Smaller percentages of Fos-IR cells were present in DCM (25 ± 10.2% in L6, 22 ± 6.6% in S1), MDH (8 ± 5.2% in L6, 9 ± 2% in S1) and LDH (9 ± 3.7% in L6, 9 ± 1.7% in S1) (Fig. 6B). This evidence concerns the gene FOS and familial dilated cardiomyopathy.