准METTL3作为一个检查点来增强瘤免疫疗法的T细胞
Kaixin Wu1,2,3, Sa Li4,5, Guangliang Hong6
1Center for Cell Lineage and Atlas, Bioland Laboratory, Guangzhou Regenerative Medicine and Health GuangDong Laboratory, Guangzhou, China.
Clinical and translational medicine
|November 21, 2024
概括
向METTL3通过促进T细胞功能和逆转T细胞枯竭来增强抗瘤免疫力. 这种表观遗传方法改善了固体瘤对免疫治疗的反应.
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:
- 固体瘤往往逃避免疫监测,需要新的免疫调节剂来增强免疫治疗的疗效.
- N6-甲基氨酸 (m6A) 涉及到瘤发生,但它在T细胞功能和抗瘤免疫力中的作用在很大程度上尚未探索.
- 研究像m6A这样的表观遗传调节剂对于克服瘤免疫逃避至关重要.
研究的目的:
- 探索RNAm6在调节T细胞功能和抗瘤免疫中的作用.
- 研究抑制METTL3,一个m6甲基转移酶的治疗潜力,以增强抗瘤免疫反应.
- 阐明METTL3抑制影响瘤微环境和T细胞介导死亡的分子机制.
主要方法:
- 用METTL3抑制剂STM2457.7治疗的癌细胞系的RNA测序 (RNA-seq) 进行转录组分析.
- 使用小鼠黑色素瘤和结直肠腺癌模型进行体内研究,以评估METTL3抑制对免疫治疗的影响.
- 单细胞RNA测序 (scRNA-seq) 用于分析瘤微环境动态,以及T细胞细胞毒性测定和CRISPR-Cas9基因编辑用于m6A读者.
主要成果:
- 抑制METTL3增强瘤免疫性,维持T细胞功能,改善对免疫检查点阻塞 (ICB) 治疗的反应性.
- 从机制上讲,METTL3抑制会诱导瘤细胞的干扰素反应,并且通过YTHDF2删除,抑制MHC-I降解,增强抗瘤免疫力.
- 这些效应是免疫依赖的,METTL3抑制促进IFNγ和GzmB的表达,加强T细胞的杀死,并减少T细胞耗尽标志物.
结论:
- 向METTL3通过增加T细胞细胞毒性和逆转T细胞枯竭来增强抗瘤免疫力.
- METTL3充当了表观遗传检查点,其抑制具有强化抗瘤防御和克服免疫抵抗的潜力.
- 抑制METTL3是改善固体瘤免疫治疗结果的有希望的策略.
相关概念视频
Tumor Immunotherapy
480
Immunotherapy is a treatment that boosts or manipulates the immune system to fight diseases, including cancer. For instance, by stimulating an immune response through vaccinations against viruses that cause cancers, like hepatitis B virus and human papillomavirus, these diseases can be prevented. Nonetheless, some cancer cells can avoid the immune system due to their rapid mutation and division. The immune response to many cancers involves three phases: elimination, equilibrium, and escape.
480
The Tumor Microenvironment
6.5K
Every normal cell or tissue is embedded in a complex local environment called stroma, consisting of different cell types, a basal membrane, and blood vessels. As normal cells mutate and develop into cancer cells, their local environment also changes to allow cancer progression. The tumor microenvironment (TME) consists of a complex cellular matrix of stromal cells and the developing tumor. The cross-talk between cancer cells and surrounding stromal cells is critical to disrupt normal tissue...
6.5K
Targeted Cancer Therapies
7.5K
The targeted cancer therapies, also known as “molecular targeted therapies,” take advantage of the molecular and genetic differences between the cancer cells and the normal cells. It needs a thorough understanding of the cancer cells to develop drugs that can target specific molecular aspects that drive the growth, progression, and spread of cancer cells without affecting the growth and survival of other normal cells in the body.
There are several types of targeted therapies against...
There are several types of targeted therapies against...
7.5K


