MiR-15b-5p Regulates Collateral Artery Formation by Targeting AKT3 (Protein Kinase B-3).
Arterioscler Thromb Vasc Biol
; 37(5): 957-968, 2017 05.
Article
em En
| MEDLINE
| ID: mdl-28254819
ABSTRACT
OBJECTIVE:
To identify circulating microRNAs that are differentially expressed in severe coronary heart disease with well or poorly developed collateral arteries and to investigate their mechanisms of action in vivo and in vitro. APPROACH ANDRESULTS:
In our study, we identified a circulating microRNA, miR-15b-5p, with low expression that, nevertheless, characterized patients with sufficient coronary collateral artery function. Moreover, in murine hindlimb ischemia model, in situ hybridization identified that miR-15b-5p was specifically expressed in vascular endothelial cells of adductors in sham group and was remarkably downregulated after femoral artery ligation. Overexpressed miR-15b-5p significantly inhibited arteriogenesis and angiogenesis in mice. In vitro, both under basal and vascular endothelial growth factor stimulation, loss-of-function or gain-of-function studies suggested that miR-15b-5p significantly promoted or depressed the migration and proliferation of endothelial cells. We identified AKT3 (protein kinase B-3) as a direct target of miR-15b-5p. Interestingly, AKT3 deficiency by injection with Chol-AKT3-siRNA obviously suppressed arteriogenesis and the recovery of blood perfusion after femoral ligation in mice.CONCLUSIONS:
These results indicate that circulating miR-15b-5p is a suitable biomarker for discriminating between patients with well-developed or poorly developed collaterals. Moreover, miR-15b-5p is a key regulator of arteriogenesis and angiogenesis, which may represent a potential therapeutic target for ischemic disease.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Doença da Artéria Coronariana
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Circulação Colateral
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Músculo Esquelético
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Circulação Coronária
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Vasos Coronários
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MicroRNAs
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Proteínas Proto-Oncogênicas c-akt
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Isquemia
Tipo de estudo:
Prognostic_studies
Limite:
Animals
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Humans
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Male
Idioma:
En
Revista:
Arterioscler Thromb Vasc Biol
Assunto da revista:
ANGIOLOGIA
Ano de publicação:
2017
Tipo de documento:
Article