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Abstract
Since their discovery in 1993, microRNAs (miRNAs) have been identified as important gene regulators in many biological processes and as key molecular players in human disease, including cancer where they show specific pathogenic deregulation. Their remarkable chemical stability, the availability of very sensitive miRNA detection methods and the fact that miRNAs can be extracted from and detected in various kinds of clinically relevant samples, such as solid tissues, body fluids and secretions make them excellent candidate biomarkers. However, no miRNA has yet entered the level of practical clinical relevance. We present a brief background and some key aspects and challenges of miRNAs as cancer biomarkers, we discuss shortfalls and identify possible routes towards the use of miRNAs as reliable biomarkers for cancer.
Disclosure statement
The authors report no conflict of interest. The authors alone are responsible for the content and writing of the paper.
Funding
This work was supported by grants from the South-East Norway Health Authority.