酸缓冲剂改善了pazopanib在胃酸抑制的老鼠模型中的溶解性和吸收性
Huda Jassim Muhammad1, Tsutomu Shimada2, Arimi Fujita2
1Department of Clinical Pharmacokinetics, Graduate School of Medical Sciences, Kanazawa University, 13-1 Takara-machi, Kanazawa, 920-8641, Japan; Department of Clinical Pharmacy, College of Pharmacy, Karbala University, Karbala, 56001, Iraq.
Drug metabolism and pharmacokinetics
|March 6, 2024
概括
帕佐帕尼布的吸收被质子抑制剂减少. 在服用这些药物的患者中,将帕佐帕尼布与酸缓冲剂一起使用可以显著改善其吸收.
科学领域:
- 药理动力学 药理动力学
- 药物相互作用 药物相互作用
- 胃肠病学 胃肠病学
背景情况:
- 帕佐帕尼布的吸收高度依赖于胃的pH值.
- 质子抑制剂 (PPI) 在临床环境中显著降低了帕佐巴尼布的吸收.
- 克服PPI诱导的巴佐帕尼布生物可用性降低在临床上很重要.
研究的目的:
- 为了研究酸性饮料和酸缓冲剂对Pazopanib在体外溶解度的影响.
- 为了评估酸缓冲剂在增强PAZOPANIB吸收中的有效性,在PPI诱导的胃酸抑制的小鼠模型中.
主要方法:
- 在各种酸性溶液和缓冲剂中进行了pazopanib的体外溶解性研究.
- 用埃索梅普拉 (一种PPI) 治疗并用自来水或酸盐缓冲剂给药帕佐帕尼布的老鼠中帕佐帕尼布吸收的药理动力学分析.
主要成果:
- 随着酸缓冲体的pH值增加,帕佐帕尼布的溶解性下降.
- 在某些酸性饮料中,帕佐帕尼布的溶解度低于同等pH的酸缓冲剂.
- 在接受埃索梅普拉治疗的老鼠中,口服巴佐帕尼布的生物利用率 (AUC0-24h) 与对照组相比降低了66%.
- 与酸缓冲剂 (pH 2.3) 合并给以索梅普拉治疗的老鼠,与自来水相比,施用帕佐巴尼布增加了4.8倍的生物可用性.
结论:
- 通过使用酸缓冲剂,可以减轻pazopanib和PPI之间的药物相互作用.
- 酸缓冲剂在接受PPI治疗的患者中显示出改善巴佐帕尼布吸收的潜力.
相关概念视频
Factors Affecting Dissolution: Drug pKa, Lipophilicity and GI pH
1.4K
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...
1.4K
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
Acid Suppressive Drugs for Peptic Ulcer Disease: Proton Pump Inhibitors
430
Peptic ulcers, often induced by H. pylori infections or NSAID usage, arise from disruptions in the delicate balance of gastric acid production. Peptic ulcers stem from heightened gastric acid levels due to H. pylori infections or NSAID use. The protective mucus layer diminishes in the presence of these factors, allowing gastric acid to erode the stomach lining and form ulcers.
Gastric acid, a potent cocktail of hydrogen and chloride ions, is produced in specialized parietal cells within the...
Gastric acid, a potent cocktail of hydrogen and chloride ions, is produced in specialized parietal cells within the...
430
Acid Suppressive Drugs for Peptic Ulcer Disease: Antacids
368
In the complex environment of the gastric lumen, excessive acid secretion can lead to the formation or worsening of ulcers within the delicate mucosal layer. Antacids, such as sodium bicarbonate and calcium carbonate, provide relief by neutralizing this acid, transforming it into harmless salt and water. This neutralization process raises the gastric pH from a highly acidic level of 1 to a more basic 3-4, reducing the acidity within the stomach.
However, this neutralization reaction between...
However, this neutralization reaction between...
368
Drug Absorption: Factors Affecting GI Absorption
3.9K
The process of oral drug absorption can be influenced by several factors. Weakly acidic drugs tend to be absorbed more readily from the stomach due to their nonionized state. However, absorption may be less efficient in the upper intestine, where drugs are often ionized. Interestingly, despite the stomach's apparent advantage for drug absorption, its mucous layer can hinder diffusion. Its surface area is also smaller than the intestine's, which can further slow down the absorption rate.
3.9K
Factors Influencing Drug Absorption: Drug Dissolution
493
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...
493


![Technical Aspect of the Automated Synthesis and Real-Time Kinetic Evaluation of [11C]SNAP-7941](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2FCDNSource%2Fteasers%2F59557.jpg&w=3840&q=50)