六价诱导了通过PDK1上调调节的代谢重编程,致癌和瘤进展
Wen-Jing Liu1, Lin Wang2, Fan-Li Sun3
1The Affiliated Cancer Hospital of Zhengzhou University & Henan Cancer Hospital, Zhengzhou, 450008, China.
六价 (Cr(VI)) 暴露会通过抑制miR-493诱导肺癌,导致PDK1和HIF-1α的增加. 这种miR-493/HIF-1α/PDK1通路驱动瘤生长,并与不良的肺癌预后有关.
科学领域:
- 环境健康 环境健康
- 分子生物学分子生物学
- 在瘤学瘤学.
背景情况:
- 肺癌是全球癌症死亡的主要原因之一.
- 六价 (Cr(VI)) 被认为是一种潜在的肺癌原体.
- 了解Cr (VI) 诱导的致癌机制对于开发向疗法至关重要.
研究的目的:
- 阐明Cr(VI) 诱导肺瘤发生和癌症进展的分子机制.
- 确定关键的分子参与者和参与CrVI介导肺癌发展的途径.
- 调查针对已识别的治疗干预途径的潜力.
主要方法:
- 蛋白质基因分析和西式斑点测试,以评估转化细胞中的蛋白质表达.
- 微RNA测序 (miRNA-seq) 用于识别差异表达的微RNA.
- 实体研究评估miR-493过度表达对瘤生长和分子标记物的影响.
- 分子标记水平与患者预后之间的相关性分析.
主要成果:
- (VI) 暴露显著提高了PDK1的表达,促进了细胞迁移,增殖和殖民地形成.
- (VI) 抑制了miR-493水平,这直接针对并降低了PDK1.
- Cr(VI) 也导致了miR-493的下调,随后增加了HIF-1α,这反过来又上调了PDK1.
- 在体内,miR-493的过度表达抑制了瘤生长,PDK1和HIF-1α的表达.
- 抑制的miR-493,升高的HIF-1α和增加的PDK1水平与肺癌预后不佳相关.
结论:
- 通过新的miR-493/HIF-1α/PDK1轴,Cr(VI) 诱导肺癌发生和瘤生长.
- 这一途径代表了Cr (VI) 介导的肺癌发展的重要机制.
- miR-493/HIF-1α/PDK1轴具有作为肺癌预后的生物标志物和治疗点的潜力.
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