简介：ObjectivesToinvestigatetheexpressionofhistamineH1receptors(H1R)inthevestibularnucleusofbrainsteminratsandtheroleofH1Rinmotionsickness(MS).MethodsAtotalof24healthySprague-Dawleyratsweredividedrandomlyintofourgroups(n=6each)whichdeterminediftheanimalswouldreceiveinductionofMSordrug(promethazine)treatment:MS(-)/Drug(-);MS(+)/Drug(-);MS(-)/Drug(+at0.25mg);andMS(+)/Drug(+).MSwasinducedbycomplexmotionstimulationandtheconditionedtasteaversionwasusedasabehavioralindicatorofMS.Thevolumeof0.15%sodiumsaccharinsolution(SS)intakewithin45minutesaftermotionstimulationwasmeasured.H1Rinthevestibularnucleuswasexaminedbyimmunofluorescencestaining.TheexpressionofH1Rproteininbrainstemtissueatvestibularnucleuslevelwasdetectedbywesternblot.ResultsThemeanSSintakevolumeintheMS(+)/Drug(-)group(8.8ml)wassignificantlylessthanthatoftheMS(-)/Drug(-)group(15.1ml)(P<0.01).ThemeanSSintakevolumeoftheMS(-)/Drug(+)group(14.8ml)wassimilartothatoftheMS(-)/Drug(-)group.ThemeanSSintakevolume(9.6ml)oftheMS(+)/Drug(+)groupwasmorethanthatoftheMS(+)/Drug(-)group(P<0.01),butlessthanthatoftheMS(-)/Drug(-)grouporMS(-)/Drug(+)group(P<0.01).ImmunofluorescencestainingshowedpositiveexpressionofH1Rinthevestibularnucleusofbrainstemandtheexpressionwasenhancedbymotionstimulation.WesternblotanalysisshowedthatH1Rproteinexpressedinthebrainstemtissueatvestibularnucleuslevelandtheexpressionalsoincreasedsignificantlyaftermotionstimulation.TheMS-inducedincreaseofH1Rwasnotaffectedsignificantlybypromethazine.ConclusionsH1RsexistinthevestibularnucleusinratsandH1Rexpressionisup-regulatedbymotionstimulation,butnotaffectedbypromethazine.ThefindingsindicatethatthehistaminergicsystemisinvolvedinMS.Promethazine,asanH1Rblocker,mayplayitsanti-MSrolebycompetingthebindingsiteon

简介：WHO参与制定的"变应性鼻炎及其对哮喘的影响"(AllergicRhinitisanditsImpactonAsthma,ARIA)诊疗指南自2001年在临床应用以来[1],对提高变应性鼻炎(allergicrhinitis,AR)的治疗水平以及认识上、下呼吸道的相关性起到积极