As shown, the expression of azurin does not impact the homing ability of these cells, and these results are supported by the characterization of CXCR4 (Supplementary Material 2), a known chemokine receptor associated with the tumor tropism properties of MSC (21.2% expression in control MSC versus 23.2% expression in hazu-MSC, assessed by flow cytometry). Here, CXCR4 is linked to neoplasm.