摘要:
Objective To observe the effects of Yiqi Jiedu prescription drug serum on the apoptosis of human renal cell carcinoma ACHN cells and Notch1 gene in Notch signal pathway. Methods The healthy SD female rats were selected, which were divided into 4 groups, 8 rats in each group: the rats were fed with the normal saline 10 ml·kg-1·d-1 (the blank serum group); the rats were fed with the Yiqi Jiedu prescription decoctum of 50 g·kg-1·d-1 (the high-concentration of Yiqi Jiedu prescription serum group); the rats were fed with the Yiqi Jiedu prescription decoctum of 25 g·kg -1·d -1 (the medium-concentration of Yiqi Jiedu prescription serum group); the rats were fed with the Yiqi Jiedu prescription decoctum of 12.5 g·kg-1·d-1 (the low-concentration medicated of Yiqi Jiedu prescription serum group); then the serum would be extracted 10 days later in each group. ACHN cells at exponential phase were cultured in the above 4 groups. Theproliferation of ACHN cells in each group was observed by using CCK-8 method. The apoptosis of ACHN cells was detected by using flow cytometry (FCM). The expression levels of Notch1 mRNA of ACHN cells in each groups were detected by using real time fluorescence quantitative polymerase chain reaction (RT-PCR). Results The inhibition rates of ACHN cells in the high-concentration group, the medium-concentration group, the low-concentration group of Yiqi Jiedu prescription and the blank serum group 24 h later were (12.34±4.25)%, (7.47±1.40)%, (2.52±0.62)%, (1.05±0.31)%, respectively (F= 15.04, P< 0.01); after 48 h, the inhibition rates were (24.20 ±2.41)%, (14.23 ±1.56)%, (5.08 ±1.34)%, (1.16 ±0.14)%, respectively (F=227.36, P<0.01);after 72 h, the inhibition rates were (32.16±2.45)%, (25.05±3.69)%, (10.29±2.76)%, (1.07± 0.71)%, respectively (F=110.51, P<0.01). The results showed that Yiqi Jiedu prescription drug serum could significantly inhibit the proliferation of ACHN cells in a dose-dependent manner. Besides, the inhibition rate differences at all time points of the high-concentration serum group (F= 31.44, P< 0.01), the medium-concentration serum group (F= 49.61, P< 0.01) and the low-concentration serum group (F= 68.78, P<0.01) were all statistically significant, and they were in a time-dependent manner. The apoptosis rate of cells in the high-concentration group, the medium-concentration group, the low-concentration group of Yiqi Jiedu prescription and the control serum group was (34.5±1.5)%, (24.4±1.5)%and (13.1±0.5)%, (5.2±0.3)%, respectively, and the differences were statistically significant (F = 1153.36, P < 0.01). The relative expression level of Notch1 mRNA of cells in the high-concentration group, the medium-concentration group, the low-concentration serum group of Yiqi Jiedu prescription and the control serum group was 0.213 ±0.032, 0.432 ±0.049, 0.781 ±0.018, 1.013 ±0.047, respectively, and the differences were statistically significant (F=270.60, P<0.01). Conclusion Yiqi Jiedu prescription drug serum can induce apoptosis of ACHN cells, and its mechanism may be related to the down-regulation of the expression level of Notch1 receptors.%目的 观察益气解毒方药物血清对人肾细胞癌ACHN细胞凋亡及Notch信号通路中Notch1基因的影响.方法 选择健康雌性SD大鼠,随机分为4组,每组8只:空白血清组(0.9%氯化钠注射液10 ml·kg-1·d-1灌胃),益气解毒方高浓度血清组(益气解毒方煎剂50 g·kg-1·d-1灌胃),益气解毒方中浓度血清组(益气解毒方煎剂25 g·kg-1·d-1灌胃),益气解毒方低浓度血清组(益气解毒方煎剂12.5 g·kg-1·d-1灌胃),均在10 d后提取大鼠血清.取对数生长期的ACHN细胞分别以上述4组血清进行培养,CCK-8法检测各组ACHN细胞的增殖情况,流式细胞术检测各组ACHN细胞的凋亡情况,用实时荧光定量聚合酶链反应(RT-PCR)检测各组ACHN细胞Notch1 mRNA的表达情况.结果益气解毒方高浓度、中浓度、低浓度血清组及空白血清组24 h ACHN细胞的抑制率分别为(12.34±4.25)%、(7.47±1.40)%、(2.52±0.62)%、(1.05±0.31)%(F=15.04,P<0.01),48 h的抑制率分别为(24.20±2.41)%、(14.23±1.56)%、(5.08±1.34)%、(1.16±0.14)%(F=227.36,P<0.01),72 h的抑制率分别为(32.16±2.45)%、(25.05±3.69)%、(10.29±2.76)%、(1.07±0.71)%(F=110.51,P<0.01),同一时间段四组间两两比较,均P<0.01,表明益气解毒方药物血清能够明显抑制ACHN细胞的增殖,呈剂量依赖性;且益气解毒方高浓度(F=31.44,P<0.01)、中浓度(F=49.61,P<0.01)、低浓度血清组(F=68.78,P<0.01)中各时间点的抑制率差异均有统计学意义,呈时间依赖性.益气解毒方高浓度、中浓度、低浓度血清组及空白血清组细胞凋亡率依次为(34.5±1.5)%、(24.4±1.5)%、(13.1±0.5)%、(5.2±0.3)%,差异有统计学意义(F=1153.36,P<0.01);益气解毒方高浓度、中浓度、低浓度血清组及空白血清组Notch1 mRNA相对表达水平分别为0.213±0.032、0.432±0.049、0.781±0.018、1.013±0.047,差异有统计学意义(F=270.60,P<0.01).结论 益气解毒方药物血清可以诱导ACHN细胞凋亡,其机制可能与下调Notch1受体的表达有关.