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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Effects of three new folate antagonists on human breast adenocarcinoma cells in vitro and on immune responses in vivo.

The effects of three selected potential folate antagonists on 3H-leucine incorporation of eight established breast adenocarcinoma cell lines were investigated. The compounds studied were 5,8-dideazaisofolic acid, 5-methyl-5,8-dideazaisofolic acid, and 10-oxa-5,8-dideazafolic acid. All three anti-folates were inhibitory to most of the cells tested. 10-Oxa-5,8-dideazafolic acid was more effective in inhibiting the growth of these tumor cell lines. Both natural killer cell activity and phytohemagglutinin (PHA)-induced lymphocyte proliferation were decreased in hamsters injected with these compounds, with 5,8-dideazaisofolic acid being the most potent in this regard. The natural killer cell activity and lymphocyte proliferation returned to normal levels 12 days post-injection of these compounds. These studies suggest that 10-oxa-5,8-dideazafolic acid may be useful for the treatment of human breast tumors.[1]


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