Evidence map›Paper›PMID 32400950›Full record

ArticleAlzheimer's & dementia : the journal of the Alzheimer's Association2020

In vivo measurement of widespread synaptic loss in Alzheimer's disease with SV2A PET.

Adam P Mecca, Ming-Kai Chen, Ryan S O'Dell, Mika Naganawa, Takuya Toyonaga, Tyler A Godek, Joanna E Harris, Hugh H Bartlett, Wenzhen Zhao, Nabeel B Nabulsi and 6 more

Abstract read
In one paragraph

Article in Alzheimer's & dementia : the journal of the Alzheimer's Association, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 181 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
181citing papers in PubMed, 4 pooled it
–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

181 citing papers in PubMed, 4 syntheses or guidelines pooled it.

  1. Pooled it
  2. Pooled it
  3. Pooled it
  4. Pooled it
  5. ABBV-552 in patients with mild Alzheimer's disease: a randomized phase IIb trial.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2025
    Trial
  6. Trial
  7. Trial
  8. Changes in synaptic density in the subacute phase after ischemic stroke: AJournal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism · 2022
    Trial
  9. Article
  10. Genetic and molecular evidence linking CTSH to Alzheimer's disease pathophysiology.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2026
    Article
  11. Article
  12. Article
  13. Article
  14. Unveiling the procoagulant state in Alzheimer's disease: A novel PET imaging strategy.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2026
    Article
  15. Article
  16. Review
  17. Review
  18. Exploring synaptic density patterns in cerebral small vessel disease: insights from [European journal of nuclear medicine and molecular imaging · 2026
    Article
  19. Noninvasive Quantification of [Journal of nuclear medicine : official publication, Society of Nuclear Medicine · 2026
    Article
  20. Review

121 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

16 authors.

Adam P MeccaAlzheimer's Disease Research Unit, Yale University School of Medicine, New Haven, Connecticut.
Ming-Kai ChenDepartment of Radiology and Biomedical Imaging, Yale University School of Medicine, New Haven, Connecticut.
Ryan S O'DellAlzheimer's Disease Research Unit, Yale University School of Medicine, New Haven, Connecticut.
Mika NaganawaDepartment of Radiology and Biomedical Imaging, Yale University School of Medicine, New Haven, Connecticut.
Takuya ToyonagaDepartment of Radiology and Biomedical Imaging, Yale University School of Medicine, New Haven, Connecticut.
Tyler A GodekAlzheimer's Disease Research Unit, Yale University School of Medicine, New Haven, Connecticut.
Joanna E HarrisAlzheimer's Disease Research Unit, Yale University School of Medicine, New Haven, Connecticut.
Hugh H BartlettAlzheimer's Disease Research Unit, Yale University School of Medicine, New Haven, Connecticut.
Wenzhen ZhaoAlzheimer's Disease Research Unit, Yale University School of Medicine, New Haven, Connecticut.
Nabeel B NabulsiDepartment of Radiology and Biomedical Imaging, Yale University School of Medicine, New Haven, Connecticut.
Brent C Vander WykProgram on Aging, Yale University School of Medicine, New Haven, Connecticut.
Pradeep VarmaDepartment of Radiology and Biomedical Imaging, Yale University School of Medicine, New Haven, Connecticut.
Amy F T ArnstenDepartment of Neuroscience, Yale University School of Medicine, New Haven, Connecticut.
Yiyun HuangDepartment of Radiology and Biomedical Imaging, Yale University School of Medicine, New Haven, Connecticut.
Richard E CarsonDepartment of Radiology and Biomedical Imaging, Yale University School of Medicine, New Haven, Connecticut.
Christopher H van DyckAlzheimer's Disease Research Unit, Yale University School of Medicine, New Haven, Connecticut.

Funding

Yale Clinical and Translational Science Award (U Component)UL1TR001863 · NCATS · YALE UNIVERSITY · PI John H. Krystal, LUCILA OHNO-MACHADO · 2016 to 2026
$102.9M
Yale University Clinical and Translational Science Award ProgramUL1TR000142 · NCATS · YALE UNIVERSITY · PI SHERWIN, ROBERT S · 2012 to 2015
$31.8M
Yale Alzheimer Disease Research CenterP30AG066508 · NIA · YALE UNIVERSITY · PI Anita Juliane Huttner · 2020 to 2026
$30.2M
Yale Alzheimer Disease Research CenterP50AG047270 · NIA · YALE UNIVERSITY · PI MAROTTOLI, RICHARD · 2015 to 2019
$8.3M
Clinical Neuroscience Research Training Program in PsychiatryT32MH019961 · NIMH · YALE UNIVERSITY · PI Christopher John Pittenger · 1996 to 2026
$5.9M
PET Imaging of SV2A and Other Biomarkers in Alzheimer's DiseaseR01AG062276 · NIA · YALE UNIVERSITY · PI VAN DYCK, CHRISTOPHER H · 2018 to 2022
$5.5M
A Pilot Synaptic Vesicle Glycoprotein 2A (SV2A) PET Study to Evaluate the Effect of CT1812 Treatment on Synaptic Density in Subjects with Mild to Moderate Alzheimer's DiseaseRF1AG057553 · NIA · COGNITION THERAPEUTICS, INC. · PI CATALANO, SUSAN M · 2017 to 2020
$4.8M
Neighborhood Socioeconomic Contextual Disadvantage and Alzheimer's DiseaseRF1AG057784 · NIA · UNIVERSITY OF WISCONSIN-MADISON · PI BENDLIN, BARBARA BRIGITTA, KIND, AMY J. · 2017 to 2017
$3.8M
PET Imaging of Synaptic Density in Alzheimers DiseaseR01AG052560 · NIA · YALE UNIVERSITY · PI CARSON, RICHARD E., VAN DYCK, CHRISTOPHER H · 2017 to 2020
$3.2M
Investigation of molecular changes in mGluR5 and SV2A to study synaptic alterations in Alzheimer's disease using PET.K23AG057794 · NIA · YALE UNIVERSITY · PI MECCA, ADAM PETER · 2018 to 2022
$977k
NCATS NIH HHS UL1 TR000142NCATS NIH HHS UL1 TR001863NIA NIH HHS K23AG057784NIA NIH HHS K23 AG057794NIA NIH HHS P30 AG066508NIA NIH HHS P50 AG047270NIA NIH HHS P50AG047270NIA NIH HHS R01 AG052560NIA NIH HHS R01AG052560NIA NIH HHS R01 AG062276NIA NIH HHS R01AG062276NIA NIH HHS RF1 AG057553NIA NIH HHS RF1AG057553NIA NIH HHS RF1 AG057784NIMH NIH HHS T32 MH019961
6 · The paper itself

Abstract

introductionSynaptic loss is a robust and consistent pathology in Alzheimer's disease (AD) and the major structural correlate of cognitive impairment. Positron emission tomography (PET) imaging of synaptic vesicle glycoprotein 2A (SV2A) has emerged as a promising biomarker of synaptic density.

methodsWe measured SV2A binding in 34 participants with early AD and 19 cognitively normal (CN) participants using [

resultsWe observed widespread reductions of SV2A binding in medial temporal and neocortical brain regions in early AD compared to CN participants. These reductions were largely maintained after correction for volume loss and were more extensive than decreases in gray matter volume.

conclusionWe were able to measure widespread synaptic loss due to AD using [

Indexed as

AgedAged, 80 and overAlzheimer DiseaseBiomarkersBrainCognitive DysfunctionDisease ProgressionFemaleHumansMaleMembrane GlycoproteinsMiddle AgedNerve Tissue ProteinsNeuronsPositron-Emission TomographySynapsesBiomarkersMembrane GlycoproteinsNerve Tissue ProteinsSV2A protein, human[11C]UCB-J | PETAlzheimer's diseaseSV2Asynaptic density

Identifiers

PMID32400950
PMCPMC7383876

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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.