素素和ATF3在状皮肤癌中的对立作用
Xunwei Wu1, Bach-Cuc Nguyen, Piotr Dziunycz
1Cutaneous Biology Research Center, Massachusetts General Hospital, Charlestown, MA 02129, USA.
Nature
|May 21, 2010
概括
氨酸抑制剂增加了状细胞癌 (SCC) 的风险. 抑制氨酸/NFAT信号促进皮肤瘤的形成,通过抑制p53-依赖的衰老,ATF3发挥关键作用.
科学领域:
- 免疫学 免疫学 免疫学
- 皮肤病学 皮肤病学
- 在瘤学瘤学.
背景情况:
- 氨酸抑制剂 (例如,环素A) 是器官移植接受者的重要免疫抑制剂.
- 这些药物显著增加了状细胞癌 (SCC) 的风险,但对基底细胞癌 (BCC),黑色素瘤和内部恶性瘤的影响较小.
研究的目的:
- 研究激活T细胞 (NFAT) 信号传导中的氨尿素/核因子在皮肤癌发展中的作用.
- 阐明氨酸/NFAT抑制有助于瘤发生的机制.
主要方法:
- 使用了小鼠皮肤模型和异种移植,其中含有表达H-ras(V12) 基氨酸细胞或SCC细胞.
- 采用遗传学和药理学方法来抑制氨尿素/NFAT功能.
- 分析了对p53依赖的癌细胞衰老和ATF3表达的影响.
主要成果:
- 抑制氨酸/NFAT信号传递促进了小鼠皮肤和异种移植中的瘤形成.
- 氨酸/NFAT抑制抵消了p53依赖的癌细胞衰老,增强了瘤发生潜力.
- 通过氨酸/NFAT抑制选择性诱导ATF3,并通过中介抑制衰老和增加瘤发生.
结论:
- 完整的氨酸/NFAT信号传输对于p53和老化介导的皮肤SCC的保护至关重要.
- 氨酸/NFAT通路的抑制是驱动免疫抑制个体SCC发展的关键机制.
- 向ATF3或恢复氨酸/NFAT活性可能为预防SCC提供治疗策略.
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