Evidence map›Paper›PMID 26503161›Full record

ArticleHuman brain mapping2016

Altered memory-related functional connectivity of the anterior and posterior hippocampus in older adults at increased genetic risk for Alzheimer's disease.

Theresa M Harrison, Alison C Burggren, Gary W Small, Susan Y Bookheimer

Abstract read
In one paragraph

Article in Human brain mapping, 2016. 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
2.5field-weighted citation impact, top 11% 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, 41 citations in OpenAlex.

  1. Article
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  5. Neurophysiological and Brain Structural Markers of Cognitive Frailty Differ from Alzheimer's Disease.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2022
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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

4 authors at 1 institution in 1 country.

Theresa M HarrisonNeuroscience Interdepartmental Graduate Program, UCLA, Los Angeles, California.
Alison C BurggrenDepartment of Psychiatry and Biobehavioral Sciences, UCLA, Los Angeles, California.
Gary W SmallDepartment of Psychiatry and Biobehavioral Sciences, UCLA, Los Angeles, California.
Susan Y BookheimerDepartment of Psychiatry and Biobehavioral Sciences, UCLA, Los Angeles, California.
Neurobehavioral Systems · US

Funding

VISUALIZING BRAIN A-BETA, TAU /SEROTONIN RECEPTOR DENSITP01AG025831 · NIA · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI SMALL, GARY WILLIAM · 2005 to 2010
$7.0M
FUNCTIONAL MRI FOR EARLY DIAGNOSIS OF ALZHEIMER'SR01AG013308 · NIA · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI BOOKHEIMER, SUSAN Y · 1995 to 2011
$4.5M
Effects of heavy adolescent cannabis use on brain morphology in agingK01DA034728 · NIDA · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI BURGGREN, ALISON CLEMENTS · 2013 to 2017
$776k
Beyond APOE: A Polygenic Approach to Risk for Alzheimer's Disease in HumansF31AG047041 · NIA · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI HARRISON, THERESA M. · 2014 to 2016
$96k
NIA NIH HHS 1F31AG047041NIA NIH HHS 5R01AG013308NIA NIH HHS F31 AG047041NIA NIH HHS P01 AG025831NIA NIH HHS R01 AG013308NIDA NIH HHS K01 DA034728
6 · The paper itself

Abstract

The hippocampal complex is affected early in Alzheimer's disease (AD). Increasingly, altered functional connectivity of the hippocampus is recognized as an important feature of preclinical AD. Carriers of the APOEɛ4 allele are at an increased risk for AD, which could lead to altered hippocampal connectivity even in healthy older adults. To test this hypothesis, we used a paired-associates memory task to examine differences in task-dependent functional connectivity of the anterior and posterior hippocampus in nondemented APOEɛ4 carriers (n = 34, 18F) and noncarriers (n = 46, 31F). We examined anterior and posterior portions of the hippocampus separately to test the theory that APOEɛ4-mediated differences would be more pronounced in the anterior region, which is affected earlier in the AD course. This study is the first to use a psychophysiological interaction approach to query the context-dependent connectivity of subregions of the hippocampus during a memory task in adults at increased genetic risk for AD. During encoding, APOEɛ4 carriers had lower functional connectivity change compared to baseline between the anterior hippocampus and right precuneus, anterior insula and cingulate cortex. During retrieval, bilateral supramarginal gyrus and right precuneus showed lower functional connectivity change with anterior hippocampus in carriers. Also during retrieval, carriers showed lower connectivity change in the posterior hippocampus with auditory cortex. In each case, APOEɛ4 carriers showed strong negative connectivity changes compared to noncarriers where positive connectivity change was measured. These differences may represent prodromal functional changes mediated in part by APOEɛ4 and are consistent with the anterior-to-posterior theory of AD progression in the hippocampus.

Indexed as

Alzheimer DiseaseAgedApolipoproteins EAuditory CortexBrain MappingDisease ProgressionFemaleGenotypeHippocampusHumansImage Processing, Computer-AssistedMagnetic Resonance ImagingMaleMemory DisordersMental RecallModels, NeurologicalApolipoproteins EagingAPOEconnectivityfMRIpreclinical Alzheimer's diseasepsychophysiological interaction

Identifiers

PMID26503161
PMCPMC4715627
OpenAlexW1878877305

What OpenQuestion holds

Textmetadata
LicenceTDM
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.