Evidence map›Paper›PMID 26844958›Full record

ArticleGenes and immunity2016

Red blood cell complement receptor one level varies with Knops blood group, α(+)thalassaemia and age among Kenyan children.

D H Opi, S Uyoga, E N Orori, T N Williams, J A Rowe

Open access · hybridAbstract readComment
In one paragraph

Article in Genes and immunity, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.

0numbers the graph read from it
0cells of the map it votes in
10citing papers in PubMed
1.4field-weighted citation impact, top 18% 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

10 citing papers in PubMed, 20 citations in OpenAlex.

  1. Article
  2. Blood group antigens and malaria susceptibility.Frontiers in cellular and infection microbiology · 2025
    Review
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

5 authors at 4 institutions in 2 countries.

D H OpiKenya Medical Research Institute-Wellcome Trust Research Programme, Kilifi, Kenya.
S UyogaKenya Medical Research Institute-Wellcome Trust Research Programme, Kilifi, Kenya.
E N OroriKenya Medical Research Institute-Wellcome Trust Research Programme, Kilifi, Kenya.
T N WilliamsKenya Medical Research Institute-Wellcome Trust Research Programme, Kilifi, Kenya.
J A RoweCentre for Immunity, Infection and Evolution, Institute of Immunology and Infection Research, School of Biological Sciences, University of Edinburgh, Edinburgh, UK.
Kenya Medical Research Institute · KECentre for Immunity, Infection and Evolution · GBSt Mary's Hospital · GBUniversity of Edinburgh · GB

Funding

Wellcome Trust 084226
6 · The paper itself

Abstract

Both the invasion of red blood cells (RBCs) by Plasmodium falciparum parasites and the sequestration of parasite-infected RBCs in the microvasculature are mediated in part by complement receptor one (CR1). RBC surface CR1 level can vary between individuals by more than 20-fold and may be associated with the risk of severe malaria. The factors that influence RBC CR1 level variation are poorly understood, particularly in African populations. We studied 3535 child residents of a malaria-endemic region of coastal Kenya and report, for the first time, that the CR1 Knops blood group alleles Sl2 and McC(b), and homozygous HbSS are positively associated with RBC CR1 level. Sickle cell trait and ABO blood group did not influence RBC CR1 level. We also confirm the previous observation that α(+)thalassaemia is associated with reduced RBC CR1 level, possibly due to small RBC volume, and that age-related changes in RBC CR1 expression occur throughout childhood. RBC CR1 level in malaria-endemic African populations is a complex phenotype influenced by multiple factors that should be taken into account in the design and interpretation of future studies on CR1 and malaria susceptibility.

Indexed as

Blood Group AntigensChildErythrocytesHumansKenyaMalaria, FalciparumPlasmodium falciparumReceptors, ComplementThalassemiaBlood Group AntigensReceptors, Complement

Identifiers

PMID26844958
PMCPMC4842007
OpenAlexW2262295180

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.