MiRNAs: regulators of human disease
Abstract:
MicroRNAs (miRNAs) represent the mediators of important leading biological functions of molecular pathways in humans. They are a class of very small, non-coding RNAs; their function is the balance of the protein levels at the post-transcriptional stage. They are implicated in molecular processes and diseases, including diabetes, metabolism, autoimmune diseases, angiogenesis and tumorigenesis, and female fertility, exhibiting an altered expression profile. Any process taking place in the human organism is intertwined by miRNAs. MiRNAs have an impact on the biochemistry of pathways of the invisible molecular world. They circulate in a stable chemical configuration in body fluids (tears, serum, plasma, amniotic fluid, ascetic fluid, urine) with their molecular sequence specificity remaining unchanged. Their indisputable molecular stability ranks them as extremely vigorous potential markers in human disease. MiRNAs demonstrate a specific expressive signature, representative of the tissue specificity and the clinical staging. The shift on the concentration and expression of a miRNA reflects the course of a disease. MiRNAs may operate as oncogenes (tumor growth) or tumor suppressor (tumor reduction) genes in cancer pathways. In malignant disease, proliferation, maintenance, and progression of cancer cells is induced by the stimulation of the oncogenes or complete deactivation of the tumor suppressor gene activity.
Insights
MicroRNAs (miRNAs) are small non-coding RNAs crucial for regulating gene expression and maintaining biological balance. Their stability in body fluids makes them promising biomarkers for diagnosing and monitoring diseases, including cancer.
Area of Science:
- Biochemistry
- Molecular Biology
- Genetics
Background:
- MicroRNAs (miRNAs) are small, non-coding RNAs that regulate protein levels post-transcriptionally.
- They are involved in numerous biological processes and diseases, including metabolism, autoimmune disorders, angiogenesis, and tumorigenesis.
- Altered miRNA expression is a hallmark of various pathological conditions.
Purpose of the Study:
- To highlight the critical role of miRNAs in human biological functions and disease.
- To emphasize the potential of miRNAs as stable biomarkers in body fluids.
- To discuss the dual role of miRNAs as oncogenes or tumor suppressors in cancer.
Main Methods:
- Review of current literature on miRNA function and disease association.
- Analysis of miRNA stability and detectability in various human body fluids.
- Examination of miRNA expression profiles in different disease states.
Main Results:
- MiRNAs are integral to nearly all human biological processes.
- MiRNAs are chemically stable in body fluids like serum and urine, retaining sequence specificity.
- Specific miRNA signatures correlate with tissue origin and disease stage, indicating diagnostic potential.
Conclusions:
- MiRNAs are vital regulators of molecular pathways and disease progression.
- Their stability and specific expression patterns position them as powerful biomarkers for human diseases.
- Understanding miRNA function is key to developing novel therapeutic strategies, particularly in oncology.
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