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Figure 6 Endogenous C-type natriuretic peptide (CNP) expressions after myocardial infarction (MI). (A) Endogenous CNP mRNA abundance in the infarcted left ventricle (LV), noninfarcted LV, and right ventricle (RV) at different times after MI and on day 3 after sham operation. Values are mean ± SEM. **p < 0.01, *p < 0.05 compared with sham by analysis of variance and Bonferroni's multiple-comparison t test. (B) Immunofluorescent microscopic CNP expression. Upper photomicrographs show the section on day 7 after MI stained by the specific antibody against CNP-53 (left, green) and stained by antifibronectin antibody (right, red). Lower photomicrograph shows the merged image (x600 magnification). GAPDH = glyceraldehydes-3-phosphate dehydrogenase.