1.Inducible IL-7 expression enhances proliferation and in vitro antitumor activity of GPC3-specific CAR-T cells
GONG Fusheng1 ; CHEN Shanshan1 ; ZHENG Qiuhong2 ; LIU Qinying1
Chinese Journal of Cancer Biotherapy 2024;31(10):951-956
[摘 要] 目的:探讨IL-7的诱导表达对靶向磷脂酰肌醇蛋白聚糖3(GPC3)嵌合抗原受体基因修饰T淋巴细胞(CAR-T细胞)的增殖和体外抗肿瘤活性的影响。方法:通过无缝克隆将GPC3 CAR序列片段插入GV400载体的BamHⅠ/EcoRⅠ位置,构建第二代CAR慢病毒载体GPC3-BBZ及GPC3-BBZ-NFAT-IL-7,以293T细胞包装相应的慢病毒载体后,感染人T细胞制备CAR-T细胞。实验分为未转导T细胞(NT)组、GPC3- BBZ CAR-T细胞组、GPC3-BBZ-NFAT-IL-7 CAR-T细胞组。采用流式细胞术检测各组CAR-T细胞中CAR的表达水平,qPCR法检测经GPC3蛋白激活的CAR-T细胞中IL-7 mRNA的表达水平,细胞计数法检测CAR-T细胞在GPC3抗原刺激下的增殖能力,ELISA检测CAR-T细胞在受到肿瘤细胞刺激后IL-7、IFN-γ和TNF-α的分泌水平。应用实时细胞分析(RTCA)技术检测CAR-T细胞对人肝癌Huh-7细胞的杀伤作用。结果:成功构建慢病毒载体GPC3-BBZ和GPC3-BBZ-NFAT-IL-7,制备出靶向GPC3的CAR-T细胞。经GPC3抗原激活后,GPC3-BBZ-NFAT-IL-7 CAR-T细胞可有效表达IL-7 mRNA(P < 0.01),其表现出更强的增殖能力(P < 0.05)。与GPC3-BBZ CAR-T细胞相比,GPC3-BBZ-NFAT-IL-7 CAR-T细胞与GPC3阳性靶细胞Huh-7细胞共培养后,分泌更高水平的IL-7、IFN-γ和TNF-α(P < 0.01或P < 0.001)。RTCA结果显示,GPC3-BBZ-NFAT-IL-7 CAR-T细胞对GPC3阳性Huh-7细胞的杀伤活性显著高于GPC3-BBZ CAR-T细胞(P < 0.05)。结论:成功制备可诱导表达IL-7的靶向GPC3的CAR-T细胞,IL-7的诱导表达增强靶向GPC3 CAR-T细胞的免疫活性,在体外展现出较强的肿瘤细胞杀伤能力。
2.Characteristics and functions of long-term passaged human umbilical cord mesenchymal stem cells
HUANG Lijie1 ; XIE Yunqing1 ; LIN Xiaowei1 ; CHEN Wei2 ; ZHENG Qiuhong2 ; YING Mingang2
Chinese Journal of Cancer Biotherapy 2023;30(6):482-488
[摘 要] 目的:探讨传至10代(P10)的人脐带来源间充质干细胞(P10-hUC-MSC)的生物学特性及功能。方法:人脐带来源于厦门弘爱医院(伦理批号:HAXM-MEC-20201012-037-01),分离、收集、培养hUC-MSC并传代培养,收集P1-、P10-hUC-MSC,FCM检测hUC-MSC表型,细胞衰老β-半乳糖苷酶染色法及FCM法检测终末期细胞衰老与凋亡情况,秋水仙碱处理检测细胞染色体稳定性,体外成脂、成骨诱导实验检测其多向分化能力,以不同比例与外周血单个核细胞(PBMC)混合培养后FCM检测T细胞亚群及表型变化。结果:成功分离和培养的P10-hUC-MSC与P1-hUC-MSC的表型相似,表现为CD45、CD34、HLA-DR表达阴性而CD105、CD90阳性率≥95%。终末期的P1-hUC-MSC和P10-hUC-MSC均表现出β-半乳糖苷酶表达阳性和早期凋亡特征,细胞染色体核型一致且保持稳定,未发生转化现象。P1-、P10-hUC-MSC在体外都可被诱导分化成脂肪、成骨细胞。P10-hUC-MSC与PBMC以1∶1混合培养7 d后,可显著上调CD4+/CD8+ T细胞比值、CD4+ Treg细胞比例和PD-1表达(均P<0.01)。结论:长期传代的P10-hUC-MSC仍然保持其生物学特性和安全性,并具备多向分化能力及免疫调节能力,这为最大限度发挥hUC-MSC的临床放疗损伤修复与预防作用提供了前期实验依据和指导。
3.Research progress on roles of autophagy regulating T lymphocyte function in the genesis and development of diseases
YANG Yi1 ; LIU Qinying2 ; ZHENG Qiuhong2 ; CHEN Li1
Chinese Journal of Cancer Biotherapy 2021;28(3):215-224
[Abstract] Autophagy, as an important intracellular metabolic pathway, has been proved to be ubiquitous in many kinds of cells. Its functional impairment can easily cause lots of diseases, such as cancer, leukemia, liver disease, diabetes and heart disease. In particular, autophagy is important for the development, differentiation and regulation of immune function of T lymphocytes. Abnormal autophagy of T lymphocytes can cause immune dysfunction and lead to diseases, such as inflammation, infection and autoimmunity. In view of the important role of autophagy in regulating T lymphocyte function and disease, this article illustrates the research progress on autophagy regulating the homeostasis, survival, proliferation, senescence, metabolism, immune function of T lymphocytes and many diseases, including tumors, in recent years.

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