Evidence map›Paper›PMID 22574751›Full record

ArticleMolecular pharmaceutics2012

Differences in the cellular uptake and intracellular itineraries of amyloid beta proteins 40 and 42: ramifications for the Alzheimer's drug discovery.

Rajesh S Omtri, Michael W Davidson, Balasubramaniam Arumugam, Joseph F Poduslo, Karunya K Kandimalla

Abstract read
In one paragraph

Article in Molecular pharmaceutics, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 35 papers.

0numbers the graph read from it
0cells of the map it votes in
35citing papers in PubMed
2.2field-weighted citation impact, top 13% 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

35 citing papers in PubMed, 63 citations in OpenAlex.

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  13. The Amyloid Cascade Hypothesis 2.0: Generalization of the Concept.Journal of Alzheimer's disease reports · 2023
    Article
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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

5 authors at 4 institutions in 2 countries.

Rajesh S OmtriDivision of Basic Pharmaceutical Sciences, Florida A&M University College of Pharmacy and Pharmaceutical Sciences, Tallahassee, Florida, United States.
Michael W Davidson
Balasubramaniam Arumugam
Joseph F Poduslo
Karunya K Kandimalla
Florida Agricultural and Mechanical University · USMayo Clinic · USNational High Magnetic Field Laboratory · USNIMS University · IN

Funding

THE PREVENTION OF B(A)P INDUCED CELL TRANSFORMATION BY ORGANOSULFUR COMPOUNDSG12RR003020 · NCRR · FLORIDA AGRICULTURAL AND MECHANICAL UNIV · PI SACHDEVA, MANDIP SINGH · 1985 to 2011
$29.7M
ZINC DIETARY ALTERATIONS OF CADMIUM INDUCED HEPATIC TOXICITY IN RATSS06GM008111 · NIGMS · FLORIDA AGRICULTURAL AND MECHANICAL UNIV · PI REAMS, ROMONIA RENEE · 1989 to 2008
$9.1M
Targeted Nanocarrier Combination Based Therapy for Lung CancerP20MD006738 · NIMHD · FLORIDA AGRICULTURAL AND MECHANICAL UNIV · PI SOLIMAN, KARAM F.A. · 2012 to 2016
$5.6M
NCRR NIH HHS G12 RR003020NCRR NIH HHS G12RR03020NIGMS NIH HHS S06 GM008111NIMHD NIH HHS P20 MD006738
6 · The paper itself

Abstract

Mounting evidence suggests that the pathological hallmarks of Alzheimer's disease (AD), neurofibrillary tangles and parenchymal amyloid plaques, are downstream reflections of neurodegeneration caused by the intraneuronal accumulation of amyloid-β proteins (Aβ), particularly Aβ42 and Aβ40. While the neurotoxicity of more amyloidogenic but less abundant Aβ42 is well documented, the effect of Aβ40 on neurons has been understudied. The Aβ40 expression in the presymptomatic AD brain is ten times greater than that of Aβ42. However, the Aβ40:42 ratio decreases with AD progression and coincides with increased amyloid plaque deposition in the brain. Hence, it is thought that Aβ40 protects neurons from the deleterious effects of Aβ42. The pathophysiological pathways involved in the neuronal uptake of Aβ40 or Aβ42 have not been clearly elucidated. Lack of such critical information obscures therapeutic targets and thwarts rational drug development strategies aimed at preventing neurodegeneration in AD. The current study has shown that fluorescein labeled Aβ42 (F-Aβ42) is internalized by neurons via dynamin dependent endocytosis and is sensitive to membrane cholesterol, whereas the neuronal uptake of F-Aβ40 is energy independent and nonendocytotic. Following their uptake, both F-Aβ40 and F-Aβ42 did not accumulate in early/recycling endosomes; F-Aβ42 but not F-Aβ40 accumulated in late endosomes and in the vesicles harboring caveolin-1. Furthermore, F-Aβ42 demonstrated robust accumulation in the lysosomes and damaged their integrity, whereas F-Aβ40 showed only a sparse lysosomal accumulation. Such regulated trafficking along distinct pathways suggests that Aβ40 and Aβ42 exercise differential effects on neurons. These differences must be carefully considered in the design of a pharmacological agent intended to block the neurodegeneration triggered by Aβ proteins.

Indexed as

Alzheimer DiseaseAmyloid beta-PeptidesAnimalsCaveolin 1Cell Line, TumorDrug DiscoveryEndocytosisEndosomesLysosomesNeuronsPC12 CellsPeptide FragmentsRatsAmyloid beta-Peptidesamyloid beta-protein (1-40)amyloid beta-protein (1-42)Caveolin 1Peptide Fragments

Identifiers

PMID22574751
PMCPMC3858471
OpenAlexW2074446821

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.