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PMID: 18544670 Published · ppublish English Journal Article Research Support, Non-U.S. Gov't

Morphometric changes in the episodic memory network and tau pathologic features correlate with memory performance in patients with mild cognitive impairment.

AJNR. American journal of neuroradiology ·Vol. 29 ·No. 6 ·2008-06-00 ·Pages 1183-9

Fjell AM, Walhovd KB, Amlien I, Bjørnerud A, Reinvang I, Gjerstad L, Cappelen T, Willoch F, Due-Tønnessen P, Grambaite R, Skinningsrud A, Stenset V, Fladby T

Abstract

Mild cognitive impairment (MCI) may affect several cognitive domains, including attention and reasoning, but is often first characterized by memory deficits. The purpose of this study was to ask these 2 questions: 1) Can levels of CSF tau proteins and amyloid beta 42 peptide explain thinning of the cerebral cortex in patients with MCI? 2) How are brain morphometry, CSF biomarkers, and apolipoprotein E (APOE) allelic variation related to episodic memory function in MCI? Hippocampal volume and cortical thickness were estimated by MR imaging and compared for patients with MCI (n = 18) and healthy controls (n = 18). In addition, regions of interest (ROIs) were selected in areas where the MCI group had atrophy and which overlapped with the episodic memory network (temporal, entorhinal, inferior parietal, precuneus/posterior cingulate, and frontal). Relationships among morphometry, CSF biomarkers, APOE, and memory were tested. The analyses were repeated with an independent sample of patients with MCI (n = 19). Patients with MCI and pathologic CSF values had hippocampal atrophy. However, both patients with pathologic and patients with nonpathologic CSF had a thinner cortex outside the hippocampal area. CSF pathology was related to hippocampal volume, whereas relationships with cortical thickness were found mainly in one of the samples. Morphometry correlated robustly with memory performance across MCI samples, whereas less stable results were found for tau protein. The differences in hippocampal volume between the MCI and the healthy control groups were only found in patients with pathologic CSF biomarkers, whereas differences in cortical thickness were also found for patients without such pathologic features. Morphometry in areas in the episodic memory network was robustly correlated with memory performance. It is speculated that atrophy in these areas may be associated with the memory problems seen in MCI.

MeSH Terms
Adult Aged Amyloid beta-Peptides/cerebrospinal fluid Cognition Disorders/cerebrospinal fluid,complications,diagnosis Female Hippocampus/pathology Humans Male Memory Memory Disorders/cerebrospinal fluid,complications,diagnosis Middle Aged Peptide Fragments/cerebrospinal fluid Reproducibility of Results Sensitivity and Specificity Statistics as Topic tau Proteins/cerebrospinal fluid
Chemicals
Amyloid beta-Peptides Peptide Fragments amyloid beta-protein (1-42) tau Proteins
Authors & Affiliations
13 authors, click to expand affiliations / ORCID
Fjell A M
Department of Psychology, University of Oslo, Oslo, Norway. [email protected]
Walhovd K B
Amlien I
Bjørnerud A
Reinvang I
Gjerstad L
Cappelen T
Willoch F
Due-Tønnessen P
Grambaite R
Skinningsrud A
Stenset V
Fladby T
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Article Info
Journal
AJNR. American journal of neuroradiology
Abbr.
AJNR Am J Neuroradiol
ISSN
1936-959X
Published
2008-06-00
Pages
1183-9
Language
English
Region
United States
NLM ID
8003708
PMCID
PMC8118812
Subset
IM
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