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长读序列检测揭示了替代分离驱动的共享免疫原性新表位,无论SF3B1状态在Uveal黑色素瘤中如何

Tengteng Yao^1,2, Zhe Zhang^1,2,3, Qian Li^1,2,3

¹Department of Ophthalmology, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.

Cancer immunology research

|September 27, 2023

概括

研究人员鉴定出新的瘤新表位从膜黑色素瘤的替代拼接,独立于SF3B1突变. 这些新型细胞因刺激T细胞反应而显示出有效的癌症免疫疗法的潜力.

科学领域:

在瘤学瘤学.
免疫学免疫学免疫学
基因组学就是基因组学.

背景情况:

瘤特异性新皮托普是癌症免疫治疗的关键点.
替代拼接 (AS) 提供了丰富的新表位源,特别是在具有低单核酸变异 (SNVs) 的癌症中,如皮膜黑色素瘤 (UM).
目前对UM新表位体的研究往往集中在3b分单元1 (SF3B1) 突变的剪接因子上,这在了解SF3B1独立的新表位体上留下了空白.

研究的目的:

为了确定UM中常见于患者的替代拼接衍生新表位,无论SF3B1突变状态如何.
通过使用先进的测序技术,探索UM中AS和新型异型的风景.
验证和描述潜在的新表位体,并评估它们在UM中的治疗潜力.

主要方法:

利用纳米孔长读序列来全面分析UM的替代拼接格局.
采用高分辨率质谱测量来验证新位候选物.
应用AlphaFold2用于新表位细胞的结构分析和对其抗瘤作用的实验性评估,包括干扰素 (IFNγ) 生产和T细胞激活.

主要成果:

在UM中确定了一组新型的AS衍生新表位组,独立于SF3B1状态.
验证了这些新位候选物的存在和结构.
证明这些新表位物诱导显著的抗瘤免疫反应,包括IFNγ产生和T细胞介导的瘤杀死.

结论:

在UM中发现了可操作的,SF3B1独立的新表位素,这些新表位素来自替代拼接.
这些发现为开发UM的新型新位向免疫疗法提供了基础.
这项研究强调了针对有限的SNVs的癌症中AS衍生的新表位的治疗潜力.

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