在晚期前列腺癌中,RNASEH2B损失和PARP抑制
Juliet Carmichael1,2, Ines Figueiredo1, Bora Gurel1
1The Institute of Cancer Research, London, United Kingdom.
The Journal of clinical investigation
|June 4, 2024
概括
晚期前列腺癌中RNASEH2B蛋白质的损失使瘤对PARP抑制产生敏感性. 奥拉帕里布治疗消除了RNASEH2B损失的亚克隆,这表明了转移性割抵抗性前列腺癌的新治疗策略.
科学领域:
- 在瘤学瘤学.
- 遗传学 遗传学是一种遗传学.
- 分子生物学分子生物学
背景情况:
- 临床试验表明,Poly (ADP-ribose) 聚合酶 (PARP) 抑制显示出超出同源重组缺陷 (HRD) 的抗瘤活性.
- 独立于HRD的RNASEH2B损失,显示了对瘤对PARP抑制的敏感性临床前有希望.
- 这项研究调查了晚期前列腺癌中RNASEH2B蛋白质损失,与RB1损失的联系,以及其对PARP抑制治疗期间结果的影响.
研究的目的:
- 为了评估晚期前列腺癌中RNASEH2B蛋白质损失.
- 检查RNASEH2B损失,RB1损失和临床结果之间的关联.
- 在PARP抑制治疗期间分析RNASEH2B损失亚克隆的克隆动态.
主要方法:
- 在瘤活检上进行全外体测序 (WES),批量和单核RNA-Seq,以及免疫组织化学 (IHC).
- 对晚期前列腺癌患者队列的分析,包括TOPARP-A和TOPARP-B临床试验中的患者.
- 评估RNASEH2B和RB1蛋白质和mRNA表达,并在olaparib治疗期间进行克隆选择.
主要成果:
- 在染色体13q14的RNASEH2B和RB1的浅码选择是常见的,与减少的mRNA表达有关.
- 虽然mRNA表达是相关的,但单核RNA-Seq揭示了RNASEH2B和RB1.1.的不一致蛋白质损失.
- 奥拉帕里布治疗在BRCA1/2野生型转移性割耐性前列腺癌 (mCRPC) 中消除了RNASEH2B损失瘤亚克隆.
结论:
- 通过向和消除RNASEH2B损失瘤亚克隆,PARP抑制可能为mCRPC患者提供治疗效益.
- RNASEH2B损失代表了前列腺癌中PARP抑制剂反应的潜在预测生物标志物.
- 进一步研究RNASEH2B在前列腺癌进展和治疗反应中的作用是有必要的.
相关概念视频
02:23Abnormal Proliferation
4.5K
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...
4.5K
01:02Long-patch Base Excision Repair
7.0K
Since the discovery of the two BER pathways, there has been a debate about how a cell chooses one pathway over the other and the factors determining this selection. Numerous in vitro experiments have pointed out multiple determinants for the sub-pathway selection. These are:
7.0K
01:08Nucleotide Excision Repair
37.0K
Overview
37.0K
01:23Negative Regulator Molecules
35.3K
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.
35.3K
01:20The 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