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水飞蓟素对神经胶质瘤的体内外抑制作用及机制
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          刘 明 ,刘熙鹏,李 淳,甄 诚,刘春江,王海洋,巩建青(河北北方学院附属第一医院神经外科,河北 张家口
          075000)


          中图分类号  R965      文献标志码  A      文章编号  1001-0408(2023)16-1955-06
          DOI  10.6039/j.issn.1001-0408.2023.16.07

          摘  要  目的  探讨水飞蓟素(SM)对神经胶质瘤的体内外抑制作用及潜在机制。方法  将人神经胶质瘤细胞系U87随机分为对
          照组,低、中、高质量浓度SM组(50、100、200 μg/mL),蛋白激酶B(又称Akt)激活剂组(SC79 20 μmol/L),高质量浓度SM联合Akt
          激活剂组(SM 200 μg/mL+SC79 20 μmol/L)。经药物(对照组除外)处理后,检测各组细胞的光密度(OD)值、克隆形成率、凋亡
          率、增殖/凋亡相关蛋白[增殖细胞核抗原(PCNA)、B细胞淋巴瘤2(Bcl-2)、Bcl-2相关X蛋白(Bax)、胱天蛋白酶3(caspase-3)]的表
          达情况和Akt/促分裂原活化的蛋白激酶(MAPK)信号通路相关蛋白[Akt、p38 MAPK、胞外信号调节激酶1/2(ERK1/2)]的磷酸化
          水平。于右侧腋窝内皮下注射U87细胞建立异种移植肿瘤裸鼠模型并将其分为对照组,低、中、高剂量SM组(25、50、100 mg/kg),
          Akt激活剂组(SC79 40 mg/kg)、高剂量SM联合Akt激活剂组(SM 100 mg/kg+SC79 40 mg/kg),每组5只。经药物(裸鼠对照组除
          外)干预后,称定其瘤体质量并计算瘤体体积。结果  与对照组比较,SM各质量浓度组细胞的OD值,克隆形成率,PCNA、Bcl-2蛋
          白的表达水平,Akt、p38 MAPK、ERK1/2蛋白的磷酸化水平,以及裸鼠SM各剂量组裸鼠体内的瘤体质量及体积均显著降低/减小,
          细胞凋亡率和Bax、caspase-3蛋白的表达水平均显著升高,且均有剂量依赖性(P<0.05);Akt激活剂组上述指标的变化趋势与之
          相反(P<0.05),且Akt激活剂可明显减弱高质量浓度/高剂量SM对神经胶质瘤的体内外抑制作用(P<0.05)。结论  SM可能通过
          抑制Akt/MAPK信号通路来促进U87细胞的凋亡,抑制其增殖、克隆形成以及异种移植瘤裸鼠体内肿瘤的生长。
          关键词  水飞蓟素;神经胶质瘤;蛋白激酶B/促分裂原活化的蛋白激酶信号通路;细胞增殖;克隆形成;细胞凋亡

          Study on inhibitory effects and mechanism of silymarin on glioma in vivo and in vitro
          LIU Ming, LIU Xipeng, LI Chun, ZHEN Cheng, LIU Chunjiang, WANG Haiyang, GONG Jianqing(Dept. of
          Neurosurgery, the First Affiliated Hospital of Hebei North University, Hebei Zhangjiakou 075000, China)


          ABSTRACT     OBJECTIVE  To  investigate  the  inhibitory  effects  of  silymarin (SM)  on  glioma  in  vivo  and  in  vitro  and  its
          potential  mechanism.  METHODS  Human  glioma  cell  line  U87  cells  were  randomly  divided  into  control  group,  SM  low-
          concentration,  SM  medium-concentration  and  SM  high-concentration  groups (50,  100,  200  μg/mL),  protein  kinase  B (Akt)
          activator group (SC79 20 μmol/L), high-concentration of SM combined with Akt activator group (SM 200 μg/mL+SC79 20 μmol/L).
          After  drug  treatment (except  for  the  control  group),  optical  density (OD)  value,  clone  formation  rate,  apoptotic  rate,  the
          expressions of proliferation/apoptosis-related proteins [proliferating cell nuclear antigen (PCNA), B-cell lymphoma-2 (Bcl-2), Bcl-
          2-associated  X  protein (Bax),  caspase-3],  the  phosphorylation  levels  of Akt/mitogen-activated  protein  kinase (MAPK)  signaling
          pathway  related  proteins  [Akt,  p38  MAPK,  extracellular  signal-regulated  kinase  1/2 (ERK1/2)]  were  detected  in  each  group. The
          xenograft  tumor  model  in  nude  mice  was  established  by  injecting  U87  cells  subcutaneously  via  the  right  armpit,  and  then  divided
          into  control  group,  SM  low-dose,  SM  medium-dose  and  SM  high-dose  groups (25,  50,  100  mg/kg), Akt  activator  group (SC79
          40  mg/kg),  high-dose  of  SM  combined  with Akt  activator  group (SM  100  mg/kg+SC79  40  mg/kg),  with  5  mice  in  each  group.
          After  drug  intervention (except  for  the  control  group  of  nude  mice),  the  tumor  mass  was  weighed  and  the  tumor  volume  was
          calculated. RESULTS Compared with control group, the OD values, clone formation rates, protein expressions of PCNA and Bcl-
          2,  phosphorylation  levels  of Akt,  p38  MAPK  and  ERK1/2  in  SM  groups,  tumor  mass  and  volume  in  nude  mice  of  SM  groups
          were  all  decreased  significantly,  while  the  apoptosis  rates,  protein  expressions  of  Bax  and  caspase-3  were  increased  significantly,
          in  a  dose-dependent  manner (P<0.05);the  trend  of  changes  in  the  above  indicators  in  the Akt  activator  group  was  opposite (P<
          0.05), and Akt activator could significantly attenuate the inhibitory effect of high-concentration/high-dose SM on glioma in vivo and
          in  vitro (P<0.05).  CONCLUSIONS  SM  may  promote  the  apoptosis  of  U87  cells,  and  inhibit  its  proliferation,  clone  formation
          and tumor growth in xenograft nude mice by inhibiting Akt/MAPK signaling pathway.
                                                             KEYWORDS     silymarin;  glioma;  protein  kinase  B/mitogen-
             Δ 基金项目 河北省医学科学研究课题计划项目(No.20190883);
                                                             activated  protein  kinase  signaling  pathway;  proliferation;
          张家口市科技计划自筹经费项目(No.2021115D)
             *第一作者 副主任医师,硕士。研究方向:颅内肿瘤。E-mail:                clone formation; apoptosis
          lmltx2009@126.com


          中国药房  2023年第34卷第16期                                              China Pharmacy  2023 Vol. 34  No. 16    · 1955 ·
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