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柠檬苦素对大鼠肝纤维化的影响及机制初探
                                                                              Δ


          肖玉洪 ,安祯祥 (1.贵州中医药大学第一临床医学院,贵阳 550002;2.贵州中医药大学第一附属医院消化
                           2 #
                 1*
          内科,贵阳 550001)

          中图分类号  R965      文献标志码  A      文章编号  1001-0408(2022)24-2968-05
          DOI  10.6039/j.issn.1001-0408.2022.24.05

          摘   要  目的  探讨柠檬苦素对大鼠肝纤维化的影响及机制。方法  将 42 只 SD 雄性大鼠随机分为正常组、模型组、阳性对照组
         (秋水仙碱0.1 mg/kg)和柠檬苦素低、高剂量组(12.5、50 mg/kg),正常组和模型组各9只,其余组各8只。除正常组外,采用四氯化
          碳构建肝纤维化模型。造模成功后,正常组及模型组灌胃水,其余各组灌胃相应药物,每日1次,持续4周。末次给药后,采用酶联
          免疫吸附测定法检测各组大鼠血清中丙氨酸转氨酶(ALT)、天冬氨酸转氨酶(AST)、透明质酸(HA)、层粘连蛋白(LN)含量;采用
          苏木精-伊红(HE)及 Masson 染色观察肝组织形态和肝纤维化变化;采用 Western blot 法检测肝组织中蛋白激酶 B(Akt)、磷酸化
          Akt(p-Akt)、E-钙黏蛋白(E-cadherin)、波形蛋白(vimentin)蛋白表达水平,并计算p-Akt/Akt比值。结果  与正常组比较,模型组大
          鼠血清ALT、AST、HA、LN含量均显著升高(P<0.01),HE及Masson染色均观察到肝组织有大量纤维组织增生,肝组织中Akt、p-
          Akt、vimentin 蛋白表达水平及 p-Akt/Akt 比值均显著升高(P<0.01),E-cadherin 蛋白表达水平显著降低(P<0.01)。与模型组比
          较,柠檬苦素低、高剂量组大鼠肝组织的纤维增生程度均有所减轻,除柠檬苦素低剂量组的LN、E-cadherin指标外其余指标均显著
          逆转(P<0.05或P<0.01)。结论  柠檬苦素能改善大鼠肝纤维化,作用机制可能与抑制Akt磷酸化及逆转上皮间质转化进程有关。
          关键词  柠檬苦素;肝纤维化;上皮间质转化;大鼠


          Effect of limonin on liver fibrosis in rats and preliminary exploration of its mechanism
                       1
                                       2
          XIAO Yuhong ,AN Zhenxiang (1.  The  First  Clinical  Medical  College,  Guizhou  University  of  Traditional
          Chinese  Medicine,  Guiyang  550002,  China;2.  Dept.  of  Gastroenterology,  the  First  Affiliated  Hospital  of
          Guizhou University of Traditional Chinese Medicine, Guiyang 550001, China)

          ABSTRACT    OBJECTIVE  To  explore  the  effect  and  mechanism  of  limonin  on  liver  fibrosis  in  rats.  METHODS  Forty-two  SD
          male rats were randomly divided into normal group, model group, positive control group (colchicine, 0.1 mg/kg), low-dose group
          of limonin (12.5 mg/kg) and high-dose group of limonin (50 mg/kg), with 9 rats in normal group and model group, and 8 rats in
          other  groups.  Except  for  normal  group,  the  model  of  liver  fibrosis  was  established  by  carbon  tetrachloride. After  modeling,  normal
          group  and  model  group  were  given  distilled  water  intragastrically,  and  administration  groups  were  given  relevant  medicine
          intragastrically,once  a  day,for  consecutive  4  weeks.  After  the  last  medication,  the  serum  contents  of  alanine  aminotransferase
         (ALT),  aspartate  aminotransferase (AST),  hyaluronic  acid (HA)  and  laminin (LN)  in  rats  were  detected  by  enzyme-linked
          immunosorbent assay (ELISA) method. HE and Masson staining were used to observe the pathological changes and fibrotic change
          of  liver  tissue.  Western  blot  assay  was  used  to  detect  the  protein  expressions  of  protein  kinase  B (Akt),  phosphorylated-protein
          kinase B (p-Akt), E-cadherin and vimentin in liver tissue; ratio of p-Akt/Akt was calculated. RESULTS Compared normal group,
          the serum contents of ALT, AST, HA and LN in rats were all increased significantly in model group (P<0.01); HE and Masson
          staining showed that a large number of fibrous tissue hyperplasia, protein expressions of Akt, p-Akt and vimentin as well as p-Akt/
          Akt  ratio  in  liver  tissue  were  significantly  increased (P<0.01),  while  E-cadherin  protein  expression  was  significantly  decreased
         (P<0.01). Compared with model group, the degree of fibrosis hyperplasia in liver tissue was relieved in high-dose group and low-
          dose  group  of  limonin,  and  other  indexes  were  all  reversed  significantly  except  for  LN  and  E-cadherin  in  the  low-dose  group  of
                                                              limonin (P<0.01  or  P<0.05).  CONCLUSIONS  Limonin  can
              Δ 基金项目 国 家 自 然 科 学 基 金 资 助 项 目(No. 82160893,No.
                                                              improve liver fibrosis in rats, the mechanism of which may be
          81760865);国家中医药管理局第五批全国中医临床优秀人才研修项
                                                              related  to  the  inhibition  of Akt  phosphorylation  and  reversal  of
          目(No.国中医药人教函〔2022〕1号)
             *第一作者 硕士研究生。研究方向:中西医结合防治消化系统疾                    epithelial-mesenchymal transition process.
          病的基础及临床研究。E-mail:paulhsiao2021@163.com              KEYWORDS    limonin;  liver  fibrosis;  epithelial-mesenchymal
              # 通信作者 主任医师,教授,博士生导师,博士。研究方向:中西                 transition; rat
          医 结 合 防 治 消 化 系 统 疾 病 的 基 础 及 临 床 研 究 。 E-mail:
          407206115@qq.com


          · 2968 ·    China Pharmacy  2022 Vol. 33  No. 24                            中国药房  2022年第33卷第24期
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