A major genome region underlying artemisinin resistance in malaria

Ian H. Cheeseman, Becky A. Miller, Shalini Nair, Standwell Nkhoma, Asako Tan, John C. Tan, Salma Al Saai, Aung Pyae Phyo, Carit Ler Moo, Khin Maung Lwin, Rose McGready, Elizabeth Ashley, Mallika Imwong, Kasia Stepniewska, Poravuth Yi, Arjen M. Dondorp, Mayfong Mayxay, Paul N. Newton, Nicholas J. White, François NostenMichael T. Ferdig, Timothy J.C. Anderson

    Research output: Contribution to journalArticlepeer-review

    283 Scopus citations


    Evolving resistance to artemisinin-based compounds threatens to derail attempts to control malaria. Resistance has been confirmed in western Cambodia and has recently emerged in western Thailand, but is absent from neighboring Laos. Artemisinin resistance results in reduced parasite clearance rates (CRs) after treatment. We used a two-phase strategy to identify genome region(s) underlying this ongoing selective event. Geographical differentiation and haplotype structure at 6969 polymorphic single-nucleotide polymorphisms (SNPs) in 91 parasites from Cambodia, Thailand, and Laos identified 33 genome regions under strong selection. We screened SNPs and microsatellites within these regions in 715 parasites from Thailand, identifying a selective sweep on chromosome 13 that shows strong association (P = 10-6 to 10 -12) with slow CRs, illustrating the efficacy of targeted association for identifying the genetic basis of adaptive traits.

    Original languageEnglish (US)
    Pages (from-to)79-82
    Number of pages4
    Issue number6077
    StatePublished - Apr 6 2012

    ASJC Scopus subject areas

    • General

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