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1.广州中医药大学,广州 510006
2.广西国际壮医医院,南宁 530021
3.中国中医科学院 中药资源中心,北京 100700
4.广州中医药大学 第一临床医学院,广州 510405
罗颖懿,在读硕士,从事中药创新药物研究与指纹图谱分析,E-mail: 297036535@qq.com
袁媛,研究员,从事中药鉴定与分子生药学研究,Tel:010-64087649,E-mail:y_yuan0732@163.com;
魏刚,研究员,博士生导师,从事中药创新药物研究与指纹图谱分析,石斛类药材规范化研究,Tel:020-39358519,E-mail: weigang021@163.com
收稿日期:2018-05-09,
网络出版日期:2018-08-28,
纸质出版日期:2019-01-05
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罗颖懿, 李运容, 雷胄熙, 等. 铁皮石斛共性黄酮类成分新西兰牡荆苷Ⅱ的体外抗氧化与诱导HepG2细胞凋亡的作用[J]. 中国实验方剂学杂志, 2019,25(1):43-50.
Ying-yi LUO, Yun-rong LI, Zhou-xi LEI, et al. Antioxidation Activities in Vitro of Vicenin Ⅱ Isolated from Dendrobii Officinalis Caulis and Effect on HepG2 Cells[J]. Chinese journal of experimental traditional medical formulae, 2019, 25(1): 43-50.
罗颖懿, 李运容, 雷胄熙, 等. 铁皮石斛共性黄酮类成分新西兰牡荆苷Ⅱ的体外抗氧化与诱导HepG2细胞凋亡的作用[J]. 中国实验方剂学杂志, 2019,25(1):43-50. DOI: 10.13422/j.cnki.syfjx.20182210.
Ying-yi LUO, Yun-rong LI, Zhou-xi LEI, et al. Antioxidation Activities in Vitro of Vicenin Ⅱ Isolated from Dendrobii Officinalis Caulis and Effect on HepG2 Cells[J]. Chinese journal of experimental traditional medical formulae, 2019, 25(1): 43-50. DOI: 10.13422/j.cnki.syfjx.20182210.
目的:
2
对不同道地种源铁皮石斛的共性黄酮类成分新西兰牡荆苷Ⅱ(芹菜素-6,8-二-
C
-葡萄糖苷,vicenin Ⅱ)进行体外抗氧化及诱导肝癌HepG2细胞凋亡的活性研究。
方法:
2
采用2,2-联苯基-1-苦基肼法(DPPH),2-联氨-双-3-乙基苯并噻唑啉-6-磺酸法(ABTS)和铜离子还原法对vicenin Ⅱ(0.005~1 g·L
-1
)进行体外的抗氧化活性研究;采用噻唑蓝(MTT)比色法检测vicenin Ⅱ(12.5~100 μmol·L
-1
)对人6种不同的肿瘤细胞体外的增殖抑制作用;后续凋亡实验vicenin Ⅱ浓度为75 μmol·L
-1
,采用Hoechst33258染色,荧光显微镜进行HepG2细胞形态学观察;应用流式细胞术,磷脂结合蛋白V/碘化丙啶(AnnexinV-FITC/PI)检测HepG2细胞凋亡率;采用实时荧光定量逆转录聚合酶链反应(Real-time PCR)检测丝裂原活化蛋白激酶(MAPK)通路及相关凋亡基因的mRNA表达。
结果:
2
Vicenin Ⅱ质量浓度为1 g·L
-1
时,对DPPH的清除率和Cu
2+
还原率为48.82%和22.01%(
P
<
0.01);当vicenin Ⅱ质量浓度为0.5 g·L
-1
时,对ABTS清除率为86.88%(
P
<
0.01);vicenin Ⅱ 显著抑制HepG2细胞增殖并诱导凋亡,75 μmol·L
-1
的vicenin Ⅱ作用48 h后,细胞存活率为45.69%(
P
<
0.01),细胞凋亡率为14.57%(
P
<
0.01),升高B淋巴细胞瘤-2(Bcl-2)相关X蛋白(Bax)/Bcl-2,半胱氨酸蛋白酶(Caspase)-8,p38,细胞外信号调节激(ERK),c-Jun氨基末端酶(JNK),核转录因子-
κ
B(NF-
κ
B)mRNA表达(
P
<
0.01)。
结论:
2
铁皮石斛不同道地种源的共性黄酮类成分新西兰牡荆苷Ⅱ在体外具有一定的抗氧化作用,能有效抑制HepG2 细胞增殖,并可能通过调控MAPK通路及Bax/Bcl-2途径诱导HepG2细胞凋亡。
Objective:
2
To study the antioxidation activities
in vitro
of a comment flavonoid component named vicenin Ⅱ(Apigenin 6
8-di-C-glucoside)in Dendrobii Officinalis Caulis from different origin places and investigate its effects on apoptosis of HepG2 cells.
Method:
2
The antioxidation activities
in vitro
of vicenin Ⅱ (0.005-1 g·L
-1
)were evaluated by 2
2-diphenyl-1-picrylhydrazyl (DPPH)
salicylic acid and 2-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid(ABTS)and copper ion reduction assays. Methye thiazolye telrazlium(MTT)assay was used to test the inhibitory effect of vicenin Ⅱ(12.5~100 μmol·L
-1
)on proliferation of 6 tumour cells
in vitro
. In subsequent apoptosis experiment
the concentration of vicenin Ⅱ was 75 μmol·L
-1
. The morphological changes of HepG2 cells were evaluated by Hoechst 33258 under fluorescence microscope; and the cell apoptosis rate was detected by flow cytometry with AnnexinV/PI apoptosis assay kit. The mRNA expressions of mitogen activated protein kinase (MAPK) pathway related apoptotic genes were detected by Real-time PCR assay.
Result:
2
The 1 g·L
-1
vicenin Ⅱ showed 48.82% and 22.01% for DPPH scavenging rate and Cu
2+
reduction rate respectively(
P
<
0.01). 0.5 g·L
-1
vicenin Ⅱ showed 86.88% for ABTS scavenging rate(
P
<
0.01). vicenin Ⅱ could significantly inhibit the proliferation and increase the apoptosis rate on HepG2 cells; after treatment for 48 h with 75 μmol·L
-1
Vicenin Ⅱ
the cells survival rate was 45.69%(
P
<
0.01)and apoptotic rate was 14.57%(
P
<
0.01). Meanwhile
the mRNA expression levels of B-cell lymphoma-2 (Bcl-2) related X protein (Bax)/Bcl-2
Caspase-8
p38
extracellular signal-regulated kinases (ERK)
c-Jun
N
-terminal kinase (JNK)
and nuclear transcription factor (NF)-
κ
B were increased(
P
<
0.01).
Conclusion:
2
The general flavone glycosides component vicenin Ⅱ of Dendrobii Officinalis Caulis from different origins has a certain antioxidation effect and significant inhibitory effect on proliferation
and could induce apoptosis on HepG2 cells probably by regulating the expression of related genes in MAPK pathway and Bax/Bcl-2.
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