miR-143 promotes angiogenesis and osteoblast differentiation by targeting HDAC7

Area of Science:

• Biomedical research
• Molecular biology
• Vascular biology

Background:

• Bone formation regulation is complex and not fully understood.
• MicroRNAs are increasingly recognized for their roles in biological processes.
• A specific endothelium subtype (CD31hiEMCNhi) promotes bone formation and osteoblast development.

Purpose of the Study:

• To investigate the role of microRNA-143 (miR-143) in CD31hiEMCNhi endothelium generation.
• To determine the function of miR-143 in bone formation and angiogenesis.
• To elucidate the molecular mechanism by which miR-143 influences these processes.

Main Methods:

• Expression analysis of miR-143 in osteoblasts and CD31hiEMCNhi endothelial cells.
• Correlation analysis of serum miR-143 levels with age in humans.
• In vivo studies using miR-143 overexpression and knockout mouse models.
• Mechanistic studies involving target gene identification (HDAC7) and knockdown experiments.

Main Results:

• miR-143 is expressed in osteoblasts and CD31hiEMCNhi endothelial cells.
• Serum miR-143 levels decrease with age in humans.
• Overexpression of miR-143 enhances osteoblast formation and angiogenesis.
• miR-143 deficiency in mice impairs CD31hiEMCNhi vessel and osteoblast formation.
• miR-143 directly targets HDAC7, and its knockdown rescues miR-143 deficiency phenotypes.

Conclusions:

• miR-143 promotes angiogenesis coupled with osteoblast differentiation.
• The mechanism involves targeting HDAC7.
• miR-143 represents a potential therapeutic target for angiogenic and osteogenic diseases.