Project description:At diagnosis approximately 75% of bladder urothelial carcinomas are non muscle invasive bladder cancers (Ta, T1 and Tis), 20% are muscle invasive bladder cancer (T2-T4) and 5% are already metastatic. Non muscle invasive bladder cancers are characterized by tumor recurrence in 60% to 85% of cases and, therefore, long-term followup is needed. The current standard methods to detect and monitor bladder cancer are cystoscopy and cytology. Cystoscopy is an invasive method and cytology is hampered by low sensitivity, especially for low grade tumors. So there is need to develop reliable and noninvasive methods to detect and predict bladder cancer biological behavior. So we have performed high density oligonucleotide microarray for discovery of new molecular markers to diagnose and predict the outcome of bladder cancer. Under an ethical guideline of Chhatrapati Shahuji Maharaj Medical University, India histologically confirmed seven bladder cancer patients were recruited from Department of Urology, Chhatrapati Shahuji Maharaj Medical University, Lucknow, India. Total RNA was extracted from tumor biopsies and hybridized on affymetrix Human Gene ST 1.1 array to determine differentially expressed genes in urinary bladder cancer with muscle invasion in comparison of normal human urinary bladder.
Project description:Gene expression profiling of 82 human non-muscle invasive bladder carcinoma and 4 normal bladder samples, for a total of 86 tissues. A Cartes díIdentite des Tumeurs (CIT) study from the 'Institut Curie' and the french 'Ligue Nationale Contre le Cancer' (http://cit.ligue-cancer.net/).
Project description:This RNA-sequencing cohort includes 52 Non-muscle Invasive Bladder cancer (NMIBC) samples and 6 Muscle Invasive Bladder cancer (MIBC) samples.
Project description:At diagnosis approximately 75% of bladder urothelial carcinomas are non muscle invasive bladder cancers (Ta, T1 and Tis), 20% are muscle invasive bladder cancer (T2-T4) and 5% are already metastatic. Non muscle invasive bladder cancers are characterized by tumor recurrence in 60% to 85% of cases and, therefore, long-term followup is needed. The current standard methods to detect and monitor bladder cancer are cystoscopy and cytology. Cystoscopy is an invasive method and cytology is hampered by low sensitivity, especially for low grade tumors. So there is need to develop reliable and noninvasive methods to detect and predict bladder cancer biological behavior. So we have performed high density oligonucleotide microarray for discovery of new molecular markers to diagnose and predict the outcome of bladder cancer.
Project description:miRNAs are involved in cancer development and progression,acting as tumor suppressors or oncogenes. Half of the human miRNAs are located in cancer-associated genomic regions and can function as tumor suppressor genes or oncogenes depending on their targets miRNA profiling was performed on paired bladder cancer tissues and differentially expressed miRNAs were identified in BC and adjacent noncancerous tissues of any disease stage/grade. Ten paired bladder cancer tissues (5 low-grade non-muscle-invasive bladder cancer[NMIBC] and 5 high-grade muscle-invasive bladder cancer[MIBC]) were sent to CapitalBio Corp. (Beijing) for noncoding RNA microarray analysis. The microarray analysis was done as described on the Web site of CapitalBio. NMIBC samples include 07A, 19A, 23A, 24A and T63 while coresponding pairs include 07B, 19B, 23B, 24B and 63. MIBC samples include 10A, 20A, 21A, 34A and 49A while coresponding pairs include 10B, 20B, 21B, 34B and 49B.
Project description:Bladder cancer affects over half a million people worldwide each year. Recent advances in early detection allowed a successful management of non-aggressive cancers, yet the recurrence rate remains high. Aggressive muscle-invasive bladder tumours are life-threatening and challenging to cure. Therefore, understating of key molecular pathways involved in cancer progression is critical for developing of new personalised targeted therapies. Recently, non-coding RNAs (ncRNAs) have emerged as key regulators orchestrating complex biological processes in cancer, yet their function is not fully understood. Here, we compare non-muscle invasive and muscle invasive cell lines and identify a ncRNA gene MIR205HG and its transcript LEADR among the top ncRNAs lost in muscle invasive urothelial tumours. We show that LEADR expression is epigenetically regulated by master transcription factor p63. LEADR is localised in the nuclei of non-muscle invasive bladder cancer cells where it dampens hyperactivation of interferon stimulated genes possibly increasing sensitivity of bladder cancer cells to interferon signalling. These findings uncover an anti-tumoral role of non-coding RNA LEADR in mediating immune response in bladder cancer.
Project description:Cystoscopic bladder biopsies were obtained from 19 patients and 11 controls between 2004 and 2005. Whole transcript based arrays were used to identify differences in expression profile between cancer and normal, muscle-invasive or non-muscle invasive cancer and normal, grade 1 and grade 3 bladder cancer.