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大黄素对感染性早产大鼠的改善作用及机制
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曹定娅 1, 2* ,武晓娟 ,付婷婷 ,宋 兵 (1.广州医科大学附属第三医院产前诊断科,广州 510150;2.广东
1, 2
1, 2
省产科重大疾病重点实验室,广州 510150;3.广州医科大学附属第三医院妇产科,广州 510150)
中图分类号 R965 文献标志码 A 文章编号 1001-0408(2024)21-2629-05
DOI 10.6039/j.issn.1001-0408.2024.21.09
摘 要 目的 探究大黄素对感染性早产大鼠的改善作用及机制。方法 构建感染性早产大鼠模型,将其分成模型组、大黄素组
(60 mg/kg,灌胃)、核因子κB(NF-κB)抑制蛋白激酶(IKK)激活组(2 μg pcDNA3.1-IKK重组质粒,尾静脉注射)、大黄素+IKK激活
组(灌胃60 mg/kg大黄素+尾静脉注射2 μg pcDNA3.1-IKK重组质粒),每组14只。另取14只受孕雌鼠作为对照组。各组大鼠给
予相应药物干预7 d。检测大鼠子宫肌条肌张力和血清中炎症指标[白细胞介素1β(IL-1β)、IL-6、肿瘤坏死因子α(TNF-α)]和氧化
应激指标[超氧化物歧化酶(SOD)、丙二醛(MDA)、过氧化氢酶(CAT)]水平;观察大鼠子宫组织病理学形态变化;检测大鼠子宫组
织中NOD样受体蛋白3(NLRP3)、剪切型胱天蛋白酶1(cleaved-caspase-1)和IKK/NF-κB抑制蛋白(IκB)/NF-κB信号通路相关蛋
白表达水平。结果 与对照组相比,模型组大鼠子宫平滑肌出现了大量炎症细胞浸润,细胞分布不规则;子宫肌条肌张力和血清中
IL-1β、IL-6、TNF-α、MDA 水平以及子宫组织中 NLRP3、cleaved-caspase-1、IKK、IκB、NF-κB p65 蛋白表达水平均显著升高(P<
0.05),血清中SOD、CAT水平均显著降低(P<0.05)。与模型组相比,大黄素组大鼠子宫平滑肌层炎症细胞浸润现象减轻,各定量
指标均明显改善(P<0.05);IKK 激活组大鼠子宫平滑肌层炎症细胞浸润现象加重,各定量指标均进一步恶化(P<0.05)。激活
IKK可明显减弱大黄素对感染性早产大鼠上述指标的改善作用(P<0.05)。结论 大黄素可能通过抑制IKK/IκB/NF-κB信号通路
活性,减轻炎症反应和氧化应激,从而改善感染性早产大鼠子宫平滑肌收缩。
关键词 大黄素;感染性早产;IKK/IκB/NF-κB信号通路;子宫平滑肌;炎症;氧化应激
Ameliorative effect and mechanism of emodin on infectious preterm rats
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CAO Dingya ,WU Xiaojuan ,FU Tingting ,SONG Bing (1. Dept. of Prenatal Diagnosis, the Third
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Hospital Affiliated to Guangzhou Medical University, Guangzhou 510150, China;2. Guangdong Provincial Key
Laboratory of Obstetrics Major Diseases, Guangzhou 510150, China;3. Dept. of Obstetrics and Gynecology,
the Third Hospital Affiliated to Guangzhou Medical University, Guangzhou 510150, China)
ABSTRACT OBJECTIVE To explore the ameliorative effect and mechanism of emodin on infectious preterm rats. METHODS
The infectious preterm rat model was established and divided into model group, emodin group (60 mg/kg, i.g.), IKK activation
group (2 μg pcDNA3.1-IKK recombinant plasmid via tail vein), emodin+IKK activation group (i. g. 60 mg/kg emodin+2 μg
pcDNA3.1-IKK recombinant plasmid via tail vein), with 14 rats in each group. Another 14 pregnant female rats were set up as
control group. Each group received corresponding intervention for 7 days. The muscle tension of the uterine muscle strip, and the
indicator levels of serum inflammation [interleukin 1β (IL-1β), IL-6, tumor necrosis factor α(TNF- α)] and oxidative stress
[superoxide dismutase (SOD), malondialdehyde (MDA), catalase (CAT)] were detected; the pathological morphological changes
of uterine tissue in rats were observed; the protein expressions of NOD-like receptor protein 3 (NLRP3), cleaved-caspase-1 and
IKK/IκB/NF-κB signaling pathway were detected. RESULTS Compared with control group, a large number of inflammatory cells
infiltrated into the smooth muscle layer of uterus in model group with irregular cell distribution; the uterine muscle strip muscle
tone, serum levels of IL-1β, IL-6, TNF-α and MDA, protein expressions of NLRP3, cleaved-caspase-1, IKK, IκB and NF-κB
p65 in uterine tissue were significantly increased in model group, and the serum levels of SOD and CAT were significantly
decreased (P<0.05). Compared with the model group, the infiltration of inflammatory cells in the uterine smooth muscle layer was
reduced in the emodin group, and all quantitative indexes were significantly improved (P<0.05); the infiltration of inflammatory
cells in the uterine smooth muscle layer was increased in IKK activation group, and all quantitative indexes further deteriorated
(P<0.05). Activation of IKK could significantly reduce the improvement effect of emodin on the above indexes in infectious
preterm rats (P<0.05). CONCLUSIONS Emodin can relieve inflammation and oxidative stress in infectious preterm rats
by inhibiting the IKK/IκB/NF- κB signaling pathway, thus
Δ 基金项目 广州市卫生健康科技项目(No. 20221A011088) improving uterine smooth muscle contraction.
*第一作者 主治医师,硕士。研究方向:围产医学。E-mail:
caodingya596@163.com KEYWORDS emodin; infectious preterm; IKK/IκB/NF- κB
# 通信作者 助理研究员,博士。研究方向:妊娠期疾病诊治。 signaling pathway; uterine smooth muscle; inflammation;
E-mail:bingsong2012683034@gzhmu.edu.cn oxidative stress
中国药房 2024年第35卷第21期 China Pharmacy 2024 Vol. 35 No. 21 · 2629 ·