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相关概念视频

Hypoxia01:23

Hypoxia

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Hypoxia is a medical condition characterized by an inadequate oxygen supply to body tissues. It typically manifests as a bluish discoloration of the skin and mucosae, especially in fair-skinned individuals, when hemoglobin (Hb) saturation drops below 75%.
Types of Hypoxia
There are four primary types of hypoxia, each resulting from a different cause:
1. Anemic hypoxia: This type occurs due to insufficient oxygen delivery caused by a lack of red blood cells (RBCs) or RBCs with abnormal or...
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Oxygen Requirements and Growth Patterns01:29

Oxygen Requirements and Growth Patterns

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Microorganisms exhibit diverse oxygen requirements and growth patterns driven by their metabolic strategies and environmental adaptations. Oxygen, while essential for many organisms, can also be toxic under certain conditions, shaping how microorganisms grow and survive.Oxygen Requirements of MicroorganismsMicroorganisms are classified based on their ability to use or tolerate oxygen:Obligate aerobes like Mycobacterium tuberculosis need oxygen for energy production, as it serves as the terminal...
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相关实验视频

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Surface Functionalization of Metal-Organic Frameworks for Improved Moisture Resistance
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Surface Functionalization of Metal-Organic Frameworks for Improved Moisture Resistance

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低氧/ROS/pH三重响应货物释放的金属有机框架

Wenyu Chen1, Huixin He1, Pengfei Jiao1

  • 1School of Pharmacy, Bengbu Medical College, Bengbu, Anhui, 233000, China.

Advanced healthcare materials
|August 17, 2023
PubMed
概括

这项研究引入了用于增强光动力学治疗 (PDT) 的三重响应金属有机框架 (MOF). MOF在需求时释放光敏剂,通过克服反应性氧物种 (ROS) 的限制来提高抗瘤疗效.

科学领域:

  • 生物材料科学 生物材料科学
  • 纳米技术 纳米技术
  • 癌症治疗 癌症治疗

背景情况:

  • 光动力疗法 (PDT) 面临着短时间的活性氧物种 (ROS) 寿命和有限的扩散距离的挑战.
  • 开发有效的药物输送系统对于提高PDT疗效至关重要.

研究的目的:

  • 为触发光敏剂释放设计一个低氧/ROS/pH三重响应的金属有机框架 (MOF).
  • 通过解决ROS扩散和寿命的局限性,提高PDT的抗瘤疗效.

主要方法:

  • 合成了一种以为基础的MOF,与e6 (Ce6) 光敏剂封装在一起,使用含有的伊米达连接剂.
  • 研究了MOF对低氧 (通过阿佐降解),酸性pH (通过伊米达电离) 和ROS (通过伊米达氧化) 的反应.
  • 评估了这些触发剂对光敏剂释放和PDT疗效的协同效应.

主要成果:

  • 亚组在低氧条件下减少了抗氧化剂 (GSH,Trx) 的耗尽,促进了快速的货物释放.
  • 在酸性有机体中的伊米达电离促进了 lysosomal 逃逸和 Ce6 释放.
  • 由ROS诱导的伊米达氧化进一步增强了货物的释放,证明了协同效应.
  • 三重响应系统改善了光敏剂释放率,并增强了PDT治疗.
关键词:
药物输送是药物输送的过程.金属有机框架的框架.光动力学疗法是一种光动力学疗法.

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结论:

  • 三重响应的纳米载体为PDT中触发光敏剂释放提供了一个有希望的策略.
  • 这种方法有效地克服了与抗瘤PDT中ROS相关的局限性.
  • 开发的MOF系统显示了改善癌症治疗结果的潜力.