针对膜蛋白的有针对性的降解的GPC3介导的溶酶体向化实体 (GLTACs)
Yuxin Fang1, Yaojin Zhu2, Wei Wang1
1Center for Basic Research and Innovation of Medicine and Pharmacy (MOE), School of Pharmacy, Second Military Medical University (Naval Medical University), Shanghai 200433, China.
Acta pharmaceutica Sinica. B
|June 9, 2025
概括
我们开发了 glypican-3 (GPC3) 介导的 lysosome-targeting chimeras (GLTACs) 来降解瘤膜蛋白质. GLTACs通过降解PD-L1.1等蛋白质,显示出向癌症治疗的潜力.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 在瘤学瘤学.
背景情况:
- 膜蛋白降解是向蛋白降解 (TPD) 的一个关键领域.
- 瘤特异性膜蛋白是具有挑战性的治疗点.
- 格利皮坎-3 (GPC3) 在某些瘤中表达高,并促进内细胞分裂.
研究的目的:
- 开发一种新的TPD策略,使用GPC3.3针对瘤特异性膜蛋白.
- 为了创建 glypican-3 (GPC3) 介导的 lysosome-targeting 嵌合体 (GLTACs),用于针对性的蛋白质降解.
- 根据验证的目标评估GLTACs的疗效和特异性.
主要方法:
- 一个针对GPC3的和一个感兴趣的蛋白质 (POI) 配体的结合,形成GLTACs.
- 利用GPC3的瘤特异性表达和内细胞分裂来进行有针对性的内化.
- 设计GLTACs来降解PD-L1,c-Met和FGFR1. 这是一个很好的方法.
- 评估GLTAC WP0对PD-L1降解和T细胞介导的瘤杀伤在HepG2细胞中的作用.
主要成果:
- GLTACs成功诱导了膜蛋白的向降解.
- GLTAC WP0在HepG2细胞中显示了PD-L1的强烈降解.
- 通过GLTAC WP0降解PD-L1导致增强的T细胞介导的瘤细胞杀死.
结论:
- GLTAC技术提供了一种通过GPC3介导的溶酶体降解来向膜蛋白的新方法.
- 这一战略扩大了TPD对挑战癌症目标的能力.
- GLTACs在癌症治疗中具有显著的治疗潜力.
相关概念视频
Export of Misfolded Proteins out of the ER
3.5K
After folding, the ER assesses the quality of secretory and membrane proteins. The correctly folded proteins are cleared by the calnexin cycle for transport to their final destination, while misfolded proteins are held back in the ER lumen. The ER chaperones attempt to unfold and refold the misfolded proteins but sometimes fail to achieve the correct native conformation. Such terminally misfolded proteins are then exported to the cytosol by ER-associated degradation or ERAD pathway for...
3.5K
GPI Anchoring of Proteins in the ER Membrane
4.0K
GPI-anchoring is a post-translational, reversible protein modification that is ubiquitous in eukaryotes. Such proteins are primarily present on the exoplasmic leaflet of the plasma membrane.
GPI-anchor structure
A sequence of 11 enzymatic reactions results in the synthesis of the complete GPI anchor consisting of a hydrophobic and a hydrophilic portion. The hydrophobic portion comprises phosphatidylinositol, while the hydrophilic part comprises polar groups like phosphoethanolamine,...
GPI-anchor structure
A sequence of 11 enzymatic reactions results in the synthesis of the complete GPI anchor consisting of a hydrophobic and a hydrophilic portion. The hydrophobic portion comprises phosphatidylinositol, while the hydrophilic part comprises polar groups like phosphoethanolamine,...
4.0K
GPCR Desensitization
5.9K
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...
5.9K
Rab Proteins
3.9K
Rab proteins constitute the largest family of monomeric GTPases, of which 70 members are present in humans. Rab proteins and their effectors regulate consecutive stages of vesicle transport such as vesicle transport, docking, and fusion to the correct recipient membrane.
Rab proteins switch between a cytosolic, GDP-bound inactive state and a membrane-anchored, GTP-bound active state. By themselves, Rabs show slow rates of GDP/GTP exchange and GTP hydrolysis. Thus, Rab proteins are considered...
Rab proteins switch between a cytosolic, GDP-bound inactive state and a membrane-anchored, GTP-bound active state. By themselves, Rabs show slow rates of GDP/GTP exchange and GTP hydrolysis. Thus, Rab proteins are considered...
3.9K
Delivery Pathways to the Lysosome
6.2K
Eukaryotic cells use different mechanisms to eliminate toxic waste obsolete and worn-out substances. Lysosomes play a pivotal role in this, and hence, these substances are carried to the lysosome from other parts of the cell and extracellular space through different pathways. The most elaborately studied pathways to the lysosome are the endocytic pathways.
Endocytosis
In endocytosis, the cell membrane takes up macromolecules and particles from the surrounding medium. Clathrin-mediated...
Endocytosis
In endocytosis, the cell membrane takes up macromolecules and particles from the surrounding medium. Clathrin-mediated...
6.2K
Regulated Protein Degradation
7.2K
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...
Protein degradation plays two important roles in the cells. It helps to protect cells from misfolded or damaged proteins before they lead to a...
7.2K


