Anti-Inflammatory Mechanisms of Soy-Derived Compounds in Intestinal Health

Bioactive constituents of soybean, notably isoflavones, phytosterols and protease inhibitors, exert a multifaceted attenuation of intestinal inflammation. Central to their action is the modulation of innate immune signalling pathways, including inhibition of the TLR4–NF-κB axis, leading to reduced transcription of pro-inflammatory cytokines such as TNF-α, IL-1β and IL-6. Concurrently, soy-derived agents promote macrophage polarisation towards an anti-inflammatory M2 phenotype, dampening mucosal immune activation. At the epithelial interface, these compounds enhance barrier integrity by upregulating tight junction proteins and mucin secretion, thereby limiting translocation of luminal antigens. A third axis involves reshaping the gut microbiota; soy isoflavones serve as substrates for commensal bacteria, fostering production of short-chain fatty acids, especially butyrate, which in turn support epithelial health and regulatory T-cell induction. Collectively, these convergent mechanisms underpin the therapeutic potential of soy-based diets and supplements in the prevention and management of inflammatory bowel disease, metabolic disorders and diet-related dysbiosis.

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Anti-Inflammatory Mechanisms of Soy-Derived Compounds in Intestinal Health publication trend

The graph below shows the total number of articles in anti-inflammatory mechanisms of soy-derived compounds in intestinal health across all publications each year (not limited to Nature Index journals).

Technical terms

Isoflavones: Polyphenolic compounds in soy that mimic oestrogen and modulate immune and epithelial cell functions.

TLR4–NF-κB signalling: A receptor–transcription factor cascade that drives expression of inflammatory genes in response to bacterial lipopolysaccharide.

Macrophage polarisation: Differentiation of macrophages into a pro-inflammatory M1 or an anti-inflammatory M2 phenotype.

Intestinal barrier integrity: The cohesive function of epithelial cells, tight junctions and mucus layers that prevents luminal antigen translocation.

Gut microbiota: The community of microorganisms in the gastrointestinal tract that influences host immunity and metabolism.

References

1. Genistein induces macrophage polarization and systemic cytokine to ameliorate experimental colitis. PLOS ONE (2018).
2. Regulation of Intestinal Inflammation by Soybean and Soy-Derived Compounds. Foods (2021).
3. Soybean isoflavones modulate gut microbiota to benefit the health weight and metabolism. Frontiers in Cellular and Infection Microbiology (2022).