Evidence map›Paper›PMID 25671784›Full record

ArticlePLoS genetics2015

African glucose-6-phosphate dehydrogenase alleles associated with protection from severe malaria in heterozygous females in Tanzania.

Alphaxard Manjurano, Nuno Sepulveda, Behzad Nadjm, George Mtove, Hannah Wangai, Caroline Maxwell, Raimos Olomi, Hugh Reyburn, Eleanor M Riley, Christopher J Drakeley and 2 more

Open access · goldAbstract read
In one paragraph

Article in PLoS genetics, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 48 papers.

0numbers the graph read from it
0cells of the map it votes in
48citing papers in PubMed
16.7field-weighted citation impact, top 1% 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

48 citing papers in PubMed, 89 citations in OpenAlex.

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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

12 authors at 3 institutions in 3 countries.

Alphaxard ManjuranoJoint Malaria Programme, Kilimanjaro Christian Medical College, Moshi, Tanzania.
Nuno SepulvedaDepartment of Infection and Immunology, Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, United Kingdom.
Behzad NadjmJoint Malaria Programme, Kilimanjaro Christian Medical College, Moshi, Tanzania.
George MtoveJoint Malaria Programme, Kilimanjaro Christian Medical College, Moshi, Tanzania.
Hannah WangaiJoint Malaria Programme, Kilimanjaro Christian Medical College, Moshi, Tanzania.
Caroline MaxwellJoint Malaria Programme, Kilimanjaro Christian Medical College, Moshi, Tanzania.
Raimos OlomiJoint Malaria Programme, Kilimanjaro Christian Medical College, Moshi, Tanzania.
Hugh ReyburnJoint Malaria Programme, Kilimanjaro Christian Medical College, Moshi, Tanzania; Department of Infection and Immunology, Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, United Kingdom.
Eleanor M RileyJoint Malaria Programme, Kilimanjaro Christian Medical College, Moshi, Tanzania; Department of Infection and Immunology, Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, United Kingdom.
Christopher J DrakeleyJoint Malaria Programme, Kilimanjaro Christian Medical College, Moshi, Tanzania; Department of Infection and Immunology, Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, United Kingdom.
Taane G ClarkPathogen Molecular Biology Department, Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, United Kingdom; Department of Infectious Disease Epidemiology, Faculty of Epidemiology and Population Health, London School of Hygiene and Tropical Medicine, London, United Kingdom.
MalariaGEN Consortium
Christian Medical College & Hospital · INLondon School of Hygiene & Tropical Medicine · GBKilimanjaro Christian Medical Centre · TZ

Funding

Medical Research Council G0600230Medical Research Council G0600718Medical Research Council G9901439Medical Research Council MR/K000551/1Medical Research Council MR/M006212/1Wellcome Trust 077012/Z/05/ZWellcome Trust 089276Wellcome Trust 090532/Z/09/ZWellcome Trust 090770/Z/09/ZWellcome Trust WT077383/Z/05/Z
6 · The paper itself

Abstract

X-linked Glucose-6-phosphate dehydrogenase (G6PD) A- deficiency is prevalent in sub-Saharan Africa populations, and has been associated with protection from severe malaria. Whether females and/or males are protected by G6PD deficiency is uncertain, due in part to G6PD and malaria phenotypic complexity and misclassification. Almost all large association studies have genotyped a limited number of G6PD SNPs (e.g. G6PD202 / G6PD376), and this approach has been too blunt to capture the complete epidemiological picture. Here we have identified 68 G6PD polymorphisms and analysed 29 of these (i.e. those with a minor allele frequency greater than 1%) in 983 severe malaria cases and controls in Tanzania. We establish, across a number of SNPs including G6PD376, that only female heterozygotes are protected from severe malaria. Haplotype analysis reveals the G6PD locus to be under balancing selection, suggesting a mechanism of protection relying on alleles at modest frequency and avoiding fixation, where protection provided by G6PD deficiency against severe malaria is offset by increased risk of life-threatening complications. Our study also demonstrates that the much-needed large-scale studies of severe malaria and G6PD enzymatic function across African populations require the identification and analysis of the full repertoire of G6PD genetic markers.

Indexed as

Selection, GeneticAllelesChildChild, PreschoolChromosomes, Human, XFemaleGene FrequencyGenetic MarkersGenetics, PopulationGlucosephosphate DehydrogenaseHaplotypesHeterozygoteHumansInfantMalariaMaleGenetic MarkersGlucosephosphate Dehydrogenase

Identifiers

PMID25671784
PMCPMC4335500
OpenAlexW2150112674

What OpenQuestion holds

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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.