0000000000954635

AUTHOR

V Ghisetti

showing 8 related works from this author

Genotypic resistance profiles associated with virological failure to darunavir-containing regimens: a cross-sectional analysis.

2012

Introduction: This study aimed at defining protease (PR) resistance mutations associated with darunavir (DRV) failure and PR resistance evolution at DRV failure in a large database of treatment-experienced human immunodeficiency virus (HIV) patients. Results: Overall, 1,104 patients were included: 118 (10.7%) failed at a median observation time of 16 months. The mean number of PR mutations at baseline was 2.7, but it was higher in patients who subsequently failed DRV. In addition, the number of PR mutations increased at failure. The increase in the mean number of mutations was completely related to mutations considered to be associated with DRV resistance following the indications of the ma…

MaleTime FactorsCross-sectional studyHuman immunodeficiency virus (HIV)Drug ResistanceHIV InfectionsDrug resistancemedicine.disease_causeCohort StudiesAntiretroviral Therapy Highly ActiveRitonavir-boosted darunavirGenotypeHIV InfectionTreatment FailureViralGenotypic resistanceDarunavirSulfonamidesGeneral MedicineMiddle AgedVirological failureInfectious DiseasesFemaleHumanmedicine.drugAdultMicrobiology (medical)Logistic ModelTime FactorGenotypeAntiretroviral TherapySettore MED/17 - MALATTIE INFETTIVESulfonamideDrug Resistance ViralmedicineHumansHighly ActiveDarunavir; Genotypic resistance; Protease inhibitors; Ritonavir-boosted darunavir; Adult; Antiretroviral Therapy Highly Active; Cohort Studies; Cross-Sectional Studies; Female; Genotype; HIV Infections; HIV Protease Inhibitors; HIV-1; Humans; Logistic Models; Male; Middle Aged; Mutation; Sulfonamides; Time Factors; Treatment Failure; Drug Resistance Viral; Microbiology (medical); Infectious DiseasesHIV Protease InhibitorDarunavirCross-Sectional Studiebusiness.industryHIV Protease InhibitorsProtease inhibitorsAntiretroviral therapyVirologyCross-Sectional StudiesLogistic ModelsProtease inhibitorMutationGenotypic resistanceHIV-1Cohort Studiebusiness
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Detection of drug resistance mutations at low plasma HIV-1 RNA load in a European multicentre cohort study

2011

Background and objectives: Guidelines indicate a plasma HIV-1 RNA load of 500-1000 copies/mL as the minimal threshold for antiretroviral drug resistance testing. Resistance testing at lower viral load levels may be useful to guide timely treatment switches, although data on the clinical utility of this remain limited. We report here the influence of viral load levels on the probability of detecting drug resistance mutations (DRMs) and other mutations by routine genotypic testing in a large multicentre European cohort, with a focus on tests performed at a viral load <1000 copies/mL. Methods: A total of 16511 HIV-1 reverse transcriptase and protease sequences from 11492 treatment-experienced …

MaleDrug ResistanceHIV InfectionsDrug resistanceCohort Studies0302 clinical medicineGenotypeHIV InfectionPharmacology (medical)030212 general & internal medicineViral0303 health sciencesProteolytic enzymesGenotypic testing; HIV; Viral load; Adult; Anti-HIV Agents; CD4 Lymphocyte Count; Cohort Studies; Europe; Female; Genotype; HIV Infections; HIV-1; Humans; Male; RNA Viral; Viral Proteins; Drug Resistance Viral; Mutation Missense; Viral Load; Pharmacology; Pharmacology (medical); Infectious DiseasesViral LoadGenotypic testing3. Good healthEuropeInfectious DiseasesCohortRNA ViralFemaleViral loadCohort studyHumanMicrobiology (medical)AdultGenotypeAnti-HIV AgentsMutation MissenseBiologySettore MED/17 - MALATTIE INFETTIVE03 medical and health sciencesViral ProteinsSDG 3 - Good Health and Well-beingDrug Resistance ViralHumansViral ProteinPharmacology030306 microbiologyHIVAnti-HIV AgentVirologyReverse transcriptaseCD4 Lymphocyte CountRegimenHIV; genotypic testing; viral loadGenotypic testing; HIV; Viral load; Adult; Anti-HIV Agents; CD4 Lymphocyte Count; Cohort Studies; Drug Resistance Viral; Europe; Female; Genotype; HIV Infections; HIV-1; Humans; Male; Mutation Missense; RNA Viral; Viral Load; Viral ProteinsImmunologyMutationHIV-1RNAMissenseCohort Studie
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A novel methodology for large-scale phylogeny partition

2011

Understanding the determinants of virus transmission is a fundamental step for effective design of screening and intervention strategies to control viral epidemics. Phylogenetic analysis can be a valid approach for the identification of transmission chains, and very-large data sets can be analysed through parallel computation. Here we propose and validate a new methodology for the partition of large-scale phylogenies and the inference of transmission clusters. This approach, on the basis of a depth-first search algorithm, conjugates the evaluation of node reliability, tree topology and patristic distance analysis. The method has been applied to identify transmission clusters of a phylogeny …

Genetics and Molecular Biology (all)MalepolTheoretical computer scienceInferenceGene Products polGeneral Physics and AstronomyHIV InfectionsBiologyNetwork topologySettore MED/17 - MALATTIE INFETTIVEBiochemistryArticleGeneral Biochemistry Genetics and Molecular Biology03 medical and health sciencesPhysics and Astronomy (all)0302 clinical medicineSearch algorithmphylogenetic analysis; virus transmissionGene ProductsHumansHIV Infection030212 general & internal medicinePhylogeny030304 developmental biologyAlgorithms; Classification; Female; Gene Products pol; HIV Infections; HIV-1; Humans; Male; Phylogeny; Biochemistry Genetics and Molecular Biology (all); Chemistry (all); Physics and Astronomy (all)Genetics0303 health sciencesBiochemistry Genetics and Molecular Biology (all)MultidisciplinaryPhylogenetic treeNode (networking)phylogenetic analysisChemistry (all)HIVGeneral Chemistryvirus transmissionClassificationPartition (database)AlgorithmIdentification (information)Transmission (telecommunications)HIV-1FemaleMETHODOLOGYAlgorithmsHumanNature Communications
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Molecular surveillance of pandemic influenza A(H1N1) viruses circulating in Italy from May 2009 to February 2010: association between haemagglutinin …

2010

Haemagglutinin sequences of pandemic influenza A(H1N1) viruses circulating in Italy were examined, focusing on amino acid changes at position 222 because of its suggested pathogenic relevance. Among 169 patients, the D222G substitution was detected in three of 52 (5.8%) severe cases and in one of 117 (0.9%) mild cases, whereas the D222E mutation was more frequent and evenly distributed in mild (31.6%) and severe cases (38.4%). A cluster of D222E viruses among school children confirms reported human-to-human transmission of viruses mutated at amino acid position 222.

MaleMolecular surveillance; Pandemic influenza A(H1N1); Haemagglutinin mutations; Italy from May 2009 to February 2010pandemic influenzasurveillance of pandemic influenza A(H1N1); Molecular surveillance; pandemic influenzaEpidemiologyvirusesHaemagglutinin mutationssurveillance of pandemic influenza A(H1N1)Settore MED/42 - Igiene Generale E Applicatamedicine.disease_causeSeverity of Illness IndexInfluenza A Virus H1N1 SubtypePandemic influenza A(H1N1)PandemicInfluenza A VirusA(H1N1)ChildMutationReverse Transcriptase Polymerase Chain ReactionTransmission (medicine)Adolescent; Adult; Age Distribution; Aged; Amino Acid Substitution; Child; Child Preschool; Female; Hemagglutinins; Humans; Infant; Influenza A Virus H1N1 Subtype; Influenza Human; Italy; Male; Middle Aged; Mutation; Population Surveillance; Reverse Transcriptase Polymerase Chain Reaction; Severity of Illness Index; Sex Distribution; Young Adult; PandemicsMiddle AgedItaly from May 2009 to February 2010Molecular surveillance; pandemic influenza; A(H1N1); Italy; haemagglutinin mutationsHemagglutininsMolecular surveillanceItalyChild PreschoolPopulation SurveillanceFemaleHumanAdultAdolescentBiologyDisease clusterDisease courseYoung AdultAge DistributionVirologyInfluenza HumanmedicineHumansH1N1 SubtypeSex DistributionPreschoolhaemagglutinin mutationsPandemicsAgedMolecular epidemiologyPublic Health Environmental and Occupational HealthPandemic influenzaInfantVirologyInfluenzaMutational analysisAmino Acid SubstitutionMutationEurosurveillance
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Declining Prevalence of HIV-1 Drug Resistance in Antiretroviral Treatment-exposed Individuals in Western Europe

2013

HIV-1 drug resistance represents a major obstacle to infection and disease control. This retrospective study analyzes trends and determinants of resistance in antiretroviral treatment (ART)-exposed individuals across 7 countries in Europe. Of 20 323 cases, 80% carried at least one resistance mutation: these declined from 81% in 1997 to 71% in 2008. Predicted extensive 3-class resistance was rare (3.2% considering the cumulative genotype) and peaked at 4.5% in 2005, decreasing thereafter. The proportion of cases exhausting available drug options dropped from 32% in 2000 to 1% in 2008. Reduced risk of resistance over calendar years was confirmed by multivariable analysis. © 2013 The Author.

MaleMultivariate analysisDatabases FactualDrug ResistanceHIV InfectionsDrug resistance0302 clinical medicineRetrospective StudieRisk FactorsEpidemiologyGenotypepol Gene Products Human Immunodeficiency ViruOdds RatioPrevalenceImmunology and AllergyHIV Infection030212 general & internal medicinepol Gene ProductsViralMultivariate Analysimedia_common0303 health sciencesDrug Resistance Prevalence HIV-1Middle AgedResistance mutation3. Good healthReverse Transcriptase InhibitorEuropeInfectious DiseasesReverse Transcriptase InhibitorsepidemiologyFemaleMultipleHuman Immunodeficiency VirusHumanDrugAdultmedicine.medical_specialtyGenotypeEvolutionmedia_common.quotation_subjectSexual Behaviorantiretroviral therapyInfectious DiseaseBiologySettore MED/17 - MALATTIE INFETTIVEEvolution Molecular03 medical and health sciencesDatabasesSDG 3 - Good Health and Well-beingDrug Resistance Multiple ViralmedicineHumansHIV Protease InhibitorFactualRetrospective Studies030306 microbiologyRisk FactorMolecularRetrospective cohort studyOdds ratioHIV Protease InhibitorsCD4 Lymphocyte Countantiretroviral therapy; drug resistance; epidemiology; genotyping; HIV-1; Adult; CD4 Lymphocyte Count; Databases Factual; Europe; Evolution Molecular; Female; Genotype; HIV Infections; HIV Protease Inhibitors; HIV-1; Humans; Male; Middle Aged; Multivariate Analysis; Mutation; Odds Ratio; Prevalence; Retrospective Studies; Reverse Transcriptase Inhibitors; Risk Factors; Sexual Behavior; pol Gene Products Human Immunodeficiency Virus; Drug Resistance Multiple Viral; Immunology and Allergy; Infectious Diseasesgenotypingpol Gene Products Human Immunodeficiency VirusImmunologyMultivariate AnalysisMutationHIV-1DemographyJournal of Infectious Diseases
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Low Rate of Virological Failure and Maintenance of Susceptibility to HIV-1 Protease Inhibitors with First-Line Lopinavir/Ritonavir-Based Antiretrovir…

2010

Protease inhibitor (PI)-resistant HIV-1 has hardly ever been detected at failed boosted PI-based first-line antiretroviral regimens in clinical trials. However, this phenomenon has not been investigated in clinical practice. To address this gap, data from patients starting a first-line lopinavir/ritonavir (LPV/rtv)-based therapy with available baseline HIV-1 RNA load, a viral genotype and follow-up viral load after 3 and 6 months of treatment were extracted from the Italian Antiretroviral Resistance Cohort Analysis (ARCA) observational database. Based on survival analysis, 39 (7.1%) and 43 (7.8%) of the 548 examined patient cases had an HIV-1 RNA >500 and >50 copies/ml, respectively, after …

MaleLopinavir/ritonavirHIV Infectionsboosted protease inhibitorLopinavirCohort Studies0302 clinical medicineAntiretroviral Therapy Highly Activevirologic failureHIV InfectionTreatment Failure030212 general & internal medicinePyrimidinone0303 health scienceseducation.field_of_studylopinavir/ritonavirLopinavirViral LoadResistance mutationfirst-line antiretroviral therapyReverse Transcriptase Inhibitor3. Good healthTreatment OutcomeInfectious DiseasesRNA ViralReverse Transcriptase InhibitorsMedicineDrug Therapy CombinationFemaleSurvival AnalysiViral loadHumanmedicine.drugAnti-HIV AgentsPopulationPyrimidinones.Settore MED/17 - MALATTIE INFETTIVEEmtricitabinehuman immunodeficiency virus type 103 medical and health sciencesVirologyDrug Resistance Viralantiretroviral drug resistancemedicineHumansProtease inhibitor (pharmacology)educationHIV Protease InhibitorRitonavir030306 microbiologybusiness.industryAnti-HIV AgentHIV Protease InhibitorsSurvival AnalysisVirologyHIV-1RitonavirCohort Studiebusiness
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Interim 2017/18 influenza seasonal vaccine effectiveness: combined results from five European studies

2018

Between September 2017 and February 2018, influenza A(H1N1)pdm09, A(H3N2) and B viruses (mainly B/Yamagata, not included in 2017/18 trivalent vaccines) co-circulated in Europe. Interim results from five European studies indicate that, in all age groups, 2017/18 influenza vaccine effectiveness was 25 to 52% against any influenza, 55 to 68% against influenza A(H1N1)pdm09, -42 to 7% against influenza A(H3N2) and 36 to 54% against influenza B. 2017/18 influenza vaccine should be promoted where influenza still circulates. Funding: The five studies have received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 634446 to conduct the study in…

0301 basic medicineMalePediatricsEpidemiologyvirusesInfluenza B viruinfluenza ; influenza vaccine effectiveness ; influenza vaccination ; case control study ; multicentre study ; EuropeEurope case control study influenza influenza vaccination influenza vaccine effectiveness multicentre study0302 clinical medicineInfluenza A Virus H1N1 Subtype[SDV.MHEP.MI]Life Sciences [q-bio]/Human health and pathology/Infectious diseasesInteriminfluenza vaccine effectivenessEpidemiologyPandemicInfluenza A Virus030212 general & internal medicineQAInfluenza vaccine effectivenessChildmedia_commonVaccine EffectivenessVaccinationvirus diseasesMiddle Agedinfluenza vaccinationmulticentre study3. Good healthVaccinationEuropeTreatment OutcomeInfluenza VaccinesChild PreschoolH3N2 SubtypeFemaleSeasonsInfluenza VaccineinfluenzaRapid CommunicationHumanAdultRMmedicine.medical_specialtyAdolescentInfluenza vaccine030106 microbiologyCase control studyMulticentre studyEuropean studiesSettore MED/07 - MICROBIOLOGIA E MICROBIOLOGIA CLINICA03 medical and health sciencesVirologyInfluenza Humanmedicinemedia_common.cataloged_instanceHumansH1N1 SubtypeVacina AntigripalEuropean UnionEuropean unionPreschoolPandemicsAgedPandemicInfluenza A Virus H3N2 SubtypeCuidados de SaúdePublic Health Environmental and Occupational HealthInfant NewbornInfantInfluenza ainfluenza vaccine effectivenecase control studyNewbornEurope; case control study; influenza; influenza vaccination; influenza vaccine effectiveness; multicentre studyInfluenzarespiratory tract diseasesInfluenza vaccinationInfluenza B virusEurope; case control study; influenza; influenza vaccination; influenza vaccine effectiveness; multicentre study; Adolescent; Adult; Aged; Child; Child Preschool; Europe; European Union; Female; Humans; Infant; Infant Newborn; Influenza A Virus H1N1 Subtype; Influenza A Virus H3N2 Subtype; Influenza B virus; Influenza Vaccines; Influenza Human; Male; Middle Aged; Pandemics; Treatment Outcome; Vaccination; Seasons[SDV.SPEE]Life Sciences [q-bio]/Santé publique et épidémiologieDeterminantes da Saúde e da Doença[SDV.IMM.VAC]Life Sciences [q-bio]/Immunology/Vaccinology
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No pol mutation is associated independently with the lack of immune recovery in patients infected with HIV and failing antiretroviral therapy

2011

An investigation was undertaken to determine whether specific pol mutations hinder long-term immune recovery regardless of virological response. In total, 826 patients with >50 HIV RNA copies/ml, who underwent genotypic resistance testing between 1 January 2000 and 31 December 2003 after >3 years of antiretroviral treatment, and were followed up for >3 years after genotypic resistance testing, were analyzed retrospectively. The outcome of the study was the lack of immune recovery after >3 years of follow-up, defined as a slope by linear regression 50 copies/ml divided by the number of HIV RNA measurements during follow-up. Logistic regression was used for univariable and multivariable analy…

MaleHIV InfectionsDrug resistanceLogistic regressionResistance to nucleoside reverse transcriptase inhibitorCD4+ T-lymphocyteRetrospective StudieImmunopathologyAntiretroviral Therapy Highly ActiveResistance to non-nucleoside reverse transcriptase inhibitorgeneticsResistance to protease inhibitorHIV Infectionresistance to nucleoside reverse transcriptase inhibitorsViralSidaresistance to protease inhibitorsbiologyReverse-transcriptase inhibitorViral LoadGenes poldrug therapy/immunology/virologyReverse Transcriptase InhibitorInfectious DiseasesTreatment Outcomeresistance to non-nucleoside reverse transcriptase inhibitorsReverse Transcriptase InhibitorsFemaleViral loadmedicine.drugHumanpolAnti-HIV AgentsAntiretroviral TherapyViremiaInfectious DiseaseSettore MED/17 - MALATTIE INFETTIVEpharmacology/therapeutic useAcquired immunodeficiency syndrome (AIDS)VirologyDrug Resistance ViralmedicineHumansHighly ActiveRetrospective StudiesAnti-HIV Agents; pharmacology/therapeutic use Antiretroviral Therapy; Highly Active CD4 Lymphocyte Count Drug Resistance; Viral; genetics Female Genes; pol HIV Infections; drug therapy/immunology/virology HIV-1; drug effects/enzymology/genetics Humans Male Mutation Retrospective Studies Reverse Transcriptase Inhibitors; therapeutic use Treatment Outcome Viral Loaddrug resistanceAnti-HIV Agentbiology.organism_classificationmedicine.diseaseVirologyCD4 Lymphocyte CountGenesdrug effects/enzymology/geneticstherapeutic useMutationCD4+ T-lymphocytesHIV-1
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