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相关概念视频

Regulated Protein Degradation02:58

Regulated Protein Degradation

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It is vital to regulate the activity of enzymatic as well as non-enzymatic proteins inside the cell. This can be achieved either through creating a balance between their rate of synthesis and degradation or regulating the intrinsic activity of the protein. Both these regulation mechanisms play an essential role in the normal functioning of cells.
Protein degradation plays two important roles in the cells. It helps to protect cells from misfolded or damaged proteins before they lead to a...
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The Proteasome01:13

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Eukaryotic cells can degrade proteins through several pathways. One of the most important among these is the ubiquitin-proteasome pathway. It helps the cell eliminate the misfolded, damaged, or unwarranted cytoplasmic proteins in a highly specific manner.
In this pathway, the target proteins are first tagged with small proteins called ubiquitin. This involves participation of a series of enzymes including— E1 (ubiquitin-activating enzyme), E2 (ubiquitin-conjugating enzyme), and E3...
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GPCR Desensitization01:12

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G protein-coupled receptor (GPCR) signaling plays a crucial role in cell functioning. GPCR desensitization is an equally essential process. It allows cells to respond to changing environments and regain sensitivity to new stimuli while preventing unnecessary stimulation when no longer needed. Prolonged exposure to stimuli leads to GPCR desensitization. It involves blocking the receptors from binding and activating additional G proteins. This inhibits activation of downstream effectors, thereby...
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减少激活的CPP-PROTAC纳米复合物通过高效的细胞吸收增强了目标降解

Maho Miyamoto1,2, Kosuke Saito3, Hidetomo Yokoo2

  • 1Graduate School of Medical Life Science, Yokohama City University 1-7-29 Yokohama 230-0045 Japan.

RSC chemical biology
|September 2, 2025
PubMed
概括

我们使用细胞透-PROTAC合物 (MZ1-R9) 和硫酸盐来增强向蛋白质降解. 这种输送系统提高了PROTAC的生物可用性,并克服了细胞膜的挑战.

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科学领域:

  • 生物技术
  • 分子生物学
  • 药物输送系统

背景情况:

  • 有针对性的蛋白质降解是一种有前途的治疗策略.
  • 传统的蛋白质分解向化马体 (PROTACs) 面临着细胞吸收和生物可用性的挑战.
  • 开发有效的输送系统对于PROTAC的有效性至关重要.

研究的目的:

  • 为 PROTACs 开发一个新的纳米粒子传递平台.
  • 使用PROTAC结合剂增强细胞吸收和BRD4降解的效率.
  • 提高PROTAC的生物可用性和克服膜透性的障碍.

主要方法:

  • 通过二硫化物链接剂对细胞透 (R9) 和PROTAC (MZ1) 的结合.
  • 在酸纳米粒子中封装MZ1-R9结合物.
  • 在目标细胞中评估细胞吸收和BRD4降解.

主要成果:

  • 与自由的PROTAC相比,MZ1- R9纳米颗粒的细胞吸收增强.
  • 在纳米颗粒治疗的细胞中观察到显著的BRD4降解.
  • 通过纳米颗粒输送系统,PROTAC的生物可用性和有效性得到了改善.

结论:

  • 开发的纳米粒子平台有效地将PROTACs输入细胞.
  • 这种策略通过克服膜透性问题来增强向蛋白质降解.
  • 基于纳米粒子的MZ1-R9的输送显示了针对蛋白质降解的治疗应用的重大前景.