CN115074325A - Herceptin联合4-1BBL体外扩增NK方法 - Google Patents
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Abstract
本发明涉及体外扩增NK细胞的方法领域,尤其涉及Herceptin联合4‑1BBL体外扩增NK方法。本发明将外周血单个核细胞接种到预包被的赫赛汀和4‑1BBL蛋白的细胞培养瓶中,并添加含IL‑2、IL‑15、IL‑21和自体血浆的培养基。其中赫赛汀可以在体外活化NK并促进NK增殖。4‑1BBL蛋白作为配体与NK细胞表面的受体4‑1BB结合并活化,具有促进NK细胞增殖和IFN‑γ的分泌,增强CTL的杀伤活性和ADCC作用。上述技术可以快速活化增殖为纯度高的NK细胞。不需要磁珠或滋养层细胞活化,避免复杂的分选操作,不存在滋养细胞安全性问题及多因子造成的成本过高问题。
Description
技术领域
本发明涉及体外扩增NK细胞的方法领域,尤其涉及Herceptin联合4-1BBL体外扩增NK方法。
背景技术
现有的体外扩增NK细胞技术中,细胞培养方法采用赫赛汀、Herceptin和PHA、RetroNectin+美罗华抗体+鼠抗人CD161抗体包板、透明质酸+CD16+
RetroNectin等等,还有经典的采用滋养细胞的方法。上述方法在操作过程中容易引入安全性问题(例如多种外源因子或试剂的引入均可能增加细胞质量控制的难度,进而增加临床应用的风险),且存在操作复杂,导致工艺不稳定及成本较高的问题。
发明内容
针对背景技术中存在的问题,提出Herceptin联合4-1BBL体外扩增NK方法。本发明将外周血单个核细胞接种到预包被的赫赛汀和4-1BBL蛋白的细胞培养瓶中,并添加含IL-2、IL-15、IL-21和自体血浆的培养基。可以快速活化增殖为纯度高的NK细胞。不需要磁珠或滋养层细胞活化,避免复杂的分选操作,不存在滋养细胞安全性问题及多因子造成的成本过高问题。
本发明提出Herceptin联合4-1BBL体外扩增NK方法,方法步骤包括:
S1、从外周血中分离出单个核细胞;
S2、将外周血单个核细胞接种到预包被的赫赛汀和4-1BBL蛋白的细胞培养瓶中,并添加含IL-2、IL-15、IL-21和自体血浆的培养基;
S3、连续培养14-17天,获得高纯度高活性NK细胞。
优选的,培养前需要先包被Herceptin和4-1BBL。
优选的,包被液的组成成分包括10mlPBS、35ug Her-2和17ug 4-1BBL蛋白,混合制备。
优选的,具体步骤包括:
A、包被:将包被液加入培养瓶,铺平放匀,在4℃条件下,避光过夜;
B、采血:采集外周血15ml,将其加入离心管一中备用;
C、淋巴细胞分离液分离:向离心管中加入等体积PBS至30ml,混匀后转移至提前添加15ml淋巴分离液的离心管二,在1800rpm/800g,室温条件下离心20min,升降速设为0;
D、洗涤PBMC:用吸管将离心后中间白色的PBMC层吸出,在离心管三中加入18-22ml的PBS清洗,在2000rpm条件下离心6min,弃上清;再次用20mlPBS清洗,在1800rpm条件下离心6min,弃上清;使用培养基重悬、混匀、取样,采用typan blue染色计数,1800rpm条件下离心6min,弃上清;
E、配制细胞悬液:用40ml培养基重悬细胞、沉淀、混匀;
F、接种细胞:取40ml上述的细胞悬液加入培养瓶,添加终浓度30ng/ml的IL-15、终浓度100ng/ml的IL-21、终浓度5%的自体血浆、终浓度6000U/ml的IL-2,将接种后的培养瓶置二氧化碳培养箱培养;
G、培养至4、6、8、11和14天时分瓶培养,期间检测,并在第17日回收细胞。
优选的,二氧化碳培养箱的培养条件:温度为37℃,CO2浓度为5%。
与现有技术相比,本发明具有如下有益的技术效果:
本发明将外周血单个核细胞接种到预包被的赫赛汀和4-1BBL蛋白的细胞培养瓶中,并添加含IL-2、IL-15、IL-21和自体血浆的培养基。其中赫赛汀可以在体外活化NK进NK增殖。4-1BBl蛋白作为配体与NK细胞表面的受体4-1BB结合并活化,具有促进NK细胞增殖和IFN-γ的分泌,增强CTL的杀伤活性和ADCC作用。上述技术可以快速活化增殖为纯度高的NK细胞。不需要磁珠或滋养层细胞活化,避免复杂的分选操作,不存在滋养细胞安全性问题及多因子造成的成本过高问题。
附图说明
图1为本发明一种实施例中方法流程示意图;
图2为14天内NK细胞扩增示意图;
图3为流式检测NK细胞的结果示意图。
具体实施方式
实施例一
本发明提出的Herceptin联合4-1BBL体外扩增NK方法,方法步骤包括:
S1、从外周血中分离出单个核细胞;
S2、将外周血单个核细胞接种到预包被的赫赛汀和4-1BBL蛋白的细胞培养瓶中,并添加含IL-2、IL-15、IL-21和自体血浆的培养基;
S3、连续培养14-17天,获得高纯度高活性NK细胞。
实施例二
本发明提出的Herceptin联合4-1BBL体外扩增NK方法,方法步骤包括:
S1、从外周血中分离出单个核细胞;
S2、将外周血单个核细胞接种到预包被的赫赛汀和4-1BBL蛋白的细胞培养瓶中,并添加含IL-2、IL-15、IL-21和自体血浆的培养基;
S3、连续培养14-17天,获得高纯度高活性NK细胞。
进一步的,培养前需要先包被Herceptin和4-1BBL。
进一步的,包被液的组成成分包括10mlPBS、35ug Her-2和17ug 4-1BBl蛋白,混合制备。
实施例三
如图1所示,本发明提出的Herceptin联合4-1BBL体外扩增NK方法,方法步骤包括:
A、包被:将包被液加入T75培养瓶,铺平放匀,在4℃条件下,避光过夜;
B、采血:采集外周血15ml,将其加入50ml的离心管一中备用;
C、淋巴细胞分离液分离:向离心管中加入等体积PBS至30ml,混匀后转移至提前添加15ml淋巴分离液的离心管二,在1800rpm/800g,室温条件下离心20min,升降速设为0;
D、洗涤PBMC:用巴斯德吸管将离心后中间白色的PBMC层吸出,在离心管三中加入18-22ml的PBS清洗,在2000rpm条件下离心6min,弃上清;再次用20mlPBS清洗,在1800rpm条件下离心6min,弃上清;使用20ml培养基重悬、混匀、取样,采用typan blue染色计数,1800rpm条件下离心6min,弃上清;
E、配制细胞悬液:用40mlGT-T551H3培养基重悬细胞、沉淀、混匀;
F、接种细胞:取40ml上述的细胞悬液加入培养瓶,添加终浓度30ng/ml的IL-15、终浓度100ng/ml的IL-21、终浓度5%的自体血浆、终浓度6000U/ml的IL-2,将接种后的培养瓶置二氧化碳培养箱培养;二氧化碳培养箱的培养条件:温度为37℃,CO2浓度为5%;
G、培养至4、6、8、11和14天时分瓶培养,期间检测,并在第17日回收细胞;
H、采用流式检测手段,检测NK细胞表面markerCD3、CD56、CD16。
最终检测结果见图3,由图3可知胞培养14天,IL2+Ab-Her-2+4-1BBL组CD3-CD56+为93.5%,IL2+Ab-Her-2组CD3-CD56+为75.8%,IL2+4-1BBL组CD3-CD56+为47.8%,Control组CD3-CD56+为32.3%。细胞扩增结果见图2,由图2可知,细胞培养14天,IL2+Ab-Her-2+4-1BBL组增殖102倍,IL2+Ab-Her-2组增殖87倍,IL2+4-1BBL组增殖62倍,Control组增殖4倍。
本发明将外周血单个核细胞接种到预包被的赫赛汀和4-1BBL蛋白的细胞培养瓶中,并添加含IL-2、IL-15、IL-21和自体血浆的培养基。其中赫赛汀可以在体外活化NK进NK增殖。4-1BBl蛋白作为配体与NK细胞表面的受体4-1BB结合并活化,具有促进NK细胞增殖和IFN-γ的分泌,增强CTL的杀伤活性和ADCC作用。上述技术可以快速活化增殖为纯度高的NK细胞。不需要磁珠或滋养层细胞活化,避免复杂的分选操作,不存在滋养细胞安全性问题及多因子造成的成本过高问题。可高效扩增NK细胞,14天内细胞扩增140倍,NK细胞纯度高,具有很高的临床价值。
上面结合附图对本发明的实施方式作了详细说明,但是本发明并不限于此,在所属技术领域的技术人员所具备的知识范围内,在不脱离本发明宗旨的前提下还可以作出各种变化。
Claims (5)
1.Herceptin联合4-1BBL体外扩增NK方法,其特征在于,方法步骤包括:
S1、从外周血中分离出单个核细胞;
S2、将外周血单个核细胞接种到预包被的赫赛汀和4-1BBL蛋白的细胞培养瓶中,并添加含IL-2、IL-15、IL-21和自体血浆的培养基;
S3、连续培养14-17天,获得高纯度高活性NK细胞。
2.根据权利要求1所述的Herceptin联合4-1BBL体外扩增NK方法,其特征在于,培养前需要先包被Herceptin和4-1BBL。
3.根据权利要求1所述的Herceptin联合4-1BBL体外扩增NK方法,其特征在于,包被液的组成成分包括10mlPBS、35ug Her-2和17ug 4-1BBl蛋白,混合制备。
4.根据权利要求1所述的Herceptin联合4-1BBL体外扩增NK方法,其特征在于,具体步骤包括:
A、包被:将包被液加入培养瓶,铺平放匀,在4℃条件下,避光过夜;
B、采血:采集外周血15ml,将其加入离心管一中备用;
C、淋巴细胞分离液分离:向离心管中加入等体积PBS至30ml,混匀后转移至提前添加15ml淋巴分离液的离心管二,在1800rpm/800g,室温条件下离心20min,升降速设为0;
D、洗涤PBMC:用吸管将离心后中间白色的PBMC层吸出,在离心管三中加入18-22ml的PBS清洗,在2000rpm条件下离心6min,弃上清;再次用20mlPBS清洗,在1800rpm条件下离心6min,弃上清;使用培养基重悬、混匀、取样,采用typan blue染色计数,1800rpm条件下离心6min,弃上清;
E、配制细胞悬液:用40ml培养基重悬细胞、沉淀、混匀;
F、接种细胞:取40ml上述的细胞悬液加入培养瓶,添加终浓度30ng/ml的IL-15、终浓度100ng/ml的IL-21、终浓度5%的自体血浆、终浓度6000U/ml的IL-2,将接种后的培养瓶置二氧化碳培养箱培养;
G、培养至4、6、8、11和14天时分瓶培养,期间检测,并在第17日回收细胞。
5.根据权利要求4所述的Herceptin联合4-1BBL体外扩增NK方法,其特征在于,二氧化碳培养箱的培养条件:温度为37℃,CO2浓度为5%。
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