ZONG Shao-bo, SUN Lan, LYU Yao-zhong, et al. Effect of Jinzhen Oral Liquid on NF-B, MAPK Signaling Pathway in Mice with LPS-induced Acute Lung Injury[J]. Chinese journal of experimental traditional medical formulae, 2018, 24(9): 155-159.
ZONG Shao-bo, SUN Lan, LYU Yao-zhong, et al. Effect of Jinzhen Oral Liquid on NF-B, MAPK Signaling Pathway in Mice with LPS-induced Acute Lung Injury[J]. Chinese journal of experimental traditional medical formulae, 2018, 24(9): 155-159. DOI: 10.13422/j.cnki.syfjx.20180733.
目的:探讨金振口服液(JZKFY)对脂多糖(LPS)致急性肺损伤(ALI)模型小鼠的影响及其分子水平作用机制。方法:小鼠随机分为正常组、模型组、醋酸地塞米松组、金振口服液高、中、低(4.4,2.2,1.1 g · kg-1)剂量组,各给药组给予相应剂量药物,正常组和模型组灌胃同等剂量的生理盐水,1次/d,连续7 d后,模型组及药物组小鼠腹腔注射LPS(10 mg · kg-1)复制急性肺损伤小鼠模型,正常组腹腔注射同等剂量的生理盐水。6 h后采集小鼠肺组织,测定左肺湿/干质量比(W/D);酶联免疫吸附法(ELISA)检测肺组织中肿瘤坏死因子-α(TNF-α),白细胞介素(IL)-1β;蛋白免疫印迹法(Western blot)测定肺组织中p65,IκBα,ERK1/2,p38蛋白及其磷酸化蛋白表达水平。结果:与正常组比较,模型组小鼠W/D显著升高(P<0.01),肺组织中TNF-α,IL-1β水平显著升高(P<0.01),p65,IκBα,ERK1/2,p38蛋白磷酸化水平显著上调(P<0.01)。与模型组比较,金振口服液低、高剂量及地塞米松组W/D显著降低(P<0.05,P<0.01);金振口服液各剂量组及地塞米松组肺组织中TNF-α,IL-1β水平显著降低;金振口服液各剂量组及地塞米松组p65,IκBα,p38蛋白磷酸化水平显著下调(P<0.05,P<0.01),金振口服液高剂量、地塞米松组ERK1/2蛋白磷酸化水平显著下调(P<0.05,P<0.01)。结论:金振口服液能够有效改善LPS诱导的ALI肺组织间质性水肿及降低致炎细胞因子的含量,其作用机制与抑制p65,IκBα,ERK1/2,p38多个靶蛋白磷酸化,从而阻断核转录因子-κB(NF-κB),丝裂原活化蛋白激酶(MAPK)炎症通路的信号传导密切相关。
Abstract
Objective: To explore the effect and mechanism of Jinzhen oral liquid (JZOL) on lipopolysaccharide (LPS)-induced acute lung injury (ALI) model in mice. Method: Mice were randomly divided into normal control group
model group
dexamethasone group (DEX)
JZOL high (JZOLG)
medium (JZOLZ) and low (JZOLD) dose (4.4
2.2
1.1 g · kg-1) groups. Corresponding dose of medicine was given in the treatment groups
and the mice in normal group and model group received the same dose of normal saline
once a day for 7 days. Then the ALI models were induced by intraperitoneal injection of LPS (10 mg · kg-1)
while the mice in normal group received intraperitoneal injection of the same dose of normal saline. Six hour later
the lung tissues were taken; left lung wet-to-dry ratio (W/D) was measured; tumor necrosis factor (TNF)-α
and interleukin(IL)-1β in lung tissues were detected by enzyme-linked immunosorbent assay (ELISA); the protein expression levels of p65
IκBα
ERK1/2
p38 protein and their phosphorylation levels in lung tissues were detected by Western blot. Result: As compared with the normal group
the W/D
levels of TNF-α
IL-1β and the phosphorylation expression levels of p65
IκB
p38 protein were increased in the model group(P<0.01). As compared with the model group
the W/D was significantly decreased in JZOLD
JZOLG and DEX groups; the levels of TNF-α and IL-1β were decreased significantly
and the phosphorylation expression levels of p65
IκB
p38 protein were significantly down-regulated in JZOLG
JZOLZ
JZOLD
and DEX groups(P<0.05
P<0.01); and the phosphorylation expression level of ERK1/2 was significantly down-regulated in JZOLG and DEX groups(P<0.05
P<0.01). Conclusion: JZOLY can effectively improve the interstitial edema of the lung tissues and reduce inflammatory cytokines in mice with LPS-induced ALI. The mechanism is closely associated with inhibiting the phosphorylation levels of p65
IκBα
ERK1/2 and p38
blocking nuclear transcription factor-kappa B (NF-κB) and mitogen activated protein kinase (MAPK) inflammatory pathway.