使用全球敏感性分析来评估弱基本化合物的口服吸收:二皮里达摩尔的一个案例
Siddharth S Kesharwani1, Guillaume Louit2, Fady Ibrahim3
1US Early Development Biopharmacy, Synthetics Platform, Sanofi, 350 Water St, Cambridge, MA, 02141, USA.
Pharmaceutical research
|March 28, 2024
概括
全球系统分析 (GSA) 通过确定关键参数来改进口服吸收建模,从而更准确地预测药物度和暴露. 这种方法可以提高药物开发早期的决策能力.
科学领域:
- 药理动力学和药物新陈代谢
- 计算机建模和模拟
- 制定 发展 制定 发展
背景情况:
- 口服吸收模型对于预测体内药物行为至关重要.
- 了解影响最高血度 (Cmax) 和曲线下的面积 (AUC) 的因素对于药物开发至关重要.
- 全球系统分析 (GSA) 为解剖复杂的生物系统提供了一个框架.
研究的目的:
- 将全球系统分析 (GSA) 应用于口服吸收建模,以提高理解和准确性.
- 为了确定关键的药物物质,药物产品和影响二皮里达摩尔口服吸收的生理参数.
- 引导体外实验,并在药物开发早期进行风险评估.
主要方法:
- 采用GSA分析影响二皮里达摩尔Cmax和AUC的参数,二皮里达摩尔是一种模型弱基化合物.
- 基于GSA的洞察力,设计了体外实验,重点是不同胆汁盐度的溶解性和沉动力学.
- 构建了一个机械口服吸收模型,整合了沉行为.
主要成果:
- GSA强调了降水动力学及其与胆盐度的关系的重要性.
- 沉集成机械模型准确预测了临床研究中观察到的平均血形状,Cmax和AUC.
- 这表明了机械模型在结合关键生理和配方因素时的预测能力.
结论:
- 全球系统分析 (GSA) 对于在早期开发过程中指导体外研究非常有价值.
- GSA有助于识别构建强大的数学模型所必需的关键参数.
- 这种综合方法提高了对口服吸收预测的信心,并支持药物开发中的知情决策.
相关概念视频
Factors Influencing Drug Absorption: Drug Dissolution
483
The pharmacokinetic journey of drugs from solid oral dosage forms into systemic circulation is multifaceted. It begins with disintegration, a prerequisite ensuring a solid dosage form's subdivision into minute particles. Dissolution occurs next as these granulated entities solubilize in gastrointestinal fluids. This solubilization is crucial for the succeeding stage, permeation, which describes the traversal of the drug across the intestinal membrane and its subsequent entry into the blood...
483
Factors Affecting Dissolution: Drug pKa, Lipophilicity and GI pH
1.3K
Drug absorption within the gastrointestinal (GI) tract is a complex process influenced by several critical factors, including the site pH, the drug's dissociation constant (pKa), and the drug's lipophilicity. The GI tract exhibits a pH gradient, with an acidic environment in the stomach and a more alkaline environment in the small intestine. This pH variation directly affects the ionization state of drugs.
A drug's pKa and the pH of the gastrointestinal (GI) tract play crucial roles...
A drug's pKa and the pH of the gastrointestinal (GI) tract play crucial roles...
1.3K
Factors Affecting Dissolution: Drug Permeability, Stability and Stereochemistry
206
Orally administered drugs primarily enter the systemic circulation via passive diffusion through the intestinal membranes. The drug's absorption is influenced by drug stability in the gastrointestinal GI tract, membrane permeability, the surface area available for absorption, luminal drug concentration, and residence time in the lumen. Drug permeability can be enhanced by adjusting the lipophilicity, polarity, or molecular size of the drug, promoting its passive transport across intestinal...
206
Factors Influencing Drug Absorption: Physicochemical Parameters
274
The physicochemical characteristics of drugs play a crucial role in formulating stable and bioavailable drug products. The solubility of a drug, governed by the varying pH along the GI tract and its dissociation constant (pKa), is pivotal in determining its ionization state and absorption rate. Notably, weak acids and bases remain unionized and are absorbed more rapidly.
Enhanced drug absorption can be achieved by reducing particle sizes and increasing surface areas, thereby facilitating...
Enhanced drug absorption can be achieved by reducing particle sizes and increasing surface areas, thereby facilitating...
274
Factors Influencing Drug Absorption: Disease States and Pharmacology
510
Multiple disease states can significantly influence the oral drug absorption process by affecting blood flow and the functionality of the gastrointestinal (GI) system. Various GI diseases, including conditions that alter GI motility, such as diarrhea, decreased acid secretions (achlorhydria), and infections, have been associated with reduced drug absorption.
Substances such as alcohol and specific drugs, including antineoplastics, can also negatively impact drug absorption. For instance,...
Substances such as alcohol and specific drugs, including antineoplastics, can also negatively impact drug absorption. For instance,...
510
Methods for Studying Drug Absorption: In situ
231
In situ experiments, such as the Doluisio method and Single-Pass Perfusion technique, provide critical insights into drug uptake by simulating in vivo conditions for drug absorption.
The Doluisio method involves perfusing a prepared segment of a rat's small intestine with a solution of radiolabeled drug and a non-absorbable marker. This helps to differentiate between absorbed and non-absorbed drug concentrations. The intestinal segment is connected at both ends using tubing and syringes,...
The Doluisio method involves perfusing a prepared segment of a rat's small intestine with a solution of radiolabeled drug and a non-absorbable marker. This helps to differentiate between absorbed and non-absorbed drug concentrations. The intestinal segment is connected at both ends using tubing and syringes,...
231


