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延胡索乙素改善PDGF-BB诱导的VSMCs氧化应激损伤的机制
                                                                                                          Δ


          陈文明 ,蹇明辉(遵义医科大学附属医院心血管内科,贵州 遵义 563000)
                *

          中图分类号  R965;R543      文献标志码  A      文章编号  1001-0408(2024)15-1855-07
          DOI  10.6039/j.issn.1001-0408.2024.15.10

          摘  要  目的  研究延胡索乙素(Thp)对血小板衍生生长因子-BB(PDGF-BB)诱导的大鼠主动脉血管平滑肌细胞(VSMCs)氧化
          应激损伤的保护作用,并基于核因子红系2相关因子2(Nrf2)/血红素加氧酶1(HO-1)信号通路探究其可能机制。方法  在Thp抑
          制PDGF-BB诱导的VSMCs氧化应激损伤效应研究中,将VSMCs分为对照组、PDGF-BB组(25 ng/mL)及Thp低、中、高浓度组(5、
          10、20 mg/mL)。在Thp作用机制研究(沉默Nrf2)中,将VSMCs分为PDGF-BB+阴性对照siRNA(NC-siNrf2)组(25 ng/mL PDGF-
          BB+NC-siNrf2),PDGF-BB+Thp+NC-siNrf2 组(25  ng/mL  PDGF-BB+10  mg/mL Thp+NC-siNrf2),PDGF-BB+Nrf2 小 干 扰 RNA
         (siNrf2)组(25 ng/mL PDGF-BB+siNrf2),PDGF-BB+Thp+siNrf2 组(25 ng/mL PDGF-BB+10.0 mg/mL Thp+siNrf2)。2 个实验均检
          测 VSMCs 的增殖、迁移能力,活性氧(ROS)水平,超氧化物歧化酶(SOD)和过氧化氢酶(CAT)活性以及 Nrf2 和 HO-1 蛋白表
          达。结果  与对照组比较,PDGF-BB组VSMCs的增殖、迁移能力显著增强(P<0.01),ROS水平显著升高(P<0.01),SOD、CAT活
          性及Nrf2、HO-1蛋白的相对表达量均显著降低(P<0.01);与PDGF-BB组比较,Thp不同浓度组VSMCs的增殖、迁移能力均显著
          下降(P<0.01),ROS 水平均显著降低(P<0.01),SOD、CAT 活性及 Nrf2、HO-1 蛋白的相对表达量均显著升高(P<0.01)。沉默
          Nrf2可显著逆转Thp对PDGF-BB诱导VSMCs氧化应激损伤的改善作用(P<0.01)。结论  Thp可以通过激活Nrf2介导的抗氧化
          防御途径来降低VSMCs的氧化应激水平,从而抑制VSMCs的增殖、迁移。
          关键词  延胡索乙素;血小板衍生生长因子-BB;血管平滑肌细胞;Nrf2/HO-1信号通路;氧化应激


          Mechanism of tetrahydropalmatine inhibiting oxidative stress damage of VSMCs induced by PDGF-BB
          CHEN Wenming,JIAN Minghui(Dept.  of  Cardiovascular  Medicine,  the  Affiliated  Hospital  of  Zunyi  Medical
          University, Guizhou Zunyi 563000, China)

          ABSTRACT   OBJECTIVE  To  study  the  protective  effect  of  tetrahydropalmatine (Thp)  on  platelet-derived  growth  factor-BB
         (PDGF-BB)  induced  oxidative  stress  injury  in  vascular  smooth  muscle  cells (VSMCs)  of  rats,  and  to  explore  its  possible
          mechanism based on the nuclear factor-erythroid 2-related factor 2 (Nrf2)/heme oxygenase (HO-1) signaling pathway. METHODS
          In  the  study  about  Thp  inhibiting  PDGF-BB-induced  oxidative  stress  injury  in  VSMCs,  VSMCs  were  divided  into  control  group,
          PDGF-BB group (25 ng/mL), and Thp low-concentration, medium-concentration and high-concentration groups (5, 10, 20 mg/mL).
          In the Thp mechanism experiment (silencing Nrf2), VSMCs were divided into PDGF-BB+negative control of siRNA (NC-siNrf2)
          group (25  ng/mL  PDGF-BB+NC-siNrf2),  PDGF-BB+Thp+NC-siNrf2  group (25  ng/mL  PDGF-BB+10  mg/mL  Thp+NC-siNrf2),
          PDGF-BB+Nrf2 small interfering RNA (siNrf2) group (25 ng/mL PDGF-BB+siNrf2) and PDGF-BB+Thp+siNrf2 group (25 ng/mL
          PDGF-BB+10.0  mg/mL Thp+siNrf2). The  proliferative  and  migratory  capabilities  of VSMCs,  the  level  of  reactive  oxygen  species
         (ROS), the activities of superoxide dismutase (SOD) and catalase (CAT) as well as the protein expressions of Nrf2 and HO-1 in
          VSMCs  were  all  detected  in  two  experiments.  RESULTS  Compared  with  the  control  group,  the  proliferative  and  migratory
          capabilities of VSMCs in the PDGF-BB group were significantly enhanced (P<0.01), and the level of ROS significantly increased
         (P<0.01),  while  the  activities  of  SOD  and  CAT,  and  the  relative  expressions  of  Nrf2  and  HO-1  protein  significantly  decreased
         (P<0.01).  Compared  with  the  PDGF-BB  group,  the  proliferative  and  migratory  capabilities  of  VSMCs  in  the  Thp  groups  at
          different concentrations were significantly reduced (P<0.01), the levels of ROS were significantly reduced, while the activities of
          SOD  and  CAT,  and  relative  expressions  of  Nrf2  and  HO-1  were  significantly  enhanced (P<0.01).  Silencing  Nrf2  significantly
          reversed  the  improvement  of  Thp  on  the  oxidative  stress  damage  of  VSMCs  induced  by  PDGF-BB (P<0.01).  CONCLUSIONS
          Thp  can  reduce  the  oxidative  stress  level  of  VSMCs  by  activating  the  Nrf2-mediated  antioxidant  defense  pathway,  thereby
                                                             inhibiting the proliferation and migration of VSMCs.
             Δ 基金项目 遵义市科技计划项目[No.遵市科合HZ字(2020)227            KEYWORDS
          号,No.遵市科合HZ字(2021)51号]                                          tetrahydropalmatine;  platelet-derived  growth
             *第一作者 高级实验师,硕士。研究方向:冠心病发病机制及药                   factor-BB;  vascular  smooth  muscle  cells;  Nrf2/HO-1  signaling
          物干预。E-mail:254936118@qq.com                        pathway; oxidative stress


          中国药房  2024年第35卷第15期                                              China Pharmacy  2024 Vol. 35  No. 15    · 1855 ·
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