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分泌的Apoe重新连接黑色素瘤细胞状态易受铁灭的脆弱性

Sanket More^1,2, Julie Bonnereau^1,2, David Wouters^3,4,5

¹Cell Death Research and Therapy Laboratory, VIB-KU Leuven Center for Cancer Biology, Leuven, Belgium.

Science advances

|October 16, 2024

概括

黑色素瘤细胞表现出不同的状态,具有不同的代谢特征和ferroptosis脆弱性. 分泌的Apolipoprotein E (APOE) 保护侵袭性黑色素瘤细胞免受铁亡,这表明APOE水平是潜在的生物标志物.

科学领域:

在瘤学瘤学.
细胞生物学细胞生物学
代谢调节代谢调节代谢调节

背景情况:

黑色素瘤异质性是一个治疗挑战,不同的细胞状态表现出不同的代谢概况.
黑色素瘤细胞状态的转变,特别是向入侵的转变,与对受调节细胞死亡途径铁亡的敏感性增加有关.
在不同黑色素瘤细胞状态中控制铁灭敏感性的分子机制在很大程度上仍然未被描述.

研究的目的:

确定不同黑色素瘤细胞表型中铁灭症易感性的关键调节者.
阐明脂质代谢和Apolipoprotein E (APOE) 在黑色素瘤中介 ferroptosis 耐药性的作用.
调查APOE表达作为黑色素瘤患者铁死反应生物标志物的潜力.

主要方法:

在增殖性 (MITFhigh/AXLlow) 和侵袭性 (MITFlow/AXLhigh) 黑色素瘤状态中对脂质代谢基因的比较分析.
在体外和体内实验,以评估Apolipoprotein E (ApoE) 对ferroptosis敏感性的影响.
测量多不和脂肪酸含量和GPX4水平作为对ApoE的反应.
对黑色素瘤患者数据的全外体测序分析,以将APOE表达与铁灭菌耐药性相关联.

主要成果:

鉴定出Apolipoprotein E (APOE) 是最重要的脂质代谢基因,可以区分耐铁灭菌 (增殖性) 和对铁灭菌敏感 (侵入性) 黑色素瘤细胞.
由增殖性黑色素瘤细胞分泌的ApoE通过减少易过氧化多不和脂肪酸并增加GPX4水平,使其对诱导铁亡的药物产生抗性.
在黑色素瘤患者中,高APOE表达与铁灭性耐药性相关,不论生殖线APOE状态如何.

结论:

黑色素瘤中耐铁灭的新机制涉及分泌的ApoE,它调节脂质代谢和GPX4水平.
APOE表达成为预测黑色素瘤对铁灭诱导疗法的不良反应的潜在生物标志物.
了解ApoE介导的铁灭调节为黑色素瘤治疗提供了新的治疗途径.

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