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Iodine I 131 IPA

Radiopharmaceutical · Cytotoxic, directed at L-amino acid transporter 1 (SLC7A5) · developed by Telix Pharmaceuticals Pty

Phase 1 Most advanced trial
TLX Developer
1 Registered trials

What is Iodine I 131 IPA?

Iodine I 131 IPA is a radioconjugate of 4-iodo-L-phenylalanine labeled with iodine I 131 that targets LAT1, an amino acid transporter overexpressed in glioma cells. It crosses the blood-brain barrier and delivers cytotoxic beta radiation to malignant gliomas, with potential radiosensitizing effects. It is studied in glioblastoma.

Summary written with AI from the sources listed at the end of this page.

At a glance

Also known as
131I-IPA
Drug type
Radiopharmaceutical
Targets
L-amino acid transporter 1 (SLC7A5)
Mechanism
Cytotoxic, directed at L-amino acid transporter 1 (SLC7A5)
Pathways
apoptosis, radiation-induced bystander effects
Therapy area
Oncology
Developer
Telix Pharmaceuticals Pty Limited (TLX)
FDA status
Investigational, not approved in the US. Most advanced trial: Phase 1

🧪 Clinical trials

TrialPhaseConditionStatusSponsor
NCT05450744 Phase 1 Neoplastic Disease Active not recruiting TLX

Trials of the companies BioRadar tracks, from ClinicalTrials.gov, most advanced phase first.

Conditions studied

GlioblastomaGlioblastoma MultiformeNeoplastic Disease

Other drugs acting on SLC7A5

More from Telix Pharmaceuticals Pty

Sources

Updated Oct 3, 2026. Something wrong or missing? Report it on the TLX page.

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Data: FDA (Drugs@FDA, Purple Book, DailyMed), NIH (NCI Thesaurus, GSRS, RxNorm), ClinicalTrials.gov • Informational purposes only, not medical or investment advice. • All drugs A–Z

This data is for informational purposes only, not investment advice. BioRadar does not provide buy/sell recommendations. Past performance does not guarantee future results. Always do your own due diligence.