来自结直肠癌细胞的外基因组抑制B细胞介导的抗瘤免疫力
相关实验视频
Updated: May 30, 2025

09:59
Preparation of Exosomes for siRNA Delivery to Cancer Cells
Published on: December 5, 2018
24.8K
Yukun Zhang1, Yeping Yu1, Xiaodong Gu1
1Department of General Surgery, Huashan Hospital, Fudan University, Shanghai 200040 China.
International immunopharmacology
|January 30, 2025
概括
结肠直肠癌外体 (MC38-Exos) 通过诱导免疫抑制表型和损害T细胞功能来抑制抗瘤B细胞免疫力. 在体内抑制MC38-Exos可以恢复B细胞介导的抗瘤免疫力.
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:
- 来自癌细胞的外基因组影响瘤免疫微环境,可能限制免疫疗法的有效性.
- 外体对B细胞依赖性抗瘤免疫的具体影响尚不清楚.
研究的目的:
- 研究来自小鼠结直肠癌细胞系 (MC38-Exos) 的外体对B细胞功能和抗瘤免疫的影响.
- 阐明MC38-Exos调节B细胞的分子机制.
- 在体内评估抑制MC38-Exos的治疗潜力.
主要方法:
- 用MC38-Exos对B细胞进行治疗.
- 对B细胞增殖,生存,表型 (IL-10,TGF-β) 和CD8+T细胞功能障碍的分析.
- 转录组分析 (RNA测序) 以确定受影响的基因路径 (BCR信号,抗原处理,亡).
- 通过KEGG路径分析和西布洛特来验证机械学见解 (NF-κB路径).
- 在体内研究以评估MC38-Exo抑制对B细胞介导的抗瘤免疫的作用.
主要成果:
- MC38-Exos诱导了B细胞中的免疫抑制表型,抑制了它们的增殖和生存.
- 用MC38-Exos治疗的B细胞获得了调节性B细胞特征,上调IL-10和TGF-β.
- 经过MC38-Exos处理的B细胞降低了CD8+T细胞的疗效.
- 转录组分析显示,B细胞受体信号和抗原处理通路的抑制,以及亡通路的上调调节.
- 确定NF-κB途径作为一个关键的机制性标.
- 抑制MC38-Exos在体内重新激活的B细胞介导的抗瘤免疫.
结论:
- MC38-Exos极大地改变了B细胞转录组,导致B细胞依赖的抗瘤免疫力减弱.
- 向MC38-Exos通过增强抗瘤免疫力,为人类结直肠癌提供了潜在的治疗策略.
相关概念视频
Overview of Exosomes
2.7K
Exosomes are stable, lipid bilayer-enclosed vesicles capable of crossing biological barriers. They can carry a wide range of molecules required for intercellular communication. Once exosomes are released from the cell where they originated, they enter a recipient cell through various pathways such as fusion, receptor-mediated endocytosis, macropinocytosis, and phagocytosis.
Stahl et al. discovered exosomes in 1983, but the exosomes were initially considered waste products released from the...
Stahl et al. discovered exosomes in 1983, but the exosomes were initially considered waste products released from the...
2.7K
Tumor Immunotherapy
466
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.
466
The Tumor Microenvironment
6.5K
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...
6.5K
Cancer Stem Cells and Tumor Maintenance
4.7K
Early diagnosis and treatment can often cure cancer. However, even with treatment, residual cells called cancer stem cells (CSC) might remain, often causing tumor recurrence. These cancer stem cells possess the potential for self-renewal and multi-lineage differentiation and are often responsible for the therapeutic resistance displayed in most cancers.
Cancer stem cells are thought to originate from tissue-specific normal stem cells or progenitor cells. The normal stem cells usually reside in...
Cancer stem cells are thought to originate from tissue-specific normal stem cells or progenitor cells. The normal stem cells usually reside in...
4.7K

