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The Runx2 switch: unlocking osteoblast-related disorders through signaling pathways and non-coding RNAs
Somayeh Aslani1, Ashkan Kalantary-Charvadeh1, Roghayeh Abbasalipourkabir1
1Department of Clinical Biochemistry, School of Medicine, Hamadan University of Medical Sciences, Hamadan, Iran.
Experimental Cell Research
|February 1, 2026
Summary
Runt-related transcription factor 2 (Runx2) is crucial for bone formation. This review explores how signaling pathways and non-coding RNAs regulate Runx2, offering insights into treating bone disorders.
Area of Science:
- Biochemistry
- Molecular Biology
- Cell Biology
Background:
- Osteoblasts, derived from mesenchymal stem cells (MSCs), are vital for bone formation.
- Dysregulation of osteoblast differentiation contributes to bone-related disorders.
- Runt-related transcription factor 2 (Runx2) is a master regulator of osteoblast differentiation.
Purpose of the Study:
- To review the regulatory mechanisms governing Runx2 expression and function during osteoblast differentiation.
- To explore the interplay between signaling pathways, non-coding RNAs, and Runx2 in osteogenesis.
- To highlight the therapeutic potential of targeting these regulatory networks for bone disorders.
Main Methods:
- Literature review focusing on molecular mechanisms of osteoblast differentiation.
- Analysis of signaling pathways, transcription factors, and non-coding RNA networks.
- Integration of data on competing endogenous RNA (ceRNA) interactions involving Runx2.
Main Results:
- Runx2 expression and activity are tightly controlled by signaling pathways and a complex post-transcriptional ceRNA network.
- Long non-coding RNAs (lncRNAs) and circular RNAs (circRNAs) act as sponges for microRNAs (miRNAs), modulating Runx2 levels.
- Signaling pathways influence Runx2 indirectly by regulating osteo-regulatory miRNAs.
Conclusions:
- Runx2 is a central node in osteoblast differentiation, regulated by intricate molecular interactions.
- Understanding the ceRNA network and signaling pathways offers novel therapeutic strategies for bone diseases.
- Targeting Runx2-associated regulatory elements holds promise for regenerative medicine in bone repair.
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