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基于 Nrf2/HO-1 信号通路探讨虾青素对创伤性脑损伤模型大鼠

          氧化应激和炎症反应的影响
                                                     Δ


          易宇光 ,刘昌平,何佳佳(萍乡市第二人民医院神经外科,江西 萍乡 337000)
                *

          中图分类号  R965;R651.1+5      文献标志码  A      文章编号  1001-0408(2023)20-2490-07
          DOI  10.6039/j.issn.1001-0408.2023.20.08

          摘   要  目的  探讨虾青素对创伤性脑损伤(TBI)大鼠氧化应激和炎症反应的影响。方法  将雄性 SD 大鼠分为假手术组、模型
          组、虾青素低剂量组(20 mg/kg)、虾青素高剂量组(40 mg/kg)、虾青素+ML385组[虾青素40 mg/kg+核转录因子红系2相关因子2
         (Nrf2)抑制剂ML385 30 mg/kg],每组14只。除假手术组外,其余各组大鼠按改良的Feeney自由落体撞击法复制TBI大鼠模型。
          各药物组大鼠灌胃或腹腔注射相应药液,假手术组和模型组大鼠灌胃等体积生理盐水。分别于药物干预后第1、3、7天对各组大
          鼠的神经功能进行评分;于药物干预后第7天,观察各组大鼠脑组织形态学变化并进行炎症浸润评分,观察其脑组织神经细胞超
          微结构,检测脑组织中氧化应激指标[超氧化物歧化酶(SOD)、过氧化氢酶(CAT)、谷胱甘肽过氧化物酶(GSH-Px)、丙二醛
         (MDA)、一氧化氮(NO)]、炎症反应指标[肿瘤坏死因子α、白细胞介素1β(IL-1β)、IL-6、诱导型一氧化氮合酶]含量和Nrf2、血红素
          加氧酶1(HO-1)、NAD(P)H醌氧化还原酶1(NQO1)蛋白及mRNA的表达情况。结果  与假手术组比较,模型组大鼠脑组织水肿
          明显并伴有大量炎症细胞浸润,神经细胞的细胞器形态受损、数量减少且超微结构破损严重;其神经功能评分,脑组织中 SOD、
          CAT、GSH-Px、NO含量和Nrf2、HO-1、NQO1蛋白及mRNA的相对表达水平均显著降低,炎症浸润评分、MDA含量和炎症反应指
          标含量均显著升高(P<0.05)。与模型组比较,低、高剂量虾青素可显著改善脑组织及神经细胞的病理状态和神经功能评分(虾青
          素低剂量组药物干预第 1 天除外),可剂量依赖性地升高脑组织中 SOD、CAT、GSH-Px、NO 含量和 Nrf2、HO-1、NQO1 蛋白及
          mRNA的相对表达水平,降低炎症浸润评分、MDA含量和炎症反应指标含量(P<0.05);而ML385可显著抑制虾青素的上述作用
         (P<0.05)。结论  虾青素可能通过激活 Nrf2/HO-1 信号通路而减轻 TBI 大鼠的氧化应激,缓解其神经功能损伤,降低炎症反应
          水平。
          关键词  虾青素;创伤性脑损伤;氧化应激;炎症反应;核转录因子红系2相关因子2/血红素加氧酶1信号通路


          Effects  of  astaxanthin  on  oxidative  stress  and  inflammatory  reaction  in  rats  with  traumatic  brain  injury
          based on Nrf2/HO-1 signaling pathway
          YI Yuguang,LIU Changping,HE Jiajia(Dept.  of  Neurosurgery,  Pingxiang  Second  People’s  Hospital,  Jiangxi
          Pingxiang 337000, China)

          ABSTRACT    OBJECTIVE  To  investigate  the  effects  of  astaxanthin  on  oxidative  stress  and  inflammatory  reaction  in  rats  with
          traumatic  brain  injury (TBI).  METHODS  Male  SD  rats  were  randomly  divided  into  sham  operation  group,  model  group,
          astaxanthin low-dose group (20 mg/kg), astaxanthin high-dose group (40 mg/kg), astaxanthin+ML385 group [astaxanthin 40 mg/kg+
          nuclear  factor-erythroid  2-related  factor  2 (Nrf2)  inhibitor  ML385  30  mg/kg],  with  14  rats  in  each  group.  Except  for  the  sham
          operation  group,  TBI  model  was  induced  by  the  modified  Feeney  free-fall  impact  method  in  other  groups.  The  rats  in  each  drug
          group  were  given  the  corresponding  drug  intragastrically  or  intraperitoneally,  and  the  rats  in  the  sham  operation  group  and  model
          group were intragastrically given a constant volume of normal saline. The neurological function of rats in each group was scored on
          the 1st, 3rd and 7th day after drug intervention; on the 7th day of drug intervention, the changes of cerebral histomorphology and
          inflammatory infiltration score were observed in each group, and the ultrastructure of nerve cells in brain tissue was also observed.
          The  contents  of  oxidative  stress  indexes  [superoxide  dismutase (SOD),  catalase (CAT),  glutathione  peroxidase (GSH-Px),
          malondialdehyde (MDA), nitric oxide (NO)] and inflammatory reaction indexes [tumor necrosis factor-α, interleukin-1β (IL-1β),
          IL-6,  inducible  nitric  oxide  synthase]  as  well  as  protein  and  mRNA  expressions  of  Nrf2,  heme  oxygenase-1 (HO-1)  and  NAD(P)H:
          quinone oxidoreductase 1 (NQO1) were detected in cerebral tissue. RESULTS Compared with the sham operation group, the brain
          edema  of  rats  in  the  model  group  was  obvious,  accompanied  by  a  large  number  of  inflammatory  cells  infiltrated,  the  shape  of
          organelles  was  damaged  and  their  number  was  reduced,  and  the  ultrastructure  of  nerve  cells  was  seriously  damaged.  The
          neurological  function  score,  the  contents  of  SOD,  CAT,  GSH-Px  and  NO  and  the  relative  expression  levels  of  Nrf2,  HO-1  and
                                                              NQO1  protein  and  mRNA  in  brain  tissue  were  significantly
              Δ 基金项目 江西省卫生健康委科技计划项目(No.202311739)
                                                              decreased,  while  the  inflammatory  infiltration  scores,  the
             *第一作者 副主任医师。研究方向:神经外科脑外伤及脑血管疾
                                                              contents  of  MDA  and  inflammatory  reaction  indexes  were
          病。电话:0799-6865427。E-mail:yyuguang2145@163.com

          · 2490 ·    China Pharmacy  2023 Vol. 34  No. 20                            中国药房  2023年第34卷第20期
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