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Journal Article
Research Support, Non-U.S. Gov't
Cancer cell-derived interleukin 1alpha contributes to autocrine and paracrine induction of pro-metastatic genes in breast cancer.
Biochemical and Biophysical Research Communications 2000 August 19
Invasion and metastasis of cancer cells is a complex process requiring the activity of proteins that promote extracellular matrix degradation, motility of cancer cells, and angiogenesis. Although exclusively the cancer cells make several of these proteins, few key proteins are derived from stromal cells in response to cancer cell-stromal cell interaction. In this report, we show that the breast cancer cell-derived interleukin-1alpha (IL-1alpha) plays an important role in expression of pro-metastatic genes in cancer as well as in stromal cells. Neutralizing antibody against IL-1alpha inhibited IL-6, and IL-8 expression in IL-1alpha-expressing cancer cells. In addition, this antibody also prevented induction of IL-6, IL-8, and matrix metalloproteinase 3 (MMP3) but not vascular endothelial growth factor (VEGF) in fibroblasts by conditioned medium (CM) from IL-1alpha-expressing breast cancer cells. These results suggest that inhibition of IL-1alpha activity by either neutralizing antibody against IL-1alpha or chemical inhibitor of IL-1alpha processing may prevent invasion and metastasis of breast cancer.
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