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北京中医药大学生命科学学院,北京
王建勋,E-mail: Jianxun.Wang@bucm.edu.cn
收稿:2025-07-28,
修回:2025-11-17,
录用:2025-11-24,
纸质出版:2025-12-15
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于梦圆,刘秀盈,章笑甜,等.装甲IL15或IL15受体连接体增强靶向CD19的CAR-NK细胞增殖与抗肿瘤活性[J].陆军军医大学学报,2025,47(23):2903-2912.DOI:10.16016/j.2097-0927.202507093.
YU M Y,LIU X Y,ZHANG X T,et al.Armored IL15 or IL15 receptor adaptors enhance proliferation and anti-tumor activity of CD19-targeted CAR-NK cells[J].J Army Med Univ,2025,47(23):2903-2912.DOI:10.16016/j.2097-0927.202507093.
于梦圆,刘秀盈,章笑甜,等.装甲IL15或IL15受体连接体增强靶向CD19的CAR-NK细胞增殖与抗肿瘤活性[J].陆军军医大学学报,2025,47(23):2903-2912.DOI:10.16016/j.2097-0927.202507093. DOI:
YU M Y,LIU X Y,ZHANG X T,et al.Armored IL15 or IL15 receptor adaptors enhance proliferation and anti-tumor activity of CD19-targeted CAR-NK cells[J].J Army Med Univ,2025,47(23):2903-2912.DOI:10.16016/j.2097-0927.202507093. DOI:
目的
2
构建靶向CD19的装甲白细胞介素15(interleukin 15,IL15)或IL15受体连接体(receptor-linker-IL15,RLI)嵌合抗原受体NK细胞(chimeric antigen receptor NK cell,CAR-NK),并进行CAR-NK细胞体外增殖与抗肿瘤活性的初步验证。
方法
2
培养人恶性非霍奇金淋巴瘤患者的自然杀伤细胞(NK92和NK92MI),并用逆转录病毒载体颗粒制备靶向CD19且装甲IL15或RLI的CAR-NK细胞。采用ELISA法检测CAR-NK细胞IL15分泌水平、CFSE法检测CAR-NK细胞的增殖能力。培养人B淋巴白血病细胞Nalm6-GFP-Luc和过表达人类CD19蛋白的人结肠癌细胞hCD19-SW620-GFP-Luc,并检测其表面CD19靶抗原的表达水平。在评估CAR-NK抗肿瘤活性时,使用荧光素酶发光法检测4或12 h时CAR-NK细胞在不同效应细胞与靶细胞数量比例时的杀伤效率,并利用流式细胞术检测CAR-NK细胞肿瘤杀伤时表面CD107a表达,同时使用CBA法检测其细胞因子释放水平。
结果
2
成功构建了装甲IL15或RLI的NK92/NK92MI-CD19 CAR细胞,且装甲IL15或RLI的细胞组IL15分泌水平显著高于没有装甲的细胞(
P
<
0.01)。在无IL-2刺激的情况下,IL15或RLI能够增强CAR-NK增殖能力(
P
<
0.05)。Nalm6-GFP-Luc和hCD19-SW620-GFP-Luc细胞表面CD19高表达,阳性率分别为100.0%和99.7%,可以作为CD19 CAR的靶细胞。IL15或RLI能够增强
NK92/NK92MI细胞来源的CAR-NK细胞的杀伤能力(
P
<
0.05),以及CD107a的表达水平。装甲IL15或RLI的NK92-CD19 CAR细胞有更高的IL2、IL10、IL6、TNF-α、sFasL、IFN-γ、Granulysin释放水平(
P
<
0.05),而装甲IL15或RLI的NK92MI-CD19 CAR细胞有更高的IL2、IL10、IL6、TNF-α、sFas、IFN-γ、Granzyme A、Granzyme B、Perforin、Granulysin释放水平(
P
<
0.05)。
结论
2
装甲IL15或RLI的NK92/NK92MI-CD19 CAR细胞具有良好的抗肿瘤活性,IL15细胞因子与CAR-NK联用具有强大的临床抗肿瘤治疗应用潜力。
Objective
2
To construct CD19-targeted chimeric antigen receptor natural killer (CAR-NK) cells armored with interleukin15 (IL15) or IL15 receptor-linker (RLI) and preliminarily validate their proliferative capacity and anti-tumor activity in vitro.
Methods
2
Natural killer cells (NK92 and NK92MI) from patients with human malignant non-Hodgkin lymphoma were cultured
and CD19-targeted CAR-NK cells armored with IL15 or RLI were prepared using retroviral vector particles. IL15 secretion was measured by ELISA
and proliferative capacity was assessed via CFSE dilution assays. Human B-lymphocytic leukemia cells (Nalm6-GFP-Luc) and human colon cancer cells overexpressing CD19 (hCD19-SW620-GFP-Luc) were cultured
with surface CD19 expression confirmed (>99% positivity for both). Anti-tumor activity was evaluated by measuring cytotoxicity at effector-to-target (E:T) ratios using luciferase-based assays (4/12 h)
detecting surface CD107a expression via flow cytometry
and quantifying cytokine release using CBA assays.
Results
2
NK92/NK92MI-CD19 CAR cells armored with IL15 or RLI were successfully generated. IL15 secretion was significantly higher in armored groups versus non-armored controls (
P
<
0.01). Without IL-2 stimulation
IL15/RLI enhanced CAR-NK proliferation (
P
<
0.05). Both armored designs significantly increased tumor-killing efficiency (
P
<
0.05) and CD107a degranulation. IL15/RLI-arm
ored NK92-CD19 CAR cells exhibited elevated release of IL2
IL10
IL6
TNF-α
sFas
IFN-γ
and Granulysin (
P
<
0.05)
while armored NK92MI-CD19 CAR cells showed additional increases in Granzyme A
Granzyme B
and Perforin (
P
<
0.05).
Conclusion
2
IL15/RLI-armored NK92/NK92MI-CD19 CAR cells demonstrate potent anti-tumor activity
supporting their combined clinical therapeutic potential for tumors.
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