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ATM deficiency increases α-smooth muscle actin (α-SMA) expression 28 days post-MI. Cross sections of the hearts were immunostained using anti-α-SMA antibodies. Top: α-SMA-stained images from the infarct regions of WT and hKO hearts 28 days post-MI. Bottom: quantitative immunohistochemical analysis of α-SMA expression (*P < 0.05 vs. respective sham; #P < 0.05 vs. respective Non; $P < 0.05 vs. WT-MI Inf; n = 5–7).
