<n0:ComplexDefinition xmlns:n0="http://ncicb.nci.nih.gov/xml/owl/EVS/ComplexProperties.xsd#"><n0:def-definition>A formulation in which liposomes are loaded with the cytokine interleukin-2 (IL-2). By activating cytotoxic T-lymphocytes, such as lymphokine-activated killer cells, and increasing levels of the cytotoxic cytokines interferon-gamma (IFN-gamma) and transforming growth factor-beta (TGF-beta), IL-2 may exhibit antitumoral activity. Liposomal formulations of IL-2 may promote entry of the cytokine into target tumor cells and may be used as an immunoadjuvant in cancer vaccine therapy. (NCI04)</n0:def-definition><n0:def-source>NCI</n0:def-source></n0:ComplexDefinition>