Evidence map›Paper›PMID 34798903›Full record

ArticleAlzheimer's research & therapy2021

Serum zinc levels and in vivo beta-amyloid deposition in the human brain.

Jee Wook Kim, Min Soo Byun, Dahyun Yi, Jun Ho Lee, Min Jung Kim, Gijung Jung, Jun-Young Lee, Koung Mi Kang, Chul-Ho Sohn, Yun-Sang Lee and 3 more

Open access · goldAbstract read
In one paragraph

Article in Alzheimer's research & therapy, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers.

0numbers the graph read from it
0cells of the map it votes in
19citing papers in PubMed
2.3field-weighted citation impact, top 12% 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

19 citing papers in PubMed, 28 citations in OpenAlex.

  1. Article
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  5. Genes · 2025
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  15. Zinc: From Biological Functions to Therapeutic Potential.International journal of molecular sciences · 2023
    Review
  16. Nutritional metabolism and cerebral bioenergetics in Alzheimer's disease and related dementias.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2023
    Review
  17. Review
  18. Article
  19. 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

13 authors at 5 institutions in 3 countries.

Jee Wook KimDepartment of Neuropsychiatry, Hallym University Dongtan Sacred Heart Hospital, Hwaseong, Gyeonggi, 18450, Republic of Korea.
Min Soo ByunDepartment of Psychiatry, Pusan National University Yangsan Hospital, Yangsan, 50612, Republic of Korea.
Dahyun YiInstitute of Human Behavioral Medicine, Medical Research Center Seoul National University, Seoul, 03080, Republic of Korea.
Jun Ho LeeDepartment of Geriatric Psychiatry, National Center for Mental Health, Seoul, 04933, Republic of Korea.
Min Jung KimDepartment of Neuropsychiatry, Seoul National University Hospital, Seoul, 03080, Republic of Korea.
Gijung JungDepartment of Neuropsychiatry, Seoul National University Hospital, Seoul, 03080, Republic of Korea.
Jun-Young LeeDepartment of Neuropsychiatry, SMG-SNU Boramae Medical Center, Seoul, 07061, Republic of Korea.
Koung Mi KangDepartment of Radiology, Seoul National University Hospital, Seoul, 03080, Republic of Korea.
Chul-Ho SohnDepartment of Radiology, Seoul National University Hospital, Seoul, 03080, Republic of Korea.
Yun-Sang LeeDepartment of Nuclear Medicine, Seoul National University College of Medicine, Seoul, 03080, Republic of Korea.
Yu Kyeong KimDepartment of Nuclear Medicine, SMG-SNU Boramae Medical Center, Seoul, 07061, Republic of Korea.
Dong Young LeeInstitute of Human Behavioral Medicine, Medical Research Center Seoul National University, Seoul, 03080, Republic of Korea. selfpsy@snu.ac.kr.ORCID 0000-0001-8976-8320
KBASE Research Group
Seoul National University Hospital · KRSeoul National University · KRSNUH SMG-SNU Boramae Medical Center · KRHallym University · KRPusan National University Yangsan Hospital · KR

Funding

KBASE2: Korean Brain Aging Study, Longitudinal Endophenotypes and Systems BiologyU01AG072177 · NIA · INDIANA UNIVERSITY INDIANAPOLIS · PI LEE, DONG YOUNG, NHO, KWANGSIK TIMOTHY · 2021 to 2025
$11.2M
NIA NIH HHS U01 AG072177
6 · The paper itself

Abstract

backgroundDespite the known associations between zinc levels and Alzheimer's disease (AD) dementia and related cognitive impairment, the underlying neuropathological links remain poorly understood. We tested the hypothesis that serum zinc level is associated with cerebral beta-amyloid protein (Aβ) deposition. Additionally, we explored associations between serum zinc levels and other AD pathologies [i.e., tau deposition and AD-signature cerebral glucose metabolism (AD-CM)] and white matter hyperintensities (WMHs), which are measures of cerebrovascular injury.

methodsA total of 241 cognitively normal older adults between 55 and 90 years of age were enrolled. All the participants underwent comprehensive clinical assessments, serum zinc level measurement, and multimodal brain imaging, including Pittsburgh compound B-positron emission tomography (PET), AV-1451 PET, fluorodeoxyglucose (FDG)-PET, and magnetic resonance imaging. Zinc levels were stratified into three categories: < 80 μg/dL (low), 80 to 90 μg/dL (medium), and > 90 μg/dL (high).

resultsA low serum zinc level was significantly associated with increased Aβ retention. In addition, apolipoprotein E ε4 allele (APOE4) status moderated the association: the relationship between low zinc level and Aβ retention was significant only in APOE4 carriers. Although a low zinc level appeared to reduce AD-CM, the relationship became insignificant on sensitivity analysis including only individuals with no nutritional deficiency. The serum zinc level was associated with neither tau deposition nor the WMH volume.

conclusionsOur findings suggest that decreased serum zinc levels are associated with elevation of brain amyloid deposition. In terms of AD prevention, more attention needs to be paid to the role of zinc.

Indexed as

Alzheimer DiseaseBrainAgedAmyloid beta-PeptidesApolipoprotein E4HumansMagnetic Resonance ImagingPositron-Emission TomographyZincAmyloid beta-PeptidesApolipoprotein E4ZincAlzheimer’s diseaseAPOE4AβZinc

Identifiers

PMID34798903
PMCPMC8605596
OpenAlexW3210618397

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.