Tracer library / [90Y]Y-FAPI-46
Structure of FAPI-46 (unlabelled parent compound, from PubChem)
Unlabelled parent compoundPubChem CID 139400499

[90Y]Y-FAPI-46

Also written as [90Y]Y-FAPI-46; [Y-90]Y-FAPI-46
Radionuclide
Y-90 t½ 3843 min
Modality
Therapy
Production route
—
Stage
Clinical research
Syntheses indexed
1

What it is

Compound class
FAP inhibitor (FAPI) radiotracer
Target / mechanism
Fibroblast activation protein (FAP) expressed on cancer-associated fibroblasts PMID 41599688
Clinical application
Radioligand therapy targeting FAP-expressing tumours (e.g. solitary fibrous tumours) using 90Y-FAPI-46 PMID 42495195
Theranostic pair
[68Ga]Ga-FAPI-46

Published syntheses

ModuleCassettePurificationYield %RCP %Precursor / supplierSource
EasyOne
Trasis
——56 ± 5%>99%FAPI-4635533534
2022 Nucl Med Biol
the cassette based synthesis module Trasis EASYONE - a radiochemical yield of 88 ± 7% and 56 ± 5%

Clinical literature

Clinical studies in the indexed corpus, ordered by design (multicentre, prospective, retrospective, others, case reports last) and then by year. Titles and links only, as published; this is not a summary of the evidence.

  1. 90Y-FAPI-46 Radiopharmaceutical Therapy in Sarcoma and Other Solid Tumors: An Updated Cohort Analysis.
    2026 · J Nucl Med · Retrospective
  2. Is FAP the key to unlocking treatment for rare soft-tissue sarcomas?
    2026 · Am J Nucl Med Mol Imaging · Clinical study
  3. 90Y-FAPI-46 Theranostics Leads to Near-Complete Metabolic Response in 3 Patients with Solitary Fibrous Tumors.
    2025 · J Nucl Med · Case report, multicentre

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Quality control Preliminary - inferred from compound class

Ph. Eur. monograph
not verified No Ph. Eur. check is recorded for this entry.
USP monograph
not verified No USP check is recorded for this entry.
AppearancepHRCP HPLCHPLC UVRadionuclidic (HPGe)Half-lifeActivityEndotoxins (LAL)SterilityFilter integrityOsmolalityMolar activityMetal impurities
How this set was arrived at. base set per Ph. Eur. general monograph 0125 (rule); radiometal tracer -> metal impurities (rule); therapeutic radiopharmaceutical -> osmolality (rule); receptor ligand with a saturable target -> molar activity (rule)

Tests listed by reference only. Monograph texts are copyrighted and are not reproduced here. How these are derived

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Notes

Added from reverse module search (stage 6); 4 article(s) with Y-90. Stage set/updated at stage 23 from PMID 41599688: 'Therapeutic evidence shows encouraging tumour retention and safety profiles for agents such as [177Lu]Lu-FAP-2286 and [90Y]Y-FAPI-46, while α-emitting radiotracers (e.g., [225Ac]Ac-FAPI-04) demonstrate potent antitumor effects in preclinical models.'. | Stage 28: added indication(s) onc-sarcoma from consolidated missing-rubric review. | Stage 30 (2026-09-18): Stage was 'early-stage clinical evidence / investigational'; normalised to 'Clinical research', original wording kept here.
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