2023
Identification of an in vitro artemisinin-resistant Plasmodium falciparum kelch13 R515K mutant parasite in Senegal
Sene S, Pouye M, Martins R, Diallo F, Mangou K, Bei A, Barry A, Faye O, Ndiaye O, Faye O, Sall A, Lopez-Rubio J, Mbengue A. Identification of an in vitro artemisinin-resistant Plasmodium falciparum kelch13 R515K mutant parasite in Senegal. Frontiers In Parasitology 2023, 2: 1076759. DOI: 10.3389/fpara.2023.1076759.Peer-Reviewed Original ResearchPlasmodium falciparum clinical isolatesRing-stage survival assayArtesunate-amodiaquine treatmentPlasmodium falciparum malaria parasitesSentinel surveillance systemFalciparum malaria parasitesK mutationDifferent healthcare centersWorldwide malaria burdenPersistent feverAntimalarial treatmentMalaria-infected blood samplesMalaria casesMalaria burdenIndex caseBlood samplesHealthcare centersClinical isolatesMalaria parasitesSurvival assaysMutant parasitesSurveillance systemFunctional significanceTreatmentParasites
2017
Genetic relatedness analysis reveals the cotransmission of genetically related Plasmodium falciparum parasites in Thiès, Senegal
Wong W, Griggs AD, Daniels RF, Schaffner SF, Ndiaye D, Bei AK, Deme AB, MacInnis B, Volkman SK, Hartl DL, Neafsey DE, Wirth DF. Genetic relatedness analysis reveals the cotransmission of genetically related Plasmodium falciparum parasites in Thiès, Senegal. Genome Medicine 2017, 9: 5. PMID: 28118860, PMCID: PMC5260019, DOI: 10.1186/s13073-017-0398-0.Peer-Reviewed Original ResearchConceptsPolygenomic infectionsRelatedness of strainsMalaria elimination activitiesPlasmodium falciparum parasitesPublic health interventionsEpidemiology modelFalciparum parasitesHealth interventionsDrug resistanceInfectionParasite populationsConclusionsOur findingsCotransmissionSuperinfection modelElimination activitiesTransmission intensityGenetic relatedness analysisGenetic profileInterventionParasitesMajor contributorPatientsPopulationSuperinfectionThiès
2016
Ancient human sialic acid variant restricts an emerging zoonotic malaria parasite
Dankwa S, Lim C, Bei AK, Jiang RH, Abshire JR, Patel SD, Goldberg JM, Moreno Y, Kono M, Niles JC, Duraisingh MT. Ancient human sialic acid variant restricts an emerging zoonotic malaria parasite. Nature Communications 2016, 7: 11187. PMID: 27041489, PMCID: PMC4822025, DOI: 10.1038/ncomms11187.Peer-Reviewed Original ResearchConceptsInvasion ligandsSialic acid-independent pathwaysHuman RBCsZoonotic malaria parasiteAbsence of Neu5GcPlasmodium knowlesiMalaria parasitesCell surface receptorsN-glycolylneuraminic acidZoonotic parasitesSialic acid variantsSurface receptorsRBCsReceptorsNeu5GcMacaquesInvasionParasitesCMAHAcetylneuraminic acidAcid variantsHumansMalariaKnowlesi
2015
Measuring Plasmodium falciparum Erythrocyte Invasion Phenotypes Using Flow Cytometry
Bei AK, Duraisingh MT. Measuring Plasmodium falciparum Erythrocyte Invasion Phenotypes Using Flow Cytometry. Methods In Molecular Biology 2015, 1325: 167-186. PMID: 26450388, DOI: 10.1007/978-1-4939-2815-6_14.Peer-Reviewed Original ResearchConceptsPlasmodium falciparum merozoite invasionParasite multiplication rateErythrocyte invasion phenotypesInvasion of erythrocytesFlow cytometry methodVaccine mechanismDisease severityInvasion inhibitionEx vivoFlow cytometryMerozoite invasionCytometry methodRing stageInvasion phenotypeInvasionResearch settingsVivoImportant determinantLow levelsAlternative pathwayParasitesParasitemia
2014
An Adjustable Gas-Mixing Device to Increase Feasibility of In Vitro Culture of Plasmodium falciparum Parasites in the Field
Bei AK, Patel SD, Volkman SK, Ahouidi AD, Ndiaye D, Mboup S, Wirth DF. An Adjustable Gas-Mixing Device to Increase Feasibility of In Vitro Culture of Plasmodium falciparum Parasites in the Field. PLOS ONE 2014, 9: e90928. PMID: 24603696, PMCID: PMC3946284, DOI: 10.1371/journal.pone.0090928.Peer-Reviewed Original Research
2012
SNP Genotyping Identifies New Signatures of Selection in a Deep Sample of West African Plasmodium falciparum Malaria Parasites
Amambua-Ngwa A, Park DJ, Volkman SK, Barnes KG, Bei AK, Lukens AK, Sene P, Van Tyne D, Ndiaye D, Wirth DF, Conway DJ, Neafsey DE, Schaffner SF. SNP Genotyping Identifies New Signatures of Selection in a Deep Sample of West African Plasmodium falciparum Malaria Parasites. Molecular Biology And Evolution 2012, 29: 3249-3253. PMID: 22688945, PMCID: PMC3472499, DOI: 10.1093/molbev/mss151.Peer-Reviewed Original ResearchConceptsHigh-density single nucleotide polymorphism arraysRecent selective sweepLocal selection pressuresSignals of selectionDrug resistance lociSingle nucleotide polymorphism arrayHaplotype-based testsPlasmodium falciparum malaria parasitesSelective sweepsResistance lociGenetic diversityGenomic regionsRecent selectionGenomic analysisSelection signalsPositive selectionSelection pressureFalciparum malaria parasitesPolymorphism arrayAntigenic lociMalaria parasitesMosquito vectorsEndemic populationsLociParasitesFunctional analysis of erythrocyte determinants of Plasmodium infection
Bei AK, Duraisingh MT. Functional analysis of erythrocyte determinants of Plasmodium infection. International Journal For Parasitology 2012, 42: 575-582. PMID: 22726752, PMCID: PMC3383627, DOI: 10.1016/j.ijpara.2012.03.006.Peer-Reviewed Original ResearchConceptsFunctional analysisErythrocyte determinantsObligate intracellular pathogensPlasmodium infectionTransgenic approachesHuman erythrocytes resultsNatural variationErythrocyte invasionIntracellular pathogensPlasmodium falciparum parasitesUnexplored frontierClinical manifestationsMalaria researchErythrocytes resultsFalciparum parasitesInvasionMalarial diseaseChemical biologicalInfectionErythrocytesParasitesPathogensDeterminantsRemodellingDiscovery
2010
In Vitro Genetic Analysis of an Erythrocyte Determinant of Malaria Infection
Bei AK, Brugnara C, Duraisingh MT. In Vitro Genetic Analysis of an Erythrocyte Determinant of Malaria Infection. The Journal Of Infectious Diseases 2010, 202: 1722-1727. PMID: 20958212, PMCID: PMC3107553, DOI: 10.1086/657157.Peer-Reviewed Original ResearchConceptsGenetic analysisErythrocyte determinantsSystematic functional analysisDirect genetic analysisErythrocyte biologyInvasion of erythrocytesIsogenic backgroundP. falciparum invasionGene expressionFunctional analysisParasite invasionObligatory stepLentiviral transductionHost receptorsGlycophorin ALife cyclePlasmodium falciparumCulture systemInvasionMalaria infectionUnambiguous identificationTransductionBiologyParasitesErythrocytes
2009
Erythrocyte invasion profiles are associated with a common invasion ligand polymorphism in Senegalese isolates of Plasmodium falciparum
LANTOS PM, AHOUIDI AD, BEI AK, JENNINGS CV, SARR O, NDIR O, WIRTH DF, MBOUP S, DURAISINGH MT. Erythrocyte invasion profiles are associated with a common invasion ligand polymorphism in Senegalese isolates of Plasmodium falciparum. Parasitology 2009, 136: 1-9. PMID: 19126266, DOI: 10.1017/s0031182008005167.Peer-Reviewed Original ResearchConceptsErythrocyte receptorSialic acid-independent invasionBlood group O patientsDifferent erythrocyte receptorsGroup O patientsSenegalese isolatesParasite multiplication ratePlasmodium falciparum parasitesMultiple ligand-receptor interactionsO patientsFalciparum parasitesLarge sequence deletionsVariant expression levelParasite isolatesPlasmodium falciparumErythrocyte invasionSelectivity indexReceptorsExpression levelsMajor polymorphismsInvasionInvasion pathwaysPossible determinantsParasitesHuman erythrocytes