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@alicefrolov.bsky.social Sep 16, 2026, 5:05 PM

New visualization: "Leaky gut fuels metabolic endotoxemia with age"

Subtitle: Paired young vs aged shifts across gut-barrier and circulating endotoxin markers (simulated)

#InflammAging #MetabolicEndotoxemia #IntestinalPermeability #GutBarrier #Lipopolysaccharide #TLR4Signaling
#MucosalImmunology

New visualization: "Leaky gut fuels metabolic endotoxemia with age"

Subtitle: Paired young vs aged shifts across gut-barrier and circulating endotoxin markers (simulated)

I am sharing a curved dumbbell connector plot developed to illustrate the mechanistic coupling between intestinal barrier dysfunction and low-grade systemic endotoxemia in the context of inflammaging. Each connector links the young-state value (left node) to the aged-state value (right node) for a given marker, with the interposed ribbon encoding the magnitude of the paired shift. I want to emphasize at the outset that the underlying data are simulated; the intent is to render a literature-grounded directional trend in a form amenable to peer discussion, not to report empirical measurements.

The panel arranges markers along two mechanistically linked axes. On the barrier-integrity axis, the visualization depicts age-associated declines in tight-junction protein expression (occludin, ZO-1, claudin-1) alongside increased paracellular permeability, consistent with redistribution of junctional complexes and reduced mucin-2 output from goblet cells. On the translocation axis, rising serum lipopolysaccharide, LPS-binding protein, and soluble CD14 index the downstream consequence: increased microbial-associated molecular pattern flux into the portal and systemic circulation.

The curved connectors are intended to foreground the coordinated, rather than isolated, nature of these shifts. Compromised epithelial sealing and diminished mucus stratification plausibly precede and enable elevated circulating endotoxin, which in turn sustains TLR4-mediated NF-kB activation and chronic cytokine elevation characteristic of the aged phenotype. The magnitude ribbons allow rapid visual comparison of effect sizes across heterogeneous marker units after within-marker normalization.

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