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1.山东中医药大学 附属医院,济南 250014
2.山东中医药大学,济南 250355
3.山东中医药大学 第二附属医院,济南 250001
孙海鹏,硕士,从事肺癌、膀胱癌中西医结合诊疗,E-mail:675357159@qq.com
刘思远,博士,讲师,从事肺癌及肺纤维化的中西医结合诊断与治疗,E-mail:happysiyuan1@163.com
收稿日期:2021-06-17,
网络出版日期:2021-07-30,
纸质出版日期:2021-10-05
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孙海鹏,马山,庄贺等.黄芪-白花蛇舌草抑制肺癌A549细胞增殖机制[J].中国实验方剂学杂志,2021,27(19):28-35.
SUN Hai-peng,MA Shan,ZHUANG He,et al.Mechanism of Scutellariae Radix-Hedyotidis Herba Against Proliferation of Lung Adenocarcinoma A549 Cells[J].Chinese Journal of Experimental Traditional Medical Formulae,2021,27(19):28-35.
孙海鹏,马山,庄贺等.黄芪-白花蛇舌草抑制肺癌A549细胞增殖机制[J].中国实验方剂学杂志,2021,27(19):28-35. DOI: 10.13422/j.cnki.syfjx.20211922.
SUN Hai-peng,MA Shan,ZHUANG He,et al.Mechanism of Scutellariae Radix-Hedyotidis Herba Against Proliferation of Lung Adenocarcinoma A549 Cells[J].Chinese Journal of Experimental Traditional Medical Formulae,2021,27(19):28-35. DOI: 10.13422/j.cnki.syfjx.20211922.
目的
2
从细胞水平观察黄芪-白花蛇舌草对人肺腺癌A549细胞增殖及白细胞介素-6(IL-6),磷脂酰肌醇3-激酶(PI3K),蛋白激酶B(Akt),磷酸化蛋白激酶B(p-Akt),雷帕霉素靶蛋白(mTOR),缺氧诱导因子-1
α
(HIF-1
α
),细胞周期蛋白D
1
(Cyclin D
1
)表达量的影响,并探讨其作用的分子机制。
方法
2
设立空白组(完全培养基),黄芪-白花蛇舌草低、中、高质量浓度组(20,40,60 mg·L
-1
),顺铂低、中、高质量浓度组(5,10,20 mg·L
-1
),采用噻唑蓝(MTT)比色法检测黄芪-白花蛇舌草(0,20,40,60 mg·L
-1
)和顺铂(0,5,10,20 mg·L
-1
)干预A549细胞24,48,72 h后的细胞活性,计算各组细胞增殖能力,筛选出各药物组最佳浓度;分别用完全培养基,黄芪-白花蛇舌草(40 mg·L
-1
),顺铂(10 mg·L
-1
),联合药物(40 mg·L
-1
+10 mg·L
-1
)干预肺腺癌A549细胞,设置为空白组、黄芪-白花蛇舌草组、顺铂组、联合组,计算各组在24,48,72 h后对A549细胞增殖抑制影响;采用酶联免疫吸附测定(ELISA)检测各组72 h后细胞培养上清中IL-6的水平;实时荧光定量聚合酶链式反应(Real-time PCR)检测HIF-1
α
,Cyclin D
1
mRNA水平;蛋白免疫印迹法(Western blot)检测各组蛋白PI3K,Akt,p-Akt,mTOR,HIF-1
α
,Cyclin D
1
表达的变化情况。
结果
2
在作用细胞24 h后,各黄芪-白花蛇舌草组对细胞增殖未表现出明显抑制,作用48 h,与空白组比较,黄芪-白花蛇舌草组对肿瘤细胞有明显增殖抑制作用(
P
<
0.05),表现出时间依赖性,在作用细胞72 h,黄芪-白花蛇舌草各浓度组未表现出明显差异,故选用40 mg·L
-1
为中药最佳浓度组,用于后续实验。与空白组比较,经过不同浓度顺铂干预后,细胞增殖均受到不同程度抑制(
P
<
0.05),表现出明显的时间依赖性,基于细胞存活率考虑,选用顺铂10 mg·L
-1
为最佳浓度。与空白组比较,黄芪-白花蛇舌草与顺铂联合应用明显抑制肺腺癌A549细胞增殖,增殖抑制率表现出明显的时间依赖性(
P
<
0.05),且药物作用72 h,联合组与其他两组比较差异更加显著(
P
<
0.01);与空白组比较,各用药组细胞培养液IL-6分泌显著降低(
P
<
0.01),以联合组下降更加突出。与空白组比较,黄芪-白花蛇舌草、顺铂均能降低HIF-1
α
,Cyclin D
1
mRNA水平(
P
<
0.05,
P
<
0.01),且联合用药降低幅度更加明显;各用药组PI3K,p-Akt,mTOR,HIF-1
α
,Cyclin D
1
蛋白均明显降低(
P
<
0.05,
P
<
0.01),且联合组各蛋白表达量明显低于顺铂组(
P
<
0.01)。
结论
2
黄芪-白花蛇舌草对肺癌A549细胞增殖具有抑制作用,潜在机制可能与其抑制IL-6/PI3K/Akt/mTOR-HIF-1
α
轴的表达与分泌有关。
Objective
2
To observe the effects of Scutellariae Radix-Hedyotidis Herba on the proliferation of human lung adenocarcinoma A549 cells and the expression of interleukin-6(IL-6), phosphatidylinositol 3-kinase (PI3K),protein kinase B (Akt), p-protein kinase B (p-Akt), mechanistic target of rapamycin (mTOR), hypoxia-inducible factor-1
α
(HIF-1
α
), and Cyclin D
1
at the cellular level, and to explore their molecular mechanism.
Method
2
Following the set-up of the blank group (complete medium), low-, moderate-,and high-dose (20, 40, and 60 mg·L
-1
) Scutellariae Radix-Hedyotidis Herba groups, and low-, moderate-, and high-dose (5, 10, and 20 mg·L
-1
) cisplatin groups, the cell were treated with the corresponding drugs for 24, 48, and 72 h for detecting their viability by tetrazolium bromide (MTT) colorimetry. A549 cells were then divided into the blank group, Scutellariae Radix-Hedyotidis Herba group, cisplatin group, and combined medication group and intervened with the
complete medium, 40 mg·L
-1
Scutellariae Radix-Hedyotidis Herba, 10 mg·L
-1
cisplatin, and 40 mg·L
-1
Scutellariae Radix-Hedyotidis Herba + 10 mg·L
-1
cisplatin, respectively, for 24, 48 and 72 h, followed by the measurement of inhibitory effects against the proliferation of A549 cells in each experimental group. The level of IL-6 in cell culture supernatant was determined by enzyme-linked immunosorbent assay (ELISA) after 72 h. The mRNA expression levels of HIF-1
α
and Cyclin D
1
in each group were assayed by real-time polymerase chain reaction (Real-time PCR), and the protein expression levels of PI3K, Akt, p-Akt, mTOR, HIF-1
α
, and Cyclin D
1
by Western blot.
Result
2
After 24 h intervention, Scutellariae Radix-Hedyotidis Herba did not significantly inhibit the proliferation of A549 cells. However, 48 h later, the inhibitory effect in Scutellariae Radix-Hedyotidis Herba groups were significantly enhanced in comparison with that in the blank group (
P
<
0.05), exhibiting a time-dependent response. After 72 h of action, no significant change was present in the inhibitory effect of each Scutellariae Radix-Hedyotidis Herba group, so the optimal concentration of Scutellariae Radix-Hedyotidis Herba was set at 40 mg·L
-1
for follow-up experiments. As demonstrated by the comparison with the blank group, cisplatin at each concentration inhibited the cell proliferation in a time-dependent manner (
P<
0.05). Considering the cell survival rate, the best concentration of cisplatin was set at 10 mg·L
-1
. Compared with the blank group, Scutellariae Radix-Hedyotidis Herba combined with cisplatin remarkably inhibited the proliferation of A549 cells in a time-dependent manner (
P<
0.05), and the differences between the combined medication group and the other two groups became more significant after 72 h of medication (
P<
0.01). The IL-6 level in each experimental group, especially in the combined medication group, significantly declined in contrast to that in the blank group (
P<
0.01). The mRNA expression levels of HIF-1
α
and Cyclin D
1
in all experimental groups were obviously lower than those in the blank group, with the most significant changes observed in the combined medication group (
P
<
0.05,
P
<
0.01). The protein expression levels of PI3K, p-Akt, mTOR, HIF-1
α
, and Cyclin D
1
in each experimental group was significantly down-regulated(
P
<
0.05,
P
<
0.01), and the levels in the combined medication group were even lower than those in the cisplatin group (
P<
0.01).
Conclusion
2
Scutellariae Radix-Hedyotidis Herba has an inhibitory effect on the proliferation of A549 cells, which may be related to its inhibition against the expression and secretion of IL-6/PI3K/Akt/mTOR-HIF-1
α
axis.
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