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相关概念视频

Differential Relays01:20

Differential Relays

Differential relays are used to protect generators, buses, and transformers by comparing electrical quantities at different points. When a fault occurs, the difference in current between the two points triggers the relay to operate, opening the circuit breaker. Under normal conditions, the current entering (i1) and leaving (i2) a generator are equal. When a fault occurs, however, these currents become unequal, and the difference current flows in the relay operating coil, causing the relay to...

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相关实验视频

Updated: Jun 20, 2026

Sensing of Barrier Tissue Disruption with an Organic Electrochemical Transistor
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开发和描述用于细胞疗法的双层安全开关.

Filippo Rossignoli1,2, Danielle Hoffman1,2, Emaan Atif1,2

  • 1Center for Stem Cell and Translational Immunotherapy (CSTI), Harvard Medical School, Boston, MA, USA.

Cancer biology & therapy
|July 13, 2023
PubMed
概括

用于治疗的工程细胞可以通过一种新的双重自杀系统变得更安全. 该系统使用两个杀死开关,RapaCasp9和HSV-TK,以控制细胞消除并确保治疗安全.

关键词:
不良反应不良反应不良反应细胞治疗疗法细胞治疗疗法临床翻译 临床翻译安全开关的安全开关自杀基因 自杀基因 自杀基因

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科学领域:

  • 生物技术是生物技术.
  • 细胞疗法细胞疗法
  • 癌症研究 癌症研究

背景情况:

  • 基因编辑细胞疗法具有治疗潜力,但由于细胞持久性和毒性,引起了安全问题.
  • 现有的单维自杀系统缺乏对治疗细胞消除的全面控制.

研究的目的:

  • 设计一个强大的双层自杀系统,以提高安全性和控制治疗工程细胞的消除.
  • 在各种细胞类型和临床前模型中验证双杀死开关系统的有效性和可靠性.

主要方法:

  • 工程治疗细胞表达两个不同的自杀基因:RapaCasp9和HSV-TK.
  • 使用特定药物的激活自杀系统:拉帕素用于RapaCasp9和甘西克洛维尔用于HSV-TK.
  • 评估了细胞亡诱导,细胞根除在体外和体内 (皮下和体内模式),以及顺序激活疗效.

主要成果:

  • 无论是RapaCasp9还是HSV-TK,在激活后的不同时间点 (24小时和48小时) 均表现出保存的功能和诱导的亡,没有观察到毒性.
  • 在不同的模型中,在体内实现了治疗细胞的显著根除.
  • 两个自杀开关的顺序激活提供了改进的细胞杀死,建立了一个故障安全机制.

结论:

  • 开发的双重自杀系统为控制工程细胞种群提供了可靠和有效的方法.
  • 这种故障安全机制提高了基于细胞的疗法的安全性,适用于各种细胞类型和解剖位置.