CSPG4 and myocardial infarction: To investigate the interactions of Cspg4-lineage pericytes with ECs under acute ischemic stress, Cspg4CreER/+ Rosa26tdT/+ and Cspg4CreER/+Rosa26mTmG/+ (pericytes labeled with membrane-tethered GFP) mice underwent experimental MI surgery, and hearts were analyzed 7 days later (Supplemental Figure 4A).