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穿心莲内酯调节Nrg-1/ErbB4信号通路对缺血性脑卒中大鼠神经
元凋亡的影响
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邓 敏 ,禹 红 ,周 祥 ,孙海东 (1.武汉市中医医院检验科,武汉 430000;2.武汉市中医医院脑病科,
1*
1
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武汉 430000)
中图分类号 R965 文献标志码 A 文章编号 1001-0408(2024)21-2634-06
DOI 10.6039/j.issn.1001-0408.2024.21.10
摘 要 目的 探讨穿心莲内酯(Andro)调节神经调节蛋白1(Nrg-1)/表皮生长因子受体4(ErbB4)信号通路对缺血性脑卒中(IS)
大鼠神经元凋亡的影响。方法 采用线栓法建立 IS 大鼠模型。将 60 只造模成功的大鼠随机分为模型组(Model 组,生理盐水)、
Andro 低剂量组(Andro-L 组,50 mg/kg)、Andro 高剂量组(Andro-H 组,100 mg/kg)和 Andro-H+Dacomitinib 组(100 mg/kg Andro+
7.5 mg/kg Nrg-1/ErbB4信号通路抑制剂Dacomitinib),每组15只;另取15只大鼠为Sham组(生理盐水)。灌胃给药/生理盐水,每
天1次,连续7 d。给药结束后,评估大鼠神经功能;检测大鼠血清中乳酸脱氢酶(LDH)、肿瘤坏死因子α(TNF-α)、白细胞介素1β
(IL-1β)、IL-10、神经生长因子(NGF)水平;测定大鼠脑梗死面积;观察大鼠海马组织病理变化;检测大鼠海马神经元凋亡率和海
马组织中丙二醛(MDA)、超氧化物歧化酶(SOD)、过氧化氢酶(CAT)水平及基质金属蛋白酶 9(MMP-9)、剪切型胱天蛋白酶 3
(cleaved-caspase-3)、Nrg-1 蛋白表达水平和磷酸化 ErbB4(p-ErbB4)/ErbB4 比值。结果 与 Model 组比较,Andro-L 组、Andro-H 组
大鼠Zea-Longa评分,逃避潜伏期,血清中LDH、TNF-α、IL-1β水平,脑梗死面积百分比,海马神经元凋亡率,海马组织中MDA水
平和MMP-9、cleaved-caspase-3蛋白表达水平均显著降低/缩短(P<0.05);滞留时间、穿越平台次数,血清中IL-10、NGF水平,海马
组织中CAT、SOD水平和Nrg-1蛋白表达水平、p-ErbB4/ErbB4比值均显著延长/增加/升高(P<0.05);海马神经组织结构损伤程度
明显降低。Dacomitinib可减弱高剂量Andro对IS大鼠神经元损伤的改善作用(P<0.05)。结论 Andro可减轻IS大鼠炎症反应、
氧化应激和海马组织损伤,改善神经功能;其作用机制可能与激活Nrg-1/ErbB4信号通路有关。
关键词 穿心莲内酯;缺血性脑卒中;Nrg-1/ErbB4信号通路;神经元凋亡;神经功能
Effect of andrographolide on neuronal apoptosis in ischemic stroke rats by regulating Nrg-1/ErbB4
signaling pathway
DENG Min ,YU Hong ,ZHOU Xiang ,SUN Haidong(1. Dept. of Clinical Laboratory, Wuhan Hospital of
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Traditional Chinese Medicine, Wuhan 430000, China;2. Dept. of Encephalopathy, Wuhan Hospital of
Traditional Chinese Medicine, Wuhan 430000, China)
ABSTRACT OBJECTIVE To investigate the effect of andrographolide (Andro) on the neuronal apoptosis in ischemic stroke
(IS) rats by regulating the neuregulin-1 (Nrg-1)/epithelial growth factor receptor 4 (ErbB4) signaling pathway. METHODS The IS
rat model was established using the suture method. Sixty successfully modeled rats were randomly divided into model group
(physiological saline), Andro low-dose group (Andro-L group, 50 mg/kg), Andro high-dose group (Andro-H group, 100 mg/kg),
and Andro-H+Dacomitinib group (100 mg/kg of Andro+7.5 mg/kg of Nrg-1/ErbB4 signaling pathway inhibitor Dacomitinib), with
15 rats in each group. Another 15 rats were chosen as the sham group (physiological saline). The rats were intragastrically
administered medication/physiological saline once a day for 7 consecutive days. After medication, the neurological function of the
rats was assessed; the levels of lactate dehydrogenase (LDH), tumor necrosis factor-α (TNF-α), interleukin-1β (IL-1β), IL-10,
and nerve growth factor (NGF) in the rat serum were detected; the infarct area of the rat brain was measured, and the pathological
changes in the hippocampal tissue of the rats were observed. Moreover, the apoptosis rate of hippocampal neurons and the levels of
malondialdehyde (MDA), superoxide dismutase (SOD), catalase (CAT), matrix metalloproteinase-9 (MMP-9), cleaved-caspase-
3, Nrg-1 protein expressions and phosphorylated ErbB4 (p-ErbB4)/ErbB4 ratio in the hippocampal tissue were detected. RESULTS
Compared with the model group, the Zea-Longa score, the escape latency, the serum LDH, TNF-α, IL-1β levels, the percentage
of cerebral infarction area, the hippocampal neuron apoptosis rate, the MDA level and MMP-9, cleaved-caspase-3 protein
expression levels in the hippocampal tissue in the Andro-L and Andro-H groups were significantly reduced/shortened (P<0.05).
The dwelling time, the number of platform crossings, the serum IL-10, NGF levels, the CAT, SOD levels, the Nrg-1 protein
expression level and p-ErbB4/ErbB4 ratio in the hippocampal
Δ 基金项目 武汉市中医药科研项目(No.WZ22C67) tissue were significantly extended/increased (P<0.05); the
*第一作者 主管技师。研究方向:免疫学检验的临床应用。 degree of hippocampal neural tissue damage was significantly
E-mail:lrxxl3@163.com reduced. Dacomitinib could significantly weaken the
# 通信作者 主治医师。研究方向:针灸及中药治疗脑血管疾病及 improvement effect of high-dose Andro on neuronal injury in
神经系统疾病。E-mail:dl5vi6b@163.com IS rats (P<0.05). CONCLUSIONS Andro can reduce the
· 2634 · China Pharmacy 2024 Vol. 35 No. 21 中国药房 2024年第35卷第21期