Evidence map›Paper›PMID 39858441›Full record

ReviewBiomolecules2025

Tryptophan Kynurenine Pathway-Based Imaging Agents for Brain Disorders and Oncology-From Bench to Bedside.

Erik Stauff, Wenqi Xu, Heidi H Kecskemethy, Sigrid A Langhans, Vinay V R Kandula, Lauren W Averill, Xuyi Yue

Abstract readReview
In one paragraph

Review in Biomolecules, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.

0numbers the graph read from it
0cells of the map it votes in
2citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

2 citing papers in PubMed.

  1. Challenges in tracer development for tumor microenvironment (TME) imaging.European journal of nuclear medicine and molecular imaging · 2026
    Review
  2. Review
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors.

Erik StauffDepartment of Radiology, Nemours Children's Health, Delaware, Wilmington, DE 19803, USA.
Wenqi XuDepartment of Radiology, Nemours Children's Health, Delaware, Wilmington, DE 19803, USA.ORCID 0009-0007-7192-4656
Heidi H KecskemethyDepartment of Radiology, Nemours Children's Health, Delaware, Wilmington, DE 19803, USA.
Sigrid A LanghansDiagnostic & Research PET/MR Center, Nemours Children's Health, Delaware, Wilmington, DE 19803, USA.ORCID 0000-0003-4695-7468
Vinay V R KandulaDepartment of Radiology, Nemours Children's Health, Delaware, Wilmington, DE 19803, USA.
Lauren W AverillDepartment of Radiology, Nemours Children's Health, Delaware, Wilmington, DE 19803, USA.
Xuyi YueDepartment of Radiology, Nemours Children's Health, Delaware, Wilmington, DE 19803, USA.ORCID 0000-0002-3783-6392

Funding

Predictive Modeling & Optimal Control Framework for Model-Based Epidemic Response in DelawareP20GM103446 · NIGMS · UNIVERSITY OF DELAWARE · PI Shawn W Polson · 2012 to 2026
$67.2M
Targeting mechanosignaling in pediatric brain cancerR01CA263216 · NCI · NEMOURS CHILDREN'S HOSPITAL, DELAWARE · PI Sigrid A Langhans · 2022 to 2026
$1.6M
Development and Evaluation of Radiotracers for PET Imaging Angiotensin-Converting Enzyme 2 (ACE2)R21EB032025 · NIBIB · NEMOURS CHILDREN'S HOSPITAL, DELAWARE · PI YUE, XUYI · 2021 to 2023
$568k
NCI NIH HHS R01 CA263216NIBIB NIH HHS R21 EB032025NIGMS NIH HHS P20 GM103446NIH HHS P20GM103446NIH HHS P20GM103446-23S6NIH HHS R01CA263216NIH HHS R21EB032025
6 · The paper itself

Abstract

Tryptophan (Trp)-based radiotracers have excellent potential for imaging many different types of brain pathology because of their involvement with both the serotonergic and kynurenine (KYN) pathways. However, radiotracers specific to the kynurenine metabolism pathway are limited. In addition, historically Trp-based radiopharmaceuticals were synthesized with the short-lived isotope carbon-11. A newer generation of Trp-based imaging agents using the longer half-lived and commercially available isotopes, such as fluorine-18 and iodine-124, are being developed. The newly developed amino acid-based tracers have been demonstrated to have favorable radiochemical and imaging characteristics in pre-clinical studies. However, many barriers still exist in the clinical translation of KYN pathway-specific radiotracers.

Indexed as

Brain DiseasesKynurenineRadiopharmaceuticalsTryptophanAnimalsHumansKynurenineRadiopharmaceuticalsTryptophanbrain imagingclinical translationkynurenine pathwayPETradiopharmaceuticaltryptophan

Identifiers

PMID39858441
PMCPMC11762981

What OpenQuestion holds

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Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.