Effects of Ethanol Extract of Laggera alata(D.Don)Sch.Bip.ex Oliv on Cirrhotic Rats with Ascites

[Objectives]This study aimed to investigate the intervention effects of ethanol extract of Laggera alata(D.Don)Sch.Bip.ex Oliv on cirrhotic rats with ascites.[Methods]A total of 100 male SD rats of SPF grade were used.Rat models of cirrhosis and ascites were established.After the last administration,the amount of peritoneal fluid was measured,and the blood of each rat tested was collected for determination of serum AST,ALT and ALB levels,serum K+concentration and plasma Ald level.[Results]In ascitic cirrhotic rats,the livers showed obvious enlargement,the surface of the livers was uneven,and nodules were visible.Compared with the blank group,the amount of peritoneal fluid in the model group increased significantly(P<0.01);and compared with the model group,the amounts of peritoneal fluid in the high and medium-dose ethanol extract groups reduced significantly(P<0.01).Compared with the blank group,the serum ALT and AST levels in the model group increased significantly(P<0.01);and compared with the model group,the serum ALT and AST levels in the high-dose ethanol extract group decreased significantly(P<0.05).Compared with the blank group,the serum K+concentration in the positive group reduced(P<0.05);no significant difference was found in serum K+concentration between the ethanol extract administration groups and the blank group(P>0.05).Compared with the blank group,the plasma Ald levels in the high-dose ethanol extract group and the positive group reduced(P<0.05);and there was no significant difference in serum K+concentration between the rest groups and the blank group(P>0.05).[Conclusions]In the ethanol extract administration groups,the amounts of peritoneal fluid significantly reduced,the serum ALT and AST reduced,and the liver functions improved to a certain extent,indicating that the ethanol extract of L.alata(D.Don)Sch.Bip.ex Oliv has a better correction effect on electrolyte disturbances in cirrhotic rats with ascites.

Extraction Process and Content Determination of Caffeic Acid in Laggera alata from Different Production Areas of Guangxi

[Objectives] To establish a method for determining the content of Laggera alata( D. Don) Sch. Bip. Ex Oliv. using caffeic acid the target component,and to compare the content of caffeic acid in the medicinal materials of L. alata in different production areas of Guangxi.[Methods]The content was determined by Inertsil~ODS-3 chromatographic column C_(18)( 4. 60 mm × 250 mm,5 μm,mobile phase: acetonitrile-0. 1% phosphoric acid( 22∶ 78),detection wavelength: 320 nm,flow rate: 1. 0 m L/min,column temperature: 30℃,and injection volume: 10 μL. [Results] The caffeic acid showed a good linear relationship in the range of injection volume of 0. 025 92-0. 259 2 μg( R =0. 999 5). The average recovery rate was 98. 33%( RSD = 1. 85%). L. alata in different production areas of Guangxi contained the caffeic acid,and there was a great difference in the caffeic acid. L. alata in Baise had the highest content of caffeic acid,while that in Guilin had the lowest content of caffeic acid. [Conclusions]This method can accurately determine the content of caffeic acid and is expected provide a scientific basis for the development and utilization of herbal medicine L. alata.

六棱菊提取物通过上调Nrf2信号通路对代谢相关脂肪性肝病模型小鼠的干预作用

目的通过网络药理学以及动物实验探讨六棱菊对代谢相关脂肪性肝病(MAFLD)模型小鼠的干预作用及潜在的分子机制。方法通过文献检索得到六棱菊的活性成分,通过SwissTargetPredicton和疾病数据库(GeneCards)和Pharm Mapper数据库预测六棱菊成分相关靶标,Genecards数据库获取MAFLD和氧化应激相关靶标,通过STRING和Cytoscape3.9.1软件建立蛋白质-蛋白质相互作用(PPI)网络模型并找到关键靶点。对六棱菊治疗MAFLD的靶标进行GO富集分析与KEGG通路富集分析。将50只C57BL/6J雄性无菌小鼠适应性饲养1周后随机分为5组,分别为对照组、模型组及六棱菊提取物低、中、高剂量(1.25、2.50、5.00 g·kg^(-1))组;小鼠给予高脂饲料8周进行MAFLD造模,造模后给药6周。实验第14周末处死小鼠,比较各组小鼠肝脏指数、肝组织病理变化,测定各组小鼠血清中炎症因子的水平及肝脏中脂肪含量,测定血清转氨酶、肝脏脂肪水平以及肝组织的氧化损伤指标丙二醛(MDA)、还原型谷胱甘肽(GSH)、超氧化物歧化酶(SOD)水平,检测核因子E2相关因子2(Nrf2)信号通路重要基因和蛋白Nrf2、NAD(P)H喹啉氧化酶1(Nqo1)、糖原合成酶激酶-3β(GSK-3β)和非受体酪氨酸蛋白激酶(Fyn)的表达水平。结果网络药理学获得六棱菊、MAFLD、氧化应激的交集靶点共304个,六棱菊可能通过TNF、AKT1、ALB、EGFR、STAT3、NFE2L2等核心靶点作用于HIF-1、糖尿病并发症中的AGE-RAGE、甲状腺激素、FoxO、PI3K-Akt、TNF信号通路等发挥MAFLD治疗作用。动物实验结果显示,与对照组比较,模型组小鼠的整体状态差,肝脏组织大面积脂肪变性及脂质浸润,血清转氨酶、肝脏脂肪水平明显升高,证实了高脂饲料饮食喂养8周成功构建了小鼠MAFLD模型;各药物干预治疗组小鼠肝脏指数、肝脏病理变化和肝脏脂肪水平,血清转氨酶、脂质过氧化水平和Nrf2信号通路重要基因和蛋白表达均较模型组显著改变(P<0.05),其中,六棱菊提取物高剂量组改变最为明显。结论不同剂量六棱菊提取物干预均能明显改善MAFLD小鼠血清中炎症因子水平,肝脏脂质沉积、肝功能指标,降低肝脏指数,可能与调控Nrf2信号通路的表达,降低肝组织中脂质过氧化水平和炎症反应的表达有关。

民族药六棱菊抗炎作用及其机制研究

目的:研究六棱菊提取物的抗炎作用及其机制,为该药用植物开发应用提供实验依据。方法:建立二甲苯致小鼠耳肿胀、醋酸致小鼠腹腔毛细血管通透性增加、角叉菜胶致小鼠足肿胀等炎症模型,评价六棱菊提取物对急、慢性炎症的药理活性。建立二甲苯致摘除双侧肾上腺小鼠耳肿胀、角叉菜胶致摘除双侧肾上腺小鼠足肿胀模型,判断其抗炎作用是否依赖下丘脑-垂体-肾上腺轴(HPAA)系统,测定足炎性组织丙二醛(MDA)、一氧化氮(NO)和超氧化物歧化酶(SOD)水平。结果:与模型组比较,除低剂量组无统计学意义(P>0.05)外,六棱菊提取物高、中剂量组对二甲苯致小鼠耳肿胀均有显著的抑制作用;六棱菊提取物抑制醋酸致小鼠腹腔毛细血管通透性的升高,对角叉菜胶致小鼠足肿胀亦有显著抑制作用;与模型组比较,在摘除双侧肾上腺小鼠模型中,六棱菊提取物高、中剂量组能显著抑制二甲苯致该模型小鼠耳肿胀;以及能显著抑制角叉菜胶致该模型小鼠足肿胀;六棱菊提取物高、中剂量组均能显著降低足组织中MDA和NO水平,均能显著提高足组织中SOD水平。结论:六棱菊提取物均具有抗炎活性,其抗炎作用的发挥不依赖HPAA系统,同时六棱菊提取物的抗炎作用机制与降低MDA和NO水平,提高SOD水平有关。