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FIGURE 3. (A) In vitro labeling stability (n = 3) of 400-nm 186Re-(NH4)2SO4 liposomes labeled with 186Re-BMEDA and with 186Re-BMEDA + BT in 50% FBS-PBS buffer, pH 7.4, at 37°C. (B) In vitro labeling stability (n = 3) of 400-nm 186Re-cysteine liposomes labeled with 186Re-BMEDA and with 186Re-BMEDA + BT in 50% FBS-PBS buffer at 37°C. 186Re-(NH4)2SO4 liposomes labeled with 186Re-BMEDA had the best in vitro labeling stability of the liposomes tested. This stability could be retained for 96 h in 50% FBS-PBS buffer at 37°C (*P < 0.05).
