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1.陕西中医药大学 附属医院,陕西 咸阳 712000
2.陕西中医药大学 基础医学院,陕西 咸阳 712046
王瑞哲,硕士,副主任医师,从事中医药治疗呼吸系统疾病的基础与临床研究,E-mail:wrz6599@163.com
史捷,硕士,主任医师,从事中医药治疗呼吸系统疾病的基础与临床研究,E-mail:2780067265@qq.com
收稿日期:2021-05-13,
网络出版日期:2021-08-03,
纸质出版日期:2022-04-20
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王瑞哲,寇育乐,贺宏伟等.肺肠合治法对LPS诱导急性肺损伤大鼠NF-κB炎症通路和巨噬细胞极化的影响[J].中国实验方剂学杂志,2022,28(08):93-100.
WANG Rui-zhe,KOU Yu-le,HE Hong-wei,et al.Effect of Combined Therapy of Lung and Intestine on NF-κB Inflammatory Pathway and Macrophage Polarization in LPS-induced Acute Lung Injury Rats[J].Chinese Journal of Experimental Traditional Medical Formulae,2022,28(08):93-100.
王瑞哲,寇育乐,贺宏伟等.肺肠合治法对LPS诱导急性肺损伤大鼠NF-κB炎症通路和巨噬细胞极化的影响[J].中国实验方剂学杂志,2022,28(08):93-100. DOI: 10.13422/j.cnki.syfjx.20211804.
WANG Rui-zhe,KOU Yu-le,HE Hong-wei,et al.Effect of Combined Therapy of Lung and Intestine on NF-κB Inflammatory Pathway and Macrophage Polarization in LPS-induced Acute Lung Injury Rats[J].Chinese Journal of Experimental Traditional Medical Formulae,2022,28(08):93-100. DOI: 10.13422/j.cnki.syfjx.20211804.
目的
2
探究肺肠合治法(麻黄汤+大承气汤)对脂多糖(LPS)诱导的急性肺损伤(ALI)大鼠的作用与保护机制。
方法
2
将Wistar大鼠随机分为正常组、模型组、肺肠合治低、中、高剂量组、地塞米松组。通过LPS(10 mg·kg
-1
)腹腔注射成功复制ALI大鼠模型。观察与记录各组大鼠一般状态;采用肛温测量法记录各组大鼠造模后0~8 h体温数值;造模后24 h取材,收集血清与肺组织。酶联免疫吸附测定法(ELISA)检测大鼠血清白细胞介素-1
β
(IL-1
β
)、肿瘤坏死因子-
α
(TNF-
α
)、白细胞介素-10(IL-10)、精氨酸酶-1(Arg-1)含量;蛋白免疫印迹法(Western blot)检测各组大鼠肺组织中核转录因子-
κ
B p65(NF-
κ
B p65)、磷酸化核转录因子-
κ
B p65(p-NF-
κ
B p65)、核转录因子抑制蛋白
α
(I
κ
B
α
)、磷酸化核转录因子抑制蛋白
α
(p-I
κ
B
α
)蛋白的表达量;免疫荧光双标检测大鼠肺组织经典激活型(M1)巨噬细胞标记物CD80、IL-1
β
、巨噬细胞标记物F4/80、IL-10表达。
结果
2
与正常组比较,模型组大鼠体温和热效应指数(TRI)显著升高,血清促炎因子TNF-
α、
IL-1
β
和抗炎因子IL-10水平显著升高(
P
<
0.01),肺组织p-NF-
κ
B p65、p-I
κ
B
α
蛋白表达显著升高(
P
<
0.01),肺组织巨噬细胞标志物F4/80、M1巨噬细胞标志物CD80和IL-1
β
的表达显著升高(
P
<
0.01);与模型组比较,肺肠合治各组和地塞米松组大鼠体温与TRI指数降低(
P
<
0.01),血清炎症因子TNF-
α
、IL-1
β
水平降低(
P
<
0.05,
P
<
0.01),血清抗炎因子IL-10、Arg-1水平升高(
P
<
0.05,
P
<
0.01),肺组织p-NF-
κ
B p65、p-I
κ
B
α
蛋白表达降低(
P
<
0.05,
P
<
0.01),肺组织M1巨噬细胞标志物CD80、IL-1
β
表达显著降低和IL-10表达显著升高(
P
<
0.01),巨噬细胞标志物F4/80表达无明显变化。
结论
2
肺肠合治方剂对ALI大鼠的发热与炎症状态有明显的改善,其机制可能与NF-
κ
B炎症通路被抑制,肺组织巨噬细胞向抗炎表型极化有关。
Objective
2
To investigate the effect of combined therapy of lung and intestine (Mahuangtang + Da Chengqitang) on lipopolysaccharide (LPS)-induced acute lung injury (ALI) in rats and its protective mechanism.
Method
2
Wistar rats were randomly divided into blank group, model group, low-, medium-, and high-dose groups with combined therapy of lung and intestine , and dexamethasone group. LPS (10 mg·kg
-1
) was given (
ip
) to induce ALI in rats. The general state of rats in each group was observed and recorded. The body temperature of rats in each group was recorded 0-8 h after modeling by means of anal temperature measurement. Serum and lung tissues were collected 24 h after modeling. Serum levels of interleukin-1
β
(IL-1
β
), tumor necrosis factor-
α
(TNF-
α
), interleukin-10 (IL-10), and arginase-1 (Arg-1) were determined by enzyme-linked immunosorbent assay (ELISA). Western blot was used to detect the protein levels of nuclear factor kappa B p65 (NF-
κ
B p65), phosphorylated NF-
κ
B p65 (p-NF-
κ
B p65), NF-
κ
B inhibitor
α
(I
κ
B
α
), and phosphorylated I
κ
B
α
(p-I
κ
B
α
) in lung tissues of rats. The levels of classically activated (M1) macrophage marker CD80 and IL-1
β
and macrophage markers F4/80 and IL-10 were detected by double immunofluorescence.
Result
2
Compared with the blank group, the model group showed increased body temperature and thermal response index (TRI), elevated serum levels of pro-inflammatory factor TNF-
α
and IL-1
β
and anti-inflammatory factor IL-10 (
P
<
0.01), up-regulated protein levels of p-NF-
κ
B p65 and p-I
κ
B
α
in lung tissues (
P
<
0.01), and increased levels of F4/80, CD80, and IL-1
β
in lung tissues (
P
<
0.01). Compared with the model group, the lung-intestine combined treatment groups and the dexamethasone group exhibited decreased body temperature and TRI in rats (
P
<
0.01), declined serum levels of inflammatory factor TNF-
α
and IL-1
β
(
P
<
0.05,
P
<
0.01), elevated serum levels of anti-inflammatory factor IL-10 and Arg-1 (
P
<
0.05,
P
<
0.01), down-regulated protein levels of p-NF-
κ
B p65 and p-I
κ
B
α
in lung tissues (
P
<
0.05,
P
<
0.01), decreased levels of CD80 and IL-1
β
, and increased levels of IL-10 in lung tissues (
P
<
0.01), while the level of F4/80 was not significantly changed.
Conclusion
2
The combined therapy of lung and intestine can obviously alleviate the fever and inflammatory state of ALI rats, and the mechanism may be related to the inhibition of NF-
κ
B inflammatory pathway and the polarization of lung tissue macrophages to anti-inflammatory phenotype.
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