Experimental evolution, genetic analysis and genome re-sequencing reveal the mutation conferring artemisinin resistance in an isogenic lineage of malaria parasites
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Type
ArticleAuthors
Hunt, PaulMartinelli, Axel
Modrzynska, Katarzyna
Borges, Sofia
Creasey, Alison
Rodrigues, Louise
Beraldi, Dario
Loewe, Laurence
Fawcett, Richard
Kumar, Sujai
Thomson, Marian
Trivedi, Urmi
Otto, Thomas D
Pain, Arnab

Blaxter, Mark
Cravo, Pedro
KAUST Department
Biological and Environmental Sciences and Engineering (BESE) DivisionBioscience Program
Computational Bioscience Research Center (CBRC)
Pathogen Genomics Laboratory
Date
2010-09-16Online Publication Date
2010-09-16Print Publication Date
2010Permanent link to this record
http://hdl.handle.net/10754/325240
Metadata
Show full item recordAbstract
Background: Classical and quantitative linkage analyses of genetic crosses have traditionally been used to map genes of interest, such as those conferring chloroquine or quinine resistance in malaria parasites. Next-generation sequencing technologies now present the possibility of determining genome-wide genetic variation at single base-pair resolution. Here, we combine in vivo experimental evolution, a rapid genetic strategy and whole genome re-sequencing to identify the precise genetic basis of artemisinin resistance in a lineage of the rodent malaria parasite, Plasmodium chabaudi. Such genetic markers will further the investigation of resistance and its control in natural infections of the human malaria, P. falciparum.Results: A lineage of isogenic in vivo drug-selected mutant P. chabaudi parasites was investigated. By measuring the artemisinin responses of these clones, the appearance of an in vivo artemisinin resistance phenotype within the lineage was defined. The underlying genetic locus was mapped to a region of chromosome 2 by Linkage Group Selection in two different genetic crosses. Whole-genome deep coverage short-read re-sequencing (IlluminaSolexa) defined the point mutations, insertions, deletions and copy-number variations arising in the lineage. Eight point mutations arise within the mutant lineage, only one of which appears on chromosome 2. This missense mutation arises contemporaneously with artemisinin resistance and maps to a gene encoding a de-ubiquitinating enzyme.Conclusions: This integrated approach facilitates the rapid identification of mutations conferring selectable phenotypes, without prior knowledge of biological and molecular mechanisms. For malaria, this model can identify candidate genes before resistant parasites are commonly observed in natural human malaria populations. 2010 Hunt et al; licensee BioMed Central Ltd.Citation
Hunt P, Martinelli A, Modrzynska K, Borges S, Creasey A, et al. (2010) Experimental evolution, genetic analysis and genome re-sequencing reveal the mutation conferring artemisinin resistance in an isogenic lineage of malaria parasites. BMC Genomics 11: 499. doi:10.1186/1471-2164-11-499.Publisher
Springer NatureJournal
BMC GenomicsPubMed ID
20846421PubMed Central ID
PMC2996995ae974a485f413a2113503eed53cd6c53
10.1186/1471-2164-11-499
Scopus Count
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Except where otherwise noted, this item's license is described as This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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- Issue date: 2012 Mar 21
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