| Texto completo | |
| Autor(es): |
Cau, Stefany B.
[1, 2]
;
Bruder-Nascimento, Ariane
[3, 4]
;
Silva, Marcondes B.
[1]
;
Ramalho, Fernanda N. Z.
[1]
;
Mestriner, Fabiola
[1]
;
Alves-Lopes, Rheure
[1]
;
Ferreira, Nathanne
[1]
;
Tostes, Rita C.
[1]
;
Bruder-Nascimento, Thiago
[1, 3, 4, 5]
Número total de Autores: 9
|
| Afiliação do(s) autor(es): | [1] Univ Sao Paulo, Ribeirao Preto Med Sch, Dept Pharmacol, Sao Paulo - Brazil
[2] Univ Fed Minas Gerais, Inst Biol Sci, Dept Pharmacol, Belo Horizonte, MG - Brazil
[3] Univ Pittsburgh, Dept Pediat, Pittsburgh, PA 15224 - USA
[4] Univ Pittsburgh, Ctr Pediat Res Obes & Metab CPROM, Pittsburgh, PA 15224 - USA
[5] Univ Pittsburgh, Vasc Med Inst VMI, Pittsburgh, PA 15224 - USA
Número total de Afiliações: 5
|
| Tipo de documento: | Artigo Científico |
| Fonte: | VASCULAR PHARMACOLOGY; v. 139, AUG 2021. |
| Citações Web of Science: | 0 |
| Resumo | |
Angiotensin-II (Ang-II), a major target for treatment of cardiovascular disease, promotes cardiovascular dysfunction by directly modulating structure and function of vascular cells. Inflammasome components are expressed in the vasculature and are activated by specific stimuli. However, whether Ang-II activates the inflammasome in vascular cells or inflammasome activation contributes to Ang-II-induced vascular damage is still not fully elucidated. We tested the hypothesis that Ang-II induces endothelial dysfunction, vascular remodeling, and high blood pressure via inflammasome activation. C57BL6/J wild type (WT) and Caspase-1 knockout (Casp1-/-) mice were infused with vehicle or Ang-II for two weeks (490 ng/Kg/day) to determine whether the inflammasome contributes to vascular damage induced by Ang-II. Rat Aortic Vascular Smooth Muscle cells (RASMC) were used to determine if the interaction between Ang-II and inflammasomes causes migration and proliferation of vascular smooth muscle cells. Ex vivo studies revealed that Ang-II infusion induced vascular oxidative stress, endothelial dysfunction and vascular remodeling in WT mice. Casp1-/- mice were protected against Ang-II-induced vascular injury. In vitro experiments, Ang-II activated the NLRP3 inflammasome in RASMC, i.e. Ang-II increased Caspase-1 (Casp1) activity and cleavage of pro-interleukin (IL)-1 beta. MCC950 (NLRP3 receptor antagonist) prevented Ang-II-induced vascular migration and proliferation, but failed to reduce reactive oxygen species production. In conclusion, Ang-II leads to inflammasome activation in the vasculature contributing to endothelial dysfunction and vascular remodeling. Taken together, we place inflammasomes as a possible therapeutic target in conditions associated with increased Ang-II levels. (AU) | |
| Processo FAPESP: | 11/12604-2 - Envolvimento da sinalização por receptores do tipo NOD no controle do tônus vascular fisiológico e fisiopatológico durante a hipertensão experimental |
| Beneficiário: | Stêfany Bruno de Assis Cau |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |