MiRNA-Mediated Regulation in Osteoarthritis Across Joint Tissues, Including Translational Perspectives in Dogs.

Area of Science:

• Molecular Biology
• Biochemistry
• Veterinary Medicine

Background:

• Osteoarthritis (OA) is a complex, whole-joint disease involving interconnected pathological processes.
• MicroRNAs (miRNAs) are crucial post-transcriptional regulators integrating various disease cues in OA.
• Human OA research extensively links miRNA dysregulation to disease mechanisms and identifies circulating miRNAs (cmiRNAs) as potential biomarkers.

Purpose of the Study:

• To critically synthesize miRNA-mediated regulatory mechanisms in human OA.
• To leverage human OA insights to define research priorities for canine OA.
• To establish a comparative framework for identifying translational targets in canine OA.

Main Methods:

• Literature review synthesizing existing research on miRNAs in human OA.
• Comparative analysis of molecular contexts between human and canine OA.
• Identification of research gaps and priorities in canine miRNA research.

Main Results:

• miRNA dysregulation is implicated in cartilage breakdown, stress response, and inter-tissue communication in human OA.
• Canine OA research on miRNAs is limited, with only one pilot study existing.
• Shared molecular pathways suggest potential for comparative miRNA research.

Conclusions:

• Circulating miRNAs (cmiRNAs) represent promising non-invasive translational targets for canine OA.
• Further experimental validation is needed in canine OA models.
• A comparative framework focusing on shared molecular contexts is essential for advancing canine OA miRNA research.