Evidence map›Paper›PMID 24596418›Full record

ArticleBlood2014

Combinatorial effects of malaria season, iron deficiency, and inflammation determine plasma hepcidin concentration in African children.

Sarah H Atkinson, Andrew E Armitage, Shivani Khandwala, Tabitha W Mwangi, Sophie Uyoga, Philip A Bejon, Thomas N Williams, Andrew M Prentice, Hal Drakesmith

Abstract read
In one paragraph

Article in Blood, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 40 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
40citing papers in PubMed, 2 pooled it
4.5field-weighted citation impact, top 5% 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

40 citing papers in PubMed, 2 syntheses or guidelines pooled it, 67 citations in OpenAlex.

  1. Pooled it
  2. Iron Deficiency Is Associated With Reduced Levels of Plasmodium falciparum-specific Antibodies in African Children.Clinical infectious diseases : an official publication of the Infectious Diseases Society of America · 2021
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

9 authors at 6 institutions in 3 countries.

Sarah H AtkinsonDepartment of Paediatrics, Oxford University Hospitals, University of Oxford, Oxford, United Kingdom; Oxford University Clinical Academic Graduate School, Oxford, United Kingdom; Kenya Medical Research Institute/Wellcome Trust Research Programme, Centre of Geographic Medicine Research-Coast, Kilifi District Hospital, Kilifi, Kenya;
Andrew E ArmitageMedical Research Council Human Immunology Unit, Weatherall Institute of Molecular Medicine, University of Oxford, Oxford University Hospitals, United Kingdom;
Shivani KhandwalaKenya Medical Research Institute/Wellcome Trust Research Programme, Centre of Geographic Medicine Research-Coast, Kilifi District Hospital, Kilifi, Kenya; Medical Research Council Human Immunology Unit, Weatherall Institute of Molecular Medicine, University of Oxford, Oxford University Hospitals, United Kingdom;
Tabitha W MwangiKenya Medical Research Institute/Wellcome Trust Research Programme, Centre of Geographic Medicine Research-Coast, Kilifi District Hospital, Kilifi, Kenya;
Sophie UyogaKenya Medical Research Institute/Wellcome Trust Research Programme, Centre of Geographic Medicine Research-Coast, Kilifi District Hospital, Kilifi, Kenya;
Philip A BejonKenya Medical Research Institute/Wellcome Trust Research Programme, Centre of Geographic Medicine Research-Coast, Kilifi District Hospital, Kilifi, Kenya;
Thomas N WilliamsKenya Medical Research Institute/Wellcome Trust Research Programme, Centre of Geographic Medicine Research-Coast, Kilifi District Hospital, Kilifi, Kenya; Department of Medicine, Imperial College, London, United Kingdom;
Andrew M PrenticeMedical Research Council International Nutrition Group, London School of Hygiene and Tropical Medicine, London, United Kingdom; and Medical Research Council Keneba, Keneba, The Gambia.
Hal DrakesmithMedical Research Council Human Immunology Unit, Weatherall Institute of Molecular Medicine, University of Oxford, Oxford University Hospitals, United Kingdom;
Kenya Medical Research Institute · KEMedical Research Council · GBMRC Human Immunology Unit · GBMRC Unit the Gambia · GMOxford University Hospitals NHS Trust · GBUniversity of Oxford · GB

Funding

Arthritis Research UKBritish Heart FoundationMedical Research Council G0901149Medical Research Council MC_U123292699Medical Research Council MC_UU_12010/10Wellcome Trust 091758Wellcome Trust 092654
6 · The paper itself

Abstract

Hepcidin is the master regulatory hormone that governs iron homeostasis and has a role in innate immunity. Although hepcidin has been studied extensively in model systems, there is less information on hepcidin regulation in global health contexts where iron deficiency (ID), anemia, and high infectious burdens (including malaria) all coexist but fluctuate over time. We evaluated iron status, hepcidin levels, and determinants of hepcidin in 2 populations of rural children aged ≤8 years, in the Gambia and Kenya (total n = 848), at the start and end of a malaria season. Regression analyses and structural equation modeling demonstrated, for both populations, similar combinatorial effects of upregulating stimuli (iron stores and to a lesser extent inflammation) and downregulating stimuli (erythropoietic drive) on hepcidin levels. However, malaria season was also a significant factor and was associated with an altered balance of these opposing factors. Consistent with these changes, hepcidin levels were reduced whereas the prevalence of ID was increased at the end of the malaria season. More prevalent ID and lower hepcidin likely reflect an enhanced requirement for iron and an ability to efficiently absorb it at the end of the malaria season. These results, therefore, have implications for ID and malaria control programs.

Indexed as

Anemia, Iron-DeficiencyChildChild, PreschoolCross-Sectional StudiesFemaleGambiaHepcidinsHumansInflammationIronKenyaMalariaMaleSeasonsHepcidinsIron

Identifiers

PMID24596418
PMCPMC4046425
OpenAlexW2010020300

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.