通过非传统的联合激活剂结合位点 (CBS) 来向降解雌激素受体α
Yubo Wang1, Baohua Xie1, Xiaofei Deng1
1Department of Hematology, Zhongnan Hospital of Wuhan University, School of Pharmaceutical Sciences, Wuhan University, Wuhan 430071, China.
Journal of medicinal chemistry
|June 17, 2025
概括
研究人员开发了针对雌激素受体α (ERα) 的新型PROTAC,以对抗ERα阳性乳腺癌中的内分泌抵抗. 化合物CP03有效降解ERα并抑制癌细胞生长,为新的治疗策略显示出希望.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 药物发现 药物发现 药物发现
背景情况:
- 雌激素受体α (ERα) 信号传递是ERα阳性乳腺癌 (ERα+BC) 治疗的关键目标.
- 对内分泌疗法的内在和获得性耐药性是一个重大的临床挑战.
- 准ERα联合激活剂结合部位 (CBS) 为克服与连接体结合域 (LBD) 突变相关的抗性机制提供了一个替代方案.
研究的目的:
- 开发针对ERα的非传统的协作激活剂结合部位 (CBS) 的新型蛋白质溶解向基因组 (PROTACs).
- 评估这些PROTACs在降解ERα和抑制ERα+BC模型中的扩散中的有效性.
- 评估CP03在克服内分泌抵抗方面的治疗潜力.
主要方法:
- 设计和合成针对ERα CBS的第一类PROTACs.
- 在实验室评估ERα降解和ERα+BC细胞系 (野生型和突变ERα) 的抗增殖活性.
- 在异种移植小鼠模型 (MCF-7和耐药LCC-2) 中对抗瘤和ERα降解活性的体内评估.
主要成果:
- CP03显示了ERα的强大和选择性降解.
- CP03在各种ERα+BC细胞系中表现出显著的抗增殖作用.
- 在敏感和耐药异种移植模型中,CP03在体内表现出卓越的抗瘤活性和ERα降解.
结论:
- CP03代表了一种基于PROTAC的新策略,用于ERα降解.
- 这种方法有望克服ERα+BC中的内分泌抵抗.
- CP03为ERα+乳腺癌患者提供了新的治疗机会,特别是那些对传统疗法的耐药性患者.
更多相关视频
相关概念视频
Receptor Downregulation in MVBs
2.2K
Multivesicular bodies (MVBs) are mature endosomes that sort ubiquitinated proteins and then fuse with lysosomes to degrade the sorted proteins. Epidermal growth factor (EGF) and its receptor (EGFR) form a complex that can be internalized through endocytosis, sorted into an MVB, and later degraded.
The EGFR can initiate signaling pathways that lead to cell proliferation, migration, and differentiation. Overexpression of EGFR stimulates cells to proliferate. Excessive EGFR...
The EGFR can initiate signaling pathways that lead to cell proliferation, migration, and differentiation. Overexpression of EGFR stimulates cells to proliferate. Excessive EGFR...
2.2K
Regulated Protein Degradation
7.7K
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...
7.7K
Transducer Mechanism: Nuclear Receptors
1.7K
Nuclear receptors, or NRs, are unique transcription factors that regulate gene transcription and affect the cellular pathways involved in reproduction, development, or metabolism. Their ability to be stimulated by small lipophilic ligands and control vital cellular processes makes them ideal drug targets. Nearly 10-15% of currently prescribed drugs target these receptors.
About 48 different soluble family members of nuclear receptors are identified that can be divided into two main classes:
About 48 different soluble family members of nuclear receptors are identified that can be divided into two main classes:
1.7K
Export of Misfolded Proteins out of the ER
3.9K
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...
3.9K
The Unfolded Protein Response
5.1K
The ER is the hub of protein synthesis in a cell. It has robust systems to quality control protein folding and also for degradation of terminally misfolded proteins. Under normal conditions, a small proportion of misfolded proteins that cannot be salvaged need to be transported to the cytoplasm by the ER-associated degradation or ERAD pathways. However, if the ERAD cannot handle the misfolded proteins, the cell activates the unfolded protein response or UPR to adjust the protein folding...
5.1K
Covalently Linked Protein Regulators
7.5K
Proteins can undergo many types of post-translational modifications, often in response to changes in their environment. These modifications play an important role in the function and stability of these proteins. Covalently linked molecules include functional groups, such as methyl, acetyl, and phosphate groups, and also small proteins, such as ubiquitin. There are around 200 different types of covalent regulators that have been identified.
These groups modify specific amino acids in a protein....
These groups modify specific amino acids in a protein....
7.5K


