相关实验视频
Updated: Jul 11, 2025
08:35
Inducible and Reversible Dominant-negative DN Protein Inhibition
Published on: January 7, 2019
8.4K
在RB1缺乏和神经内分泌前列腺癌中准DNA甲基化和B7-H3
Yasutaka Yamada1,2, Varadha Balaji Venkadakrishnan1,2, Kei Mizuno1,2
1Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA 02215, USA.
Science translational medicine
|November 15, 2023
概括
异常的DNA甲基化驱动前列腺癌的转变. 通过抑制DNA甲基转移酶 (DNMTs) 减少神经内分泌前列腺癌 (NEPC) 的生长和增加B7-H3表达,使瘤对B7-H3向治疗敏感.
科学领域:
- 在瘤学瘤学.
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 分子生物学分子生物学
背景情况:
- 异常的DNA甲基化在前列腺癌 (PC) 进展中至关重要,特别是在转化为神经内分泌前列腺癌 (NEPC) 的过程中.
- 在NEPC中,DNA甲基转移酶 (DNMT) 被上调和全球失调,这表明它们在驱动谱系可塑性中的作用.
研究的目的:
- 调查针对NEPC和RB1缺陷割耐性前列腺腺癌 (CRPC) 的DNMTs的治疗潜力.
- 在先进前列腺癌的临床前模型中,评估DNMT抑制剂decitabine和DS-7300a (i-DXd),一种针对B7-H3的抗体-药物结合物的疗效.
主要方法:
- 评估了DNMT基因删除对NEPC标记物和瘤发育 in vivo的影响.
- 向缺乏NEPC和RB1的CRPC异种移植模型注射了decitabine.
- 研究了DNMT抑制对B7-H3表达的影响.
- 在先进的前列腺癌模型中测试了DS-7300a作为单一药物和与decitabine结合.
主要成果:
- DNMT基因删除降低了神经内分泌标记物,并减少了NEPC瘤生长和转移.
- 在缺少NEPC和RB1的CRPC模型中,德替丁减弱了瘤生长.
- DNMT抑制通过脱甲基化增加了B7-H3的表达.
- 在高B7-H3的CRPC和NEPC模型中,DS-7300a显示出强大的抗瘤活性.
- 在B7-H3-低的模型中,decitabine和DS-7300a的联合治疗增强了反应.
结论:
- 抑制DNMT是一种有前途的治疗策略,用于NEPC和RB1缺乏的CRPC.
- 通过抑制DNMT,可以通过上调B7-H3表达来使低B7-H3的前列腺癌对DS-7300a敏感.
- 针对缺乏NEPC和RB1的CRPC亚组的生物标志物驱动的治疗策略可能会改善患者的治疗结果.
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
01:20The 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
01:46Epigenetic Regulation
31.1K
Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
31.1K
01:23Negative Regulator Molecules
35.4K
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.
35.4K