Chimeric antigen receptor-natural killer(CAR-NK) cells have emerged as another prominent player in the realm of tumor immunotherapy following CAR-T cells. The unique features of CAR-NK cells make it possible to compen...Chimeric antigen receptor-natural killer(CAR-NK) cells have emerged as another prominent player in the realm of tumor immunotherapy following CAR-T cells. The unique features of CAR-NK cells make it possible to compensate for deficiencies in CAR-T therapy, such as the complexity of the manufacturing process, clinical adverse events, and solid tumor challenges. To date, CAR-NK products from different allogeneic sources have exhibited remarkable anti-tumor effects on preclinical studies and have gradually been applied in clinical practice.However, each source has advantages and disadvantages. Selecting a suitable source may help maximize CAR-NK cell efficacy and increase the feasibility of clinical transformation. Therefore, this review discusses the development and challenges of CAR-NK cells from different sources to provide a reference for future exploration.展开更多
为了探讨氢化可的松(hydrocortisone,HC)对NK-92MI细胞株杀伤活性及凋亡的影响,用不同浓度的HC处理NK-92MI细胞;采用MTT比色法测定NK-92MI细胞的增殖率和对靶细胞的杀伤作用;流式细胞术检测NK-92MI细胞凋亡率;RT-PCR检测凋亡相关基因Bc...为了探讨氢化可的松(hydrocortisone,HC)对NK-92MI细胞株杀伤活性及凋亡的影响,用不同浓度的HC处理NK-92MI细胞;采用MTT比色法测定NK-92MI细胞的增殖率和对靶细胞的杀伤作用;流式细胞术检测NK-92MI细胞凋亡率;RT-PCR检测凋亡相关基因Bcl-2、Bax的表达。结果显示,作用NK-92MI细胞24、48、72 h后,7.5μg/dl和15μg/dl的HC对其增殖无明显抑制作用(P>0.05),30μg/dl、60μg/dl、120μg/dl、240μg/dl的HC对其增殖均有明显抑制作用(P<0.05),且呈浓度时间依赖性;效靶比为5∶1时,7.5μg/dl和15μg/dl的HC对NK-92MI细胞杀伤活性无显著影响(P>0.05),30μg/dl、60μg/dl、120μg/dl、240μg/dl的HC对其杀伤活性抑制作用显著(P<0.05),呈浓度依赖性;60μg/dl、240μg/dl的HC可诱导NK-92MI细胞发生凋亡;与对照组相比,60μg/dl HC 24 h组Bcl-2基因表达降低(P<0.05),Bax基因表达增高(P<0.01)。提示,应激浓度的HC可以抑制NK-92MI细胞增殖并且降低其杀伤活性,机制可能是通过诱导NK-92MI细胞凋亡,而后者与Bax/Bcl-2基因表达增高有关。展开更多
目的探讨益艾康含药血清对人自然杀伤细胞增殖及其效应分子颗粒酶、穿孔素基因表达的影响。方法培养人NK-92MI细胞系,设空白对照组,4﹪、8﹪、10﹪、15﹪含药血清组,48h后分别加入空白鼠血清及不同浓度的益艾康含药血清,继续培养6h后观...目的探讨益艾康含药血清对人自然杀伤细胞增殖及其效应分子颗粒酶、穿孔素基因表达的影响。方法培养人NK-92MI细胞系,设空白对照组,4﹪、8﹪、10﹪、15﹪含药血清组,48h后分别加入空白鼠血清及不同浓度的益艾康含药血清,继续培养6h后观测NK-92MI细胞数量变化、增殖及对其靶细胞K562的细胞毒效应;Real Time PCR检测NK细胞效应分子颗粒酶、穿孔素基因的表达。结果与空白对照组相比,不同浓度的益艾康含药血清均能够促进NK-92MI细胞增殖,8﹪、10﹪益艾康含药血清组NK-92MI细胞的细胞毒效应明显高于空白对照组(P﹤0.05);2-△△Ct法分析表明8﹪益艾康含药血清能明显上调NK-92MI细胞颗粒酶基因的表达。结论益艾康含药血清能显著促进NK-92MI细胞增殖,增强NK-92MI细胞毒功能,其机制可能与上调颗粒酶基因的表达有关。展开更多
文摘Chimeric antigen receptor-natural killer(CAR-NK) cells have emerged as another prominent player in the realm of tumor immunotherapy following CAR-T cells. The unique features of CAR-NK cells make it possible to compensate for deficiencies in CAR-T therapy, such as the complexity of the manufacturing process, clinical adverse events, and solid tumor challenges. To date, CAR-NK products from different allogeneic sources have exhibited remarkable anti-tumor effects on preclinical studies and have gradually been applied in clinical practice.However, each source has advantages and disadvantages. Selecting a suitable source may help maximize CAR-NK cell efficacy and increase the feasibility of clinical transformation. Therefore, this review discusses the development and challenges of CAR-NK cells from different sources to provide a reference for future exploration.
文摘为了探讨氢化可的松(hydrocortisone,HC)对NK-92MI细胞株杀伤活性及凋亡的影响,用不同浓度的HC处理NK-92MI细胞;采用MTT比色法测定NK-92MI细胞的增殖率和对靶细胞的杀伤作用;流式细胞术检测NK-92MI细胞凋亡率;RT-PCR检测凋亡相关基因Bcl-2、Bax的表达。结果显示,作用NK-92MI细胞24、48、72 h后,7.5μg/dl和15μg/dl的HC对其增殖无明显抑制作用(P>0.05),30μg/dl、60μg/dl、120μg/dl、240μg/dl的HC对其增殖均有明显抑制作用(P<0.05),且呈浓度时间依赖性;效靶比为5∶1时,7.5μg/dl和15μg/dl的HC对NK-92MI细胞杀伤活性无显著影响(P>0.05),30μg/dl、60μg/dl、120μg/dl、240μg/dl的HC对其杀伤活性抑制作用显著(P<0.05),呈浓度依赖性;60μg/dl、240μg/dl的HC可诱导NK-92MI细胞发生凋亡;与对照组相比,60μg/dl HC 24 h组Bcl-2基因表达降低(P<0.05),Bax基因表达增高(P<0.01)。提示,应激浓度的HC可以抑制NK-92MI细胞增殖并且降低其杀伤活性,机制可能是通过诱导NK-92MI细胞凋亡,而后者与Bax/Bcl-2基因表达增高有关。
文摘目的探讨益艾康含药血清对人自然杀伤细胞增殖及其效应分子颗粒酶、穿孔素基因表达的影响。方法培养人NK-92MI细胞系,设空白对照组,4﹪、8﹪、10﹪、15﹪含药血清组,48h后分别加入空白鼠血清及不同浓度的益艾康含药血清,继续培养6h后观测NK-92MI细胞数量变化、增殖及对其靶细胞K562的细胞毒效应;Real Time PCR检测NK细胞效应分子颗粒酶、穿孔素基因的表达。结果与空白对照组相比,不同浓度的益艾康含药血清均能够促进NK-92MI细胞增殖,8﹪、10﹪益艾康含药血清组NK-92MI细胞的细胞毒效应明显高于空白对照组(P﹤0.05);2-△△Ct法分析表明8﹪益艾康含药血清能明显上调NK-92MI细胞颗粒酶基因的表达。结论益艾康含药血清能显著促进NK-92MI细胞增殖,增强NK-92MI细胞毒功能,其机制可能与上调颗粒酶基因的表达有关。
