Abstract:Objective Toanalyzetheeffectofsplicingfactor3Bsubunit1/forkheadbox M1/transcriptionfactor activatedproteinkinaseB(SF3B1/FOXM1/JUNB)axisregulatedexpressionoftranscriptionfactor21antibody(SOX21)on thebiologicalbehaviorofcervicalcancercells.Methods Thepara-canceroustissuesandcanceroustissuesof50cervical cancerpatientsadmittedtotheAffiliatedCancerHospitalofXinjiangMedicalUniversityfrom March2022toDecember2023 wereselectedasthestudyobjects.TheexpressionlevelsofSF3B1,FOXM1,JUNBandSOX21weredetectedbyreal-time fluorescencequantitativePCR.Thebiologicalbehaviorsofcervicalcancercells(proliferation,migrationandinvasion)were detectedbyTranswellandcellcountingkit-8(CCK8).TheproteinexpressionsofSF3B1,FOXM1,JUNBandSOX21were determinedby Westernblot.Results Compared withtheadjacenttissues,thecervicalcancertissuesshowedalower expressionlevelofJUNBandhigherexpressionlevelsofFOXM1,SOX21,andSF3B1,andthedifferenceswerestatistically significant(P <0.05).Compared withthesi-NCgroup,thesi-SF3B1/FOXM1/JUNBgroupexhibitedahigheroptical density(OD)450valueat0h,butlowerinvasivecellcount,migratorycellcount,(24,48h)OD450values,SF3B1, FOXM1,andJUNB,andthedifferenceswerestatisticallysignificant(P<0.05).ComparedwiththeOE-NCgroup,the OE-SOX21groupshowedhighermigratorycellcount,(0,24,48h)OD450values,SOX21,andinvasivecellcount,andthe differenceswerestatisticallysignificant (P <0.05).Compared withthesi-SF3B1/FOXM1/JUNB+ OE-NCgroup,the si-SF3B1/FOXM1/JUNB+OE-SOX21groupexhibitedhigherlevelsofSOX21,SF3B1,FOXM1,JUNB,(0,24,48h)OD450 values,invasivecellcount,and migratorycellcount,andthedifferences werestatisticallysignificant (P <0.05).Conclusion SF3B1/FOXM1/JUNBaxiscanpromotetheinvasion,proliferationand migrationofcervicalcancercellsby activatingSOX21expression