A molecular mechanism of artemisinin resistance in Plasmodium falciparum malaria

Alassane Mbengue, Souvik Bhattacharjee, Trupti Pandharkar, Haining Liu, Guillermina Estiu, Robert V. Stahelin, Shahir S. Rizk, Dieudonne L. Njimoh, Yana Ryan, Kesinee Chotivanich, Chea Nguon, Mehdi Ghorbal, Jose Juan Lopez-Rubio, Michael Pfrender, Scott Emrich, Narla Mohandas, Arjen M. Dondorp, Olaf Wiest, Kasturi Haldar

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Abstract

Artemisinins are the cornerstone of anti-malarial drugs. Emergence and spread of resistance to them raises risk of wiping out recent gains achieved in reducing worldwide malaria burden and threatens future malaria control and elimination on a global level. Genome-wide association studies (GWAS) have revealed parasite genetic loci associated with artemisinin resistance. However, there is no consensus on biochemical targets of artemisinin. Whether and how these targets interact with genes identified by GWAS, remains unknown. Here we provide biochemical and cellular evidence that artemisinins are potent inhibitors of Plasmodium falciparum phosphatidylinositol-3-kinase (PfPI3K), revealing an unexpected mechanism of action. In resistant clinical strains, increased PfPI3K was associated with the C580Y mutation in P. falciparum Kelch13 (PfKelch13), a primary marker of artemisinin resistance. Polyubiquitination of PfPI3K and its binding to PfKelch13 were reduced by the PfKelch13 mutation, which limited proteolysis of PfPI3K and thus increased levels of the kinase, as well as its lipid product phosphatidylinositol-3-phosphate (PI3P). We find PI3P levels to be predictive of artemisinin resistance in both clinical and engineered laboratory parasites as well as across non-isogenic strains. Elevated PI3P induced artemisinin resistance in absence of PfKelch13 mutations, but remained responsive to regulation by PfKelch13. Evidence is presented for PI3P-dependent signalling in which transgenic expression of an additional kinase confers resistance. Together these data present PI3P as the key mediator of artemisinin resistance and the sole PfPI3K as an important target for malaria elimination.

Original languageEnglish (US)
Pages (from-to)683-687
Number of pages5
JournalNature
Volume520
Issue number7549
DOIs
StatePublished - Apr 30 2015

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Falciparum Malaria
Plasmodium falciparum
Phosphatidylinositol 3-Kinase
Artemisinins
Malaria
Genome-Wide Association Study
Mutation
Parasites
Phosphotransferases
artemisinine
Genetic Loci
Antimalarials
Proteolysis
phosphatidylinositol 3-phosphate
Lipids

ASJC Scopus subject areas

  • General

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Mbengue, A., Bhattacharjee, S., Pandharkar, T., Liu, H., Estiu, G., Stahelin, R. V., ... Haldar, K. (2015). A molecular mechanism of artemisinin resistance in Plasmodium falciparum malaria. Nature, 520(7549), 683-687. https://doi.org/10.1038/nature14412

A molecular mechanism of artemisinin resistance in Plasmodium falciparum malaria. / Mbengue, Alassane; Bhattacharjee, Souvik; Pandharkar, Trupti; Liu, Haining; Estiu, Guillermina; Stahelin, Robert V.; Rizk, Shahir S.; Njimoh, Dieudonne L.; Ryan, Yana; Chotivanich, Kesinee; Nguon, Chea; Ghorbal, Mehdi; Lopez-Rubio, Jose Juan; Pfrender, Michael; Emrich, Scott; Mohandas, Narla; Dondorp, Arjen M.; Wiest, Olaf; Haldar, Kasturi.

In: Nature, Vol. 520, No. 7549, 30.04.2015, p. 683-687.

Research output: Contribution to journalArticle

Mbengue, A, Bhattacharjee, S, Pandharkar, T, Liu, H, Estiu, G, Stahelin, RV, Rizk, SS, Njimoh, DL, Ryan, Y, Chotivanich, K, Nguon, C, Ghorbal, M, Lopez-Rubio, JJ, Pfrender, M, Emrich, S, Mohandas, N, Dondorp, AM, Wiest, O & Haldar, K 2015, 'A molecular mechanism of artemisinin resistance in Plasmodium falciparum malaria', Nature, vol. 520, no. 7549, pp. 683-687. https://doi.org/10.1038/nature14412
Mbengue A, Bhattacharjee S, Pandharkar T, Liu H, Estiu G, Stahelin RV et al. A molecular mechanism of artemisinin resistance in Plasmodium falciparum malaria. Nature. 2015 Apr 30;520(7549):683-687. https://doi.org/10.1038/nature14412
Mbengue, Alassane ; Bhattacharjee, Souvik ; Pandharkar, Trupti ; Liu, Haining ; Estiu, Guillermina ; Stahelin, Robert V. ; Rizk, Shahir S. ; Njimoh, Dieudonne L. ; Ryan, Yana ; Chotivanich, Kesinee ; Nguon, Chea ; Ghorbal, Mehdi ; Lopez-Rubio, Jose Juan ; Pfrender, Michael ; Emrich, Scott ; Mohandas, Narla ; Dondorp, Arjen M. ; Wiest, Olaf ; Haldar, Kasturi. / A molecular mechanism of artemisinin resistance in Plasmodium falciparum malaria. In: Nature. 2015 ; Vol. 520, No. 7549. pp. 683-687.
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