目的:观察注射Hepal-6细胞热休克后裂解蛋白致敏的骨髓来源树突状细胞(bone marrowderived dendritic cells,BMDCs)瘤苗对小鼠肝细胞癌(hepatocellular carcinoma,HCC)瘤内CD25+叉头盒转录因子P3(forkhead box p3,Foxp3)+调节T淋巴细胞(...目的:观察注射Hepal-6细胞热休克后裂解蛋白致敏的骨髓来源树突状细胞(bone marrowderived dendritic cells,BMDCs)瘤苗对小鼠肝细胞癌(hepatocellular carcinoma,HCC)瘤内CD25+叉头盒转录因子P3(forkhead box p3,Foxp3)+调节T淋巴细胞(regulatory T cells,Tregs)浸润的影响.方法:在粒细胞-巨噬细胞集落刺激因子(granulocyte-macrophage colony stimulatingfactor,GM-CSF)和白介素-4(interleukin-4,IL-4)诱导下体外扩增BMDCs,使用Hepal-6细胞热休克后裂解蛋白体外致敏BMDCs制备瘤苗,荧光免疫化学染色和FACS检测致敏前后BMDCs CD11c、CCR7、CD80和CD86的表达变化.使用Hepal-6细胞皮下注射的方法制备小鼠(C57BL/6J)HCC模型,成瘤小鼠分组注射Hepal-6细胞热休克后裂解蛋白致敏的BMDCs瘤苗(足垫部和瘤内,每7 d注射1次,共2次),并另设对照(空白对照组、BMDCs组和Hepal-6细胞裂解蛋白组).在治疗结束后9 d获取组织标本,免疫荧光组织化学染色和FACS检测瘤苗注射后肿瘤内CD8+T细胞和CD25+Foxp3+Tregs细胞的浸润情况.结果:光镜和扫描电镜显示:GM-CSF和IL-4在体外诱导扩增的BMDCs具有树突状细胞特征性的形态特征,且免疫细胞化学染色显示:该细胞表达CD11c,CCR7,CD80和CD86.使用Hepal-6细胞热休克后裂解蛋白致敏的BMDCs组,与对照组(BMDCs组和Hepal-6细胞裂解蛋白组)相比该组细胞CD11c(67.2±4.49 vs 52.4±5.20,58.4±4.43,P<0.01),CCR7(65.4±5.34 vs 45.9±5.04,57.0±3.46,P<0.01),CD80(62.9±4.69 vs 46.9±4.75,54.4±3.47,P<0.01)和CD86(73.3±3.58 vs 60.1±2.98,63.7±3.10,P<0.01)的表达均明显增高.使用Hepal-6细胞热休克后裂解蛋白致敏的BMDCs瘤苗为HCC荷瘤小鼠进行注射治疗,治疗后的检测结果显示:该组小鼠瘤内CD8+T细胞的浸润明显高于对照组(空白对照组、BMDCs组和Hepal-6细胞裂解蛋白组)(55.0±4.11 vs 38.2±3.34,44.6±4.29,45.6±4.92,P<0.01),而同时瘤内CD25+Foxp3+Tregs细胞的浸润则明显低于相应对照组(0.37±0.028 vs 1.31±0.020,0.77±0.057,0.57±0.062,P<0.05).结论:使用Hepal-6细胞热休克后裂解蛋白致敏的BMDCs瘤苗进行治疗,可增强HCC小鼠瘤内CD8+T细胞的浸润,并同时减少CD25+Foxp3+Tregs细胞的浸润,该瘤苗具有抗肿瘤免疫效果.展开更多
AIM： To investigate the regulation of activin receptor-interacting protein 2 （ARIP2） expression and its possible relationships with collagen type Ⅳ （collagen Ⅳ） in mouse hepatoma cell line Hepal-6 cells. METHOD...AIM： To investigate the regulation of activin receptor-interacting protein 2 （ARIP2） expression and its possible relationships with collagen type Ⅳ （collagen Ⅳ） in mouse hepatoma cell line Hepal-6 cells. METHODS： The ARIP2 mRNA expression kinetics in Hepal-6 cells was detected by RT-PCR, and its regulation factors were analyzed by treatment with signal transduction activators such as phorbol 12-myristate 13-acetate （PMA）, forskolin and A23187. After pcDNA3- ARIP2 was transfected into Hepal-6 cells, the effects of ARIP2 overexpression on activin type Ⅱ receptor （ActRⅡ） and collagen Ⅳ expression were evaluated. RESULTS： The expression levels of ARIP2 mRNA in Hapel-6 cells were elevated in time-dependent manner 12 h after treatment with activin A and endotoxin LPS, but not changed evidently in the early stage of stimulation （2 or 4 h）. The ARIP2 mRNA expression was increased after stimulated with signal transduction activators such as PMA and forskolin in Hepal-6 cells, whereas decreased after treatment with A23187 （25.3% ± 5.7% vs 48.1% ± 3.6%, P 〈 0.01）. ARIP2 overexpression could remarkably suppress the expression of ActRⅡA mRNA in dose-dependent manner, but has no effect on ActRⅡB in Hepal-6 cells induced by activin A. Furthermore, we have found that overexpression of ARIP2 could inhibit collagen Ⅳ mRNA and protein expressions induced by activin A in Hapel-6 cells. CONCLUSION： These findings suggest that ARIP2 expression can be influenced by various factors. ARIP2 may participate in the negative feedback regulation of signal transduction in the late stage by affecting the expression of ActRIIA and play an important role in regulation of development of liver fibrosis induced by activin.展开更多
文摘目的:观察注射Hepal-6细胞热休克后裂解蛋白致敏的骨髓来源树突状细胞(bone marrowderived dendritic cells,BMDCs)瘤苗对小鼠肝细胞癌(hepatocellular carcinoma,HCC)瘤内CD25+叉头盒转录因子P3(forkhead box p3,Foxp3)+调节T淋巴细胞(regulatory T cells,Tregs)浸润的影响.方法:在粒细胞-巨噬细胞集落刺激因子(granulocyte-macrophage colony stimulatingfactor,GM-CSF)和白介素-4(interleukin-4,IL-4)诱导下体外扩增BMDCs,使用Hepal-6细胞热休克后裂解蛋白体外致敏BMDCs制备瘤苗,荧光免疫化学染色和FACS检测致敏前后BMDCs CD11c、CCR7、CD80和CD86的表达变化.使用Hepal-6细胞皮下注射的方法制备小鼠(C57BL/6J)HCC模型,成瘤小鼠分组注射Hepal-6细胞热休克后裂解蛋白致敏的BMDCs瘤苗(足垫部和瘤内,每7 d注射1次,共2次),并另设对照(空白对照组、BMDCs组和Hepal-6细胞裂解蛋白组).在治疗结束后9 d获取组织标本,免疫荧光组织化学染色和FACS检测瘤苗注射后肿瘤内CD8+T细胞和CD25+Foxp3+Tregs细胞的浸润情况.结果:光镜和扫描电镜显示:GM-CSF和IL-4在体外诱导扩增的BMDCs具有树突状细胞特征性的形态特征,且免疫细胞化学染色显示:该细胞表达CD11c,CCR7,CD80和CD86.使用Hepal-6细胞热休克后裂解蛋白致敏的BMDCs组,与对照组(BMDCs组和Hepal-6细胞裂解蛋白组)相比该组细胞CD11c(67.2±4.49 vs 52.4±5.20,58.4±4.43,P<0.01),CCR7(65.4±5.34 vs 45.9±5.04,57.0±3.46,P<0.01),CD80(62.9±4.69 vs 46.9±4.75,54.4±3.47,P<0.01)和CD86(73.3±3.58 vs 60.1±2.98,63.7±3.10,P<0.01)的表达均明显增高.使用Hepal-6细胞热休克后裂解蛋白致敏的BMDCs瘤苗为HCC荷瘤小鼠进行注射治疗,治疗后的检测结果显示:该组小鼠瘤内CD8+T细胞的浸润明显高于对照组(空白对照组、BMDCs组和Hepal-6细胞裂解蛋白组)(55.0±4.11 vs 38.2±3.34,44.6±4.29,45.6±4.92,P<0.01),而同时瘤内CD25+Foxp3+Tregs细胞的浸润则明显低于相应对照组(0.37±0.028 vs 1.31±0.020,0.77±0.057,0.57±0.062,P<0.05).结论:使用Hepal-6细胞热休克后裂解蛋白致敏的BMDCs瘤苗进行治疗,可增强HCC小鼠瘤内CD8+T细胞的浸润,并同时减少CD25+Foxp3+Tregs细胞的浸润,该瘤苗具有抗肿瘤免疫效果.
基金Supported by the National Natural Science Foundation of China, No. 30170478 and 30571688Science Projects of Jilin Province of China, No. 20060928-01
文摘AIM： To investigate the regulation of activin receptor-interacting protein 2 （ARIP2） expression and its possible relationships with collagen type Ⅳ （collagen Ⅳ） in mouse hepatoma cell line Hepal-6 cells. METHODS： The ARIP2 mRNA expression kinetics in Hepal-6 cells was detected by RT-PCR, and its regulation factors were analyzed by treatment with signal transduction activators such as phorbol 12-myristate 13-acetate （PMA）, forskolin and A23187. After pcDNA3- ARIP2 was transfected into Hepal-6 cells, the effects of ARIP2 overexpression on activin type Ⅱ receptor （ActRⅡ） and collagen Ⅳ expression were evaluated. RESULTS： The expression levels of ARIP2 mRNA in Hapel-6 cells were elevated in time-dependent manner 12 h after treatment with activin A and endotoxin LPS, but not changed evidently in the early stage of stimulation （2 or 4 h）. The ARIP2 mRNA expression was increased after stimulated with signal transduction activators such as PMA and forskolin in Hepal-6 cells, whereas decreased after treatment with A23187 （25.3% ± 5.7% vs 48.1% ± 3.6%, P 〈 0.01）. ARIP2 overexpression could remarkably suppress the expression of ActRⅡA mRNA in dose-dependent manner, but has no effect on ActRⅡB in Hepal-6 cells induced by activin A. Furthermore, we have found that overexpression of ARIP2 could inhibit collagen Ⅳ mRNA and protein expressions induced by activin A in Hapel-6 cells. CONCLUSION： These findings suggest that ARIP2 expression can be influenced by various factors. ARIP2 may participate in the negative feedback regulation of signal transduction in the late stage by affecting the expression of ActRIIA and play an important role in regulation of development of liver fibrosis induced by activin.
文摘目的:探讨激活素受体相互作用蛋白2(ARIP2)在肝细胞内的表达形式及其介导的生物学作用.方法:采用免疫组织化学及细胞化学染色、Western blot检测ARIP2蛋白在小鼠肝组织及肝癌细胞系Hepal-6细胞内的表达;采用激活素特异应答的CAGA-lux报告基因质粒分析ARIP2对激活素诱导的特异基因转录的影响;MTT法检测ARIP2过表达对Hepal-6细胞增殖的彰响.结果:ARIP2蛋白可在小鼠肝组织及Hepal-6细胞表达.激活素A刺激Hepal-6细胞ARIP2蛋白表达呈时间依赖性升高,于24 h达到高峰;12 h、24 h测定值与对照组相比有显著性意义(1.01±0.16,1.62±0.26 vs 0.82±0.11.P<0.05).pcDNA3-ARIP2转染Hepal-6细胞.可以明显抑制激活素诱导的特异基因转录;MTT检测显示激活素A(5μg/L、10μg/L)可以明显抑制Hepal-6细胞增殖,其570 nm吸光度值与对照组相比有显著差异(1.59±0.03、1.49±0.04 vs 1.79±0.07,P<0.05,P<0.01).在Hepal-6细胞内过表达ARIP2可以阻断激活素A对Hepal-6细胞的增殖抑制作用.结论:ARIP2有望成为治疗激活素诱导的肝脏损伤性疾病的基因调控靶点.
