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Updated: Jun 26, 2026

MicroRNA Amplification and Recognition through Locked-nucleic-acid In situ Hybridization as a Novel Detection and Quantification Method
Published on: October 7, 2025
MicroRNAs and cancer-the search begins!
Anastasis Oulas1, Martin Reczko, Panayiota Poirazi
1Institute of Molecular Biology and Biotechnology, Foundation for Research and Technology-Hellas, Heraklion, Greece.
Abstract:
For almost three decades, cancer was thought to result from changes in the structure and/or expression of protein coding genes. The discovery of thousands of genes that produce noncoding RNA (ncRNA) transcripts in the past few years suggested that the molecular biology of cancer is much more complex. MicroRNAs (miRNAs), an important group of ncRNAs, have recently been associated with tumorigenesis by acting either as tumor suppressors or oncogenes. Experimental prediction of miRNA genes is a slow process, because of the difficulties of cloning ncRNAs. Complementary to experimental approaches, a number of computational tools trained to recognize features of the biogenesis of miRNAs have significantly aided in the prediction of new miRNA candidates. By narrowing down the search space, computational approaches provide valuable clues as to which are the dominant features that characterize these regulatory units and which genes are their most likely targets. Moreover, through the use of high-throughput expression profiling methods, many molecular signatures of miRNA deregulation in human tumors have emerged. In this review, we present an overview of existing computational methods for identifying miRNA genes and assessing their expression levels, and analyze the contribution of such tools toward illuminating the role of miRNAs in cancer.
Insights
Cancer research now includes noncoding RNAs (ncRNAs), specifically microRNAs (miRNAs), which act as tumor suppressors or oncogenes. Computational tools accelerate the identification and understanding of miRNA roles in cancer development.
Area of Science:
- Molecular Biology
- Genetics
- Bioinformatics
Background:
- Historically, cancer research focused on protein-coding genes.
- Recent discoveries reveal thousands of noncoding RNA (ncRNA) genes, significantly increasing cancer's molecular complexity.
- MicroRNAs (miRNAs), a key class of ncRNAs, are implicated in tumorigenesis as either tumor suppressors or oncogenes.
Purpose of the Study:
- To review computational methods for identifying miRNA genes.
- To assess computational tools for determining miRNA expression levels.
- To analyze the contribution of computational approaches to understanding miRNA roles in cancer.
Main Methods:
- Overview of existing computational tools for miRNA gene prediction.
- Discussion of methods for assessing miRNA expression levels.
- Analysis of high-throughput expression profiling data in human tumors.
Main Results:
- Computational tools aid in predicting new miRNA candidates by recognizing biogenesis features.
- These approaches help identify key characteristics of regulatory miRNA units and their gene targets.
- Molecular signatures of miRNA deregulation in human tumors have been identified using expression profiling.
Conclusions:
- Computational methods are crucial for accelerating miRNA discovery and characterization.
- These tools provide valuable insights into the complex roles of miRNAs in cancer.
- Understanding miRNA deregulation is key to advancing cancer research and therapy.
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