Project UG — Research Brief · Uterine Fibroids
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Estrogen receptor β dysregulation plausibly drives fibroid onset disparity in Black women

Confidence Score

72/100

Medium confidence

March 12, 2026

Seven agents converge on ERβ differential expression as the strongest mechanistic candidate for racial disparity in uterine fibroid onset, with Vitamin D deficiency as the most testable upstream modulator. Evidence is consistent but critically underpowered — all ERβ studies use n<120 single-institution samples. The Skeptic downgrades confidence to Medium. The Ethicist flags that community advisory board involvement is required before any new trial proceeds.

Analysis Timeline

1
Mar 11, 2026, 09:15 AM
62/100

Initial agent synthesis identifies ERβ dysregulation as a candidate mechanism, but evidence base is limited. Only 2 studies directly compare Black vs White fibroid tissue. Vitamin D hypothesis is speculative.

Initial run with 3 agents (Cartographer, Mechanist, Epidemiologist)

2
Mar 11, 2026, 06:45 PM
68/100
+6

Full agent swarm integration adds Analogist insights on Vitamin D / ERβ pathway from endometriosis literature and Skeptic critique of methodological rigor. Confidence increases with converging evidence, but gaps remain.

Added Skeptic + Analogist analysis; Ethicist review flagged consent issues

4 evidence items2 uncertainties
3
Mar 12, 2026, 02:32 PMCurrent
72/100
+4

Seven agents converge on ERβ differential expression as the strongest mechanistic candidate for racial disparity in uterine fibroid onset, with Vitamin D deficiency as the most testable upstream modulator. Evidence is consistent but critically underpowered — all ERβ studies use n<120 single-institution samples. The Skeptic downgrades confidence to Medium. The Ethicist flags that community advisory board involvement is required before any new trial proceeds.

Final iteration: integrated Synthesizer + Ethicist feedback. All 7 agents converged.

2 ethics flags3 uncertainties

Evidence Base

Cartographer: race-stratified data absent in 96.3% of 847 indexed studies

Epidemiologist: Black women diagnosed 7 years earlier, adjusted HR 2.9 (95% CI 2.4–3.5)

Mechanist: ERβ protein 40–60% lower in fibroid tissue from Black patients across 4 studies

Analogist: Vitamin D / ERβ axis identified as convergent pathway from endometriosis literature

⚠ Ethics Review Required

• Community advisory board required before new trial design proceeds

• Avoid "high-risk population" framing — use "underserved" or "under-recruited"

Discussion

Key Uncertainties

?All ERβ studies n<120, single-institution — community-recruited replication is absent

?Vitamin D / ERβ interaction not directly tested in fibroid tissue

?Structural determinants (stress, chemical exposure) not yet modeled alongside biological mechanisms

Recommended Next Steps

→Community-recruited race-stratified cohort study (n≥500) to replicate ERβ finding

→Race-stratified Vitamin D intervention trial — highest-value short-term step

→Establish community advisory board with CBPR framework before IRB submission

→Apply for NIMHD P01 mechanism to fund integrated biomarker + community registry study

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