循环时钟组件RORA通过抑制PD-L1表达增加了黑色素瘤中的免疫监测
Dandan Liu1,2, Benliang Wei3, Long Liang2
1Department of Dermatology, Hunan Key Laboratory of Skin Cancer and Psoriasis, Hunan Engineering Research Center of Skin Health and Disease, Xiangya Clinical Research Center for Cancer Immunotherapy, Xiangya Hospital, Central South University, Changsha, China.
Cancer research
|May 8, 2024
概括
与酸受体相关的孤儿受体-α (RORA) 抑制PD-L1,增强黑色素瘤的抗瘤免疫力. RORA表达式预测免疫疗法反应,提供了一个新的治疗点.
科学领域:
- 癌症生物学 癌症生物学
- 免疫学 免疫学 免疫学
- 时间生物学 时间生物学
背景情况:
- 循环时钟的干扰在癌症中很常见,促进瘤生长和免疫规避.
- 黑色素瘤中的时钟基因破坏与免疫逃脱有关.
- 在黑色素瘤患者中,与视网酸受体相关的孤儿受体-α (RORA) 表达减少.
研究的目的:
- 研究RORA在黑色素瘤中的作用及其对抗瘤免疫力和免疫治疗反应的影响.
- 阐明RORA调节PD-L1表达和T细胞透的分子机制.
- 评估RORA作为潜在的预测生物标志物和黑色素瘤治疗点.
主要方法:
- 对黑色素瘤患者的RORA表达的分析以及与预后和免疫细胞透的相关性.
- 研究RORA过度表达/激活对细胞毒性T细胞反应的影响.
- 确定RORA与CD274促进体,HDAC3和DDX3X的相互作用,以调节PD-L1.1.
- 在体内评估RORA激动剂和抗CTLA4抗体的协同作用.
- 开发基于HDAC3,DDX3X和RORA表达的预测得分.
主要成果:
- 在黑色素瘤中,RORA的表达下调,与更好的免疫疗法预后和增加的T细胞透相关.
- 罗拉通过在CD274促进体上与HDAC3形成抑制复合物来抑制PD-L1的表达.
- 在RORA结合方面,DDX3X与HDAC3竞争,导致PD-L1表达的增加.
- 联合RORA激动剂和抗CTLA4治疗显示出协同作用的抗瘤作用.
- HDAC3,DDX3X和RORA表达的综合得分预测了免疫治疗反应.
结论:
- 通过抑制PD-L1表达和促进T细胞介导的抗瘤免疫力,RORA充当瘤抑制剂.
- 罗拉是黑色素瘤免疫治疗反应的潜在预测生物标志物.
- 针对RORA或通过HDAC3 / DDX3X调节其复合体可能会改善黑色素瘤免疫治疗结果.
相关概念视频
Circadian Rhythms and Gene Regulation
4.0K
The biological clock is involved in many aspects of regulating complex physiology in all animals. It was in 1935 when German zoologists, Hans Kalmus and Erwin Bünning, discovered the existence of circadian rhythm in Drosophila melanogaster. However, the internal molecular mechanisms behind the circadian clock remained a mystery until 1984, when Jeffrey C. Hall, Michael Rosbash, and Michael W. Young discovered the expression of the Per gene oscillating over a 24-hour cycle. In subsequent...
4.0K
mTOR Signaling and Cancer Progression
3.8K
The mammalian target of rapamycin or mTOR protein was discovered in 1994 due to its direct interaction with rapamycin. The protein gets its name from a yeast homolog called TOR. The mTOR protein complex in mammalian cells plays a major role in balancing anabolic processes such as the synthesis of proteins, lipids, and nucleotides and catabolic processes, such as autophagy in response to environmental cues, such as availability of nutrients and growth factors.
The mTOR pathway or the...
The mTOR pathway or the...
3.8K
PI3K/mTOR/AKT Signaling Pathway
3.5K
The mammalian target of rapamycin (mTOR) is a serine/threonine kinase that regulates growth, proliferation, and cell survival in response to hormones, growth factors, or nutrient availability. This kinase exists in two structurally and functionally distinct forms: mTOR complex 1 (mTORC1) and mTOR complex 2 (mTORC2). The first form (mTORC1) is composed of a rapamycin-sensitive Raptor and proline-rich Akt substrate, PRAS40. In contrast, mTORC2 consists of a...
3.5K
Negative Regulator Molecules
35.3K
Positive regulators allow a cell to advance through cell cycle checkpoints. Negative regulators have an equally important role as they terminate a cell’s progression through the cell cycle—or pause it—until the cell meets specific criteria.
35.3K
Abnormal Proliferation
4.5K
Under normal conditions, most adult cells remain in a non-proliferative state unless stimulated by internal or external factors to replace lost cells. Abnormal cell proliferation is a condition in which the cell's growth exceeds and is uncoordinated with normal cells. In such situations, cell division persists in the same excessive manner even after cessation of the stimuli, leading to persistent tumors. The tumor arises from the damaged cells that replicate to pass the damage to the...
4.5K
The Retinoblastoma Gene
4.1K
Tumor suppressor genes are normal genes that can slow down cell division, repair DNA mistakes, or program the cells for apoptosis in case of irreparable damage. Hence, they play an essential role in preventing the proliferation of damaged cells.
The first-ever tumor suppressor gene called Rb was identified in retinoblastoma - a rare eye tumor in children. In inherited forms of the disease, a child inherits one defective copy of the Rb gene, which predisposes them to retinoblastoma. However,...
The first-ever tumor suppressor gene called Rb was identified in retinoblastoma - a rare eye tumor in children. In inherited forms of the disease, a child inherits one defective copy of the Rb gene, which predisposes them to retinoblastoma. However,...
4.1K


