胆固醇外流通道阻碍了KRAS驱动的肺瘤原始细胞扩张
Emma Guilbaud1, Thibault Barouillet2, Marius Ilie3
1Institut National de la Santé et de la Recherche Médicale (Inserm) U1065, Université Côte d'Azur, Centre Méditerranéen de Médecine Moléculaire (C3M), Atip-Avenir, Fédération Hospitalo-Universitaire (FHU) OncoAge, 06204 Nice, France; Department of Radiation Oncology, Weill Cornell Medical College, New York, NY, USA.
Cell stem cell
|June 2, 2023
概括
准胆固醇排放通路可以对抗肺癌. 干扰这些前代细胞的途径促进了瘤的生长,但像HDL或胆固醇去除这样的疗法在临床前模型和人类肺腺癌中显示出有前途.
科学领域:
- 在瘤学瘤学.
- 代谢途径 代谢途径
- 癌症生物学 癌症生物学
背景情况:
- 胆固醇外流通路在细胞脂质平衡中至关重要.
- 这些通路的失调与各种疾病有关,包括癌症.
- 癌细胞可以劫持代谢途径以支持其生长和生存.
研究的目的:
- 调查胆固醇流出通道在肺癌发育和进展中的作用.
- 探索针对肺癌中胆固醇排放的治疗潜力.
- 了解胆固醇排放影响瘤微环境的机制.
主要方法:
- 使用KRASG12D小鼠模型的肺腺癌.
- 在上皮原生细胞中破坏胆固醇流出通路.
- 评估了瘤生长,转录景观和瘤微环境.
- 研究了阿波利波蛋白A-I过度表达和循环二烯介导的胆固醇去除的影响.
- 分析了人类肺腺癌 (LUAD) 样本,以检测胆固醇排泄途径的干扰.
主要成果:
- 在上皮原生细胞中破坏胆固醇外流促进了瘤的生长,并创造了一个亲耐受性瘤微环境 (TME).
- 过度表达的阿波利波蛋白A-I (ApoA-I) 和增加的HDL水平保护了瘤的发展.
- 高密度胆固醇 (HDL) 削弱了生长因子信号和癌细胞利用的胆固醇外流之间的反循环.
- 胆固醇去除疗法与环氧二烯减少了瘤负担,通过抑制原始细胞的增殖.
- 在人类的LUAD中观察到胆固醇外流路径的改变.
结论:
- 原始细胞中缺陷的胆固醇排放驱动肺癌的生长和进展.
- 胆固醇外流通道是肺癌治疗的脆弱目标.
- 胆固醇去除疗法作为治疗肺癌的代谢策略具有前途,特别是针对原生细胞.
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