简介:Inthisstudy,weinvestigatedthepreventiveeffectsofaprobioticpreparation(MiyaBM)containingClostridiumbutyricumsporesagainstthesideeffectsofHelicobacterpylorieradication.Theratswereadministeredomeprazole,amoxicillinandclarithromycin,whichcombinationofdrugswasanewtriple-therapyproposedforthefirstlinetherapybytheguidelineofthetreatmentofH.pyloriinfectioninJapan.ObligateanaerobesandLactobacillusweredecreasedmarkedly,whileaerobeswereincreasedafterthethreedrugsadministration.Moreover,Clostridiumdifficilecausativeofantibioticassociateddiarrheawasisolatedfromfecesafterthe7th.AdministrationofMiyaBMdecreasedthenumberofC.difficileinthefecesandincreasedtheshortchainfattyacidsintheintestinalcontents.
简介:Tamiflu(Oseltamivirphosphate)seemstobeadouble-edgedswordtosomeinAsia.Whileitiscountedonagainstinfluenzaandafearedavianinfluenzapandemic[1],thedrugisalsoassociatedwithsideeffects,rangingfromneu-ropsychiatric,gastrointestinal,tohyperthenniaandskinproblems.AccordingtoadocumentfromUSFoodandDrugAdministrationin2005[2],1184casesofsideeffectshavebeenreported.Interestingly69outofthe75pediatriccaseswerefromJapan,includingtwoteensuicides.Thesituationseemedtohavemadeagloomierturnrecently.ItwasreportedinFebruary,2007thattwoJapaneseteenagersjumpedfromapartmentbuildingsaftertakingTamifluanddied,bringingthetotalnumberofdeathsaftertakingTamiftuinJapanto54[3,4].Althoughnodirectcausalrelationshiphadbeenes-tablishedyet,theJapanHealthMinistrywarneddoctorsaboutgivingthedrugtoteenagers.Incomparison,relativelyfewcasesofseveresideeffectswerereportedfromAmericaandEuropeancountries[5].Whatiswrongwiththispicture?Ithasconcernedandbewilderedmany.Thepagesinthisissue[6]offeronefascinatinghypothesisthattriestoexplainthemysteryusinganintegratedapproachcombiningstructuralbioinformaticanalysisandenzymeassays.
简介:AnovelnumericalmodelbasedontheimageGreenfunctionandfirst-orderTaylorexpansionboundaryelementmethod(TEBEM),whichcanimprovetheaccuracyofthehydrodynamicsimulationforthenon-smoothbody,wasdevelopedtocalculatethesidewalleffectsonfirst-ordermotionresponsesandsecond-orderdriftloadsuponoffshorestructuresinthewavetank.Thismodelwasconfirmedbycomparingittotheresultsfromexperimentsonhydrodynamiccoefficients,namelythefirst-ordermotionresponseandsecond-orderdriftloaduponahemisphere,prolatespheroid,andbox-shapedbargeinthewavetank.Then,thehydrodynamicsoftheKVLCC2modelwerealsocalculatedintwowavetankswithdifferentwidths.Itwasconcludedthatthismodelcanpredictthehydrodynamicsforoffshorestructureseffectively,andthesidewallhasasignificantimpactonthefirstorderquantitiesandsecond-orderdriftloads,whichsatisfiedtheresonantrule.
简介:Ephedrinehasaprotectiveeffectagainstcerebralischemia,butitssideeffectslimititsclinicalapplication.Resultsfromapreviousstudyshowedthat1.5mg/kgperdayephedrinecanpromotemotionrecoveryinratsfollowingcerebralischemia/reperfusionwithoutsignificantsideeffects.Inthepresentstudy,ephedrineatdosesof3.0,2.5and2.0mg/kgwasusedtotreatratswithcerebralischemia/reperfusionandtheeffectsofephedrineontheheart,liver,kidneyandcerebrumwereobserved.Resultsshowedthatthebloodpressureofratswithcerebralischemia/reperfusioninjuryfollowingephedrinetreatmentwaslowerthaninratsthatrecoverednaturallyfromcerebralischemia/reperfusion,butthepressuredecreasedwithincreasingdosesofephedrine.Inaddition,serumaspartatetransaminase,alkalinephosphataseandcreatinineconcentrationinratswithcerebralischemia/reperfusioninjuryfollowingephedrinetreatmentweregreaterthaninratsthatrecoverednaturallyfromcerebralischemia/reperfusion.Theconcentrationsoftheseenzymesweredecreasedwithincreasingdosesofephedrine.Ephedrine-treatedratsdisplayedhyperemia,degenerationandedemainthecerebrum,liver,heartandkidney.Resultsdemonstratedthatephedrineexhibitedsideeffectsonthecerebrum,heart,liverandkidneyinratsfollowingcerebralischemia/reperfusioninadose-dependentmanner.
简介:Inthisstudy,etherificationofginkgolideBanddimethylaminoethylchloridehydrochloridewasinvestigatedasamodelreactioninamicro-flowsystem(MFS),providingtheresultingethersinhighyieldwithfewersideeffects.Meanwhile,thisnovelprocessinMFSworkedwellforotherginkgolidesfromGinkgolbilobaandhalides,givingmoderateyields.
简介:有在结构的不同方面链的Polyimides(PI)被pyromelliticmdianhydride(PMDA)的copolycondensation与3,5-diamino-综合(4甲烷酸己基的酉旨)phenyl-benzamide(C6-PDA),(4-butoxybiphenol)-3,5-diaminobenzoate(C4-BBDA)并且3,5-diamino-benzoic酸decyl酉旨(C10-DA)说出PI-PDA,PI-C4,PI-DA分别地。PI-PDA和PI-DA的方面链的长度象PI-C4的一样类似。通过pretilt角度测试,方面链的长度什么时候是类似的,被表明方面链也不磨擦过程的结构能也不在垂直排列性质上有明显的差别,站在约1.6nm。PI表面的表面精力的测量进一步证明了这结果。X光检查光电子分光镜测量的结果显示PI的方面链从聚合物体积阶段外面拉长了并且在表面上积累了。
简介:Theprocessingmethodappliedtothesidesurfaceisdifferentfromthemethodappliedtothelightpasssurfaceinneodymiumphosphateglass(Nd:glass),andthussubsurfacedefectsremainafterprocessing.ThesubsurfacedefectsinthesidesurfaceinfluencethegainuniformityofNd:glass,whichisakeyfactortoevaluatetheperformanceofamplifiers.Thescatteringcharacteristicsofsidesubsurfacedefectsweresimulatedbyfinitedifferencetimedomain(FDTD)Solutionssoftware.Thescatteringpowersoftheglassfabricatedbyacomputernumericalcontrol(CNC)machinewithoutcladdingweretestedatdifferentincidentangles.Thetrendofthecurvewassimilartothesimulatedresult,whilethesmallestpointwasdifferentwiththecomplextruemorphology.Thesimulationshowedthattheequivalentresidualreflectivityofthecladdingglasscanbemorethan0.1%whenthenumberofdefectsinasinglegriddingisgreaterthan50.
简介:BACKGROUND:GenetherapyforParkinson'sdiseaseisbeingexploredasaneffectivestrategytorestoreandprotectthefunctionofneuronalcellsinthesubstantianigra.Regulationofgeneexpressionisnecessaryforgenetherapytoavoidadverseeffectsduetoexcessivesynthesisoftransgeneproducts.OBJECTIVE:Herewedevelopedrecombinantadeno-associatedvirus(AAV)asaviralvector-mediatedgeneregulationsystembasedonCrerecombinasefusedtothemutatedligand-bindingdomainoftheestrogenreceptor(CreERT2)+inducingagenttamoxifen.InducibleCrerecombinasewasusedtoreducetyrosinehydroxylasegeneexpressionandtopreventtheexcessiveincreaseindopamine.DESIGN,TIMEANDSETTING:Ageneticengineeringinvitrocomparativestudyandrandomizedcontrolledanimalexperiment.ThisstudywasconductedattheGeneTherapyCenter,JichiMedicalSchool,JapanfromJune2002toJune2004.METHODS:ToconstructarecombinantAAVvectorcarryingadopaminesynthasegene.ThetyrosinehydroxylasegenewasinsertedusingaloxPfragmentthatcouldberegulatedbyCrerecombinase.TherecombinantAAVvectorcarryingtheCreERT2genewasco-transducedwithHEK293cellsandthecorpusstriatuminaratmodelofParkinson'sdisease,withinducingagenttamoxifentoregulategeneexpression.MAINOUTCOMEMEASURES:ThelevelsofdopamineandaromaticL-aminoaciddecarboxylase(AADC)activityweredetectedinHEK293cellmediumandinthecorpusstriatuminaratmodelofParkinson'sdiseaseusinghigh-performanceliquidchromatography.ImmunofluorescencedoublestainingwasusedtoobservetyrosinehydroxylaseandCreorAADCco-expressioninHEK293cellmedium.ImmunohistochemicalstainingwasemployedtoobservetyrosinehydroxylaseandAADCexpressionandbehavioralchangesweremeasuredinParkinson'srats.RESULTS:TransfectedAAV-CreERT2andAAVexpressingdopaminesynthesisenzymescouldincreasethesynthesisofdopamineinHEK293mediumandParkinson'sratstriatum(P<0.01)andimprovetherotationalbehaviorofParkin
简介:AlkylatingagentsarechemicallyreactivedrugsthatreactwithDNAtoformcovalentbonds,causingsingle-strandordouble-strandDNAbreaksthatleadtointerstrandandintrastrandDNAcross-linking.Theseagentsareusedextensivelyincancerchemotherapy.Theyhaveasteepdose-responsecurveandarethereforeusefulindoseintensificationstrategies(e,g.inbonemarrowtransplantation).Thesubclassesofalkylatingagentsareasfollows.
简介:Mostcytotoxicchemotherapydrugsexerttheireffectbyinhibitingoneormoreoftheprocessesinvolvedincelldivision.Itappearsthatthefateofcellsdamagedbychemotherapyistodieprimarilybyinductionofapoptosis(prograrmnedcelldeath).Chemotherapyisgenerallyusedtotreatcanceratanadvancedorearlystage.
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简介:Epithelialovariancancerisprimarilyadiseaseofolderwomen.Advancedageisriskfactorfordecreasedsurvival.Optimalsurgeryandthesafeandeffectiveadministrationofchemotherapyareessentialforprolongedprogression-freeandoverallsurvival(OS).Inthisarticle,theavailableregimensinboththeprimarytreatmentandrelapsedsettingarereviewed.