黑色素瘤通过炎症诱导的可逆脱差异化抵抗T细胞疗法
Jennifer Landsberg1, Judith Kohlmeyer, Marcel Renn
1Laboratory of Experimental Dermatology, Department of Dermatology and Allergy, University of Bonn, D-53105 Bonn, Germany.
Nature
|October 12, 2012
概括
黑色素瘤的采用细胞转移 (ACT) 治疗可能会因为瘤细胞失去向抗原而失败. 这项研究揭示了炎症导致可逆抗原损失,导致复发. 未来的疗法应该针对多个抗原.
科学领域:
- 免疫学 免疫学 免疫学
- 在瘤学瘤学.
- 细胞生物学 细胞生物学
背景情况:
- 采用细胞转移 (ACT) 疗法对转移性黑色素瘤有希望,但经常面临瘤复发.
- 由于有限的实验模型,获得性耐药性的机制,如抗原损失和T细胞耐受性,尚未完全理解.
研究的目的:
- 在一个相关的黑色素瘤模型中研究获得ACT耐药性的机制.
- 在最初成功的T细胞免疫疗法后,确定导致瘤复发的因素.
主要方法:
- 在基因工程小鼠黑色素瘤模型中建立了有效的ACT协议.
- 进行了连续移植实验,观察黑色素瘤细胞表型变化.
- 研究了细胞因子瘤亡因子-α (TNF-α) 在黑色素瘤细胞脱差和抗原表达中的作用.
主要成果:
- 黑色素瘤通过炎症诱导的黑色素细胞抗原的可逆性损失获得了对ACT的耐药性.
- 黑色素瘤细胞表现出表型的可塑性,在对炎症刺激的反应中在分化和非分化状态之间切换.
- 瘤亡因子-α (TNF-α) 直接诱导可逆脱差,导致特异性T细胞对黑色细胞抗原的识别减少.
结论:
- 在炎症微环境中的黑色素瘤细胞的表型可塑性驱动了ACT后的瘤复发.
- 未来的ACT策略应该针对黑色素细胞和非黑色素细胞抗原来克服耐药性.
- 建议将ACT与通过调节瘤微环境来维持T细胞功能的策略相结合.
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