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Published on: March 18, 2019
miR-376c-3p mediates icariin's anti-osteoclastogenic effect by targeting Mmp3
Hui Yan1,2,3, Jingdi Li1,2,3, Dingbang Xie1,2,3
1Academy of Integrative Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou, China.
Background:
MicroRNAs (miRNAs) are crucial regulators of osteoclast differentiation. Icariin (ICA), the primary active constituent of the traditional Chinese herb Epimedium, has been shown to inhibit osteoclastogenesis. However, whether ICA suppresses osteoclast differentiation via miRNA regulation remains to be elucidated.
Methods:
We employed bioinformatic analysis coupled with in vivo validation to screen for and identify potential targets that mediate the effects of ICA on osteoclast formation. Subsequently, we carried out in vitro experiments involving the overexpression and knockdown of miR-376c-3p in bone marrow-derived macrophages (BMMs). Additionally, luciferase reporter assays and western blot analysis were utilized to ascertain the direct targets of miR-376c-3p.
Results:
It was confirmed that miR-376c-3p plays a regulatory role in osteoclast differentiation within bone marrow-derived macrophages (BMMs). Notably, the knockdown of miR-376c-3p led to a partial reversal of the inhibitory effect that ICA exerts on osteoclastogenesis. Furthermore, matrix metalloproteinase-3 (Mmp3) was validated as a direct target of miR-376c-3p, providing evidence to suggest that ICA likely mediates its effects through the miR-376c-3p/Mmp3 signaling axis.
Conclusion:
Our findings demonstrate that ICA exerts its anti-osteoporotic effect by downregulating the miR-376c-3p-mediated Mmp3 expression. This study provides insights that potentially facilitate ICA's clinical application.
Insights
Icariin (ICA) inhibits osteoclast formation by downregulating miR-376c-3p, which targets Mmp3. This reveals ICA
Area of Science:
- Molecular Biology
- Cell Biology
- Pharmacology
Background:
- MicroRNAs (miRNAs) are key regulators of osteoclast differentiation.
- Icariin (ICA), derived from Epimedium, inhibits osteoclastogenesis.
- The role of miRNA regulation in ICA's effect on osteoclast differentiation is unclear.
Purpose of the Study:
- To investigate whether ICA suppresses osteoclast differentiation through miRNA regulation.
- To identify specific miRNAs and their targets involved in ICA's mechanism of action.
- To elucidate the signaling pathway mediating ICA's anti-osteoporotic effects.
Main Methods:
- Bioinformatic analysis and in vivo validation were used to identify potential miRNA targets.
- In vitro experiments included overexpression and knockdown of miR-376c-3p in bone marrow-derived macrophages (BMMs).
- Luciferase reporter assays and western blot analysis confirmed direct targets of miR-376c-3p.
Main Results:
- miR-376c-3p was confirmed to regulate osteoclast differentiation in BMMs.
- Knockdown of miR-376c-3p partially reversed ICA's inhibition of osteoclastogenesis.
- Matrix metalloproteinase-3 (Mmp3) was identified as a direct target of miR-376c-3p, indicating an ICA-miR-376c-3p-Mmp3 axis.
Conclusions:
- ICA exerts anti-osteoporotic effects by downregulating miR-376c-3p-mediated Mmp3 expression.
- The miR-376c-3p/Mmp3 signaling pathway is a key mediator of ICA's action.
- These findings may support the clinical application of ICA for osteoporosis treatment.
