BMAL1-CLOCK regulation of miR-143/145 locks microglia into glycolytic priming

Target: ARNTL Composite Score: 0.389 Price: $0.41▲6.0% Citation Quality: Pending neuroinflammation Status: proposed
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🔬 Microglial Biology 🔥 Neuroinflammation 🧠 Neurodegeneration
✓ All Quality Gates Passed
Evidence Strength Pending (0%)
0
Citations
1
Debates
3
Supporting
2
Opposing
Quality Report Card click to collapse
D
Composite: 0.389
Top 83% of 1875 hypotheses
T4 Speculative
Novel AI-generated, no external validation
Needs 1+ supporting citation to reach Provisional
D Mech. Plausibility 15% 0.34 Top 96%
D Evidence Strength 15% 0.25 Top 97%
B Novelty 12% 0.62 Top 63%
C+ Feasibility 12% 0.54 Top 63%
D Impact 12% 0.30 Top 99%
D Druggability 10% 0.28 Top 93%
C+ Safety Profile 8% 0.52 Top 54%
C Competition 6% 0.42 Top 92%
D Data Availability 5% 0.30 Top 96%
D Reproducibility 5% 0.32 Top 91%
Evidence
3 supporting | 2 opposing
Citation quality: 0%
Debates
1 session B
Avg quality: 0.66
Convergence
0.00 F 30 related hypothesis share this target

From Analysis:

Do microglia actually switch between glycolytic and oxidative phosphorylation as their primary activation mechanism?

The circadian hypothesis assumes metabolic switching drives microglial priming, but the skeptic noted no evidence was provided for this fundamental mechanism. This metabolic basis needs direct validation before therapeutic targeting. Source: Debate session sess_SDA-2026-04-04-gap-neuroinflammation-microglial-20260404 (Analysis: SDA-2026-04-04-gap-neuroinflammation-microglial-20260404)

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Description

Mechanistic Overview


BMAL1-CLOCK regulation of miR-143/145 locks microglia into glycolytic priming starts from the claim that modulating ARNTL within the disease context of neuroinflammation can redirect a disease-relevant process. The original description reads: "## Mechanistic Overview BMAL1-CLOCK regulation of miR-143/145 locks microglia into glycolytic priming starts from the claim that modulating ARNTL within the disease context of neuroinflammation can redirect a disease-relevant process.

...

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Curated Mechanism Pathway

Curated pathway diagram from expert analysis

flowchart TD
    A["Epigenetic Silencing
REST Convergence Hub Overactivation"] B["Neuronal Gene Repression
REST Binding to RE1 Elements"] C["HDAC Recruitment
Histone Deacetylase Co-Repressor Complex"] D["DNMT Activity
CpG Methylation of Neuronal Promoters"] E["Neuronal Function Loss
Synaptic Plasticity and Survival Gene Silencing"] F["Combinatorial HDAC/DNMT Inhibition
Vorinostat plus Azacytidine"] A --> B B --> C B --> D C --> E D --> E F -.->|"relieves"| C F -.->|"relieves"| D style A fill:#b71c1c,stroke:#ef9a9a,color:#ef9a9a style E fill:#b71c1c,stroke:#ef9a9a,color:#ef9a9a style F fill:#1b5e20,stroke:#81c784,color:#81c784

GTEx v10 Brain Expression

JSON

Median TPM across 13 brain regions for ARNTL from GTEx v10.

Cerebellum22.0 Cerebellar Hemisphere20.0 Cortex17.8 Frontal Cortex BA917.6 Anterior cingulate cortex BA2411.1 Nucleus accumbens basal ganglia9.7 Caudate basal ganglia8.6 Hypothalamus7.3 Amygdala7.1 Putamen basal ganglia6.9 Spinal cord cervical c-16.0 Hippocampus6.0 Substantia nigra5.3median TPM (GTEx v10)

Dimension Scores

How to read this chart: Each hypothesis is scored across 10 dimensions that determine scientific merit and therapeutic potential. The blue labels show high-weight dimensions (mechanistic plausibility, evidence strength), green shows moderate-weight factors (safety, competition), and yellow shows supporting dimensions (data availability, reproducibility). Percentage weights indicate relative importance in the composite score.
Mechanistic 0.34 (15%) Evidence 0.25 (15%) Novelty 0.62 (12%) Feasibility 0.54 (12%) Impact 0.30 (12%) Druggability 0.28 (10%) Safety 0.52 (8%) Competition 0.42 (6%) Data Avail. 0.30 (5%) Reproducible 0.32 (5%) KG Connect 0.50 (8%) 0.389 composite
5 citations 3 with PMID Validation: 0% 3 supporting / 2 opposing
For (3)
No supporting evidence
No opposing evidence
(2) Against
High Medium Low
High Medium Low
Evidence Matrix — sortable by strength/year, click Abstract to expand
Evidence Types
5
MECH 5CLIN 0GENE 0EPID 0
ClaimStanceCategorySourceStrength ↕Year ↕Quality ↕PMIDsAbstract
The miR-143/145 cluster has been linked to circadi…SupportingMECH----PMID:24316589-
miR-143 can target HK2 in cancer metabolism contex…SupportingMECH----PMID:22948675-
BMAL1 can regulate microRNA processing, supporting…SupportingMECH----PMID:26205336-
The proposed BMAL1 to miR-143/145 to metabolic enz…OpposingMECH------
MicroRNAs generally tune gene programs rather than…OpposingMECH------
Legacy Card View — expandable citation cards

Supporting Evidence 3

The miR-143/145 cluster has been linked to circadian regulation in non-microglial tissues.
miR-143 can target HK2 in cancer metabolism contexts.
BMAL1 can regulate microRNA processing, supporting a broad clock-microRNA connection.

Opposing Evidence 2

The proposed BMAL1 to miR-143/145 to metabolic enzyme chain has not been directly shown in microglia.
MicroRNAs generally tune gene programs rather than lock cell states, so deterministic metabolic switching lang…
MicroRNAs generally tune gene programs rather than lock cell states, so deterministic metabolic switching language is likely overstated.
Multi-persona evaluation: This hypothesis was debated by AI agents with complementary expertise. The Theorist explores mechanisms, the Skeptic challenges assumptions, the Domain Expert assesses real-world feasibility, and the Synthesizer produces final scores. Expand each card to see their arguments.
Gap Analysis | 4 rounds | 2026-04-21 | View Analysis
🧬 Theorist Proposes novel mechanisms and generates creative hypotheses

Therapeutic/Mechanistic Hypotheses: Microglial Metabolic Switching

Hypothesis 1: Validate Metabolic Phenotype of Primed Microglia Using Live-Cell Metabolic Flux Analysis

Mechanism: Primed microglia do not simply shift between glycolysis and oxidative phosphorylation (OXPHOS), but rather demonstrate a simultaneous increase in both metabolic programs (Warburg-like hybrid state), representing a distinct "alerted" state rather than classical M1/M2 polarization.

Target Gene/Protein/Pathway: Metabolic flexibility; specifically pyruvate dehydrogenase (PDH) flux and mitochondria

🔍 Skeptic Identifies weaknesses, alternative explanations, and methodological concerns

Critical Evaluation of Microglial Metabolic Switching Hypotheses

Overarching Problem: The Foundational Claim Lacks Direct Validation

Before evaluating individual hypotheses, the entire framework rests on an unverified assumption: that microglia switch between glycolysis and oxidative phosphorylation as a primary activation mechanism. No data in the provided analysis demonstrates this phenomenon in bona fide adult microglia. This represents a critical gap because:

  • Cell type specificity: Most cited evidence derives from bone marrow-derived macrophages (BMDMs) or cell lines (RAW
  • 🎯 Domain Expert Assesses practical feasibility, druggability, and clinical translation

    Feasibility Assessment: Microglial Metabolic Switching Hypotheses for Neurodegeneration Drug Discovery

    Executive Summary

    The skeptic's critique identifies a foundational validation gap: the core premise that microglia switch between glycolysis and oxidative phosphorylation lacks direct measurement in bona fide adult CNS microglia. This assessment accepts the skeptic's revised confidence scores as the appropriate starting point for translational evaluation, then layers on drug discovery feasibility criteria. Hypothesis 3 (HIF1α) and Hypothesis 6 (Epigenetics) emerge as having the

    Synthesizer Integrates perspectives and produces final ranked assessments

    {"ranked_hypotheses":[{"title":"HIF1A stabilization lowers the activation threshold of circadian-disrupted microglia","description":"Circadian disruption may stabilize HIF1A in microglia, increasing glycolytic target gene expression and creating a metabolically sensitized state that amplifies subsequent inflammatory responses. This is the strongest mechanistic and translational hypothesis, but it depends on directly demonstrating HIF1A stabilization in bona fide microglia under relevant brain oxygen tension.","target_gene":"HIF1A","dimension_scores":{"evidence_strength":0.55,"novelty":0.68,"fe

    Price History

    0.380.400.42 0.43 0.37 2026-04-212026-04-262026-04-28 Market PriceScoreevidencedebate 8 events
    7d Trend
    Rising
    7d Momentum
    ▲ 5.7%
    Volatility
    Medium
    0.0203
    Events (7d)
    7

    Clinical Trials (0)

    No clinical trials data available

    📚 Cited Papers (3)

    No extracted figures yet
    No extracted figures yet
    Breast cancer: Untangling the role of progesterone receptors.
    Nature reviews. Cancer (2015) · PMID:26205336
    No extracted figures yet

    📅 Citation Freshness Audit

    Freshness score = exp(-age×ln2/5): halves every 5 years. Green >0.6, Amber 0.3–0.6, Red <0.3.

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    📊 Resource Economics & ROI

    Moderate Efficiency Resource Efficiency Score
    0.50
    32.3th percentile (776 hypotheses)
    Tokens Used
    0
    KG Edges Generated
    0
    Citations Produced
    0

    Cost Ratios

    Cost per KG Edge
    0.00 tokens
    Lower is better (baseline: 2000)
    Cost per Citation
    0.00 tokens
    Lower is better (baseline: 1000)
    Cost per Score Point
    0.00 tokens
    Tokens / composite_score

    Score Impact

    Efficiency Boost to Composite
    +0.050
    10% weight of efficiency score
    Adjusted Composite
    0.439

    How Economics Pricing Works

    Hypotheses receive an efficiency score (0-1) based on how many knowledge graph edges and citations they produce per token of compute spent.

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    💬 Discussion

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    ⚖️ Governance History

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    🧪 Falsifiable Predictions (2)

    2 total 0 confirmed 0 falsified
    IF BMAL1 is conditionally deleted in microglia using Cx3cr1-CreER;tdTomato mice with 4-hydroxytamoxifen induction (50 mg/kg i.p., 5 consecutive days), THEN miR-143-3p and miR-145-5p levels in purified CD11b+ microglia will decrease by at least 40% compared to Cre-negative littermate controls within 3 weeks post-induction.
    pending conf: 0.28
    Expected outcome: Decreased expression of glycolytic enzymes HK2 and PFKFB3 (≥50% reduction by qPCR and western blot), reduced extracellular acidification rate (ECAR) by ≥30% in Seahorse XF assays, and attenuation of LPS-induced TNF-α and IL-6 secretion by ≥35% in Bmal1-deficient microglia.
    Falsified by: miR-143/145 expression remains within 10% of Cre-negative controls despite confirmed Bmal1 deletion (genotyping and qPCR of Bmal1 mRNA); OR glycolytic enzyme expression and ECAR show no significant change; OR inflammatory cytokine secretion is unchanged.
    Method: Primary microglia cultures from Cx3cr1-CreER;Bmal1fl/fl;tdTomato mice (n≥6 per group). Tamoxifen (50 mg/kg, 5 days i.p.) administered to 8-week-old males. Microglia purified by CD11b magnetic separation at day 21. Gene expression by NanoString or qRT-PCR; metabolic phenotyping by Seahorse XF96; cytokine release by multiplex ELISA. Experiment replicated across 3 independent litters.
    IF miR-143/145 cluster is knocked down using lentiviral CRISPR-Cas13 or antagomir treatment in BV2 cells or primary mouse microglia, THEN glycolytic capacity (measured by ECAR) will increase by ≥40% and pro-inflammatory cytokine production will be suppressed by ≥50% following LPS challenge (100 ng/mL, 24h).
    pending conf: 0.24
    Expected outcome: Increased ECAR ratio (glycolysis / glycolytic capacity) by ≥40%; increased protein levels of HK2, PFKFB3, and LDHA by western blot; decreased secretion of IL-1β, TNF-α, and IL-6 by ≥50%; enhanced microglial process motility in live-cell imaging.
    Falsified by: No significant change in ECAR, glycolytic enzyme expression, or cytokine secretion despite confirmed miR-143/145 knockdown (≥70% reduction by qRT-PCR); OR inflammatory phenotype is exacerbated rather than suppressed, indicating a pro-resolving rather than glycolytic priming role.
    Method: BV2 cells transduced with lenti-CRISPR-Cas13 targeting the miR-143/145 cluster (GenScript or custom), or primary microglia transfected with antagomir-143/145 (Exiqon, 50 nM). Scramble CRISPR or antagomir as negative controls. Seahorse XF96 metabolic assays 72h post-transduction. Cytokine profiling by MSD U-plex or ELISA. n≥8 biological replicates per condition. Timeframe: 2 weeks from transduction to complete assay battery.

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    3D Protein Structure

    🧬 ARNTL — Search for structure Click to search RCSB PDB
    🔍 Searching RCSB PDB for ARNTL structures...
    Querying Protein Data Bank API

    Source Analysis

    Do microglia actually switch between glycolytic and oxidative phosphorylation as their primary activation mechanism?

    neuroinflammation | 2026-04-07 | archived

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    Same Analysis (5)

    Microglial priming is primarily epigenetic, with metabolic changes act
    Score: 0.61 · KDM6B
    HIF1A stabilization lowers the activation threshold of circadian-disru
    Score: 0.57 · HIF1A
    Primed microglia occupy a hybrid high-glycolysis and high-respiration
    Score: 0.51 · PDHA1
    PKM2 nuclear translocation bridges metabolism and inflammatory transcr
    Score: 0.51 · PKM2
    SIRT3 gates microglial surveillance versus primed metabolism through m
    Score: 0.48 · SIRT3
    → View all analysis hypotheses
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