通过DNAPKcs调节DNAPKcs增强ETS1稳定性,在三阴性乳腺癌中在化疗抵抗期间调节转录变化
Aiindrila Dhara1,2, Imlimaong Aier3, Souhadri Das1
1Department of Biological Sciences, Bose Institute, Kolkata, West Bengal, India.
NPJ breast cancer
|October 28, 2025
概括
三阴性乳腺癌 (TNBC) 耐药性是由ETS1蛋白稳定性驱动的,由DNAPKcs酸化增强. 用抑制剂向DNAPKcs降解了ETS1,促进了抗性TNBC细胞的亡.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 遗传学 遗传学 是一个
背景情况:
- 三阴性乳腺癌 (TNBC) 由于高化学抵抗率和转移而构成重大临床挑战.
- 虽然ETS1过度表达与TNBC攻击性相关,但其在治疗复发中的确切作用尚不清楚.
研究的目的:
- 阐明ETS1有助于三阴性乳腺癌中获得化学抵抗的机制.
- 研究DNAPKcs在调节ETS1稳定性和药物耐药TNBC中的功能中的作用.
主要方法:
- 使用TNBC细胞系模型获得了对5'-甲和多克索鲁比辛的耐药性.
- 研究了DNAPKcs介导的酸化对ETS1稳定性和降解的影响.
- 对抗性细胞和患者样本进行了转录基因分析.
- 在实验室中评估DNAPKcs抑制剂的疗效.
主要成果:
- 在TNBC模型中,ETS1被确定为获得药物耐药性的关键驱动因素.
- 在Serine 251中通过DNAPKcs介导的ETS1酸化增强了其稳定性,促进了耐药性.
- 化ETS1激活E2F,MYC和G2/M通路,增加DNA合成和扩散.
- DNAPKcs 抑制剂导致ETS1降解,抑制增殖,并在耐药细胞中诱导亡.
- 在耐药性TNBC患者中发现了高S251 ETS1和ETS1驱动的增殖特征.
结论:
- DNAPKcs介导的ETS1酸化是促进TNBC化学抵抗的关键机制.
- 向DNAPKcs酶是一种潜在的治疗策略,可以克服TNBC的耐药性.
- -S251 ETS1 和相关的基因特征可能作为TNBC治疗反应的生物标志物.
相关概念视频
Epigenetic Regulation
3.7K
Epigenetic changes alter the physical structure of the DNA without changing the genetic sequence and often regulate whether genes are turned on or off. This regulation ensures that each cell produces only proteins necessary for its function. For example, proteins that promote bone growth are not produced in muscle cells. Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
X-chromosome...
X-chromosome...
3.7K
Treatment Resistant Cancers
3.7K
Cancer is the second leading cause of death in the United States. A cancer cell is genetically unstable and hence can mutate faster. They can also modify their microenvironment and escape immune surveillance. The difficulties in treating cancer are further compounded by the emergence of rapid resistance to anticancer drugs. The most common ways to attain resistance in cancer cells include alteration in drug transport and metabolism, modification of drug target, elevated DNA damage response, or...
3.7K
Abnormal Proliferation
5.1K
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...
5.1K
Adaptive Mechanisms in Cancer Cells
6.9K
Cancer cells accumulate genetic changes at an abnormally rapid rate due to the defects in the DNA repair mechanisms. From an evolutionary perspective, such genetic instability is advantageous for cancer development. Mutant cell lines accumulate a series of beneficial mutations that contribute to their progression into cancer.
Some of the advantages that cancer cells have on normal cells include - enhanced ability to divide without terminally differentiating, induce new blood vessel formation,...
Some of the advantages that cancer cells have on normal cells include - enhanced ability to divide without terminally differentiating, induce new blood vessel formation,...
6.9K
Targeted Cancer Therapies
8.6K
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...
8.6K


