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河南中医药大学,郑州 450046
尚立芝,硕士,教授,从事中医药作用机制研究,Tel:0371-86253082,E-mail:lzshang2014@163.com
王国强,博士,助理研究员,从事中医药对免疫性疾病作用机制研究,Tel:0371-86253082,E-mail:biowgq@126.com;
王红伟,副教授,从事中医药治疗肺系疾病临床研究,E-mail: 156119506@qq.com
收稿日期:2019-05-31,
网络出版日期:2019-08-02,
纸质出版日期:2019-12-05
移动端阅览
尚立芝, 季书, 王国强, 等. 二陈汤加味通过抑制NLRP3通路对慢性阻塞性肺疾病的防治作用[J]. 中国实验方剂学杂志, 2019,25(23):56-64.
Li-zhi SHANG, Shu JI, Guo-qiang WANG, et al. Effect of Modified Erchentang on NLRP3 Inflammasome Expression in Peripheral Blood Mononuclear Cells (PBMCs) of Rats with Chronic Obstructive Pulmonary Disease[J]. Chinese journal of experimental traditional medical formulae, 2019, 25(23): 56-64.
尚立芝, 季书, 王国强, 等. 二陈汤加味通过抑制NLRP3通路对慢性阻塞性肺疾病的防治作用[J]. 中国实验方剂学杂志, 2019,25(23):56-64. DOI: 10.13422/j.cnki.syfjx.20192204.
Li-zhi SHANG, Shu JI, Guo-qiang WANG, et al. Effect of Modified Erchentang on NLRP3 Inflammasome Expression in Peripheral Blood Mononuclear Cells (PBMCs) of Rats with Chronic Obstructive Pulmonary Disease[J]. Chinese journal of experimental traditional medical formulae, 2019, 25(23): 56-64. DOI: 10.13422/j.cnki.syfjx.20192204.
目的:
2
观测二陈汤加味对慢性阻塞性肺疾病(COPD)大鼠外周血单个核细胞(PBMCs)中Nod样受体热蛋白结构域相关蛋白3(NLRP3)炎症小体相关基因表达的影响,探讨二陈汤加味对COPD抗炎的分子机制。
方法:
2
采用脂多糖(LPS)联合香烟烟雾方法制备COPD大鼠模型。40只大鼠随机平均分为正常组,模型组,二陈汤加味组,MCC950(NLRP3抑制剂)组。造模期间(从实验第1~30天),MCC950组于实验第1天单次腹腔注射60 mg·kg
-1
;二陈汤加味组以10 g·kg
-1
剂量灌胃,1次/2 d。造模成功后,从实验第31~45天,MCC950组腹腔注射3 mg·kg
-1
,1次/2 d;二陈汤加味组以10 g·kg
-1
剂量灌胃,2次/d;正常组、模型组灌胃生理盐水10 g·kg
-1
。酶联免疫吸附测定法(ELISA)测定大鼠肺组织匀浆中白细胞介素-1
β
(IL-1
β
),白细胞介素-18(IL-18)和趋化因子8(CXCL8)含量;实时荧光定量聚合酶链式反应(Real-time PCR)检测大鼠外周血PBMCs中NLRP3,凋亡相关斑点样蛋白(ASC)和半胱氨酸天冬氨酸蛋白水解酶-1(Caspase-1)mRNA表达;蛋白免疫印迹法(Western blot)检测PBMCs中NLRP3,ASC,Caspase-1蛋白表达;光镜观察肺组织结构变化,免疫组化检测NLRP3,ASC和Caspase-1在肺组织中的定位表达。
结果:
2
与正常组比较,模型组大鼠肺组织匀浆中IL-1
β
,IL-18和CXCL8含量均明显升高(
P
<
0.05,
P
<
0.01);PBMCs中NLRP3,ASC,Caspase-1 mRNA及蛋白表达水平均明显增高(
P
<
0.01);与模型组比较,二陈汤加味组PBMCs中NLRP3,ASC,Caspase-1 mRNA和蛋白表达水平均明显降低(
P
<
0.05,
P
<
0.01),肺匀浆中IL-1
β
,IL-18和CXCL8含量均明显下降(
P
<
0.05,
P
<
0.01),肺组织结构明显改善。
结论:
2
二陈汤加味对COPD有抗炎作用。其机制可能与抑制PBMCs中NLRP3,ASC,Caspase-1 mRNA表达,减少IL-1
β
,IL-18和CXCL8的释放有关。
Objective:
2
To observe the effect of modified Erchentang on the expressions of NLRP3 inflammasome genes in peripheral blood mononuclear cells (PBMCs) and the levels of interleukin-1
β
(IL-1
β
)and interleukin-18(IL-18)and chemokine8 (CXCL8) in lung tissue of rats with chronic obstructive pulmonary disease (COPD)
in order to explore the molecular mechanism of modified Erchentang against inflammation of COPD.
Method:
2
Forty SD rats were randomly divided into normal control group
model group
MCC950 (NLRP3 inhibitor) group and modified Erchentang group. The COPD model of rats was prepared by using cigarette smoke and dripping with lipopolysaccharide (LPS). During the modeling period (from the 1
st
to the 30
th
day)
the MCC950 group received a single intraperitoneal injection with 60 mg·kg
-1
on the first day of the experiment
and the modified Erchentang group was given intragastric administration with 10 g·kg
-1
once every 2 days. From the 31
st
to the 45
th
day
the MCC950 group was intraperitoneally injected with 3 mg·kg
-1
once every 2 days
the modified Erchentang group was given intragastric administration with 10 g·kg
-1
twice a day
and the normal group and the model group received normal saline (NS) with 10 g·kg
-1
twice a day. The levels of interleukin-1
β
(IL-1
β
)
interleukin-18(IL-18) and chemokine8 (CXCL8) in rats lung tissue homogenate were detected by enzyme-linked immunosorbent assay (ELISA). The expressions of NLRP3
apoptosis-associated speck-like protein (ASC) and cysteinyl aspartate specific proteinase-1 (Caspase-1) mRNA in PBMCs were measured by Real-time fluorescence quantitative PCR (Real-time PCR). Western blot was used to detect the levels of NLRP3
ASC and Caspase-1 proteins in PBMCs. Immunohistochemical(IHC)method was used to detect the expressions of NLRP3
ASC and Caspase-1 proteins in lung tissues.
Result:
2
The expressions of NLRP3
ASC and Caspase-1 mRNA and protein were increased significantly (
P
<
0.01) in model group compared with normal group. Compared with model group
the expressions of NLRP3
ASC and Caspase-1 mRNA and protein were decreased significantly in PBMCs (
P
<
0.05
P
<
0.01) of modified Erchentang group. The levels of IL-18
IL-1
β
and CXCL8 in lung tissue homogenate in model group were significantly higher than those in the control group. However
compared with model group
the levels of IL-18
IL-1
β
and CXCL8 were decreased significantly (
P
<
0.05
P
<
0.01) in modified Erchentang group.
Conclusion:
2
NLRP3 inflammasome is involved in the inflammatory response in COPD rats. Modified Erchentang may inhibit the inflammatory response of COPD effectively. The mechanism may be correlated with the reduction of NLRP3
ASC and Caspase-1 gene expressions
and the inhibition of the release of IL-18
IL-1
β
and CXCL8.
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