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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