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. panamensisChronicity of Dermal Leishmaniasis Caused by Leishmania panamensis Is Associated with Parasite-Mediated Induction of Chemokine Gene Expression
Navas A, Vargas DA, Freudzon M, McMahon-Pratt D, Saravia NG, Gómez MA. Chronicity of Dermal Leishmaniasis Caused by Leishmania panamensis Is Associated with Parasite-Mediated Induction of Chemokine Gene Expression. Infection And Immunity 2014, 82: 2872-2880. PMID: 24752514, PMCID: PMC4097649, DOI: 10.1128/iai.01133-13.Peer-Reviewed Original ResearchConceptsSelf-healed patientsChronic cutaneous leishmaniasisDermal leishmaniasisChemokine gene expressionClinical outcomesBiopsy specimensChronic diseasesInflammatory responseLeishmania panamensisExpression levelsCCR5 receptor geneInduction of CXCL5Montenegro skin testLesion biopsy specimensL. panamensisSelf-healing diseaseNew therapeutic targetsReverse transcription-quantitative PCRTranscription-quantitative PCRChemotactic chemokinesInflammation contributesSkin testAsymptomatic infectionInflammatory activationImmune cells
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
2012
Regulatory T Cells in the Pathogenesis and Healing of Chronic Human Dermal Leishmaniasis Caused by Leishmania (Viannia) Species
Rodriguez-Pinto D, Navas A, Blanco VM, Ramírez L, Garcerant D, Cruz A, Craft N, Saravia NG. Regulatory T Cells in the Pathogenesis and Healing of Chronic Human Dermal Leishmaniasis Caused by Leishmania (Viannia) Species. PLOS Neglected Tropical Diseases 2012, 6: e1627. PMID: 22545172, PMCID: PMC3335885, DOI: 10.1371/journal.pntd.0001627.Peer-Reviewed Original ResearchMeSH KeywordsAsymptomatic DiseasesCD4 AntigensChronic DiseaseFemaleFlow CytometryForkhead Transcription FactorsGene Expression ProfilingGlucocorticoid-Induced TNFR-Related ProteinHumansImmunophenotypingInterferon-gammaInterleukin-2 Receptor alpha SubunitInterleukin-7 Receptor alpha SubunitLeishmaniaLeishmaniasis, CutaneousMaleSkinT-Lymphocytes, RegulatoryConceptsRegulatory T cellsIFN-γ secretionDermal leishmaniasisPeripheral bloodT cellsSuppressive capacityCD4 T-cell frequenciesImpaired Treg functionParticipation of TregsT cell frequenciesExpression of Foxp3CD4 T cellsEnd of treatmentHealing of lesionsCdLS patientsSkin test sitesSite biopsiesTreg subsetsImmunotherapeutic strategiesTreg functionEffector cellsCutaneous lesionsFoxp3 expressionCutaneous responseInflammatory response
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