Protein levels myocardial Bcl-2 at 2 and 24 hours after reperfusion (n = 8 at each time point). Bcl-2 levels were detected by immunohistochemical staining. PostC elevated Bcl-2 expression in myocardial (brown staining) at both 2 and 24 hours after reperfusion. AG490 abrogated the up-regulation of Bcl-2 levels by PostC. Wortmannin had no effects on Bcl-2 levels. *p < 0.05 compared with I/R-2 h and I/R-24 h groups respectively; #p < 0.05 compared with PostC-2 h and PostC+wort-2 h groups respectively; $p < 0.05 compared with PostC-2 h and PostC-24 h groups respectively.