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北京中医药大学 生命科学学院,北京 102488
Received:29 August 2022,
Published Online:29 November 2022,
Published:20 March 2023
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刘姣,杨阳,何悦双等.基于SIRT1/FoxO1通路探究小檗碱抑制卵巢颗粒细胞凋亡与自噬的调节机制[J].中国实验方剂学杂志,2023,29(06):79-87.
LIU Jiao,YANG Yang,HE Yueshuang,et al.Regulatory Mechanism of Berberine in Inhibiting Apoptosis and Autophagy in Ovarian Granulosa Cells Based on SIRT1/FoxO1 Pathway[J].Chinese Journal of Experimental Traditional Medical Formulae,2023,29(06):79-87.
刘姣,杨阳,何悦双等.基于SIRT1/FoxO1通路探究小檗碱抑制卵巢颗粒细胞凋亡与自噬的调节机制[J].中国实验方剂学杂志,2023,29(06):79-87. DOI: 10.13422/j.cnki.syfjx.20230104.
LIU Jiao,YANG Yang,HE Yueshuang,et al.Regulatory Mechanism of Berberine in Inhibiting Apoptosis and Autophagy in Ovarian Granulosa Cells Based on SIRT1/FoxO1 Pathway[J].Chinese Journal of Experimental Traditional Medical Formulae,2023,29(06):79-87. DOI: 10.13422/j.cnki.syfjx.20230104.
目的
2
通过观察小檗碱(BBR)对卵巢颗粒细胞衰老的影响,探究其保护作用及调节机制。
方法
2
应用H
2
O
2
诱导建立人卵巢颗粒样肿瘤(KGN)细胞衰老模型;设置空白组、模型组、BBR高剂量(1 μmol·L
-1
)组和BBR低剂量(0.5 μmol·L
-1
)组,模型组与BBR组加入浓度为10 μmol·L
-1
H
2
O
2
,孵育40 min。通过细胞增殖与活性检测(CCK-8)分析检测BBR对KGN细胞增殖的影响;通过
β
-半乳糖苷酶染色检测BBR对KGN细胞衰老状态的影响;应用流式细胞术检测BBR对KGN细胞凋亡和ROS含量的影响;实时荧光定量聚合酶链式反应(Real-time PCR)检测BBR对KGN细胞抗凋亡蛋白B细胞淋巴瘤-2(Bcl-2)/促凋亡蛋白Bcl-2相关X蛋白(Bax)比值、胱天蛋白酶-3(Caspase-3)、叉头框转录因子O1(FoxO1)及过氧化氢酶(CAT)mRNA表达的影响;蛋白免疫印迹法(Western blot)检测BBR对KGN细胞沉默信息调节因子1(SIRT1)、超氧化物歧化酶2(SOD2)、c-Jun氨基末端激酶(JNK)、FoxO1、自噬相关蛋白微管相关蛋白轻链3Ⅱ(LC3BⅡ)、自噬关键分子酵母Atg6(Beclin-1)及泛素结合蛋白p62蛋白表达的影响。
结果
2
H
2
O
2
诱导40 min后,与空白组比较,模型组细胞增殖率显著下降(
P
<
0.01);与模型组比较,BBR干预组细胞增殖率明显上升(
P
<
0.05);
β
-半乳糖苷酶染色结果显示,与空白组比较,模型组细胞呈现明显的衰老状态(
P
<
0.01),BBR干预组细胞衰老情况较模型组显著降低(
P
<
0.01);流式细胞术检测显示,与空白组比较,模型组细胞凋亡率显著上升(
P
<
0.01),BBR干预组细胞凋亡率较模型组明显降低(
P
<
0.05);同时,与空白组比较,模型组ROS含量显著增加(
P
<
0.01);与模型组比较,BBR干预组细胞ROS含量显著降低(
P
<
0.01);Real-time PCR结果显示,与空白组比较,模型组KGN细胞CAT、Bcl-2/Bax mRNA表达明显降低,Caspase-3与FoxO1 mRNA表达明显增加(
P
<
0.05);与模型组比较,BBR干预后KGN细胞CAT与Bcl-2/Bax mRNA表达明显增加(
P
<
0.05),Caspase-3与FoxO1 mRNA表达较模型组明显降低(
P
<
0.05)。Western blot结果显示,与空白组比较,模型组SIRT1、SOD2及p62蛋白水平显著降低(
P
<
0.01),JNK、FoxO1、LC3BⅡ与Beclin-1蛋白水平明显升高(
P
<
0.05);BBR干预后,SIRT1、SOD2及p62蛋白水平较模型组显著增加(
P
<
0.01),JNK、FoxO1、LC3BⅡ与Beclin-1蛋白水平较模型组明显降低(
P
<
0.05)。
结论
2
BBR具有抑制卵巢颗粒细胞衰老效应,其机制与通过SIRT1/FoxO1通路介导抑制细胞凋亡与自噬有关。
Objective
2
To investigate the protective effect and regulatory mechanism of berberine (BBR) against the senescence of ovarian granulosa cells.
Method
2
A cell senescence model in the human ovarian granulosa-like tumor (KGN) cell line was induced by H
2
O
2
. A control group, a model group, and high-dose (1 μmol·L
-1
) and low-dose (0.5 μmol·L
-1
) BBR groups were set up. The cells in the model group and the BBR groups were incubated with 10 μmol·L
-1
H
2
O
2
for 40 min. The effect of BBR on KGN cell proliferation was detected by cell counting kit-8 (CCK-8) assay. The effect of BBR on the senescence of KGN cells was detected by
β
-galactosidase staining. The effects of BBR on the apoptosis and ROS content of KGN cells were detected by flow cytometry. The effects of BBR on the mRNA expression of B-cell lymphoma-2 (Bcl-2)/Bcl-2-associated X protein (Bax), cysteinyl aspartate-specific protease-3 (Caspase-3), forkhead transcription factor O1 (FoxO1), and catalase (CAT) was detected by Real-time fluorescence quantitative polymerase chain reaction (Real-time PCR). Western blot was used to detect the effects of BBR on protein expression of silent information regulator1 (SIRT1), superoxide dismutase 2 (SOD2), c-Jun N-terminal kinase (JNK), FoxO1, autophagy-associated protein microtubule-associated protein light chain 3Ⅱ (LC3BⅡ), mammalian ortholog of yeast Atg6 (Beclin-1), and ubiquitin-binding protein p62.
Result
2
After H
2
O
2
induction for 40 min, the cell proliferation rate of the model group decreased compared with that of the control group (
P
<
0.01), and the cell proliferation rates of the BBR groups increased compared with that of the model group (
P
<
0.05). The results of
β
-galactosidase staining showed that the cells of the model group showed significant senescence compared with those of the control group (
P
<
0.01), and the cellular senescence in the BBR groups was reduced compared with that of the model group (
P
<
0.01). As revealed by flow cytometry, compared with the control group, the model group showed increased apoptosis rate (
P
<
0.01), and compared with the model group, BBR groups showed decreased apoptosis rates (
P
<
0.05). Meanwhile, the ROS content in the model group increased compared with that in the control group (
P
<
0.01), and compared with the model group, the BBR groups showed reduced cellular ROS content (
P
<
0.01). The Real-time PCR results showed that compared with the control group, the model group showed decreased mRNA expression of CAT and Bcl-2/Bax in KGN cells and increased mRNA expression of Caspase-3 and FoxO1 (
P
<
0.05), and compared with the model group, the BBR groups showed increased mRNA expression of CAT and Bcl-2/Bax (
P
<
0.05) and reduced mRNA expression of Caspase-3 and FoxO1 in KGN cells (
P
<
0.05). As revealed by Western blot results, SIRT1, SOD2, and p62 protein levels decreased in the model group compared with those in the control group (
P
<
0.01), and JNK FoxO1, LC3BⅡ, and Beclin-1 protein levels increased (
P
<
0.05). After BBR intervention, SIRT1, SOD2, and p62 protein levels increased (
P
<
0.01), and JNK, FoxO1, LC3BⅡ, and Beclin-1 protein levels decreased compared with those in the model group (
P
<
0.05).
Conclusion
2
BBR has an inhibitory effect on ovarian granulosa cell senescence, and the mechanism is related to the inhibition of apoptosis and autophagy mediated by the SIRT1/FoxO1 pathway.
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