一个SUMOylation缺陷的MITF生殖基因突变会导致黑色素瘤和癌的发生
Corine Bertolotto1, Fabienne Lesueur, Sandy Giuliano
11] INSERM, U895 (équipe 1), Equipe labélisée Ligue Contre le Cancer, C3M, 06204 Nice, France [2] Université of Nice Sophia-Antipolis, UFR Médecine, 06204 Nice, France [3] Centre Hospitalier Universitaire de Nice, Service de Dermatologie, 06204 Nice, France [4].
Nature
|October 21, 2011
概括
微相关转录因子 (MITF) 基因的基因变异Mi-E318K显著增加患黑色素瘤和细胞癌 (RCC) 的风险. 这一发现表明,这两种癌症具有共同的遗传倾向.
科学领域:
- 遗传学 是一个遗传学.
- 在瘤学瘤学.
- 分子生物学分子生物学
背景情况:
- 没有常见的环境或表型因素将黑色素瘤与细胞癌 (RCC) 联系起来.
- 黑色素瘤的已知风险因素包括阳光照射和色素,而RCC风险包括吸烟和肥胖.
- 在患者中同时发生黑色素瘤和RCC表明了遗传倾向.
研究的目的:
- 调查微眼症相关转录因子 (MITF) 在对同时发生黑色素瘤和RCC的遗传倾向中的作用.
- 在MITF中识别与癌症风险增加相关的特定遗传变异.
主要方法:
- 基因型分析以确定MITF生殖系误解替代.
- 功能性测试,以评估MITF变体对转录和蛋白质相互作用的影响.
- 基因表达造型和基于细胞的测试,以评估瘤发生潜力.
主要成果:
- 在患有黑色素瘤,RCC或两者的患者中,在MITF (Mi-E318K) 中发现了生殖线误解替代的频率更高.
- 携带Mi-E318K的携带者患上这些癌症的风险增加了五倍.
- 突变影响了MITF SUMOylation,增强了MITF与HIF1A促进体的结合,并增加了其转录活性.
- 米-E318K促进了细胞生长,增殖,炎症,克隆性,迁移和入侵.
结论:
- 麻省理工学院的Mi-E318K变种为黑色素瘤和RCC提供了显著的遗传倾向.
- 这种变异影响了MITF在转录和SUMOylation中的作用,导致瘤发生.
- 这些发现提供了关于SUMOylation,转录和癌症发展之间的分子联系的见解.
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