摘要
目的 探讨白藜芦醇(Res)在同型半胱氨酸(Hcy)引起巨噬细胞免疫应答和增殖中的作用.方法 将小鼠ANA-1细胞分为对照组(常规培养)、模型组(100 μmol·L-1Hcy)和低、中、高剂量实验组(在模型组基础上分别加25、50和100 μmol·L-1 白藜芦醇)以及 Hcy+Ad-SIRT1 组(100 µmol·L-1 Hcy+Ad-SIRT1)、Hcy+si-FOX01 组(100 μmol·L-1 Hcy+si-FOXO1)、Hcy+Res-L+Ad-SIRT1+si-FOXO1组(100 μmol·L-1 Hcy+25 μmol·L-1 白藜芦醇+转染Ad-SIRT1+si-FOXO1).用四甲基偶氮唑蓝(MTT)法检测细胞增殖,用酶联免疫吸附法检测细胞培养液上清液中白细胞介素-6(IL-6)和肿瘤坏死因子-α(TNF-α)的浓度.用蛋白质印迹法检测沉默信息调节因子(SIRT1)和叉头蛋白01(FOXO1)蛋白的表达水平.结果 对照组、模型组和低、中、高剂量实验组450 nm光密度值分别为0.25±0.02、0.36±0.02、0.33±0.01、0.30±0.02和0.29±0.01,模型组较对照组细胞增殖显著增加,低、中、高剂量实验组细胞增殖较模型组均显著减少(均P＜0.05);对照组、模型组、低剂量实验组细胞培养液上清液中IL-6分别为(394.04±20.06)、(614.23±21.09)和(501.53±16.52)pg·mL-1,TNF-α 分别为(516.54±18.96)、(717.22±24.81)和(632.74±19.11)pg·mL-1,SIRT1 蛋白相对表达水平分别 1.00±0.05、0.57±0.05和0.77±0.04,FOXO1蛋白相对表达水平分别为1.00±0.05、2.31±0.18和1.58±0.11,低剂量实验组的上述指标与对照组比较,在统计学上差异均有统计学意义(均P＜0.05).模型组、低剂量实验组、Hcy+Ad-SIRT1组及Hcy+si-FOX01组细胞培养液上清液IL-6和TNF-α含量均显著低于模型组,在统计学上差异有统计学意义(均P＜0.05);低剂量实验组共转染Ad-SIRT1和si-FOXO1后,细胞培养液上清液IL-6和TNF-α含量均显著低于Ad-SIRT 1组和si-FOXO1组(均P＜0.05).结论 白藜芦醇能够减轻Hcy引起的巨噬细胞免疫应答和增殖,其机制与SIRT1/FOXO1通路有关.
Abstract
Objective To explore the role of resveratrol in the immune response and proliferation of macrophages induced by homocysteine(Hcy).Methods ANA-1 cells were divided into control group(conventional culture),model group(100 μmol·L-1 Hcy),experimental-L,-M,-H groups(adding 25,50 and 100 µmol·L-1 resveratrol to model group,respectively),Hcy+Ad-SIRT1 group(100 μmol·L-1 Hcy+Ad-SIRT1),Hcy+si-FOXO1 group(100 μmol·L-1 Hcy+si-FOXO1),Hcy+Res-L+Ad-SIRT1+si-FOXO1 group(100 μmol·L-1 Hcy+25 μmol·L-1 Resveratrol transfected with Ad-SIRT1+si-FOXO1).The cell proliferation was detected by methyl thiazolyl tetrazolium(MTT),and the concentration of interleukin-6(IL-6)and tumor necrosis factor-α(TNF-α)in the supernatant of cell culture medium was detected by enzyme-linked immunosorbent assay.The gene and protein expression of silencing information regulator 1(SIRT1)and forkhead protein 01(FOXO1)were detected by Western blot.Results The optical density of 450 nm in control group,model group and experimental-L,-M,-H groups were 0.25±0.02,0.36±0.02,0.33±0.01,0.30±0.02 and 0.29±0.01,respectively.Compared with the control group,the cell proliferation in the model group was significantly increased(P＜0.05).Cell proliferation in experimental-L,-M,-H groups was significantly decreased compared with model group(all P＜0.05).IL-6 in the supernatant of cell culture medium of control group,model group and experimental-L group were(394.04±20.06),(614.23±21.09)and(501.53±16.52)pg·mL-1,respectively;TNF-α were(516.54±18.96),(717.22±24.81)and(632.74±19.11)pg·mL-1,respectively;SIRT1 relative protein expression were(1.00±0.05),(0.57±0.05)and(0.77±0.04),respectively;the relative protein expression of FOXO1 were 1.00±0.05,2.31±0.18 and 1.58±0.11,respectively.Compared with the control group,the above indexes in the experimental-L group had statistical significance(all P＜0.05).The contents of IL-6 and TNF-α in cell culture fluid supernatant in model group,experimental-L group,Hcy+Ad-SIRT1 group and Hcy+si-FOXO1 group were significantly lower than those in model group,with statistical significance(all P＜0.05).After co-transfection with Ad-SIRT1 and si-FOXO1,the contents of IL-6 and TNF-α in cell culture medium superserum of experimental-L group were significantly lower than those of Ad-SIRT1 group and si-FOXO1 group(all P＜0.05).Conclusion Resveratrol can attenuate the immune response and proliferation of macrophages induced by Hcy,which may be related to the alteration of SIRT1/FOXO1 pathway.
基金项目
国家自然科学基金资助项目(81960063)
宁夏自然科学基金资助项目(2022AAC03765)
宁夏自然科学基金资助项目(2021AAC02012)
国家科技期刊平台
NSTL
万方数据