DNA methylation and noncoding RNA in OA: Recent findings and methodological advances

Area of Science:

• Epigenetics
• Musculoskeletal Disorders
• Genomics

Background:

• Osteoarthritis (OA) is a chronic, progressive joint disease, historically viewed as mechanical wear and tear.
• Emerging understanding positions OA as a complex systemic disorder involving gene-environment interactions.
• Epigenetic modifications are increasingly recognized as significant contributors to OA pathogenesis.

Purpose of the Study:

• To systematically review and discuss recent findings and methodological advancements in osteoarthritis epigenetics.
• To explore the roles of DNA methylation and noncoding RNAs in OA.
• To highlight potential clinical applications of epigenetic research in OA.

Main Methods:

• Systematic review of studies on DNA methylation and noncoding RNAs in human OA and animal models.
• Inclusion of research from 1985 onwards, focusing on microarray and next-generation sequencing (NGS) data.
• Analysis of epigenetic alterations in cartilage, subchondral bone, and peripheral blood mononuclear cells.

Main Results:

• Recent advancements in microarray and NGS technologies enable detailed evaluation of epigenetic aberrations in OA.
• Widespread epigenetic alterations, including DNA methylation and noncoding RNAs, are observed in OA patients beyond cartilage.
• Studies in subchondral bone and peripheral blood mononuclear cells reveal potentially clinically significant epigenetic patterns.

Conclusions:

• Despite extensive research, the full scope of OA epigenetics remains to be elucidated.
• Future studies are expected to deepen the understanding of OA pathophysiology.
• Epigenetic insights may lead to novel diagnostics and treatments for osteoarthritis.