Abstract
Hepatocellular carcinoma is a malignancy associated with high mortality and
increasing incidence. Early detection of this disease could help increase survival and
overall patient benefit. Non-invasive strategies for the diagnosis of this medical condition
are of utmost importance. In this scope, the detection of hepatocellular carcinoma biomarkers
can provide a useful diagnostic tool. Aptamers are short, single-stranded DNAs
or RNAs that can specifically bind selected analytes and act as pseudo-biorecognition elements
that can be employed for electrode functionalization. Also, other types of DNA sequences
can be used to construct DNA-based biosensors applied for the quantification of
hepatocellular carcinoma biomarkers. Herein, we analyze recent examples of aptasensors
and DNA biosensors for the detection of hepatocellular carcinoma biomarkers, like micro-
RNAs, long non-coding RNAs, exosomes, circulating tumor cells, and proteins. The
literature data are discussed comparatively in a critical manner, highlighting the advantages
of using electrochemical biosensors in diagnosis, as well as the use of nanomaterials
and biocomponents in the functionalization of electrodes for improved sensitivity
and selectivity.
Keywords:
Hepatocellular carcinoma (HCC), aptamers, biomarkers, electrochemical biosensors, DNA sequences, miRNAs.
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