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- W2099361104 abstract "Abstract We have previously shown that talactoferrin-alfa (TLF), a recombinant human lactoferrin, is an immunomodulatory protein that is active against implanted tumors, both as a single agent and in combination with chemotherapy. In this study, we show that talactoferrin is active against autochthonous tumors in a transgenic mouse line, which is more analogous to human cancers, and identify key mechanistic steps involved in the anticancer activity of oral TLF. BALB/c mice transgenic for the rat neu (ErbB2) oncogene (BALB-neuT) treated with oral TLF showed a significant delay in carcinogenesis, with 60% tumor protection relative to vehicle-treated mice at week 21. Oral TLF also showed tumor growth inhibition in wild-type BALB/c mice implanted with neu+ mammary adenocarcinoma, with one third displaying a long-lasting or complete response. Oral TLF induces an increase in intestinal mucosal IFN-γ production and an increase in Peyer's patch cellularity, including expansion of CD8+ T lymphocytes and NKT cells, and the enhancement of CD8+ T-cell cytotoxicity. In IFN-γ knockout mice, there is an absence of the TLF-induced Peyer's patch cellularity, no expansion of CD8+ T lymphocytes and NKT cells, and loss of TLF anticancer activity. TLF antitumor activity is also lost in mice depleted of CD8+ T cells and in CD1 knockout mice, which lack NKT activity. Thus, the inhibition of distant tumors by oral TLF seems to be mediated by an IFN-γ–dependent enhancement of CD8+ T- and NKT cell activity initiated within the intestinal mucosa. [Cancer Res 2007;67(13):6425–32]" @default.
- W2099361104 created "2016-06-24" @default.
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- W2099361104 date "2007-07-01" @default.
- W2099361104 modified "2023-09-26" @default.
- W2099361104 title "Requirement for IFN-γ, CD8+ T Lymphocytes, and NKT Cells in Talactoferrin-Induced Inhibition of neu+ Tumors" @default.
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- W2099361104 doi "https://doi.org/10.1158/0008-5472.can-06-4080" @default.
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