2024
A deployable film method to enable replicable sampling of low-abundance environmental microbiomes
Mankiewicz Ledins P, Lin E, Bhattacharya C, Pollitt K, Dyson A, Hénaff E. A deployable film method to enable replicable sampling of low-abundance environmental microbiomes. Scientific Reports 2024, 14: 23857. PMID: 39394219, PMCID: PMC11470061, DOI: 10.1038/s41598-024-72341-y.Peer-Reviewed Original ResearchConceptsHuman healthPotential human health impactsHuman health impactsNegative long-term impactEnvironmental microbiomesTime indoorsEnvironmental nucleic acidsExposure studiesSequencing-based analysisChronic exposureHealth impactsHigher DNA yieldLong-term impactLow abundanceMicrobiome abundanceIndoor microbiome exposureSamplerMicrobiome samplesAbundanceIndoor microbiomeDNA yieldExtraction kitMicrobiomeSampling strategyGlobal population
2023
Daily Summer Temperatures and Hospitalization for Acute Cardiovascular Events: Impact of Outdoor PM2.5 Oxidative Potential on Observed Associations Across Canada
Weichenthal S, Lavigne E, You H, Pollitt K, Shin T, Kulka R, Stieb D, Hatzopoulou M, Evans G, Burnett R. Daily Summer Temperatures and Hospitalization for Acute Cardiovascular Events: Impact of Outdoor PM2.5 Oxidative Potential on Observed Associations Across Canada. Epidemiology 2023, 34: 897-905. PMID: 37732880, DOI: 10.1097/ede.0000000000001651.Peer-Reviewed Original ResearchConceptsIschaemic heart disease eventsHeart disease eventsAcute cardiovascular eventsCardiovascular eventsDisease eventsOdds ratioPotential time-varying confoundersAcute cardiovascular effectsFine particulate air pollutionCase-crossover studyOutdoor fine particulate air pollutionHealth impactsCardiovascular health impactsParticulate air pollutionCardiovascular effectsHighest tertileTime-varying confoundersOlder subjectsHospitalizationObserved associationsOxidative stressOxidative potentialPM2.5 oxidative potentialMonthsAssociationWithin-city spatial variations in long-term average outdoor oxidant gas concentrations and cardiovascular mortality: Effect modification by oxidative potential in the Canadian Census Health and Environment Cohort
Ripley S, Gao D, Pollitt K, Lakey P, Shiraiwa M, Hatzopoulou M, Weichenthal S. Within-city spatial variations in long-term average outdoor oxidant gas concentrations and cardiovascular mortality: Effect modification by oxidative potential in the Canadian Census Health and Environment Cohort. Environmental Epidemiology 2023, 7: e257. PMID: 37545813, PMCID: PMC10403014, DOI: 10.1097/ee9.0000000000000257.Peer-Reviewed Original ResearchCanadian Census HealthCardiovascular mortalityReactive oxygen species concentrationParticulate air pollutionEnvironment CohortMeasures of PMRetrospective cohort studyFine particulate air pollutionRelevant confounding factorsProportional hazards modelOutdoor fine particulate air pollutionPopulation health impactHealth impactsCardiovascular health impactsOutdoor air pollutionCardiovascular deathCohort studyOxidant gasesEffect modificationHazards modelConfounding factorsMortalityOxidative stressHealth effectsOxidative potential
2022
Long-term Exposure to Oxidant Gases and Mortality: Effect Modification by PM2.5 Transition Metals and Oxidative Potential
Toyib O, Lavigne E, Traub A, Umbrio D, You H, Ripley S, Pollitt K, Shin T, Kulka R, Jessiman B, Tjepkema M, Martin R, Stieb DM, Hatzopoulou M, Evans G, Burnett RT, Weichenthal S. Long-term Exposure to Oxidant Gases and Mortality: Effect Modification by PM2.5 Transition Metals and Oxidative Potential. Epidemiology 2022, 33: 767-776. PMID: 36165987, PMCID: PMC9531968, DOI: 10.1097/ede.0000000000001538.Peer-Reviewed Original ResearchConceptsLong-term exposureOxidative stressFine particulate air pollutionProportional hazards modelAir pollution health effectsHealth impactsObserved health impactsParticulate air pollutionCohort studyMortality outcomesOxidant gasesEffect modificationInterquartile increaseHazards modelAdverse health impactsNonaccidental mortalityGSH levelsHealth effectsMortalityLand use regression modelsOxidative potentialMedianRegression modelsExposurePM 2.5
2021
Association of Sulfur, Transition Metals, and the Oxidative Potential of Outdoor PM2.5 with Acute Cardiovascular Events: A Case-Crossover Study of Canadian Adults
Weichenthal S, Lavigne E, Traub A, Umbrio D, You H, Pollitt K, Shin T, Kulka R, Stieb DM, Korsiak J, Jessiman B, Brook JR, Hatzopoulou M, Evans G, Burnett RT. Association of Sulfur, Transition Metals, and the Oxidative Potential of Outdoor PM2.5 with Acute Cardiovascular Events: A Case-Crossover Study of Canadian Adults. Environmental Health Perspectives 2021, 129: 107005. PMID: 34644144, PMCID: PMC8513754, DOI: 10.1289/ehp9449.Peer-Reviewed Original ResearchConceptsAcute cardiovascular eventsCardiovascular eventsCase-crossover studyOdds ratioConditional logistic regression modelsFine particulate air pollutionLogistic regression modelsParticulate air pollutionStrength of associationCanadian adultsPopulation health risksObserved associationsRecent evidenceWeak associationOxidative potentialHealth impactsMenAssociationHealth risksMedian valueRegression modelsInfluence associationsAssociated health impactsSimilar patternOutdoor PM2.5
2020
Chapter sixteen Incorporating health impacts in transportation project decision-making in the United States
Christofa E, Esenther S, Pollitt K. Chapter sixteen Incorporating health impacts in transportation project decision-making in the United States. 2020, 343-369. DOI: 10.1016/b978-0-12-819136-1.00016-4.Peer-Reviewed Original Research
2018
Comparison of Airway Responses Induced in a Mouse Model by the Gas and Particulate Fractions of Gasoline Direct Injection Engine Exhaust
Maikawa CL, Zimmerman N, Ramos M, Shah M, Wallace JS, Pollitt KJG. Comparison of Airway Responses Induced in a Mouse Model by the Gas and Particulate Fractions of Gasoline Direct Injection Engine Exhaust. International Journal Of Environmental Research And Public Health 2018, 15: 429. PMID: 29494515, PMCID: PMC5876974, DOI: 10.3390/ijerph15030429.Peer-Reviewed Original ResearchConceptsAirway hyperresponsivenessAllergic asthma murine modelAsthma murine modelNon-allergic miceMethacholine responsivenessAirway responsesPulmonary responsePeripheral tissuesMurine modelMouse modelShort-term exposureAcute exposureGDI engine exhaustPolycyclic aromatic hydrocarbon metabolismUpregulation of genesHyperresponsivenessParticulate fractionHealth impactsAromatic hydrocarbon metabolismPrevalenceMiceExposureDiesel exhaustAnimalsResponse