2024
CD4 downregulation precedes Env expression and protects HIV-1-infected cells from ADCC mediated by non-neutralizing antibodies
Richard J, Sannier G, Zhu L, Prévost J, Marchitto L, Benlarbi M, Beaudoin-Bussières G, Kim H, Sun Y, Chatterjee D, Medjahed H, Bourassa C, Delgado G, Dubé M, Kirchhoff F, Hahn B, Kumar P, Kaufmann D, Finzi A. CD4 downregulation precedes Env expression and protects HIV-1-infected cells from ADCC mediated by non-neutralizing antibodies. MBio 2024, 15: e01827-24. PMID: 39373535, PMCID: PMC11559134, DOI: 10.1128/mbio.01827-24.Peer-Reviewed Original ResearchAntibody-dependent cellular cytotoxicityProductively infected cellsEnv-CD4 interactionNon-neutralizing antibodiesHIV-1CD4 downmodulationEnv expressionCellular cytotoxicityResistance to antibody-dependent cellular cytotoxicityHIV-1-infected humanized miceInfected cellsHIV-1 cure strategiesHIV-1 mRNA expressionHIV-1-infected cellsCD4+ T cellsHIV-1 envelope glycoproteinMRNA expressionADCC-mediating antibodiesNon-neutralizing AbsCell surface CD4HIV-1 isolatesImmunotherapy-based strategiesMultiparametric flow cytometryVirally infected cellsEffective immune responseBeta Spike-Presenting SARS-CoV-2 Virus-like Particle Vaccine Confers Broad Protection against Other VOCs in Mice
Ullah I, Symmes K, Keita K, Zhu L, Grunst M, Li W, Mothes W, Kumar P, Uchil P. Beta Spike-Presenting SARS-CoV-2 Virus-like Particle Vaccine Confers Broad Protection against Other VOCs in Mice. Vaccines 2024, 12: 1007. PMID: 39340037, PMCID: PMC11435481, DOI: 10.3390/vaccines12091007.Peer-Reviewed Original ResearchImmune responseVirus-like particlesBeta spikesCross-protective immune responsesSARS-CoV-2 immunitySARS-CoV-2Effective immune responseEffective humoral immune responseHumoral immune responseAncestral spikeT cellsVaccination regimenSARS-CoV-2 virus-like particlesVaccine platformMouse modelVariant spike proteinsOmicron spikeBeta variantDisease burdenNon-infectiousReduce virus spreadImmunityVariant spikesFusion glycoproteinSpike protein
2023
Immunogenicity and Pre-Clinical Efficacy of an OMV-Based SARS-CoV-2 Vaccine
Grandi A, Tomasi M, Ullah I, Bertelli C, Vanzo T, Accordini S, Gagliardi A, Zanella I, Benedet M, Corbellari R, Di Lascio G, Tamburini S, Caproni E, Croia L, Ravà M, Fumagalli V, Di Lucia P, Marotta D, Sala E, Iannacone M, Kumar P, Mothes W, Uchil P, Cherepanov P, Bolognesi M, Pizzato M, Grandi G. Immunogenicity and Pre-Clinical Efficacy of an OMV-Based SARS-CoV-2 Vaccine. Vaccines 2023, 11: 1546. PMID: 37896949, PMCID: PMC10610814, DOI: 10.3390/vaccines11101546.Peer-Reviewed Original ResearchSARS-CoV-2 vaccinesSARS-CoV-2Outer membrane vesiclesImmune responseSARS-CoV-2 elicitsSARS-CoV-2 variantsPotent immune responsesEffective immune responsePre-clinical efficacyDiverse SARS-CoV-2 variantsInherent adjuvanticityVaccinated miceIntranasal challengeVaccine dosesNeutralization titresEffective vaccineVirus infectionVaccination campaignHeterologous antigensVaccineVirus replicationSpike proteinInfectivity assaysTitresPotential need