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Figure 3 Gene expression levels of interleukin-1ß (IL-1ß) were examined in three mice at each point by real-time quantitative reverse transcription-polymerase chain reaction. A rapid increase in IL-1ß gene expression level, peaking at 6 h, was observed in the infarct-related area, and decreased thereafter. In the noninfarcted area, gene expression levels remained upregulated at 12 weeks after the operation. GADPH = glyceraldehyde-3-phosphate dehydrogenase; h(s) = hour(s); ds = days; w(s) = week(s).