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双去甲氧基姜黄素对小鼠脑神经母瘤细胞的促神经分化作用及

          机制研究
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          王嘉欣 ,房红志 ,吴 敏 ,阳泽界 ,许文博 ,张 双 ,李莎莉 ,唐根云                            1, 2, 3 # (1.南华大学衡阳医学院细胞与遗
                 1*
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          传研究所,湖南 衡阳 421001;2.湖南医药学院基础医学院,湖南 怀化 418000;3.脑与神经内分泌疾病湖南
          省高等学校重点实验室,湖南 怀化 418000)
          中图分类号  R965      文献标志码  A      文章编号  1001-0408(2024)05-0578-06
          DOI  10.6039/j.issn.1001-0408.2024.05.12
          摘   要  目的  研究姜黄素衍生物双去甲氧基姜黄素(BC)对小鼠脑神经母瘤细胞 Neuro-2a(N2a)的促神经分化作用及机制。
          方法  采用MTT法检测BC(1、2、4、6、8、10 μmol/L)对N2a细胞存活率的影响,确定药物处理浓度范围。设对照组、视黄酸(RA)组
         (10 μmol/L)和BC组(1、2、4 μmol/L),培养48、72 h后,对分化细胞的神经突起长度进行测量并计算细胞分化率;采用Western blot
          法检测4 μmol/L BC作用5、15、30、60、120 min后细胞中蛋白激酶B(Akt)、细胞外调节蛋白激酶1/2(ERK1/2)、p38丝裂原活化蛋
          白激酶(p38)蛋白的磷酸化水平。以抑制剂LY294002(LY)和PD98059(PD)干预后,进一步验证BC对Akt和ERK蛋白磷酸化水
          平及促神经分化的影响。结果  根据MTT实验确定后续诱导细胞分化的BC浓度为1、2、4 μmol/L。分化48 h后,与对照组比较,
          RA组和BC 1、2、4 μmol/L组细胞分化率及BC 4 μmol/L组细胞神经突起长度均显著升高/增加(P<0.05或P<0.01);BC继续诱导
          分化至72 h后,与对照组比较,RA组细胞分化率和神经突起长度、BC 4 μmol/L组细胞分化率和BC 2 μmol/L组细胞神经突起长
          度均显著升高/增加(P<0.05或P<0.01)。与0 min组比较,BC 4 μmol/L作用5、15、30、60、120 min组细胞中Akt、ERK1/2、p38蛋
          白的磷酸化水平均有不同程度升高,部分差异有统计学意义(P<0.05或P<0.01)。加入抑制剂LY/PD后,与BC组比较,PD+BC
          组细胞中 ERK1/2 蛋白的磷酸化水平显著降低(P<0.01),LY 组、LY+BC 组、PD 组、PD+BC 组细胞分化率均显著降低(P<0.01)。
          结论  BC可以促进N2a细胞分化,增加细胞分化率和神经突起长度,其机制可能与激活MEK/ERK和PI3K/Akt信号通路有关。
          关键词  双去甲氧基姜黄素;脑神经母瘤细胞;促神经分化;阿尔茨海默病;神经营养活性

          Effects of bisdemethoxycurcumin promoting neuronal differentiation of neuroblastoma cells in mice and its
          mechanism
          WANG Jiaxin ,FANG Hongzhi ,WU Min ,YANG Zejie ,XU Wenbo ,ZHANG Shuang ,LI Shali ,TANG
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          Genyun 1, 2, 3 (1.  Institute  of  Cytology  and  Genetics,  Hengyang  Medical  School,  University  of  South  China,
          Hunan Hengyang 421001, China;2. School of Basic Medicine, Hunan University of Medicine, Hunan Huaihua
          418000,  China;3.  Key  Laboratory  of  Brain  and  Neuroendocrine  Diseases,  Colleges  of  Hunan  Province,  Hunan
          Huaihua 418000, China)
          ABSTRACT    OBJECTIVE  To  study  the  effects  of  the  curcumin  derivative  bisdemethoxycurcumin (BC)  promoting  neuronal
          differentiation of neuroblastoma cells Neuro-2a (N2a) in mice and its mechanism. METHODS The effects of BC (1, 2, 4, 6, 8,
          10 μmol/L) on the viability of N2a cells were detected by MTT assay to determine the concentration range of drug treatment. The
          control group, retinoic acid (RA) group (10 μmol/L) and BC groups (1, 2 and 4 μmol/L) were set up, and the length of neural
          protrusions  of  the  differentiated  cells  was  measured  and  the  cell  differentiation  rate  was  calculated  after  48  h  and  72  h  of  culture.
          Compared  with  0  min  group, Western  blot  was  used  to  detect  the  phosphorylation  levels  of  protein  kinase  B (Akt),  extracellular-
          signal regulated kinase 1/2 (ERK1/2), and p38 mitogen-activated protein kinase (p38) proteins in cells treated by 4 μmol/L BC for
          5,  15,  30,  60,  120  min. After  intervention  with  inhibitors  LY294002 (LY)  and  PD98059 (PD),  the  effects  of  BC  on Akt  and
          ERK1/2  protein  phosphorylation  levels  and  promoting  neural  differentiation  were  further  validated.  RESULTS  According  to  the
          MTT experiment, the BC concentrations for subsequent induction of cell differentiation were determined to be 1, 2, and 4 μmol/L.
                                                              After  48  hours  of  differentiation,  compared  with  the  control
              Δ  基金项目 湖 南 省 大 学 生 创 新 创 业 训 练 计 划 项 目(No.
                                                              group,  the  cell  differentiation  rate  in  RA  group  and  BC  1,  2
          S202112214017)                                      and  4  μmol/L  groups,  the  length  of  cellular  neural  processes
             *第一作者 硕士研究生。研究方向:神经药理学。E-mail:
          wjxhhxx413@163.com                                  in  the  BC  4  μmol/L  group  significantly  increased (P<0.05  or
              # 通信作者 副教授,博士。研究方向:神经药理学。E-mail:                P<0.01);after  inducing  differentiation  of  BC  for  72  hours,
          hnyyxy_tanggenyun@126.com                           compared  with  the  control  group,  the  cell  differentiation  rate


          · 578 ·    China Pharmacy  2024 Vol. 35  No. 5                               中国药房  2024年第35卷第5期
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