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- W2024531812 abstract "Phenoxodiol (PXD) is a synthetic analogue of the plant isoflavone genistein with improved anticancer efficacy. Various properties and mechanisms of action have been attributed to the drug, the most important being its ability to sensitize resistant tumour cells to chemotherapy, which led to its fast track FDA approval for phase II/III clinical trials. In this study, we examined the effects of PXD on human peripheral blood mononuclear cells (PBMC) and its potential role in regulating immune responses. We show that PXD, at concentrations ≥1 μg/ml (4 μM), inhibited proliferation and reduced the viability of healthy donor-derived PBMC. In contrast, lower PXD concentrations (0.05–0.5 μg/ml) augmented, upon 3-day incubation, PBMC cytotoxicity. Experiments with purified CD56+ lymphocytes revealed that PXD enhanced the lytic function of natural killer (NK) cells by directly stimulating this lymphocytic subpopulation. Furthermore, in an in vivo colon cancer model, Balb/C mice administered low-dose PXD, exhibited significantly reduced tumour growth rates and prolonged survival (in 40% of the animals). Ex vivo results showed that PXD stimulated both NK and tumour-specific cell lytic activity. We conclude that PXD, when administered at low concentrations, can act as an immunomodulator, enhancing impaired immune responses, often seen in cancer-bearing individuals." @default.
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- W2024531812 date "2009-02-11" @default.
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- W2024531812 title "Phenoxodiol, an anticancer isoflavene, induces immunomodulatory effects in vitro and in vivo" @default.
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- W2024531812 doi "https://doi.org/10.1111/j.1582-4934.2009.00695.x" @default.
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