通过调节胆固醇代谢来增强CD8 ((+) T细胞的抗瘤反应
Wei Yang1, Yibing Bai1, Ying Xiong2
1State Key Laboratory of Molecular Biology, National Center for Protein Science Shanghai, Shanghai Science Research Center, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China.
Nature
|March 17, 2016
概括
抑制CD8 ((+) T细胞中的胆固醇化增强了它们的抗癌活性. 通过使用ACAT1抑制的方法, 通过促进T细胞对抗瘤的功能, 显示出癌症免疫疗法的前景.
科学领域:
- 免疫学
- 癌症生物学
- 代谢途径
背景情况:
- CD8 ((+) T细胞对于抗瘤免疫至关重要,但在瘤微环境中经常被抑制.
- 重新激活CD8 ((+) T细胞的细胞毒性是癌症免疫疗法的关键目标.
研究的目的:
- 通过调节胆固醇代谢,研究一种增强CD8T细胞抗瘤反应的新机制.
- 评估针对T细胞胆固醇化治疗的治疗潜力.
主要方法:
- 在小鼠CD8 ((+) T细胞中对ACAT1 (胆固醇化酶) 的基因切除和药理抑制.
- 评估T细胞效应器功能,增殖和免疫突触形成.
- 使用黑色素瘤模型的体内研究来评估单独和与抗PD-1抗体结合的ACAT1抑制和阿瓦西米布治疗的抗瘤疗效.
主要成果:
- 通过增加血胆固醇,抑制ACAT1增强了CD8 ((+) T细胞效应器功能和增殖,从而改善了T细胞受体聚合和信号传递.
- 在小鼠中,缺少ACAT1的CD8 ((+) T细胞对黑色素瘤生长和转移有较强的控制.
- 在黑色素瘤模型中,ACAT抑制剂阿瓦西米布表现出显著的抗瘤作用,与抗PD-1抗体的联合治疗提高了疗效.
结论:
- 调节胆固醇代谢,特别是通过抑制ACAT1, 是一种可行的策略,以增强CD8T细胞介导的抗瘤免疫力.
- ACAT1被确定为癌症免疫治疗的潜在治疗点,而阿瓦西米布作为治疗剂具有前景.
- 联合抑制ACAT1和PD-1阻断为增强抗瘤反应提供了一种协同方法.
相关概念视频
Cholesterol: Significance and Regulation
1.9K
Although not a source of energy, cholesterol plays a significant role as a foundational structure for bile salts, steroid hormones, and vitamin D, as well as being a crucial component of plasma membranes. Approximately 15% of blood cholesterol is derived from our diet, with the remainder synthesized from acetyl CoA by the liver and intestines. Cholesterol is eliminated from the body through its conversion into bile salts, which are eventually discarded in the feces.
Considering cholesterol and...
Considering cholesterol and...
1.9K
Tumor Immunotherapy
2.1K
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.
2.1K
Cytotoxic T Cells-mediated Immune Response
7.9K
Cytotoxic T cells are a vital component of the immune system. They have the remarkable ability to identify and target antigens on infected or abnormal cells. These antigens often originate from intracellular pathogens such as viruses or abnormal proteins cancer cells produce.
Immunological surveillance is the ability of immune cells to monitor and eliminate infected cells with intracellular pathogens, neoplastically transformed cells, and cells with non-self antigens. Cytotoxic T cells and NK...
Immunological surveillance is the ability of immune cells to monitor and eliminate infected cells with intracellular pathogens, neoplastically transformed cells, and cells with non-self antigens. Cytotoxic T cells and NK...
7.9K
The Tumor Microenvironment
8.1K
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...
8.1K
Drugs that Stabilize Microtubules
2.9K
Microtubules are dynamic structures that undergo cycles of catastrophe and rescue. The microtubules play a central role in cell division by forming the spindle apparatus for segregating the chromosomes. This makes them ideal targets for regulating dividing cells in tumors and malignant cancer cells. Microtubule stabilizing drugs help stabilize the microtubule formation and promote its polymerization. Paclitaxel was the first microtubule stabilizing agent used as anticancer drug in chemotherapy...
2.9K
Targeted Cancer Therapies
9.1K
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...
9.1K


