CXCL12 and infarction: The plasma level of SDF-1α significantly increased 3 days post infarction in the IP group as compared to control AMI group (IP: 45.29± 11.31 vs. control: 27.00±15.43pg/ml; P=0.037), with normalization at the 1-month FUP (IP: 28.87± 3.81 vs. control: 26.91± 20.24pg/ml; P=0.85) (Figure 3A).