一种鱼VNAR-IL-15融合蛋白抑制TROP2瘤生长
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Updated: Feb 3, 2026

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Generation of Fluorescent Protein Fusions in Candida Species
Published on: March 4, 2017
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Zhongqiu Wu1, Hao Li2, Yanqing Wang3
1Research Center for Deepsea Bioresources (Sanya), Hainan, 572025, China; School of Medicine and Pharmacy, Ocean University of China, Qingdao, 266003, China.
International journal of biological macromolecules
|February 1, 2026
概括
一种新型的融合蛋白质通过鱼衍生的抗体向TROP2表达瘤输送Interleukin-15 (IL-15). 这种有针对性的方法通过局部激活免疫细胞来增强癌症免疫疗法,减少全身毒性并抑制瘤生长.
科学领域:
- 免疫学 免疫学 免疫学
- 在瘤学瘤学.
- 生物技术是生物技术.
背景情况:
- 介质素-15 (IL-15) 通过激活细胞毒性免疫细胞,并可能将"冷"瘤转化为免疫活性瘤,对癌症免疫疗法有希望.
- 由于系统性毒性,IL-15的临床应用受到阻碍.
- 热囊细胞表面抗原2 (TROP2) 是一个已验证的治疗点,在许多癌症中过度表达,与预后不佳相关.
研究的目的:
- 开发一种向癌症免疫治疗剂,将IL-15传递给TROP2表达瘤.
- 通过启用局部化细胞因子信号传递来减少与IL-15相关的全身毒性.
- 创建一个新的融合蛋白质平台,利用可变新抗原受体 (VNAR) 进行有针对性的传递.
主要方法:
- 一种融合蛋白,vGY2-IL-15sa,是通过将TROP2-向的VNAR (vGY2) 与IL-15超级激动剂和IL-15Rα寿司域连接而设计的.
- 融合蛋白被设计为低内部化和高亲和力,以确保瘤细胞表面保留和局部信号传递.
- 在HEK293F细胞中的生产产生了高纯度蛋白质,其结合亲和力和生物活性使用TROP2结合试验和CTLL-2增殖试验进行了表征.
主要成果:
- 融合蛋白vGY2-IL-15sa对TROP2具有很高的亲和力 (KD = 1.32 × 10-8 M) 和强大的IL-15生物活性 (EC50 = 1.800 ± 0.008 nM).
- 安全性研究表明,融合蛋白被耐受性良好,对体重的影响最小.
- 在一个人性化的非小细胞肺癌 (NSCLC) 鼠标模型中,vGY2-IL-15显著抑制瘤生长和延迟进展.
结论:
- 基于VNAR的工程免疫细胞因子vGY2-IL-15sa有效向TROP2表达瘤.
- 这个平台提供了一个有前途的策略,用于提高IL-15在癌症免疫治疗中的疗效,同时减轻全身毒性.
- 这项研究建立了一个基于VNAR的新型免疫细胞因子平台,用于向癌症治疗.
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