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BRS5 → BRS3 — Gut–Immune Drivers of Inflammatory Tone

This page explains the systems-level biological dependency between BRS5 and BRS3. It is informed by literature, integrated BRS architecture, allostatic context, expert interpretation, and mechanistic evidence from PM pages — but it does not duplicate the canonical PM relationship graph.

For explicit PM-to-PM relationships, see §6.2 Cross-BRS Mechanism Relationships on individual Primary Mechanism pages.

Biological Contribution​

Collectively, the Functional Mechanisms within BRS5 maintain adaptive gut barrier and microbial immune containment that enables BRS3 to sustain proportionate inflammatory tone under prolonged physiological demand.

Systems Significance​

By preserving these gut–immune interface capacities, BRS5 functions as an upstream enabling system, reducing the likelihood that gut-derived immune signalling progressively amplifies systemic inflammatory burden within BRS3 as peripheral load accumulates. Maintaining BRS5 therefore complements direct immune-modulatory biology within BRS3 by preserving barrier containment rather than substituting for inflammatory regulation itself.

Integrated Regulatory Capacity​

Together, the Functional Mechanisms within BRS5 maintain gut barrier integrity, microbial ecological stability and gut-derived immune signalling containment required to limit inappropriate inflammatory spillover during prolonged physiological demand. Rather than acting through a single barrier mechanism, these integrated capacities collectively regulate how peripheral immune signals shape inflammatory tone within BRS3.

Supporting Evidence​

  • O'Mahony et al., 2015 — Synthesised microbiota–gut–brain communication pathways linking gut ecology to peripheral and central inflammatory biology — supporting the framework interpretation that BRS5 gut–immune signalling shapes BRS3 inflammatory tone.
  • Slavich & Irwin, 2014 — Established stress-to-inflammation signalling as a systems-level pathway reshaping immune and neuroendocrine biology — supporting the interpretation that gut–immune perturbation can propagate inflammatory burden across BRS3 and connected systems.