皮质表达在循环瘤细胞中持续存在,因为乳腺癌对抗体药物结合物产生抵抗力
bioRxiv : the preprint server for biology
|April 16, 2025
概括
抗体-药物合物 (ADCs) 在转移性乳腺癌中显示出有效性. 循环瘤细胞 (CTC) 的下降预测了反应,并且表皮质下调并不是TROP2或HER2ADCs的常见抵抗机制.
科学领域:
- 在瘤学瘤学.
- 翻译研究是翻译研究.
- 生物标志物 生物标志物
背景情况:
- 针对TROP2或HER2的抗体药物合物 (ADC) 用于转移性乳腺癌.
- 表位表达在ADC疗效中的作用尚未完全理解.
研究的目的:
- 在接受ADC治疗的患者中研究TROP2和HER2表位表达的临床贡献.
- 评估循环瘤细胞 (CTC) 动态与临床反应之间的关联.
- 为了确定表皮质下调是否驱动对ADCs的获得性耐药性.
主要方法:
- 在接受ADC治疗的33名患者中,使用定量成像对CTC的前性监测.
- 在单个CTC和匹配的瘤活检中分析TROP2和HER2表达异质性.
- CTC数量的变化与临床反应和进展时间的相关性.
主要成果:
- 在CTC上TROP2和HER2的表达是异质的,与最初的临床反应没有很强的相关性.
- 治疗开始后三周内CTC数量下降与TROP2和HER2ADC的持久反应有很强的相关性.
- 在进展过程中,皮层表达 (TROP2/HER2) 不会减少,并且在相同的有效载荷下切换ADC目标显示出有限的有效性.
结论:
- 皮层下调并不是获得对TROP2或HER2ADCs耐药性的主要机制.
- 可能涉及其他抗性机制,需要进一步调查.
- 未来的二线ADC疗法可能会从使用不同的有效载荷而不是针对同一抗原的不同表位受益.
相关概念视频
Treatment Resistant Cancers
3.2K
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...
3.2K
Targeted Cancer Therapies
7.4K
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...
7.4K
Mitogens and the Cell Cycle
6.3K
Mitogens and their receptors play a crucial role in controlling the progression of the cell cycle. However, the loss of mitogenic control over cell division leads to tumor formation. Therefore, mitogens and mitogen receptors play an important role in cancer research. For instance, the epidermal growth factor (EGF) - a type of mitogen and its transmembrane receptor (EGFR), decides the fate of the cell's proliferation. When EGF binds to EGFR, a member of the ErbB family of tyrosine kinase...
6.3K
Tumor Immunotherapy
404
Immunotherapy is a treatment that boosts or manipulates the immune system to fight diseases, including cancer. For instance, by stimulating an immune response through vaccinations against viruses that cause cancers, like hepatitis B virus and human papillomavirus, these diseases can be prevented. Nonetheless, some cancer cells can avoid the immune system due to their rapid mutation and division. The immune response to many cancers involves three phases: elimination, equilibrium, and escape.
404


