Intracellular and extracellular Cyclophilin a promote cardiac fibrosis through TGF-ß signaling in response to angiotensin â
¡.
Biochem Pharmacol
; 225: 116271, 2024 Jul.
Article
em En
| MEDLINE
| ID: mdl-38723722
ABSTRACT
Cardiac fibrosis is characterized by abnormal proliferation of cardiac fibroblasts (CFs) and ventricular remodeling, which finally leads to heart failure. Inflammation and oxidative stress play a central role in the development of cardiac fibrosis. CyPA (Cyclophilin A) is a main proinflammatory cytokine secreted under the conditions of oxidative stress. The mechanisms by which intracellular and extracellular CyPA interact with CFs are unclear. Male C57BL/6 J mice received angiotensin â
¡ (Ang â
¡) or vehicle for 4 weeks. Inhibition of CyPA significantly reversed Ang â
¡-induced cardiac hypertrophy and fibrosis. Mechanically, TGF-ß (Transforming growth factor-ß) signaling was found to be an indispensable downstream factor of CyPA-mediated myofibroblast differentiation and proliferation. Furthermore, intracellular CyPA and extracellular CyPA activate TGF-ß signaling through NOD-like receptor protein 3 (NLRP3) inflammasome and nicotinamide-adenine dinucleotide phosphate (NADPH) oxidase, respectively. Pharmacological inhibition of CyPA and its receptor CD147 implemented by Triptolide also attenuated the expression of TGF-ß signaling and cardiac fibrosis in Ang â
¡-model. These studies elucidate a novel mechanism by which CyPA promotes TGF-ß and its downstream signaling in CFs and identify CyPA (both intracellular and extracellular) as plausible therapeutic targets for preventing or treating cardiac fibrosis induced by chronic Ang â
¡ stimulation.
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Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Angiotensina II
/
Transdução de Sinais
/
Ciclofilina A
/
Miocárdio
Limite:
Animals
Idioma:
En
Revista:
Biochem Pharmacol
Ano de publicação:
2024
Tipo de documento:
Article
País de afiliação:
China