Evidence map›Paper›PMID 22947931›Full record

ArticleBiophysical journal2012

Two-step mechanism of membrane disruption by Aβ through membrane fragmentation and pore formation.

Michele F M Sciacca, Samuel A Kotler, Jeffrey R Brender, Jennifer Chen, Dong-kuk Lee, Ayyalusamy Ramamoorthy

Open access · bronzeAbstract read
In one paragraph

Article in Biophysical journal, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 147 papers.

0numbers the graph read from it
0cells of the map it votes in
147citing papers in PubMed
12.3field-weighted citation impact, top 1% 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

147 citing papers in PubMed, 358 citations in OpenAlex.

  1. Toxic mechanisms of amyloid oligomers and therapeutic strategies.Protein science : a publication of the Protein Society · 2026
    Review
  2. Membrane Pore Formation by Peptides Studied by Fluorescence Techniques.Methods in molecular biology (Clifton, N.J.) · 2026
    Article
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  5. Serotonergic Regulation in Alzheimer's Disease.International journal of molecular sciences · 2025
    Review
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87 more citing papers are in PubMed but not listed here.

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

6 authors at 2 institutions in 2 countries.

Michele F M SciaccaBiophysics, University of Michigan, Ann Arbor, Michigan, USA.
Samuel A Kotler
Jeffrey R Brender
Jennifer Chen
Dong-kuk Lee
Ayyalusamy Ramamoorthy
University of Michigan–Ann Arbor · USSeoul National University of Science and Technology · KR

Funding

Rapid and efficient production of functional Cytochrome P450 enzymatic complex foR01GM095640 · NIGMS · UNIVERSITY OF MICHIGAN AT ANN ARBOR · PI RAMAMOORTHY, AYYALUSAMY · 2010 to 2013
$1.3M
NIGMS NIH HHS GM095640NIGMS NIH HHS R01 GM095640
6 · The paper itself

Abstract

Disruption of cell membranes by Aβ is believed to be one of the key components of Aβ toxicity. However, the mechanism by which this occurs is not fully understood. Here, we demonstrate that membrane disruption by Aβ occurs by a two-step process, with the initial formation of ion-selective pores followed by nonspecific fragmentation of the lipid membrane during amyloid fiber formation. Immediately after the addition of freshly dissolved Aβ(1-40), defects form on the membrane that share many of the properties of Aβ channels originally reported from single-channel electrical recording, such as cation selectivity and the ability to be blockaded by zinc. By contrast, subsequent amyloid fiber formation on the surface of the membrane fragments the membrane in a way that is not cation selective and cannot be stopped by zinc ions. Moreover, we observed that the presence of ganglioside enhances both the initial pore formation and the fiber-dependent membrane fragmentation process. Whereas pore formation by freshly dissolved Aβ(1-40) is weakly observed in the absence of gangliosides, fiber-dependent membrane fragmentation can only be observed in their presence. These results provide insights into the toxicity of Aβ and may aid in the design of specific compounds to alleviate the neurodegeneration of Alzheimer's disease.

Indexed as

Protein MultimerizationAmyloid beta-PeptidesCell MembraneCell Membrane PermeabilityGangliosidesPeptide FragmentsPorosityProtein Structure, SecondarySolubilityZincAmyloid beta-Peptidesamyloid beta-protein (1-40)GangliosidesPeptide FragmentsZinc

Identifiers

PMID22947931
PMCPMC3443794
OpenAlexW2060914703

What OpenQuestion holds

Textmetadata
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.