不匹配修复缺陷预测了固体瘤对PD-1封锁的反应
Dung T Le1,2,3, Jennifer N Durham1,2,3, Kellie N Smith1,3
1Bloomberg-Kimmel Institute for Cancer Immunotherapy at Johns Hopkins, Baltimore, MD 21287, USA.
概括
具有许多突变的不匹配修复缺陷癌症对编程死亡受体-1 (PD-1) 阻断的反应率很高. 这种免疫治疗方法在各种癌症中有效,为患者提供持久的益处.
科学领域:
- 癌症学
- 免疫学
- 遗传学
背景情况:
- 具有不匹配修复缺陷的癌症具有较高的突变负担.
- 之前的研究表明不匹配修复缺陷的结肠直肠癌对PD-1阻塞的敏感性.
研究的目的:
- 在不同类型的癌症中评估编程死亡受体-1 (PD-1) 阻断的疗效.
主要方法:
- 扩大了PD-1阻断功效的概念验证研究.
- 包括12种瘤类型的晚期不匹配修复缺陷癌症患者.
- 评估了放射反应,无进展的存活率和整体存活率.
主要成果:
- 在53%的患者中观察到客观的放射性反应.
- 在21%的患者中获得完整的反应.
- 反应是持久的,中位数没有进展,整体存活率没有达到.
结论:
- 不匹配修复缺陷的癌症对PD-1阻塞很敏感,不论瘤的起源如何.
- 在这些癌症中,高新抗原负载可能会导致对免疫检查点阻塞的敏感性.
- 对于不匹配修复缺陷的癌症,PD-1阻塞是一种有前途的治疗策略.
相关概念视频
Mismatch Repair
6.8K
Organisms are capable of detecting and fixing nucleotide mismatches that occur during DNA replication. This sophisticated process requires identifying the new strand and replacing the erroneous bases with correct nucleotides. Mismatch repair is coordinated by many proteins in both prokaryotes and eukaryotes.
The Mutator Protein Family Plays a Key Role in DNA Mismatch Repair
The human genome has more than 3 billion base pairs of DNA per cell. Prior to cell division, that vast amount of genetic...
The Mutator Protein Family Plays a Key Role in DNA Mismatch Repair
The human genome has more than 3 billion base pairs of DNA per cell. Prior to cell division, that vast amount of genetic...
6.8K
Mismatch Repair
44.1K
Overview
44.1K
Abnormal Proliferation
5.3K
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...
5.3K
DNA Damage can Stall the Cell Cycle
10.3K
In response to DNA damage, cells can pause the cell cycle to assess and repair the breaks. However, the cell must check the DNA at certain critical stages during the cell cycle. If the cell cycle pauses before DNA replication, the cells will contain twice the amount of DNA. On the other hand, if cells arrest after DNA replication but before mitosis, they will contain four times the normal amount of DNA. With a host of specialized proteins at their disposal,cells must use the right protein at...
10.3K
DNA Damage Can Stall the Cell Cycle
3.3K
In response to DNA damage, cells can pause the cell cycle to assess and repair the breaks. However, the cell must check the DNA at certain critical stages during the cell cycle. If the cell cycle pauses before DNA replication, the cells will contain twice the amount of DNA. On the other hand, if cells arrest after DNA replication but before mitosis, they will contain four times the normal amount of DNA. With a host of specialized proteins at their disposal,cells must use the right protein at...
3.3K


