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Published on: October 7, 2025
miRNAs in Melanoma: Tumor Suppressors and Oncogenes with Prognostic Potential
Michal Wozniak, Aleksandra Mielczarek, Malgorzata Czyz1
1Department of Molecular Biology of Cancer, Medical University of Lodz, Mazowiecka 6/8, 92-215 Lodz, Poland. malgorzata.czyz@umed.lodz.pl.
Abstract:
MicroRNAs (miRNAs), which are small non-coding RNA molecules that post-transcriptionally regulate the expression of target genes, control the vast majority of cellular events, including proliferation, differentiation, survival, senescence, autophagy, metabolism and genome stability. Even slight alterations in miRNA expression levels may induce the development of pathological states, including cancer. Several studies have already demonstrated the importance of miRNAs in the regulation of melanocytes. Upregulation of oncogenic miRNAs (oncomiRs), mainly by amplification and translocation of miRNA genes, and downregulation of oncosuppressor miRNAs (anti-oncomiRs) by deletion and other mutations, promoter methylation and abnormal processing contributes to melanoma initiation and progression. At each phase of melanoma progression, tumor cells exhibit distinct profiles of miRNA expression, as compared with normal melanocytes. Moreover, as miRNAs are stable molecules that can be identified in bodily fluids, such as blood and saliva, they can serve as potent non-invasive prognostic markers of disease progression and response to therapy. This review summarizes recent findings regarding miRNA-mediated control of melanocytes and melanoma development, and presents miRNAs as prognostic markers for this disease.
Insights
MicroRNAs regulate cellular functions and are crucial in melanoma development. Altered microRNA levels are linked to melanoma progression and can serve as non-invasive prognostic markers.
Area of Science:
- Molecular Biology
- Genetics
- Oncology
Background:
- MicroRNAs (miRNAs) are small non-coding RNAs regulating gene expression.
- Dysregulation of miRNAs is implicated in various cellular processes and diseases, including cancer.
- Melanocytes and melanoma development are significantly influenced by miRNA activity.
Purpose of the Study:
- To review the role of miRNAs in melanocyte regulation and melanoma progression.
- To highlight the diagnostic and prognostic potential of miRNAs in melanoma.
- To summarize recent findings on miRNA-mediated control in melanoma.
Main Methods:
- Literature review of studies on miRNA function in melanocytes and melanoma.
- Analysis of miRNA expression profiles in different stages of melanoma.
- Investigation of miRNA stability and detectability in bodily fluids.
Main Results:
- Altered miRNA expression (upregulation of oncomiRs, downregulation of anti-oncomiRs) contributes to melanoma initiation and progression.
- Distinct miRNA expression profiles characterize different phases of melanoma.
- Stable miRNAs found in bodily fluids offer potential as non-invasive biomarkers.
Conclusions:
- MicroRNAs play a critical role in the regulation of melanocytes and the pathogenesis of melanoma.
- MicroRNAs represent promising non-invasive prognostic markers for melanoma progression and therapy response.
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