外基因组传递的波多普拉宁在质母细胞瘤中促进与瘤相关的巨细胞介导的免疫耐受性
Mengwan Wu1,2,3, Ying Shi1, Yuyang Liu4
1Department of Oncology, Sichuan Academy of Medical Sciences, Sichuan Provincial People's Hospital, School of Medicine, University of Electronic Science and Technology of China, Chengdu, Sichuan, China.
CNS neuroscience & therapeutics
|March 12, 2024
概括
质母细胞细胞在细胞外囊泡 (EVsPDPN) 中释放波多普拉宁 (PDPN),促进免疫抑制M2巨细胞. 这种机制通过减少T细胞激活来阻碍免疫疗法,突出显示EVs作为治疗标.
科学领域:
- 神经瘤学神经瘤学
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
背景情况:
- 质母细胞瘤 (GBM) 是一种具有不良预后的侵袭性脑瘤.
- 免疫抑制性瘤微环境,特别是巨细胞,限制了在GBM中免疫治疗的有效性.
研究的目的:
- 调查波多普拉宁 (PDPN) 在质母细胞瘤相关的巨细胞极化和免疫抑制中的作用.
- 探索携带PDPN (EVsPDPN) 的细胞外囊泡作为GBM中免疫逃避的机制.
主要方法:
- 对来自质瘤患者的大量和单细胞RNA测序数据的分析.
- 在质瘤组织中对PDPN,CD68和CD163进行免疫组织化学染色.
- 使用骨髓衍生的巨细胞 (BMDMs) 和T细胞来评估巨细胞极化和T细胞激活的共同培养系统.
主要成果:
- 在质瘤组织中,PDPN表达与CD68和CD163正相关.
- 大细胞细胞化EVsPDPN显示M2极化 (CD163表达) 和分泌免疫抑制细胞因子 (IL-6,IL-10,TNF-α,TGF-β1) 的增加.
- EVsPDPN增强了巨细胞化和降低了MHC II表达,损害了CD4+T细胞激活.
结论:
- 从质母细胞细胞中携带PDPN的细胞外囊泡驱动M2巨细胞介导的免疫抑制.
- EVsPDPN代表了质母细胞瘤免疫治疗的潜在预后标志物和治疗标.
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