Evidence map›Paper›PMID 24337112›Full record

ArticleEukaryotic cell2014

Role of the Apt1 protein in polysaccharide secretion by Cryptococcus neoformans.

Juliana Rizzo, Débora L Oliveira, Luna S Joffe, Guanggan Hu, Felipe Gazos-Lopes, Fernanda L Fonseca, Igor C Almeida, Susana Frases, James W Kronstad, Marcio L Rodrigues

Open access · diamondAbstract read
In one paragraph

Article in Eukaryotic cell, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 51 papers.

0numbers the graph read from it
0cells of the map it votes in
51citing papers in PubMed
2.0field-weighted citation impact, top 14% 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

51 citing papers in PubMed, 77 citations in OpenAlex.

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  15. Review
  16. Functional Analysis of the P-Type ATPases Apt2-4 fromJournal of fungi (Basel, Switzerland) · 2023
    Article
  17. Extracellular vesicles in phytopathogenic fungi.Extracellular vesicles and circulating nucleic acids · 2023
    Review
  18. Review
  19. Lipid Transport byInfection and immunity · 2022
    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

10 authors at 5 institutions in 3 countries.

Juliana RizzoInstituto de Microbiologia Professor Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil.
Débora L OliveiraMichael Smith Laboratories, Department of Microbiology and Immunology, Faculty of Land and Food Systems, The University of British Columbia, Vancouver, Canada.
Luna S JoffeInstituto de Microbiologia Professor Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil.
Guanggan HuMichael Smith Laboratories, Department of Microbiology and Immunology, Faculty of Land and Food Systems, The University of British Columbia, Vancouver, Canada.
Felipe Gazos-LopesBorder Biomedical Research Center, Department of Biological Sciences, The University of Texas at El Paso, El Paso, Texas, USA.
Fernanda L FonsecaInstituto de Microbiologia Professor Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil Centro de Desenvolvimento Tecnológico em Saúde (CDTS), Fundação Oswaldo Cruz, Rio de Janeiro, Brazil.
Igor C AlmeidaBorder Biomedical Research Center, Department of Biological Sciences, The University of Texas at El Paso, El Paso, Texas, USA.
Susana FrasesLaboratório de Ultraestrutura Celular Hertha Meyer, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil.
James W KronstadMichael Smith Laboratories, Department of Microbiology and Immunology, Faculty of Land and Food Systems, The University of British Columbia, Vancouver, Canada.
Marcio L RodriguesInstituto de Microbiologia Professor Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil Centro de Desenvolvimento Tecnológico em Saúde (CDTS), Fundação Oswaldo Cruz, Rio de Janeiro, Brazil marciolr@cdts.fiocruz.br.
Universidade Federal do Rio de Janeiro · BRThe University of Texas at El Paso · USUniversity of British Columbia · CACanada's Michael Smith Genome Sciences Centre · CAFundação Oswaldo Cruz · BR

Funding

TCCG12MD007592 · NIMHD · UNIVERSITY OF TEXAS EL PASO · PI KIRKEN, ROBERT A. · 2012 to 2018
$19.4M
CIHRNIMHD NIH HHS 8G12MD007592NIMHD NIH HHS G12 MD007592
6 · The paper itself

Abstract

Flippases are key regulators of membrane asymmetry and secretory mechanisms. Vesicular polysaccharide secretion is essential for the pathogenic mechanisms of Cryptococcus neoformans. On the basis of the observations that flippases are required for polysaccharide secretion in plants and the putative Apt1 flippase is required for cryptococcal virulence, we analyzed the role of this enzyme in polysaccharide release by C. neoformans, using a previously characterized apt1Δ mutant. Mutant and wild-type (WT) cells shared important phenotypic characteristics, including capsule morphology and dimensions, glucuronoxylomannan (GXM) composition, molecular size, and serological properties. The apt1Δ mutant, however, produced extracellular vesicles (EVs) with a lower GXM content and different size distribution in comparison with those of WT cells. Our data also suggested a defective intracellular GXM synthesis in mutant cells, in addition to changes in the architecture of the Golgi apparatus. These findings were correlated with diminished GXM production during in vitro growth, macrophage infection, and lung colonization. This phenotype was associated with decreased survival of the mutant in the lungs of infected mice, reduced induction of interleukin-6 (IL-6) cytokine levels, and inefficacy in colonization of the brain. Taken together, our results indicate that the lack of APT1 caused defects in both GXM synthesis and vesicular export to the extracellular milieu by C. neoformans via processes that are apparently related to the pathogenic mechanisms used by this fungus during animal infection.

Indexed as

AnimalsCryptococcus neoformansFemaleFungal ProteinsGolgi ApparatusLungMiceMice, Inbred C57BLMutationPhospholipid Transfer ProteinsPolysaccharidesSecretory PathwaySecretory VesiclesVirulenceFungal ProteinsglucuronoxylomannanPhospholipid Transfer ProteinsPolysaccharides

Identifiers

PMID24337112
PMCPMC4054279
OpenAlexW2021319680

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.