SDF1 (CXCL-12) is a CXC chemokine and is expressed in a variety of tissues where it acts as a potent chemoattractant for hematopoetic cells.[1,2,3] SDF1 is involved in homing of hematopoietic stem cells to the bone marrow and controlling human- and murine progenitor cell proliferation- and survival.[4,5,6] SDF1 creates a stem cell-attracting environment which possibly results in organ- and tissue repair.[7] Several experimental studies have shown, that high SDF1 levels in ischemic myocardium lead to myocardial protection and improved function after myocardial infarction in vivo.[8,9]. Here, CXCL12 is linked to myocardial infarction.