2024
Vaccine-induced human monoclonal antibodies to PfRH5 show broadly neutralizing activity against P. falciparum clinical isolates
Thiam L, McHugh K, Ba A, Li R, Guo Y, Pouye M, Cisse A, Pipini D, Diallo F, Sene S, Patel S, Thiam A, Sadio B, Mbengue A, Vigan-Womas I, Sheng Z, Shapiro L, Draper S, Bei A. Vaccine-induced human monoclonal antibodies to PfRH5 show broadly neutralizing activity against P. falciparum clinical isolates. Npj Vaccines 2024, 9: 198. PMID: 39448626, PMCID: PMC11502735, DOI: 10.1038/s41541-024-00986-x.Peer-Reviewed Original ResearchP. falciparum clinical isolatesClinical isolatesNext-generation sequencingEarly clinical studiesDose-dependent inhibitionGrowth inhibition activitySingle B cellsOccurrence of novel mutationsNext-generation sequencing analysisBlood-stageNo significant differencePfRH5MAb combinationsNovel mutationsClinical studiesNeutralizing activityAntibody susceptibilityIgG responsesPre-clinicalGenotype/phenotype relationshipsMonoclonal antibodiesVaccine alleleGenetic diversitySignificant differenceMAb
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
2014
Immune Characterization of Plasmodium falciparum Parasites with a Shared Genetic Signature in a Region of Decreasing Transmission
Bei AK, Diouf A, Miura K, Larremore DB, Ribacke U, Tullo G, Moss EL, Neafsey DE, Daniels RF, Zeituni AE, Nosamiefan I, Volkman SK, Ahouidi AD, Ndiaye D, Dieye T, Mboup S, Buckee CO, Long CA, Wirth DF. Immune Characterization of Plasmodium falciparum Parasites with a Shared Genetic Signature in a Region of Decreasing Transmission. Infection And Immunity 2014, 83: 276-285. PMID: 25368109, PMCID: PMC4288878, DOI: 10.1128/iai.01979-14.Peer-Reviewed Original ResearchConceptsQuantitative reverse transcription PCRCommon genetic signatureSurface antigenClinical isolatesVar genesPlasmodium falciparum parasite populationsVariant surface antigensPlasmodium falciparum parasitesParasite-infected erythrocytesImmune characterizationMajor variant surface antigenSpecific parasite genotypesReverse transcription-PCRImmune responseFalciparum parasitesImmune recognitionMalaria transmissionVar transcriptsInfected erythrocytesParasite growthParasite clonesTranscription-PCRAntibodiesParasite correlatesParasite genotypes
2013
Plasmodium falciparum Merozoite Surface Antigen, PfRH5, Elicits Detectable Levels of Invasion-Inhibiting Antibodies in Humans
Patel SD, Ahouidi AD, Bei AK, Dieye TN, Mboup S, Harrison SC, Duraisingh MT. Plasmodium falciparum Merozoite Surface Antigen, PfRH5, Elicits Detectable Levels of Invasion-Inhibiting Antibodies in Humans. The Journal Of Infectious Diseases 2013, 208: 1679-1687. PMID: 23904294, PMCID: PMC3805239, DOI: 10.1093/infdis/jit385.Peer-Reviewed Original ResearchConceptsMerozoite surface antigenSurface antigenPlasmodium falciparum merozoite surface antigenMulti-subunit vaccineMillions of infectionsIntracellular protozoan parasiteInvasion inhibition assaysSubstantial morbidityClinical isolatesP. falciparumBlood stagesPlasmodium falciparumNatural infectionAntibodiesPfRH5Protozoan parasiteDetectable levelsInhibition assaysInfectionAntigenFalciparumRecombinant formMorbidityLaboratory strainsVaccineInhibitory Humoral Responses to the Plasmodium falciparum Vaccine Candidate EBA-175 Are Independent of the Erythrocyte Invasion Pathway
Badiane AS, Bei AK, Ahouidi AD, Patel SD, Salinas N, Ndiaye D, Sarr O, Ndir O, Tolia NH, Mboup S, Duraisingh MT. Inhibitory Humoral Responses to the Plasmodium falciparum Vaccine Candidate EBA-175 Are Independent of the Erythrocyte Invasion Pathway. MSphere 2013, 20: 1238-1245. PMID: 23761656, PMCID: PMC3754519, DOI: 10.1128/cvi.00135-13.Peer-Reviewed Original ResearchConceptsEnzyme-linked immunosorbent assayEBA-175Human antibodiesAffinity-purified human antibodiesBlood-stage vaccine candidateParasite strainsSialic acid-dependent mannerParasite invasionPresence of antibodiesErythrocyte-binding domainMultiple ligand-receptor interactionsEx vivo assaysPooled patient plasmaSenegalese parasitesAlternative invasion pathwaysHumoral responseVaccine candidatesPatient plasmaSenegalese patientsLigand-receptor interactionsClinical isolatesInvasion inhibitionVaccine designEx vivoFunctional inhibition