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车叶草苷对非酒精性脂肪性肝病大鼠肝纤维化的影响及机制
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梁 金 ,许 丹 ,杜进军(武汉市中医医院脾胃肝胆病科,武汉 430010)
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中图分类号 R965;R285.5 文献标志码 A 文章编号 1001-0408(2024)17-2102-06
DOI 10.6039/j.issn.1001-0408.2024.17.08
摘 要 目的 探究车叶草苷调节鞘氨醇激酶1(SphK1)/1-磷酸鞘氨醇(S1P)信号通路对非酒精性脂肪性肝病(NAFLD)大鼠肝纤
维化的影响及机制。方法 以高脂饲料饲养的方法建立大鼠 NAFLD 模型,将造模成功的大鼠随机分为模型组、车叶草苷低剂
量组(14 mg/kg,灌胃,下同)、车叶草苷高剂量组(28 mg/kg)、车叶草苷高剂量(28 mg/kg)+pc-NC(空载质粒,50 µg,尾静脉注射,下
同)组、车叶草苷高剂量(28 mg/kg)+pc-SphK1(SphK1过表达质粒,50 µg)组,每组12只。另取12只大鼠以正常饲料饲养作为对
照组。各组大鼠灌胃或尾静脉注射相应药物或质粒,灌胃处理每天1次,尾静脉注射处理每周2次,均连续3周。末次给药后,检
测各组大鼠血脂指标[总胆固醇(TC)、甘油三酯(TG)、游离脂肪酸(FFA)]与肝功能指标[天冬氨酸转氨酶(AST)和丙氨酸转氨酶
(ALT)]水平;观察大鼠肝组织病理变化以及肝纤维化情况;检测大鼠血清纤维化相关因子[Ⅲ型前胶原(PCⅢ)、Ⅳ型胶原
(Ⅳ-Col)、层粘连蛋白(LN)]、促纤维化因子[转化生长因子β1 (TGF-β1 )]与促炎因子[白细胞介素1β(IL-1β)、诱导型一氧化氮合酶
(iNOS)、IL-6]水平;检测大鼠肝组织胶原形成相关蛋白(Ⅰ-Col、Ⅳ-Col)与SphK1/S1P信号通路相关蛋白表达。结果 与对照组比
较,模型组大鼠肝组织呈现明显病理损伤症状;NAFLD 活动度评分、肝组织胶原容积分数(CVF)和血清中 TC、TG、FFA、AST、
ALT、PCⅢ、Ⅳ-Col、LN、TGF-β1、IL-1β、iNOS、IL-6 水平以及肝组织中Ⅰ-Col、Ⅳ-Col、SphK1、S1P 蛋白表达水平均显著升高(P<
0.05)。与模型组比较,车叶草苷低、高剂量组大鼠肝组织病理损伤症状均减轻,上述指标水平均显著降低(P<0.05),且高剂量组
降低效果更好(P<0.05)。与车叶草苷高剂量组和车叶草苷高剂量+pc-NC组比较,车叶草苷高剂量+pc-SphK1组大鼠肝组织病理
损伤症状加重,上述指标水平均显著升高(P<0.05)。结论 车叶草苷可通过抑制SphK1/S1P信号通路活性,降低促纤维化因子、
促炎因子以及胶原形成蛋白表达,从而减轻NAFLD大鼠肝纤维化。
关键词 车叶草苷;非酒精性脂肪性肝病;肝纤维化;SphK1/S1P信号通路
Effect and mechanism of asperuloside on liver fibrosis in non-alcoholic fatty liver rats
LIANG Jin,XU Dan,DU Jinjun(Dept. of Spleen, Stomach and Hepatobiliary Diseases, Wuhan Hospital of
Traditional Chinese Medicine, Wuhan 430010, China)
ABSTRACT OBJECTIVE To investigate the effect and mechanism of asperuloside on liver fibrosis in non-alcoholic fatty liver
disease (NAFLD) rats by regulating the sphingosine kinase 1 (SphK1)/sphingosine-1-phosphate (S1P) signaling pathway.
METHODS SD rats were fed with a high-fat diet to establish a NAFLD model. They were randomly separated into model group,
asperuloside low-dose group (14 mg/kg, i. g., similarly hereinafter), asperuloside high-dose group (28 mg/kg), high dose of
asperuloside (28 mg/kg)+pc-NC (empty plasmid, 50 µg, via tail vein, similarly hereinafter) group, and high dose of asperuloside
(28 mg/kg)+pc-SphK1 (SphK1 overexpression plasmid, 50 µg) group, with 12 rats in each group. Another 12 rats were fed with a
normal diet as control group. Each group was given relevant medicine or plasmid intragastrically once a day or via tail vein twice a
week, for 3 consecutive weeks. After the last medication, the levels of blood lipid indexes [total cholesterol (TC), triglyceride
(TG), and free fatty acid (FFA)] and liver function indexes [aspartate transaminase (AST) and alanine transaminase (ALT)] were
detected in each group. The pathological changes of liver tissue and liver fibrosis in rats were also observed in each group. The
levels of serum fibrosis-related factors [procollagen type Ⅲ (PCⅢ), collagen type Ⅳ (Ⅳ-Col), laminin (LN)], pro-fibrotic factor
[transforming growth factor-β1 (TGF-β1 )], and pro-inflammatory factors [interleukin-1β (IL-1β), inducible nitric oxide synthase
(iNOS), IL-6] of rats were determined in each group. The expressions of collagen formation-related proteins (Ⅰ-Col, Ⅳ-Col) and
SphK1/S1P pathway-related proteins in the liver tissues of rats
Δ 基金项目 武汉市医学科研项目(No.WZ20C02) were detected in each group. RESULTS Compared with
*第一作者 主治医师,硕士。研究方向:中医内科临床。电话:
control group, the liver tissue of rats in model group showed
027-84476811。E-mail:712102382@qq.com
significant pathological damage; the NAFLD activity score,
# 通信作者 副主任医师,硕士。研究方向:脾胃病和胃肠道疾病。
电话:027-84476811。E-mail:49553327@qq.com liver tissue collagen volume fraction, serum levels of TC,
· 2102 · China Pharmacy 2024 Vol. 35 No. 17 中国药房 2024年第35卷第17期