2006
Effects of hypoglycemia on human brain activation measured with fMRI
Anderson AW, Heptulla RA, Driesen N, Flanagan D, Goldberg PA, Jones TW, Rife F, Sarofin H, Tamborlane W, Sherwin R, Gore JC. Effects of hypoglycemia on human brain activation measured with fMRI. Magnetic Resonance Imaging 2006, 24: 693-697. PMID: 16824963, DOI: 10.1016/j.mri.2006.03.013.Peer-Reviewed Original ResearchConceptsFunctional magnetic resonance imagingBrain activationHuman brain activationPassive sensory stimulationCognitive tasksFMRI activityVisual stimuliEuglycemic clamp studiesBlood glucose levelsLevel-dependent contrastEffects of hypoglycemiaBOLD signalSensory stimulationHealthy human subjectsVisual stimulationMagnetic resonance imagingHyperinsulinemic hypoglycemicHealthy brainAcute hypoglycemiaGlucose levelsClamp studiesResonance imagingFractional signal changeHypoglycemiaEuglycemiaThe Effects of Aerobic Exercise on Glucose and Counterregulatory Hormone Concentrations in Children With Type 1 Diabetes
Tansey MJ, Tsalikian E, Beck RW, Mauras N, Buckingham BA, Weinzimer SA, Janz KF, Kollman C, Xing D, Ruedy KJ, Steffes MW, Borland TM, Singh RJ, Tamborlane WV. The Effects of Aerobic Exercise on Glucose and Counterregulatory Hormone Concentrations in Children With Type 1 Diabetes. Diabetes Care 2006, 29: 20-25. PMID: 16373890, PMCID: PMC2396943, DOI: 10.2337/diacare.29.01.06.dc05-1192.Peer-Reviewed Original ResearchConceptsType 1 diabetesOral glucoseNorepinephrine concentrationsAerobic exerciseExercise sessionsGrowth hormoneAcute glucose-lowering effectGlucose concentrationAerobic exercise resultsLow glucoseIncidence of hypoglycemiaExercise-induced increaseGlucose-lowering effectCounterregulatory hormone concentrationsTarget heart rateTreatment of hypoglycemiaPlasma glucose concentrationDl risePlasma glucagonPlasma glucoseBlood glucoseVs. 6Baseline glucoseBaseline valuesHeart rate
2003
Defective Activation of Skeletal Muscle and Adipose Tissue Lipolysis in Type 1 Diabetes Mellitus during Hypoglycemia
Enoksson S, Caprio SK, Rife F, Shulman GI, Tamborlane WV, Sherwin RS. Defective Activation of Skeletal Muscle and Adipose Tissue Lipolysis in Type 1 Diabetes Mellitus during Hypoglycemia. The Journal Of Clinical Endocrinology & Metabolism 2003, 88: 1503-1511. PMID: 12679430, DOI: 10.1210/jc.2002-021013.Peer-Reviewed Original ResearchMeSH KeywordsAdipose TissueAdrenergic beta-AgonistsAdultBlood GlucoseDiabetes Mellitus, Type 1EpinephrineFatty Acids, NonesterifiedFemaleGlucoseGlucose Clamp TechniqueGlycerolHomeostasisHumansHypoglycemiaInsulinLactic AcidLipolysisMaleMuscle, SkeletalNorepinephrineReceptors, Adrenergic, beta-2TerbutalineConceptsT1DM patientsControl subjectsGlucose disposalAdipose tissueType 1 diabetes mellitus patientsWhole-body glucose disposalWhole-body glucose useSkeletal muscleDiabetes mellitus patientsGlucagon secretory responsesRisk of hypoglycemiaPlasma epinephrine concentrationSeverity of hypoglycemiaAdipose tissue lipolysisMajor target tissuesHyperinsulinemic euglycemiaAgonist terbutalineAdrenomedullary responseMellitus patientsNondiabetic subjectsDeficient releasePlasma epinephrinePlasma glucoseInsulin infusionCatecholamine secretionLocal Lactate Perfusion of the Ventromedial Hypothalamus Suppresses Hypoglycemic Counterregulation
Borg MA, Tamborlane WV, Shulman GI, Sherwin RS. Local Lactate Perfusion of the Ventromedial Hypothalamus Suppresses Hypoglycemic Counterregulation. Diabetes 2003, 52: 663-666. PMID: 12606506, DOI: 10.2337/diabetes.52.3.663.Peer-Reviewed Original ResearchConceptsCounterregulatory hormone responsesVentromedial hypothalamusHormone responseSprague-Dawley ratsGlucose-sensing mechanismHypoglycemic counterregulationSystemic hypoglycemiaHormonal suppressionLactate perfusionApproximate fourfold increaseGlucose metabolismMicrodialysis perfusionGlucose perfusionHormonal responsesHypoglycemic plateauHypoglycemiaPerfusionL-lactateExogenous glucoseFourfold increaseGlucoseLactate
1999
Chronic hypoglycemia and diabetes impair counterregulation induced by localized 2-deoxy-glucose perfusion of the ventromedial hypothalamus in rats.
Borg MA, Borg WP, Tamborlane WV, Brines ML, Shulman GI, Sherwin RS. Chronic hypoglycemia and diabetes impair counterregulation induced by localized 2-deoxy-glucose perfusion of the ventromedial hypothalamus in rats. Diabetes 1999, 48: 584-587. PMID: 10078560, DOI: 10.2337/diabetes.48.3.584.Peer-Reviewed Original ResearchConceptsVentromedial hypothalamusSystemic hypoglycemiaChronic hypoglycemiaCellular glucopeniaDefective counterregulationDiabetic BBNondiabetic BBDiabetic groupEpinephrine responseNorepinephrine responseCatecholamine responsesIatrogenic hypoglycemiaDiabetic ratsGlucagon releaseEfferent pathwaysSympathoadrenal systemControl ratsHypoglycemic ratsHypoglycemiaGlucopeniaCounterregulationRatsHypothalamusPerfusionCritical role
1997
Local ventromedial hypothalamus glucose perfusion blocks counterregulation during systemic hypoglycemia in awake rats.
Borg MA, Sherwin RS, Borg WP, Tamborlane WV, Shulman GI. Local ventromedial hypothalamus glucose perfusion blocks counterregulation during systemic hypoglycemia in awake rats. Journal Of Clinical Investigation 1997, 99: 361-365. PMID: 9006005, PMCID: PMC507804, DOI: 10.1172/jci119165.Peer-Reviewed Original ResearchConceptsVentromedial hypothalamic nucleusMM D-glucoseControl groupGlucose perfusionHypoglycemic counterregulationSystemic hypoglycemiaNorepinephrine releaseGlucagon secretionCatecholamine concentrationsHypothalamic nucleiAwake ratsHormonal secretionControl animalsHypoglycemiaHormonal responsesPerfusionL glucoseCounterregulationD-glucoseGlucagonRatsSecretionGlucoseAnimalsGlucopenia
1994
Metabolic Effects of rhIGF-1 in Normal Human Subjects
Rennert NJ, Boulware SD, Kerr D, Caprio S, Tamborlane WV, Sherwin RS. Metabolic Effects of rhIGF-1 in Normal Human Subjects. Advances In Experimental Medicine And Biology 1994, 343: 311-318. PMID: 8184741, DOI: 10.1007/978-1-4615-2988-0_30.Peer-Reviewed Original ResearchConceptsRhIGF-1Hepatic glucose productionIGF-1Free fatty acidsGlucose productionGlucose uptakeEuglycemic clamp techniqueHuman IGF-1Normal human subjectsSpite of maintenanceSustained euglycemiaMetabolic effectsFFA levelsHypoglycemic effectClamp techniqueMetabolic actionsProfound reductionInsulinHypoglycemic hormoneFat cellsRatsComparable stimulationProtein breakdownSimilar extentEuglycemia
1993
Effect of insulin-like growth factor-1 on the responses to and recognition of hypoglycemia in humans. A comparison with insulin.
Kerr D, Tamborlane WV, Rife F, Sherwin RS. Effect of insulin-like growth factor-1 on the responses to and recognition of hypoglycemia in humans. A comparison with insulin. Journal Of Clinical Investigation 1993, 91: 141-147. PMID: 8423214, PMCID: PMC330007, DOI: 10.1172/jci116163.Peer-Reviewed Original ResearchConceptsRecombinant human insulin-like growth factor-1Insulin-like growth factor-1Growth factor-1Glucagon responseGlucose productionAbsent glucagon responsesPlasma glucose nadirsGrowth hormone responseInsulin-induced hypoglycemiaAwareness of hypoglycemiaGrowth hormone releaseFactor 1Hepatic glucose productionHuman insulin-like growth factor-1Recognition of hypoglycemiaSymptomatic awarenessNorepinephrine levelsCounterregulatory responsesHypoglycemic stimulusSympathetic activityGlucose nadirsGlucagon releaseBlood glucoseRebound increaseHormone release
1985
Intensive insulin therapy reduces counterregulatory hormone responses to hypoglycemia in patients with type I diabetes.
Simonson DC, Tamborlane WV, DeFronzo RA, Sherwin RS. Intensive insulin therapy reduces counterregulatory hormone responses to hypoglycemia in patients with type I diabetes. Annals Of Internal Medicine 1985, 103: 184-90. PMID: 3893253, DOI: 10.7326/0003-4819-103-2-184.Peer-Reviewed Original ResearchConceptsCounterregulatory hormone responsesPump treatmentHormone responseCounterregulatory hormone releaseInsulin pump treatmentPerception of hypoglycemiaIntensive insulin therapyIntensive insulin treatmentInsulin clamp techniqueType IBlood glucose levelsCounterregulatory hormonesGlucose counterregulationInsulin therapyHypoglycemic stimulusHypoglycemic episodesGlucagon releaseHealthy controlsInsulin treatmentHormone releaseStudy groupGlucose levelsHypoglycemic periodNormal controlsHypoglycemia