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黑色素瘤有不止一个途径吗?
1Division of Dermatology, University of British Columbia Vancouver General Hospital and British Columbia Cancer Agency, Vancouver, Canada. jrivers@interchange.ubc.ca
Lancet (London, England)
|March 10, 2004
概括
阳光暴露通过不同的途径影响黑色素瘤风险. 在间歇性阳光暴露的黑色素瘤中,BRAF突变很常见,但在慢性阳光损伤中很少见,这表明不同的遗传起源.
科学领域:
- 皮肤病学 皮肤病学
- 遗传学 是一个遗传学.
- 流行病学 流行病学
背景情况:
- 阳光是皮肤黑色素瘤的主要原因,强烈的紫外线暴露,特别是在儿童时期,开始恶性转变.
- 矛盾的是,户外工作者表现出较低的黑色素瘤风险,这表明长期暴露在阳光下可能有保护作用,而黑色素瘤可以发生在暴露在阳光下的皮肤和未暴露的皮肤上.
- 黑色素瘤可以从现有的或de novo中发展,这表明黑色素瘤发展涉及的多个途径.
研究的目的:
- 研究BRAF基因突变在侵袭性初级黑色素瘤中的分布.
- 探索BRAF突变状态与阳光照射模式 (间歇性与慢性) 之间的关系.
- 根据阳光照射模式,了解参与黑色素瘤发展的遗传途径.
主要方法:
- 在115名患有侵袭性原发性黑色素瘤的患者中分析了BRAF基因突变.
- 从间歇性暴露于阳光的皮肤与其他皮肤区域的黑色素瘤中BRAF突变频率的统计比较.
- 在长期受到阳光损伤的皮肤中的黑色素瘤中比较BRAF突变频率.
主要成果:
- 在间歇性暴露于阳光的皮肤上的黑色素瘤中,BRAF突变的发生频率明显高.
- 在长期受到阳光损伤的皮肤上的黑色素瘤中,BRAF突变很罕见.
- 这些发现表明,基于日光照射史,黑色素瘤有不同的遗传途径.
结论:
- 黑色素瘤是由多个不同的遗传路径引起的,受阳光照射模式的影响.
- 鉴定BRAF突变模式支持黑色素瘤发展的双通路模型.
- 未来对基因与环境相互作用的研究,如黑色皮质蛋白-1受体多态性,可以进一步阐明这些途径,并为公共卫生战略提供信息.
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