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1.湖南中医药大学 第一附属医院,长沙 410007
2.湖南中医药大学,长沙 410208
李妲,博士,副主任医师,从事中医药防治呼吸系统疾病研究,E-mail:498472988@qq.com
范伏元,教授,主任医师,博士生导师,从事中医药防治呼吸系统疾病研究,E-mail:ffy023@163.com
收稿日期:2022-06-06,
网络出版日期:2022-12-02,
纸质出版日期:2023-06-05
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李妲,沈枭,吴趋荟等.柴胡含药血清通过Smad3/Rheb轴调节HFL1细胞凋亡和肌成纤维细胞转化[J].中国实验方剂学杂志,2023,29(11):89-96.
LI Da,SHEN Xiao,WU Quhui,et al.Medicated Serum of Bupleuri Radix Regulates HFL1 Apoptosis and Fibroblast-myofibroblast Transition via Smad3/Rheb Axis[J].Chinese Journal of Experimental Traditional Medical Formulae,2023,29(11):89-96.
李妲,沈枭,吴趋荟等.柴胡含药血清通过Smad3/Rheb轴调节HFL1细胞凋亡和肌成纤维细胞转化[J].中国实验方剂学杂志,2023,29(11):89-96. DOI: 10.13422/j.cnki.syfjx.20222438.
LI Da,SHEN Xiao,WU Quhui,et al.Medicated Serum of Bupleuri Radix Regulates HFL1 Apoptosis and Fibroblast-myofibroblast Transition via Smad3/Rheb Axis[J].Chinese Journal of Experimental Traditional Medical Formulae,2023,29(11):89-96. DOI: 10.13422/j.cnki.syfjx.20222438.
目的
2
利用转化生长因子-
β
1
(TGF-
β
1
)刺激人胚肺成纤维细胞(HFL1)模拟特发性肺纤维化(IPF)的病理过程,探讨柴胡含药血清对IPF的作用和机制。
方法
2
采用10 μg·L
-1
TGF-
β
1
刺激HFL1细胞,给予不同体积分数柴胡含药血清(5%、10%、15%、20%)干预24 h后,利用细胞增殖与活性检测试剂盒-8(CCK-8)检测细胞增殖率。随后细胞分为空白血清组(20%空白血清)、TGF-
β
1
组(20%空白血清和10 μg·L
-1
TGF-
β
1
)、TGF-
β
1
+柴胡含药血清组(5%空白血清、15%含药血清和10 μg·L
-1
TGF-
β
1
)、TGF-
β
1
+SIS3组(3 μmol·L
-1
SIS3、20%空白血清和10 μg·L
-1
TGF-
β
1
)。采用原位末端标记法(TUNEL)检测细胞凋亡率;通过实时荧光定量聚合酶链式反应(Real-time PCR)检测凋亡相关蛋白B细胞淋巴瘤-2(Bcl-2)、Bcl-2相关X蛋白(Bax)和肌成纤维细胞标志物
α
-平滑肌肌动蛋白(
α
-SMA)mRNA表达情况;通过免疫荧光法检测
α
-SMA、脑Ras同源蛋白(Rheb)、磷酸化(p)-Smad3蛋白表达;蛋白免疫印迹法(Western blot)检测Rheb、p-Smad3、Smad3蛋白表达。
结果
2
与空白血清组比较,TGF-
β
1
组细胞增殖率明显上升(
P
<
0.05)。与TGF-
β
1
组比较,TGF-
β
1
+15%柴胡含药血清组和TGF-
β
1
+20%柴胡含药血清组细胞增殖率显著降低(
P
<
0.01)。与空白血清组比较,TGF-
β
1
组细胞凋亡率显著下降,Bcl-2、
α
-SMA mRNA表达增加,Bax mRNA表达减少,
α
-SMA、Rheb蛋白表达增加,Smad3磷酸化水平明显上升(
P
<
0.05);与TGF-
β
1
组比较,TGF-
β
1
+柴胡含药血清组和TGF-
β
1
+SIS3组细胞凋亡率显著上升,Bcl-2、
α
-SMA mRNA表达减少,Bax mRNA表达增加,
α
-SMA、Rheb蛋白表达减少,Smad3磷酸化水平下降(
P
<
0.05)。
结论
2
柴胡能够抑制TGF-
β
1
诱导的HFL1细胞增殖和肌成纤维细胞转化,促进成纤维细胞凋亡,该作用可能与Smad3/Rheb轴有关。
Objective
2
Transforming growth factor-
β
1
(TGF-
β
1
) was used to stimulate human fetal lung fibroblast 1 (HFL1) for simulating the pathological process of idiopathic pulmonary fibrosis (IPF) and thereby the effects and mechanism of medicated serum of Bupleuri Radix against IPF were investigated.
Method
2
TGF-
β
1
(10 μg·L
-1
) was employed to stimulate HFL1, and cells were treated with medicated serum of Bupleuri Radix (5%, 10%, 15%, 20%) for 24 h. Then cell proliferation rate was determined with cell counting kit-8 (CCK-8). Subsequently, cells were classified into the control group (20% blank serum), TGF-
β
1
group (20% blank serum and 10 μg·L
-1
TGF-
β
1
), TGF-
β
1
+ medicated serum of Bupleuri Radix group (5% blank serum, 15% medicated serum, and 10 μg·L
-1
TGF-
β
1
), and TGF-
β
1
+ SIS3 group (3 μmol·L
-1
SIS3, 20% blank serum, 10 μg·L
-1
TGF-
β
1
). Based on in situ end labeling (TUNEL) staining, the apoptosis rate was examined, and mRNA expression of apoptosis-related proteins B-cell lymphoma 2 (Bcl-2), Bcl-2 associated X protein (Bax) and myofibroblast marker
α
-smooth muscle actin (
α
-SMA) was detected by Real-time fluorescence quantitative polymerase chain reaction (Real-time PCR). The protein expression of
α
-SMA, Ras homolog enriched in brain (Rheb), and phosphorylated (p)-Smad3 was determined by immunofluorescence. Expression of Rheb, p-Smad3, and Smad3 was examined by Western blot.
Result
2
The cell proliferation rate of TGF-
β
1
group increased compared with that of the control group (
P
<
0.05). The cell proliferation rate of TGF+15% medicated serum of Bupleuri Radix group and TGF+20% medicated serum of Bupleuri Radix group decreased compared with that of the TGF-
β
1
group (
P
<
0.01). Compared with the control group, TGF-
β
1
group showed decrease in apoptosis rate, increase in mRNA expression of Bcl-2 and
α
-SMA, reduction in Bax mRNA expression, and rise of
α
-SMA and Rheb protein expression and p-Smad3 level (
P
<
0.05). Compared with TGF-
β
1
group, TGF-
β
1
+ medicated serum of Bupleuri Radix group and TGF-
β
1
+ SIS3 group demonstrated high apoptosis rate, low Bcl-2 and
α
-SMA mRNA expression, high Bax mRNA expression, and low
α
-SMA and Rheb protein expression and p-Smad3 level (
P
<
0.05).
Conclusion
2
Medicated serum of Bupleuri Radix can inhibit TGF-
β
1
-induced HFL1 proliferation and fibroblast-myofibroblast transition and promote fibroblast apoptosis by regulating the Smad3/Rheb axis.
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