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龙生蛭胶囊保护脑缺血再灌注损伤大鼠的作用及机制研究
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          方欢乐 ,李晓明 ,周亚明 ,张 鑫 ,刘小溪 ,陈衍斌 (1.西安培华学院医学院,西安 710125;2.陕西步长
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          制药有限公司科研部,西安 710075;3.西安交通大学医学部,西安 710061)
          中图分类号  R965      文献标志码  A      文章编号  1001-0408(2024)07-0813-06
          DOI  10.6039/j.issn.1001-0408.2024.07.08
          摘  要  目的  探讨龙生蛭胶囊对脑缺血再灌注损伤大鼠的脑保护作用及机制。方法  通过改良线栓法建立大鼠大脑中动脉阻塞
         (MCAO)模型。实验分为假手术组(仅分离血管不插线栓,予同体积生理盐水)、模型组(造模,予同体积生理盐水)、尼莫地平组
         (阳性对照,造模,给药剂量为20 mg/kg)和龙生蛭胶囊低、中、高剂量组(造模,给药剂量依次为0.72、1.44、2.88 g/kg),每组10只。
          各组大鼠灌胃相应药液/生理盐水,每天1次,连续7 d。末次给药1 h后,采用Zea Longa评分法对各组大鼠的神经功能缺失情况进
          行评分;ABC-酶联免疫吸附试验法检测大鼠血清肿瘤坏死因子α(TNF-α)、白细胞介素6(IL-6)水平;TTC染色观察大鼠脑梗死体
          积并计算脑梗死体积比;苏木精-伊红染色观察大鼠脑组织病理形态的变化;免疫组化法检测大鼠脑组织NLRP3蛋白阳性表达情
          况;实时荧光定量 PCR 法检测大鼠脑组织 Toll 样受体 4(TLR4)、核因子 κB(NF-κB)mRNA 表达;Western blot 法检测大鼠脑组织
          TLR4、NLRP3、磷酸化NF-κB(p-NF-κB)及细胞核内NF-κB蛋白表达情况。结果  与假手术组比较,模型组大鼠神经功能缺失评
          分,血清TNF-α和IL-6水平,脑梗死体积比,脑组织NF-κB和TLR4 mRNA的相对表达水平,以及脑组织TLR4、NLRP3、 p-NF-κB
          蛋白的相对表达水平及其细胞核内NF-κB蛋白的相对表达水平均显著升高(P<0.01);大鼠脑组织皮层神经细胞间隙增大、水肿
          明显,可见大量炎性细胞浸润;大鼠脑组织中NLRP3蛋白阳性表达明显增多。与模型组比较,龙生蛭胶囊中、高剂量组及尼莫地
          平组大鼠以上指标水平均有不同程度逆转,大部分差异有统计学意义(P<0.05或P<0.01);病理形态观察结果明显好转,大鼠脑
          组织中NLRP3蛋白阳性表达均明显减少。结论  龙生蛭胶囊可能通过抑制TLR4/NF-κB/NLRP3信号通路,抑制神经炎症反应,从
          而达到对大鼠脑缺血再灌注损伤的保护作用。
          关键词  龙生蛭胶囊;脑缺血再灌注损伤;炎症因子;TLR4/NF-κB/NLRP3信号通路

          Protective effect and mechanism of Longshengzhi capsules on cerebral ischemia-reperfusion injury in rats
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          FANG Huanle ,LI Xiaoming ,ZHOU Yaming ,ZHANG Xin ,LIU Xiaoxi ,CHEN Yanbin (1. Medical College
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          of  Xi’an  Peihua  University,  Xi’an  710125,  China;2.  Scientific  Research  Department,  Buchang  Pharma  Co.,
          Ltd., Xi’an 710075, China;3. Xi’an Jiaotong University Health Science Center,Xi’an 710061, China)
          ABSTRACT   OBJECTIVE  To  explore  the  protective  effect  and  mechanism  of  Longshengzhi  capsules  on  cerebral  ischemia-
          reperfusion  injury  in  rats.  METHODS  The  model  of  middle  cerebral  artery  occlusion (MCAO)  was  established  by  using  the
          improved thread occlusion method. The experiment was divided into six groups: sham surgery group (only separating blood vessels
          without  inserting  thread  plugs,  given  the  same  volume  of  normal  saline),  model  group (modeling,  given  the  same  volume  of
          normal  saline),  nimodipine  group (positive  control,  modeling,  dose  of  20  mg/kg),  and  low-dose,  medium-dose,  and  high-dose
          groups of Longshengzhi capsules (modeling, doses of 0.72, 1.44 and 2.88 g/kg, respectively), with 10 mice in each group. Each
          group  was  given  corresponding  medication  solution/normal  saline  by  gavage,  once  a  day,  for  7  consecutive  days.  One  hour  after
          the last administration, the Zea Longa scoring method was used to score the neurological deficits in each group of rats, and the ABC
          enzyme-linked immunosorbent assay was used to detect the serum levels of tumor necrosis factor-α (TNF-α) and interleukin-6 (IL-6)
          in rats; TTC staining was used to observe the volume of cerebral infarction in rats and calculate the cerebral infarction volume ratio.
          Hematoxylin  eosin  staining  was  used  to  observe  the  pathological  changes  in  the  brain  tissue  of  rats.  Immunohistochemical  staining
          was used to detect the positive expression of NLRP3 protein in the brain tissue of rats. Real-time fluorescence quantitative PCR was
          used to detect mRNA relative expressions of Toll-like receptor 4 (TLR4) and nuclear factor-κB (NF-κB) in the brain tissue of rats.
          Western blot assay was adopted to detect the relative expressions of TLR4, NLRP3 and phosphorylated NF-κB (p-NF-κB) protein
          in  the  brain  tissue  of  rats  and  its  intracellular  NF- κB  protein.  RESULTS  Compared  with  the  sham  surgery  group,  the  neural
                                                             dysfunction  score,  serum  levels  of  TNF-α  and  IL-6,  cerebral
             Δ 基金项目 陕西省重点研发计划项目(No.2021SF-362);陕西省           infarction  volume  ratio,  relative  expression  levels  of  NF- κB
          教育厅重点科学研究计划协同创新项目(No.21JY001);西安培华学院
                                                             and  TLR4  mRNA,  as  well  as  protein  relative  expressions  of
          校级科研项目(No.PHKT2220)                                TLR4,  NLRP3  and  p-NF-κB  in  the  brain  tissue,  and  relative
             *第一作者 副教授,硕士。研究方向:心血管药理学。E-mail:
                                                             protein  expression  of  intracellular  NF-κB  were  increased
          43599079@qq.com
             # 通信作者 副主任药师,博士。研究方向:中药新药研究与开发。                 significantly  in  the  model  group (P<0.01);  the  enlarged  gap
          E-mail:50713751@qq.com                             and  significant  edema  were  observed  in  cortical  nerve  cells  of


          中国药房  2024年第35卷第7期                                                 China Pharmacy  2024 Vol. 35  No. 7    · 813 ·
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