Epigallocatechingallate attenuates myocardial injury in a mouse model of heart failure through TGFß1/Smad3 signaling pathway.
Mol Med Rep
; 17(6): 7652-7660, 2018 Jun.
Article
en En
| MEDLINE
| ID: mdl-29620209
ABSTRACT
The present study aimed to assess the protective effect of epigallocatechingallate (EGCG) against myocardial injury in a mouse model of heart failure and to determine the mechanism underlying regulation of the transforming growth factorß1/mothers against decapentaplegic homolog 3 (TGFß1/Smad3) signaling pathway. Mouse models of heart failure were established. Alterations in ejection fraction, left ventricular internal diastolic diameter (LVIDd) and left ventricular internal systolic diameter (LVIDs) were measured by echocardiography. Pathological alterations of myocardial tissue were determined by hematoxylin and eosin, and Masson staining. The levels of serum brain natriuretic peptide (BNP), NterminalproBNP, interleukin (IL)1ß, IL6, tumor necrosis factorα, malondialdehyde, superoxide dismutase and glutathione peroxidase were detected with ELISA. Expression of collagen I, collagen III were detected by western blotting and reverse transcription quantitative polymerase chain reaction. Transforming growth factorß1 (TGFß1), Smad3, phosphorylated (p)Smad3, apoptosis regulator BAX (Bax), caspase3 and apoptosis regulator Bcl2 in mouse cardiac tissue were measured by western blotting. Psmad3 and TGFß1 were measured by immunofluorescence staining. EGCG reversed the alterations in LVIDd and LVIDs induced by establishment of the model of heart failure, increased ejection fraction, inhibited myocardial fibrosis, attenuated the oxidative stress, inflammatory and cardiomyocyte apoptosis and lowered the expression levels of collagen I and collagen III. Following treatment with TGFß1 inhibitor, the protective effect of EGCG against heart failure was attenuated. The results of the present study demonstrated that EGCG can inhibit the progression and development of heart failure in mice through inhibition of myocardial fibrosis and reduction of ventricular collagen remodeling. This protective effect of EGCG is likely mediated through inhibition of TGFß1/smad3 signaling pathway.
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Transducción de Señal
/
Catequina
/
Proteína smad3
/
Factor de Crecimiento Transformador beta1
/
Insuficiencia Cardíaca
/
Miocardio
Tipo de estudio:
Diagnostic_studies
/
Etiology_studies
/
Prognostic_studies
Límite:
Animals
Idioma:
En
Revista:
Mol Med Rep
Año:
2018
Tipo del documento:
Article