Evidence map›Paper›PMID 19460323›Full record

ArticleInfection, genetics and evolution : journal of molecular epidemiology and evolutionary genetics in infectious diseases2009

Natural selection maintains a stable polymorphism at the circumsporozoite protein locus of Plasmodium falciparum in a low endemic area.

Chaturong Putaporntip, Somchai Jongwutiwes, Austin L Hughes

Abstract read
In one paragraph

Article in Infection, genetics and evolution : journal of molecular epidemiology and evolutionary genetics in infectious diseases, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.

0numbers the graph read from it
0cells of the map it votes in
13citing papers in PubMed
1.6field-weighted citation impact, top 15% 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

13 citing papers in PubMed, 17 citations in OpenAlex.

  1. Article
  2. Genetic variation of theFrontiers in parasitology · 2024
    Article
  3. Article
  4. Article
  5. Article
  6. Article
  7. Article
  8. Article
  9. Article
  10. Article
  11. Article
  12. Article
  13. Nucleotide sequence polymorphism at the apical membrane antigen-1 locus reveals population history of Plasmodium vivax in Thailand.Infection, genetics and evolution : journal of molecular epidemiology and evolutionary genetics in infectious diseases · 2009
    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

3 authors at 2 institutions in 2 countries.

Chaturong PutaporntipDepartment of Parasitology, Faculty of Medicine, Molecular Biology of Malaria and Opportunistic Parasites Research Unit, Chulalongkorn University, Bangkok, Thailand.
Somchai Jongwutiwes
Austin L Hughes
Chulalongkorn University · THUniversity of South Carolina · US

Funding

POLYMORPHISM &EVOLUTION OF MHC GENESR01GM043940 · NIGMS · UNIVERSITY OF TEXAS HLTH SCI CTR HOUSTON · PI HUGHES, AUSTIN L. · 1990 to 2010
$1.5M
NIGMS NIH HHS GM43940NIGMS NIH HHS R01 GM043940
6 · The paper itself

Abstract

Circumsporozoite protein gene sequences of Plasmodium falciparum were collected in 1996-1997 and in 2006-2007 from a single endemic area in Thailand. Repeat units were more similar within the same haplotype than between haplotypes, supporting the hypothesis that repeat arrays evolve by a process of concerted evolution. There was evidence that natural selection has favored amino acid changes in the Th2R and Th3R T-cell epitope regions. One haplotype in these epitopes, designated *5/*1, occurred in approximately 70% of sequences in both collection periods. The most common other haplotypes differed from *5/*1 by at least two amino acid replacements; and divergence in the epitopes was correlated with divergence in the repeats. These patterns are most consistent with balancing selection driven by interactions with the immune system of the vertebrate host, probably involving both T-cell recognition of the Th2R and Th3R epitopes and antibody responses to the repeats.

Indexed as

Genes, ProtozoanPolymorphism, GeneticSelection, GeneticAmino Acid SequenceAnimalsData Interpretation, StatisticalEndemic DiseasesEpitopes, T-LymphocyteEvolution, MolecularHaplotypesHumansMalaria, FalciparumPhylogenyPlasmodium falciparumProtozoan ProteinsRepetitive Sequences, Nucleic Acidcircumsporozoite protein, ProtozoanEpitopes, T-LymphocyteProtozoan Proteins

Identifiers

PMID19460323
PMCPMC4009382
OpenAlexW2170188519

What OpenQuestion holds

Textmetadata
LicenceTDM
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.