CD47介导的瘤微环境重塑:免疫逃避中的一个中心机制
Hemei Yuan1, Lingling Zhu1, Longhuan Yang1,2
1College of Biological and Food Engineering, Qujing Normal University, Qujing 655011, China.
Acta biochimica et biophysica Sinica
|June 25, 2025
概括
癌细胞使用CD47来逃避免疫检测,但准这种蛋白质有缺点. 对CD47通路和组合疗法的进一步研究可能会产生更好的癌症治疗方法,副作用更少.
科学领域:
- 免疫学 免疫学 免疫学
- 在瘤学瘤学.
- 分子生物学分子生物学
背景情况:
- 免疫逃避是瘤进展的关键机制.
- CD47是一种在癌症中过度表达的蛋白质,通过与SIRPα和TSP-1相互作用,促进免疫耐受性.
- 这种相互作用抑制了免疫细胞的功能,使瘤能够逃避监视.
研究的目的:
- 审查CD47介导的免疫逃避的分子机制.
- 探索瘤微环境在CD47信号传递中的作用.
- 讨论当前的治疗策略和未来的研究方向,以针对CD47.
主要方法:
- 关于CD47,它的配体和免疫逃避机制的研究的文献综述.
- 分析瘤微环境因素对CD47信号传递的影响.
- 评估当前针对CD47的治疗方法及其局限性.
主要成果:
- CD47-SIRPα和CD47-TSP-1相互作用抑制免疫细胞,如巨细胞,树突细胞和T细胞.
- 瘤微环境因素 (例如TNF-α,IFN-γ,HIF-1) 调节CD47的表达和功能.
- 目前的针对CD47的单克隆抗体已经显示出有效性,但也存在副作用和经济问题.
结论:
- CD47是瘤免疫逃逸的关键参与者,受瘤微环境的影响.
- 需要替代治疗策略,包括向药物设计和组合疗法.
- 对CD47的分子通路的进一步调查可能会导致新的抗癌药物开发.
相关概念视频
02:17The Tumor Microenvironment
6.8K
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...
6.8K
01:27Tumor Immunotherapy
675
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.
675
02:53Adaptive Mechanisms in Cancer Cells
5.9K
Cancer cells accumulate genetic changes at an abnormally rapid rate due to the defects in the DNA repair mechanisms. From an evolutionary perspective, such genetic instability is advantageous for cancer development. Mutant cell lines accumulate a series of beneficial mutations that contribute to their progression into cancer.
Some of the advantages that cancer cells have on normal cells include - enhanced ability to divide without terminally differentiating, induce new blood vessel formation,...
Some of the advantages that cancer cells have on normal cells include - enhanced ability to divide without terminally differentiating, induce new blood vessel formation,...
5.9K
02:23Abnormal Proliferation
4.6K
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...
4.6K