一个基于生理学的药物动力学模型,用于在肺外部处置结核病药物
Aparna Ramachandran1,2, Chetan J Gadgil1,2,3
1Chemical Engineering and Process Development Division, Council of Scientific and Industrial Research-National Chemical Laboratory, Pune, India.
CPT: pharmacometrics & systems pharmacology
|July 11, 2023
概括
一个新的模型模拟了肺外结核病部位的结核病药物水平. 里芬素和异化的度足够,但乙胺醇和皮拉津胺可能不足以有效治疗.
科学领域:
- 药理动力学和药物新陈代谢
- 传染性疾病 传染性疾病
- 计算生物学 计算生物学
背景情况:
- 结核病 (TB) 是主要的传染性死亡原因.
- 肺外结核 (EPTB) 影响肺以外的器官,缺乏明确的最佳治疗方案.
- 了解EPTB地点的药物药理动力学至关重要,但研究不足.
研究的目的:
- 为EPTB开发一个全身生理学基础的药理动力学 (PBPK) 模型.
- 模拟肺和淋巴结中的药物度,常见的EPTB地点.
- 在EPTB地点评估一线抗结核药物疗效.
主要方法:
- 制定了一种PBPK模型,其中包括肺和淋巴结的药物分布.
- 估计和验证的模型参数使用Rifampicin,ethambutol,isoniazid和pyrazinamide的血度数据.
- 模拟药物度与EPTB地点的临界度进行了比较.
主要成果:
- 该PBPK模型准确地预测了药物度,匹配验证数据和实验值.
- 模拟显示,在大多数EPTB地点里,利芬素和异化的度超过了临界水平.
- 在大多数模拟的EPTB场景中,预计乙醇和皮拉津胺度将低于临界水平.
结论:
- 开发的PBPK模型为EPTB的抗结核病药物行为提供了有价值的见解.
- 目前的一线抗结核病药物疗法可能需要优化EPTB中的乙墨和皮拉津胺.
- 进一步研究EPTB的药理动力学对于改善治疗结果至关重要.
更多相关视频
相关概念视频
01:07Physiological Pharmacokinetic Models: Incorporating Hepatic Transporter-Mediated Clearance
61
Drug transporters are critical in drug absorption, distribution, and excretion processes. They should be included in physiological-based pharmacokinetic (PBPK) models, which help predict human drug disposition. However, predicting this is challenging during drug development, especially when liver transport is involved. However, with a realistic representation of body transport processes, an accurate model may be possible.
A recent model describes pravastatin's hepatobiliary excretion,...
A recent model describes pravastatin's hepatobiliary excretion,...
61
01:13Physiological Pharmacokinetic Models: Assumption with Protein Binding
75
Physiological models with protein binding in pharmacokinetics offer a sophisticated approach to understanding drug disposition. These models consider drug-protein interactions, enabling them to effectively predict drug concentrations in different organs and tissues. This precision aids in accurate drug dosing, providing a significant advantage over conventional models. A key process within these models is equilibration, which ensures that drug concentrations achieve a steady state within the...
75
01:26Pharmacokinetic Models: Comparison and Selection Criterion
109
Physiological and compartmental models are valuable tools used in studying biological systems. These models rely on differential equations to maintain mass balance within the system, ensuring an accurate representation of the dynamic processes at play.
Physiological models take a detailed approach by considering specific molecular processes. They can predict drug distribution, metabolism, and elimination changes, providing a comprehensive understanding of how drugs interact with the body.
Physiological models take a detailed approach by considering specific molecular processes. They can predict drug distribution, metabolism, and elimination changes, providing a comprehensive understanding of how drugs interact with the body.
109
01:15Model Approaches for Pharmacokinetic Data: Physiological Models
78
Physiological models in pharmacokinetics are instrumental in understanding the distribution and elimination of drugs within the body. These models describe the drug concentration within target organs, influenced by factors such as drug uptake, tissue volume, and blood flow. Drug uptake is governed by the partition coefficient, which signifies the drug concentration ratio in tissue to that in the blood. The blood flow rate to a specific tissue is expressed as Qt, and the rate of change in tissue...
78
01:20Pharmacokinetic Models: Overview
805
Pharmacokinetic models utilize mathematical analysis to achieve a detailed quantitative understanding of a drug's life cycle within the body. They are instrumental in simulating a drug's pharmacokinetic parameters, predicting drug concentrations over time, optimizing dosage regimens, linking concentrations with pharmacologic activity, and estimating potential toxicity.
There are three primary types of models: empirical, compartment, and physiological. Empirical models, with minimal...
There are three primary types of models: empirical, compartment, and physiological. Empirical models, with minimal...
805
01:06Model Approaches for Pharmacokinetic Data: Distributed Parameter Models
96
Pharmacokinetic models are mathematical constructs that represent and predict the time course of drug concentrations in the body, providing meaningful pharmacokinetic parameters. These models are categorized into compartment, physiological, and distributed parameter models.
The distributed parameter models are specifically designed to account for variations and differences in some drug classes. This model is particularly useful for assessing regional concentrations of anticancer or...
The distributed parameter models are specifically designed to account for variations and differences in some drug classes. This model is particularly useful for assessing regional concentrations of anticancer or...
96