Sameet Mehta, PhD
he/him/his
Associate Research ScientistAbout
Research
Publications
2026
Parkin deficiency impairs female fertility, oocyte development, fertilization and mitochondrial function in mice
Volovsky M, Rodríguez-Eguren A, Ergun Y, Yildirim R, Sahin G, Garcia Milian R, Mehta S, Turanli L, Cervelló I, Scott R, Seli E. Parkin deficiency impairs female fertility, oocyte development, fertilization and mitochondrial function in mice. Npj Aging 2026, 12: 33. PMID: 41571641, PMCID: PMC12916830, DOI: 10.1038/s41514-026-00332-6.Peer-Reviewed Original ResearchWild typeOocyte yieldMitochondrial E3 ubiquitin ligaseKO miceParkin deficiencyE3 ubiquitin ligaseMII oocyte countFemale fertilityUbiquitin ligaseCellular homeostasisExpressed genesFertilizing capacityRNA sequencingMitochondrial functionYoung miceOld miceParkinParkin deletionReproductive competenceOocyte countParkin knockoutMiceFemale reproductionPathway changesOverall fertility
2025
Tumor microenvironment of non-small cell lung cancer impairs immune cell function among people with HIV
Desai S, Salahuddin S, Yusuf R, Ranjan K, Gu J, Osmani L, Lin Y, Mehta S, Talmon R, Kang I, Kluger Y, Zhao H, Schalper K, Emu B. Tumor microenvironment of non-small cell lung cancer impairs immune cell function among people with HIV. Journal Of Clinical Investigation 2025, 135: e177310. PMID: 40459946, PMCID: PMC12259253, DOI: 10.1172/jci177310.Peer-Reviewed Original ResearchNon-small cell lung cancerTumor microenvironmentImmune cellsLung cancerCohort of non-small cell lung cancerExpression of PD-1Impairs anti-tumor responsesTumor-infiltrating CD8+Tumor-specific immune responsesCD4+ T cellsHIV-associated tumorsInfiltrating CD8+Expression of immunoregulatory moleculesAnti-tumor responsesTumor-associated macrophagesCell lung cancerImmune cell functionNSCLC cell linesPD-1Tumor killingBlocker therapyCD8+LAG-3Immune landscapeImmunoregulatory phenotype
2024
Early adversity causes sex-specific deficits in perforant pathway connectivity and contextual memory in adolescent mice
Islam R, White J, Arefin T, Mehta S, Liu X, Polis B, Giuliano L, Ahmed S, Bowers C, Zhang J, Kaffman A. Early adversity causes sex-specific deficits in perforant pathway connectivity and contextual memory in adolescent mice. Biology Of Sex Differences 2024, 15: 39. PMID: 38715106, PMCID: PMC11075329, DOI: 10.1186/s13293-024-00616-0.Peer-Reviewed Original ResearchConceptsLateral entorhinal cortexContextual fear conditioningDorsal hippocampusHippocampal developmentSex differencesFear conditioningEarly adversityLimited beddingSevere deficitsModel of early adversitySex-specific deficitsReelin-positive neuronsPerforant pathwayReelin-positive cellsDiffusion magnetic resonance imagingEx vivo diffusion magnetic resonance imagingContextual freezingContextual memoryAdolescent miceHippocampal functionLife adversityEntorhinal cortexHippocampusDeficitsAdolescent males
2020
Repeat tick exposure elicits distinct immune responses in guinea pigs and mice
Kurokawa C, Narasimhan S, Vidyarthi A, Booth CJ, Mehta S, Meister L, Diktas H, Strank N, Lynn GE, DePonte K, Craft J, Fikrig E. Repeat tick exposure elicits distinct immune responses in guinea pigs and mice. Ticks And Tick-borne Diseases 2020, 11: 101529. PMID: 32993942, PMCID: PMC7530331, DOI: 10.1016/j.ttbdis.2020.101529.Peer-Reviewed Original ResearchConceptsGuinea pigsElicit distinct immune responsesDistinct immune responsesGuinea pig modelLocal blood flowImmune animalsInflammatory pathwaysTick rejectionMechanisms of resistanceImmune responseMouse modelVaccine candidatesBite siteBlood flowPig modelCoagulation pathwayComplement activationAcquired ResistanceProtective antigenTick detachmentTick proteinsBlood mealMiceTick infestationRNA sequencingSingle-cell transcriptional landscapes reveal HIV-1–driven aberrant host gene transcription as a potential therapeutic target
Liu R, Yeh YJ, Varabyou A, Collora JA, Sherrill-Mix S, Talbot CC, Mehta S, Albrecht K, Hao H, Zhang H, Pollack RA, Beg SA, Calvi RM, Hu J, Durand CM, Ambinder RF, Hoh R, Deeks SG, Chiarella J, Spudich S, Douek DC, Bushman FD, Pertea M, Ho YC. Single-cell transcriptional landscapes reveal HIV-1–driven aberrant host gene transcription as a potential therapeutic target. Science Translational Medicine 2020, 12: eaaz0802. PMID: 32404504, PMCID: PMC7453882, DOI: 10.1126/scitranslmed.aaz0802.Peer-Reviewed Original ResearchConceptsHost gene transcriptionGene transcriptionLong terminal repeatHIV-1 reactivationCellular factorsIntegration sitesNonsense-mediated RNA decaySingle-cell transcriptional landscapePotential therapeutic targetSingle-cell transcriptome analysisHIV-1-host interactionsHIV-1HIV-1 promoterTherapeutic targetHIV-1 5' long terminal repeatRNA decayTranscriptional landscapeHIV-1-infected individualsHIV-1-infected cellsTranscriptome analysisAberrant transcriptionRNA transcriptionHost RNACellular survivalTranscription pathwayEndothelial cell–glucocorticoid receptor interactions and regulation of Wnt signaling
Zhou H, Mehta S, Srivastava SP, Grabinska K, Zhang X, Wong C, Hedayat A, Perrotta P, Fernández-Hernando C, Sessa WC, Goodwin JE. Endothelial cell–glucocorticoid receptor interactions and regulation of Wnt signaling. JCI Insight 2020, 5: e131384. PMID: 32051336, PMCID: PMC7098785, DOI: 10.1172/jci.insight.131384.Peer-Reviewed Original ResearchConceptsEndothelial glucocorticoid receptorVascular inflammationGlucocorticoid receptorGlucocorticoid receptor regulationGlucocorticoid receptor resultsUpregulation of WntEndogenous glucocorticoidsExogenous glucocorticoidsGlucocorticoid response elementCardiovascular diseaseMouse endothelial cellsMouse modelEndothelial WNTInflammationReceptor regulationEndothelial cellsReceptors resultsNext-generation sequencingReceptor interactionReceptorsRegulation of WntWnt pathwayGlucocorticoidsRecent dataWntChronic mTOR activation induces a degradative smooth muscle cell phenotype
Li G, Wang M, Caulk AW, Cilfone NA, Gujja S, Qin L, Chen PY, Chen Z, Yousef S, Jiao Y, He C, Jiang B, Korneva A, Bersi MR, Wang G, Liu X, Mehta S, Geirsson A, Gulcher JR, Chittenden TW, Simons M, Humphrey JD, Tellides G. Chronic mTOR activation induces a degradative smooth muscle cell phenotype. Journal Of Clinical Investigation 2020, 130: 1233-1251. PMID: 32039915, PMCID: PMC7269581, DOI: 10.1172/jci131048.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsAortaAortic Aneurysm, ThoracicAortic Dissectionbeta CateninDisease Models, AnimalLysosomesMechanistic Target of Rapamycin Complex 1MiceMice, Knockout, ApoEMicrophthalmia-Associated Transcription FactorMyocytes, Smooth MuscleSignal TransductionTOR Serine-Threonine KinasesTuberous Sclerosis Complex 1 ProteinConceptsMTOR activationMTOR complex 1Smooth muscle cell phenotypeMuscle cell phenotypeContext of hyperlipidemiaSmooth muscle cell proliferationThoracic aortic aneurysmDegradative organellesMuscle cell proliferationHematopoietic lineage markersSMC phenotypeLysosomal clearanceAdvanced diseaseMedial degenerationAortic diseaseLysosomal markersAortic aneurysmExtracellular matrixPhenotypic modulationConventional macrophagesMacrophage markersMedial SMCsConditional disruptionLineage markersImmune effectors
2019
Genomic sites hypersensitive to ultraviolet radiation
Premi S, Han L, Mehta S, Knight J, Zhao D, Palmatier MA, Kornacker K, Brash DE. Genomic sites hypersensitive to ultraviolet radiation. Proceedings Of The National Academy Of Sciences Of The United States Of America 2019, 116: 24196-24205. PMID: 31723047, PMCID: PMC6883822, DOI: 10.1073/pnas.1907860116.Peer-Reviewed Original ResearchMeSH Keywords5' Untranslated RegionsCells, CulturedDNA DamageFibroblastsGene Expression RegulationGenome, HumanHigh-Throughput Nucleotide SequencingHumansMelanocytesMelanomaMutationPromoter Regions, GeneticProtein BiosynthesisPyrimidine DimersPyrimidine NucleotidesSkin NeoplasmsTOR Serine-Threonine KinasesUltraviolet RaysConceptsCyclobutane pyrimidine dimersETS family transcription factorsIndividual gene promotersFamily transcription factorsRNA-binding proteinPrimary human melanocytesSingle-base resolutionEpigenetic marksGenomic averageTranslation regulationGenomic sitesMotif locationsTranscription factorsCell physiologyGene promoterCancer driversGenomeHuman melanocytesCell typesTumor evolutionCell pathwaysRare mutationsUV targetPyrimidine dimersApurinic sitesSuppressing miR-21 activity in tumor-associated macrophages promotes an antitumor immune response
Sahraei M, Chaube B, Liu Y, Sun J, Kaplan A, Price NL, Ding W, Oyaghire S, García-Milian R, Mehta S, Reshetnyak YK, Bahal R, Fiorina P, Glazer PM, Rimm DL, Fernández-Hernando C, Suárez Y. Suppressing miR-21 activity in tumor-associated macrophages promotes an antitumor immune response. Journal Of Clinical Investigation 2019, 129: 5518-5536. PMID: 31710308, PMCID: PMC6877327, DOI: 10.1172/jci127125.Peer-Reviewed Original ResearchConceptsTumor-associated macrophagesMiR-21 expressionTumor growthMiR-21Immune responseCytotoxic T cell responsesC motif chemokine 10Antitumor immune responseT cell responsesAntitumoral immune responseTumor immune infiltratesInduction of cytokinesPotential therapeutic implicationsMiR-21 inhibitionStages of carcinogenesisAngiostatic phenotypeTumor cell deathIL-12Immune infiltratesTherapeutic implicationsSolid tumorsTumor neovascularizationTumor progressionTumor microenvironmentTumor pathogenesisPrefrontal cortex interneurons display dynamic sex-specific stress-induced transcriptomes
Girgenti MJ, Wohleb ES, Mehta S, Ghosal S, Fogaca MV, Duman RS. Prefrontal cortex interneurons display dynamic sex-specific stress-induced transcriptomes. Translational Psychiatry 2019, 9: 292. PMID: 31712551, PMCID: PMC6848179, DOI: 10.1038/s41398-019-0642-z.Peer-Reviewed Original ResearchConceptsFluorescence-activated cell sortingInitiation factor 2Distinct transcriptome profilesTranslational machineryTranscriptome profilesEnriched pathwaysTranscriptional pathwaysTranscriptional profilesRNA sequencingDepressive-like behaviorSST interneuronsKey pathwaysChronic stressInterneuron subtypesSex-specific differencesPrefrontal cortexCell sortingSignificant dysregulationFactor 2PathwayStress-induced depressive-like behaviorDecreased expressionReporter miceGrowth factorNon-stressed females
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