Sornchai Looareesuwan

Differences in genetic population structures of Plasmodium falciparumisolates from patients along Thai-Myanmar border with severe or uncomplicated malaria (2008)

Susomboon, Pannapa, Iwagami, Moritoshi, Tangpukdee, Noppadon, Krusood, Srivicha, Looareesuwan, Sornchai, Kano, Shigeyuki

Abstract Background There have been many reports on the population genetic structures of Plasmodium falciparum from different endemic regions, but few studies have examined the characteristics of...

Suppression of Plasmodium falciparumby serum collected from a case of Plasmodium vivaxinfection (2008)

Nagao, Yoshiro, Kimura-Sato, Masako, Chavalitshewinkoon-Petmitr, Porntip, Thongrungkiat, Supatra, Wilairatana, Polrat, Ishida, Takafumi, ...

Abstract Background It has frequently been reported that Plasmodium vivax suppressed Plasmodium falciparum and ameliorated disease severity in patients infected with these two species simultaneously....

Longitudinal study of Plasmodium falciparumand Plasmodium vivaxin a Karen population in Thailand (2008)

Phimpraphi, Waraphon, Paul, Richard E, Yimsamran, Surapon, Puangsa-art, Supalarp, Thanyavanich, Nipon, Maneeboonyang, Wanchai, ...

Abstract Background Clinical case treatment of malaria infections where Plasmodium falciparum and Plasmodium vivax are sympatric has achieved effective reductions in P. falciparum prevalence and...

Population Pharmacokinetics of Artesunate and Dihydroartemisinin following Intra-Rectal Dosing of Artesunate in Malaria Patients (2006)

Julie A. Simpson, Tsiri Agbenyega, Karen I. Barnes, Gianni Di Perri, Peter Folb, Melba Gomes, ...

BackgroundIntra-rectal artesunate has been developed as a potentially life-saving treatment of severe malaria in rural village settings where administration of parenteral antimalarial drugs is not...

Practical PCR genotyping protocols for Plasmodium vivax using Pvcs and Pvmsp1. (2006)

Imwong, Mallika, Pukrittayakamee, Sasithon, Grüner, Anne Charlotte, Rénia, Laurent, Letourneur, Frank, Looareesuwan, Sornchai, ...

BACKGROUND: Plasmodium vivax is the second most prevalent malaria parasite affecting more than 75 million people each year, mostly in South America and Asia. In addition to major morbidity this...

Practical PCR genotyping protocols for Plasmodium vivax using Pvcs and Pvmsp1. (2006)

Imwong, Mallika, Pukrittayakamee, Sasithon, Grüner, Anne Charlotte, Rénia, Laurent, Letourneur, Frank, Looareesuwan, Sornchai, ...

BACKGROUND: Plasmodium vivax is the second most prevalent malaria parasite affecting more than 75 million people each year, mostly in South America and Asia. In addition to major morbidity this...

Deployment of Early Diagnosis and Mefloquine- Artesunate Treatment of Falciparum Malaria in Thailand: The Tak Malaria Initiative (2006)

Verena Ilona Carrara, Supakit Sirilak, Janjira Thonglairuam, Chaiporn Rojanawatsirivet, Stephane Proux, Valery Gilbos, ...

Artesunate-mefloquine therapy and rapid diagnosis were introduced in five border districts in northwestern Thailand. Cases, hospitalizations, and malaria-related deaths were recorded before, during,...

Deployment of Early Diagnosis and Mefloquine- Artesunate Treatment of Falciparum Malaria in Thailand: The Tak Malaria Initiative (2006)

Verena Ilona Carrara, Supakit Sirilak, Janjira Thonglairuam, Chaiporn Rojanawatsirivet, Stephane Proux, Valery Gilbos, ...

Background Early diagnosis and treatment with artesunate-mefloquine combination therapy (MAS) have reduced the transmission of falciparum malaria dramatically and halted the progression of mefloquine...

A functional polymorphism in the IL1Bgene promoter, IL1B-31C>T, is not associated with cerebral malaria in Thailand (2005)

Ohashi, Jun, Naka, Izumi, Doi, Akihiro, Patarapotikul, Jintana, Hananantachai, Hathairad, Tangpukdee, Noppadon, ...

Abstract Background IL-1β and IL-1RA levels are higher in the serum of cerebral malaria patients than in patients with mild malaria. Recently, the level of IL1B expression was reported to be...

Practical PCR genotyping protocols for Plasmodium vivaxusing Pvcsand Pvmsp1 (2005)

Imwong, Mallika, Pukrittayakamee, Sasithon, Grüner, Anne, Rénia, Laurent, Letourneur, Frank, Looareesuwan, Sornchai, ...

Abstract Background Plasmodium vivax is the second most prevalent malaria parasite affecting more than 75 million people each year, mostly in South America and Asia. In addition to major morbidity...

Practical PCR genotyping protocols for Plasmodium vivax using Pvcs and Pvmsp1. (2005)

Imwong, Mallika, Pukrittayakamee, Sasithon, Grüner, Anne Charlotte, Rénia, Laurent, Letourneur, Frank, Looareesuwan, Sornchai, ...

BACKGROUND: Plasmodium vivax is the second most prevalent malaria parasite affecting more than 75 million people each year, mostly in South America and Asia. In addition to major morbidity this...

Increased fluidity and oxidation of malarial lipoproteins: relation with severity and induction of endothelial expression of adhesion molecules (2004)

Sibmooh, Nathawut, Yamanont, Paveena, Krudsood, Srivicha, Leowattana, Wattana, Brittenham, Gary, Looareesuwan, Sornchai, ...

Abstract Introduction Oxidative stress has been demonstrated in malaria. The potential oxidative modification of lipoproteins derived from malaria patients was studied. These oxidized lipids may have...

DECREASED HEMOGLOBIN CONCENTRATIONS, HYPERPARASITEMIA, AND SEVERE MALARIA ARE ASSOCIATED WITH INCREASED PLASMODIUM FALCIPARUM GAMETOCYTE CARRIAGE (2002)

Mathieu Nacher, Pratap Singhasivanon, Udomsak Silachamroon, Sombat Treeprasertsuk, Thanawat Tosukhowong, Suparp Vannaphan, ...

To determine factors influencing gametocyte carriage, a cross-sectional study was conducted among 512 patients admitted for Plasmodium falciparum malaria. After adjustments for potential confounders,...

Therapeutic Responses to Different Antimalarial Drugs in Vivax Malaria

Pukrittayakamee, Sasithon, Chantra, Arun, Simpson, Julie A., Vanijanonta, Sirivan, Clemens, Ralf, Looareesuwan, Sornchai, ...

The therapeutic responses to the eight most widely used antimalarial drugs were assessed in 207 adult patients with Plasmodium vivax malaria. This parasite does not cause marked sequestration, so...

Therapeutic Responses to Quinine and Clindamycin in Multidrug-Resistant Falciparum Malaria

Pukrittayakamee, Sasithon, Chantra, Arun, Vanijanonta, Sirivan, Clemens, Ralf, Looareesuwan, Sornchai, White, Nicholas J.

Therapeutic responses to clindamycin in combination with quinine were assessed in adult Thai patients with uncomplicated multidrug-resistant Plasmodium falciparum malaria. In total 204 patients were...

Association of Genetic Mutations in Plasmodium vivax dhfr with Resistance to Sulfadoxine-Pyrimethamine: Geographical and Clinical Correlates

Imwong, Mallika, Pukrittakayamee, Sasithon, Looareesuwan, Sornchai, Pasvol, Geoffrey, Poirreiz, Jean, White, Nicholas J., ...

Mutations in the Plasmodium falciparum gene (dhfr) encoding dihydrofolate reductase are associated with resistance to antifols. Plasmodium vivax, the more prevalent malaria parasite in Asia and the...

Effects of α-Thalassemia on Pharmacokinetics of the Antimalarial Agent Artesunate

Ittarat, Wanida, Looareesuwan, Sornchai, Pootrakul, Pensri, Sumpunsirikul, Petchmanee, Vattanavibool, Phantip, Meshnick, Steven R.

Thalassemia is common in Southeast Asia, where artemisinin derivatives are frequently used in the treatment of malaria. It has been previously reported that artemisinin derivatives can be...

Comparison of Oral Artesunate and Dihydroartemisinin Antimalarial Bioavailabilities in Acute Falciparum Malaria

Newton, Paul N., Van Vugt, Michele, Teja-Isavadharm, Paktiya, Siriyanonda, Duangsuda, Rasameesoroj, Maneerat, Teerapong, Pramote, ...

Plasma antimalarial activity following oral artesunate or dihydroartemisinin (DHA) treatment was measured by a bioassay in 18 patients with uncomplicated falciparum malaria. The mean antimalarial...

Febrile temperatures induce cytoadherence of ring-stage Plasmodium falciparum-infected erythrocytes

Udomsangpetch, Rachanee, Pipitaporn, Busaba, Silamut, Kamolrat, Pinches, Robert, Kyes, Sue, Looareesuwan, Sornchai, ...

In falciparum malaria, the malaria parasite induces changes at the infected red blood cell surface that lead to adherence to vascular endothelium and other red blood cells. As a result, the more...

Novel Point Mutations in the Dihydrofolate Reductase Gene of Plasmodium vivax: Evidence for Sequential Selection by Drug Pressure

Imwong, Mallika, Pukrittayakamee, Sasithon, Rénia, Laurent, Letourneur, Franck, Charlieu, Jean-Paul, Leartsakulpanich, Ubolsree, ...

Mutations in the dihydrofolate reductase (dhfr) genes of Plasmodium falciparum and P. vivax are associated with resistance to the antifolate antimalarial drugs. P. vivax dhfr sequences were obtained...

Activities of Artesunate and Primaquine against Asexual- and Sexual-Stage Parasites in Falciparum Malaria

Pukrittayakamee, Sasithon, Chotivanich, Kesinee, Chantra, Arun, Clemens, Ralf, Looareesuwan, Sornchai, White, Nicholas J.

The activities of primaquine in combination with quinine or artesunate against asexual- and sexual-stage parasites were assessed in 176 adult Thai patients with uncomplicated Plasmodium falciparum...

Comparison of Artesunate and Chloroquine Activities against Plasmodium vivax Gametocytes

Nacher, Mathieu, Silachamroon, Udomsak, Singhasivanon, Pratap, Wilairatana, Polrat, Phumratanaprapin, Weerapong, Fontanet, Arnaud, ...

The gametocidal activities of chloroquine and artesunate were compared. The relative risk (RR) of having detectable gametocytes appear after treatment initiation was lower in artesunate-treated...

In Vivo Assessment of Drug Efficacy against Plasmodium falciparum Malaria: Duration of Follow-Up

Stepniewska, Kasia, Taylor, Walter R.J., Mayxay, Mayfong, Price, Ric, Smithuis, Frank, Guthmann, Jean-Paul, ...

To determine the optimum duration of follow-up for the assessment of drug efficacy against Plasmodium falciparum malaria, 96 trial arms from randomized controlled trials (RCTs) with follow-up of 28...

Pharmacokinetics of Oral Doxycycline during Combination Treatment of Severe Falciparum Malaria

Newton, Paul N., Chaulet, Jean-François, Brockman, Alan, Chierakul, Wirongrong, Dondorp, Arjen, Ruangveerayuth, Ronatrai, ...

The pharmacokinetics of oral doxycycline administered at 200 mg every 24 h were investigated in 17 patients recovering from severe Plasmodium falciparum malaria. The data suggest that the doses of...

Limited Polymorphism in the Dihydropteroate Synthetase Gene (dhps) of Plasmodium vivax Isolates from Thailand

Imwong, Mallika, Pukrittayakamee, Sasithon, Cheng, Qin, Moore, Catrin, Looareesuwan, Sornchai, Snounou, Georges, ...

The dhps sequences of 55 Plasmodium vivax isolates (39 from Thailand and 16 from elsewhere) revealed mutant Pvdhps at codons 383 and/or 553 (A → G) in 33 isolates, all from Thailand. Mutations of...

Deployment of Early Diagnosis and Mefloquine- Artesunate Treatment of Falciparum Malaria in Thailand: The Tak Malaria Initiative

Carrara, Verena Ilona, Sirilak, Supakit, Thonglairuam, Janjira, Rojanawatsirivet, Chaiporn, Proux, Stephane, Gilbos, Valery, ...

Artesunate-mefloquine therapy and rapid diagnosis were introduced in five border districts in northwestern Thailand. Cases, hospitalizations, and malaria-related deaths were recorded before, during,...

Transmission-Blocking Activities of Quinine, Primaquine, and Artesunate

Chotivanich, Kesinee, Sattabongkot, Jetsumon, Udomsangpetch, Rachanee, Looareesuwan, Sornchai, Day, Nicholas P. J., Coleman, Russell E., ...

The infectivity of Plasmodium falciparum gametocytes after exposure in vitro to quinine, artesunate, and primaquine was assessed in Anopheles dirus, a major vector of malaria in Southeast Asia....

Population Pharmacokinetics of Artesunate and Dihydroartemisinin following Intra-Rectal Dosing of Artesunate in Malaria Patients

Simpson, Julie A, Agbenyega, Tsiri, Barnes, Karen I, Perri, Gianni Di, Folb, Peter, Gomes, Melba, ...

A study of the population pharmacokinetics of intra-rectal artesunate in patients with moderately severe falciparum malaria found the pharmacokinetic properties of dihydroartemisinin were affected...

Therapeutic Responses to Different Antimalarial Drugs in Vivax Malaria

Pukrittayakamee, Sasithon, Chantra, Arun, Simpson, Julie A., Vanijanonta, Sirivan, Clemens, Ralf, Looareesuwan, Sornchai, ...

The therapeutic responses to the eight most widely used antimalarial drugs were assessed in 207 adult patients with Plasmodium vivax malaria. This parasite does not cause marked sequestration, so...

Therapeutic Responses to Quinine and Clindamycin in Multidrug-Resistant Falciparum Malaria

Pukrittayakamee, Sasithon, Chantra, Arun, Vanijanonta, Sirivan, Clemens, Ralf, Looareesuwan, Sornchai, White, Nicholas J.

Therapeutic responses to clindamycin in combination with quinine were assessed in adult Thai patients with uncomplicated multidrug-resistant Plasmodium falciparum malaria. In total 204 patients were...

Association of Genetic Mutations in Plasmodium vivax dhfr with Resistance to Sulfadoxine-Pyrimethamine: Geographical and Clinical Correlates

Imwong, Mallika, Pukrittakayamee, Sasithon, Looareesuwan, Sornchai, Pasvol, Geoffrey, Poirreiz, Jean, White, Nicholas J., ...

Mutations in the Plasmodium falciparum gene (dhfr) encoding dihydrofolate reductase are associated with resistance to antifols. Plasmodium vivax, the more prevalent malaria parasite in Asia and the...

Effects of α-Thalassemia on Pharmacokinetics of the Antimalarial Agent Artesunate

Ittarat, Wanida, Looareesuwan, Sornchai, Pootrakul, Pensri, Sumpunsirikul, Petchmanee, Vattanavibool, Phantip, Meshnick, Steven R.

Thalassemia is common in Southeast Asia, where artemisinin derivatives are frequently used in the treatment of malaria. It has been previously reported that artemisinin derivatives can be...

Comparison of Oral Artesunate and Dihydroartemisinin Antimalarial Bioavailabilities in Acute Falciparum Malaria

Newton, Paul N., Van Vugt, Michele, Teja-Isavadharm, Paktiya, Siriyanonda, Duangsuda, Rasameesoroj, Maneerat, Teerapong, Pramote, ...

Plasma antimalarial activity following oral artesunate or dihydroartemisinin (DHA) treatment was measured by a bioassay in 18 patients with uncomplicated falciparum malaria. The mean antimalarial...

Febrile temperatures induce cytoadherence of ring-stage Plasmodium falciparum-infected erythrocytes

Udomsangpetch, Rachanee, Pipitaporn, Busaba, Silamut, Kamolrat, Pinches, Robert, Kyes, Sue, Looareesuwan, Sornchai, ...

In falciparum malaria, the malaria parasite induces changes at the infected red blood cell surface that lead to adherence to vascular endothelium and other red blood cells. As a result, the more...

Novel Point Mutations in the Dihydrofolate Reductase Gene of Plasmodium vivax: Evidence for Sequential Selection by Drug Pressure

Imwong, Mallika, Pukrittayakamee, Sasithon, Rénia, Laurent, Letourneur, Franck, Charlieu, Jean-Paul, Leartsakulpanich, Ubolsree, ...

Mutations in the dihydrofolate reductase (dhfr) genes of Plasmodium falciparum and P. vivax are associated with resistance to the antifolate antimalarial drugs. P. vivax dhfr sequences were obtained...

Activities of Artesunate and Primaquine against Asexual- and Sexual-Stage Parasites in Falciparum Malaria

Pukrittayakamee, Sasithon, Chotivanich, Kesinee, Chantra, Arun, Clemens, Ralf, Looareesuwan, Sornchai, White, Nicholas J.

The activities of primaquine in combination with quinine or artesunate against asexual- and sexual-stage parasites were assessed in 176 adult Thai patients with uncomplicated Plasmodium falciparum...

CD36 Polymorphism Is Associated with Protection from Cerebral Malaria

Omi, Kazuya, Ohashi, Jun, Patarapotikul, Jintana, Hananantachai, Hathairad, Naka, Izumi, Looareesuwan, Sornchai, ...

The human protein CD36 is a major receptor for Plasmodium falciparum–infected erythrocytes and contributes to the pathology of P. falciparum malaria. We performed variation screening of the CD36...

Comparison of Artesunate and Chloroquine Activities against Plasmodium vivax Gametocytes

Nacher, Mathieu, Silachamroon, Udomsak, Singhasivanon, Pratap, Wilairatana, Polrat, Phumratanaprapin, Weerapong, Fontanet, Arnaud, ...

The gametocidal activities of chloroquine and artesunate were compared. The relative risk (RR) of having detectable gametocytes appear after treatment initiation was lower in artesunate-treated...

In Vivo Assessment of Drug Efficacy against Plasmodium falciparum Malaria: Duration of Follow-Up

Stepniewska, Kasia, Taylor, Walter R.J., Mayxay, Mayfong, Price, Ric, Smithuis, Frank, Guthmann, Jean-Paul, ...

To determine the optimum duration of follow-up for the assessment of drug efficacy against Plasmodium falciparum malaria, 96 trial arms from randomized controlled trials (RCTs) with follow-up of 28...

Pharmacokinetics of Oral Doxycycline during Combination Treatment of Severe Falciparum Malaria

Newton, Paul N., Chaulet, Jean-François, Brockman, Alan, Chierakul, Wirongrong, Dondorp, Arjen, Ruangveerayuth, Ronatrai, ...

The pharmacokinetics of oral doxycycline administered at 200 mg every 24 h were investigated in 17 patients recovering from severe Plasmodium falciparum malaria. The data suggest that the doses of...

Extended Linkage Disequilibrium Surrounding the Hemoglobin E Variant Due to Malarial Selection

Ohashi, Jun, Naka, Izumi, Patarapotikul, Jintana, Hananantachai, Hathairad, Brittenham, Gary, Looareesuwan, Sornchai, ...

The hemoglobin E variant (HbE; β26Glu→Lys) is concentrated in parts of Southeast Asia where malaria is endemic, and HbE carrier status has been shown to confer some protection against Plasmodium...