Evidence map›Paper›PMID 29906288›Full record

ArticlePLoS pathogens2018

A MFS-like plasma membrane transporter required for Leishmania virulence protects the parasites from iron toxicity.

Maria Fernanda Laranjeira-Silva, Wanpeng Wang, Tamika K Samuel, Fernando Y Maeda, Vladimir Michailowsky, Iqbal Hamza, Zhongchi Liu, Norma W Andrews

Open access · goldAbstract read
In one paragraph

Article in PLoS pathogens, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
17citing papers in PubMed, 1 pooled it
4.7field-weighted citation impact, top 6% 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

17 citing papers in PubMed, 1 synthesis or guideline pooled it, 31 citations in OpenAlex.

  1. Pooled it
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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

8 authors at 2 institutions in 2 countries.

Maria Fernanda Laranjeira-SilvaDepartment of Cell Biology and Molecular Genetics, University of Maryland, College Park, Maryland, United States of America.ORCID 0000-0002-7128-6208
Wanpeng WangDepartment of Cell Biology and Molecular Genetics, University of Maryland, College Park, Maryland, United States of America.ORCID 0000-0001-9971-895X
Tamika K SamuelDepartment of Animal and Avian Sciences, University of Maryland, College Park, Maryland, United States of America.
Fernando Y MaedaDepartment of Cell Biology and Molecular Genetics, University of Maryland, College Park, Maryland, United States of America.
Vladimir MichailowskyDepartment of Cell Biology and Molecular Genetics, University of Maryland, College Park, Maryland, United States of America.
Iqbal HamzaDepartment of Animal and Avian Sciences, University of Maryland, College Park, Maryland, United States of America.
Zhongchi LiuDepartment of Cell Biology and Molecular Genetics, University of Maryland, College Park, Maryland, United States of America.ORCID 0000-0001-9969-9381
Norma W AndrewsDepartment of Cell Biology and Molecular Genetics, University of Maryland, College Park, Maryland, United States of America.ORCID 0000-0002-0611-2412
University of Maryland, College Park · USUniversidade Federal do Ceará · BR

Funding

Molecular Determinants of Intracellular Survival and Replication in LeishmaniaR01AI067979 · NIAID · YALE UNIVERSITY · PI ANDREWS, NORMA WINDSOR · 2007 to 2018
$3.8M
The Transport of Nutritional Heme in Animal DevelopmentR01DK085035 · NIDDK · UNIV OF MARYLAND, COLLEGE PARK · PI HAMZA, IQBAL · 2010 to 2019
$3.6M
NIAID NIH HHS R01 AI067979NIDDK NIH HHS R01 DK085035
6 · The paper itself

Abstract

Iron is essential for many cellular processes, but can generate highly toxic hydroxyl radicals in the presence of oxygen. Therefore, intracellular iron accumulation must be tightly regulated, by balancing uptake with storage or export. Iron uptake in Leishmania is mediated by the coordinated action of two plasma membrane proteins, the ferric iron reductase LFR1 and the ferrous iron transporter LIT1. However, how these parasites regulate their cytosolic iron concentration to prevent toxicity remains unknown. Here we characterize Leishmania Iron Regulator 1 (LIR1), an iron responsive protein with similarity to membrane transporters of the major facilitator superfamily (MFS) and plant nodulin-like proteins. LIR1 localizes on the plasma membrane of L. amazonensis promastigotes and intracellular amastigotes. After heterologous expression in Arabidopsis thaliana, LIR1 decreases the iron content of leaves and worsens the chlorotic phenotype of plants lacking the iron importer IRT1. Consistent with a role in iron efflux, LIR1 deficiency does not affect iron uptake by L. amazonensis but significantly increases the amount of iron retained intracellularly in the parasites. LIR1 null parasites are more sensitive to iron toxicity and have drastically impaired infectivity, phenotypes that are reversed by LIR1 complementation. We conclude that LIR1 functions as a plasma membrane iron exporter with a critical role in maintaining iron homeostasis and promoting infectivity in L. amazonensis.

Indexed as

AnimalsArabidopsisBiological TransportCell MembraneCells, CulturedFemaleHomeostasisIronLeishmaniaLeishmaniasisMacrophagesMiceMice, Inbred C57BLProtozoan ProteinsVirulenceIronProtozoan Proteins

Identifiers

PMID29906288
PMCPMC6021107
OpenAlexW2808391694

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.