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Maria Anele Romeo¹, Maria Saveria Gilardini Montani¹, Roberta Santarelli¹

¹Department of Experimental Medicine, "Sapienza" University of Rome, Viale Regina Elena 324, 00161, Rome, Italy.

Discover oncology

|August 21, 2023

概括

酸 (VPA) 是一种HDAC抑制剂,通过增强基因转录和蛋白质乙化来增加胰腺癌细胞的PD-L1. 将VPA与像JQ-1这样的BRD4抑制剂结合起来,可能会改善癌症治疗结果.

科学领域:

在瘤学瘤学.
免疫学免疫学免疫学
表观遗传学在表观遗传学中,表观遗传学是指表观遗传学.

背景情况:

编程死亡配体1 (PD-L1) 对于癌细胞来说至关重要,以逃避免疫监测.
表观遗传修饰,包括乙化,影响PD-L1表达和局部化.
基斯脱乙酶 (HDAC) 抑制剂正在研究它们在癌症治疗中的潜力.

研究的目的:

为了研究VPA的作用,一个I/IIa类HDAC抑制剂,在胰腺癌中对PD-L1的表达.
阐明VPA诱导PD-L1上调的基础分子机制.
评估将VPA与BRD4抑制剂结合以增强抗癌效果的潜力.

主要方法:

用VPA和JQ-1 (BRD4抑制剂) 治疗胰腺癌细胞.
对PD-L1表面表达和基因转录的分析.
评估基质子和PD-L1蛋白质的乙化.
研究TRAPPC4相互作用和PD-L1循环的研究.
对联合治疗的细胞毒性进行评估.

主要成果:

在胰腺癌细胞上,VPA显著上调了表面PD-L1表达.
增加PD-L1转录与PD-L1基因的基因乙化相关.
PD-L1蛋白的乙化增强了其与TRAPPC4的相互作用,促进了细胞膜循环.
JQ-1 抵消了VPA诱导的PD-L1转录和表面表达.
组合治疗表明VPA细胞毒性增加.

结论:

在胰腺癌中,VPA通过表观遗传机制促进PD-L1表面表达,包括基因组和蛋白质乙化.
与VPA结合向BRD4可能是一个有希望的策略,以克服免疫逃避并提高治疗疗效.
VPA的作用是特定于PD-L1的,不会影响PD-L2或巨细胞的PD-L1表达.

关键词:

乙化乙化是一种细胞因子 (cytokines) 是一种细胞因子.这就是HDACi.在 JQ-1 中,我们可以使用 JQ-1 .在PD-L1中.胰腺癌是一种胰腺癌.在TRAPPC4上.在VPA中,VPA是VPA.

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