2024
The thermoneutral zone in women takes an “arctic” shift compared to men
Brychta R, McGehee S, Huang S, Leitner B, Duckworth C, Fletcher L, Kim K, Cassimatis T, Israni N, Lea H, Lentz T, Pierce A, Jiang A, LaMunion S, Thomas R, Ishihara A, Courville A, Yang S, Reitman M, Cypess A, Chen K. The thermoneutral zone in women takes an “arctic” shift compared to men. Proceedings Of The National Academy Of Sciences Of The United States Of America 2024, 121: e2311116121. PMID: 38683977, PMCID: PMC11087792, DOI: 10.1073/pnas.2311116121.Peer-Reviewed Original Research
2020
Sexual Dimorphisms in Adult Human Brown Adipose Tissue
Fletcher L, Kim K, Leitner B, Cassimatis T, O’Mara A, Johnson J, Halprin M, McGehee S, Brychta R, Cypess A, Chen K. Sexual Dimorphisms in Adult Human Brown Adipose Tissue. Obesity 2020, 28: 241-246. PMID: 31970907, PMCID: PMC6986330, DOI: 10.1002/oby.22698.Peer-Reviewed Original ResearchConceptsBrown adipose tissueF-fluorodeoxyglucose uptakeBAT volumeAdipose tissueAdult human brown adipose tissueCold-activated brown adipose tissueInterscapular brown adipose tissueGlucose uptakeTotal BAT volumeHuman brown adipose tissueBAT glucose uptakeBody weight regulationPositron emission tomographyOvert shiveringDistribution of BATLean womenAnatomical distributionBAT depotsWeight regulationHours of exposureHuman newbornsComputerized tomographyEmission tomographyYoung womenWomen
2019
Quantification of the Capacity for Cold-Induced Thermogenesis in Young Men With and Without Obesity
Brychta RJ, Huang S, Wang J, Leitner BP, Hattenbach JD, Bell SL, Fletcher LA, Wood R, Idelson CR, Duckworth CJ, McGehee S, Courville AB, Bernstein SB, Reitman ML, Cypess AM, Chen KY. Quantification of the Capacity for Cold-Induced Thermogenesis in Young Men With and Without Obesity. The Journal Of Clinical Endocrinology & Metabolism 2019, 104: 4865-4878. PMID: 31150063, PMCID: PMC6733495, DOI: 10.1210/jc.2019-00728.Peer-Reviewed Original ResearchConceptsCold-induced thermogenesisLean menEnergy expenditureBrown fatBrown fat activitySkeletal muscle activityOvert shiveringInpatient protocolLean subjectsObesityTreatment opportunitiesMuscle activityFat activityBasal metabolic rateSkin temperature changesCold exposureNonshivering thermogenesisBasal heat productionYoung menMenThermogenesisFurther studiesRoom calorimeterFatMetabolic rate
2018
Regulation of Human Adipose Tissue Activation, Gallbladder Size, and Bile Acid Metabolism by a β3-Adrenergic Receptor Agonist
Baskin AS, Linderman JD, Brychta RJ, McGehee S, Anflick-Chames E, Cero C, Johnson JW, O'Mara AE, Fletcher LA, Leitner BP, Duckworth CJ, Huang S, Cai H, Garraffo HM, Millo CM, Dieckmann W, Tolstikov V, Chen EY, Gao F, Narain NR, Kiebish MA, Walter PJ, Herscovitch P, Chen KY, Cypess AM. Regulation of Human Adipose Tissue Activation, Gallbladder Size, and Bile Acid Metabolism by a β3-Adrenergic Receptor Agonist. Diabetes 2018, 67: db180462. PMID: 29980535, PMCID: PMC6152342, DOI: 10.2337/db18-0462.Peer-Reviewed Original ResearchMeSH KeywordsAcetanilidesAdipose Tissue, BrownAdolescentAdrenergic beta-AgonistsAdultAgedAged, 80 and overAnimalsBile Acids and SaltsGallbladderHealthy VolunteersHumansMiceMice, Inbred C57BLMiddle AgedReceptors, Adrenergic, betaReceptors, Adrenergic, beta-3RNA, MessengerThermogenesisThiazolesYoung AdultConceptsBile acid metabolismΒ3-adrenergic receptor agonistBrown adipose tissueReceptor agonistGallbladder sizeSelective β3-AR agonistΒ3-AR agonist mirabegronPositron emission tomography/White adipose tissue lipolysisUrinary bladder relaxationΒ3-AR mRNADose-proportional increaseDoses of placeboObesity-related complicationsBAT metabolic activityEmission tomography/Adipose tissue lipolysisHuman β3-ARAcid metabolismΒ3-AR agonistConjugated bile acidsGallbladder relaxationBladder relaxationOveractive bladderHealthy menExercise decreases defensive responses to unpredictable, but not predictable, threat
Lago TR, Hsiung A, Leitner BP, Duckworth CJ, Chen KY, Ernst M, Grillon C. Exercise decreases defensive responses to unpredictable, but not predictable, threat. Depression And Anxiety 2018, 35: 868-875. PMID: 29637654, PMCID: PMC6314494, DOI: 10.1002/da.22748.Peer-Reviewed Original ResearchMeSH KeywordsAdultAnticipation, PsychologicalAnxietyExerciseFearFemaleHumansMaleReflex, StartleYoung AdultConceptsSessions of exerciseInfluence of exercisePredictable threatSustained responseClinical indicationsHealthy controlsAnxiolytic effectsHealthy volunteersPhasic responseThreat testBehavioral interventionsAnxiety disordersControl activitiesDefensive responsesUnpredictable threatStartle potentiationExercisePotentiationNeurobehavioral mechanismsEyeblink startleResponseUnpredictable shocksProvide cluesDefensive stateThreat responses