Can mycotoxin-related barrier disruption increase inflammatory signaling and immune exposure to tissue antigens?

Mycotoxins are fungal contaminants that can affect mucosal epithelia in experimental systems. The proposed link between barrier injury, systemic inflammation, and immune access to otherwise compartmentalized material is biologically credible, but remains primarily mechanistic rather than clinically demonstrated.

Barrier and inflammatory biology

• Experimental evidence indicates that deoxynivalenol (DON), ochratoxin A, aflatoxins, zearalenone, fumonisins, patulin, and T-2 toxin can impair epithelial integrity. Reported changes include altered or reduced tight-junction proteins, decreased transepithelial electrical resistance, and increased paracellular permeability.
• Oxidative stress, cytotoxicity, and activation of MAPK, NF-κB, and MLCK pathways provide coherent mechanisms for junctional disruption and inflammatory signaling.
• A key downstream route is translocation of microbial material—particularly lipopolysaccharide (LPS), bacteria, or bacterial products—across a more permeable intestinal epithelium. Experimental models report increased inflammatory mediators including IL-1β, IL-6, IL-8, and TNF-α.

Immune exposure to antigens

• Barrier compromise can plausibly increase immune contact with luminal material that would normally remain segregated from mucosal immune cells. DON-associated bacterial or bacterial-product translocation supports this general mechanism.
• This does not establish that self/tissue antigens specifically cross the barrier, are presented in an immunogenic context, or produce autoantibodies, loss of tolerance, neural-directed antibodies, or autoimmune disease.

Clinical interpretation

• In people, urinary DON and DON-glucuronide measurements indicate recent dietary exposure, not barrier dysfunction or systemic inflammation. Available human studies have not directly linked biomarker-confirmed exposure with validated permeability measures, circulating CRP, IL-6, or TNF-α.
• Bottom line: Mycotoxin-related epithelial disruption is a plausible contributor to microbial translocation and inflammatory signaling, and may increase immune exposure to material across mucosal barriers. It should not presently be interpreted as established evidence of systemic inflammation or tissue-antigen–driven autoimmunity in humans.