通过Poxin转基因的DNA感应抑制增强NK细胞活性
Ling-Zu Kong1, Seok-Min Kim2, Soo Yun Lee2
1Center for Gene and Cell Therapy, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon 34141, Republic of Korea; Department of Biochemistry, College of Natural Sciences, Chungnam National University, Daejeon 34134, Republic of Korea.
Journal of advanced research
|June 2, 2025
概括
毒素蛋白抑制了自然杀手 (NK) 细胞中的循环GMP-AMP合成酶 (cGAS) DNA感知,提高了它们对抗癌症的能力. 这增强了NK细胞介导的抗瘤活性和细胞毒性,改善了癌症治疗.
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:
- 自然杀手 (NK) 细胞疗法在癌症治疗方面表现有前途,但由于NK细胞寿命短和瘤微环境抑制,它面临着局限性.
- 循环GMP-AMP合成酶 (cGAS) 途径可能有助于瘤内的NK细胞抑制.
- 毒素是一种病毒蛋白质,降解循环GMP-AMP (cGAMP),并可能减轻NK细胞中DNA感知诱导的压力.
研究的目的:
- 调查毒素表达是否可以抑制NK细胞中的DNA感知通路.
- 为了确定Poxin是否增强NK细胞细胞毒性功能和抗瘤活性.
主要方法:
- 产生了表达毒素转基因的NK-92细胞.
- 使用等离子体转染或辐射刺激cGAS-STING通路以诱导双链DNA (dsDNA).
- 评估NK细胞活性,孔素和花酶B水平,进行RNA-seq,并评估表达毒素NK-92和CAR-NK-92细胞的抗瘤功效.
主要成果:
- 毒素表达显著抑制了cGAS-STING通路通过dSDNA的激活.
- RNA-seq揭示了在表达毒素NK-92细胞中的细胞毒性介质 (перфорин,格兰酶B) 的增加.
- 与对照组相比,转基因NK-92/CAR-NK-92细胞表现出增强的抗瘤活性.
结论:
- 毒素有效地抑制NK细胞中DNA传感介导的先天免疫力.
- 毒素增强NK细胞细胞毒性和抗瘤有效性.
- 毒素代表了一种改善NK细胞基癌症免疫疗法的潜在策略.
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