ArticleScientific reports2025
Knockdown of LncRNA H19 inhibits vascularization and endochondral ossification via the MiRNA-21a-5p-Smad7/p-Smad2/3 pathway in fracture repair.
Article in Scientific reports, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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1 citing paper in PubMed.
- Exercise‑induced exosomal noncoding RNAs: Molecular signaling cascades in bone remodeling and translational applications in sports‑related bone injuries (Review).International journal of molecular medicine · 2026Review
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10 authors.
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Abstract
The biological process of fracture repair involves inflammation, vascularization, endochondral ossification, and cartilage production. Long non-coding RNAs (lncRNAs) are essential for the growth and maintenance of the skeleton. In this study, the role of the long non-coding RNA H19 in endochondral ossification during fracture repair was investigated. We examined H19 expression in the contexts of skeletal development and fracture repair and found that hypertrophic chondrocytes, growing endochondral bone spongiosa, and cortical bone exhibit H19 expression. H19 expression in cortical bone was similar to that in skeletal muscle, suggesting a potential role in bone development regulation. Inhibiting H19 near fractures in a mouse model resulted in disruption of vascularization and delayed endochondral ossification, ultimately leading to delayed fracture union. Importantly, H19 inhibition had no impact on the formation of the cartilaginous callus, indicating its specific role in vascularization and ossification. Further analysis revealed that H19 reduced miR-21a-5p's inhibition of smad7 by functioning as a sponge for miR-21a-5p. H19 silencing led to a decrease in Smad7 expression and a rise in Smad2/3 phosphorylation, and delayed both ossification and vascularization. In conclusion, H19 influences bone remodeling and fracture healing by modulating the miR-21a-5p-smad7-TGFβ-smad2/3 axis, presenting therapeutic potential for fracture repair.
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