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·药学研究·


          7-羟乙基白杨素对低压缺氧致PC12细胞损伤的改善作用及机制                                                                    Δ


          张冬梅 ,高迎春,张 洁,景临林,马慧萍(联勤保障部队第九四〇医院药剂科/全军高原医学实验室,兰州
                                                 #
                *
          730050)

          中图分类号  R966      文献标志码  A      文章编号  1001-0408(2023)04-0402-06
          DOI  10.6039/j.issn.1001-0408.2023.04.04

          摘   要  目的  探讨7-羟乙基白杨素(7-HEC)对低压缺氧致PC12细胞损伤的改善作用及可能机制。方法  以大鼠肾上腺嗜铬细
          胞瘤细胞系 PC12 为对象,以低压缺氧(5%CO2、94%N2、1%O2、54 004 Pa)条件培养,考察不同浓度 7-HEC(100、10、1、0.1、0.01
          μmol/L)对低压缺氧细胞存活率的影响;检测7-HEC(1 μmol/L)对低压缺氧细胞中乳酸脱氢酶(LDH)、丙二醛(MDA)含量和超氧
          化物歧化酶(SOD)活性,凋亡率,周期,以及细胞中活化的胱天蛋白酶3(cleaved caspase-3)、B细胞淋巴瘤2(Bcl-2)、Bcl-2相关X
          蛋白(Bax)表达的影响。结果  与对照组比较,低压缺氧组细胞的存活率显著降低(P<0.01);10、1、0.1 μmol/L的7-HEC可逆转低
          压缺氧导致的细胞存活率降低(P<0.05或P<0.01)。与对照组比较,低压缺氧组细胞上清液中LDH含量、细胞中MDA含量、凋
          亡率、G1期细胞比例和细胞中cleaved caspase-3蛋白的表达水平均显著升高;细胞中SOD活性,S期、G2期细胞比例和细胞中Bcl-2/
          Bax 比值均显著降低(P<0.05 或 P<0.01)。与低压缺氧组比较,7-HEC 组细胞中 LDH、MDA 含量,凋亡率,G1期细胞比例和
          cleaved caspase-3蛋白的表达水平均显著降低;SOD活性、G2期细胞比例、Bcl-2/Bax比值均显著升高(P<0.01)。结论  7-HEC可明
          显提高低压缺氧细胞的存活率,降低上清液中LDH含量,改善细胞周期阻滞,降低细胞凋亡率;其对低压缺氧细胞损伤的改善作
          用可能与抑制caspase-3/Bax/Bcl-2通路的激活有关。
          关键词  7-羟乙基白杨素;PC12细胞;低压缺氧;细胞凋亡;caspase-3/Bax/Bcl-2通路

          Investigation on improvement effects and mechanism of 7-hydroxyethyl chrysin on PC12 cell injury induced
          by hypobaric hypoxia
          ZHANG Dongmei,GAO Yingchun,ZHANG Jie,JING Linlin,MA Huiping(Dept.  of  Pharmacy,  the  940th
          Hospital  of  Joint  Logistics  Support  Force  of  PLA/Lab  of  PLA  for  High  Altitude  Medicine,  Lanzhou  730050,
          China)

          ABSTRACT    OBJECTIVE  To  investigate  the  improvement  effects  and  possible  mechanism  of  7-hydroxyethyl  chrysin (7-HEC)
          on  PC12  cell  injury  induced  by  hypobaric  hypoxia.  METHODS  The  rat  adrenal  pheochromocytoma  cell  line  PC12  was  cultured
          under  low-pressure  hypoxia (5%CO2,  94%N2,  1%O2,  54  004  Pa)  to  investigate  the  different  concentrations  of  7-HEC (100,  10,
          1,  0.1,  0.01  μmol/L)  on  the  survival  rate  of  hypoxic  cells;  the  effects  of  7-HEC(1  μmol/L)  on  the  contents  of  lactate
          dehydrogenase (LDH)  and  malondialdehyde (MDA),  superoxide  dismutase (SOD)  activity,  apoptotic  rate,  cell  cycle,  and  the
          expressions of cleaved caspase-3, Bcl-2 and Bax were detected. RESULTS Compared with control group, the survival rate of cells
          in  hypobaric  hypoxia  group  was  decreased  significantly (P<0.01);  10,  1,  0.1  μmol/L  7-HEC  could  reverse  the  decrease  of  cell
          survival  rate  caused  by  hypobaric  hypoxia (P<0.05  or  P<0.01).  Compared  with  control  group,  LDH  content  in  supernatant,
          MDA  content  in  cells,  apoptotic  rate,  the  proportion  of  cells  at  G1  stage  and  the  protein  expression  of  cleaved  caspase-3  were
          increased significantly in hypobaric hypoxia group, while SOD activity in cells, the proportion of cells at S stage and G2 stage and
          Bcl-2/Bax ratio were decreased significantly (P<0.05 or P<0.01). Compared with hypobaric hypoxia group, the contents of LDH
          and  MDA,  apoptotic  rate,  the  proportion  of  cells  at  G1  stage  and  the  expression  of  cleaved  caspase-3  in  7-HEC  group  were
          decreased significantly, while SOD activity, the proportion of cells at G2 stage and Bcl-2/Bax ratio were increased significantly (P<
          0.01).  CONCLUSIONS  7-HEC  can significantly increase the survival rate of  hypobaric hypoxia cells,  reduce the LDH  content in
                                                              supernatant,  improve  cell  cycle  arrest,  and  reduce  the  rate  of
              Δ 基金项目 国家自然科学基金资助项目(No.81872796);甘肃省
                                                              apoptosis.  Its  improvement  effects  on  hypobaric  hypoxia  cell
          科技计划资助项目(No.22JR11RA014);第九四〇医院院内科研项目
                                                              injury  may  be  related  to  the  inhibition  of  caspase-3/Bax/Bcl-2
         (No.2021yxky046,No.2022yxky004)
                                                              pathway activation.
             *第一作者 主管药师,硕士。研究方向:高原缺氧损伤分子机制。
          E-mail:835935150@qq.com                             KEYWORDS    7-hydroxyethyl   chrysin;   PC12   cells;
              # 通信作者 主任药师,教授,硕士生导师。研究方向:高原缺氧损                 hypobaric  hypoxia;  cell  apoptosis;  caspase-3/Bax/Bcl-2
          伤机制及新药研发。E-mail:1026573411@qq.com                   pathway


          · 402 ·    China Pharmacy  2023 Vol. 34  No. 4                               中国药房  2023年第34卷第4期
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