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1.河北中医学院,石家庄 050200
2.河北省中西医结合肺病研究重点实验室,石家庄 050091
张喆,在读硕士,从事肺脏病证基础与临床研究,E-mail:2587373202@qq.com
方朝义,博士,教授,博士生导师,从事肺脏病证基础与临床研究,E-mail:hbfcy@163.com
收稿日期:2022-03-19,
网络出版日期:2022-06-29,
纸质出版日期:2022-09-05
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张喆,赵舒,韩云鹏等.补阳还五汤对特发性肺纤维化大鼠Keap1/Nrf2/HO-1抗氧化信号通路的影响[J].中国实验方剂学杂志,2022,28(17):9-16.
ZHANG Zhe,ZHAO Shu,HAN Yunpeng,et al.Effect of Buyang Huanwutang on Keap1/Nrf2/HO-1 Antioxidant Signaling Pathway in Rats with Idiopathic Pulmonary Fibrosis[J].Chinese Journal of Experimental Traditional Medical Formulae,2022,28(17):9-16.
张喆,赵舒,韩云鹏等.补阳还五汤对特发性肺纤维化大鼠Keap1/Nrf2/HO-1抗氧化信号通路的影响[J].中国实验方剂学杂志,2022,28(17):9-16. DOI: 10.13422/j.cnki.syfjx.20221639.
ZHANG Zhe,ZHAO Shu,HAN Yunpeng,et al.Effect of Buyang Huanwutang on Keap1/Nrf2/HO-1 Antioxidant Signaling Pathway in Rats with Idiopathic Pulmonary Fibrosis[J].Chinese Journal of Experimental Traditional Medical Formulae,2022,28(17):9-16. DOI: 10.13422/j.cnki.syfjx.20221639.
目的
2
观察补阳还五汤对特发性肺纤维化(IPF)大鼠Kelch样ECH相关蛋白1(Keap1)/核因子E
2
相关因子2(Nrf2)/血红素氧合酶-1(HO-1)抗氧化信号通路的影响,探讨该方干预IPF的作用机制。
方法
2
将40只SPF级雄性SD大鼠按照随机数字表法分为假手术组、模型组、补阳还五汤组、尼达尼布组,每组10只。除假手术组外,其余各组气管内滴注博来霉素(0.005 g·kg
-1
)制备IPF大鼠模型。补阳还五汤组灌服补阳还五汤煎液(14.84 g·kg
-1
),尼达尼布组灌服尼达尼布混悬液(0.1 g·kg
-1
),假手术组、模型组灌服等容积生理盐水,共28 d。肺功能检测后,取血清及肺组织。苏木素-伊红(HE)染色和马松(Masson)染色观察肺组织病理改变并行半定量分析;检测肺组织羟脯氨酸(HYP)含量;测定血清和肺组织丙二醛(MDA)含量及超氧化物歧化酶(SOD)、谷胱甘肽过氧化物酶(GSH-Px)、过氧化氢酶(CAT)活性;实时荧光定量聚合酶链式反应(Real-time PCR)、免疫组化和蛋白免疫印迹法(Western blot)分别检测Keap1、Nrf2、HO-1 mRNA与蛋白表达情况。
结果
2
与假手术组比较,模型组大鼠呼吸系统阻力和弹力增高,顺应性显著降低(
P
<
0.01);肺指数和病理评分、HYP含量显著升高(
P
<
0.01);血清和肺组织MDA含量增加,SOD、GSH-Px、CAT活性显著降低(
P
<
0.01);肺组织Keap1 mRNA与蛋白表达降低,Nrf2、HO-1 mRNA与蛋白表达显著升高(
P
<
0.01)。与模型组比较,补阳还五汤组大鼠呼吸系统阻力和弹力下降,顺应性显著升高(
P
<
0.01);肺指数、病理评分、肺组织HYP含量显著降低(
P
<
0.01);血清和肺组织MDA含量下降、SOD、GSH-Px、CAT活性显著升高(
P
<
0.01);肺组织Keap1表达降低,Nrf2、HO-1表达升高(
P
<
0.05,
P
<
0.01)。
结论
2
补阳还五汤可启动Keap1/Nrf2/HO-1介导的抗氧化效应,增强机体抗氧化能力,延缓IPF大鼠病理进程。
Objective
2
To study the effect of Buyang Huanwutang on Kelch-like Ech-related protein 1 (Keap1)/nuclear factor E
2
-related factor 2 (Nrf2)/heme oxygenase-1 (HO-1) antioxidant signaling pathway in rats with idiopathic pulmonary fibrosis (IPF) and explore the mechanism of this prescription in the treatment of IPF.
Method
2
Forty SPF-grade male SD rats were assigned into a sham operation group, a model group, a Buyang Huanwutang group, and a nintedanib group according to random number table method, with 10 rats in each group. IPF rat model was established by intratracheal infusion of bleomycin (0.005 g·kg
-1
) in other groups except the sham operation group. Buyang Huanwutang group was administrated with Buyang Huanwutang (14.84 g·kg
-1
),intragastric administration of nitedanib suspension (0.1 g·kg
-1
),sham operation group and model group were given equal volume of normal saline, for 28 days. After lung function test, serum and lung tissue samples were collected. Hematoxylin-eosin (HE) staining and Masson trichrome staining were employed to observe the pathological changes of the lung tissue. The content of hydroxyproline (HYP) in lung tissue was detected. The levels of malondialdehyde (MDA) in serum and lung tissue, and the activities of superoxide dismutase (SOD), glutathione peroxidase (GSH-Px) and catalase (CAT) were determined. The mRNA and protein levels of Keap1, Nrf2, and HO-1 was determined by Real-time fluorescent quantitative polymerase chain reaction, immunohistochemical staining, and Western blot.
Result
2
Compared with the sham operation group, the modeling increased the resistance and elasticity and decreased the compliance of respiratory system (
P
<
0.01), elevated the lung index, pathological score, and HYP content in lung tissue (
P
<
0.01), and enriched MDA in serum and lung tissue, while it decreased the activities of SOD, GSH-Px, and CAT (
P
<
0.01). Furthermore, the modeling down-regulated the mRNA and protein levels of Keap1 and up-regulated those of Nrf2 and HO-1 in lung tissue (
P
<
0.01). Compared with the model group, Buyang Huanwutang decreased the resistance and elasticity and increased the compliance of respiratory system (
P
<
0.01), lowered the lung index, pathological score, and HYP content in lung tissue (
P
<
0.01), and reduced MDA in serum and lung tissue, while it increased the activities of SOD, GSH-Px, and CAT (
P
<
0.01). Additionally, Buyang Huanwutang down-regulated the expression of Keap1 and up-regulated that of Nrf2 and HO-1 in lung tissue (
P
<
0.05,
P
<
0.01).
Conclusion
2
Buyang Huanwutang can activate Keap1/Nrf2/HO-1 signaling pathway to enhance the antioxidant capacity and slow down the pathological process of IPF in rats.
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