MicroRNA Regulation in Osteoporotic Bone Health

Osteoporosis is characterised by diminished bone density and microarchitectural deterioration, driven by an imbalance between bone resorption and formation. MicroRNAs (miRNAs), a class of small non‐coding RNAs of approximately 22 nucleotides, exert post-transcriptional control over gene expression and are now recognised as pivotal regulators of osteoblast and osteoclast function. In osteoporotic bone, specific miRNAs can either promote osteoclastogenesis and matrix degradation or enhance osteoblast differentiation and matrix deposition. Aberrant expression of these miRNAs has been linked to changes in key transcription factors, signalling pathways—such as WNT/β-catenin, PI3K-Akt and RANK/RANKL—and epigenetic modifiers, ultimately influencing bone remodelling dynamics. Circulating miRNAs offer insight into systemic bone health, with distinct signatures emerging as potential early biomarkers. Moreover, therapeutic modulation of miRNA activity, through antagomirs or miRNA mimics, holds promise for restoring skeletal integrity in osteoporotic patients.

Research from Nature Portfolio

Analysis of bone biopsies and high‐resolution imaging has revealed that levels of miR-29b-3p, miR-324-3p and miR-550a-3p in serum correlate closely with trabecular microarchitecture and dynamic histomorphometric indices of bone formation. Lower circulating concentrations of miR-29b-3p and miR-324-3p were observed in patients receiving anti-resorptive therapy, suggesting these miRNAs respond to changes in bone turnover. In a separate study, two circulating miRNAs, hsa-miR-122-5p and hsa-miR-4516, were found to discriminate between healthy, osteopaenic and osteoporotic individuals, and their levels were associated with fragility fractures and decreased bone mineral density. These findings underscore the potential utility of specific miRNAs as non-invasive indicators of bone loss and microstructural deterioration in osteoporosis.

MicroRNA Regulation in Osteoporotic Bone Health publication trend

The graph below shows the total number of articles in microrna regulation in osteoporotic bone health across all publications each year (not limited to Nature Index journals).

Technical terms

MicroRNA (miRNA): A short non-coding RNA molecule that regulates gene expression by binding to target mRNAs and inhibiting translation or promoting degradation.

Osteoblast: A bone-forming cell responsible for the synthesis and mineralisation of bone matrix.

Osteoclast: A multinucleated cell that resorbs bone matrix during normal remodelling and pathological bone loss.

Bone mineral density (BMD): A measurement of the mineral content in bone, used as an indicator of bone strength and fracture risk.

Histomorphometry: The quantitative analysis of bone microarchitecture and remodelling through imaging and tissue staining techniques.

References

1. The MicroRNAs in the Pathophysiology of Osteoporosis. International Journal of Molecular Sciences (2024).
2. Yigu decoction regulates plasma miRNA in postmenopausal osteoporosis patients: a randomized controlled trial. Frontiers in Pharmacology (2024).
3. Bone-related Circulating MicroRNAs miR-29b-3p, miR-550a-3p, and miR-324-3p and their Association to Bone Microstructure and Histomorphometry. Scientific Reports (2018).
4. Circulating microRNAs as potential diagnostic biomarkers for osteoporosis. Scientific Reports (2018).