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Objective To assess the effects of exogenous AAV9 Cyclin-A2 in vivo post MI.Methods Forty-eight male Sprague Dawley rat were randomly divided into four groups: MI+PBS (n =12); MI+AAV9 Cyclin-A2 (n =12); MI+HA (n =12); MI+HA+AAV-9 Cyclin-A2 (n =12).The recombinant was constructed, and 2 x 1011 genome copies constructs were injected into the infarcted myocardium at three different points.