Evidence map›Paper›PMID 30518419›Full record

ArticleParasites & vectors2018

Genetic polymorphism and natural selection in the C-terminal 42 kDa region of merozoite surface protein-1 (MSP-1) among Plasmodium knowlesi samples from Malaysia.

Nan Jiun Yap, Indra Vythilingam, Boon Peng Hoh, Xiang Ting Goh, Azdayanti Muslim, Romano Ngui, Yamuna Rajoo, Seow Huey Choy, Timothy William, Tsin Wen Yeo and 1 more

Open access · goldAbstract read
In one paragraph

Article in Parasites & vectors, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
8citing papers in PubMed, 1 pooled it
0.7field-weighted citation impact, top 24% 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

8 citing papers in PubMed, 1 synthesis or guideline pooled it, 9 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Article
  4. Inter-Population Genetic Diversity and Clustering ofTropical medicine and infectious disease · 2023
    Article
  5. Review
  6. Article
  7. Article
  8. Association Between Ghrelin Gene Polymorphism and Cerebral Infarction.Medical science monitor : international medical journal of experimental and clinical research · 2020
    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

11 authors at 5 institutions in 2 countries.

Nan Jiun YapDepartment of Parasitology, Faculty of Medicine, University of Malaya, 50603, Kuala Lumpur, Malaysia.
Indra VythilingamDepartment of Parasitology, Faculty of Medicine, University of Malaya, 50603, Kuala Lumpur, Malaysia.
Boon Peng HohFaculty of Medicine & Health Sciences, UCSI University Kuala Lumpur Campus, Cheras, Kuala Lumpur, Malaysia.
Xiang Ting GohDepartment of Parasitology, Faculty of Medicine, University of Malaya, 50603, Kuala Lumpur, Malaysia.
Azdayanti MuslimDepartment of Parasitology, Faculty of Medicine, University of Malaya, 50603, Kuala Lumpur, Malaysia.
Romano NguiDepartment of Parasitology, Faculty of Medicine, University of Malaya, 50603, Kuala Lumpur, Malaysia.
Yamuna RajooDepartment of Parasitology, Faculty of Medicine, University of Malaya, 50603, Kuala Lumpur, Malaysia.
Seow Huey ChoyDepartment of Parasitology, Faculty of Medicine, University of Malaya, 50603, Kuala Lumpur, Malaysia.
Timothy WilliamJesselton Medical Centre, 88300, Kota Kinabalu, Sabah, Malaysia.
Tsin Wen YeoCommunicable Diseases Centre, Institute of Infectious Disease and Epidemiology, Tan Tock Seng Hospital, Moulmein Road, Singapore, 308433, Singapore.
Yvonne Ai-Lian LimDepartment of Parasitology, Faculty of Medicine, University of Malaya, 50603, Kuala Lumpur, Malaysia. limailian@um.edu.my.
University of Malaya · MYHospital Sungai Buloh · MYInternational Medical University · MYTan Tock Seng Hospital · SGUCSI University · MY

Funding

Comparative incidence and clinical spectrum of Plasmodium knowlesi malaria, a longitudinal study in Sabah, MalaysiaR01AI116472 · NIAID · INFECTIOUS DISEASE SOCIETY KOTA KINABALU · PI WILLIAM, TIMOTHY · 2015 to 2019
$682k
Institut Pengurusan dan Pemantauan Penyelidikan, Universiti Malaya PG056-2013AInstitut Pengurusan dan Pemantauan Penyelidikan, Universiti Malaya RG503-13HTMMinistry of Higher Education Malaysia 600-RMI/FRGS 5/3 (136/2014)Ministry of Higher Education Malaysia FRGS/1/2015/ST03/UCSI/01/1NIAID NIH HHS R01 AI116472
6 · The paper itself

Abstract

backgroundThe merozoite surface protein-1 (MSP-1) gene encodes for a leading malaria vaccine candidate antigen. However, its extensive polymorphic nature represents a major obstacle to the development of a protective vaccine. Previously, a pilot study was carried out to explore the sequence variation of the C-terminal 42 kDa fragment within P. knowlesi MSP-1 gene (PkMSP-1

methodsIn the present study, we included a larger sample size of P. knowlesi (83 samples) covering eight states of Malaysia to determine the genetic polymorphism, natural selection and haplotype groups of the gene fragment coding PkMSP-1

resultsA high level of genetic diversity (Hd = 0.970 ± 0.007; л = 0.01079 ± 0.00033) was observed among the 83 P. knowlesi samples, confirming the extensive genetic polymorphism exhibited among the P. knowlesi population found in Malaysia. A total of 18 distinct haplotypes with 17 amino acid changes were identified, whereby 15 were new haplotypes. High population differentiation values were observed within samples from Peninsular Malaysia and Malaysian Borneo. The 42 kDa fragments of P. knowlesi from Malaysian Borneo were found to be acting on balancing selection whilst purifying selection was suggested to act on isolates from Peninsular Malaysia. The separation of PkMSP-1

conclusionsA high level of genetic diversity was observed among PkMSP-1

Indexed as

PhylogenyAmino Acid SequenceBase SequenceDNA, ProtozoanGenetics, PopulationGeographyHaplotypesMalariaMalaysiaMerozoite Surface Protein 1Plasmodium knowlesiPolymorphism, GeneticProtozoan ProteinsSelection, GeneticSequence Analysis, DNADNA, ProtozoanMerozoite Surface Protein 1Protozoan ProteinsGenetic polymorphismMalaysiaMerozoite surface proteinNatural selectionPlasmodium knowlesi

Identifiers

PMID30518419
PMCPMC6282282
OpenAlexW2902590445

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

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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.