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MicroRNAs have diagnostic and prognostic potential in urinary bladder cancer
Date:8/15/2013

did not. With one exception, no correlation was found between tumor stage and miRNA levels.

When all 15 of the selected miRNAs were considered together, they correctly classified 100% of tissues as either normal or malignant. Further analysis identified four miRNAs that led to 100% correct classification, and one miRNA (miR-130b) that by itself had an 81% accuracy rate. "These results underline the great potential of miRNAs to serve as diagnostic markers, as previously noted for other urological tumors," says lead investigator Klaus Jung, MD, the Department of Urology at the University Hospital Charit, Berlin and the Berlin Institute for Urologic Research.

The investigators found that tumor grading could not be correlated with overall survival. Yet, they were able to find two miRNAs that significantly correlated with survival: miR-141 and miR-205. miR-141 showed a trend (P=0.08) of being able to stratify patients with muscle-invasive tumors into two groups with different overall survival times. "This finding could be of clinical importance, but these results must be interpreted cautiously," says Dr. Jung. "However, previously published studies underline the possible prognostic potential of miRNAs to predict progression and disease-specific or overall survival in bladder cancer patients."

miRNAs are small non-coding RNAs that contain between 19 and 24 nucleotides. miRNAs regulate gene expression by degrading messenger RNAs or impairing their translation. In recent years there has been a growing interest in miRNAs as potential diagnostic and/or prognostic biomarkers in cancers and other diseases.


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Contact: Eileen Leahy
jmdmedia@elsevier.com
732-238-3628
Elsevier Health Sciences
Source:Eurekalert

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