阻断NKG2A增强癌症疫苗诱导的CD8T细胞免疫力
Nadine van Montfoort1, Linda Borst1, Michael J Korrer2
1Department of Medical Oncology, Leiden University Medical Center, 2333 ZA, Leiden, the Netherlands.
Cell
|December 4, 2018
概括
阻断NKG2A (一种抑制受体) 通过激活CD8T细胞来增强治疗癌症疫苗. 这种方法有望改善患者的反应,
科学领域:
- 免疫学
- 癌症研究
- T细胞生物学
背景情况:
- 透瘤的CD8T细胞经常表达抑制性NKG2A受体.
- 在免疫反应性瘤和癌症后疫苗接种中,NKG2A的表达很普遍.
- 独立于常见的免疫检查点抑制剂,NKG2A识别出具有共同表达CD103的独特CD8T细胞子集.
研究的目的:
- 研究NKG2A作为对癌症疫苗接种的潜在适应性抵抗机制.
- 在临床前癌症模型中评估阻断NKG2A/ Qa-1b轴的治疗潜力.
主要方法:
- 使用高维集群分析来描述NKG2A+ CD8 T细胞.
- 在四种小鼠瘤模型中使用NKG2A的抗体阻断和其配体Qa-1b (HLA-E ortholog) 的淘汰.
- 评估NKG2A/ Qa-1b轴中断对治疗癌症疫苗疗效的影响.
主要成果:
- 干扰NKG2A/ Qa-1b轴显著增强了治疗癌症疫苗的疗效.
- 即使在PD- 1耐火小鼠模型中也观察到增强的疫苗反应.
- NKG2A阻塞疗法通过CD8T细胞进行作用,而不是NK细胞.
结论:
- 作为一种适应性耐药机制,NKG2A限制了癌症疫苗的有效性.
- 阻断NKG2A/ Qa-1b轴可以克服疫苗耐药性.
- 阻断NKG2A的抗体是改善癌症疫苗临床反应的有希望的策略.
更多相关视频
09:57Real Time Detection of In Vitro Tumor Cell Apoptosis Induced by CD8+ T Cells to Study Immune Suppressive Functions of Tumor-infiltrating Myeloid Cells
Published on: January 29, 2019
23.4K
12:43Generation of a Novel Dendritic-cell Vaccine Using Melanoma and Squamous Cancer Stem Cells
Published on: January 6, 2014
12.2K
相关概念视频
Vaccinations
51.7K
Overview
51.7K
Cancer Vaccines
1.0K
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...
1.0K
Neuromuscular Junction And Blockade
5.0K
The site of chemical communication between a motor neuron and a muscle fiber is called the neuromuscular junction (NMJ). The end of the motor neuron at the NMJ divides into a cluster of synaptic end bulbs. The cytoplasm of these bulbs consists of synaptic vesicles enclosing acetylcholine molecules, the principal neurotransmitter released at the NMJ. The region opposite the synaptic bulb that ends in the muscle fiber is called the motor end plate, which has acetylcholine receptors. Within the...
5.0K
Cell Potential and Free Energy
46.5K
Thermodynamics of a Redox Reaction
Thermodynamics is the branch of physics dealing with the relationship between heat and other forms of energy. In an electrochemical cell, chemical energy is converted into electrical energy.
Thus, a link can be predicted between cell potential, free energy change, and the equilibrium constant for the reaction. Cell potential can also be measured as the oxidant or the reducing strength, and similar acid-base strength measures are reflected in equilibrium...
Thermodynamics is the branch of physics dealing with the relationship between heat and other forms of energy. In an electrochemical cell, chemical energy is converted into electrical energy.
Thus, a link can be predicted between cell potential, free energy change, and the equilibrium constant for the reaction. Cell potential can also be measured as the oxidant or the reducing strength, and similar acid-base strength measures are reflected in equilibrium...
46.5K
What is the Immune System?
128.0K
Overview
128.0K
Mechanisms of Retrovirus-induced Cancers
7.0K
Retroviruses are RNA viruses that have been shown to cause cancers in diverse species, including chickens, mice, cats, and monkeys. The RNA genomes of these viruses are first reverse-transcribed into single and then double-stranded DNA (dsDNA) copies. This dsDNA called proviral DNA then integrates into the host genome. Subsequently, the host cell transcribes the proviral DNA in concert with the chromosomal DNA. This leads to the production of viral RNA and proteins that assemble at the host...
7.0K
