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[18F]fluoroethyltryptophan
- Development stage
- Phase 2
- Modality
- Small Molecules, Antibody-Radionuclide Conjugates → Antibody Conjugates → Antibody-Based Therapeutics
- Administration
- Intravenous
01
Overview
[18F]fluoroethyltryptophan (L-1-[18F]FETrp) is a fluorine-18 labeled small molecule radiotracer designed for positron emission tomography (PET) imaging of cancer. It is a tryptophan analog that targets both overexpressed amino acid transporters and the indoleamine 2,3-dioxygenase (IDO)-mediated kynurenine pathway, which is frequently upregulated in various malignancies to promote immunosuppression. By tracking tumoral tryptophan metabolism and transport, this tracer provides metabolic maps that can identify active tumor volumes and non-enhancing infiltrations, particularly in glioblastoma, which may be missed by standard contrast-enhanced MRI. It is primarily used as a diagnostic tool for treatment planning and monitoring in oncology.
- Other names
- L-1-[18F]fluoroethyl-tryptophan1-L-[18F]FETrp
02
Targets
LAT2 (Linker for activation of T cells family member 2)SLC6A14 (Sodium- and chloride-dependent neutral and basic amino acid transporter B(0+))Amino acid transport system ASCIDO1 (Indoleamine 2,3-dioxygenase 1)SLC7A5 (Large neutral amino acid transporter small subunit 1)
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