简介：Objective:ToinvestigatetheeffectofsubstanceP(SP)ongeneexpressionoftransforminggrowthfactorβ-1(TGFβ-1),transforminggrowthfactorreceptor-1(TGFR-1)andtransforminggrowthfactorreceptor-2(TGFR-2)infibroblastsculturedinvitrofromrat'sgranulationtissues.Methods:Thefibroblastsfromthegranulationtissuesintheskeletalmuscleofrat'shindlimbsinjuredbyformaldehydewereculturedinvitro.Whendifferentconcentrations(10-9-10-5mol/L)ofSPwereaddedintotheculturemedium,thechangesofgeneexpressionofTGFβ-1,TGFR-1andTGFR-2intheculturedfibroblastswereobservedwithreversetranscriptionpolymerasechainreactionatdifferentintervals(0,3,6,12and24hoursafterincubation).Results:ThegeneexpressionofTGFβ-1,TGFR-1andTGFR-2inthefibroblastsculturedfromrat'sgranulationtissueswasup-regulatedbySP.ThepeaklevelofthemRNAexpressionwasfoundat10-8mol/LSPandtheup-regulationeffectwasnotfoundat10-5mol/Land10-6mol/L.ThepeaklevelsofgeneexpressionofTGFβ-1,TGFR-1andTGFR-2inthefibroblaststreatedwithSPwereachievedat6and12hours,respectively.Conclusions:SPhasup-regulationeffectonthegeneexpressionofTGFβ-1,TGFR-1andTGFR-2infibroblastsfromrat'sgranulationtissuesinvitro,andtheeffectisrelatedtodifferentstimulatingconcentrationsofSP.Itmaybeconcernedwithproliferationanddifferentiationoffibroblastsandformationofscartissuesduringwoundhealing.