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1.成都中医药大学,成都 611137
2.凉山州晟森生物科技有限公司,四川 西昌 615000
Received:25 October 2021,
Published Online:22 March 2022,
Published:05 May 2023
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张玉蝶,李欣,何晓艳等.余甘子醇提物对硅肺小鼠的保护作用及与Nrf2/ARE信号通路的相关性[J].中国实验方剂学杂志,2023,29(09):129-136.
ZHANG Yudie,LI Xin,HE Xiaoyan,et al.Protective Effect of Alcohol Extract of Phyllanthi Fructus on Silicosis Mice and Its Correlation with Nrf2/ARE Signaling Pathway[J].Chinese Journal of Experimental Traditional Medical Formulae,2023,29(09):129-136.
张玉蝶,李欣,何晓艳等.余甘子醇提物对硅肺小鼠的保护作用及与Nrf2/ARE信号通路的相关性[J].中国实验方剂学杂志,2023,29(09):129-136. DOI: 10.13422/j.cnki.syfjx.20230991.
ZHANG Yudie,LI Xin,HE Xiaoyan,et al.Protective Effect of Alcohol Extract of Phyllanthi Fructus on Silicosis Mice and Its Correlation with Nrf2/ARE Signaling Pathway[J].Chinese Journal of Experimental Traditional Medical Formulae,2023,29(09):129-136. DOI: 10.13422/j.cnki.syfjx.20230991.
目的
2
探讨余甘子醇提物对二氧化硅(SiO
2
)诱导的硅肺小鼠的影响及可能的作用机制。
方法
2
将SPF级雄性昆明小鼠36只随机分为空白组、模型组、余甘子高剂量组(800 mg·kg
-1
)、余甘子中剂量组(400 mg·kg
-1
)、余甘子低剂量组(200 mg·kg
-1
)、汉防己甲素组(0.039 mg·kg
-1
),每组6只。除空白组以外,其余组均采用静式染毒法复制硅肺模型。灌胃28 d后取出肺组织计算脏器系数;采用苏木素-伊红(HE)染色和Masson染色检测小鼠肺组织的组织形态;采用酶联免疫吸附测定法(ELISA)检测血清中的羟脯氨酸(HYP)、超氧化物歧化酶(SOD)、丙二醛(MDA)、过氧化氢酶(CAT)的含量;应用蛋白免疫印迹法(Western blot)和实时荧光定量聚合酶链式反应(Real-time PCR)技术检测核因子E
2
相关因子2(Nrf2)、血红素氧合酶-1(HO-1)、依赖型辅酶还原酶/醌氧化还原酶1(NQO1)、Kelch样环氧氯丙烷相关蛋白1(Keap1)蛋白和mRNA的表达。
结果
2
与空白组比较,模型组小鼠肺组织形态结构严重损伤,炎性细胞浸润,纤维组织增生;血清中SOD和CAT的含量均显著减少(
P
<
0.01),HYP和MDA的含量均显著增加(
P
<
0.01);肺组织中Nrf2、HO-1、NQO1蛋白与mRNA的表达均显著减少(
P
<
0.01),Keap1蛋白与mRNA的表达均明显增加(
P
<
0.05,
P
<
0.01)。与模型组比较,余甘子高、中剂量组小鼠的肺组织形态结构得到明显恢复,胶原沉积减少;余甘子高、中剂量组血清的SOD和CAT含量均明显增加(
P
<
0.05,
P
<
0.01),HYP和MDA含量均显著减少(
P
<
0.01);余甘子高、中剂量组肺组织的Nrf2、HO-1、NQO1蛋白与mRNA的表达均明显增加(
P
<
0.05,
P
<
0.01),Keap1蛋白与mRNA的表达均明显减少(
P
<
0.05,
P
<
0.01)。
结论
2
余甘子醇提物可以抑制硅肺小鼠肺纤维化,其机制可能与Nrf2/抗氧化反应元件(ARE)信号通路的调控有关。
Objective
2
To explore the effect and underlying mechanism of alcohol extract of Phyllanthi Fructus on silicosis mice induced by silicon dioxide (SiO
2
).
Method
2
Thirty-six male Kunming mice of SPF grade were randomly divided into a blank group,a model group,high-, medium, and low-dose Phyllanthi Fructus
groups (800, 400, 200 mg·kg
-1
),and a tetrandrine group (0.039 mg·kg
-1
),with six mice in each group. The silicosis model was induced by static SiO
2
exposure in mice except for those in the blank group. After 28 days of administration by gavage,the lung tissues were collected and the organ coefficient was calculated. Hematoxylin-eosin(HE)staining and Masson staining were used to detect the morphology of lung tissues. The content of hydroxyproline (HYP),superoxide dismutase (SOD),malondialdehyde (MDA), and catalase (CAT) in serum was detected by enzyme-linked immunosorbent assay (ELISA). Western blot and Real-time polymerase chain reaction(Real-time PCR) were used to detect the protein and mRNA expression of nuclear factor E
2
-related factor 2 (Nrf2),heme oxygenase-1 (HO-1),NAD(P)H:quinone oxidoreductase 1 (NQO1),and Kelch-like ECH-associated protein 1 (Keap1), respectively.
Result
2
Compared with the blank group,the model group showed seriously damaged morphological structure of lung tissues with inflammatory cell infiltration and fibrous tissue proliferation, reduced serum content of SOD and CAT(
P
<
0.01),increased content of HYP and MDA(
P
<
0.01), down-regulated protein and mRNA expression of Nrf2,HO-1, and NQO1(
P
<
0.01),and up-regulated protein and mRNA expression of Keap1 (
P
<
0.05,
P
<
0.01). Compared with the model group,the high- and medium-dose Phyllanthi Fructus
groups showed significantly restored morphological structure of lung tissues with reduced collagen deposition, increased serum content of SOD and CAT(
P
<
0.05,
P
<
0.01),decreased content of HYP and MDA(
P
<
0.01), up-regulated protein and mRNA expression of Nrf2,HO-1, and NQO1 (
P
<
0.05,
P
<
0.01),and down-regulated protein and mRNA expression of Keap1(
P
<
0.05,
P
<
0.01).
Conclusion
2
The alcohol extract of
Phyllanthi Fructus can inhibit pulmonary fibrosis in silicosis mice,and the underlying mechanism may be related to the regulation of the Nrf2/antioxidant response element (ARE) signaling pathway.
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