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Antioxidant treatment prevents cardiac protein oxidation after ischemia-reperfusion and improves myocardial function and coronary perfusion in senescent hearts

100%

Besse S., Bulteau A. L., Boucher F., Riou B., Swynghedauw B., De Leiris J.

Journal of Physiology and Pharmacology

2006

tom 57

nr 4

Cardiovascular ageing is associated with an increase in cardiac susceptibility to ischaemia and reperfusion and production of reactive oxygen species has been suspected to be responsible for this age-associated particular vulnerability. To determine whether administration of antioxidant treatment could afford some protection against ischaemia and reperfusion during aging, isolated perfused hearts from adult and senescent rats were submitted to normoxia (180 min), prolonged low-flow ischaemia (15% of initial coronary flow;180 min) or low-flow ischaemia/reperfusion (45 min/30 min), without or with antioxidant enzymes (superoxide dismutase+catalase; 50IU/ml). Contractile function and coronary perfusion were measured and protein oxidation was quantitated in left ventricle after normoxia, ischaemia and ischaemia/reperfusion. Protein oxidation was higher in senescent than in adult hearts after ischaemia-reperfusion, in contrast to prolonged ischaemia. During prolonged ischaemia, antioxidant treatment prevented coronary vasoconstriction at both ages and delayed contractile dysfunction in senescent hearts but did not limit protein oxidation. During reperfusion, antioxidant treatment prevented coronary vasoconstriction and protein oxidation at both ages and considerably improved recovery of contractile function in senescent hearts. In conclusion, antioxidant treatment fully protects the senescent heart against ischaemia/reperfusion but not against prolonged ischaemia injury, indicating that oxidative stress plays a central role in the age-associated vulnerability to ischaemia-reperfusion.

Intramyocardial protein therapy with vascular endothelial growth factor (VEGF-165) induces functional angiogenesis in rat senescent myocardium

84%

Besse S., Boucher F., Linguet G., Riou L., De Leiris J., Riou B., Dimastromatteo J., Comte R., Courty J., Delbe J.

Journal of Physiology and Pharmacology

2010

tom 61

nr 6

Ograniczanie wyników

2 Journal of Physiology and Pharmacology

2 Besse S.

2 Boucher F.

2 De Leiris J.

2 Riou B.

1 Bulteau A. L.

1 Comte R.

1 Courty J.

1 Delbe J.

1 Dimastromatteo J.

1 Linguet G.

1 Riou L.

1 Swynghedauw B.

1 2010

1 2006

Wyniki wyszukiwania

Antioxidant treatment prevents cardiac protein oxidation after ischemia-reperfusion and improves myocardial function and coronary perfusion in senescent hearts

Intramyocardial protein therapy with vascular endothelial growth factor (VEGF-165) induces functional angiogenesis in rat senescent myocardium