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Article Publish Status: FREE
Abstract Title:

Flaxseed-derived enterolactone is inversely associated with tumor cell proliferation in men with localized prostate cancer.

Abstract Source:

J Med Food. 2013 Apr ;16(4):357-60. PMID: 23566060

Abstract Author(s):

Maria Azrad, Robin T Vollmer, John Madden, Mark Dewhirst, Thomas J Polascik, Denise C Snyder, Mack T Ruffin, Judd W Moul, Dean E Brenner, Wendy Demark-Wahnefried

Article Affiliation:

Maria Azrad

Abstract:

Enterolactone and enterodiol, mammalian lignans derived from dietary sources such as flaxseed, sesame seeds, kale, broccoli, and apricots, may impede tumor proliferation by inhibiting activation of nuclear factor kappa B (NFκB) and vascular endothelial growth factor (VEGF). We examined the associations between urinary enterolactone and enterodiol with prostatic tumor expression of NFκB, VEGF, and Ki67 among 147 patients with prostate cancer who participated in a presurgical trial of flaxseed supplementation (30 g/day) for ~30 days. Urinary enterolignans and tissue biomarkers were determined by high-performance liquid chromatography and immunohistochemistry, respectively. After supplementation, we observed significant correlations between intakes of plant lignan and urinary concentrations of total enterolignans(ρ=0.677, P<.0001), enterolactone (ρ=0.676, P<.0001), and enterodiol (ρ=0.628, P<.0001). Importantly, we observed that total urinary enterolignans and enterolactone were significantly and inversely correlated with Ki67 in the tumor tissue (ρ=-0.217, P=.011, and ρ=-0.230, P=.007, respectively), and a near-significant inverse association was observed for enterodiol (ρ=-0.159, P=.064). An inverse association was observed between enterolactone and VEGF (ρ=-0.143, P=.141), although this did not reach statistical significance. We did not observe an association between enterolignans and NFκB. In conclusion, flaxseed-derived enterolignans may hinder cancer cell proliferation via VEGF-associated pathways.

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Sayer Ji
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