简介：Objective:TostudytherelationshipbetweentheexpressionofBax,Bcl-2proteins,andapoptosisinradiationcompoundwoundhealingofrats.Methods:Apoptosis,BaxandBcl-2proteinswereestimatedbyinsituterminallabeling(TUNEL)andimmunohistochemicalmethods.Results:(1)Changesoftheapoptosisinwoundhealingshowedthreetypicalcharacteristics:earlyoccurrence,highfrequencyanddelayeddisappearanceafterradiationtoratswhencomparedwiththoseofsimplewoundgroup,whichmightbeanimportantreasonforradiation-induceddelayedwoundhealing.(2)TheexpressionofBaxproteinincreasedevidentlywiththeincrementofapoptosisandshowedagoodcorrespondingrelationshipwiththeapoptoticfrequencyintheprocessofwoundhealing.WhiletheexpressionofBcl-2proteindecreasedobviouslyastheapoptosisreachedamaximumandshowedincreasingtendencyuptonormallevelwhentheapoptosisdecreaseddistinctively.Conclusions:BaxandBcl-2proteinsplayanimportantroleintheapoptoticregulationofradiationcompoundwoundhealinginrats.