列纳利多米德会在多发性骨髓瘤细胞中导致IKZF1和IKZF3的选择性降解
Jan Krönke1, Namrata D Udeshi, Anupama Narla
1Brigham and Women's Hospital, Boston, MA 02115, USA.
概括
列纳利多米德通过改变E3无素酶活性来选择性降解淋巴细胞转录因子IKZF1和IKZF3. 这种机制解释了其在多发性骨髓瘤和其他B细胞癌症中的有效性.
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:
- 列纳利多米德是治疗多发性骨髓瘤和B细胞瘤的有效疗法.
- 莱纳利多米德的确切作用机制在很大程度上仍未知.
- 了解lenalidomide的分子点对于优化其临床使用至关重要.
研究的目的:
- 为了阐明lenalidomide的分子作用机制.
- 为了确定lenalidomide的特定蛋白质标.
- 研究莱纳利多米德诱导的蛋白质降解对其治疗效果的作用.
主要方法:
- 使用定量蛋白质组学来识别lenalidomide诱导的蛋白质变化.
- 进行了乌比基化和降解试验,以确认目标接触.
- 用转录因子的基因操纵来评估抵抗机制.
主要成果:
- 列纳利多米德治疗导致了淋巴细胞转录因子IKZF1和IKZF3.3的选择性泛化和降解.
- 这些转录因子对于多发性骨髓瘤细胞的生存和增殖至关重要.
- 在IKZF3的一个特定突变赋予了对莱纳利多米德的耐药性,拯救了细胞生长抑制.
- 消耗IKZF1和IKZF3也导致了T细胞中莱纳利多米德诱导的互白素-2的产生.
结论:
- 莱纳利多米德通过劫持CRBN-CRL4泛素酶复合体来降解IKZF1和IKZF3.
- 这种向蛋白质降解是莱纳利多米德在血液恶性瘤中有效性的关键机制.
- 这些发现揭示了一种新的治疗策略,涉及到调节E3泛素酶以针对蛋白质降解.
相关概念视频
Targeted Cancer Therapies
7.1K
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...
7.1K
Drugs that Destabilize Microtubules
3.2K
Microtubules are dynamic structures and can be regulated by microtubule targeting agents (MTAs). Microtubule destabilizing drugs are a class of MTAs that destabilize and prevent microtubules' polymerization. Both natural and synthetic chemicals can be found under this class of drugs. Vincristine and vinblastine, two vinca alkaloids, and colchicine were among the first to be discovered. These drugs can affect cells in various ways, either by inducing a change in cell morphology, preventing...
3.2K
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
Regulated Protein Degradation
6.6K
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...
6.6K
Abnormal Proliferation
4.0K
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...
4.0K
Destabilization of Microtubules
2.9K
The destabilization of microtubules can occur during different stages of the microtubule lifecycle, such as nucleation or elongation. It can take place at either end of the microtubule or in the microtubule lattices as a whole. The lifespan of individual microtubules within a cell varies according to the cell type and stage of the cell cycle. During interphase, the lifespan of the microtubule is about 30 minutes, while during cell division, it is about 15 minutes. In axonal microtubules of...
2.9K


