Antitumor effects of interferon-omega: in vivo therapy of human tumor xenografts in nude mice.

Abstract

The antitumor effect of the type I IFN, IFN-omega, was evaluated in both in vitro and in vivo studies of human cancer. For these studies, the cDNA for human IFN-omega was cloned into a eukaryotic expression plasmid DNA (pDNA) driven by the cytomegalovirus promoter. Supernatants from UM449 cells transfected in vitro with IFN-omega pDNA had antiproliferative effects on 11 of 13 human tumor cell lines. For in vivo studies, nude mice were implanted s.c. with one of the following human tumors: NIH: OVCAR-3 ovarian carcinoma, A375 melanoma, or A431 epidermoid carcinoma. Direct intratumoral injection of 100 microg of a IFN-omega pDNA DMRIE/DOPE complex (1:1 DNA:DMRIE mass ratio) for 6 consecutive days resulted in a significant reduction in the tumor volume of NIH: OVCAR-3 ovarian carcinoma or A375 melanoma (P = 0.02). IFN-omega pDNA delivered by i.m. injection also had an antitumor effect. Nude mice bearing s.c. A431 epidermoid carcinoma and injected i.m. with 100 microg of IFN-omega pDNA, twice per week for 3 weeks, had a significant reduction in tumor volume (P = 0.009). These results demonstrate for the first time that IFN-omega can have in vivo antitumor effects in several models of human cancer.

• Authors: H M Horton, P Hernandez, S E Parker, K M Barnhart
• Journal: Cancer research (Cancer Res) Vol. 59 Issue 16 Pg. 4064-8 (Aug 15 1999) ISSN: 0008-5472 [Print] United States
• PMID: 10463608 (Publication Type: Journal Article)

Chemical References

• Interferon Type I
• interferon omega 1

Topics

• Animals
• Female
• Humans
• Interferon Type I (administration & dosage, genetics)
• Melanoma (drug therapy, genetics)
• Mice
• Mice, Nude
• Neoplasm Transplantation
• Ovarian Neoplasms (drug therapy, genetics)
• Skin Neoplasms (drug therapy, genetics)
• Transfection
• Transplantation, Heterologous
• Tumor Cells, Cultured