简介:AIMToinvestigatetheroleofthecomplement5a(C5a)/C5areceptor(C5aR)pathwayinthepathogenesisofacuteliverfailure(ALF)inamousemodel.METHODSBALB/cmicewererandomlyassignedtodifferentgroups,andintraperitonealinjectionsoflipopolysaccharide(LPS)/D-galactosamine(D-GalN)(600mg/kgand10μg/kg)wereusedtoinduceALF.TheKaplanMeiermethodwasusedforsurvivalanalysis.Serumalanineaminotransferase(ALT)levels,atdifferenttimepointswithina1-wkperiod,weredetectedwithabiochemistryanalyzer.Pathologicalexaminationoflivertissuewasperformed36hafterALFinduction.Serumcomplement5(C5),C5a,tumornecrosisfactor-α(TNF-α),interleukin(IL)-1β,IL-6,high-mobilitygroupproteinB1(HMGB1)andsphingosine-1-phosphatelevelsweredetectedbyenzyme-linkedimmunosorbantassay.Hepaticmorphologicalchangesat36hafterALFinductionwereassessedbyhematoxylinandeosinstaining.ExpressionofC5aR,sphingosinekinase1(SphK1),p38-MAPKandp-p38-MAPKinlivertissue,peripheralbloodmononuclearcells(PBMCs)andperitonealexudativemacrophages(PEMs)ofmiceorRAW264.7cellswasanalyzedbywesternblotting.C5aRmRNAlevelsweredetectedbyquantitativereal-timePCR.RESULTSActivationofC5andup-regulationofC5aRwereobservedinlivertissueandPBMCsofmicewithALF.BlockadeofC5aRwithaC5aRantagonist(C5aRaC5aRa)significantlyreducedthelevelsofserumALT,inflammatorycytokines(TNF-α,IL-1βandIL-6)andHMGB1,aswellasthelivertissuedamage,butincreasedthesurvivalrates(P<0.01forall).BlockadeofC5aRdecreasedSphK1expressioninbothlivertissueandPBMCssignificantlyat0.5hafterALFinduction.C5aRapretreatmentsignificantlydownregulatedthephosphorylationofp38-MAPKinlivertissuesofALFmiceandC5astimulatedPEMsorRAW264.7cells.Moreover,inhibitionofp38-MAPKactivitywithSB203580reducedSphK1proteinproductionsignificantlyinPEMsafterC5astimulation.CONCLUSIONTheC5a/C5aRpath
简介:BackgroundApolipoprotein(apo)A-Visanovelmemberoftheapolipoproteinclusterinvolvedintriacylglycerol(TG)homeostasis.IthasreportedthatAPOA5genepolymorphismsiscorrelatedwitharterioscleroticdiseases.However,ThisassociationisunknownonChinesepatientswithatheroscleroticcerebralinfarction.ThepresentstudyaimedtoelucidatetherelationshipofAPOA5-1131T>Candarterioscleroticcerebralinfarction(ACI)aswellasthelevelsofserumlipids.MethodsPolymerasechainreaction-restrictionfragmentslengthpolymorphisms(PCR-RFLP)analysis,enzymaticandimmunoturbidimetrymethodswereusedtomeasure-1131T>Cgenotype,allelefrequencyaswellasplasmalipidlevelof90ACIpatientsand221healthysubjectsofHanChinese.ResultsInACIgroup,thelevelofTGinalleleCcarrierswashigherthanthatofnon-Ccarriers(P<0.05).ThefrequencyofalleleCinACIgroupwashigherthaninhealthygroup(χ~2=5.568,P=0.018).Exceptsex,ageandBMI,thelevelsoftotalcholesterol(TC),triglycerides(TG),highdensitylipoproteincholesterol(HDL-C),low-densitylipoproteincholesterol(LDL-C),APOA1andAPOBinACIgroupdistinctivelywerehigherthanthoseinhealthygroup.ConclusionTheAPOA5-1131alleleCisassociatedwiththehighlevelofTGinACIpatients,whichisprobablylinkedwithACIdangerofChineseHan.
简介:摘要目的颈动脉内中膜厚度(CIMT)、TC/HDL-C、LDL-C/HDL-C评估糖尿病患者早期动脉粥样硬化的研究。方法选取2014年1月至2015年12月期间在我院就诊的患者共110例,其中糖尿病组53例及正常对照组57例。分别观察两组间CIMT、TC/HDL-C、LDL-C/HDL-C间差异,及CIMT与TC/HDL-C、LDL-C/HDL-C相关性。结果本实验入选人群中,糖尿病患者总胆固醇、甘油三酯、高密度脂蛋白、低密度脂蛋白、血脂比率TC/HDL-C、LDL/HDL及颈动脉内中膜厚度均明显高于正常受检者,两组间具有差异差异具有统计学意义(p<0.001)。颈动脉内中膜厚度与糖尿病早期动脉粥样硬化评估指标LDL-C/HDL-C、TC/HDL-C间均有正相关关系,且相关性具有统计学意义(p<0.05)
简介:摘要本文对C反应蛋白在儿科的临床应用情况进行了介绍,C反应蛋白是在机体在应激状态下肝脏合成时产生的,而且不同原因引起的感染、炎症以及损伤都会影响其浓度。我国的医疗水平在不断提高,医学检测技术越来越先进,相关医学工作者将C反应蛋白应用在儿科诊疗中,收到了良好的效果,在对组织损伤以及坏死的判断以及病情评估中,提供了有效的依据,保证了医疗检测的质量,也改善了患者的病情。
简介:背景:BALB/c和C57BL/6小鼠是实验室常用的两种近交品系,但是自主运动后如何科学、合理选择行为学实验方法和指标,评价小鼠的学习记忆能力目前尚无相关报道。目的:分析比较自主运动后BALB/c和C57BL/6小鼠与学习记忆相关的行为学指标差异,为探讨运动对学习记忆能力的影响,并选择合理的行为学指标提供参考。方法:将2.5月龄BALB/c和C57BL/6小鼠分别随机分为对照组和跑轮运动组,应用VitalView软件记录小鼠自主跑轮运动。跑轮运动4周后,通过DCX免疫荧光染色检测海马新生神经元;新异臂探索实验、新物体识别实验和水迷宫实验分析比较小鼠空间学习记忆和探索能力。结果与结论:①BALB/c小鼠平均每天运动量约是C57BL/6小鼠的2.56倍(P〈0.001)。②跑轮运动后两种品系小鼠海马DCX阳性细胞数较对照组增多。③跑轮运动后两种品系小鼠探索新异臂和新物体的次数、围绕新异臂和新物体探索的时间和距离均较对照组增高(P〈0.001),其中BALB/c跑轮组的探索能力优于C57BL/6跑轮组(P〈0.05)。④Morris水迷宫实验结果表明,C57BL/6跑轮组寻找平台的时间缩短,小鼠到达平台次数、在目标象限探寻的时间和距离均较对照组延长(P〈0.05);但是,BALB/c跑轮组和对照组间水迷宫实验各项指标无统计学差异。综上所述,运动能促进BALB/c和C57BL/6小鼠海马神经发生;新异臂探索和新物体识别实验能够用于检测运动后两种小鼠的学习记忆能力,其中BALB/c的学习记忆能力优于C57BL/6小鼠,但运动后BALB/c小鼠不适合应用水迷宫实验检测其空间学习记忆能力的变化。