Cationic lipid gene transfer of an IL-2 transgene leads to activation of natural killer cells in a SCID mouse human tumor xenograft.
|
| Abstract |
Natural killer (NK) cells play an important role in combating infectious and malignant diseases and interleukin-2 (IL-2) has been shown to promote proliferation and activation of NK cells in vitro and in vivo. Here we investigate the effects of local cationic lipid-mediated IL-2 gene transfer on intratumoral accumulation and activation of NK cells in a SCID mouse tumor model. UM449 human melanoma tumors in SCID mice received intratumoral injections of DMRIE/DOPE admixed with VR1103, a DNA plasmid encoding the gene for human IL-2. Dissagregated tumor cells were tested for IL-2 secretion and were characterized using antibodies to asGM1, MAC-1, and F4/80 antigens. Granzyme A, a proteolytic serine esterase, was also measured in tumor cell lysates. IL-2 secretion from tumors injected with VR1103:DMRIE/DOPE peaked at 48 h after injection and fell to baseline levels on day 8. Intratumoral granzyme A activity was significantly increased in tumors injected with IL-2 plasmid:DMRIE/DOPE complexes, but not by an irrelevant plasmid DNA:DMRIE/DOPE control. Importantly, the growth of UM449 tumors was slowed in VR1103:DMRIE/DOPE-injected tumors. These results indicate that local cationic lipid-mediated gene transfer of IL-2 induces activation of intratumoral NK cells and slows tumor growth.
|
|---|---|
| Authors | P R Clark, A T Stopeck, S E Parker, E M Hersh |
| Journal | Cellular immunology (Cell Immunol) Vol. 204 Issue 2 Pg. 96-104 (Sep 15 2000) ISSN: 0008-8749 [Print] Netherlands |
| PMID | 11069717 (Publication Type: Journal Article) |
| Copyright | Copyright 2000 Academic Press. |
| Chemical References |
|
| Topics |
|
Join CureHunter, for free Research Interface BASIC access!
Realize the full power of the drug-disease research graph!