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紫丹酸B对糖尿病肾病模型小鼠糖代谢和肾功能的改善作用及

          机制
                 Δ


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          刘五梅    1, 2* ,刘永飞 ,彭 林 ,张海红 ,郭琦丽 ,卢 晶 (1.南昌医学院药学院,南昌 330052;2.江西
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          卫生职业学院药学系,南昌 330052)
          中图分类号  R965      文献标志码  A      文章编号  1001-0408(2023)23-2855-06
          DOI  10.6039/j.issn.1001-0408.2023.23.07

          摘  要  目的  研究紫丹酸B(TAB)对糖尿病肾病模型小鼠糖代谢和肾功能的改善作用及机制。方法  采用高脂饮食联合链脲佐
          菌素建立糖尿病肾病模型小鼠,然后随机分为模型组、阳性对照组(维生素E,20 mg/kg)和TAB低、中、高剂量组(1、2、4 mg/kg),每
          组12只;另设给予普通饮食的正常对照组。各组小鼠灌胃相应药物或生理盐水,每天1次,连续4周。采用葡萄糖耐量实验、胰岛
          素耐量实验以及空腹血糖和血清胰岛素含量评估小鼠糖代谢功能;检测小鼠肾脏系数和肾功能相关生化指标[血清中尿酸、血尿
          素氮、肌酐水平和尿微量白蛋白与肌酐比值];检测小鼠肾组织中氧化应激相关生化指标[超氧化物歧化酶(SOD)、谷胱甘肽过氧
          化物酶(GSH-Px)、丙二醛(MDA)、8-羟基脱氧鸟苷(8-OHdG)]的含量;观察小鼠肾组织的病理形态;检测小鼠肾组织中细胞外基
          质(ECM)沉积相关因子[转化生长因子β1 (TGF-β1 )、纤维连接蛋白(Fn)、Ⅳ型胶原蛋白(Col Ⅳ)]及蛋白激酶B(Akt)/核因子E2相
          关因子2(Nrf2)/血红素加氧酶1(HO-1)信号通路相关蛋白的表达水平。结果  与正常对照组比较,模型组小鼠空腹血糖、葡萄糖
          耐量曲线下面积(AUC)、胰岛素耐量AUC、血清胰岛素含量,血清中尿酸、尿素氮、肌酐水平和尿微量白蛋白与肌酐比值,肾组织
          中 MDA、8-OHdG 含量和 TGF-β1、Fn、Col Ⅳ蛋白表达水平均显著升高(P<0.05);肾组织中 SOD、GSH-Px 含量以及 p-Akt、Nrf2、
          HO-1 蛋白表达水平均显著降低(P<0.05);基底膜增厚、系膜基质堆积、肾小球硬化、肾小管间质纤维化明显。与模型组比较,
          TAB各剂量组小鼠上述指标水平均显著逆转(P<0.05),病理改变减轻,且呈剂量依赖性。结论  TAB可改善糖尿病肾病模型小鼠
          糖代谢和肾功能,减轻肾小管间质纤维化;其作用机制可能与激活Akt/Nrf2/HO-1信号通路,抑制ECM沉积,拮抗高糖诱导的氧化
          应激有关。
          关键词  紫丹酸B;糖尿病肾病;氧化应激;纤维化;Akt/Nrf2/HO-1信号通路

          Effect and mechanism of tournefolic acid B on the improvement of glucose metabolism and renal function
          in diabetes nephropathy model mice
          LIU Wumei ,LIU Yongfei ,PENG Lin ,ZHANG Haihong ,GUO Qili ,LU Jing (1.  School  of
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          Pharmacy,  Nanchang  Medical  University,  Nanchang  330052,  China;2.  Dept.  of  Pharmacy,  Jiangxi  Health
          Vocational College, Nanchang 330052, China)
          ABSTRACT   OBJECTIVE  To  explore  the  role  and  underlying  mechanism  of  tournefolic  acid  B (TAB)  on  the  improvement  of
          glucose metabolism and renal function in diabetic nephropathy (DN) model mice. METHODS DN model mice were established by
          high-fat  diet  combined  with  streptozotocin,  and  then  randomly  divided  into  model  group,  positive  control  group (vitamin  E,  20
          mg/kg), TAB low-dose, medium-dose and high-dose groups (1, 2, 4 mg/kg), with 12 mice in each group; normal control group
          was  given  regular  diet.  Each  group  was  given  relevant  medicine  or  normal  saline  intragastrically,  once  a  day,  for  4  consecutive
          weeks.  The  glucose  metabolic  function  was  estimated  by  fasting  blood  glucose,  glucose  tolerance  test,  insulin  tolerance  test  and
          serum insulin concentration. The renal coefficients and biochemical indicators related to renal function [serum uric acid, blood urea
          nitrogen,  creatinine  levels,  and  ratio  of  urine  microalbumin  to  creatinine]  were  detected  in  mice;  the  contents  of  biochemical
          indicators  related  to  oxidative  stress  [superoxide  dismutase (SOD),  glutathione  peroxidase (GSH-Px),  malondialdehyde (MDA),
          8-hydroxydeoxyguanosine (8-OHdG)]  were  determined  in  renal  tissue  of  mice;  the  pathological  morphology  of  renal  tissue  was
          observed;  the  expressions  of  extracellular  matrix (ECM)  deposition  related  factors  [transforming  growth  factor  β1 (TGF-  β1 ),
          fibronectin (Fn),  type  Ⅳ  collagen (Col  Ⅳ)]  and  protein  kinase  B (Akt)/nuclear  factor  erythroid  2-related  factor  2 (Nrf2)/heme
          oxygenase-1 (HO-1)  pathway  related  proteins  were  determined  in  renal  tissue  of  mice.  RESULTS  Compared  with  normal  control
                                                             group,  fasting  blood  glucose,  area  under  glucose  tolerance
                                                             curve,  area  under  insulin  tolerance  curve,  serum  insulin
             Δ 基金项目 江西省教育厅科学技术研究项目(No.GJJ2208214)
             *第一作者 讲师,硕士。研究方向:药理学。E-mail:2300616634          content,  the  levels  of  uric  acid,  urea  nitrogen  and  creatinine
          @qq.com                                            and  ratio  of  urinary  microalbumin  to  creatinine  in  serum,  the


          中国药房  2023年第34卷第23期                                              China Pharmacy  2023 Vol. 34  No. 23    · 2855 ·
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