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相关概念视频

Site-Targeted Drug Delivery Systems: Polymeric Carriers01:24

Site-Targeted Drug Delivery Systems: Polymeric Carriers

17
Polymeric carriers enhance targeted drug delivery by increasing efficacy while minimizing off-target effects. These carriers comprise a biodegradable polymeric backbone integrated with functional elements that enable targeting, improve physicochemical properties, and regulate drug release.Targeting MechanismsThe targeting ability of polymeric carriers is mediated by a homing device, which is a molecular recognition component designed to selectively bind to specific tissues or cells. Monoclonal...
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Modified-Release Drug Delivery Systems: Overview01:19

Modified-Release Drug Delivery Systems: Overview

17
Modified-release dosage forms are designed to address the limitations of drugs with short biological half-lives. These forms maintain stable therapeutic drug concentrations over extended periods, reducing the need for frequent dosing. A consistent drug level helps minimize peak-trough fluctuations, which can reduce adverse effects, lower the risk of drug resistance, and improve overall treatment effectiveness.One common type of modified-release form is the extended-release (ER) formulation. ER...
17
Drug Delivery: Overview01:16

Drug Delivery: Overview

937
The selection of a drug's delivery route depends upon its physicochemical properties, including lipid or water solubility and ionization, as well as the therapeutic requirement, such as immediate or sustained effect. These routes can be divided into three primary categories: enteral, parenteral, and topical.
Enteral delivery involves administering drugs directly through swallowing, sublingual placement, or buccal application. Orally administered drugs predominantly navigate the...
937
Modified-Release Drug Delivery Systems: Influencing Factors01:20

Modified-Release Drug Delivery Systems: Influencing Factors

20
Modified-release drug delivery systems are designed to optimize the therapeutic effect of drugs by minimizing side effects, reducing the dosage required, and controlling drug release to align with pharmacokinetic and pharmacodynamic needs. The system depends on two key factors: the drug's release from the formulation and its movement through the body to the target site. Unlike conventional dosage forms, where absorption is the limiting step, the rate of drug release is the key determinant in...
20
Modified-Release Drug Delivery Systems: Site-Targeted01:24

Modified-Release Drug Delivery Systems: Site-Targeted

18
Site-targeted drug delivery systems enhance therapeutic efficacy while minimizing systemic toxicity and treatment costs. Unlike conventional methods, these systems ensure precise drug delivery, improving bioavailability and reducing side effects. Targeted drug delivery is classified into three levels. First-order targeting directs drugs to the capillary beds of specific organs or tissues. Second-order targets specific cell types, such as tumor cells, using receptor-mediated interactions.
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Intrauterine Drug Delivery Systems01:21

Intrauterine Drug Delivery Systems

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Controlled-release systems for intravaginal and intrauterine drug delivery have been developed primarily for the administration of contraceptive steroid hormones. These delivery routes circumvent first-pass hepatic metabolism, thereby enhancing bioavailability and allowing for reduced systemic dosages compared to oral administration. Such approaches contribute to improved therapeutic efficacy and patient compliance, particularly in long-term contraceptive regimens.Intravaginal Drug Delivery...
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相关实验视频

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克服登革热疫苗开发中的挑战:先进的发射方法

Anindita Sengupta1,2, Jayanta Bhattacharyya1,2

  • 1Centre for Biomedical Engineering, Indian Institute of Technology, Delhi, New Delhi 110016, India.

Molecular pharmaceutics
|February 16, 2026
PubMed
概括

由于免疫学障碍,开发有效的登革热疫苗具有挑战性. 像先进的抗原设计,纳米粒子传递系统和强大的辅助剂这样的新策略旨在改善疫苗诱导的免疫记忆,以对所有登革热病毒 (DENV) 血清型进行持久的保护.

关键词:
一些TLR激动剂.提供先进的交付系统.没有细胞的疫苗.登革热疫苗 登革热疫苗 登革热疫苗这种水凝是水凝.免疫调节剂 免疫调节剂在模型模型中.纳米颗粒是一种纳米粒子.持续释放 持续释放 持续释放

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科学领域:

  • 免疫学 免疫学 免疫学
  • 疫苗学 疫苗学 疫苗学
  • 生物技术是生物技术.

背景情况:

  • 登革热病毒 (DENV) 是一个严重的全球健康威胁,有四种不同的血清型.
  • 现有的疫苗开发面临诸如抗体依赖增强 (ADE),原始抗原性罪和实现平衡,持久的免疫等障碍.
  • 克服这些免疫障碍对于制造安全有效的登革热疫苗至关重要.

研究的目的:

  • 审查新兴的增强疫苗诱导的免疫记忆的策略,以防止登革热.
  • 探索合理的抗原设计和先进的输送系统,以改善登革热疫苗.
  • 突出解决登革热疫苗开发挑战的创新方法.

主要方法:

  • 对基于纳米粒子的传递系统 (脂质,聚合物,VLP) 的当前研究进行审查.
  • 对可注射水凝,响应性生物材料和有针对性的输送系统的分析.
  • 对强效辅助剂 (TLR激活剂,沙素) 和新型疫苗平台 (mRNA,DNA,EVs) 的评估.
  • 包括用于表位标识和免疫反应模拟的in silico方法.

主要成果:

  • 纳米粒子增强了抗原的稳定性,树突细胞的吸收和淋巴结的输送.
  • 从生物材料中持续释放的抗原促进了生殖中心的形成和记忆B/T细胞反应.
  • 有针对性的输送和强大的辅助剂改善了抗原呈现,并引导了Th1型反应.
  • 像mRNA,DNA和EVs这样的新平台提供了可扩展的免疫激活解决方案.

结论:

  • 抗原设计和输送系统中的新兴策略显示出克服登革热疫苗挑战的希望.
  • 这些方法旨在诱导对所有DENV血清型的强大,平衡和长期免疫力.
  • 集体进展支持开发更安全,更有效的登革热疫苗.