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不同类型的染色体重组会在前列腺癌中产生瘤性ETS基因融合
Scott A Tomlins1, Bharathi Laxman, Saravana M Dhanasekaran
1Michigan Center for Translational Pathology, Department of Pathology, University of Michigan Medical School, Ann Arbor, Michigan 48109, USA.
研究人员在前列腺癌中发现了新的基因融合,通过基因组重组激活了ETV1瘤基因. 这种ETV1过度表达驱动瘤的发展,并可能影响抗雄激素治疗的有效性.
科学领域:
- 分子瘤学分子瘤学
- 遗传学 是一个遗传学.
- 癌症生物学 癌症生物学
背景情况:
- 涉及TMPRSS2和ETS家族基因 (ERG,ETV1,ETV4) 的复发性基因融合在前列腺癌中很常见.
- 尽管TMPRSS2-ETV1融合较少,但ETV1异常表达背后的机制仍然不清楚.
研究的目的:
- 研究在前列腺瘤和细胞系中驱动异常ETV1表达的机制.
- 了解ETV1位点重组如何促进前列腺癌的发展.
主要方法:
- 在前列腺瘤中确定了ETV1的新型5'融合伙伴.
- 分析了前列腺癌细胞系 (LNCaP,MDA-PCa 2B) 中的ETV1位点重组.
- 在体外和体内总结ETV1过度表达,以评估瘤潜力.
主要成果:
- 发现了ETV1的新聚变合作伙伴,包括SLC45A3,HERV-K_22q11.23,C15orf21和HNRPA2B1.1.
- 在LNCaP和MDA-PCa 2B细胞中确定了ETV1位点的独特基因组重组 (加密插入,平衡转位).
- 证明ETV1过度表达会在良性前列腺细胞和小鼠前列腺中诱导瘤表型.
结论:
- 异常的ETV1过度表达,由各种调节元件的基因组重组驱动,激活前列腺癌中休眠的瘤基因.
- 活跃基因组位点的颠覆是癌瘤发展的潜在通用机制.
- 雄激素不敏感的融合伙伴表明,在晚期前列腺癌中对抗雄激素治疗的含义.
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