Effects of angiotensin converting enzyme inhibitor on the expression of angiotensin converting enzyme 2 in atrium of patients with atrial fibrillation / 中华心血管病杂志
Chinese Journal of Cardiology
;
(12): 625-628, 2007.
Article
Dans Chinois
| WPRIM
| ID: wpr-307233
ABSTRACT
<p><b>OBJECTIVE</b>To investigate the expression of angiotensin converting enzyme 2 (ACE2) and the changes treated with angiotensin converting enzyme inhibitor (ACEI), and its signal transduction pathway.</p><p><b>METHODS</b>Atrial tissues were obtained from 47 patients with RHD undergoing cardiac surgery. The mRNA of ACE2 and ACE were semi-qualified by RT-PCR and normalized to the gene beta-actin. Western blot analysis was employed to examine the expressions of ACE2, ACE, ERK1/2 and phosphorylated ERK (pERK1/2). The atrial tissue angiotensin II (Ang II) content was determined by radioimmunoassay detection.</p><p><b>RESULTS</b>The expression of ACE2 was significantly decreased (P < 0.05), the expression of ACE and pERK1/2 were significantly increased (P < 0.05), and the level of atrial tissue Ang II was significantly increased in patients with chronic atrial fibrillation group (CAF) compared with sinus rhythm group (SR) (P < 0.05). Compared with CAF patients treated without ACEI, the expression of ACE2 significantly increased (P < 0.01), and the relative activity of ERK1/2 significantly decreased (P < 0.05), whereas the expression of ACE and the level of atrial tissue Ang II remained unchanged in CAF patients treated with ACEI.</p><p><b>CONCLUSIONS</b>The study suggested that the dysequilibrium of ACE/ACE2 might play an important role in the process of atrial fibrillation, which may be related to the activation of ERK1/2 pathway. The clinical effect of long-term treatment of ACEI maybe associated with elevated ACE2 expression but not ACE expression.</p>
Texte intégral:
Disponible
Indice:
WPRIM (Pacifique occidental)
Sujet Principal:
Fibrillation auriculaire
/
ARN messager
/
Inhibiteurs de l'enzyme de conversion de l'angiotensine
/
Transduction du signal
/
Peptidyl-Dipeptidase A
/
Mitogen-Activated Protein Kinase 1
/
Utilisations thérapeutiques
/
Mitogen-Activated Protein Kinase 3
/
Traitement médicamenteux
/
Atrium du coeur
Limites du sujet:
Adulte
/
Adulte très âgé
/
Femelle
/
Humains
/
Mâle
langue:
Chinois
Texte intégral:
Chinese Journal of Cardiology
Année:
2007
Type:
Article
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