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Cancer Lett. 2005 Apr 28;221(2):191-200.

The interferon-inducible 9-27 gene modulates the susceptibility to natural killer cells and the invasiveness of gastric cancer cells.

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Laboratory of Immunology, Korea Research Institute of Bioscience and Biotechnology, Eoun-Dong 52, Yusong, Taejon 305-333, South Korea.


As an effort to identify immune suppressive molecules in gastric cancer cells, a signal sequence trap was employed. Among the genes identified, 9-27 gene was highly expressed in gastric tumor tissues and in cancer cell lines. It was induced by IFN-gamma treatment, but not by TNF-alpha or TGF-beta1 treatment. The overexpression of 9-27 in the gastric cancer cells rendered tumor cells more resistant to natural killer cells. In addition, the 9-27-overexpressed cells showed an increased migration and an invasive capacity when compared with the control cells. Taken together, these data indicate that 9-27 plays a role in malignant progression by suppressing natural killer cells and by increasing the invasive potential of gastric cancer cells.

[Indexed for MEDLINE]

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