CD300A and myocardial infarction: Notably, we also found that the SiglecFhi neutrophil population was smaller, and the SiglecFlo neutrophil population was larger, in Cd300afl/flLyz2-Cre mice than in Cd300afl/fl mice in the kidney 14 days after biIRI (Supplemental Figure 4M), suggesting a functional role of CD300a on neutrophils in the kidney after biIRI that is similar to that observed in the heart after MI/R.