摘要
探讨补骨脂素和异补骨脂素对正常人肝细胞(LO2)内脂质沉积的改善及作用机制。建立棕榈酸(PA)诱导的人LO2细胞非酒精性脂肪肝模型,给予补骨脂素和异补骨脂素干预,酶法检测细胞内甘油三酯(TG)、总胆固醇(TC)含量,细胞上清液谷丙转氨酶(ALT)、谷草转氨酶(AST)含量;ELISA法检测细胞上清液促炎因子(IL-6,TNF-α)及趋化因子(IL-8,MCP-1)的表达;Western blot法检测细胞内核因子κB(NF-κB) p65磷酸化(p-p65)及非磷酸化蛋白(p65)、转化因子(TGF)β1蛋白表达。结果显示,与模型组比较,补骨脂素组细胞内TG,TC含量降低(P<0. 01,P<0. 05),细胞上清液中ALT和AST含量、促炎因子及趋化因子分泌水平均有降低(P<0. 01,P<0. 05),细胞内p-p65/p65比值及TGF-β1蛋白表达明显下降(P<0. 01);异补骨脂素组细胞内TG含量无明显变化,其余检测指标均有降低(P<0. 01,P<0. 05)。补骨脂素疗效优于异补骨脂素(P<0. 01,P<0. 05)。结果表明,补骨脂素对PA诱导LO2细胞脂肪变性具有改善作用;补骨脂素和异补骨脂素均对PA诱导LO2细胞损伤具有缓解作用,可抑制NF-κB的活性减轻炎症反应并下调TGF-β1表达。
The aim of this paper was to investigate the mechanism and effect of psoralen and isopsoralen in the treatment of lipid accumulation in LO2 cells. Human LO2 cells nonalcoholic fatty liver models were established by using palmitic acid( PA). Then psoralen and isopsoralen were administered for intervention. Intracellular triglyceride( TG) and total cholesterol( TC) content,the cell supernatant alanine aminotransferase( ALT) and aspartate aminotransferase( AST) levels were determined by enzyme method. Cell supernatant proinflammatory cytokines( IL-6,TNF-α) and chemokines( IL-8,MCP-1) were determined by ELISA method. Western blot method was conducted to detect the protein expression of intracellular nuclear factor( NF-κB) p65 phosphorylation( p-p65),nonphosphorylated protein( p65),and transforming factor TGF-β1. Result showed that as compared with the model group,intracellular TG and TC levels,the cell supernatant ALT and AST levels,proinflammatory cytokines and chemokines were decreased( P < 0. 01,P <0. 05);the p-p65/p65 ratio and TGF-β1 protein expression were also significantly decreased( P< 0. 01,P< 0. 05) in psoralen intervention group. As compared with the model cells,intracellular TG content had no significant changes,but all the other indexes were reduced( P<0. 01,P<0. 05) in the cells of isopsoralen intervention group. Psoralen exhibited better effect than isopsoralen( P< 0. 01,P<0. 05). It is concluded that psoralen could improve the adipogenesis of LO2 cells induced by PA;both psoralen and isopsoralen are effective in ameliorating LO2 cells injury induced by PA,reducing inflammation via inhibiting the activation of NF-κB and down-regulating the expression of TGF-β1.
作者
周俪姗
鄢素琪
熊小丽
黄娟
秦欢
张领领
张林利
汤建桥
ZHOU Li-shan;YAN Su-qi;XIONG Xiao-li;HUANG Juan;QIN Huan;ZHANG Ling-ling;ZHANG Lin-li;TANG Jian-qiao(Wuhan Children's Hospital ( Wuhan Maternal and Child Healthcare Hospital) , Tongji Medical College,Huazhong University of Science & Technology, Wuhan 430016, China;Integrated Traditional Chinese and Western Medicine Hospital of Wuhan , Wuhan 430022, China;Hubei University of Chinese Medicine, Wuhan 430065, China)
出处
《中国中药杂志》
CAS
CSCD
北大核心
2019年第10期2118-2123,共6页
China Journal of Chinese Materia Medica
基金
国家自然科学基金项目(81403251)
武汉中青年医学骨干人才培养工程第五批项目(武卫生计生[2017]51号)
