Evidence map›Paper›PMID 34761284›Full record

ArticleEuropean journal of nuclear medicine and molecular imaging2022

A metabolically stable PET tracer for imaging synaptic vesicle protein 2A: synthesis and preclinical characterization of [

Chao Zheng, Daniel Holden, Ming-Qiang Zheng, Richard Pracitto, Kyle C Wilcox, Marcel Lindemann, Zachary Felchner, Li Zhang, Jie Tong, Krista Fowles and 5 more

Open access · hybridAbstract read
In one paragraph

Article in European journal of nuclear medicine and molecular imaging, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed
2.8field-weighted citation impact, top 9% of its field
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

20 citing papers in PubMed, 34 citations in OpenAlex.

  1. SV2A PET reveals synaptic density loss in experimental autoimmune encephalomyelitis and in a pilot multiple sclerosis study.Proceedings of the National Academy of Sciences of the United States of America · 2026
    Article
  2. Quantitative analysis of [European journal of nuclear medicine and molecular imaging · 2026
    Article
  3. [Journal of nuclear medicine : official publication, Society of Nuclear Medicine · 2025
    Article
  4. Article
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  6. Review
  7. Evaluation of [EJNMMI research · 2024
    Article
  8. Article
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  10. Biomarker Methodologies: A NIMH Perspective.Advances in neurobiology · 2024
    Review
  11. SV2A PET imaging in human neurodegenerative diseases.Frontiers in aging neuroscience · 2024
    Review
  12. Article
  13. Review
  14. Article
  15. First-in-Human PET Imaging of [Molecular imaging · 2023
    Article
  16. Article
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  18. Review
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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

15 authors at 2 institutions in 1 country.

Chao ZhengPET Center, Department of Radiology and Biomedical Imaging, Yale School of Medicine, New Haven, CT, 06520, USA.
Daniel HoldenPET Center, Department of Radiology and Biomedical Imaging, Yale School of Medicine, New Haven, CT, 06520, USA.
Ming-Qiang ZhengPET Center, Department of Radiology and Biomedical Imaging, Yale School of Medicine, New Haven, CT, 06520, USA.
Richard PracittoPET Center, Department of Radiology and Biomedical Imaging, Yale School of Medicine, New Haven, CT, 06520, USA.
Kyle C WilcoxTranslational Imaging, AbbVie Inc, North Chicago, IL, 60064, USA.
Marcel LindemannPET Center, Department of Radiology and Biomedical Imaging, Yale School of Medicine, New Haven, CT, 06520, USA.
Zachary FelchnerPET Center, Department of Radiology and Biomedical Imaging, Yale School of Medicine, New Haven, CT, 06520, USA.
Li ZhangPET Center, Department of Radiology and Biomedical Imaging, Yale School of Medicine, New Haven, CT, 06520, USA.
Jie TongPET Center, Department of Radiology and Biomedical Imaging, Yale School of Medicine, New Haven, CT, 06520, USA.
Krista FowlesPET Center, Department of Radiology and Biomedical Imaging, Yale School of Medicine, New Haven, CT, 06520, USA.
Sjoerd J FinnemaTranslational Imaging, AbbVie Inc, North Chicago, IL, 60064, USA.
Nabeel NabulsiPET Center, Department of Radiology and Biomedical Imaging, Yale School of Medicine, New Haven, CT, 06520, USA.
Richard E CarsonPET Center, Department of Radiology and Biomedical Imaging, Yale School of Medicine, New Haven, CT, 06520, USA.
Yiyun HuangPET Center, Department of Radiology and Biomedical Imaging, Yale School of Medicine, New Haven, CT, 06520, USA.
Zhengxin CaiPET Center, Department of Radiology and Biomedical Imaging, Yale School of Medicine, New Haven, CT, 06520, USA. Jason.cai@yale.edu.ORCID http://orcid.org/0000-0002-2005-6760
AbbVie (United States) · USYale University · US

Funding

Development of Novel SV2A PET Agents for Early Detection of Alzheimers DiseaseR01AG058773 · NIA · YALE UNIVERSITY · PI CAI, ZHENGXIN · 2018 to 2020
$2.4M
NIA NIH HHS R01 AG058773NIA NIH HHS R01AG058773
6 · The paper itself

Abstract

purposeTo quantify the synaptic vesicle glycoprotein 2A (SV2A) changes in the whole central nervous system (CNS) under pathophysiological conditions, a high affinity SV2A PET radiotracer with improved in vivo stability is desirable to minimize the potential confounding effect of radiometabolites. The aim of this study was to develop such a PET tracer based on the molecular scaffold of UCB-A, and evaluate its pharmacokinetics, in vivo stability, specific binding, and nonspecific binding signals in nonhuman primate brains, in comparison with [

methodsThe racemic SDM-16 (4-(3,5-difluorophenyl)-1-((2-methyl-1H-imidazol-1-yl)methyl)pyrrolidin-2-one) and its two enantiomers were synthesized and assayed for in vitro binding affinities to human SV2A. We synthesized the enantiopure [

resultsSDM-16 was synthesized in 3 steps with 44% overall yield and has the highest affinity (K

conclusionWe have successfully synthesized a novel SV2A PET tracer [

Indexed as

Membrane GlycoproteinsSynaptic VesiclesAminoacridinesAnimalsBrainHumansPositron-Emission TomographyRadiopharmaceuticalsAminoacridinesMembrane GlycoproteinsRadiopharmaceuticalsSDMBrain imagingMetabolically stableNonhuman primatesPETSDM-16 [18F]SDM-16SV2A

Identifiers

PMID34761284
PMCPMC8940841
OpenAlexW3175628299

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

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.