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Updated: Jan 20, 2026

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通过调节mTOR介导的免疫抑制,SPACA6宿主miR-99b~125a~let-7e集群通过调节mTOR介导的免疫抑制来塑造黑色素瘤耐药性

Viviana Vallacchi¹, Gianpiero Lupoli¹, Eriomina Shahaj¹

¹Translational Immunology, Department of Experimental Oncology, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy.

Frontiers in immunology

|January 19, 2026

概括

miR-99b~125a~let-7e集群通过增加免疫抑制细胞因子和激活mTOR信号来促进黑色素瘤的耐药性. 抑制这种群体可以克服对BRAF/MEK抑制剂的耐药性.

科学领域:

在瘤学瘤学.
分子生物学分子生物学
免疫学免疫学免疫学

背景情况:

黑色素瘤由于基因组,非基因组和免疫变化而表现出对BRAF和MEK抑制剂的耐药性.
对于SPACA6宿主miR-99b~125a~let-7e微RNA集群在治疗耐药性的作用尚不清楚.

研究的目的:

为了研究miR-99b~125a~let-7e集群在黑色素瘤对BRAF/MEK抑制剂耐药性的功能.
探索集群对炎症过程和瘤微环境的影响.

主要方法:

在黑色素瘤患者的瘤和细胞系中分析miRNA表达的分析,治疗反应和耐药性各不相同.
在黑色素瘤细胞中的miR-99b~125a~let-7e集群的抑制和过度表达研究.
在基因目标基因分析和RNA测序 (RNA-seq) 与患者衍生的黑色素瘤扩散物的蛋白质特征分析.

主要成果:

miR-99b,miR-125a和let-7e在进展性瘤和抗性黑色素瘤细胞系中被上调,与免疫抑制性细胞因子增加相关.
集群的联合抑制降低了耐药细胞的增殖和促炎性细胞因子表达 (CCL2,IL6,IL8).
目标基因分析确定了GNAI1,ADCY1和NR6A1参与脂质代谢和mTOR信号传递,在耐药细胞中下调调节. 集群的抑制重新编程了瘤微环境,增强了免疫激活和抑制mTOR信号.

结论:

托管SPACA6的miR-99b~125a~let-7e集群通过促进瘤存活和免疫抑制微环境,促进BRAF/MEK抑制剂耐药性.
针对这种miRNA集群是一个潜在的治疗策略,以克服转移性黑色素瘤中耐药性的治疗.

关键词:

在PDE3D模型中,PDE是3D模型.在SPACA6的空间里.黑色素瘤是一种黑色素瘤.在 miR-99b~125a~let-7e 集群中.电阻的阻力可以

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