MiR-497∼195 cluster regulates angiogenesis during coupling with osteogenesis by maintaining endothelial Notch and HIF-1α activity

Mi Yang, Chang Jun Li, Xi Sun, Qi Guo, Ye Xiao, Tian Su, Man Li Tu, Hui Peng, Qiong Lu, Qing Liu, Hong Bo He, Tie Jian Jiang, Min Xiang Lei, Mei Wan, Xu Cao, Xiang Hang Luo

Research output: Contribution to journalArticlepeer-review

79 Scopus citations

Abstract

A specific bone vessel subtype, strongly positive for CD31 and endomucin (CD31hi Emcnhi), is identified as coupling angiogenesis and osteogenesis. The abundance of type CD31hi Emcnhi vessels decrease during ageing. Here we show that expression of the miR-497∼195 cluster is high in CD31hi Emcnhi endothelium but gradually decreases during ageing. Mice with depletion of miR-497∼195 in endothelial cells show fewer CD31hi Emcnhi vessels and lower bone mass. Conversely, transgenic overexpression of miR-497∼195 in murine endothelium alleviates age-related reduction of type CD31hi Emcnhi vessels and bone loss. miR-497∼195 cluster maintains the endothelial Notch activity and HIF-1α stability via targeting F-box and WD-40 domain protein (Fbxw7) and Prolyl 4-hydroxylase possessing a transmembrane domain (P4HTM) respectively. Notably, endothelialium-specific activation of miR-195 by intravenous injection of aptamer-agomiR-195 stimulates CD31hi Emcnhi vessel and bone formation in aged mice. Together, our study indicates that miR-497∼195 regulates angiogenesis coupled with osteogenesis and may represent a potential therapeutic target for age-related osteoporosis.

Original languageEnglish (US)
Article number16003
JournalNature communications
Volume8
DOIs
StatePublished - Jul 7 2017

ASJC Scopus subject areas

  • General Chemistry
  • General Biochemistry, Genetics and Molecular Biology
  • General Physics and Astronomy

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