Effects of Uric Acid on the NO Production of HUVECs and its Restoration by Urate Lowering Agents.
Drug Res (Stuttg)
; 66(5): 270-4, 2016 May.
Article
em En
| MEDLINE
| ID: mdl-26909689
ABSTRACT
BACKGROUND:
Although urate impaired the endothelial function, its underlying mechanism remains unknown. We hypothesized that urate impaired nitric oxide (NO) production in human umbilical vein endothelial cells (HUVECs) via activation of uric acid transporters (UATs). PURPOSE ANDMETHOD:
In the present study, we studied effects of urate on NO production and eNOS protein expression in HUVEC cells in the presence and absence of urate lowering agents using molecular biological and biochemical assays.RESULTS:
HUVECs expressed the 4 kinds of UATs, URATv1, ABCG2, MRP4 and MCT9. Exposure to urate at 7 mg/dl for 24 h significantly reduced production of NO. Pretreatment with benzbromarone, losartan or irbesartan normalized NO production. The same exposure resulted in dephosphorylation of endothelial NO synthase (eNOS) in HUVECs. Again pretreatment with benzbromarone, losartan or irbesartan abolished this effect.CONCLUSION:
Urate reduced NO production by impaired phosphorylation of eNOS in HUVEC via activation of UATs, which could be normalized by urate lowering agents.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Ácido Úrico
/
Uricosúricos
/
Óxido Nítrico Sintase Tipo III
/
Células Endoteliais da Veia Umbilical Humana
/
Óxido Nítrico
Limite:
Humans
Idioma:
En
Revista:
Drug Res (Stuttg)
Ano de publicação:
2016
Tipo de documento:
Article
País de afiliação:
Japão