Evidence map›Paper›PMID 14617814›Full record

ArticleMolecular biology of the cell2004

Fusion between phagosomes, early and late endosomes: a role for actin in fusion between late, but not early endocytic organelles.

Rune Kjeken, Morten Egeberg, Anja Habermann, Mark Kuehnel, Pascale Peyron, Matthias Floetenmeyer, Paul Walther, Andrea Jahraus, Hélène Defacque, Sergei A Kuznetsov and 1 more

Open access · greenAbstract read
In one paragraph

Article in Molecular biology of the cell, 2004. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 47 papers.

0numbers the graph read from it
0cells of the map it votes in
47citing papers in PubMed
2.6field-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

47 citing papers in PubMed, 110 citations in OpenAlex.

  1. Review
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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

11 authors at 3 institutions in 1 country.

Rune KjekenEuropean Molecular Biology Laboratory, D-69117 Heidelberg, Germany. kjeken@bio.uio.no
Morten Egeberg
Anja Habermann
Mark Kuehnel
Pascale Peyron
Matthias Floetenmeyer
Paul Walther
Andrea Jahraus
Hélène Defacque
Sergei A Kuznetsov
Gareth Griffiths
European Molecular Biology Laboratory · DEUniversität Ulm · DEUniversity of Rostock · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Actin is implicated in membrane fusion, but the precise mechanisms remain unclear. We showed earlier that membrane organelles catalyze the de novo assembly of F-actin that then facilitates the fusion between latex bead phagosomes and a mixture of early and late endocytic organelles. Here, we correlated the polymerization and organization of F-actin with phagosome and endocytic organelle fusion processes in vitro by using biochemistry and light and electron microscopy. When membrane organelles and cytosol were incubated at 37 degrees C with ATP, cytosolic actin polymerized rapidly and became organized into bundles and networks adjacent to membrane organelles. By 30-min incubation, a gel-like state was formed with little further polymerization of actin thereafter. Also during this time, the bulk of in vitro fusion events occurred between phagosomes/endocytic organelles. The fusion between latex bead phagosomes and late endocytic organelles, or between late endocytic organelles themselves was facilitated by actin, but we failed to detect any effect of perturbing F-actin polymerization on early endosome fusion. Consistent with this, late endosomes, like phagosomes, could nucleate F-actin, whereas early endosomes could not. We propose that actin assembled by phagosomes or late endocytic organelles can provide tracks for fusion-partner organelles to move vectorially toward them, via membrane-bound myosins, to facilitate fusion.

Indexed as

ActinsAdenosine TriphosphateAnimalsCells, CulturedCryoelectron MicroscopyCytoskeletonCytosolEndocytosisEndosomesMacrophagesMembrane FusionMiceMicroscopy, ConfocalModels, MolecularOrganellesPhagosomesActinsAdenosine TriphosphateThymosinThymosin beta(4)

Identifiers

PMID14617814
PMCPMC307552
OpenAlexW2163023329

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.