内皮OX40激活促进瘤细胞通过S1P/YAP介导的血管生成从T细胞监测中逃脱
Baoyu He1, Rou Zhao1, Baogui Zhang2
1Department of Laboratory Medicine.
The Journal of clinical investigation
|March 3, 2025
概括
瘤内皮细胞 (ECs) 表达OX40,通过促进血管生成阻碍抗瘤免疫力. 针对这种OX40-SPNS2-S1P-YAP通路可以改善癌症免疫治疗结果.
科学领域:
- 在瘤学瘤学.
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
背景情况:
- 瘤微环境 (TME) 的复杂性会影响癌症免疫疗法的有效性.
- 了解非免疫细胞在TME中的作用对于改善治疗至关重要.
研究的目的:
- 研究OX40在TME内的瘤内皮细胞 (ECs) 中的作用.
- 阐明EC中OX40影响抗瘤免疫力和患者预后的机制.
主要方法:
- 分析瘤EC中的OX40表达及其与患者预后的关联.
- 使用条件OX40功能损失和功能增益的转基因小鼠模型.
- 研究的分子途径涉及Lgr5+癌症干细胞,EGF/STAT3,Spns2,S1P,YAP和LATS1.
主要成果:
- 瘤EC中的高OX40表达与患者预后不佳相关,独立于T细胞激活.
- 在EC中OX40信号促进了血管新生,抵消了T细胞介导的抗瘤作用.
- 富含白素的重复含有GPCR5 (Lgr5+) 癌症干细胞通过EGF/STAT在EC中诱导OX40.3.
- 通过Spns2,OX40激活干扰了通过Spns2输出sphingosine 1-phosphate (S1P),导致细胞内S1P的积累.
- 累积的S1P通过破坏YAP-LATS1相互作用促进了YAP核转移.
- 一种YAP抑制剂Verteporfin增强了OX40激动剂的抗瘤作用.
结论:
- 在瘤EC中,OX40通过促进血管生成和抑制抗瘤免疫力,发挥出意想不到的突起性瘤作用.
- 在EC中发现的OX40-SPNS2-S1P-YAP轴代表了一个新的治疗点.
- 非免疫细胞对免疫疗法的结果有很大影响,需要更广泛的治疗策略.
相关概念视频
Regulation of Angiogenesis and Blood Supply
2.5K
Rapidly dividing tumors, embryos, and wounded tissues require more oxygen than usual, lowering the oxygen concentration in the blood. At low oxygen or hypoxic conditions, an oxygen-sensitive transcription factor called the hypoxia-inducible factor 1 or HIF1 is activated. HIF1 is a dimeric protein of alpha (ɑ) and beta (β) subunits. Under optimal oxygen conditions, HIF1β is present in the nucleus while HIF1ɑ remains in the cytosol. HIF1ɑ is hydroxylated by prolyl...
2.5K
Mechanism of Angiogenesis
5.2K
Blood vessel formation starts early during embryonic development, around day 7. In the extraembryonic yolk sac, mesodermal precursor cells called hemangioblast proliferate and differentiate into angioblast. Angioblasts express vascular endothelial growth factor receptor 2 or VEGFR2, which binds VEGF-A, a proangiogenic factor, guiding blood vessel formation. VEGF signaling promotes angioblasts to form a blood island in the developing embryo. Angioblasts further differentiate, giving rise to...
5.2K
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
Metastasis
5.5K
Metastasis is the spread of cancer cells from the original site to distant locations in the body. Cancer cells can spread via blood vessels (hematogenous) as well as lymph vessels in the body.
Epithelial-to-Mesenchymal Transition
The epithelial-to-mesenchymal transition or EMT is a developmental process commonly observed in wound healing, embryogenesis, and cancer metastasis. EMT is induced by transforming growth factor-beta (TGF-β) or receptor tyrosine kinase (RTK) ligands, which further...
Epithelial-to-Mesenchymal Transition
The epithelial-to-mesenchymal transition or EMT is a developmental process commonly observed in wound healing, embryogenesis, and cancer metastasis. EMT is induced by transforming growth factor-beta (TGF-β) or receptor tyrosine kinase (RTK) ligands, which further...
5.5K
Cancer Cell Migration through Invadopodia
2.3K
Invadosome is a broad category of cell surface structures with proteolytic activity that degrades the extracellular matrix (ECM). Invadosomes are present in normal cell types, including macrophages, endothelial cells, and neurons, as well as tumor cells. Although the macrophage podosomes and tumor cell invadopodia are classified as invadosomes, they have different structures, molecular pathways, and functions. Podosomes are short structures that last for a few minutes. However,...
2.3K
Overview of Cell-Matrix Interactions
7.0K
The extracellular matrix or ECM holds cells together to form a tissue and allows the cells within the tissue to communicate. ECM comprises proteins such as fibronectin, collagen, laminin, etc. The most abundant protein in this space is collagen. Collagen fibers are interwoven with carbohydrate-containing protein molecules called proteoglycans. ECM allows cell migration and provides a structural scaffold at cell adhesion that anchors the cell when the extracellular matrix proteins interact with...
7.0K


