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Article Publish Status: FREE
Abstract Title:

Inhibition of Tumor Growth by Dietary Indole-3-Carbinol in a Prostate Cancer Xenograft Model May Be Associated with Disrupted Gut Microbial Interactions.

Abstract Source:

Nutrients. 2019 Feb 22 ;11(2). Epub 2019 Feb 22. PMID: 30813350

Abstract Author(s):

Yanbei Wu, Robert W Li, Haiqiu Huang, Arnetta Fletcher, Lu Yu, Quynhchi Pham, Liangli Yu, Qiang He, Thomas T Y Wang

Article Affiliation:

Yanbei Wu

Abstract:

Accumulated evidence suggests that the cruciferous vegetables-derived compound indole-3-carbinol (I3C) may protect against prostate cancer, but the precise mechanisms underlying its action remain unclear. This study aimed to verify the hypothesis that the beneficial effect of dietary I3C may be due to its modulatory effect on the gut microbiome of mice. Athymic nude mice (5⁻7 weeks old, male, Balb c/c nu/nu) with established tumor xenografts were fed a basal diet (AIN-93) with or without 1 µmoles I3C/g for 9 weeks. The effects of dietary I3C on gut microbial composition and microbial species interactions were then examined by 16s rRNA gene-based sequencing and co-occurrence network analysis. I3C supplementation significantly inhibited tumor growth (<0.0001) and altered the structure of gut microbiome. The abundance of the phylum Deferribacteres, more specifically,, was significantly increased by dietary I3C. Additionally, I3C consumption also changed gut microbial co-occurrence patterns. One of the network modules in the control group, consisting of seven bacteria in family S-27, was positively correlated with tumor size (<0.009). Moreover, dietary I3C disrupted microbial interactions and altered this association between specific microbial network and tumor development. Our results unraveled complex relationships among I3C ingestion, gut microbiota, and prostate tumor development and may provide a novel insight into the mechanism for the chemopreventive effect of dietary I3C on prostate cancer.

Study Type : Animal Study

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Sayer Ji
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