Evidence map›Paper›PMID 9712800›Full record

ArticleInfection and immunity1998

Early events in phagosome establishment are required for intracellular survival of Legionella pneumophila.

L A Wiater, K Dunn, F R Maxfield, H A Shuman

Open access · bronzeAbstract read
In one paragraph

Article in Infection and immunity, 1998. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 56 papers.

0numbers the graph read from it
0cells of the map it votes in
56citing papers in PubMed
7.6field-weighted citation impact, top 2% 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

56 citing papers in PubMed, 124 citations in OpenAlex.

  1. ACS infectious diseases · 2026
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  4. Interfering with Autophagy: The Opposing Strategies Deployed byFrontiers in cellular and infection microbiology · 2020
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  8. Beyond Paralogs: The Multiple Layers of Redundancy in Bacterial Pathogenesis.Frontiers in cellular and infection microbiology · 2017
    Review
  9. PilY1 PromotesFrontiers in cellular and infection microbiology · 2017
    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

4 authors at 1 institution in 1 country.

L A WiaterDepartments of Microbiology, College of Physicians and Surgeons, Columbia University, New York, New York 10032, USA.
K Dunn
F R Maxfield
H A Shuman
Columbia University · US

Funding

RECEPTOR-MEDIATED ENDOCYTOSIS: MECHANISM AND FUNCTIONR37DK027083 · NIDDK · WEILL MEDICAL COLL OF CORNELL UNIV · PI MAXFIELD, FREDERICK R. · 1993 to 2014
$6.5M
RECEPTOR-MEDIATED ENDOCYTOSIS: MECHANISM AND FUNCTIONR01DK027083 · NIDDK · WEILL MEDICAL COLLEGE OF CORNELL UNIV · PI MAXFIELD, FREDERICK R. · 1986 to 2004
$2.0M
NIAID NIH HHS AI-08299NIAID NIH HHS AI-2354NIDDK NIH HHS DK-27083NIDDK NIH HHS R01 DK027083NIDDK NIH HHS R37 DK027083
6 · The paper itself

Abstract

During infection, the Legionnaires' disease bacterium, Legionella pneumophila, survives and multiplies within a specialized phagosome that is near neutral pH and does not fuse with host lysosomes. In order to understand the molecular basis of this organism's ability to control its intracellular fate, we have isolated and characterized a group of transposon-generated mutants which were unable to kill macrophages and were subsequently found to be defective in intracellular multiplication. These mutations define a set of 20 genes (19 icm [for intracellular multiplication] genes and dotA [for defect in organelle trafficking]). In this report, we describe a quantitative assay for phagosome-lysosome fusion (PLF) and its use to measure the levels of PLF in cells that have been infected with either wild-type L. pneumophila or one of several mutants defective in different icm genes or dotA. By using quantitative confocal fluorescence microscopy, PLF could be scored on a per-bacterium basis by determining the extent to which fluorescein-labeled L. pneumophila colocalized with host lysosomes prelabeled with rhodamine-dextran. Remarkably, mutations in the six genes that were studied resulted in maximal levels of PLF as quickly as 30 min following infection. These results indicate that several, and possibly all, of the icm and dotA gene products act at an early step during phagosome establishment to determine whether L. pneumophila-containing phagosomes will fuse with lysosomes. Although not ruled out, subsequent activity of these gene products may not be necessary for successful intracellular replication.

Indexed as

HL-60 CellsHumansIntracellular FluidKineticsLegionella pneumophilaLysosomesMutationPhagosomesTumor Cells, Cultured

Identifiers

PMID9712800
PMCPMC108538
OpenAlexW2146950688

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.