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. 1999 Oct;81(4):647–653. doi: 10.1038/sj.bjc.6690742

Transfection of interleukin-8 increases angiogenesis and tumorigenesis of human gastric carcinoma cells in nude mice

Y Kitadai 1,2, Y Takahashi 3, K Haruma 1, K Naka 2, K Sumii 1, H Yokozaki 2, W Yasui 2, N Mukaida 4, Y Ohmoto 5, G Kajiyama 1, I J Fidler 6, E Tahara 2
PMCID: PMC2362886  PMID: 10574250

Abstract

The growth and spread of tumour cells depends on adequate vasculature. We have previously reported that the expression of interleukin-8 (IL-8) directly correlates with the vascularity of human gastric carcinomas. To provide evidence for a causal role of IL-8 in angiogenesis and tumorigenicity of human gastric cancer, we used the lipofectin method to stably transfect the human TMK-1 gastric carcinoma cells (low endogenous IL-8) with an IL-8 expression vector or control vector. Transfection with IL-8 did not affect the proliferation of cultured cells, yet the culture supernatants of the transfected (but not control) cells stimulated proliferation of human umbilical vein endothelial cells. The IL-8-transfected and control cells were injected into the gastric wall of nude mice. IL-8-transfected cells produced rapidly growing, highly vascular neoplasms as compared to control cells. These results provide direct evidence for the role of IL-8 in the angiogenesis and tumorigenicity of human gastric carcinomas. © 1999 Cancer Research Campaign

Keywords: interleukin-8, angiogenesis, gastric carcinoma, transfection

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Selected References

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