Abstract
Background
Brain metastases occur in 15% to 30% of breast cancer patients, usually as a late event. The patterns of metastases to different organs are determined by the tumor cell phenotype and interactions between the tumor cells and the organ environment.
Methods
We investigated the gene expression profile occurring in brain metastases from a breast cancer cell line. We used cDNA microarrays to compare patterns of gene expression between the mouse breast cancer cell line Jyg MC (A) and a subline that often metastasis to brain, (B).
Results
By Microarray analysis about 350 of 21,000 genes were significantly up-regulated in Jyg MC (B). Many candidate genes that may be associated with the establishment of brain metastasis from breast cancer were included. Interestingly, we found that the expression of astrocyte derived cytokine receptors (IL-6 receptor, TGF-beta receptor and IGF receptor) were significantly increased in Jyg MC (B) cells. These results were confirmed by RT-PCR.
Conclusion
These results suggest that cytokines produced by glial cellsin vivo may contribute, in a paracrine manner, to the development of brain metastases from breast cancer cells.
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Reprint requests to Itaru Nishizuka, Department of Surgery-2, Yokohama City University, School of Medicine, 3–9 Fukuura Kanazawa-ku, Yokohama, Kanagawa 236-0004, Japan.
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Nishizuka, I., Ishikawa, T., Hamaguchi, Y. et al. Analysis of gene expression involved in brain metastasis from breast cancer using cDNA microarray. Breast Cancer 9, 26–32 (2002). https://doi.org/10.1007/BF02967543
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DOI: https://doi.org/10.1007/BF02967543