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- Title
Interleukin-4 gene transduced tumor cells promote a potent tumor-specific Th1-type response in cooperation with interferon-atransduction.
- Authors
Eguchi, J.; Hiroishi, K.; Ishii, S.; Baba, T.; Matsumura, T.; Hiraide, A.; Okada, H.; Imawari, M.
- Abstract
To investigate antitumor mechanisms in interleukin (IL)-4 therapy, we established an IL-4-overexpressing MC38 murine colorectal cancer cell line (MC38-IL4). As a therapy against established tumors, MC38-IL4 cells were inoculated contralaterally 7 days after wild-type (MC38-WT) cells had been injected, significantly reducing growth of wild-type tumors (P=0.030). Immunohistochemical analysis showed numerous granulocytes infiltrating wild-type tumors of MC38-IL4-inoculated mice. Injection of MC38-IL4 cells in leukocyte-depleted mice confirmed that granulocytes were involved in IL-4-related primary antitumor effects. Inoculation of MC38-WT in leukocyte-depleted mice initially injected with MC38-IL4 suggested that T cells contributed to the antitumor effects. To investigate tumor-specific responses, we stimulated splenocytes of MC38-immune mice with MC38-IL4 cells in vitro, resulting in MC38-specific lysis (57.5±7.2%, effector to target ratio=20). Treatment of established wild-type tumors with MC38-IL4 in combination with interferon (IFN)-a-overexpressing MC38 cells (MC38-IFNa) significantly reduced the growth of wild-type tumors (P=0.009). In vitro IFN-?production by splenocytes from mice injected with both MC38-IL4 and -IFNawas greatly enhanced in comparison with MC38-IL4 alone, while IL-10 production was not increased. Thus, granulocytes concern early antitumor effects of IL-4 therapy. Subsequently, IL-4 induces long-lasting, tumor-specific immune responses. IL-4 appears to promote a T-helper 1-type antitumor immune response, which is enhanced in cooperation with IFN-a.Gene Therapy (2005) 12, 733-741. doi:10.1038/sj.gt.3302401 Published online 17 March 2005
- Subjects
ANTINEOPLASTIC agents; INTERLEUKIN-4; COLON cancer; CANCER treatment; GRANULOCYTES; INTERFERONS; IMMUNE response; THERAPEUTICS
- Publication
Gene Therapy, 2005, Vol 12, Issue 9, p733
- ISSN
0969-7128
- Publication type
Article
- DOI
10.1038/sj.gt.3302401