Abstract
Anionic, cationic, and neutral liposomes were constructed to contain IL-2 in order to evaluate their affinity to a cervical cancer cell line (INBL) and to determine whether they can present IL-2 on their external surface. When these liposomes were co-cultured with INBL, the anionic liposomes were the only ones found to be cytotoxic. When neutral and cationic liposomes were constructed in the presence of IL-2, IL-2 was detected only on the surface of cationic liposomes by using a fluorescent anti-IL-2 antibody. By co-culturing INBL with IL-2-containing cationic liposomes, and by using fluorescent anti-IL-2 antibody, we found a strong IL-2 presence on the cell membranes thus suggesting a high affinity of the liposomes to the INBL cells.
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