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Fully human anti-interleukin 8 antibody inhibits tumor growth in orthotopic bladder cancer xenografts via down-regulation of matrix metalloproteases and nuclear factor-kappaB.

Authors :
Mian BM
Dinney CP
Bermejo CE
Sweeney P
Tellez C
Yang XD
Gudas JM
McConkey DJ
Bar-Eli M
Source :
Clinical cancer research : an official journal of the American Association for Cancer Research [Clin Cancer Res] 2003 Aug 01; Vol. 9 (8), pp. 3167-75.
Publication Year :
2003

Abstract

Purpose: We previously demonstrated that overexpression of interleukin 8 (IL-8) in human transitional cell carcinoma (TCC) resulted in increased tumorigenicity and metastasis. This increase in tumor growth and metastasis can be attributed to the up-regulation in the expression and activity of the metalloproteinases MMP-2 and MMP-9.<br />Experimental Design: To investigate whether targeting IL-8 with a fully human anti-IL-8 antibody (ABX-IL8) could be a potential therapeutic strategy for controlling TCC growth, we studied its effects on TCC growth in vitro and in an in vivo mouse model. Human TCC cell lines 253J B-V and UM UC3 (high IL-8 producers), 253J (low IL-8), and 253J transfected with the IL-8 gene (high producer) were used.<br />Results: ABX-IL8 had no effect on TCC cell proliferation in vitro. However, in the orthotopic nude mouse model, after 4 weeks of treatment (100 micro g/week, i.p.), a significant decrease in tumor growth of both cell lines was observed. IL-8 blockade by ABX-IL8 significantly inhibited the expression, activity, and transcription of MMP-2 and MMP-9, resulting in decreased invasion through reconstituted basement membrane in vitro. The down-regulation of MMP-2 and MMP-9 in these cells could be explained by the modulation of nuclear factor-kappaB expression and transcriptional activity by ABX-IL8.<br />Conclusions: Our data point to the potential use of ABX-IL8 as a modality to treat bladder cancer and other solid tumors, either alone or in combination with conventional chemotherapy or other antitumor agents.

Details

Language :
English
ISSN :
1078-0432
Volume :
9
Issue :
8
Database :
MEDLINE
Journal :
Clinical cancer research : an official journal of the American Association for Cancer Research
Publication Type :
Academic Journal
Accession number :
12912969