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A specimen of the Metabolic drawer Drawer A · Metabolic

SLU-PP-332

Research Only

A small molecule ERR (Estrogen-Related Receptor) agonist developed at Saint Louis University. Preclinical studies suggest exercise-mimetic properties, but no human data exists. Represents early-stage research into pharmacologically activating exercise pathways.

ERR agonist 332 · Exercise mimetic compound

Research evidence
Very Low

Preclinical evidence only

Preclinical
63%
Human research
0%

Based on 8 cited sources

Numeric assessment unreviewed

A historical numeric score is recorded but has not passed a current, compound-specific assessment review. No numeric score is displayed.

This is a limitation of the numeric assessment, not a measured absence of benefit. It does not re-review the separately recorded catalogue classification or establish efficacy or safety.

Scoring context and limitations
!!
Evidence Level
very low
Not FDA-approved.
Research Only
Identity
SCALE · 1:1 N-TERMINUS C-TERMINUS ~450 Da
Also Known As
ERR agonist 332 • Exercise mimetic compound
Class
Small molecule
Length
0 amino acids
Mol. weight
~450 Da
Sequence
N/A (small molecule)
Molecular Structure
Hydrophobic
Polar
Positive
Negative

The proposed mechanisms of SLU-PP-332 are based entirely on animal and in vitro studies. No human mechanistic data exists, and this compound has never been tested in humans.

How It Works (Simplified)

SLU-PP-332 aims to activate “exercise pathways” pharmacologically by targeting ERR receptors:

ERR Activation

Binds to ERRalpha and ERRgamma receptors, triggering transcription of metabolic genes normally activated by exercise.

Mitochondrial Biogenesis

Promotes PGC-1alpha coactivation, signaling cells to build more mitochondria and enhance energy production capacity.

Oxidative Metabolism

Upregulates genes for fatty acid oxidation and oxidative phosphorylation, enhancing aerobic energy pathways.

Endurance Enhancement

In mice, these changes translated to improved treadmill endurance and reduced muscle fatigue markers.

Key Research: Billon C et al. (Saint Louis University, 2023) demonstrated ERR-mediated endurance enhancement in mouse models. PMID:36988910

Important Limitations

  • Mouse-only data - SLU-PP-332 has never been tested in humans
  • Single research group - Most data originates from one laboratory
  • Pharmacokinetics unknown - No data on absorption, metabolism, or distribution in humans
  • Long-term safety unknown - Chronic ERR activation effects are uncharacterized
  • Research compound only - Not manufactured to pharmaceutical standards
  • Translation uncertain - Mouse exercise physiology differs substantially from humans
i. Exercise Mimetic Pathway · Metabolic Enhancement
SLU-PP-332ERR Target GenesOXPHOS/FAO UpregulationEnhanced Aerobic Capacity
ii. ERR–PGC-1α Axis · Mitochondrial Biogenesis
SLU-PP-332ERRα/ERRγ activationPGC-1α coactivation
Mitochondrial biogenesis genes
Fatty acid oxidation genes
Oxidative phosphorylation genes
Mechanism ERRalpha/ERRgamma receptor activation promoting mitochondrial biogenesis
Supported 3 direct studies
Benefit may enhance endurance capacity
Evidence Level
Very Low
3 Animal
2 In Vitro
Mechanism PGC-1alpha coactivation increasing oxidative phosphorylation genes
Supported 4 direct studies
Benefit appears to improve mitochondrial function
Evidence Level
Very Low
2 Animal
3 In Vitro
Mechanism Upregulation of fatty acid oxidation and OXPHOS gene programs
Emerging 2 direct studies
Benefit suggested to enhance metabolic flexibility
Evidence Level
Very Low
2 Animal
2 In Vitro
Mechanism Confidence
Established
Supported
Emerging
Evidence Level
High
Moderate
Low
Very Low
Phase 01 1
Week 1-2

Based on mouse studies: ERR target gene activation may begin within days. Changes in oxidative gene expression observed in animal models. No human timeline data available.

PMID:36988910
Phase 02 2
Week 2-4

Mouse studies suggest mitochondrial biogenesis markers increase over this timeframe. PGC-1alpha pathway activation observed. Human response completely unknown.

PMID:20418374
Phase 03 3
Week 4-8

In mouse endurance studies, functional improvements in running capacity observed by 4-8 weeks. Translation to human physiology is entirely speculative.

PMID:36988910
Phase 04 4
Week 8+

Long-term effects unknown. Chronic ERR activation has not been studied in any species for extended periods. Safety of prolonged use is completely uncharacterized.

Research-based observations

This timeline reflects observations from published clinical and preclinical studies. Individual responses may vary significantly. This is not a guarantee of effects or a dosing schedule. Consult qualified healthcare providers for personalized guidance.

Synergistic
Compatible
Caution
Avoid
Compatible

Different mechanisms (metformin primarily affects hepatic gluconeogenesis and AMPK, SLU-PP-332 targets ERR in muscle). Theoretical complementary effects but no combined studies.

Non-overlapping mechanisms. BPC-157 focuses on tissue repair while SLU-PP-332 targets metabolic pathways. No known contraindications.

Non-overlapping mechanisms. TB-500 focuses on tissue repair and cell migration while SLU-PP-332 targets ERR-mediated metabolic pathways. No interaction data available.

Caution

Both target exercise-mimetic pathways (AICAR via AMPK, SLU-PP-332 via ERR). Combined activation of these parallel pathways has not been studied. Theoretical synergy but unknown safety profile.

Caution

Both target metabolic enhancement through nuclear receptor modulation (SR9009 via REV-ERB, SLU-PP-332 via ERR). No interaction data available. Exercise caution with combined metabolic modulators.

Avoid

GW501516 development was halted due to cancer concerns in animal studies. Combining with another metabolic modulator increases theoretical risk. Neither compound has human safety data.

Research Note: Interaction data is based on published literature, mechanistic understanding, and theoretical considerations. Most peptide combinations lack direct clinical study. This information is for educational purposes only and does not constitute medical advice. Always consult qualified healthcare providers.

This dossier synthesizes available evidence from peer-reviewed literature, regulatory documents, and clinical trial registries. Evidence strength labels summarize the cited material for this entry and should be read alongside its population, model, and study limitations.

For complete methodology details, see our Methodology page.

Important Disclaimer

This dossier is for educational purposes only and does not constitute medical advice. Always consult a qualified healthcare provider before making health decisions.

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8 comparisons

Conditions Studied

3 entries

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