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雷公藤红素及其衍生物的体外神经保护作用与机制研究
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陈佩佩 ,袁晓煊 ,张 鑫 ,徐 伟 ,许少华 (1.福建中医药大学药学院,福州 350122;2.中国中医科学院
道地药材国家重点实验室,北京 100700)
中图分类号 R965;R285 文献标志码 A 文章编号 1001-0408(2024)05-0536-06
DOI 10.6039/j.issn.1001-0408.2024.05.05
摘 要 目的 从神经炎症和氧化损伤 2 个方面探究雷公藤红素(Cel)及其衍生物 Cel-1、Cel-2 的神经保护作用及可能机制。
方法 利用1 μg/mL脂多糖(LPS)诱导建立小胶质BV2细胞神经炎症模型、200 μmol/L过氧化氢(H2O2 )诱导建立人神经母细胞瘤
SH-SY5Y细胞氧化损伤模型,考察不同浓度(0.625~20 μmol/L)Cel、Cel-1、Cel-2对2种细胞的毒性;并在安全浓度(0.039~0.625
μmol/L)范围内检测LPS诱导BV2细胞培养液中一氧化氮(NO)、肿瘤坏死因子α(TNF-α)、白细胞介素1β(IL-1β)、IL-6含量,检
测H2O2诱导SH-SY5Y细胞的存活率。检测0.156、0.313、0.625 μmol/L活性化合物Cel-2作用后H2O2诱导SH-SY5Y细胞中磷脂酰
肌醇3激酶(PI3K)、磷酸化PI3K(p-PI3K)、蛋白激酶B(Akt)、磷酸化Akt(p-Akt)、胱天蛋白酶3(caspase-3)、B淋巴细胞瘤2(Bcl-2)
和Bcl-2相关X蛋白(Bax)表达水平。结果 在0.039~0.625 μmol/L浓度梯度区间,神经炎症模型实验显示,Cel、Cel-1、Cel-2均可
降低BV2细胞培养液中NO、TNF-α、IL-1β、IL-6的含量(P<0.05或P<0.01),其对神经炎症的半数抑制浓度分别为(0.25±0.04)、
(0.61±0.14)、(0.11±0.02) μmol/L;氧化损伤模型实验显示,Cel、Cel-1、Cel-2 在一定浓度下可逆转 H2O2处理后 SH-SY5Y 细胞存
活率降低的现象(P<0.05或P<0.01),其神经保护的半数效应浓度分别为(0.43±0.08)、(0.45±0.04)、(0.28±0.03) μmol/L。经H2O2
诱导,Cel-2干预后SH-SY5Y 细胞中 PI3K、Akt 蛋白的磷酸化水平和 Bcl-2 蛋白表达水平、Bcl-2/Bax 比值均显著升高(P<0.05 或
P<0.01),caspase-3、Bax蛋白表达水平均显著降低(P<0.05或P<0.01)。结论 Cel、Cel-1、Cel-2在一定浓度下均具有显著的神经
保护活性,且以Cel-2的活性最强;Cel-2的作用机制可能与调控PI3K/Akt、caspase-3/Bcl-2/Bax信号通路,减轻炎症反应、氧化应激
损伤,抑制神经细胞凋亡有关。
关键词 雷公藤红素;衍生物;神经保护作用;神经炎症;氧化应激
Neuroprotective effect and mechanism of celastrol and its derivatives in vitro
CHEN Peipei ,YUAN Xiaoxuan ,ZHANG Xin ,XU Wei ,XU Shaohua (1. College of Pharmacy, Fujian
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University of Traditional Chinese Medicine, Fuzhou 350122, China;2. State Key Laboratory of Dao-di Herbs,
China Academy of Chinese Medical Sciences, Beijing 100700, China)
ABSTRACT OBJECTIVE To explore the neuroprotective effect and possible mechanism of celastrol (Cel) and its derivatives
(Cel-1, Cel-2) in terms of neuroinflammation and oxidative damage. METHODS Neuroinflammation model of microglial BV2
cells was induced by 1 μg/mL lipopolysaccharide (LPS); oxidative damage model of human neuroblastoma SH-SY5Y cells was
induced by 200 μmol/L hydrogen peroxide (H2O2 ). The toxicity of different concentrations of Cel, Cel-1 and Cel-2 (0.625-20
μmol/L) to the two types of cells was investigated. The levels of nitric oxide (NO), tumor necrosis factor α (TNF-α), interleukin
1β (IL-1β), and IL-6 in BV2 cells induced by LPS at safe concentrations (0.039-0.625 μmol/L) were all detected. The survival
rate of SH-SY5Y cells induced by H2O2 was also determined. The expression levels of phosphoinositide 3-kinase (PI3K), p-PI3K,
protein kinase B (Akt), p-Akt, cystatinase 3 (caspase-3), B-cell lymphoma 2 (Bcl-2) and Bcl-2-related X protein (Bax) in SH-
SY5Y cells induced by H2O2 at 0.156, 0.313, 0.625 μmol/L of active compound 2 were all detected. RESULTS In the
concentration gradient range between 0.039 and 0.625 μmol/L, the results of neuroinflammation model experiments showed that
Cel, Cel-1 and Cel-2 could reduce the contents of NO, TNF-α, IL-1β, and IL-6 in culture medium of BV2 cells (P<0.05 or P<
0.01); their IC50 values for neuroinflammation were (0.25±0.04), (0.61±0.14) and (0.11±0.02) μmol/L respectively.
Meanwhile, all of them could reverse the phenomenon of
Δ 基金项目 国家自然科学基金项目(No.82104321);中央本级 decreased cell survival rate after H2O2 treatment in the
重 大 增 减 支 项 目(No. 2060302);福 建 省 自 然 科 学 基 金 项 目(No. oxidative damage experiments at a certain concentration (P<
2020J05062);福建中医药大学基础类学科科研提升计划项目(No. 0.05 or P<0.01), with neuroprotective EC50 values of (0.43±
XJC2023009) 0.08), (0.45±0.04) and (0.28±0.03) μmol/L, respectively.
*第一作者 硕士研究生。研究方向:中药资源及品质评价。
Induced by H2O2, the phosphorylation of PI3K and Akt
E-mail:2459751484@qq.com
# 通信作者 副教授,硕士生导师。研究方向:中药化学成分与活 protein, protein expressions of Bcl-2 and Bcl-2/Bax ratio were
性。E-mail:xushaohua@fjtcm.edu.cn all increased significantly (P<0.05 or P<0.01), while the
· 536 · China Pharmacy 2024 Vol. 35 No. 5 中国药房 2024年第35卷第5期