BRS5 → BRS4 — Gut-Metabolic Inputs to Mitochondrial Energetics
Selected gut-derived metabolites may influence cellular energy handling in BRS4, but current page-level evidence is thin.
Dependency
BRS5 can supply short-chain fatty acids and other microbial metabolites that peripheral tissues use as fuels or signalling molecules. Those inputs may condition mitochondrial substrate availability. Glucocorticoid and glucose effects on mitochondria belong to BRS6 → BRS4, not to this route.
Principal Routes
| Route | Contribution to BRS4 | Relationship |
|---|---|---|
| SCFA production and signalling | Potential fuel and signalling input to cellular energy metabolism | Conditional |
Network Interpretation
Do not treat Picard’s mitochondrial allostatic-load account as BRS5 evidence. That work concerns glucocorticoid and glucose load from BRS6. A genuine BRS5 → BRS4 claim requires metabolite-to-mitochondria evidence, not stress-to-mitochondria evidence reused from another dependency.
Boundary and Evidence Status
Flagged for review. The previous citation set did not establish this named dependency: Picard et al. 2014 supports BRS6 → BRS4; Jaggar et al. 2020 is a gut–brain review, not a mitochondrial bioenergetics trial. The page is retained as a conditional SCFA/metabolite hypothesis until stronger human or mechanistic sources are attached. It should not be read as an evidenced energetic treatment pathway.
Supporting Evidence
- Jaggar et al., 2020 — Reviews microbial metabolite signalling in gut–brain biology; it does not demonstrate that those metabolites restore mitochondrial reserve.