Effects of pravastatin on myocardial connexin 43, IFN-gamma and IL-10 expressions in a murine model of viral myocarditis induced by Coxsackievirus B3 / 中华心血管病杂志
Chinese Journal of Cardiology
;
(12): 72-76, 2008.
Article
Dans Chinois
| WPRIM
| ID: wpr-299495
ABSTRACT
<p><b>OBJECTIVE</b>To observe the effects of pravastatin on myocardial connexin 43 (Cx43), IFN-gamma and IL-10 expressions in a murine model of viral myocarditis (VMC) induced by Coxsackievirus B3.</p><p><b>METHODS</b>Four-week-old male Balb/c mice were inoculated intraperitoneally with Coxsackievirus B3 and then randomly received saline (group A, n = 12), low dose pravastatin (40 mg.kg(-1).d(-1), group B, n = 12) and high dose pravastatin (80 mg.kg(-1).d(-1), group C, n = 12) for 14 days. Another group of mice were injected with Eagle's solution and treated with saline (group D, n = 12) or high dose pravastatin (80 mg.kg(-1).d(-1), group E, n = 12). After 14 days treatments, serum IFN-gamma, IL-10 were assayed using ELISA, myocardium IFN-gamma, IL-10 and Cx43 mRNA levels were measured by real-time PCR, myocardium expression of Cx43 was also determined by immunohistochemistry staining method on cardiac myocytes.</p><p><b>RESULTS</b>Pravastatin dose-dependently upregulated Cx43 proteins on membrane of myocardial cells (group A 0.16 +/- 0.06, group B 4.55 +/- 0.73 and group C 5.21 +/- 0.42, P < 0.01 vs. group A) and Cx43 mRNA expression (group A 1.000 +/- 0.127, group B 1.320 +/- 0.096, group C 1.550 +/- 0.126, P < 0.05 vs. group A), IL-10 mRNA expression (group A 1.000 +/- 0.031, group B 1.810 +/- 0.029, group C 2.140 +/- 0.032, P < 0.05 vs. group A) while down-regulated IFN-gamma mRNA (group A 1.000 +/- 0.061, group B 0.603 +/- 0.063, group C 0.333 +/- 0.071, P < 0.01 vs. group A). Serum IFN-gamma, IL-10 concentrations changed in the same direction as myocardial mRNA levels of IFN-gamma, IL-10 post pravastatin treatments.</p><p><b>CONCLUSION</b>Pravastatin treatments upregulated expressions of Cx43 at mRNA and protein levels and improved the INF-gamma/IL-10 balance which might be the working mechanisms for pravastatin-mediated anti-VMC and anti-arrhythmia effects in this VMC model.</p>
Texte intégral:
Disponible
Indice:
WPRIM (Pacifique occidental)
Sujet Principal:
Virologie
/
Interféron gamma
/
Pravastatine
/
Interleukine-10
/
Connexine 43
/
Infections à virus coxsackie
/
Utilisations thérapeutiques
/
Modèles animaux de maladie humaine
/
Traitement médicamenteux
/
Métabolisme
Type d'étude:
Étude pronostique
Limites du sujet:
Animaux
langue:
Chinois
Texte intégral:
Chinese Journal of Cardiology
Année:
2008
Type:
Article
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