CCR2 inhibition and CCR2KO BMT reduce leukocyte infiltration into the heart following MI. (A) Representative CD68, tryptase, and MPO staining for the remote zone of hearts from WT C57BL/6 mice that underwent MI surgery followed by administration (i.p.) of 2 mg⋅kg−1⋅d−1 of a CCR2 antagonist or vehicle for 4 d or WT C57BL/6 mice receiving WT, β2ARKO, or CCR2KO BMT animals that underwent MI surgery. (B–D) Quantification of CD68 (B), tryptase (C), and MPO (D) staining for the remote zone of 4-d post-MI hearts from Veh- and CCR2 antagonist-treated mice or WT, β2ARKO, and CCR2KO BMT animals. n = 4–8. Data are expressed as mean ± SEM.