模仿NOX2酶的纳米网络调节与瘤相关的巨细胞,以启动先天性和适应性免疫效应
Tingting Zhang1, Weimin Yin2, Yuge Zhao1
1Shanghai Skin Disease Hospital, School of Medicine, Tongji University, Shanghai, 200092, China.
Advanced healthcare materials
|November 17, 2023
概括
一种新型纳米系统 (OFG) 通过控制活性氧物种 (ROS) 来增强巨细胞抗原呈现和抗瘤免疫力. 这种方法可以促进对瘤的先天性和适应性免疫反应.
科学领域:
- 免疫学 免疫学 免疫学
- 纳米技术纳米技术
- 癌症研究 癌症研究
背景情况:
- 瘤相关巨细胞 (TAMs) 是免疫的关键,但由于溶酶体降解,在抗原交叉呈现方面面临挑战.
- 目前的策略往往侧重于TAM两极分化,忽视了抗原处理效率.
研究的目的:
- 开发一种新型纳米系统 (OVA-Fe-GA,OFG),增强巨抗原交叉呈现和抗瘤免疫力.
- 研究OFG在调节活性氧物种 (ROS) 和溶酶体蛋白解中的机制.
主要方法:
- 工程OVA-Fe-GA (OFG) 纳米系统模仿NOX2酶的ROS生成.
- 在B16-OVA瘤模型中研究了OFG对TAM极化,抗原交叉呈现和蛋白酶表达的影响.
- 评估了CD8+ T细胞透和抗瘤免疫反应.
主要成果:
- OFG显著放大了TAMs (4.5倍) 的抗原交叉呈现.
- OFG抑制了氨酸蛋白酶表达,减少了抗原降解.
- 观察到增强的CD8+T细胞活性和全身抗瘤免疫力.
结论:
- OFG有效地恢复TAM先天的抗瘤功能,并增强适应性免疫力.
- 该纳米系统通过TAMs激活先天性和适应性免疫,显示出癌症免疫疗法的前景.
相关概念视频
The Tumor Microenvironment
6.6K
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...
6.6K
Tumor Immunotherapy
530
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.
530
Cytotoxic T Cells-mediated Immune Response
924
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...
924
Cells of the Innate Immune Response
1.7K
The innate immune response is an immediate and non-specific response against pathogens, acting swiftly to prevent the spread of infections. The primary cells involved in this response are phagocytes and natural killer (NK) cells.
Phagocytes
Phagocytes police the peripheral tissues by removing cellular debris and responding to the invasion of foreign substances or pathogens. Many phagocytes attack and remove microorganisms even before lymphocytes detect them. The human body has two general...
Phagocytes
Phagocytes police the peripheral tissues by removing cellular debris and responding to the invasion of foreign substances or pathogens. Many phagocytes attack and remove microorganisms even before lymphocytes detect them. The human body has two general...
1.7K
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


