Evidence map›Paper›PMID 21526230›Full record

ArticlePloS one2011

Non-esterified fatty acids generate distinct low-molecular weight amyloid-β (Aβ42) oligomers along pathway different from fibril formation.

Amit Kumar, Rebekah L Bullard, Pritesh Patel, Lea C Paslay, Dipti Singh, Ewa A Bienkiewicz, Sarah E Morgan, Vijayaraghavan Rangachari

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed
3.8field-weighted citation impact, top 7% 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

23 citing papers in PubMed, 54 citations in OpenAlex.

  1. Article
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  6. Biophysical characteristics of lipid-induced Aβ oligomers correlate to distinctive phenotypes in transgenic mice.FASEB journal : official publication of the Federation of American Societies for Experimental Biology · 2021
    Article
  7. Article
  8. Stability of Aβ-fibril fragments in the presence of fatty acids.Protein science : a publication of the Protein Society · 2019
    Article
  9. Article
  10. Review
  11. Article
  12. Article
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  17. Article
  18. Dopamine-induced α-synuclein oligomers show self- and cross-propagation properties.Protein science : a publication of the Protein Society · 2014
    Article
  19. Article
  20. Article
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

8 authors at 2 institutions in 1 country.

Amit KumarDepartment of Chemistry and Biochemistry, University of Southern Mississippi, Hattiesburg, Mississippi, United States of America.
Rebekah L Bullard
Pritesh Patel
Lea C Paslay
Dipti Singh
Ewa A Bienkiewicz
Sarah E Morgan
Vijayaraghavan Rangachari
University of Southern Mississippi · USFlorida State University · US

Funding

TOUGALOO PROTEOMICSP20RR016476 · NCRR · UNIVERSITY OF SOUTHERN MISSISSIPPI · PI SHEARER, GLEN · 2001 to 2011
$30.4M
NCRR NIH HHS P20 RR016476NCRR NIH HHS P20RR016476
6 · The paper itself

Abstract

Amyloid-β (Aβ) peptide aggregation is known to play a central role in the etiology of Alzheimer's disease (AD). Among various aggregates, low-molecular weight soluble oligomers of Aβ are increasingly believed to be the primary neurotoxic agents responsible for memory impairment. Anionic interfaces are known to influence the Aβ aggregation process significantly. Here, we report the effects of interfaces formed by medium-chain (C9-C12), saturated non-esterified fatty acids (NEFAs) on Aβ42 aggregation. NEFAs uniquely affected Aβ42 aggregation rates that depended on both the ratio of Aβ:NEFA as well the critical micelle concentration (CMC) of the NEFAs. More importantly, irrespective of the kind of NEFA used, we observed that two distinct oligomers, 12-18 mers and 4-5 mers were formed via different pathway of aggregation under specific experimental conditions: (i) 12-18 mers were generated near the CMC in which NEFAs augment the rate of Aβ42 aggregation towards fibril formation, and, (ii) 4-5 mers were formed above the CMC, where NEFAs inhibit fibril formation. The data indicated that both 12-18 mers and 4-5 mers are formed along an alternate pathway called 'off-pathway' that did not result in fibril formation and yet have subtle structural and morphological differences that distinguish their bulk molecular behavior. These observations, (i) reflect the possible mechanism of Aβ aggregation in physiological lipid-rich environments, and (ii) reiterate the fact that all oligomeric forms of Aβ need not be obligatory intermediates of the fibril formation pathway.

Indexed as

Amyloid beta-PeptidesBenzothiazolesBlotting, WesternCircular DichroismFatty Acids, NonesterifiedFluorescenceGuanidineMicellesModels, BiologicalMolecular WeightProtein DenaturationProtein Structure, QuaternaryProtein Structure, SecondaryThermodynamicsThiazolesAmyloid beta-PeptidesBenzothiazolesFatty Acids, NonesterifiedGuanidineMicellesThiazolesthioflavin T

Identifiers

PMID21526230
PMCPMC3079704
OpenAlexW1989773342

What OpenQuestion holds

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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.