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相关概念视频

Bioavailability Enhancement: Drug Stability Enhancement and GI Retention01:05

Bioavailability Enhancement: Drug Stability Enhancement and GI Retention

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Body:Improving a drug's stability in the gastrointestinal (GI) tract is paramount for enhancing its bioavailability and therapeutic effectiveness. Various strategies are employed to protect the drug from the harsh gastric milieu and to ensure its release and absorption at the desired site within the GI tract.Polymer coatings are one such method used to shield drugs from the stomach's acidic environment. By preventing premature drug release, these coatings improve the bioavailability of unstable...
269
Bioavailability Enhancement: Drug Solubility Enhancement01:16

Bioavailability Enhancement: Drug Solubility Enhancement

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Body:Bioavailability is a critical factor in determining a drug's effectiveness. It refers to the proportion of a drug that enters the circulation when introduced into the body and is, as a result, able to have an active effect. Enhancing bioavailability is essential for drugs with poor solubility, as it can significantly impact their therapeutic efficacy. Various methods are employed to increase the solubility of drugs, thereby enhancing their bioavailability.Micronization and nanonization are...
345
Bioavailability Enhancement: Drug Permeability Enhancement01:27

Bioavailability Enhancement: Drug Permeability Enhancement

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Body:After oral administration, poor permeability often limits the rate at which drugs are absorbed through the intestinal epithelium. Enhancing drug permeability is crucial for effective therapy, and several strategies have been developed to overcome this challenge.One effective strategy involves the use of lipid-based formulations. These formulations enhance dissolution and solubility, targeting physiological mechanisms to increase drug absorption. This includes stimulating bile salt...
269
Bioavailability Enhancement: Determination and Conceptual Approaches in Overcoming Bioavailability Problems01:22

Bioavailability Enhancement: Determination and Conceptual Approaches in Overcoming Bioavailability Problems

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Body:Bioavailability is a critical pharmacological concept that measures the extent and rate at which an active drug ingredient or therapeutic moiety enters the systemic circulation, remaining unchanged. It's a pivotal factor in determining a drug's efficacy and safety.The Biopharmaceutics Classification System (BCS) plays an essential role in drug development by categorizing drugs into four classes based on their solubility and permeability. This classification aids in understanding drug...
270
Factors Affecting Dissolution: Drug Permeability, Stability and Stereochemistry01:20

Factors Affecting Dissolution: Drug Permeability, Stability and Stereochemistry

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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...
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Factors Affecting Dissolution: Drug pKa, Lipophilicity and GI pH01:21

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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...
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基于2-基-β-环素的复合物改善了多的溶解性和生物可访问性:通过验证的HPLC-DAD方法进行评估.

Eleonora Perak Junaković1, Anja Vujnović1, Nada Oršolić2

  • 1Laboratory for Analysis of Veterinary-Medicinal Products, Croatian Veterinary Institute, Savska cesta 143, 10000 Zagreb, Croatia.

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概括

这项研究开发了一种经过验证的HPLC-DAD方法来量化与HP-β-CD复合的多. 复合改善了溶解性和稳定性,但限制了这些有益化合物的肠道透.

关键词:
在 HPLC DADAD 中.生物可访问性 生物可访问性循环德克斯特林 (cyclodextrins) 是一个循环德克斯特林.溶解化是一种冷化.方法验证方法的验证方法.聚醇是一种多醇.的提取物 的提取物静态的体外消化在体外消化.

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科学领域:

  • 自然产品 化学 化学
  • 分析化学 分析化学
  • 药理动力学 药理动力学

背景情况:

  • 的多提供治疗效益,但其口服生物利用性较差.
  • 开发稳定,水溶性 прополис配方对于口服输送至关重要.

研究的目的:

  • 开发和验证HPLC-DAD方法,用于量化HP-β-CD复合体中的多.
  • 评估这些复杂多的胃肠道行为和生物可访问性.

主要方法:

  • 一种绿色复合方法,使用2 - 基-β - 环氧化 (HP-β-CD) 和冷化.
  • 开发和验证一个同位素HPLC-DAD方法用于多的量化.
  • 模拟胃肠道消化和肠道生物可访问性模型.

主要成果:

  • 在HP-β-CD矩阵中分析多的HPLC-DAD方法是线性,灵敏和精确的.
  • 惠普-β-CD复合增强了多溶解性和胃肠道稳定性.
  • 肠道生物可访问性有所不同,但复杂化并没有增加肠道透.

结论:

  • 验证的分析方法对于研究复杂的自然产品至关重要.
  • HP-β-CD复合改善了多的可溶性和稳定性,但对肠道吸收有局限性.
  • 需要进一步的策略来增强多的口服输送.