Pallavi Singh
Associate Research ScientistAbout
Research
Overview
Medical Research Interests
Babesiosis; Disease Transmission, Infectious; Host-Parasite Interactions; Malaria; Protozoan Infections; Tick-Borne Diseases; Vector Borne Diseases
Publications
Featured Publications
Babesia duncani multi-omics identifies virulence factors and drug targets
Singh P, Lonardi S, Liang Q, Vydyam P, Khabirova E, Fang T, Gihaz S, Thekkiniath J, Munshi M, Abel S, Ciampossin L, Batugedara G, Gupta M, Lu X, Lenz T, Chakravarty S, Cornillot E, Hu Y, Ma W, Gonzalez L, Sánchez S, Estrada K, Sánchez-Flores A, Montero E, Harb O, Le Roch K, Mamoun C. Babesia duncani multi-omics identifies virulence factors and drug targets. Nature Microbiology 2023, 8: 845-859. PMID: 37055610, PMCID: PMC10159843, DOI: 10.1038/s41564-023-01360-8.Peer-Reviewed Original ResearchConceptsDrug targetsVirulence factorsCandidate virulence factorsRNA-seq dataIntraerythrocytic life cycleAttractive drug targetB. duncaniNuclear genomeGenome annotationApicomplexan parasitesApicomplexan pathogensEpigenetic profilesEpigenetic analysisParasite metabolismMalaria-like diseaseHuman erythrocytesLife cycle stagesBabesia speciesGenomeMetabolic requirementsCycle stagesLife cycleBiologySmall moleculesPotent inhibitorRole of a patatin-like phospholipase in Plasmodium falciparum gametogenesis and malaria transmission
Singh P, Alaganan A, More K, Lorthiois A, Thiberge S, Gorgette O, Guillotte Blisnick M, Guglielmini J, Aguilera S, Touqui L, Singh S, Chitnis C. Role of a patatin-like phospholipase in Plasmodium falciparum gametogenesis and malaria transmission. Proceedings Of The National Academy Of Sciences Of The United States Of America 2019, 116: 17498-17508. PMID: 31413195, PMCID: PMC6717283, DOI: 10.1073/pnas.1900266116.Peer-Reviewed Original ResearchConceptsFemale gametesPerforin-like proteinBlood-stage growthIngestion of gametocytesProcess of gametogenesisPatatin-like phospholipaseGamete egressDiverse organismsMembrane remodelingIntracellular vesiclesVesicle secretionVesicular dischargeMale gametesOocyst formationPeripheral membraneGametocyte developmentGametogenesisExtensive membraneConditional deletionGametesBlood mealDevelopment of drugsDeletionPotential targetGenes
2025
A fluorescence-based assay for measuring aminopropyltransferase activity
https://doi.org/10.1016/bs.mie.2025.01.067Chapters
2024
A fluorescence-based assay for measuring polyamine biosynthesis aminopropyl transferase–mediated catalysis
Singh P, Choi J, Wang W, Lam T, Lechner P, Vanderwal C, Pou S, Nilsen A, Mamoun C. A fluorescence-based assay for measuring polyamine biosynthesis aminopropyl transferase–mediated catalysis. Journal Of Biological Chemistry 2024, 300: 107832. PMID: 39342998, PMCID: PMC11541840, DOI: 10.1016/j.jbc.2024.107832.Peer-Reviewed Original ResearchAminopropyl transferaseFluorescence-based assayLack of high-throughput assaysHigh-throughput screeningCarbon chain lengthChemical librariesMass spectrometryChain lengthHigh-throughput assayDrug discoveryMass spectrometry analysisSaccharomyces cerevisiaeThin-layer chromatographyFluorescence intensityCellular functionsSpectrometry analysisPolycationic moleculesFluorescent conjugatesIsoindoleAPT activityCatalysisAssayBenzeneAdductsEnzymeInsights into the evolution, virulence and speciation of Babesia MO1 and Babesia divergens through multiomics analyses
Singh P, Vydyam P, Fang T, Estrada K, Gonzalez L, Grande R, Kumar M, Chakravarty S, Berry V, Ranwez V, Carcy B, Depoix D, Sánchez S, Cornillot E, Abel S, Ciampossin L, Lenz T, Harb O, Sanchez-Flores A, Montero E, Le Roch K, Lonardi S, Mamoun C. Insights into the evolution, virulence and speciation of Babesia MO1 and Babesia divergens through multiomics analyses. Emerging Microbes & Infections 2024, 13: 2386136. PMID: 39148308, PMCID: PMC11370697, DOI: 10.1080/22221751.2024.2386136.Peer-Reviewed Original ResearchLeveraging genomic informationHuman babesiosisTick-borne diseasesDiseases of significanceCases of human babesiosisGenomic divergenceGenome sequenceGenomic informationMultigene familyGene functionBabesia divergensMammalian hostsAnimal healthMultiomics analysisZoonotic pathogensBabesiosisProtozoan parasitesVirulent strainsPathogensVertebrate hostsEnvironmental changesVirulenceReplication rateAntiparasitic drugsParasitesVitamin B5 metabolism is essential for vacuolar and mitochondrial functions and drug detoxification in fungi
Choi J, Gihaz S, Munshi M, Singh P, Vydyam P, Hamel P, Adams E, Sun X, Khalimonchuk O, Fuller K, Ben Mamoun C. Vitamin B5 metabolism is essential for vacuolar and mitochondrial functions and drug detoxification in fungi. Communications Biology 2024, 7: 894. PMID: 39043829, PMCID: PMC11266677, DOI: 10.1038/s42003-024-06595-7.Peer-Reviewed Original ResearchConceptsSusceptibility of fungiRegulation of genesMetabolism of fatty acidsVacuolar morphologySaccharomyces cerevisiaeAcetyl-CoAEukaryotic pathogensGenetic evidenceGenetic regulationCellular processesAntifungal drugsCo-enzyme ADrug detoxificationAntifungal therapyDrug-resistant strainsFungal infectionsMitochondrial functionFungiAmino acidsAR-12Vitamin B5Synthase activityPathwayExcellent targetGlobal health threat
2022
Epitope profiling of monoclonal antibodies to the immunodominant antigen BmGPI12 of the human pathogen Babesia microti
Chand M, Choi J, Pal A, Singh P, Kumari V, Thekkiniath J, Gagnon J, Timalsina S, Gaur G, Williams S, Ledizet M, Mamoun C. Epitope profiling of monoclonal antibodies to the immunodominant antigen BmGPI12 of the human pathogen Babesia microti. Frontiers In Cellular And Infection Microbiology 2022, 12: 1039197. PMID: 36506011, PMCID: PMC9732259, DOI: 10.3389/fcimb.2022.1039197.Peer-Reviewed Original ResearchConceptsMonoclonal antibodiesAntigen detection assaysMajor immunogenic determinantMost clinical casesReliable biomarkersAntibody combinationsImmunogenic determinantsIntraerythrocytic life cycleClinical casesUnique epitopesBabesia microtiEpitope profilingHuman babesiosisTick-borne diseasesSignificant riseSerological profilingPlasma samplesAntibodiesSerological characterizationProtozoan parasitePublic healthInfectionAntigenDiseaseMammalian hostsBabesia duncani in Culture and in Mouse (ICIM) Model for the Advancement of Babesia Biology, Pathogenesis, and Therapy.
Kumari V, Pal A, Singh P, Mamoun C. Babesia duncani in Culture and in Mouse (ICIM) Model for the Advancement of Babesia Biology, Pathogenesis, and Therapy. Bio-protocol 2022, 12 PMID: 36620533, PMCID: PMC9795036, DOI: 10.21769/bioprotoc.4549.Peer-Reviewed Original ResearchMouse modelHuman red blood cellsRed blood cellsC3H/HeJ miceBlood cellsHuman babesiosisMalaria-like illnessB. duncaniImportant health impactsTick-borne diseaseBlood transfusionTick biteLethal infectionHeJ miceRare caseBabesia duncaniImmunocompromised miceAnimal modelsHuman infectionsParasitic diseasesBabesia microtiDiseaseElderly peopleIntraerythrocytic parasitesB. microtiSpecific and Sensitive Diagnosis of Babesia microti Active Infection Using Monoclonal Antibodies to the Immunodominant Antigen BmGPI12
Gagnon J, Timalsina S, Choi JY, Chand M, Singh P, Lamba P, Gaur G, Pal AC, Mootien S, Marcos LA, Mamoun C, Ledizet M. Specific and Sensitive Diagnosis of Babesia microti Active Infection Using Monoclonal Antibodies to the Immunodominant Antigen BmGPI12. Journal Of Clinical Microbiology 2022, 60: e00925-22. PMID: 36040206, PMCID: PMC9491189, DOI: 10.1128/jcm.00925-22.Peer-Reviewed Original ResearchConceptsB. microti infectionActive infectionMonoclonal antibodiesMicroti infectionTime of diagnosisMalaria-like illnessUrgent public health concernAntigen capture assayHost red blood cellsPublic health concernCapture assayEvaluation of clearanceElderly patientsRed blood cellsBlood transfusionDrug treatmentEarly diagnosisPosttreatment samplesBabesia microtiHealth concernInfected humansInfectionDiagnosisBlood cellsHuman babesiosisAn Alternative Culture Medium for Continuous In Vitro Propagation of the Human Pathogen Babesia duncani in Human Erythrocytes
Singh P, Pal AC, Mamoun CB. An Alternative Culture Medium for Continuous In Vitro Propagation of the Human Pathogen Babesia duncani in Human Erythrocytes. Pathogens 2022, 11: 599. PMID: 35631120, PMCID: PMC9146245, DOI: 10.3390/pathogens11050599.Peer-Reviewed Original Research