针对VISTA的向破坏可以增强抗瘤免疫疗法
Li Chen1, Xia Bu2, Yishuang Sun3
1Department of Pathology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA.
Cell research
|November 12, 2025
概括
研究人员发现了一种针对癌症免疫治疗的V-域Ig抑制T细胞激活 (VISTA) 的新方法. 抑制USP2降低VISTA,促进T细胞反应,并改善抗PD-1治疗的生存率.
科学领域:
- 免疫学 免疫学 免疫学
- 癌症生物学 癌症生物学
- 分子生物学分子生物学
背景情况:
- 免疫检查点调节免疫反应,是癌症治疗的关键目标.
- 目前的免疫疗法面临耐药性和有限的疗效,需要新的策略.
- T细胞激活的V域Ig抑制剂 (VISTA) 是抗瘤免疫疗法的新型免疫检查点标.
研究的目的:
- 确定癌症免疫治疗的新型治疗点和策略.
- 阐明VISTA在瘤细胞中的调节机制.
- 调查针对VISTA稳定性的治疗潜力.
主要方法:
- 调查了VISTA的泛基化和蛋白质体降解,其媒介是阿纳相促进复合物/环体 (APC/C) /CDH1.1.
- 利用二基酶USP2来逆转VISTA的降解.
- 在体外和体内使用USP2抑制剂MS102.
- 在与抗PD-1免疫疗法相结合的同基因小鼠瘤模型中评估了T细胞反应和存活率.
主要成果:
- 维斯塔蛋白经历APC/C/CDH1介导的泛化和蛋白质体降解.
- USP2二基因酶活性稳定了VISTA.
- USP2 抑制剂 MS102 降低了 VISTA 蛋白质水平,并增强了 T 细胞的反应.
- MS102与抗PD-1免疫疗法协同作用,改善了小鼠瘤模型中的生存率.
结论:
- 已经确定了涉及USP2的VISTA稳定性的新型监管网络.
- 通过USP2抑制准VISTA稳定性为癌症免疫治疗提供了一个有希望的策略.
- 将USP2抑制剂与抗PD-1免疫疗法结合起来,可以增强抗瘤免疫反应和治疗结果.
相关概念视频
Tumor Immunotherapy
1.7K
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.
1.7K
Targeted Cancer Therapies
8.6K
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...
8.6K
Cancer Vaccines
939
Cancer treatment vaccines are a rapidly evolving field that offers a promising approach to immunotherapy. Unlike traditional vaccines that prevent diseases, cancer treatment vaccines are designed to treat existing cancers by stimulating the immune system to recognize and attack cancer cells.
Cancer vaccines come in two categories: preventive (prophylactic) and treatment (active). Preventive vaccines, such as the Human Papillomavirus (HPV) vaccine, protect against viruses that cause certain...
Cancer vaccines come in two categories: preventive (prophylactic) and treatment (active). Preventive vaccines, such as the Human Papillomavirus (HPV) vaccine, protect against viruses that cause certain...
939
Cancer Therapies
9.8K
Cancer therapies are various modes of treatment, such as surgery, radiation therapy, and chemotherapy that are administered to cancer patients.
However, cancer treatments can pose several challenges, as therapies used to kill cancer cells are generally also toxic to normal cells. Moreover, cancer cells mutate rapidly and can develop resistance to chemical agents or radiation therapy. Besides, all types of cancer cells may not respond to the same therapy. Some cancer cells respond to one...
However, cancer treatments can pose several challenges, as therapies used to kill cancer cells are generally also toxic to normal cells. Moreover, cancer cells mutate rapidly and can develop resistance to chemical agents or radiation therapy. Besides, all types of cancer cells may not respond to the same therapy. Some cancer cells respond to one...
9.8K
Treatment Resistant Cancers
3.7K
Cancer is the second leading cause of death in the United States. A cancer cell is genetically unstable and hence can mutate faster. They can also modify their microenvironment and escape immune surveillance. The difficulties in treating cancer are further compounded by the emergence of rapid resistance to anticancer drugs. The most common ways to attain resistance in cancer cells include alteration in drug transport and metabolism, modification of drug target, elevated DNA damage response, or...
3.7K
Tumor Progression
7.2K
Tumor progression is a phenomenon where the pre-formed tumor acquires successive mutations to become clinically more aggressive and malignant. In the 1950s, Foulds first described the stepwise progression of cancer cells through successive stages.
Colon cancer is one of the best-documented examples of tumor progression. Early mutation in the APC gene in colon cells causes a small growth on the colon wall called a polyp. With time, this polyp grows into a benign, pre-cancerous tumor. Further...
Colon cancer is one of the best-documented examples of tumor progression. Early mutation in the APC gene in colon cells causes a small growth on the colon wall called a polyp. With time, this polyp grows into a benign, pre-cancerous tumor. Further...
7.2K


