Tracer library / [225Ac]Ac-DOTA-TA99

[225Ac]Ac-DOTA-TA99

Also written as [Ac-225]Ac-DOTA-TA99
Radionuclide
Ac-225 t½ 14284.8 min
Modality
Therapy
Production route
—
Stage
Preclinical
Syntheses indexed
1

What it is

Compound class
Radiolabeled monoclonal antibody (DOTA-conjugated, anti-melanoma antigen TA99 mAb)
Target / mechanism
TA99 monoclonal antibody target antigen (melanoma-associated antigen, gp75/TYRP1) on murine melanoma cells PMID 40015918
Clinical application
Preclinical murine melanoma model of radiopharmaceutical therapy (alpha-RPT), studying immune-mediated response PMID 40015918
Theranostic pair
—

Published syntheses

ModuleCassettePurificationYield %RCP %Precursor / supplierSource
Manual synthesis—SPE—>90%TA99-DOTA
BioXCell
40015918
2025 J Nucl Med
the desired activity (9.25 or 18.5 kBq) was added to the reaction mixture (for a specific activity of 37 kBq/µg), and the solution was incubated at 40°C for 1 h

Precursor

Common precursor
—
Suppliers seen in the literature
—
Cited suppliers in indexed syntheses
BioXCell
Typical final purification
—

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Notes

Added at stage 22: promoted from 'Reported once' (single-article, no diagnostic pair at discovery) because a full-text synthesis with extracted data exists in parsed-therapy.xlsx -- PMID(s): 40015918. Target/mechanism, clinical application, indications, approval and precursor fields still need per-agent research and are intentionally left empty. Compound class inferred from precursor name (not stated outright) -- PMID 40015918: 'TA99-DOTA (4.82 mg/mL; DOTA/mAb ratio, 2 ± 1) in 0.25 M ammonium acetate buffer (pH 7) was prepared.'. Stage set/updated at stage 39 from PMID 40015918: 'Preclinical and clinical studies increasingly show that the immune response plays a major role in radiotherapy.'.
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