Page 36 - 中国药房2023年10期
P. 36
小白薇不同萃取物对非酒精性脂肪性肝炎的改善作用及机制
Δ
乔 雪 ,李欣坪,薛咏梅,方琼莲,王蒙蒙,林玉萍(云南中医药大学中药学院/云南省南药可持续利用重点实验
#
*
室,昆明 650500)
中图分类号 R965 文献标志码 A 文章编号 1001-0408(2023)10-1182-05
DOI 10.6039/j.issn.1001-0408.2023.10.06
摘 要 目的 探讨小白薇不同萃取物对非酒精性脂肪性肝炎(NASH)的改善作用和作用机制。方法 用游离脂肪酸诱导人正常
肝细胞LO2脂肪变性,实验分为正常组、模型组、水飞蓟宾组(100 μmol/mL)、小白薇乙醇萃取物(TYS)组(50 μg/mL)、小白薇乙
酸乙酯萃取物(TYSA)组(50 μg/mL)、小白薇正丁醇萃取物(TYSB)组(50 μg/mL),药物干预24 h后观察各组LO2细胞内的脂滴
沉积情况,检测细胞内总胆固醇(TC)、三酰甘油(TG)、丙二醛(MDA)、谷胱甘肽(GSH)含量和天冬氨酸转氨酶(AST)、丙氨酸转
氨酶(ALT)、超氧化物歧化酶(SOD)活性以及Kelch样环氧氯丙烷相关蛋白1(Keap1)、核因子E2相关因子2(Nrf2)、血红素氧合酶1
(HO-1)mRNA表达水平。用高脂饮食诱导建立NASH大鼠模型,实验分为正常组、模型组、水飞蓟宾组(12.6 mg/kg)、TYS组(80
mg/kg)、TYSA组(80 mg/kg)、TYSB组(80 mg/kg),每组6只。药物干预6周后计算各组大鼠的肝脏指数,观察肝脏病理形态变化,
检测血清中 TC、TG、HDL-C、LDL-C 含量和 AST、ALT 活性以及肝组织中 MDA、GSH 含量和 SOD 活性。结果 与模型组比较,
TYS、TYSA、TYSB 可降低 LO2 细胞脂肪变性后的脂滴沉积和细胞内 TC、TG、MDA 含量以及 AST、ALT 活性,升高 SOD 活性、
GSH含量和Keap1、Nrf2、HO-1 mRNA表达水平,部分差异有统计学意义(P<0.05);还可显著改善NASH模型大鼠的肝损伤,降
低其肝脏指数和TC、TG、LDL-C、MDA含量以及AST、ALT活性,升高HDL-C(TYS、TYSB除外)、GSH含量和SOD活性,以TYSA
效果最明显(P<0.05)。结论 TYS、TYSA、TYSB对NASH具有一定的改善作用,其中TYSA效果最明显;其作用机制可能与上调
Keap1/Nrf2/HO-1信号通路,抑制氧化应激有关。
关键词 小白薇;非酒精性脂肪性肝炎;游离脂肪酸;正常肝细胞LO2;肝功能;抗氧化活性;大鼠
Improvement effect and mechanism of different extracts from Tylophora yunnanensis on non-alcoholic
steatohepatitis
QIAO Xue,LI Xinping,XUE Yongmei,FANG Qionglian,WANG Mengmeng,LIN Yuping(School of Chinese
Materia Medica/Yunnan Key Laboratory of Southern Medicinal Resource, Yunnan University of Chinese
Medicine, Kunming 650500, China)
ABSTRACT OBJECTIVE To investigate the improvement effect and mechanism of different extracts from Tylophora
yunnanensis on non-alcoholic steatohepatitis (NASH). METHODS Normal human liver LO2 cells were induced to steatosis by free
fatty acid, then were divided into normal group, model group, silybin group (100 μmol/mL), T. yunnanensis ethanol extracts
(TYS) group (50 μg/mL), T. yunnanensis ethyl acetate extracts (TYSA) group (50 μg/mL), and T. yunnanensis n-butanol
extracts (TYSB) group (50 μg/mL). After 24 hours of drug intervention, the deposition of lipid droplets was observed in LO2
cells in each group. The contents of total cholesterol (TC), triacylglycerol (TG), malondialdehyde (MDA) and glutathione
(GSH), the activities of aspartate transaminase (AST), alanine transaminase (ALT) and superoxide dismutase (SOD), the mRNA
expressions of Kelch-like ECH-associated protein 1 (Keap1), nuclear factor E2-related factor 2 (Nrf2) and heme oxygenase 1 (HO-
1) were detected. NASH rat model was induced by a high-fat diet, and then divided into normal group, model group, silybin
group (12.6 mg/kg), TYS group (80 mg/kg), TYSA group (80 mg/kg) and TYSB group (80 mg/kg), with six rats in each group.
The liver indexes of rats in each group were calculated after 6 weeks of drug intervention. The liver histopathological changes were
observed, and the contents of TC, TG, HDL-C and LDL-C, AST and ALT activities in serum, the contents of MDA and GSH,
SOD activities in liver tissue were detected. RESULTS Compared with model group, TYS, TYSA and TYSB could reduce lipid
droplet deposition, intracellular TC, TG and MDA contents, AST and ALT activities, and increase SOD activity, GSH content,
and Keap1, Nrf2, HO-1 mRNA expression levels in LO2 cells after steatosis to varying degrees, with some differences being
statistically significant (P<0.05). They also significantly
Δ 基金项目 国家自然科学基金资助项目(No.82160781);云南省
improved liver injury in NASH model rats, reduced their liver
应用基础研究项目-中医联合专项面上项目(No.202001AZ07000
indexes, TC, TG, LDL-C and MDA contents, AST and ALT
1-042)
activities, and increased HDL-C (except for TYS and TYSB),
*第一作者 硕士研究生。研究方向:中药质量控制。E-mail:
1208734974@qq.com GSH contents and SOD activity, with TYSA having the most
# 通信作者 教授,硕士生导师,硕士。研究方向:中药或天然药物 significant effect (P<0.05). CONCLUSIONS TYS, TYSA
活性成分。E-mail:11217005@qq.com and TYSB have a certain improvement effect on NASH,
· 1182 · China Pharmacy 2023 Vol. 34 No. 10 中国药房 2023年第34卷第10期