Medical News Observer

• The study examines the influence of flaxseed lignans and alpha-linolenic acid on the human gut microbiome and its connection to breast health.
• Researchers found that a flaxseed-rich diet changes the gut microbiota-mammary gland miRNA interaction, potentially lowering breast cancer risk.
• This research underscores the importance of dietary choices, particularly flaxseed, in breast cancer prevention and managing gut microbiome and miRNA relationships.

This study, published in the Microbiology Spectrum journal, explores the connection between the human gut microbiome and breast health. Researchers focused on the influence of flaxseed components called lignans on this relationship. Flaxseed (FS) is known to contain lignan secoisolariciresinol diglucoside (SDG) and alpha-linolenic acid (ALA). Lignans requires microbial processing to release bioactive metabolites, unlike alpha-linolenic acid, and both have antitumor effects. 

This study investigated the relationship between gut microbiota and mammary gland microRNAs (miRNAs) in female mice, exploring their link to breast cancer risk. Researchers examined the effects of a flaxseed (FS) diet, rich in lignan and alpha-linolenic acid, on these miRNAs. They discovered that flaxseed (FS) diet alters the gut microbiota-mammary gland miRNA relationship, steering it toward a cancer-resistant state.

This study highlights the potential of dietary interventions, specifically flaxseed, in modulating these relationships and suggests a novel preventative approach against breast cancer.

Ref: Wu Diana, Thompson Lilian U., and Comelli Elena M. 2023. “Cecal Microbiota and Mammary Gland microRNA Signatures Are Related and Modifiable by Dietary Flaxseed with Implications for Breast Cancer Risk.” Microbiology Spectrum 0 (0): e02290-23. https://doi.org/10.1128/spectrum.02290-23