Distinct Brain Regions in Physiological and Pathological Brain Aging

Studying structural brain aging is important to understand age-related pathologies, as well as to identify the early manifestations of the Alzheimer's disease (AD) continuum. In this study, we investigated the long-term trajectory of physiological and pathological brain aging in a large number...

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Published inFrontiers in aging neuroscience Vol. 11; p. 147
Main Authors Lee, Jin San, Park, Yu Hyun, Park, Seongbeom, Yoon, Uicheul, Choe, Yeongsim, Cheon, Bo Kyoung, Hahn, Alice, Cho, Soo Hyun, Kim, Seung Joo, Kim, Jun Pyo, Jung, Young Hee, Park, Key-Chung, Kim, Hee Jin, Jang, Hyemin, Seo, Sang Won
Format Journal Article
LanguageEnglish
Published Switzerland Frontiers Research Foundation 18.06.2019
Frontiers Media S.A
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ISSN1663-4365
1663-4365
DOI10.3389/fnagi.2019.00147

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Abstract Studying structural brain aging is important to understand age-related pathologies, as well as to identify the early manifestations of the Alzheimer's disease (AD) continuum. In this study, we investigated the long-term trajectory of physiological and pathological brain aging in a large number of participants ranging from the 50s to over 80 years of age. To explore the distinct brain regions that distinguish pathological brain aging from physiological brain aging using sophisticated measurements of cortical thickness. A total of 2,823 cognitively normal (CN) individuals and 2,675 patients with AD continuum [874 with subjective memory impairment (SMI), 954 with amnestic mild cognitive impairment (aMCI), and 847 with AD dementia] who underwent a high-resolution 3.0-tesla MRI were included in this study. To investigate pathological brain aging, we further classified patients with aMCI and AD according to the severity of cognitive impairment. Cortical thickness was measured using a surface-based method. Multiple linear regression analyses were performed to evaluate age, diagnostic groups, and cortical thickness. Aging extensively affected cortical thickness not only in CN individuals but also in AD continuum patients; however, the precuneus and inferior temporal regions were relatively preserved against age-related cortical thinning. Compared to CN individuals, AD continuum patients including those with SMI showed a decreased cortical thickness in the perisylvian region. However, widespread cortical thinning including the precuneus and inferior temporal regions were found from the late-stage aMCI to the moderate to severe AD. Unlike the other age groups, AD continuum patients aged over 80 years showed prominent cortical thinning in the medial temporal region with relative sparing of the precuneus. Our findings suggested that the precuneus and inferior temporal regions are the key regions in distinguishing between physiological and pathological brain aging. Attempts to differentiate age-related pathology from physiological brain aging at a very early stage would be important in terms of establishing new strategies for preventing accelerated pathological brain aging.
AbstractList BackgroundStudying structural brain aging is important to understand age-related pathologies, as well as to identify the early manifestations of the Alzheimer’s disease (AD) continuum. In this study, we investigated the long-term trajectory of physiological and pathological brain aging in a large number of participants ranging from the 50s to over 80 years of age.ObjectiveTo explore the distinct brain regions that distinguish pathological brain aging from physiological brain aging using sophisticated measurements of cortical thickness.MethodsA total of 2,823 cognitively normal (CN) individuals and 2,675 patients with AD continuum [874 with subjective memory impairment (SMI), 954 with amnestic mild cognitive impairment (aMCI), and 847 with AD dementia] who underwent a high-resolution 3.0-tesla MRI were included in this study. To investigate pathological brain aging, we further classified patients with aMCI and AD according to the severity of cognitive impairment. Cortical thickness was measured using a surface-based method. Multiple linear regression analyses were performed to evaluate age, diagnostic groups, and cortical thickness.ResultsAging extensively affected cortical thickness not only in CN individuals but also in AD continuum patients; however, the precuneus and inferior temporal regions were relatively preserved against age-related cortical thinning. Compared to CN individuals, AD continuum patients including those with SMI showed a decreased cortical thickness in the perisylvian region. However, widespread cortical thinning including the precuneus and inferior temporal regions were found from the late-stage aMCI to the moderate to severe AD. Unlike the other age groups, AD continuum patients aged over 80 years showed prominent cortical thinning in the medial temporal region with relative sparing of the precuneus.ConclusionOur findings suggested that the precuneus and inferior temporal regions are the key regions in distinguishing between physiological and pathological brain aging. Attempts to differentiate age-related pathology from physiological brain aging at a very early stage would be important in terms of establishing new strategies for preventing accelerated pathological brain aging.
Studying structural brain aging is important to understand age-related pathologies, as well as to identify the early manifestations of the Alzheimer's disease (AD) continuum. In this study, we investigated the long-term trajectory of physiological and pathological brain aging in a large number of participants ranging from the 50s to over 80 years of age.BACKGROUNDStudying structural brain aging is important to understand age-related pathologies, as well as to identify the early manifestations of the Alzheimer's disease (AD) continuum. In this study, we investigated the long-term trajectory of physiological and pathological brain aging in a large number of participants ranging from the 50s to over 80 years of age.To explore the distinct brain regions that distinguish pathological brain aging from physiological brain aging using sophisticated measurements of cortical thickness.OBJECTIVETo explore the distinct brain regions that distinguish pathological brain aging from physiological brain aging using sophisticated measurements of cortical thickness.A total of 2,823 cognitively normal (CN) individuals and 2,675 patients with AD continuum [874 with subjective memory impairment (SMI), 954 with amnestic mild cognitive impairment (aMCI), and 847 with AD dementia] who underwent a high-resolution 3.0-tesla MRI were included in this study. To investigate pathological brain aging, we further classified patients with aMCI and AD according to the severity of cognitive impairment. Cortical thickness was measured using a surface-based method. Multiple linear regression analyses were performed to evaluate age, diagnostic groups, and cortical thickness.METHODSA total of 2,823 cognitively normal (CN) individuals and 2,675 patients with AD continuum [874 with subjective memory impairment (SMI), 954 with amnestic mild cognitive impairment (aMCI), and 847 with AD dementia] who underwent a high-resolution 3.0-tesla MRI were included in this study. To investigate pathological brain aging, we further classified patients with aMCI and AD according to the severity of cognitive impairment. Cortical thickness was measured using a surface-based method. Multiple linear regression analyses were performed to evaluate age, diagnostic groups, and cortical thickness.Aging extensively affected cortical thickness not only in CN individuals but also in AD continuum patients; however, the precuneus and inferior temporal regions were relatively preserved against age-related cortical thinning. Compared to CN individuals, AD continuum patients including those with SMI showed a decreased cortical thickness in the perisylvian region. However, widespread cortical thinning including the precuneus and inferior temporal regions were found from the late-stage aMCI to the moderate to severe AD. Unlike the other age groups, AD continuum patients aged over 80 years showed prominent cortical thinning in the medial temporal region with relative sparing of the precuneus.RESULTSAging extensively affected cortical thickness not only in CN individuals but also in AD continuum patients; however, the precuneus and inferior temporal regions were relatively preserved against age-related cortical thinning. Compared to CN individuals, AD continuum patients including those with SMI showed a decreased cortical thickness in the perisylvian region. However, widespread cortical thinning including the precuneus and inferior temporal regions were found from the late-stage aMCI to the moderate to severe AD. Unlike the other age groups, AD continuum patients aged over 80 years showed prominent cortical thinning in the medial temporal region with relative sparing of the precuneus.Our findings suggested that the precuneus and inferior temporal regions are the key regions in distinguishing between physiological and pathological brain aging. Attempts to differentiate age-related pathology from physiological brain aging at a very early stage would be important in terms of establishing new strategies for preventing accelerated pathological brain aging.CONCLUSIONOur findings suggested that the precuneus and inferior temporal regions are the key regions in distinguishing between physiological and pathological brain aging. Attempts to differentiate age-related pathology from physiological brain aging at a very early stage would be important in terms of establishing new strategies for preventing accelerated pathological brain aging.
Background: Studying structural brain aging is important to understand age-related pathologies, as well as to identify the early manifestations of the Alzheimer’s disease (AD) continuum. In this study, we investigated the long-term trajectory of physiological and pathological brain aging in a large number of participants ranging from the 50s to over 80 years of age. Objective: To explore the distinct brain regions that distinguish pathological brain aging from physiological brain aging using sophisticated measurements of cortical thickness. Methods: A total of 2,823 cognitively normal (CN) individuals and 2,675 patients with AD continuum (874 with subjective memory impairments [SMI], 954 with amnestic mild cognitive impairments [aMCI], and 847 with AD dementia) who underwent a high-resolution 3.0-tesla MRI were included in this study. To investigate pathological brain aging, we further classified patients with aMCI and AD according to the severity of cognitive impairment. Cortical thickness was measured using a surface-based method. Multiple linear regression analyses were performed to evaluate age, diagnostic groups, and cortical thickness. Results: Aging extensively affected cortical thickness not only in CN individuals but also in AD continuum patients; however, the precuneus and inferior temporal regions were relatively preserved against age-related cortical thinning. Compared to CN individuals, AD continuum patients including those with SMI showed a decreased cortical thickness in the perisylvian region. However, widespread cortical thinning including the precuneus and inferior temporal regions were found from the late-stage aMCI to the moderate to severe AD. Unlike the other age groups, AD continuum patients aged over 80 years showed prominent cortical thinning in the medial temporal region with relative sparing of the precuneus. Conclusion: Our findings suggested that the precuneus and inferior temporal regions are the key regions in distinguishing between physiological and pathological brain aging. Attempts to differentiate age-related pathology from physiological brain aging at a very early stage would be important in terms of establishing new strategies for preventing accelerated pathological brain aging.
Studying structural brain aging is important to understand age-related pathologies, as well as to identify the early manifestations of the Alzheimer's disease (AD) continuum. In this study, we investigated the long-term trajectory of physiological and pathological brain aging in a large number of participants ranging from the 50s to over 80 years of age. To explore the distinct brain regions that distinguish pathological brain aging from physiological brain aging using sophisticated measurements of cortical thickness. A total of 2,823 cognitively normal (CN) individuals and 2,675 patients with AD continuum [874 with subjective memory impairment (SMI), 954 with amnestic mild cognitive impairment (aMCI), and 847 with AD dementia] who underwent a high-resolution 3.0-tesla MRI were included in this study. To investigate pathological brain aging, we further classified patients with aMCI and AD according to the severity of cognitive impairment. Cortical thickness was measured using a surface-based method. Multiple linear regression analyses were performed to evaluate age, diagnostic groups, and cortical thickness. Aging extensively affected cortical thickness not only in CN individuals but also in AD continuum patients; however, the precuneus and inferior temporal regions were relatively preserved against age-related cortical thinning. Compared to CN individuals, AD continuum patients including those with SMI showed a decreased cortical thickness in the perisylvian region. However, widespread cortical thinning including the precuneus and inferior temporal regions were found from the late-stage aMCI to the moderate to severe AD. Unlike the other age groups, AD continuum patients aged over 80 years showed prominent cortical thinning in the medial temporal region with relative sparing of the precuneus. Our findings suggested that the precuneus and inferior temporal regions are the key regions in distinguishing between physiological and pathological brain aging. Attempts to differentiate age-related pathology from physiological brain aging at a very early stage would be important in terms of establishing new strategies for preventing accelerated pathological brain aging.
Author Park, Seongbeom
Cho, Soo Hyun
Hahn, Alice
Kim, Seung Joo
Jung, Young Hee
Kim, Hee Jin
Jang, Hyemin
Yoon, Uicheul
Park, Key-Chung
Choe, Yeongsim
Cheon, Bo Kyoung
Seo, Sang Won
Park, Yu Hyun
Lee, Jin San
Kim, Jun Pyo
AuthorAffiliation 2 Neuroscience Center, Samsung Medical Center , Seoul , South Korea
4 Department of Biomedical Engineering, Daegu Catholic University , Gyeongsan , South Korea
7 Samsung Alzheimer Research Center, Center for Clinical Epidemiology, Samsung Medical Center , Seoul , South Korea
1 Department of Neurology, Samsung Medical Center, Sungkyunkwan University School of Medicine , Seoul , South Korea
8 Department of Health Sciences and Technology, Clinical Research Design and Evaluation, SAIHST, Sungkyunkwan University , Seoul , South Korea
5 Department of Neurology, Chonnam National University Medical School , Gwangju , South Korea
6 Department of Neurology, Gyeongsang National University School of Medicine and Gyeongsang National University Changwon Hospital , Changwon , South Korea
3 Department of Neurology, Kyung Hee University Hospital , Seoul , South Korea
AuthorAffiliation_xml – name: 3 Department of Neurology, Kyung Hee University Hospital , Seoul , South Korea
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– name: 1 Department of Neurology, Samsung Medical Center, Sungkyunkwan University School of Medicine , Seoul , South Korea
– name: 6 Department of Neurology, Gyeongsang National University School of Medicine and Gyeongsang National University Changwon Hospital , Changwon , South Korea
– name: 7 Samsung Alzheimer Research Center, Center for Clinical Epidemiology, Samsung Medical Center , Seoul , South Korea
– name: 2 Neuroscience Center, Samsung Medical Center , Seoul , South Korea
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BackLink https://www.ncbi.nlm.nih.gov/pubmed/31275140$$D View this record in MEDLINE/PubMed
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Copyright © 2019 Lee, Park, Park, Yoon, Choe, Cheon, Hahn, Cho, Kim, Kim, Jung, Park, Kim, Jang, Na and Seo. 2019 Lee, Park, Park, Yoon, Choe, Cheon, Hahn, Cho, Kim, Kim, Jung, Park, Kim, Jang, Na and Seo
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Keywords pathological brain aging
inferior temporal region
physiological brain aging
Alzheimer’s disease
precuneus
cortical thickness
Language English
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Edited by: Franca Rosa Guerini, Fondazione Don Carlo Gnocchi Onlus (IRCCS), Italy
Reviewed by: Can Sheng, Tsinghua University, China; Valeria Blasi, Fondazione Don Carlo Gnocchi Onlus (IRCCS), Italy
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PublicationTitle Frontiers in aging neuroscience
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Snippet Studying structural brain aging is important to understand age-related pathologies, as well as to identify the early manifestations of the Alzheimer's disease...
Background: Studying structural brain aging is important to understand age-related pathologies, as well as to identify the early manifestations of the...
BackgroundStudying structural brain aging is important to understand age-related pathologies, as well as to identify the early manifestations of the...
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SubjectTerms Age
Aging
Alzheimer's disease
Atrophy
Brain research
Cognitive ability
Cortex (parietal)
cortical thickness
Dementia
Dementia disorders
Education
inferior temporal region
Magnetic resonance imaging
Medical imaging
Medical screening
Memory
Neurology
Neuroscience
Older people
pathological brain aging
Pathology
physiological brain aging
Physiology
precuneus
Thinning
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Title Distinct Brain Regions in Physiological and Pathological Brain Aging
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