简介:目的:研究超临界CO2萃取丁香油的工艺。方法:探讨了萃取釜压力并采用单因素法研究了分离釜Ⅰ压力对萃取效果的影响,确定了超临界CO2萃取丁香油的较优条件。并将丁香油的超临界CO2萃取法与传统的水蒸气蒸馏法进行比较,用GC-MS法对丁香油进行分离鉴定。结果:萃取釜压力范围为25-30MPa,较优的分离釜Ⅰ压力为14MPa左右,分离釜Ⅱ压力为5MPa,温度55℃左右。超临界CO2法收率为15%,水蒸气蒸馏法收率为4%,GC-MS分别鉴定出11种和8种化学物质,主要由丁香酚、乙酸丁香酯和β-石竹烯组成。结论:超临界CO萃取法用于提取丁香油具有时间短、收率高等优点,比传统的水蒸气蒸馏法更优越。
简介:目的:对山楂核的化学成分及生物活性进行研究。方法:运用大孔吸附树脂D101,硅胶,ODS和制备高效液相色谱等方法分离化合物,通过多种波谱方法进行结构鉴定。此外,还对化合物进行了OPM2和RPMI-8226两组细胞株的细胞毒活性测试。结果:从山楂核中得到4个化合物:(7S,8S)-4-[2-hydroxy-2-(4-hydroxy-3-methoxyphenyl)-1-(hydroxymethyl)ethoxy]-3,5-dimethoxybenzaldehyde(1),(+)-balanophonin(2),erythro-guaiacylglycerol-β-coniferylaldehydeether(3),buddlenolA(4)。结论:化合物1为一新降木脂素。化合物24为属内首次分离得到。活性测试结果表明化合物14的抗肿瘤活性不明显。更多还原
简介:目的:研究山茱萸环烯醚萜总苷(ICO)对高糖或糖化终产物(AGEs)培养肾小球系膜细胞(GMC)增殖和Na^+.K^+-ATP酶活性的影响。方法:用含AGEs或高糖的培养液配制ICO、氨基胍,同时设对照。GMC培养48h后MTT法考察GMC的增殖情况,试剂盒测试细胞悬液中细胞蛋白含量,再进行Na^+,K^+-ATP酶测定。结果:于葡萄糖或AGEs中GMC的吸收度值增大,Na^+,K^+-ATP酶活性显著降低,而加入ICO后,则表现为对抗高糖或AGEs对GMC的增殖作用,并能提高Na^+,K^+-ATP酶活性。结论:ICO能抑制高糖或AGEs对GMC的过度增殖,修复高糖或AGEs致GMC的Na^+,K^+-ATP酶活性降低。
简介:Ginkgoditerpenelactonesmeglumineinjection(GDLI)isacommerciallyavailableproductusedforneuroprotection.However,thepharmacokineticpropertiesoftheprototypesandhydrolyzedcarboxylicformsoftheprimarycomponentsinGDLI,i.e.,ginkgolideA(GA),ginkgolideB(GB),andginkgolideK(GK),haveneverbeenfullyevaluatedinbeagledogs.Inthiswork,asimple,sensitive,andreliablemethodbasedonultra-fastliquidchromatography-tandemmassspectrometry(UFLC-MS/MS)wasdeveloped,andtheprototypesandtotalamountsofGA,GB,andGKweredeterminedinbeagledogplasma.Theplasmaconcentrationsofthehydrolyzedcarboxylicformswerecalculatedbysubtractingtheprototypeconcentrationsfromthetotallactoneconcentrations.Forthefirsttime,thepharmacokineticsofGA,GB,andGKwerefullyassessedinthreeforms,i.e.,theprototypes,thehydrolyzedcarboxylicforms,andthetotalamounts,afterintravenousadministrationofGDLIinbeagledogs.Itwasshownthatginkgolidesprimarilyexistedinthehydrolyzedforminplasma,andtheratioofhydrolysatestoprototypeformsofGAandGBdecreasedgraduallytoahomeostaticratio.AllofthethreeformsofthethreeginkgolidesshowedlinearexposureofAUCtothedosages.GA,GB,andGKshowedaconstanthalf-lifeapproximately2.7,3.4,and1.2h,respectively,whichwereconsistentfortheformsatthreedoselevels(0.3,1.0,and3.0mg·kg~(-1))andafteraconsecutiveinjectionofGDLIfor7days(1.0mg·kg~(-1)).
简介:目的:探索炙甘草汤对哇巴因所致心肌细胞触发活动的影响及作用机理。方法:应用微电极技术及单相动作电位技术观察炙甘草汤对哇巴因所致触发性离体及在体心肌触发活动的影响,并运用Na^+,K^+-ATP酶活性测定试剂盒测定心肌细胞的Na^+,K^+-ATP酶活性。结果:(1)哇巴因(0.5×10^-6mmol·mL^-1)高钙台氏液灌流可引起豚鼠离体左心室乳头肌触发活动,炙甘草汤(3、6、12mg·ml^-1)明显降低触发活动的幅度、时程和发生率,高浓度时完全抑制触发活动的发生.(2)哇巴因(4×100mmol·kg^-1,iv)可引起豚鼠在体心肌触发活动.炙甘草汤(10、20、30g生药/kg,ig)明显延迟触发活动的发生,降低触发活动的幅度和发生率,并提高触发性心肌细胞Na^+,K^+-ATP酶活性.结论:炙甘草汤抑制哇巴因所致触发活动的发生可能是通过提高Na^+,K^+-ATP酶活性而实现的。
简介:Houttuyniacordatapolysaccharide(HCP)isextractedfromHouttuyniacordata,akeytraditionalChinesemedicine.ThestudywastoinvestigatetheeffectsofHCPonintestinalbarrierandmicrobiotainH1N1virusinfectedmice.MicewereinfectedwithH1N1virusandorallyadministratedHCPatadosageof40mg(kg^-1(d^-1.H1N1infectioncausedpulmonaryandintestinalinjuryandgutmicrobiotaimbalance.HCPsignificantlysuppressedtheexpressionofhypoxiainduciblefactor-1αanddecreasedmucosubstancesingobletcells,butrestoredthelevelofzonulaoccludens-1inintestine.HCPalsoreversedthecompositionchangeofintestinalmicrobiotacausedbyH1N1infection,withsignificantlyreducedrelativeabundancesofVibrioandBacillus,thepathogenicbacterialgenera.Furthermore,HCPrebalancedthegutmicrobiotaandrestoredtheintestinalhomeostasistosomedegree.TheinhibitionofinflammationwasassociatedwiththereducedlevelofToll-likereceptorsandinterleukin-1βinintestine,aswellastheincreasedproductionofinterleukin-10.OraladministrationofHCPalleviatedlunginjuryandintestinaldysfunctioncausedbyH1N1infection.HCPmaygainsystemictreatmentbylocalactingonintestineandmicrobiota.Thisstudyprovedthehigh-valueapplicationofHCP.