2017
Profiling gene expression of antimony response genes in Leishmania (Viannia) panamensis and infected macrophages and its relationship with drug susceptibility
Barrera MC, Rojas LJ, Weiss A, Fernandez O, McMahon-Pratt D, Saravia NG, Gomez MA. Profiling gene expression of antimony response genes in Leishmania (Viannia) panamensis and infected macrophages and its relationship with drug susceptibility. Acta Tropica 2017, 176: 355-363. PMID: 28843396, PMCID: PMC5633519, DOI: 10.1016/j.actatropica.2017.08.017.Peer-Reviewed Original ResearchConceptsLeishmania resistanceDrug susceptibilityDrug resistanceHost cell gene expressionClinical strainsCell gene expressionExpression of ABCA2THP-1 cellsPrimary human macrophagesLeishmania susceptibilityGene expressionAntimonial drugsCutaneous leishmaniasisInfected macrophagesLeishmania panamensisIntracellular amastigotesHuman macrophagesResistant strainsSusceptible parasitesAntimonialsIntracellular parasitesLeishmania speciesMacrophagesL. panamensisAQP-9
2014
Miltefosine and Antimonial Drug Susceptibility of Leishmania Viannia Species and Populations in Regions of High Transmission in Colombia
Fernández OL, Diaz-Toro Y, Ovalle C, Valderrama L, Muvdi S, Rodríguez I, Gomez MA, Saravia NG. Miltefosine and Antimonial Drug Susceptibility of Leishmania Viannia Species and Populations in Regions of High Transmission in Colombia. PLOS Neglected Tropical Diseases 2014, 8: e2871. PMID: 24853871, PMCID: PMC4031164, DOI: 10.1371/journal.pntd.0002871.Peer-Reviewed Original ResearchConceptsV. panamensisLine treatmentClinical strainsDrug susceptibilitySecond-line treatmentFirst-line treatmentEmergence of resistancePopulations of LeishmaniaViannia speciesResistant clinical strainsAntimony susceptibilityClinical evidenceMeglumine antimoniatePentavalent antimonialsDermal leishmaniasisEpidemiologic differencesLeishmania VianniaProxy markerIntracellular amastigotesMunicipality of TumacoResistant strainsMiltefosineDisparate susceptibilityDrugsL. panamensis
2013
Treatment Failure and Miltefosine Susceptibility in Dermal Leishmaniasis Caused by Leishmania Subgenus Viannia Species
Obonaga R, Fernández O, Valderrama L, Rubiano L, del Mar Castro M, Barrera M, Gomez M, Saravia N. Treatment Failure and Miltefosine Susceptibility in Dermal Leishmaniasis Caused by Leishmania Subgenus Viannia Species. Antimicrobial Agents And Chemotherapy 2013, 58: 144-152. PMID: 24145529, PMCID: PMC3910710, DOI: 10.1128/aac.01023-13.Peer-Reviewed Original ResearchMeSH KeywordsAdolescentAdultATP Binding Cassette Transporter, Subfamily GATP-Binding Cassette TransportersChildDrug ResistanceFemaleHumansLeishmaniaLeishmaniasis, CutaneousMaleMiddle AgedMultidrug Resistance-Associated Protein 2Multidrug Resistance-Associated ProteinsPhosphorylcholineProspective StudiesTreatment FailureYoung AdultConceptsTreatment failureDermal leishmaniasisQuantitative reverse transcription PCRLoss of susceptibilityMiltefosine susceptibilityDrug susceptibilityIntracellular amastigotesL. panamensis infectionsL. braziliensis infectionPanamensis infectionMucocutaneous diseaseMiltefosine treatmentBraziliensis infectionCutaneous lesionsProspective evaluationMucosal diseaseDrug exposureReverse transcription-PCRClinical failureIndividual patientsGene polymorphismsLeishmania panamensisConcurrent conditionsDecreased expressionTransporter expression
2010
Viability and Burden of Leishmania in Extralesional Sites during Human Dermal Leishmaniasis
Romero I, Téllez J, Suárez Y, Cardona M, Figueroa R, Zelazny A, Saravia N. Viability and Burden of Leishmania in Extralesional Sites during Human Dermal Leishmaniasis. PLOS Neglected Tropical Diseases 2010, 4: e819. PMID: 20856851, PMCID: PMC2939031, DOI: 10.1371/journal.pntd.0000819.Peer-Reviewed Original ResearchConceptsLeishmaniasis patientsExtralesional sitesNormal skinTonsil swabsViable parasitesDissemination of LeishmaniaMucocutaneous leishmaniasis patientsMonocyte samplesPositive samplesLuciferase activityParasite viabilitySkin aspiratesActive diseaseDermal leishmaniasisHuman leishmaniasisBlood monocytesEpidemiologic investigationsPatientsLeishmania DNAParasite burdenHuman infectionsIntracellular amastigotesLesionsSwabsEpidemiological significance
2008
Antimony Resistance and Trypanothione in Experimentally Selected and Clinical Strains of Leishmania panamensis
Goyeneche-Patino DA, Valderrama L, Walker J, Saravia NG. Antimony Resistance and Trypanothione in Experimentally Selected and Clinical Strains of Leishmania panamensis. Antimicrobial Agents And Chemotherapy 2008, 52: 4503-4506. PMID: 18824610, PMCID: PMC2592887, DOI: 10.1128/aac.01075-08.Peer-Reviewed Original Research
2006
Resistance to Antimony and Treatment Failure in Human Leishmania (Viannia) Infection
Rojas R, Valderrama L, Valderrama M, Varona MX, Ouellette M, Saravia NG. Resistance to Antimony and Treatment Failure in Human Leishmania (Viannia) Infection. The Journal Of Infectious Diseases 2006, 193: 1375-1383. PMID: 16619185, DOI: 10.1086/503371.Peer-Reviewed Original ResearchConceptsTreatment failureMeglumine antimoniatePrimary resistanceAntimonial drugsSecondary resistanceDrug resistanceHuman Leishmania infectionsEffective immune responseAnthroponotic visceral leishmaniasisAmerican cutaneous leishmaniasisAntimonial therapyStandard treatmentCutaneous diseaseLeishmania infectionTherapeutic responseImmune responseCutaneous leishmaniasisVisceral leishmaniasisAnthroponotic transmissionResistant organismsEffective doseIntracellular amastigotesSusceptible strainsAntimoniatePatients
2005
Role of the ABC Transporter MRPA (PGPA) in Antimony Resistance in Leishmania infantum Axenic and Intracellular Amastigotes
Fadili K, Messier N, Leprohon P, Roy G, Guimond C, Trudel N, Saravia NG, Papadopoulou B, Légaré D, Ouellette M. Role of the ABC Transporter MRPA (PGPA) in Antimony Resistance in Leishmania infantum Axenic and Intracellular Amastigotes. Antimicrobial Agents And Chemotherapy 2005, 49: 1988-1993. PMID: 15855523, PMCID: PMC1087671, DOI: 10.1128/aac.49.5.1988-1993.2005.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsAntimonyAntimony Sodium GluconateATP-Binding Cassette TransportersCell LineCysteineDNA, ProtozoanDrug ResistanceGlutathioneLeishmania infantumMembrane GlycoproteinsMicroscopy, ConfocalMonocytesOligonucleotide Array Sequence AnalysisProtozoan ProteinsRibonucleoproteinsSaccharomyces cerevisiae ProteinsSpermidineTransfectionConceptsABC transporter MRPAAntimony resistanceSodium stibogluconate (SSG) resistanceTreatment of infectionsMRPA geneSodium stibogluconateAntimonial compoundsMain drugsAmastigote parasitesPutative alterationsIntracellular amastigotesLevel of expressionProtozoan parasite LeishmaniaIntracellular parasitesAxenic amastigotesButhionine sulfoximineLevels of cysteineAmastigote stageDNA microarraysS-adenosylhomocysteine hydrolaseParasite LeishmaniaPotassium antimonyl tartrateAmastigotesLeishmaniaGenes
2000
Distinct Innate and Acquired Immune Responses to Leishmania in Putative Susceptible and Resistant Human Populations Endemically Exposed to L. (Viannia) panamensis Infection
Bosque, Saravia, Valderrama, Milon. Distinct Innate and Acquired Immune Responses to Leishmania in Putative Susceptible and Resistant Human Populations Endemically Exposed to L. (Viannia) panamensis Infection. Scandinavian Journal Of Immunology 2000, 51: 533-541. PMID: 10792848, DOI: 10.1046/j.1365-3083.2000.00724.x.Peer-Reviewed Original ResearchMeSH KeywordsAdolescentAdultAnimalsCD4-Positive T-LymphocytesCD8-Positive T-LymphocytesCells, CulturedDisease SusceptibilityEndemic DiseasesFemaleHumansHypersensitivity, DelayedImmunity, InnateInterferon-gammaInterleukin-10Leishmania guyanensisLeishmaniasis, MucocutaneousMacrophagesMaleMiddle AgedMonocytesRecombinant ProteinsRecurrenceRisk FactorsTritiumTumor Necrosis Factor-alphaConceptsPeripheral blood mononuclear cellsRecurrent diseaseL. panamensis infectionsCD8 T lymphocytesType hypersensitivity responseBlood mononuclear cellsAcquired Immune ResponsesTumor necrosis factorProduction of interferonEntry of parasitesLeishmania Viannia panamensisPanamensis infectionRecurrent leishmaniasisHypersensitivity responseImmunological basisSkin testMononuclear cellsNecrosis factorT lymphocytesImmune responseSubclinical infectionLinear regression analysisEvidence of differencesDistinct innateIntracellular amastigotes