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1.浙江中医药大学 基础医学院,杭州 310053
2.浙江中医药大学 生命科学学院,杭州 310053
毛稳,在读硕士,从事肿瘤病理学研究,E-mail:maowen1231@126.com
杜月光,博士,教授,硕士生导师,从事中医药防治糖尿病并发症的实验研究,E-mail:duyueguang@163.com
收稿日期:2022-03-15,
网络出版日期:2022-06-16,
纸质出版日期:2022-10-20
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毛稳,夏琳颖,刘贤莉等.三七皂苷通过抑制自噬减轻TGF-β1诱导的肾小管上皮细胞损伤[J].中国实验方剂学杂志,2022,28(20):86-91.
MAO Wen,XIA Linying,LIU Xianli,et al.Panax notoginseng Saponins Alleviate TGF-β1-induced Renal Tubular Epithelial Cell Injury by Inhibiting Autophagy[J].Chinese Journal of Experimental Traditional Medical Formulae,2022,28(20):86-91.
毛稳,夏琳颖,刘贤莉等.三七皂苷通过抑制自噬减轻TGF-β1诱导的肾小管上皮细胞损伤[J].中国实验方剂学杂志,2022,28(20):86-91. DOI: 10.13422/j.cnki.syfjx.20221304.
MAO Wen,XIA Linying,LIU Xianli,et al.Panax notoginseng Saponins Alleviate TGF-β1-induced Renal Tubular Epithelial Cell Injury by Inhibiting Autophagy[J].Chinese Journal of Experimental Traditional Medical Formulae,2022,28(20):86-91. DOI: 10.13422/j.cnki.syfjx.20221304.
目的
2
探讨三七皂苷(
Panax notoginseng
saponins,PNS)抗转化生长因子-
β
1
(TGF-
β
1
)诱导的肾小管上皮细胞损伤的作用及机制。
方法
2
培养NRK-52E肾小管上皮细胞,分为空白组、TGF-
β
1
组、TGF-
β
1
+12.5 mg·L
-1
PNS组、TGF-
β
1
+25 mg·L
-1
PNS组、TGF-
β
1
+50 mg·L
-1
PNS组,PNS干预48 h,收集细胞及上清,采用倒置显微镜观察细胞形态;蛋白免疫印迹法(Western blot)检测上皮间质转化(EMT)相关蛋白、自噬相关蛋白表达;流式液相多重蛋白定量技术检测炎症因子含量;流式细胞术检测细胞凋亡率。
结果
2
与空白组比较,TGF-
β
1
诱导后细胞呈梭形改变且呈明显的EMT表现,即E-钙黏蛋白(E-cadherin)表达明显下调(
P
<
0.05),
α
-平滑肌肌动蛋白(
α
-SMA)表达明显上调(
P
<
0.05),PNS处理后,大部分细胞形态趋向正常并逆转EMT的发生。同时,与空白组比较,TGF-
β
1
组肿瘤坏死因子-
α
(TNF-
α
)水平明显升高,IL-10水平下降,凋亡率增加(
P
<
0.05),PNS作用后,TNF-
α
水平下降,IL-10水平升高,细胞凋亡率明显下降(
P
<
0.05)。并且TGF-
β
1
能明显上调肾小管上皮细胞自噬相关蛋白Beclin1和自噬相关蛋白微管相关蛋白轻链3Ⅱ/Ⅰ(LC3Ⅱ/Ⅰ)的表达(
P
<
0.05,
P
<
0.01),而PNS抑制其表达。
结论
2
PNS对TGF-
β
1
诱导的肾小管上皮细胞具有保护作用,其机制可能是通过抑制自噬来减轻炎症和凋亡,进而抵抗TGF-
β
1
诱导的损伤。
Objective
2
To investigate the role and mechanism of
Panax notoginseng
saponins (PNS) in inhibiting transforming growth factor-
β
1
(TGF-
β
1
)-induced renal tubular epithelial cell injury.
Method
2
NRK-52E renal tubular epithelial cells were cultured and divided into control group, TGF-
β
1
group,TGF-
β
1
+12.5 mg·L
-1
PNS group,TGF-
β
1
+25 mg·L
-1
PNS group and TGF-
β
1
+50 mg·L
-1
PNS group. After 48 hours of PNS intervention, the cells and the supernatant were collected, and cell morphology was observed by inverted microscope. Western blot was used to detect the expression of epithelial-mesenchymal transition (EMT)-related proteins and autophagy-related proteins. Flow liquid chromatography for multiple protein quantification and flow cytometry were employed to determine the content of inflammatory factors and apoptosis rate, respectively.
Result
2
Compared with the conditions in the control group, after TGF-
β
1
induction, the cells showed a spindle-shaped change and the expression of E-cadherin was down-regulated (
P
<
0.05), while the expression of
α
-smooth muscle actin (
α
-SMA) was up-regulated (
P
<
0.05). After PNS treatment, most of the cells tended to be normal and reversed the occurrence of EMT. In addition, compared with the conditions in the control group, the level of TNF-
α
was increased while that of IL-10 was decreased, with elevated apoptosis rate (
P
<
0.05) in the TGF-
β
1
group. After PNS treatment, the level of TNF-
α
was lowered while that of IL-10 was boosted with the increase of the dose, with reduced apoptosis rate (
P
<
0.05). Moreover, after TGF-
β
1
induction, the expression of autophagy-related proteins Beclin 1 and LC3Ⅱ/Ⅰ in renal tubular epithelial cells were up-regulated, while PNS inhibited their expression(
P
<
0.05,
P
<
0.01).
Conclusion
2
PNS had a protective effect on TGF-
β
1
-induced renal tubular epithelial cells, and the mechanism might be that it reduced inflammation and apoptosis by inhibiting autophagy, thus alleviating TGF-
β
1
-induced injury.
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