选择性降解BRD4抑制肺癌细胞增殖使用GSH响应的PROTAC前体
Heli Fan1, Zhili Zhou2, Dehao Yu1
1Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics, School of Pharmacy, Department of Nuclear Medicine, Tianjin Medical University General Hospital, Tianjin Medical University, Tianjin 300070, PR China.
Bioorganic chemistry
|September 8, 2023
概括
研究人员开发了新的对谷氨反应的蛋白解向化体 (PROTACs),以选择性地降解癌细胞中的BRD4. 这种方法尽量减少对正常细胞的毒性,增强向癌症治疗的临床潜力.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 药用化学 医学化学
背景情况:
- BRD4是癌症发展的关键调节剂,但传统的抑制剂会产生不良影响.
- 化向化体 (PROTACs) 通过降解向蛋白质,为癌症治疗提供了一个有希望的策略.
- 现有的PROTACs往往缺乏癌症特异性,导致正常细胞的毒性.
研究的目的:
- 设计和合成针对BRD4降解的新型谷氨 (GSH) 敏感的PROTAC前体.
- 通过利用癌细胞中更高的GSH水平来提高PROTACs的选择性.
- 为了减少基于PROTAC的癌症治疗的非目标和不良影响.
主要方法:
- 通过修改VHL连接体来开发GSH响应的PROTAC前体 (1a-c).
- 在肺癌细胞 (A549,H1299) 和正常肺细胞 (WI38,HULEC-5a) 中激活PROTAC前体.
- 评估BRD4降解,细胞毒性和机制性调查.
主要成果:
- 在肺癌细胞中,高水平的GSH有效激活了PROTAC前体1a,导致BRD4降解和细胞毒性.
- 在较低GSH水平的正常肺细胞中,PROTAC前体1a显示出有限的激活,减少了不良影响.
- 机理学研究证实了细胞内BRD4.4的向降解.
结论:
- 响应谷氨的PROTAC前体为选择性癌症治疗提供了一个有希望的策略.
- 这种方法增强了PROTAC的选择性,并最大限度地降低了对正常组织的毒性.
- 开发的PROTAC显示了针对性癌症治疗的显著临床潜力.
相关概念视频
The Retinoblastoma Gene
4.1K
Tumor suppressor genes are normal genes that can slow down cell division, repair DNA mistakes, or program the cells for apoptosis in case of irreparable damage. Hence, they play an essential role in preventing the proliferation of damaged cells.
The first-ever tumor suppressor gene called Rb was identified in retinoblastoma - a rare eye tumor in children. In inherited forms of the disease, a child inherits one defective copy of the Rb gene, which predisposes them to retinoblastoma. However,...
The first-ever tumor suppressor gene called Rb was identified in retinoblastoma - a rare eye tumor in children. In inherited forms of the disease, a child inherits one defective copy of the Rb gene, which predisposes them to retinoblastoma. However,...
4.1K
Targeted Cancer Therapies
7.7K
The targeted cancer therapies, also known as “molecular targeted therapies,” take advantage of the molecular and genetic differences between the cancer cells and the normal cells. It needs a thorough understanding of the cancer cells to develop drugs that can target specific molecular aspects that drive the growth, progression, and spread of cancer cells without affecting the growth and survival of other normal cells in the body.
There are several types of targeted therapies against...
There are several types of targeted therapies against...
7.7K
Abnormal Proliferation
4.6K
Under normal conditions, most adult cells remain in a non-proliferative state unless stimulated by internal or external factors to replace lost cells. Abnormal cell proliferation is a condition in which the cell's growth exceeds and is uncoordinated with normal cells. In such situations, cell division persists in the same excessive manner even after cessation of the stimuli, leading to persistent tumors. The tumor arises from the damaged cells that replicate to pass the damage to the...
4.6K
Negative Regulator Molecules
35.4K
Positive regulators allow a cell to advance through cell cycle checkpoints. Negative regulators have an equally important role as they terminate a cell’s progression through the cell cycle—or pause it—until the cell meets specific criteria.
35.4K
Inhibition of Cdk Activity
4.8K
The orderly progression of the cell cycle depends on the activation of Cdk protein by binding to its cyclin partner. However, the cell cycle must be restricted when undergoing abnormal changes. Most cancers correlate to the deregulated cell cycle, and since Cdks are a central component of the cell cycle, Cdk inhibitors are extensively studied to develop anticancer agents. For instance, cyclin D associates with several Cdks, such as Cdk 4/6, to form an active complex. The cyclin D-Cdk4/6 complex...
4.8K
Loss of Tumor Suppressor Gene Functions
4.9K
Tumor suppressor genes are normal genes that can slow down cell division, repair DNA mistakes, or program the cells for apoptosis in case of irreparable damage. Hence, they play an essential role in preventing the proliferation of damaged cells.
When the tumor suppressor genes develop mutations or are lost, cells start growing out of control, leading to cancer. However, a single functional copy of the tumor suppressor gene is enough for the cells to maintain their normal functions and cell...
When the tumor suppressor genes develop mutations or are lost, cells start growing out of control, leading to cancer. However, a single functional copy of the tumor suppressor gene is enough for the cells to maintain their normal functions and cell...
4.9K


