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BRS-X(Hormones) — Hormone Signalling & Regulation

BRS-X(Hormones-PM2) - Estrobolome Regulation​

1. Definition​

Microbiome-mediated regulation of oestrogen metabolism, deconjugation, recycling, and elimination through beta-glucuronidase activity and enterohepatic circulation.

2. Target Functional Outcome / Phenome​

These mappings are translational relationships, not single-mechanism outcome claims. Phenomes are emergent functional patterns supported by multiple interacting PMs across the BRAIN Framework.

Emotional Regulation — modulates
  • Confidence: medium
  • Evidence Level: mechanistic
  • Rationale: The estrobolome can influence systemic oestrogen exposure through microbial beta-glucuronidase activity; downstream affective phenome effects are indirect and should not be presented as single-mechanism causal claims.
  • Key References:
Cognitive Clarity — indirect
  • Confidence: low-medium
  • Evidence Level: mechanistic
  • Rationale: Altered oestrogen recycling may indirectly influence neural signalling context relevant to cognitive clarity without establishing direct single-pathway outcome certainty.
  • Key References:
Hormonal Volatility — modulates
  • Confidence: medium
  • Evidence Level: mechanistic
  • Rationale: Estrobolome activity may support or disrupt oestrogen exposure depending on microbial beta-glucuronidase balance and enterohepatic recycling direction.
  • Key References:

3. Intervention Breakdown​

Food-State Dominant

4. Functional Role​

↑ balanced oestrogen deconjugation/recycling context; ↓ dysbiotic beta-glucuronidase skew; ↑ enterohepatic regulation of sex-hormone exposure

5. Mechanistic Basis​

Summary​

The estrobolome links microbial enzyme activity to systemic oestrogen exposure through enterohepatic circulation, constrained by fermentable substrate availability via BRS5(KC1) [1][2][3].

Estrobolome, beta-glucuronidase, and enterohepatic recycling

(Microbial oestrogen metabolism)​

Gut bacteria with beta-glucuronidase activity can deconjugate oestrogen metabolites in the intestinal lumen, influencing whether oestrogens are recycled via enterohepatic circulation or eliminated → Hu et al. (2023) [1]; Sui et al. (2021) [2]; Ervin et al. (2019) [3]

(Substrate dependence)​

Fermentable fibre and diverse plant substrates support microbial ecology that may favour more balanced estrobolome function relative to low-fibre, ultra-processed dietary patterns.

(Boundaries of the mechanism)​

Direct neural oestrogen signalling is owned by BRS-X(Hormones-PM1). Barrier containment and LPS context intersect via BRS5(FM1).

(Integration within BRS-X(Hormones))​

This PM operationalises the gut-mediated oestrogen recycling arm of BRS-X(Hormones-FM1), dependent on BRS5(KC1) — Fermentable Fibre Availability.

6. Connected BRS-X(Hormones) Mechanisms​

6.1 Overarching Functional Mechanism​

6.2 Connected Primary Mechanisms​

7. Connected Mechanisms​

8. Dietary Levers​

8.1 Direct Dietary Levers​

  • Fermentable fibre ← oats, legumes, vegetables, resistant starch sources
  • Plant diversity ← varied whole-plant dietary patterns

8.2 Cofactors and Supporting Inputs​

  • fermentable fibre
  • plant diversity

8.3 KCs (Key Constraints)​

9. Lifestyle Levers​

Lifestyle
  • Repeated daily fermentable substrate delivery matters more than isolated high-fibre meals.
  • Antibiotic exposure and ultra-processed dietary displacement may work against estrobolome stability.

10. References​

  1. Hu et al. (2023)
  2. Sui et al. (2021)
  3. Ervin et al. (2019)