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Amplification-Free Detection of Gene Fusions in Prostate Cancer Urinary Samples Using mRNA–Gold Affinity Interactions by Kevin M. Koo; Laura G. Carrascosa; Muhammad J. A. Shiddiky; Matt Trau is a Chemistry article available to read on EtoBox.

What is Amplification-Free Detection of Gene Fusions in Prostate Cancer Urinary Samples Using mRNA–Gold Affinity Interactions about?

A crucial issue in present-day prostate cancer (PCa) detection is the lack of specific biomarkers for accurately distinguishing between benign and malignant cancer forms. This is causing a high degree of overdiagnosis and overtreatment of otherwise clinically insignificant cases. As around half of all malignant PCa cases display a detectable gene fusion mutation between the TMPRSS2 promoter sequence and the ERG coding sequence (TMPRSS2:ERG) in urine, noninvasive screening of TMPRSS2:ERG mRNA in patient urine samples could improve the specificity of current PCa diagnosis. However, current gene fusion detection methodologies are largely dependent on RNA enzymatic amplification, which requires extensive sample manipulation, costly labels for detection, and is prone to bias/artifacts. Herein we introduce the first successful amplification-free electrochemical assay for direct detection of TMPRSS2:ERG mRNA in PCa urinary samples by selectively isolating and adsorbing TMPRSS2:ERG mRNA onto bare gold electrodes without requiring any surface modification. We demonstrated excellent limit-of-detection (10 cells) and specificity using PCa cell line models, and showcased clinical utility by ac

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Author

Kevin M. Koo; Laura G. Carrascosa; Muhammad J. A. Shiddiky; Matt Trau

Publisher

American Chemical Society (ACS)

Published

2016

Language

EN

Field

Chemistry (Physical Sciences)