Extracellular miRNAs: origin, function and biomarkers in hepatic diseases

Area of Science:

• Molecular Biology
• Biochemistry
• Genetics

Background:

• MicroRNAs (miRNAs) are non-coding RNAs regulating gene expression post-transcriptionally.
• Extracellular miRNAs are found in mammalian body fluids and are resistant to nucleases.
• Aberrant miRNA expression is linked to various diseases, suggesting diagnostic potential.

Purpose of the Study:

• To review the biogenesis and post-transcriptional regulation of miRNAs.
• To discuss the origin and release mechanisms of extracellular miRNAs.
• To explore the role of extracellular miRNAs in cell-cell communication and as diagnostic biomarkers, particularly for hepatic diseases.

Main Methods:

• Literature review of current research on miRNA biogenesis and function.
• Analysis of evidence regarding extracellular miRNA origins and release.
• Synthesis of novel perspectives on miRNA-mediated cell communication.

Main Results:

• miRNAs regulate gene expression by affecting mRNA translation and stability.
• Extracellular miRNAs are present in body fluids and linked to disease states.
• Potential roles in cell communication and as diagnostic markers are emerging.

Conclusions:

• Extracellular miRNAs are promising noninvasive biomarkers for disease diagnosis.
• Further research is needed to fully elucidate the origin and function of extracellular miRNAs.
• This review highlights their utility in diagnosing hepatic diseases.