甲基腺酸酶 (MTAP) 和p16表达在黑色细胞内和黑色素瘤与分子相关性
Lin J He1, Jason L Hornick2, Eleanor Russell-Goldman2
1Department of Pathology, MD Anderson Cancer Center, Houston, TX; and.
The American Journal of dermatopathology
|September 26, 2025
概括
甲基氨酸酸化酶 (MTAP) 损失是黑色素瘤中CDKN2A缺失的高度特异性标记物,表现优于p16. 失去MTAP也表明MTAP位置的删除,可能指导黑色素瘤中PRMT5抑制剂治疗.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
背景情况:
- 在黑色素瘤中CDKN2A删除是常见的,但p16表达是一个不完美的标记.
- 甲基氨酸酸化酶 (MTAP) 经常与CDKN2A在9p21.3.3处进行编码切除.
- 失去MTAP可以预测对PRMT5抑制剂的反应,这是一个新的治疗标.
研究的目的:
- 评估MTAP在瘤和黑色素瘤中的表达.
- 将MTAP与p16作为CDKN2A删除的替代品进行比较.
- 评估MTAP的实用性作为MTAP局部删除的标记.
主要方法:
- 分析了45种瘤和70种黑色素瘤中的p16和MTAP表达.
- 在63种黑色素瘤中,与CDKN2A和MTAP位置状态相关的表达.
- 利用免疫组织化学和分子分析.
主要成果:
- 在100%的 nevi中保留了MTAP,而p16显示出马赛克 (71%).
- 在黑色素瘤中,59%的人失去了p16,10%的人失去了MTAP.
- MTAP损失显示CDKN2A同异性缺失的特异性为100%,与p16.不同.
结论:
- 在黑色素瘤中,MTAP是 homozygous CDKN2A 缺失的可靠替代标记物.
- MTAP损失与MTAP位元删除有很强的相关性,具有100%的特异性.
- MTAP状态可能会告知黑色素瘤对PRMT5抑制剂的敏感性.
相关概念视频
02:23Abnormal 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
03:03mTOR Signaling and Cancer Progression
4.6K
The mammalian target of rapamycin or mTOR protein was discovered in 1994 due to its direct interaction with rapamycin. The protein gets its name from a yeast homolog called TOR. The mTOR protein complex in mammalian cells plays a major role in balancing anabolic processes such as the synthesis of proteins, lipids, and nucleotides and catabolic processes, such as autophagy in response to environmental cues, such as availability of nutrients and growth factors.
The mTOR pathway or the...
The mTOR pathway or the...
4.6K