法:
- 开发一种使用超高性能液体染色学 (UHPLC) 和离线放射性计数的新型工作流程.
- 实施一种新的基于矩阵的火校正模型,使用来自384个井板的2个数据集.
- 应用一个强大的四度模型来考虑异常值和矩阵诱导的火.
- 对该方法在线放射性检测和液体闪计数的验证.
主要成果:
- 新的火模型通过对矩阵诱导的信号抑制进行校正,显著提高了量化准确性.
- 在人类ADME研究中,柱子的平均恢复率增加到超过85%.
- 与在线放射性检测相比,该方法证明了更好的检测极限.
- 获得了准确的配置文件和改善的整体回收,特别是在放射性较低的样品中.
结论:
- 开发的基于矩阵的火校正模型增强了对放射性标记ADME研究的解释.
- 这种方法可以弥补线下放射性计数中的信号抑制,改善数据质量.
- 工作流允许准确评估体内样本中检测到的代谢物的重要性.
更多相关视频
12:04Fluorescence-Activated Cell Sorting-Radioligand Treated Tissue FACS-RTT to Determine the Cellular Origin of Radioactive Signal
Published on: September 10, 2021
2.7K
09:49A Whole Body Dosimetry Protocol for Peptide-Receptor Radionuclide Therapy PRRT: 2D Planar Image and Hybrid 2D+3D SPECT/CT Image Methods
Published on: April 24, 2020
10.4K
相关概念视频
One-Compartment Open Model: Wagner-Nelson and Loo Riegelman Method for ka Estimation
1.1K
This lesson introduces two critical methods in pharmacokinetics, the Wagner-Nelson and Loo-Riegelman methods, used for estimating the absorption rate constant (ka) for drugs administered via non-intravenous routes. The Wagner-Nelson method relates ka to the plasma concentration derived from the slope of a semilog percent unabsorbed time plot. However, it is limited to drugs with one-compartment kinetics and can be impacted by factors like gastrointestinal motility or enzymatic degradation.
On...
On...
1.1K
Measurement of Bioavailability: Pharmacodynamic Methods
212
Pharmacodynamic methods provide insights into a drug's effects on physiological processes over time and play a crucial role in understanding bioavailability and therapeutic efficacy. These methods can be broadly classified into acute pharmacological and therapeutic response approaches, each with distinct mechanisms and applications.The acute pharmacological response method directly correlates a drug's physiological effects, such as ECG or pupil diameter changes, to its time course in the body.
212
Measurement of Bioavailability: Pharmacokinetic Methods
236
Pharmacokinetics is a vital branch of pharmacology that examines how drugs are absorbed, distributed, metabolized, and excreted by the body. Two key methodologies in pharmacokinetics are plasma drug concentration studies and urinary drug excretion analyses, both of which provide critical insights into a drug's therapeutic efficacy and bioavailability.Plasma Drug Concentration-Time StudiesPlasma drug concentration-time studies involve analyzing blood samples at specific intervals to quantify...
236
