Therefore, to better understand the mechanisms used by (Bu2Sn)2TPPS and (Bu3Sn)4TPPS to inhibit the metastatic dissemination of melanoma cells, we analysed the expression of integrin β1 and β3 (Figure 8 and Figure 9), MCAM and ICAM (Figure 10) adhesion receptors in A375 (Figure 8, Figure 10A,C) and HT-144 (Figure 9, Figure 10B,D) cell lines treated for 24 h, 48 h and 72 h with 250 and 200 nM of (Bu2Sn)2TPPS, respectively, and with 80 and 60 nM of (Bu3Sn)4TPPS, respectively. This evidence concerns the gene MCAM and melanoma.