You have accessJournal of UrologyBladder Cancer: Basic Research1 Apr 2011870 A NEW MOLECULAR CHEMOSENSITIVITY TEST TO IMPROVE AND PREDICT EFFICACY OF INTRAVESICAL ADJUVANT THERAPY IN NMIBC (NON MUSCLE INVASIVE BLADDER CANCER) Ettore De Berardinis, Gian Maria Busetto, Gabriele Antonini, Chiara Nicolazzo, Arianna Petracca, Paola Gazzaniga, and Vincenzo Gentile Ettore De BerardinisEttore De Berardinis Roma, Italy More articles by this author , Gian Maria BusettoGian Maria Busetto Roma, Italy More articles by this author , Gabriele AntoniniGabriele Antonini Roma, Italy More articles by this author , Chiara NicolazzoChiara Nicolazzo Roma, Italy More articles by this author , Arianna PetraccaArianna Petracca Roma, Italy More articles by this author , Paola GazzanigaPaola Gazzaniga Roma, Italy More articles by this author , and Vincenzo GentileVincenzo Gentile Roma, Italy More articles by this author View All Author Informationhttps://doi.org/10.1016/j.juro.2011.02.694AboutPDF ToolsAdd to favoritesDownload CitationsTrack CitationsPermissionsReprints ShareFacebookTwitterLinked InEmail INTRODUCTION AND OBJECTIVES The treatment choice for high risk NMIBC is still controversial, and no markers are still available to guide the urologist in the individualization of therapy. Although intravesical chemo and immuno treatments represent the gold standard in adjuvant setting after TURB the percentage of recurrence and progression under treatment is still high. We here describe the design of a chemosensitivity assay based on the expression of genes involved in the resistance to standard intravesical regimens. METHODS 128 patients with high risk NMIBC have been enrolled, all candidates for TUR-B followed by intravesical treatment. All patients have been evaluated by cystoscopy 3 and 6 months after TUR-B. One mg of tumoral tissue from each patient was kept for molecular assay subjected to RNA extraction and RT-PCR amplifications with primers specific for MRP1, MRP2, hENT1, dCK, à5â1 integrin, used to trace a specific chemosensitivity profile to drugs commonly used in intravesical regimen: anthracyclines, mitomycin-c, gemcitabine and BCG. On the basis of densitometric analysis of the amplification bands obtained by normalisation with the GAPDH internal controls, we obtained for each patient a chemosensitivity molecular profile. We considered high, intermediate and low sensitivity to mitomycin c, epirubicin, and doxorubicin a ratio MRP/GAPDH <1, =1, >1 respectively. For gemcitabine resistance, we considered sensitivity, intermediate sensitivity and resistance a ratio hENT-dCK/GAPDH >1, =1 and <1 respectively. Sensitivity to BCG was evaluated as follows: high, intermediate, low sensitivity in the presence of à5â1/GAPDH >1; =1; <1 respectively. We then compared both the molecular profiles of chemosensitivity to the clinical response to the intravesical regimen adopted in the first 6 months of follow up. RESULTS This chemosensitivity test was able to predict response to treatment in 93% of patients. The assay is easy to perform with low costs and rapid time of execution. CONCLUSIONS Our results are encouraging in the view of an individualised therapeutic approach, to provide a higher treatment success rate while sparing patients unnecessary toxicity from drugs that are not suited for their tumors. © 2011 by American Urological Association Education and Research, Inc.FiguresReferencesRelatedDetails Volume 185Issue 4SApril 2011Page: e348-e349 Advertisement Copyright & Permissions© 2011 by American Urological Association Education and Research, Inc.MetricsAuthor Information Ettore De Berardinis Roma, Italy More articles by this author Gian Maria Busetto Roma, Italy More articles by this author Gabriele Antonini Roma, Italy More articles by this author Chiara Nicolazzo Roma, Italy More articles by this author Arianna Petracca Roma, Italy More articles by this author Paola Gazzaniga Roma, Italy More articles by this author Vincenzo Gentile Roma, Italy More articles by this author Expand All Advertisement Advertisement PDF downloadLoading ...