Cited by 21Dementia and Cognitive Impairment ResearchFunctional Brain Connectivity StudiesAlzheimer's disease research and treatments

Disrupted Brain Structural Connectivity: Pathological Interactions Between Genetic APOE ε4 Status and Developed MCI Condition

Ma, Chao, Wang, Jun, Zhang, Junying, Chen, Kewei, Li, Xin, Shu, Ni, Chen, Yaojing, Liu, Zhen +1 more·2017·Molecular Neurobiology

Abstract

The ε4 allele of the apolipoprotein E (APOE) gene and mild cognitive impairment (MCI) are both risk factors for Alzheimer's disease (AD). One factor is genetic, and the other is a developed condition during the aging process. The current study intended to discover the interactions of these two factors, which may be useful in the construction of a sensitive biomarker for early identification and intervention. Eight hundred eighty-five Chinese Han ethnic subjects (aged 55 and older) completed neuropsychological tests and APOE genotyping. One hundred ten of these participants underwent magnetic resonance imaging (MRI) for T1 structural and diffusion tensor imaging scans. Subjects were divided into four groups according to APOE ε4 carrying status and MCI condition: ε4+ MCI, ε4+ normal cognition (NC), ε4- MCI, and ε4- NC. In the studied Han population in Beijing, 16.9 % (ε2ε4 = 1.1 %, ε3ε4 = 14.8 %, and ε4ε4 = 0.9 %) carried at least one ε4 allele. Significant interactions between APOE ε4 and MCI were found in general cognitive function (p = 0.001) and white matter connectivity network (clustering coefficient, p = 0.004, and local efficiency, p = 0.011); the combination of ε4 positivity and MCI was accompanied by reductions in Mini-Mental Status Examination (MMSE) scores, global white matter network connectivity, and the right hippocampus (rHIP) nodal efficiency within that network (false discovery rate (FDR), p < 0.05). Our results suggest the presence of a genetic risk and MCI led to more severe pathological symptoms and could be informative in the implementation of clinical trials for early stages of AD.

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Crossref · 10.1007/s12035-016-0224-5

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  • Limited evidence suggests that APOE4 may drive accelerated hippocampal atrophy and network disruption with MCI, though others report no modifying effect of APOE4 on WM microstructure in MCI.

    “limited evidence suggests that APOE4 may drive accelerated hippocampal atrophy and network disruption with MCI [22], though others report no modifying effect of APOE4 on WM microstructure in MCI [23].”

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Authors
Ma, C., Wang, J., Zhang, J., Chen, K., Li, X., Shu, N., Chen, Y., Liu, Z., & Zhang, Z.
Affiliations
Beijing Normal University (CN)
Corresponding author
Zhang, Zhanjun
Venue
Molecular Neurobiology
Published
2016-10-26
Volume
54
Issue
9
Pages
6999-7007
ISSN
  • 0893-7648 (ISSN-L)
  • 1559-1182
OpenAlex
W2540828910
Cited by
21
References
57
Citations by year
2025: 1 · 2024: 5 · 2023: 1 · 2022: 3 · 2021: 4 · 2020: 5 · 2018: 2
FWCI
0.59
Type
journal article
Language
en
Open access
closed
Locations
  • Molecular Neurobiology (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Natural Science Foundation of China
Topics
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Functional Brain Connectivity Studies
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
Keywords
APOE ε4, mild cognitive impairment, Alzheimer's disease, structural brain connectivity, white matter networks, hippocampus, genetic risk, gene-environment interaction, diffusion tensor imaging, clustering coefficient, local efficiency, Han Chinese
MeSH terms
Aged, Brain, Female, Hippocampus, Humans, Male, Nerve Net, Neuropsychological Tests, Apolipoprotein E4, Cognitive Dysfunction, White Matter

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