# Study of Biodistribution, Metabolism, Excretion and Brain Uptake11C-M503

> **NCT06303921** · EARLY_PHASE1 · RECRUITING · sponsor: **University of Pennsylvania** · enrollment: 70 (estimated)

## Conditions studied

- Tauopathies

## Interventions

- **DRUG:** 11C-M503 PET
- **DIAGNOSTIC_TEST:** Brain MRI
- **DIAGNOSTIC_TEST:** Amyloid PET
- **BEHAVIORAL:** Neurological assessments

## Key facts

- **NCT ID:** NCT06303921
- **Lead sponsor:** University of Pennsylvania
- **Sponsor class:** OTHER
- **Phase:** EARLY_PHASE1
- **Study type:** INTERVENTIONAL
- **Status:** RECRUITING
- **Start date:** 2024-02-16
- **Primary completion:** 2029-02
- **Final completion:** 2029-02
- **Target enrollment:** 70 (ESTIMATED)
- **Last updated:** 2026-04-24


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT06303921

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT06303921, "Study of Biodistribution, Metabolism, Excretion and Brain Uptake11C-M503". Retrieved via AI Analytics 2026-07-13 from https://api.ai-analytics.org/clinical/NCT06303921. Licensed CC0.

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