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紫花牡荆素对浅Ⅱ度烧伤大鼠创面愈合的影响及机制研究
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          张国辉    1, 2, 3* ,张海博 ,曹东升 (1.安徽医科大学第二附属医院整形与创面修复外科,合肥 230601;2.安徽医
          科大学第二临床医学院,合肥 230601;3.滨州医学院附属医院美容医学部,山东 滨州 256603)

          中图分类号  R965;R285      文献标志码  A      文章编号  1001-0408(2024)21-2603-06
          DOI  10.6039/j.issn.1001-0408.2024.21.05

          摘  要  目的  基于磷脂酰肌醇 3-激酶(PI3K)/蛋白激酶 B(AKT)/哺乳动物雷帕霉素靶蛋白(mTOR)信号通路探究紫花牡荆素
         (CAS)促进大鼠浅Ⅱ度烧伤创面愈合的作用机制。方法  将大鼠随机分为对照组(生理盐水),模型组(5%羧甲基纤维素钠空白基
          质),CAS 低、高剂量组(15 mL 浓度为 30、60 mmol/L 的 CAS 药液),CAS 高剂量+LY294002 组[15 mL CAS 药液(60 mmol/L)和
          PI3K抑制剂LY294002溶液(20 μmmol/L)的混合溶液]和阳性对照组(厚涂京万红软膏0.5~1.0 cm),每组15只。除对照组外,其
          余各组均通过点燃皮肤表面混合烧伤燃料来构建浅Ⅱ度烧伤大鼠模型,并于烧伤后2 h内涂抹给药。给药28 d后,计算大鼠烧伤
          创面愈合率,观察大鼠烧伤创面中央组织病理变化,检测大鼠血清中肿瘤坏死因子α(TNF-α)、白细胞介素1β(IL-1β)、IL-6和基质
          金属蛋白酶2(MMP-2)、MMP-9、血管内皮生长因子(VEGF)水平,检测大鼠烧伤组织中PI3K/AKT/mTOR信号通路相关蛋白的磷
          酸化水平。结果  与对照组比较,模型组大鼠皮肤组织表皮层和真皮浅层损伤、愈合状态较差,存在炎症细胞浸润且组织结构不完
          整等情况;血清中 IL-6、IL-1β、TNF-α、MMP-2、MMP-9 水平均显著升高(P<0.05),血清中 VEGF 水平和烧伤创面中央组织中
          PI3K、AKT、mTOR蛋白的磷酸化水平均显著降低(P<0.05);与模型组比较,CAS低、高剂量组大鼠上述病理变化及血清和烧伤创
          面中央组织中上述指标水平均显著逆转(P<0.05),且CAS高剂量组上述指标的变化较CAS低剂量组更明显(P<0.05);PI3K抑
          制剂LY294002的加入可逆转CAS对大鼠浅Ⅱ度烧伤创面愈合的促进作用(P<0.05)。结论  CAS可促进大鼠浅Ⅱ度烧伤创面的
          愈合,其作用机制可能与激活PI3K/AKT/mTOR信号通路有关。
          关键词  紫花牡荆素;浅Ⅱ度烧伤;创面愈合;PI3K/AKT/mTOR信号通路

          Effect and mechanism of casticin on wound healing in rats with superficial second-degree burn
          ZHANG Guohui  1, 2, 3 ,ZHANG Haibo ,CAO Dongsheng (1.  Dept.  of  Plastic  and  Wound  Repair  Surgery,  the
                                                           1, 2
                                          3
          Second  Hospital  of  Anhui  Medical  University,  Hefei  230601,  China;2.  The  Second  School  of  Clinical
          Medicine, Anhui  Medical  University,  Hefei  230601,  China;3.  Dept.  of  Cosmetic  Medicine,  Binzhou  Medical
          University Hospital, Shandong Binzhou 256603, China)

          ABSTRACT   OBJECTIVE  To  explore  the  mechanism  by  which  casticin (CAS)  promotes  wound  healing  in  superficial  second-
          degree burned rats through phosphatidylinositol 3-kinase (PI3K)/protein kinase B (AKT)/mammalian target of rapamycin (mTOR)
          signaling pathway. METHODS Rats were randomly assigned to a control group (physiological saline), a model group (5% sodium
          carboxymethyl  cellulose  blank  matrix),  low-  and  high-dose  CAS  groups (15  mL  of  CAS  solution  at  concentrations  of  30  and  60
          mmol/L,  respectively),  a  high  dose  CAS  plus  LY294002  group  [a  mixture  of  15  mL  CAS  solution (60  mmol/L)  and  PI3K
          inhibitor  LY294002  solution (20  μmmol/L)],  and  a  positive  control  group (thick  application  of  Jingwanhong  ointment  0.5-1.0
          cm), with 15 rats in each group. Except for the control group, the other groups were subjected to a superficial second-degree burn
          rat model by igniting a mixture of burn fuel on the skin surface, and the administration was applied topically within two hours after
          the burn. After 28 days of administration, the wound healing rate of the burned rats was calculated, the histopathological changes in
          the central tissue of the rat’s burned wound were observed, and the levels of tumor necrosis factor α (TNF-α), interleukin-1β (IL-
          1β), IL-6, matrix metalloproteinase-2 (MMP-2), MMP-9 and vascular endothelial growth factor (VEGF) in the serum of rat were
          detected. The  phosphorylation  levels  of  related  proteins  in  the  PI3K/AKT/mTOR  signaling  pathway  in  the  burned  tissue  of  the  rats
          were  also  detected.  RESULTS  Compared  with  the  control  group,  the  rats  in  the  model  group  showed  epidermal  and  superficial
                                                             dermal  damage  in  skin  tissue,  poor  healing  status,
             Δ 基金项目 安徽省自然科学基金面上项目(No.1808085MH282)           inflammatory  cell  infiltration,  and  incomplete  tissue  structure.
             *第一作者 副主任医师,博士研究生。研究方向:烧伤整形与医                   The  levels  of  IL-6,  IL-1β,  TNF- α,  MMP-2  and  MMP-9  in
          学美容。电话:0543-3258462
                                                             the  serum  were  significantly  increased (P<0.05),  and  the
             # 通信作者 主任医师,教授,博士生导师。研究方向:医学美容、
          创面修复、血管瘤发生发展及治疗机制。电话:0551-63869597。                levels of VEGF in the serum and the phosphorylation levels of
          E-mail:caodongsheng@ahmu.edu.cn                    PI3K,  AKT,  mTOR  proteins  in  the  central  tissue  of  the


          中国药房  2024年第35卷第21期                                              China Pharmacy  2024 Vol. 35  No. 21    · 2603 ·
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