Journal ArticleDOI
Evidence of Artemisinin-Resistant Malaria in Western Cambodia
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TLDR
Artemisinins are potent and rapidly acting antimalarial drugs, and their widespread use for treating patients with Plasmodium falciparum malaria raises the question of emerging drug resistance.Abstract:
To the Editor: Although artemisinins are potent and rapidly acting antimalarial drugs, their widespread use for treating patients with Plasmodium falciparum malaria raises the question of emerging drug resistance.1,2 Artemisinin monotherapy should not be used in areas where malaria is endemic; it requires an extended administration period and may lead to treatment failure, most frequently because of problems with compliance. Recent reports of high failure rates associated with artemisinin-based combination therapy, as well as in vitro drug-susceptibility data, suggest the possibility of clinical artemisinin resistance along the Thai–Cambodian border.3,4 We studied the potential emergence of artemisinin resistance using . . .read more
Citations
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Journal ArticleDOI
Artemisinin Resistance in Plasmodium falciparum Malaria
Arjen M. Dondorp,François Nosten,Poravuth Yi,Debashish Das,Aung Phae Phyo,Joel Tarning,Khin Maung Lwin,Frédéric Ariey,Warunee Hanpithakpong,Sue J. Lee,Pascal Ringwald,Kamolrat Silamut,Mallika Imwong,Kesinee Chotivanich,Pharath Lim,Trent Herdman,Sen Sam An,Shunmay Yeung,Pratap Singhasivanon,Nicholas P. J. Day,Niklas Lindegardh,Duong Socheat,Nicholas J. White +22 more
TL;DR: The overall median clearance times were 84 hours (interquartile range, 60 to 96) in Pailin and 48 hours in Wang Pha (P<0.001) in each of the two locations as discussed by the authors.
Journal ArticleDOI
Spread of Artemisinin Resistance in Plasmodium falciparum Malaria
Elizabeth A. Ashley,Mehul Dhorda,Rick M. Fairhurst,Chanaki Amaratunga,Pharath Lim,Seila Suon,Sokunthea Sreng,Jennifer M. Anderson,Mao S,Sam B,Chantha Sopha,Char Meng Chuor,Chea Nguon,Siv Sovannaroth,Sasithon Pukrittayakamee,Podjanee Jittamala,Kesinee Chotivanich,K Chutasmit,C Suchatsoonthorn,R Runcharoen,Tran Tinh Hien,Nguyen Thuy-Nhien,Thanh Nv,Nguyen Hoan Phu,Ye Htut,Han Kt,Kyin Hla Aye,Olugbenga A. Mokuolu,Rasaq Olaosebikan,Olaleke Oluwasegun Folaranmi,Mayfong Mayxay,Maniphone Khanthavong,Bouasy Hongvanthong,Paul N. Newton,M A Onyamboko,Caterina I. Fanello,Antoinette Tshefu,Neelima Mishra,Neena Valecha,Aung Pyae Phyo,François Nosten,Yi P,Rupam Tripura,Steffen Borrmann,Mahfudh Bashraheil,Judy Peshu,M A Faiz,Aniruddha Ghose,M A Hossain,Rasheda Samad,M. R. Rahman,Manal Hasan,Ashraful Islam,Olivo Miotto,Roberto Amato,Bronwyn MacInnis,Jim Stalker,Dominic P. Kwiatkowski,Zbynek Bozdech,Atthanee Jeeyapant,Phaik Yeong Cheah,Tharisara Sakulthaew,Jeremy Chalk,Benjamas Intharabut,Kamolrat Silamut,Lee Sj,Benchawan Vihokhern,Chanon Kunasol,Mallika Imwong,Joel Tarning,Taylor Wj,Shunmay Yeung,Charles J. Woodrow,Jennifer A. Flegg,Debashish Das,Jennifer L. Smith,Meera Venkatesan,Christopher V. Plowe,Kasia Stepniewska,Philippe J Guerin,Arjen M. Dondorp,Nicholas P. J. Day,Nicholas J. White +82 more
TL;DR: Prolonged courses of artemisinin-based combination therapies are currently efficacious in areas where standard 3-day treatments are failing, and the incidence of pretreatment and post-treatment gametocytemia was higher among patients with slow parasite clearance, suggesting greater potential for transmission.
Journal ArticleDOI
A molecular marker of artemisinin-resistant Plasmodium falciparum malaria
Frédéric Ariey,Benoit Witkowski,Chanaki Amaratunga,Johann Beghain,Anne-Claire Langlois,Nimol Khim,Saorin Kim,Valentine Duru,Christiane Bouchier,Laurence Ma,Pharath Lim,Rithea Leang,Socheat Duong,Sokunthea Sreng,Seila Suon,Char Meng Chuor,Denis Mey Bout,Sandie Menard,William O. Rogers,Blaise Genton,Thierry Fandeur,Olivo Miotto,Pascal Ringwald,Jacques Le Bras,Antoine Berry,Jean Christophe Barale,Rick M. Fairhurst,Françoise Benoit-Vical,Odile Mercereau-Puijalon,Didier Menard +29 more
TL;DR: Strong correlations between the presence of a mutant allele, in vitro parasite survival rates and in vivo parasite clearance rates indicate that K13-propeller mutations are important determinants of artemisinin resistance.
Journal ArticleDOI
Spiroindolones, a Potent Compound Class for the Treatment of Malaria
Matthias Rottmann,Matthias Rottmann,Case W. McNamara,Bryan K. S. Yeung,Marcus C. S. Lee,Bin Zou,Bruce Russell,Bruce Russell,Patrick Seitz,Patrick Seitz,David Plouffe,Neekesh V. Dharia,Jocelyn Tan,Steven Cohen,Kathryn S. R. Spencer,Gonzalo E. González-Páez,Suresh B. Lakshminarayana,Anne Goh,Rossarin Suwanarusk,Timothy Jegla,Esther K. Schmitt,Hans-Peter Beck,Hans-Peter Beck,Reto Brun,Reto Brun,François Nosten,François Nosten,Laurent Rénia,Véronique Dartois,Thomas H. Keller,David A. Fidock,Elizabeth A. Winzeler,Elizabeth A. Winzeler,Thierry T. Diagana +33 more
TL;DR: The preclinical profile for an optimized spiroindolone drug candidate, NITD609, shows pharmacokinetic properties compatible with once-daily oral dosing and has single-dose efficacy in a rodent malaria model.
Journal ArticleDOI
Emergence of artemisinin-resistant malaria on the western border of Thailand: a longitudinal study
Aung Pyae Phyo,Standwell Nkhoma,Kasia Stepniewska,Kasia Stepniewska,Elizabeth A. Ashley,Elizabeth A. Ashley,Shalini Nair,Rose McGready,Rose McGready,Carit Ler Moo,Salma Al-Saai,Arjen M. Dondorp,Arjen M. Dondorp,Khin Maung Lwin,Pratap Singhasivanon,Nicholas P. J. Day,Nicholas P. J. Day,Nicholas J. White,Nicholas J. White,Tim J. Anderson,François Nosten,François Nosten +21 more
TL;DR: Genetically determined artemisinin resistance in P falciparum emerged along the Thailand–Myanmar border at least 8 years ago and has since increased substantially, with experts predicting resistance will reach rates reported in western Cambodia in 2–6 years.
References
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Journal ArticleDOI
Resistance of Plasmodium falciparum field isolates to in-vitro artemether and point mutations of the SERCA-type PfATPase6
Ronan Jambou,Eric Legrand,Makhtar Niang,Nimol Khim,Pharath Lim,Béatrice Volney,Marie Therese Ekala,Christiane Bouchier,Philippe Esterre,Thierry Fandeur,Odile Mercereau-Puijalon +10 more
TL;DR: A rise in resistance to artemisinin derivatives in field isolates indicates the need for increased vigilance and a coordinated and rapid deployment of drug combinations.
Journal ArticleDOI
Artemisinins: their growing importance in medicine
TL;DR: This safe and cheap drug class that saves lives at risk from malaria can also have important potential in oncology, and recent advances in defining the role of artemisinins are discussed.
Journal ArticleDOI
In vivo sensitivity monitoring of mefloquine monotherapy and artesunate-mefloquine combinations for the treatment of uncomplicated falciparum malaria in Thailand in 2003.
Saowanit Vijaykadga,Chaiporn Rojanawatsirivej,Sawat Cholpol,Duangduen Phoungmanee,Argat Nakavej,Chansuda Wongsrichanalai +5 more
TL;DR: The objective is to monitor the efficacy of anti‐malarial treatments in Thailand and to establish a protocol for evaluating the safety and effectiveness of these treatments against infectious diseases.
Journal ArticleDOI
Are we losing artemisinin combination therapy already
Journal ArticleDOI
Artemisinin resistance: how can we find it?
TL;DR: Since 2001, 40 countries have officially adopted artemisinin-based combination therapy for treating Plasmodium falciparum malaria and 20 have adopted the combination of artemether and lumefantrine as their first- or second-line treatment.
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