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GW501516对低氧致肺动脉内皮细胞损伤的影响及机制                                                          Δ



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          陈昌贵 ,易春峰,余志华,王 栋,李立为,贺立群(武汉市第一医院心血管内科,武汉 430022)
          中图分类号  R965      文献标志码  A      文章编号  1001-0408(2024)02-0179-07
          DOI  10.6039/j.issn.1001-0408.2024.02.10

          摘  要  目的  探讨过氧化物酶体增殖物激活受体δ(PPARδ)激动剂GW501516对低氧诱导的肺动脉内皮细胞(PAECs)损伤的影
          响及机制。方法  通过检测PAECs的相对存活率,观察GW501516的细胞毒性作用;采用Western blot法检测PPARδ蛋白的表达水
          平。建立低氧条件下PAECs损伤的细胞模型,以抗氧化剂N-乙酰半胱氨酸(NAC)为阳性对照,通过检测细胞凋亡率、细胞活力、
          乳酸脱氢酶(LDH)活性、活性氧(ROS)水平,考察GW501516对细胞损伤及ROS产生的影响。以核因子E2相关因子2(Nrf2)激活
          剂富马酸二甲酯(DMF)为阳性对照,在低氧条件下通过 GW501516 和(或)Nrf2 抑制剂 ML385 孵育 PAECs,以细胞损伤(细胞凋
          亡、细胞活力、LDH活性)及超氧化物歧化酶(SOD)、谷胱甘肽过氧化物酶(GPx)、过氧化氢酶(CAT)、丙二醛(MDA)、ROS水平及
          Nrf2、血红素加氧酶1(HO-1)、裂解型胱天蛋白酶3(C-caspase-3)蛋白的表达水平,探讨GW501516对低氧致PAECs损伤的作用机
          制。结果  低氧刺激能够抑制PAECs内PPARδ蛋白的表达(P<0.05),而GW501516可在低氧条件下促进PPARδ蛋白的表达且无
          明显的细胞毒性作用。GW501516可抑制PAECs凋亡,提高细胞活力,降低LDH活性及ROS水平。GW501516可通过激活Nrf2
          通路,上调PAECs内HO-1蛋白表达水平及SOD、GPx、CAT水平,降低MDA、ROS水平(P<0.05),而Nrf2抑制剂ML385能够逆转
          GW501516的上述作用(P<0.05)。GW501516下调C-caspase-3蛋白表达,抑制低氧诱导的PAECs损伤的作用与Nrf2激活剂DMF
          相似(P<0.05),而Nrf2抑制剂ML385能够逆转GW501516抑制PAECs损伤的作用(P<0.05)。结论  GW501516可通过抑制氧化
          应激来减轻低氧诱导的PAECs损伤,其机制与激活Nrf2有关。
          关键词  GW501516;低氧;肺动脉内皮细胞;氧化应激;损伤;核因子E2相关因子2

          Effects  of  GW501516  on  the  injury  of  pulmonary  artery  endothelial  cells  induced  by  hypoxia  and  its
          mechanism
          CHEN Changgui,YI Chunfeng,YU Zhihua,WANG Dong,LI Liwei,HE Liqun(Dept.  of  Cardiology,  Wuhan
          No.1 Hospital, Wuhan 430022, China)

          ABSTRACT   OBJECTIVE  To  investigate  the  effects  of  the  peroxisome  proliferator-activated  receptors  δ (PPARδ)  agonist

          GW501516  on  the  injury  of  pulmonary  artery  endothelial  cells (PAECs)  induced  by  hypoxia  and  its  mechanism.  METHODS  The
          cytotoxic  effects  of  GW501516  were  observed  by  detecting  the  relative  survival  rate  of  PAECs;  the  protein  expression  of  PPARδ
          was  determined  by  Western  blot  assay.  The  cellular  model  of  PAECs  injury  was  established  under  hypoxic  conditions;  using
          antioxidant  N-acetylcysteine (NAC)  as  positive  control,  the  effects  of  GW501516  on  cell  injury  and  reactive  oxygen  species
         (ROS) production were investigated by detecting cell apoptotic rate, cell viability, lactate dehydrogenase (LDH) activity and ROS
          levels. Using nuclear factor erythroid 2-related factor 2(Nrf2) activator dimethyl fumarate (DMF) as positive control, PAECs were
          incubated with GW501516 and/or Nrf2 inhibitor ML385 under hypoxic conditions; the mechanism of GW501516 on PAECs injury
          induced by hypoxia was investigated by detecting cell injury (cell apoptosis, cell viability, LDH activity), the levels of superoxide
          dismutase (SOD), glutathione peroxidase (GPx), catalase (CAT), malondialdehyde (MDA) and ROS, the expressions of Nrf2,
          heme  oxygenase-1 (HO-1)  and  cleaved-caspase-3 (C-caspase-3)  protein.  RESULTS  The  results  demonstrated  that  hypoxia
          inhibited  the  protein  expression  of  PPARδ (P<0.05),  while  GW501516  promoted  the  protein  expression  of  PPARδ  in  hypoxia-
          exposed  PAECs  without  obvious  cytotoxic  effects.  GW501516  inhibited  the  apoptosis  of  PAECs,  improved  cell  viability,  and
          reduced  LDH  activity  and  ROS  levels.  GW501516  could  up-regulate  the  protein  expression  of  HO-1  in  PAECs  and  the  levels  of
          SOD,  GPx  and  CAT,  while  down-regulated  the  levels  of  MDA  and  ROS  by  activating  the  Nrf2  pathway (P<0.05);  but  Nrf2
                                                             inhibitor ML385 could reverse the above effects of GW501516
             Δ 基金项目 湖北省自然科学基金项目(No.2019CFB405)
             *第一作者 主治医师,博士。研究方向:肺血管重构。电话:027-               (P<0.05). GW501516 exerted similar effects to Nrf2 activator
          85332969。E-mail:chenchanggui2008@aliyun.com        DMF  in  down-regulating  the  expression  of  C-caspase-3  and
             # 通信作者 主任医师,硕士生导师,博士。研究方向:血管重构相                 inhibiting  the  injury  of  PAECs  under  conditions  of  hypoxia
          关疾病的基础与临床。电话:027-85332101。E-mail:liqunhe0902@     (P<0.05).  Moreover,  Nrf2  inhibitor  ML385  reversed  the
          163.com                                            inhibition  effects  of  GW501516  on  PAECs  injury (P<0.05).


          中国药房  2024年第35卷第2期                                                 China Pharmacy  2024 Vol. 35  No. 2    · 179 ·
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