PTPRC and myocardial infarction: In addition, we also prepared a single-cell suspension of heart tissue and then analyzed the proportion of different types of macrophages by flow cytometry; the data showed that (Figure 5) the proportion of M1 macrophages (CD45+Gr-1-CD11b+iNOS+ cells) was the highest on the 3rd day after MI and gradually decreased on the 5th and 7th days after MI, while the proportion of M2 macrophages (CD45+Gr-1-CD11b+Arg+ cells) was the lowest on the 3rd day after MI and gradually increased on the 5th and 7th days after MI.