Blockage of IGF－1R signaling sensitizes urinary bladder cancer cells to mitomycin

摘要 Amajorproblemwhichispoorlyunderstoodinthemanagementofbladdercancerislowsensitivitytochemotherapyandhighrecurrenceaftertransurethralresection.Insulin-likegrowthfactor1receptor(IGF-1R)signalingplaysaveryimportantroleinprogression,invasionandmetastasisofbladdercancercells.Inthisstudy,weinvestigatedwhetherIGF-1Rwasinvolvedinthegrowthstimulatingactivityanddrugresistanceofbladdercancercells.Theresultsshowed:ThemRNAsofIGF-1,IGF-2andIGF-1Rwerestronglyexpressedinserum-freeculturedT24cellline,whereasnormalurothelialcellsdidnotexpressthesefactors/receptorsoronlyintracelevels;T24cellrespondedfarbettertogrowthstimulationbyIGF-1thandidnormalurothelialcells;blockageofIGF1Rbyantisenseoligodeoxynucleotide(ODN)significantlyinhibitedthegrowthofT24cellandenhancedsensitivityandapoptosisofT24cellstomitomycin(MMC).TheseresultssuggestedthatblockageofIGF-IRsignalingmightpotentiallycontributetothetreatmentofbladdercancercellswhichareinsensitivetochemotherapy.

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Blockage of IGF－1R signaling sensitizes urinary bladder cancer cells to mitomycin－mediated cytotoxicity

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Blockage of IGF－1R signaling sensitizes urinary bladder cancer cells to mitomycin－mediated cytotoxicity

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