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相关概念视频

Drug Delivery: Parenteral Route01:29

Drug Delivery: Parenteral Route

309
The parenteral route is a critical method of drug administration. It delivers compounds directly into the systemic circulation and bypasses the gastrointestinal tract. This approach is particularly advantageous for drugs that exhibit poor absorption or instability when administered orally.
There are three primary parenteral routes: intravenous (IV), intramuscular (IM), and subcutaneous (SC). The IV route introduces the drug directly into the bloodstream, ensuring immediate action. The IM route...
309
Factors Affecting Dissolution: Polymorphism, Amorphism and Pseudopolymorphism01:21

Factors Affecting Dissolution: Polymorphism, Amorphism and Pseudopolymorphism

240
Polymorphism refers to the existence of a drug substance in multiple crystalline forms, known as polymorphs. Recently, this term has been expanded to include solvates (forms containing a solvent), amorphous forms (non-crystalline forms), and desolvated solvates (forms from which the solvent has been removed).
Some polymorphic crystals possess lower aqueous solubility than their amorphous counterparts, leading to incomplete absorption. For instance, the oral suspension of Chloramphenicol, which...
240
Drug Delivery: Enteral Route01:18

Drug Delivery: Enteral Route

329
The enteral drug administration involves three primary routes: oral, sublingual, and buccal. Oral ingestion is the most prevalent, safe, economical, and convenient method for drug administration. However, it has certain drawbacks, including limited absorption due to the drug's low water solubility or poor membrane permeability, possible emesis from GI mucosa irritation, destruction of drugs by digestive enzymes or low gastric pH, and irregular absorption along with food or other drugs.
329
Factors Affecting Dissolution: Drug Permeability, Stability and Stereochemistry01:20

Factors Affecting Dissolution: Drug Permeability, Stability and Stereochemistry

146
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...
146
Factors Influencing Drug Absorption: Pharmaceutical Parameters01:28

Factors Influencing Drug Absorption: Pharmaceutical Parameters

101
Solid dosage forms such as tablets and capsules undergo rigorous manufacturing processes to ensure stability and effectiveness. Their dissolution and absorption properties are influenced significantly by the choice of excipients (inactive ingredients that serve various roles in the formulation), and the methodology applied during production. The manufacturing parameters, such as compression force and granulation techniques, significantly affect dissolution rates. Elevated compression forces...
101

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聚酸基核心外瓶刷聚合物:一种用于药物封装的多功能平台

Bonan Zhao1, Jingyuan Wei1, Rüdiger Berger2

  • 1Leiden Academic Center for Drug Research (LACDR), Leiden University, Einsteinweg 55, Leiden, 2333CC, The Netherlands.

Macromolecular bioscience
|April 22, 2025
PubMed
概括
此摘要是机器生成的。

这项研究引入了由聚烯氧化物合成的新型核心外刷 (CSB),展示了它们作为纳米医学平台的潜力. 这些多功能纳米颗粒有效地封装和释放达沙替尼药物,在质母细胞瘤细胞中显示治疗效果.

关键词:
核心外瓶刷 聚合物 聚合物药物输送是药物输送的过程.聚胺 (Polypeptide) 是一种多胺 (Polypeptide) 的一种化合物.接种-从合成.

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科学领域:

  • 聚合物化学 聚合物化学
  • 纳米技术纳米技术
  • 材料科学 材料科学 材料科学

背景情况:

  • 圆柱形瓶刷聚合物 (CBPs) 通过合成提供可调节的纳米粒子特性.
  • 块共聚合物侧链促进了核心纳米结构的创建.

研究的目的:

  • 通过"从"方法合成基于聚酸的核心外CBPs (CSBs).
  • 评估这些CSB作为药物封装和输送平台的潜力.

主要方法:

  • 合成的核心外刷 (CSBs) 具有聚氨酸 (pLys) 骨干和聚基基胺酸 (pGlu) 块聚氨酸 (pGlu) 侧链.
  • 通过尺寸排除色谱来表征CSB的大小,分子量和分散性.
  • 研究了使用达沙替尼作为模型药物的药物负载,释放动力学,细胞吸收和治疗疗效.

主要成果:

  • 成功合成了可调节的水力动力半径 (17-70 nm) 和高分子量 (1320-4000 kg mol-1) 的CSB.
  • 达沙替尼的负载效率达到了10%,持续释放超过72小时.
  • 已证明细胞吸收到U-87 MG质母细胞细胞和与药物相关的治疗效果.

结论:

  • 基于聚酸的CSB为纳米医学应用提供了一个有前途的平台.
  • 开发的CSB显示了针对药物输送和癌症治疗的潜力.
  • 进一步优化,例如共价药物附着,可以增强药物释放概况.