水飞蓟宾对γδT细胞杀伤胃癌细胞SGC-7901的影响及其机制初探

探讨水飞蓟宾对人γδT细胞杀伤胃癌细胞SGC-7901的影响及其作用机制。分离健康志愿者外周血单个核细胞,体外经多种细胞因子诱导培养为γδT细胞;收集培养、扩增7d后的γδT细胞,将其用不同浓度的水飞蓟宾诱导24h、48h及72h,CCK-8法检测γδT细胞增殖情况;流式细胞术(FCM)检测γδT穿孔素(perforin,PFP)、细胞颗粒酶B(Granzyme B,Gran B)及CDl07a的表达;western-blot法检测γδT细胞P-ERK1/2、Bcl-2、P-AKT、β-catenin的表达;乳酸脱氢酶(LDH)法检测γδT细胞对胃癌细胞SGC-7901的杀伤活性。结果发现浓度在1.6~100μg/ml的水飞蓟宾作用γδT细胞72h后,γδT细胞增殖率较对照组显著增加(P0.05),且在25μg/ml时达到最高峰;将6.25~100μg/ml水飞蓟宾诱导γδT细胞72h后,γδT细胞的PFP、Gran B及CDl07a的表达以及P-ERK1/2、Bcl-2、P-AKT、β-catenin的表达与对照组比较均不同程度增加(P0.05),且对胃癌细胞SGC-7901的杀伤活性显著增强(P0.05)。以上实验结果提示一定浓度的水飞蓟宾对γδT细胞具有促进增殖作用,其机制可能与激活P-ERK1/2、Bcl-2、P-AKT及β-catenin信号通路有关。一定浓度的水飞蓟宾能够增加γδT细胞对胃癌细胞的杀伤活性,其作用机制可能与水飞蓟宾能够增加γδT细胞的穿孔素、Gran B及CDl07a的表达有关。     

复方苦参对人末梢血γδT细胞杀伤胃癌细胞株SGC-7901作用的研究

目的探讨复方苦参对人γδT细胞杀伤胃癌细胞株SGC-7901的影响。方法用异戊烯焦磷酸法体外扩增人外周血γδT细胞,用不同浓度的复方苦参诱导γδT细胞SGC-7901细胞株24h,用MTT法检测复方苦参对这两种细胞生长抑制率的影响和LDH法检测γδT细胞的杀伤活性,用流式细胞术检测诱导前后的18T细胞和SGC-7901的凋亡率。结果γδT细胞培养10d时从扩增前4．21％增加到70．35％,CD44达94．0％。不同浓度的复方苦参对SGC-7901细胞株的抑制率（22．3％）均明显高于γδT细胞（-22．4％）,且γδT细胞的抑制率呈负的趋势,当复方苦参的浓度在1／50～1／400时γδT细胞负抑制率呈剂量依赖关系,且经复方苦参诱导24h的γδT细胞杀伤活性（83．6％）明显高于先诱导SGC-7901组（71．2％）,同时经复方苦参诱导24h的18T细胞凋亡率（4．64％）明显低于SGC-7901（49．23％）。结论复方苦参在临床常规使用浓度下,能够促进78T细胞的增殖,同时能够抑制肿瘤细胞的生长,且能够增强γδT细胞的杀伤活性,这一结果将有助于肿瘤的过继免疫治疗及为复方苦参应用于肿瘤治疗提供了临床依据。     

辣椒素对人γδT细胞杀伤人骨肉瘤HOS细胞的影响

探讨辣椒素对人γδT细胞体外增殖及杀伤骨肉瘤细胞的影响及作用机制。分离健康人PBMC,加入到含异戊烯焦磷酸(isopentenyl pyrophosphate,IPP)和IL-2的DMEM-F12完全培养基中诱导培养γδT细胞。不同浓度的辣椒素作用于γδT细胞48h后,CCK-8法检测各药物浓度组γδT细胞的增殖能力,采用流式细胞术检测各组γδT细胞穿孔素、颗粒酶B、CD107a及IFN-γ的表达,用LDH释放法检测各组γδT细胞对骨肉瘤HOS细胞的体外杀伤活性。结果显示,培养7d时各组γδT细胞纯度达到了(85.33±6.07)%。浓度为3.2~50μmol/L的辣椒素能显著促进γδT细胞的增殖,在浓度为25μmol/L时其穿孔素、颗粒酶B、CD107a及IFN-γ的表达均显著高于对照组,且对人骨肉瘤HOS细胞的体外杀伤活性显著增强。以上结果提示辣椒素在体外能通过促进γδT细胞穿孔素、颗粒酶B和IFN-γ的表达上调显著增强其抗骨肉瘤细胞活性。     

阿司匹林对人γδT细胞杀伤消化系统肿瘤细胞的影响

目的:探讨阿司匹林对人γδT细胞杀伤消化道肿瘤细胞株的影响.方法:用异戊烯焦磷酸法体外扩增人外周血γδT细胞.用不同浓度的阿司匹林诱导γδT细胞和消化道肿瘤SGC-7901、SW-1990、SW-480、SW-1116、LOVO细胞株, 用乳酸脱氢酶法测定γδT细胞的杀伤活性, 用流式细胞术(FCM)检测阿司匹林诱导前后的γδT细胞和SGC-7901、SW-1990、SW-480、SW-1116和LOVO细胞凋亡百分率.结果:γδT细胞培养10 d时从扩增前4.21%增加到70.35%.阿司匹林0.4～0.8 mmol/L诱导24 h后的γδT细胞对5种肿瘤细胞的杀伤活性最高, 浓度超过3.2 mmol/L时杀伤活性呈下降趋势;SGC-7901、SW-1990、SW-480、SW-1116和LOVO细胞经不同浓度的阿司匹林诱导24 h后除药物浓度在0.4 mmol/L时γδT细胞对SW-480、SW-1116和LOVO细胞株的杀伤活性略有增强外, 其他组与对照组比较无明显变化.3.2 mmol/L阿司匹林对γδT细胞诱导24 h的凋亡率(52.71%)明显高于SGC-7901、SW-1990、SW-480、SW-1116和LOVO细胞株(分别为7.88%、8.89%、6.21%、4.47%和%3.67).结论:阿司匹林在临床常规使用的药物浓度时可增强γδT细胞杀伤肿瘤细胞作用, 超过这一浓度可明显抑制γδT细胞的增殖能力和杀伤活性及增加γδT细胞的凋亡率, 而对SGC-7901、SW-1990、SW-480、SW-1116和LOVO细胞株作用不明显.     

白藜芦醇对γδT细胞杀伤结肠癌SW-1116细胞的影响及机制研究

目的 观察白藜芦醇作用前后γδT细胞对结肠癌SW-1116细胞杀伤活性的变化,并探讨其发生的机制。方法 异戊烯焦磷酸法体外扩增人外周血γδT细胞,不同浓度的白藜芦醇作用于γδT细胞和结肠癌SW-1116细胞,四甲基偶氮唑蓝(MTT)法检测白藜芦醇对γδT细胞及结肠癌细胞的生长的影响;流式细胞术(FCM)检测白藜芦醇作用前后γδT细胞穿孔素、颗粒酶B、CD107a的表达;乳酸脱氢酶( LDH)释放法检测白藜芦醇对γδT细胞杀伤结肠癌SW-1l16细胞活性的影响。Western blot检测药物作用前后γδT细胞细胞外信号调节激酶(ERK1/2)蛋白的活性的变化。结果 白藜芦醇在0.39 ～3.125μmol/L时对γδT细胞的生长具有促进作用,对结肠癌SW-1116细胞作用不明显;经白藜芦醇诱导后γδT细胞的穿孔素、颗粒酶B、CD107a的表达显著高于对照组(P＜0.05);对结肠癌SW-1116细胞的杀伤活性也显著高于未诱导组(P＜0.05);经浓度为0.1～10 μmol/L白藜芦醇作用的γδT细胞的p-ERK1/2表达较对照组增加(P＜0.05)。结论 白藜芦醇能够促进γδT细胞的增殖,并增强其对结肠癌SW-1116细胞的杀伤能力,其机制可能与上调γδT细胞表面的穿孔素、颗粒酶B、CD107a的表达及活化细胞外信号调节激酶等有关。     

Gardiquimod增强人γδT细胞杀伤肿瘤细胞的研究

目的研究Toll样受体7激动剂(Gardiquimod)对人γδT细胞杀伤肿瘤作用的影响。方法以异戊烯焦磷酸法扩增人外周血γδT细胞。用不同浓度的Gardiquimod处理γδT细胞和肺癌细胞A549,MTT法检测细胞增殖情况。LDH法检测Gardiquimod处理后γδT细胞对A549的杀伤活性;流式细胞术检测处理前后γδT细胞上CD107a、穿孔素和颗粒酶的表达情况。结果 Gardiquimod在5.0~0.31μg/ml浓度可明显促进γδT细胞增殖,同时抑制A549增殖。Gardiquimod处理γδT细胞后,杀伤A549能力明显增强,且CD107a、颗粒酶及穿孔素的表达显著升高,与对照组相比,有统计学差异(P<0.05)。结论 Gardiquimod通过增高γδT细胞上的CD107a、颗粒酶及穿孔素的表达来增强其杀伤肿瘤作用。     

γδT细胞的抗原识别机制

Ｔ细胞表面表达两类抗原受体（ＴＣＲ）：ＴＣＲαβ和ＴＣＲγδ。ＴＣＲαβ可特异地识别由抗原呈递细胞（ＡＰＣ）表面Ⅰ类或Ⅱ类ＭＨＣ分子呈递的抗原肽，而ＴＣＲγδ则主要以ＭＨＣ非限制方式识别各类抗原。最近对ＴＣＲγδ所识别的抗原类型及方式进行了较为深入的研究，本文就其进展作一述评。１　ＴＣＲγδ的多样性和分布特点提示其抗原识别的特殊性　　同ＴＣＲαβ和免疫球蛋白（Ｉｇ）类似，ＴＣＲγδ基因由重组的Ｖ、Ｄ、Ｊ和Ｃ区组成。虽然γ、δ位点的Ｖ区多样性不及α和β，但其连接区多样性则使ＴＣＲγδ存在甚至超过Ｔ…     

双氢青蒿素对γδT细胞杀伤SW1990细胞的增强作用

目的 探讨双氢青蒿素(dihydroartemisinin,DHA)对人外周血γδT细胞体外增殖及抗肿瘤活性的影响.方法 分离健康人外周血单个核细胞(PBMC),加入到含异戊烯焦磷酸(isopentenyl pyrophosphate,IPP)和IL-2的RPMI 1640完全培养基中诱导培养γδT细胞.不同浓度的DHA作用于γδT细胞4δ h后,MTT法检测各药物浓度组γδT细胞的增殖能力,采用流式细胞术检测各组γδT细胞穿孔素、颗粒酶B和CD107a的表达,用CCK-8试剂盒检测各组γδT细胞对SW1990细胞的体外杀伤效应.结果 培养8d时各组γδT细胞纯度达到了75.46％ ±5.32％.浓度为50～100μmol/ml的DHA能显著促进γδT细胞的增殖.DHA处理后γδT细胞杀伤胰腺癌SW1990细胞能力及其穿孔素、颗粒酶B和CD107a的表达均显著高于对照组.结论 DHA可增强γδT细胞抗肿瘤活性,其机制可能与其促进γδT细胞穿孔素和颗粒酶B的表达上调有关.     

γδT细胞的生物学意义

<正>T淋巴细胞表面可分别表达两种与CD3分子相关联的T细胞抗原受体(T cell re-ceptor,TCR):由α链和β链(TCRαβ)或γ链和δ链构成的异质二聚体.人们一直对αβT细胞的结构和功能研究予以很大程度上的关注,而对于γδT细胞研究投入要少些.主要原因可能是人们认为TCRγδ细胞是一个外周淋巴细胞库中的数量较小的亚群,不大可能在免疫应答中起主要作用.γδT细胞约占正常人外周血淋巴细胞总数的3%～10%,在其表面表达CD3分子,但绝大多数不表达CD4及CD8分子.然而在长期进     

The effect of Fufangkushen on gastric cancer cell killing by lines SGC-7901 human γδT cell

Objective To explore the effect of Fufangkushen on gastric cancer cell killing by human γδT cells. Methods Isopentenyl pyrophosphate method was used to amplify human peripheral blood γδT cells in vitro. Fufangkushen at various concentrations was used to induce γδT cells and gastric cancer cell lines SGC-7901 for 24 hours, MTr assays was used to detect inhibitory effect of Fufangkushen on these cell lines, LDH assays was used to measure the cytotoxic activity of γδT cells, and flow cytometry was used to detect apoptosis of γδT cells and SGC-7901 before and after the treatment. Results Ten days after cultivation, proliferation ra-tio of γδT cells increased from 4.21% to 70.35% and CD44 was up to 94.0%. Inhibitory rate of Fufangkush-en on SGC-7901 at various concentrations was significantly higher than that on γδT cells (22.3% vs-22.4%, P<0.05). The negative inhibitory ratio on γδT cells showed a dose-dependent manner with Fufangkushen's concentrations ranging from 1/5 to 1/400. γδT cells cytotoxic activity to SGC-7901 induced by Fufangkushen for 24 h was higher than control group, (83.6% vs 71.2%, P<0.05). Apoptotic rate was significantly lower in γδT cells than in SGC-7901 (4.64% vs49.23%, P<0.05). Conclusion Fufangkushen, within routine concentration ranges, can promote γδT cells' proliferation, inhibit tumor cell growth and enhance γδT cells' cytotoxic activity. This may be beneficial to tumor adoptive immunotherapy and provide evidence for the appli-cation of Fufangkushen in the treatment of tumors.     

The effect of Fufangkushen on gastric cancer cell killing by lines SGC-7901 human γδT cell

Objective To explore the effect of Fufangkushen on gastric cancer cell killing by human γδT cells. Methods Isopentenyl pyrophosphate method was used to amplify human peripheral blood γδT cells in vitro. Fufangkushen at various concentrations was used to induce γδT cells and gastric cancer cell lines SGC-7901 for 24 hours, MTr assays was used to detect inhibitory effect of Fufangkushen on these cell lines, LDH assays was used to measure the cytotoxic activity of γδT cells, and flow cytometry was used to detect apoptosis of γδT cells and SGC-7901 before and after the treatment. Results Ten days after cultivation, proliferation ra-tio of γδT cells increased from 4.21% to 70.35% and CD44 was up to 94.0%. Inhibitory rate of Fufangkush-en on SGC-7901 at various concentrations was significantly higher than that on γδT cells (22.3% vs-22.4%, P<0.05). The negative inhibitory ratio on γδT cells showed a dose-dependent manner with Fufangkushen's concentrations ranging from 1/5 to 1/400. γδT cells cytotoxic activity to SGC-7901 induced by Fufangkushen for 24 h was higher than control group, (83.6% vs 71.2%, P<0.05). Apoptotic rate was significantly lower in γδT cells than in SGC-7901 (4.64% vs49.23%, P<0.05). Conclusion Fufangkushen, within routine concentration ranges, can promote γδT cells' proliferation, inhibit tumor cell growth and enhance γδT cells' cytotoxic activity. This may be beneficial to tumor adoptive immunotherapy and provide evidence for the appli-cation of Fufangkushen in the treatment of tumors.     

The effect of Fufangkushen on gastric cancer cell killing by lines SGC-7901 human γδT cell

Objective To explore the effect of Fufangkushen on gastric cancer cell killing by human γδT cells. Methods Isopentenyl pyrophosphate method was used to amplify human peripheral blood γδT cells in vitro. Fufangkushen at various concentrations was used to induce γδT cells and gastric cancer cell lines SGC-7901 for 24 hours, MTr assays was used to detect inhibitory effect of Fufangkushen on these cell lines, LDH assays was used to measure the cytotoxic activity of γδT cells, and flow cytometry was used to detect apoptosis of γδT cells and SGC-7901 before and after the treatment. Results Ten days after cultivation, proliferation ra-tio of γδT cells increased from 4.21% to 70.35% and CD44 was up to 94.0%. Inhibitory rate of Fufangkush-en on SGC-7901 at various concentrations was significantly higher than that on γδT cells (22.3% vs-22.4%, P<0.05). The negative inhibitory ratio on γδT cells showed a dose-dependent manner with Fufangkushen's concentrations ranging from 1/5 to 1/400. γδT cells cytotoxic activity to SGC-7901 induced by Fufangkushen for 24 h was higher than control group, (83.6% vs 71.2%, P<0.05). Apoptotic rate was significantly lower in γδT cells than in SGC-7901 (4.64% vs49.23%, P<0.05). Conclusion Fufangkushen, within routine concentration ranges, can promote γδT cells' proliferation, inhibit tumor cell growth and enhance γδT cells' cytotoxic activity. This may be beneficial to tumor adoptive immunotherapy and provide evidence for the appli-cation of Fufangkushen in the treatment of tumors.     

The effect of Fufangkushen on gastric cancer cell killing by lines SGC-7901 human γδT cell

Objective To explore the effect of Fufangkushen on gastric cancer cell killing by human γδT cells. Methods Isopentenyl pyrophosphate method was used to amplify human peripheral blood γδT cells in vitro. Fufangkushen at various concentrations was used to induce γδT cells and gastric cancer cell lines SGC-7901 for 24 hours, MTr assays was used to detect inhibitory effect of Fufangkushen on these cell lines, LDH assays was used to measure the cytotoxic activity of γδT cells, and flow cytometry was used to detect apoptosis of γδT cells and SGC-7901 before and after the treatment. Results Ten days after cultivation, proliferation ra-tio of γδT cells increased from 4.21% to 70.35% and CD44 was up to 94.0%. Inhibitory rate of Fufangkush-en on SGC-7901 at various concentrations was significantly higher than that on γδT cells (22.3% vs-22.4%, P<0.05). The negative inhibitory ratio on γδT cells showed a dose-dependent manner with Fufangkushen's concentrations ranging from 1/5 to 1/400. γδT cells cytotoxic activity to SGC-7901 induced by Fufangkushen for 24 h was higher than control group, (83.6% vs 71.2%, P<0.05). Apoptotic rate was significantly lower in γδT cells than in SGC-7901 (4.64% vs49.23%, P<0.05). Conclusion Fufangkushen, within routine concentration ranges, can promote γδT cells' proliferation, inhibit tumor cell growth and enhance γδT cells' cytotoxic activity. This may be beneficial to tumor adoptive immunotherapy and provide evidence for the appli-cation of Fufangkushen in the treatment of tumors.     

The effect of Fufangkushen on gastric cancer cell killing by lines SGC-7901 human γδT cell

Objective To explore the effect of Fufangkushen on gastric cancer cell killing by human γδT cells. Methods Isopentenyl pyrophosphate method was used to amplify human peripheral blood γδT cells in vitro. Fufangkushen at various concentrations was used to induce γδT cells and gastric cancer cell lines SGC-7901 for 24 hours, MTr assays was used to detect inhibitory effect of Fufangkushen on these cell lines, LDH assays was used to measure the cytotoxic activity of γδT cells, and flow cytometry was used to detect apoptosis of γδT cells and SGC-7901 before and after the treatment. Results Ten days after cultivation, proliferation ra-tio of γδT cells increased from 4.21% to 70.35% and CD44 was up to 94.0%. Inhibitory rate of Fufangkush-en on SGC-7901 at various concentrations was significantly higher than that on γδT cells (22.3% vs-22.4%, P<0.05). The negative inhibitory ratio on γδT cells showed a dose-dependent manner with Fufangkushen's concentrations ranging from 1/5 to 1/400. γδT cells cytotoxic activity to SGC-7901 induced by Fufangkushen for 24 h was higher than control group, (83.6% vs 71.2%, P<0.05). Apoptotic rate was significantly lower in γδT cells than in SGC-7901 (4.64% vs49.23%, P<0.05). Conclusion Fufangkushen, within routine concentration ranges, can promote γδT cells' proliferation, inhibit tumor cell growth and enhance γδT cells' cytotoxic activity. This may be beneficial to tumor adoptive immunotherapy and provide evidence for the appli-cation of Fufangkushen in the treatment of tumors.     

The effect of Fufangkushen on gastric cancer cell killing by lines SGC-7901 human γδT cell

Objective To explore the effect of Fufangkushen on gastric cancer cell killing by human γδT cells. Methods Isopentenyl pyrophosphate method was used to amplify human peripheral blood γδT cells in vitro. Fufangkushen at various concentrations was used to induce γδT cells and gastric cancer cell lines SGC-7901 for 24 hours, MTr assays was used to detect inhibitory effect of Fufangkushen on these cell lines, LDH assays was used to measure the cytotoxic activity of γδT cells, and flow cytometry was used to detect apoptosis of γδT cells and SGC-7901 before and after the treatment. Results Ten days after cultivation, proliferation ra-tio of γδT cells increased from 4.21% to 70.35% and CD44 was up to 94.0%. Inhibitory rate of Fufangkush-en on SGC-7901 at various concentrations was significantly higher than that on γδT cells (22.3% vs-22.4%, P<0.05). The negative inhibitory ratio on γδT cells showed a dose-dependent manner with Fufangkushen's concentrations ranging from 1/5 to 1/400. γδT cells cytotoxic activity to SGC-7901 induced by Fufangkushen for 24 h was higher than control group, (83.6% vs 71.2%, P<0.05). Apoptotic rate was significantly lower in γδT cells than in SGC-7901 (4.64% vs49.23%, P<0.05). Conclusion Fufangkushen, within routine concentration ranges, can promote γδT cells' proliferation, inhibit tumor cell growth and enhance γδT cells' cytotoxic activity. This may be beneficial to tumor adoptive immunotherapy and provide evidence for the appli-cation of Fufangkushen in the treatment of tumors.     

The effect of Fufangkushen on gastric cancer cell killing by lines SGC-7901 human γδT cell

Objective To explore the effect of Fufangkushen on gastric cancer cell killing by human γδT cells. Methods Isopentenyl pyrophosphate method was used to amplify human peripheral blood γδT cells in vitro. Fufangkushen at various concentrations was used to induce γδT cells and gastric cancer cell lines SGC-7901 for 24 hours, MTr assays was used to detect inhibitory effect of Fufangkushen on these cell lines, LDH assays was used to measure the cytotoxic activity of γδT cells, and flow cytometry was used to detect apoptosis of γδT cells and SGC-7901 before and after the treatment. Results Ten days after cultivation, proliferation ra-tio of γδT cells increased from 4.21% to 70.35% and CD44 was up to 94.0%. Inhibitory rate of Fufangkush-en on SGC-7901 at various concentrations was significantly higher than that on γδT cells (22.3% vs-22.4%, P<0.05). The negative inhibitory ratio on γδT cells showed a dose-dependent manner with Fufangkushen's concentrations ranging from 1/5 to 1/400. γδT cells cytotoxic activity to SGC-7901 induced by Fufangkushen for 24 h was higher than control group, (83.6% vs 71.2%, P<0.05). Apoptotic rate was significantly lower in γδT cells than in SGC-7901 (4.64% vs49.23%, P<0.05). Conclusion Fufangkushen, within routine concentration ranges, can promote γδT cells' proliferation, inhibit tumor cell growth and enhance γδT cells' cytotoxic activity. This may be beneficial to tumor adoptive immunotherapy and provide evidence for the appli-cation of Fufangkushen in the treatment of tumors.     

The effect of Fufangkushen on gastric cancer cell killing by lines SGC-7901 human γδT cell

Objective To explore the effect of Fufangkushen on gastric cancer cell killing by human γδT cells. Methods Isopentenyl pyrophosphate method was used to amplify human peripheral blood γδT cells in vitro. Fufangkushen at various concentrations was used to induce γδT cells and gastric cancer cell lines SGC-7901 for 24 hours, MTr assays was used to detect inhibitory effect of Fufangkushen on these cell lines, LDH assays was used to measure the cytotoxic activity of γδT cells, and flow cytometry was used to detect apoptosis of γδT cells and SGC-7901 before and after the treatment. Results Ten days after cultivation, proliferation ra-tio of γδT cells increased from 4.21% to 70.35% and CD44 was up to 94.0%. Inhibitory rate of Fufangkush-en on SGC-7901 at various concentrations was significantly higher than that on γδT cells (22.3% vs-22.4%, P<0.05). The negative inhibitory ratio on γδT cells showed a dose-dependent manner with Fufangkushen's concentrations ranging from 1/5 to 1/400. γδT cells cytotoxic activity to SGC-7901 induced by Fufangkushen for 24 h was higher than control group, (83.6% vs 71.2%, P<0.05). Apoptotic rate was significantly lower in γδT cells than in SGC-7901 (4.64% vs49.23%, P<0.05). Conclusion Fufangkushen, within routine concentration ranges, can promote γδT cells' proliferation, inhibit tumor cell growth and enhance γδT cells' cytotoxic activity. This may be beneficial to tumor adoptive immunotherapy and provide evidence for the appli-cation of Fufangkushen in the treatment of tumors.     

The effect of Fufangkushen on gastric cancer cell killing by lines SGC-7901 human γδT cell

Objective To explore the effect of Fufangkushen on gastric cancer cell killing by human γδT cells. Methods Isopentenyl pyrophosphate method was used to amplify human peripheral blood γδT cells in vitro. Fufangkushen at various concentrations was used to induce γδT cells and gastric cancer cell lines SGC-7901 for 24 hours, MTr assays was used to detect inhibitory effect of Fufangkushen on these cell lines, LDH assays was used to measure the cytotoxic activity of γδT cells, and flow cytometry was used to detect apoptosis of γδT cells and SGC-7901 before and after the treatment. Results Ten days after cultivation, proliferation ra-tio of γδT cells increased from 4.21% to 70.35% and CD44 was up to 94.0%. Inhibitory rate of Fufangkush-en on SGC-7901 at various concentrations was significantly higher than that on γδT cells (22.3% vs-22.4%, P<0.05). The negative inhibitory ratio on γδT cells showed a dose-dependent manner with Fufangkushen's concentrations ranging from 1/5 to 1/400. γδT cells cytotoxic activity to SGC-7901 induced by Fufangkushen for 24 h was higher than control group, (83.6% vs 71.2%, P<0.05). Apoptotic rate was significantly lower in γδT cells than in SGC-7901 (4.64% vs49.23%, P<0.05). Conclusion Fufangkushen, within routine concentration ranges, can promote γδT cells' proliferation, inhibit tumor cell growth and enhance γδT cells' cytotoxic activity. This may be beneficial to tumor adoptive immunotherapy and provide evidence for the appli-cation of Fufangkushen in the treatment of tumors.     

Ⅰ型IFN体外增强人γδT细胞对骨肉瘤的杀伤作用

目的:探讨Ⅰ型干扰素(IFN)对人来源γδT细胞杀伤骨肉瘤作用的影响。方法:取健康人和骨肉瘤患者外周血来源的单个核细胞,分别使用唑来膦酸(Zol)、Zol和Ⅰ型IFN体外刺激扩增,流式细胞技术检测γδT细胞的纯度,计算扩增倍数。以Zol刺激体外扩增的γδT细胞为对照组,Zol联合Ⅰ型IFN刺激体外扩增的γδT细胞为实验组,LDH法检测不同方法扩增的γδT细胞的细胞毒活性,ELISA法检测γδT细胞分泌的IFN-γ。结果:Zol、Zol联合Ⅰ型IFN均可高度选择性扩增健康人和骨肉瘤患者外周血单核细胞中的γδT细胞,扩增后γδT细胞具有杀伤骨肉瘤细胞的能力。Ⅰ型IFN预处理γδT细胞后可显著增强γδT细胞的杀伤活性。结论:Ⅰ型IFN能够促进人γδT细胞的抗骨肉瘤作用。