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A tetraoxane-based antimalarial drug candidate that overcomes PfK13-C580Y dependent artemisinin resistance.


ABSTRACT: K13 gene mutations are a primary marker of artemisinin resistance in Plasmodium falciparum malaria that threatens the long-term clinical utility of artemisinin-based combination therapies, the cornerstone of modern day malaria treatment. Here we describe a multinational drug discovery programme that has delivered a synthetic tetraoxane-based molecule, E209, which meets key requirements of the Medicines for Malaria Venture drug candidate profiles. E209 has potent nanomolar inhibitory activity against multiple strains of P. falciparum and P. vivax in vitro, is efficacious against P. falciparum in in vivo rodent models, produces parasite reduction ratios equivalent to dihydroartemisinin and has pharmacokinetic and pharmacodynamic characteristics compatible with a single-dose cure. In vitro studies with transgenic parasites expressing variant forms of K13 show no cross-resistance with the C580Y mutation, the primary variant observed in Southeast Asia. E209 is a superior next generation endoperoxide with combined pharmacokinetic and pharmacodynamic features that overcome the liabilities of artemisinin derivatives.

SUBMITTER: O'Neill PM 

PROVIDER: S-EPMC5458052 | biostudies-literature | 2017 May

REPOSITORIES: biostudies-literature

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A tetraoxane-based antimalarial drug candidate that overcomes PfK13-C580Y dependent artemisinin resistance.

O'Neill Paul M PM   Amewu Richard K RK   Charman Susan A SA   Sabbani Sunil S   Gnädig Nina F NF   Straimer Judith J   Fidock David A DA   Shore Emma R ER   Roberts Natalie L NL   Wong Michael H-L MH   Hong W David WD   Pidathala Chandrakala C   Riley Chris C   Murphy Ben B   Aljayyoussi Ghaith G   Gamo Francisco Javier FJ   Sanz Laura L   Rodrigues Janneth J   Cortes Carolina Gonzalez CG   Herreros Esperanza E   Angulo-Barturén Iñigo I   Jiménez-Díaz María Belén MB   Bazaga Santiago Ferrer SF   Martínez-Martínez María Santos MS   Campo Brice B   Sharma Raman R   Ryan Eileen E   Shackleford David M DM   Campbell Simon S   Smith Dennis A DA   Wirjanata Grennady G   Noviyanti Rintis R   Price Ric N RN   Marfurt Jutta J   Palmer Michael J MJ   Copple Ian M IM   Mercer Amy E AE   Ruecker Andrea A   Delves Michael J MJ   Sinden Robert E RE   Siegl Peter P   Davies Jill J   Rochford Rosemary R   Kocken Clemens H M CHM   Zeeman Anne-Marie AM   Nixon Gemma L GL   Biagini Giancarlo A GA   Ward Stephen A SA  

Nature communications 20170524


K13 gene mutations are a primary marker of artemisinin resistance in Plasmodium falciparum malaria that threatens the long-term clinical utility of artemisinin-based combination therapies, the cornerstone of modern day malaria treatment. Here we describe a multinational drug discovery programme that has delivered a synthetic tetraoxane-based molecule, E209, which meets key requirements of the Medicines for Malaria Venture drug candidate profiles. E209 has potent nanomolar inhibitory activity aga  ...[more]

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