Tobacco smoke-induced left ventricular remodelling is not associated with metalloproteinase-2 or -9 activation
| Autor: | Daniella R. Duarte, Álvaro O. Campana, Leonardo A. M. Zornoff, Beatriz Bojikian Matsubara, Luiz Shiguero Matsubara, Paula S. Azevedo, Edson Castardeli, Sergio A. R. Paiva, Marcos F. Minicucci |
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| Rok vydání: | 2007 |
| Předmět: |
Male
Metalloproteinase medicine.medical_specialty Ventricular Remodeling Ventricular function business.industry Ventricular dilatation medicine.disease Statistics Nonparametric Tobacco smoke Rats Ventricular Dysfunction Left Matrix Metalloproteinase 9 Echocardiography Heart failure Internal medicine medicine Cardiology Animals Matrix Metalloproteinase 2 Tobacco Smoke Pollution Rats Wistar Cardiology and Cardiovascular Medicine business |
| Zdroj: | European Journal of Heart Failure. 9:1081-1085 |
| ISSN: | 1388-9842 |
| Popis: | To investigate the role of MMP-2 and MMP-9 in cardiac remodelling induced by tobacco smoke exposure in rats.Rats were allocated into two groups: C (n=9): control animals; ETS (n=9): exposed to tobacco smoke. After 4months, the animals underwent echocardiography, morphometric study and determination of MMP-2 and MMP-9 activity.ETS rats had larger diastolic (C=15.6 +/-1.2 mm/kg, ETS=18.0+/-0.9 mm/kg; p0.001) and systolic (C=7.3+/-1.2 mm/kg, ETS=9.2+/-0.9 mm/kg; p=0.001) ventricular diameters adjusted for body weight. Fractional shortening (C=53+/-4.8%, ETS=48+/- 3.3%; p=0.031) and ejection fraction (C=0.89+/-0.03, ETS=0.86+/-0.02; p=0.030) were smaller in the ETS group. Myocyte cross-sectional area (C=245+/-8 microm2, ETS=253+/-8 microm2; p=0.028) was higher in ETS rats. There were no differences in MMP-2 (C=50+/-14%; ETS=43+/-11%, p=0.228) or MMP-9 (C=0.36+/-0.3%; ETS=0.62+/-0.3%, p=0.630) activity between the groups.MMP-2 and MMP-9 did not participate in the remodelling process induced by tobacco smoke exposure. |
| Databáze: | OpenAIRE |
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