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芥子酸对 Aβ 1-42致 PC12 细胞损伤的改善作用及对 BDNF/TrkB/

        ERK信号通路的影响                       Δ


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        薛 迪 ,刘宇超 ,汪 娜 ,刘学伟 (1.齐齐哈尔医学院药学院,黑龙江 齐齐哈尔 161006;2.齐齐哈尔医学院
        科研处,黑龙江 齐齐哈尔 161006;3.齐齐哈尔医学院基础医学院,黑龙江 齐齐哈尔 161006;4.齐齐哈尔医学
        院精神卫生学院,黑龙江 齐齐哈尔 161006)
        中图分类号 R285;R741          文献标志码 A          文章编号     1001-0408(2021)10-1181-06
        DOI  10.6039/j.issn.1001-0408.2021.10.05

        摘  要   目的:研究芥子酸对β-淀粉样蛋白 1-42 (Aβ 1-42 )诱导的大鼠肾上腺髓质嗜铬细胞瘤细胞(PC12细胞)损伤的改善作用,并探
        讨其对脑源性神经营养因子(BDNF)/酪氨酸激酶B(TrkB)/细胞外信号调节激酶(ERK)信号通路的影响。方法:将PC12细胞分为
        空白组、模型组和芥子酸低、高剂量组(50、100 μmol/L)。除空白组外,其余各组均用2 μmol/L的Aβ1-42诱导细胞损伤;建模24 h后,
        药物组加入相应药液,培养24 h。观察各组细胞形态变化,检测细胞存活率和细胞中BDNF mRNA的表达情况及其蛋白水平,以
        及TrkB、ERK1/2、磷酸化ERK1/2(p-ERK1/2)蛋白的表达情况,并计算p-ERK1/2与ERK1/2的比值(p-ERK/ERK比值)。结果:与空
        白组比较,模型组细胞突触变短,细胞连接较松,贴壁性差,胞质较暗淡,胞浆中有较多颗粒,细胞存活率以及细胞中BDNF mRNA
        的相对表达量及其蛋白水平,TrkB、p-ERK1/2蛋白的相对表达量和p-ERK/ERK比值均显著降低(P<0.05或P<0.01)。与模型组
        比较,芥子酸高剂量组细胞病理变化明显改善,细胞存活率以及细胞中BDNF mRNA的相对表达量及其蛋白水平,TrkB、p-ERK蛋
        白的相对表达量和p-ERK/ERK比值均显著升高(P<0.05或P<0.01)。结论:芥子酸可改善Aβ 1-42诱导的PC12细胞损伤,其作用
        机制可能与激活BDNF/TrkB/ERK信号通路有关。
        关键词 芥子酸;阿尔茨海默症;β-淀粉样蛋白 1-42;脑源性神经生长因子;酪氨酸激酶B;细胞外信号调节激酶

        Effects of Sinapic Acid on Improving PC12 Cell Damage Induced by Aβ 1-42 and BDNF/TrkB/ERK Signaling
        Pathway
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        XUE Di ,LIU Yuchao ,WANG Na ,LIU Xuewei (1. School of Pharmacy,Qiqihar Medical University,
        Heilongjiang Qiqihar 161006,China;2. Office of Academic Research,Qiqihar Medical University,Heilongjiang
        Qiqihar 161006,China;3. School of Basic Medicine,Qiqihar Medical University,Heilongjiang Qiqihar 161006,
        China;4. School of Mental Health,Qiqihar Medical University,Heilongjiang Qiqihar 161006,China)
        ABSTRACT   OBJECTIVE:To study the improvement effects of sinapic acid(SA)on PC12 cell damage induced by Aβ 1-42,and to
        investigate its effect on brain-derived neurotrophic factor(BDNF)/tyrosine kinase B(TrkB)/extracellular signal-regulated kinase
       (ERK) signaling pathway. METHODS:PC12 cells were divided into blank group,model group,SA low-dose and high-dose
        groups(50,100 μ mol/L). Except for blank group,cell damage was induced by A β 1-42 in other groups;24 h after modeling,
        administration groups were added with the corresponding solution and cultured for 24 h. Morphological changes of cells in each
        group were observed. Cell survival rate,mRNA expression and protein level of BDNF,protein expression of TrkB,ERK1/2 and
        phosphorylated ERK1/2(p-ERK1/2)were detected. p-ERK/ERK ratio was calculated. RESULTS:Compared with blank group,the
        model group had shorter synapses,looser intercellular junctions,poor adhesion,dim cytoplasm and more granules in cytoplasm. Cell
        survival rate and mRNA expression and protein level of BDNF,the relative expression of TrkB and p-ERK1/2 protein,p-ERK/
        ERK ratio were significantly decreased(P<0.05 or P<0.01). Compared with model group,in SA high-dose group the pathological
                                                           changes of the cells were significantly improved,the survival
           Δ 基金项目:国家自然科学基金资助项目(No.81803869);黑龙江
                                                           rate of the cells,the mRNA expression and protein level of
        省自然科学基金项目(No.YQ2020H39);黑龙江省普通本科高等学校
        青年创新人才培养计划(No.UNPYSCT-2018032);黑龙江省省属高等            BDNF,the relative expression of TrkB and p-ERK1/2 protein,
        学校基本科研业务费科研项目(No.2017-KYYWF-0697);齐齐哈尔医            p-ERK/ERK ratio were significantly increased(P<0.05 or P<
        学科学院博士专项科研基金项目(No.QMSI2017B-10)                    0.01). CONCLUSIONS:SA can improve PC12 cells damage
           *研究实习员,硕士。研究方向:天然药物防治神经退行性疾病                    induced by Aβ 1-42,the mechanism of which may be associated
        的活性成分筛选及作用机制。电话:0452-2663615。E-mail:282832817@
                                                           with activating BDNF/TrkB/ERK signaling pathway.
        qq.com
                                                           KEYWORDS     Sinapic acid;Alzheimer’s disease;A β 1-42;
           # 通信作者:研究员,硕士生导师,博士。研究方向:天然药物防
                                                           Brain-derived  neurotrophic  factor; Tyrosine  kinase  B;
        治神经退行性疾病机制及活性成分。电话:0452-2663804。E-mail:
                                                           Extracellular signal-regulated kinase
        lxw_qmu@126.com
        中国药房    2021年第32卷第10期                                            China Pharmacy 2021 Vol. 32 No. 10  ·1181 ·
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