2014
Dipeptidyl‐Peptidase 4 Inhibition and the Vascular Effects of Glucagon‐like Peptide‐1 and Brain Natriuretic Peptide in the Human Forearm
Devin JK, Pretorius M, Nian H, Yu C, Billings FT, Brown NJ. Dipeptidyl‐Peptidase 4 Inhibition and the Vascular Effects of Glucagon‐like Peptide‐1 and Brain Natriuretic Peptide in the Human Forearm. Journal Of The American Heart Association 2014, 3: e001075. PMID: 25158865, PMCID: PMC4310400, DOI: 10.1161/jaha.114.001075.Peer-Reviewed Original ResearchConceptsGlucagon-like peptide-1Brain natriuretic peptideForearm blood flowNatriuretic peptideDPP4 inhibitionBlood flowPeptide-1Placebo-controlled crossover studyDipeptidyl peptidase-4 inhibitorsDipeptidyl peptidase-4 inhibitionForearm vascular resistanceDose-dependent vasodilationMean arterial pressureGLP-1 concentrationsHuman forearmSitagliptin useDirect vasodilatorVascular resistanceVasodilator responseVascular effectsArterial pressureBrachial arteryDiabetes mellitusGlycemic controlNorepinephrine releaseSubstance P Increases Sympathetic Activity During Combined Angiotensin-Converting Enzyme and Dipeptidyl Peptidase-4 Inhibition
Devin JK, Pretorius M, Nian H, Yu C, Billings FT, Brown NJ. Substance P Increases Sympathetic Activity During Combined Angiotensin-Converting Enzyme and Dipeptidyl Peptidase-4 Inhibition. Hypertension 2014, 63: 951-957. PMID: 24516103, PMCID: PMC3984385, DOI: 10.1161/hypertensionaha.113.02767.Peer-Reviewed Original ResearchMeSH KeywordsAdultAngiotensin-Converting Enzyme InhibitorsBlood PressureBradykininCross-Over StudiesDipeptidyl Peptidase 4Double-Blind MethodEnalaprilatEnzyme InhibitorsFemaleHeart RateHumansMaleMiddle AgedNeurotransmitter AgentsNorepinephrinePeptidyl-Dipeptidase APyrazinesSitagliptin PhosphateSubstance PSympathetic Nervous SystemTriazolesVascular ResistanceConceptsDipeptidyl peptidase-4 inhibitionPeptidase-4 inhibitionTissue plasminogen activator releaseSubstance PDipeptidyl peptidase-4Plasminogen activator releaseSympathetic activityPeptidase-4Activator releasePlacebo-controlled crossover studyDipeptidyl peptidase-4 inhibitorsType 2 diabetes mellitusIntra-arterial enalaprilatForearm vascular resistanceForearm blood flowMean arterial pressurePeptidase-4 inhibitorsAngiotensin converting enzymeSubstrates of angiotensinVascular resistanceVasodilator responseArterial pressureBrachial arteryDiabetes mellitusCrossover study
2013
Fenofibrate lowers blood pressure in salt-sensitive but not salt-resistant hypertension
Gilbert K, Nian H, Yu C, Luther JM, Brown NJ. Fenofibrate lowers blood pressure in salt-sensitive but not salt-resistant hypertension. Journal Of Hypertension 2013, 31: 820-829. PMID: 23385647, PMCID: PMC3800119, DOI: 10.1097/hjh.0b013e32835e8227.Peer-Reviewed Original ResearchConceptsBlood pressureSalt dietHeart ratePeroxisome proliferator-activated receptor α (PPARα) agonistSalt-resistant hypertensionPlasma renin activityRenal vascular resistanceEffect of fenofibrateLow-salt dietMean arterial pressureHigh-salt dietDouble-blind protocolTreatment of hyperlipidemiaReceptor α agonistSalt sensitivityHypertensive volunteersRenal vasoconstrictionRenin activitySodium excretionVascular resistanceArterial pressureHypertensive individualsSalt intakeSystolic pressureTreatment arms
2011
CYP4A11 T8590C polymorphism, salt-sensitive hypertension, and renal blood flow
Williams JS, Hopkins PN, Jeunemaitre X, Brown NJ. CYP4A11 T8590C polymorphism, salt-sensitive hypertension, and renal blood flow. Journal Of Hypertension 2011, 29: 1913-1918. PMID: 21873888, PMCID: PMC3309034, DOI: 10.1097/hjh.0b013e32834aa786.Peer-Reviewed Original ResearchConceptsMean arterial pressureHigh salt intakeRenal blood flowHypertensive individualsBlood pressureSalt intakeC alleleSalt restrictionNormotensive individualsBlood flowSalt-sensitive blood pressureSalt sensitivityLow-salt dietDiagnosis of hypertensionHigh blood pressureSalt-sensitive hypertensionRenal vasodilationPressor responseSalt dietArterial pressureAngiotensin IIAttenuated increaseSodium homeostasisCYP4A11 T8590C polymorphismHypertensionRenin gene polymorphism: its relationship to hypertension, renin levels and vascular responses
Sun B, Williams JS, Pojoga L, Chamarthi B, Lasky-Su J, Raby BA, Hopkins PN, Jeunemaitre X, Brown NJ, Ferri C, Williams GH. Renin gene polymorphism: its relationship to hypertension, renin levels and vascular responses. Journal Of The Renin-Angiotensin-Aldosterone System 2011, 12: 564-571. PMID: 21490026, PMCID: PMC3444254, DOI: 10.1177/1470320311405873.Peer-Reviewed Original ResearchConceptsMean arterial pressurePlasma renin activityRenin activityRenin geneHypertension riskSingle nucleotide polymorphismsAngiotensin II infusionNormotensive Caucasian subjectsHyperPATH cohortII infusionPRA levelsVascular responsivenessRenin levelsArterial pressureEssential hypertensionVascular responsesAngiotensin IIHypertensionHigh riskIndependent cohortCaucasian subjectsA alleleResultant haplotypesUnderlying mechanismGene variation
2009
Endogenous Bradykinin Contributes to Increased Plasminogen Activator Inhibitor 1 Antigen following Hemodialysis
Marney AM, Ma J, Luther JM, Ikizler TA, Brown NJ. Endogenous Bradykinin Contributes to Increased Plasminogen Activator Inhibitor 1 Antigen following Hemodialysis. Journal Of The American Society Of Nephrology 2009, 20: 2246-2252. PMID: 19628666, PMCID: PMC2754101, DOI: 10.1681/asn.2009050505.Peer-Reviewed Original ResearchConceptsPlasminogen activator inhibitor-1 antigenHoe 140Endogenous bradykininHemodialysis patientsMCP-1Receptor blocker HOE-140Placebo-controlled crossover studyOxidative stressChronic hemodialysis patientsMean arterial pressureCoronary artery diseaseKallikrein-kinin systemBradykinin receptor antagonismHeart rate responsePAI-1 antigenTissue plasminogen activatorEffect of dialysisEnd of dialysisProduction of bradykininInhibits platelet aggregationCardiovascular eventsHemodialysis populationArterial pressureArtery diseaseEndothelial release
2007
Urinary Free Cortisol: An Intermediate Phenotype and a Potential Genetic Marker for a Salt-Resistant Subset of Essential Hypertension
Chamarthi B, Kolatkar NS, Hunt SC, Williams JS, Seely EW, Brown NJ, Murphey LJ, Jeunemaitre X, Williams GH. Urinary Free Cortisol: An Intermediate Phenotype and a Potential Genetic Marker for a Salt-Resistant Subset of Essential Hypertension. The Journal Of Clinical Endocrinology & Metabolism 2007, 92: 1340-1346. PMID: 17264181, DOI: 10.1210/jc.2006-2093.Peer-Reviewed Original ResearchConceptsUrinary free cortisolEssential hypertensionHigh urinary free cortisolLow-salt dietMean arterial pressureIntermediate phenotypesStrong familial componentArterial pressureDietary sodiumBlood pressureFree cortisolHypertensive siblingsHypertensionHypertensivesNormotensivesGeneral communityHypertensive familiesFamilial componentPreliminary reportFamilial aggregationSignificant predictorsPotential genetic markersSignificant differencesSignificant proportionCortisol
2006
β-2 Adrenergic Receptor Diplotype Defines a Subset of Salt-Sensitive Hypertension
Pojoga L, Kolatkar NS, Williams JS, Perlstein TS, Jeunemaitre X, Brown NJ, Hopkins PN, Raby BA, Williams GH. β-2 Adrenergic Receptor Diplotype Defines a Subset of Salt-Sensitive Hypertension. Hypertension 2006, 48: 892-900. PMID: 17015767, DOI: 10.1161/01.hyp.0000244688.45472.95.Peer-Reviewed Original ResearchConceptsBlood pressure responseSalt-sensitive hypertensionBeta-2 adrenergic receptorsAldosterone secretionDietary sodiumAdrenergic receptorsGreater blood pressure responseAdrenergic receptor variantsHigh plasma aldosteroneLow plasma reninLow-sodium balanceNormotensive white subjectsMean arterial pressureLow-renin hypertensionSerum potassium levelsAdrenergic receptor genotypePressure responseBlood pressure evaluationAdrenergic receptor stimulationAldosterone responseAldosterone systemHypertensive subjectsNormotensive subjectsPlasma aldosteronePlasma renin
2005
A pilot study indicating that bradykinin B2 receptor antagonism attenuates protamine‐related hypotension after cardiopulmonary bypass
Pretorius M, Scholl FG, McFarlane JA, Murphey LJ, Brown NJ. A pilot study indicating that bradykinin B2 receptor antagonism attenuates protamine‐related hypotension after cardiopulmonary bypass. Clinical Pharmacology & Therapeutics 2005, 78: 477-485. PMID: 16321614, DOI: 10.1016/j.clpt.2005.08.010.Peer-Reviewed Original ResearchConceptsMean arterial pressureSaline solution groupT-PA activityAdministration of protamineCardiopulmonary bypassProtamine administrationHoe 140Receptor antagonismBradykinin concentrationsSolution groupTissue-type plasminogen activator releaseACE inhibitor-treated patientsBradykinin B2 receptor antagonismReceptor antagonist HOE 140Angiotensin-converting enzyme inhibitorB2 receptor antagonismInhibitor-treated patientsElective cardiac surgeryAdult male patientsBradykinin receptor antagonismDegradation of bradykininPlasminogen activator releaseSaline solutionProtamine infusionArterial pressure
2004
Thyroid Function and Blood Pressure Homeostasis in Euthyroid Subjects
Gumieniak O, Perlstein TS, Hopkins PN, Brown NJ, Murphey LJ, Jeunemaitre X, Hollenberg NK, Williams GH. Thyroid Function and Blood Pressure Homeostasis in Euthyroid Subjects. The Journal Of Clinical Endocrinology & Metabolism 2004, 89: 3455-3461. PMID: 15240631, DOI: 10.1210/jc.2003-032143.Peer-Reviewed Original ResearchConceptsMean arterial pressureRenal vascular resistanceBlood pressure homeostasisBaseline mean arterial pressureEffective renal plasma flowRenal plasma flowPressure homeostasisThyroid functionVascular resistanceEuthyroid subjectsBlood pressure salt sensitivitySalt sensitivityBlood pressure responseSystemic vascular resistanceAminohippuric acid clearanceLow sodium dietBody mass indexBaseline characteristicsHypertensive subjectsNormotensive subjectsSubclinical hypothyroidismArterial pressureAcid clearanceMass indexEuthyroid individualsLoss of Sodium Modulation of Plasma Kinins in Human Hypertension
Murphey LJ, Eccles WK, Williams GH, Brown NJ. Loss of Sodium Modulation of Plasma Kinins in Human Hypertension. Journal Of Pharmacology And Experimental Therapeutics 2004, 308: 1046-1052. PMID: 14718610, DOI: 10.1124/jpet.103.059337.Peer-Reviewed Original ResearchConceptsKallikrein-kinin systemHigh salt intakeMean arterial pressureSalt intakeAldosterone systemHypertensive subjectsUrinary kallikreinRenal kallikrein-kinin systemTissue kallikrein-kinin systemPlasma renin activityLow-salt dietUrinary kallikrein excretionSodium-retaining statesBradykinin metabolitePlasma angiotensinRenin activitySalt restrictionSodium restrictionKallikrein excretionSalt dietSerum aldosteroneArterial pressureVascular responsesHuman hypertensionSodium modulation
2003
Acute angiotensin II increases plasma F2-isoprostanes in salt-replete human hypertensives
Murphey LJ, Morrow JD, Sawathiparnich P, Williams GH, Vaughan DE, Brown NJ. Acute angiotensin II increases plasma F2-isoprostanes in salt-replete human hypertensives. Free Radical Biology And Medicine 2003, 35: 711-718. PMID: 14583335, DOI: 10.1016/s0891-5849(03)00395-2.Peer-Reviewed Original ResearchConceptsF2-isoprostane concentrationsMean arterial pressurePlasma F2-isoprostane concentrationsAng II infusionAng IIII infusionOxidative stressF2-isoprostanesAcute Ang II infusionMin ANG IIPlasma renin activityHigh salt intakeLow salt intakeRenin-angiotensin systemLow sodium dietAngiotensin II increasesBody mass indexRenal plasma flowPlasma F2-isoprostanesHuman cardiovascular diseaseHuman hypertensivesHypertensive volunteersHypertensive groupHypertensive humansNormotensive groupEffect of Combined AT1 Receptor and Aldosterone Receptor Antagonism on Plasminogen Activator Inhibitor-1
Sawathiparnich P, Murphey LJ, Kumar S, Vaughan DE, Brown NJ. Effect of Combined AT1 Receptor and Aldosterone Receptor Antagonism on Plasminogen Activator Inhibitor-1. The Journal Of Clinical Endocrinology & Metabolism 2003, 88: 3867-3873. PMID: 12915681, DOI: 10.1210/jc.2003-030374.Peer-Reviewed Original ResearchMeSH KeywordsAdultAngiotensin Receptor AntagonistsBenzimidazolesBiphenyl CompoundsDiureticsElectrolytesFemaleFibrinolysisFurosemideHemodynamicsHumansMaleMineralocorticoid Receptor AntagonistsPlasminogen Activator Inhibitor 1Potassium ChlorideReceptor, Angiotensin, Type 1Renin-Angiotensin SystemSingle-Blind MethodSpironolactoneTetrazolesConceptsMean arterial pressureAldosterone receptor antagonismAng IIReceptor antagonismPAI-1Angiotensin II type 1Coadministration of spironolactoneEffects of candesartanFurosemide-induced increasePresence of candesartanAldosterone receptor antagonistsEndogenous Ang IIPlasminogen activator inhibitor-1PAI-1 antigenActivator inhibitor-1PAI-1 productionPlasminogen activator inhibitorAldosterone systemNormotensive subjectsArterial pressureAngiotensin IIAT1 receptorFibrinolytic variablesReceptor antagonistCandesartan
2000
Endogenous bradykinin and the renin and pressor responses to furosemide in humans.
Murphey LJ, Kumar S, Brown NJ. Endogenous bradykinin and the renin and pressor responses to furosemide in humans. Journal Of Pharmacology And Experimental Therapeutics 2000, 295: 644-8. PMID: 11046100.Peer-Reviewed Original ResearchConceptsPlasma renin activityMean arterial pressureHoe 140Renin responseEndogenous bradykininRenin activityArterial pressureHeart rateBasal plasma renin activityRenin-angiotensin systemAngiotensin I/Blood pressure regulationCrossover design studyAcute furosemide treatmentRenin regulationSpecific bradykininDiuretic responseFurosemide administrationFurosemide treatmentACE inhibitionReceptor antagonistPressure regulationBradykininFurosemideHumans
1999
Bradykinin Stimulates Tissue Plasminogen Activator Release in Human Vasculature
Brown N, Gainer J, Stein C, Vaughan D. Bradykinin Stimulates Tissue Plasminogen Activator Release in Human Vasculature. Hypertension 1999, 33: 1431-1435. PMID: 10373228, DOI: 10.1161/01.hyp.33.6.1431.Peer-Reviewed Original ResearchConceptsForearm blood flowPlasminogen activator inhibitor antigenTissue plasminogen activator releaseDose-dependent increasePlasminogen activator releaseTPA releaseInhibitor antigenBlood flowActivator releaseMean arterial pressureStrain-gauge plethysmographyHuman vasculatureInfused armNormotensive volunteersArterial pressureVasodilator nitroprussidePlasma levelsTPA antigenHeart rateSystemic effectsSodium nitroprussideAcetylcholineBradykininNitroprussideRandom order
1998
Gender Affects Renal Vasoconstrictor Response to Ang I and Ang II
Gandhi S, Gainer J, King D, Brown N. Gender Affects Renal Vasoconstrictor Response to Ang I and Ang II. Hypertension 1998, 31: 90-96. PMID: 9449397, DOI: 10.1161/01.hyp.31.1.90.Peer-Reviewed Original ResearchConceptsRenal vasoconstrictor responsesAng II levelsAng IAng IIVasoconstrictor responsesPressor responseII levelsHeart rateAng I infusionPlasma renin activityAng II infusionBaseline blood pressureMean arterial pressureAng II concentrationsRenal plasma flowII infusionRenin activitySodium excretionAngiotensin infusionNormotensive subjectsArterial pressureBlood pressureCrossover studyI infusionACE activity
1997
Selective Stimulation of Tissue-Type Plasminogen Activator (t-PA) In Vivo by Infusion of Bradykinin
Brown N, Nadeau J, Vaughan D. Selective Stimulation of Tissue-Type Plasminogen Activator (t-PA) In Vivo by Infusion of Bradykinin. Thrombosis And Haemostasis 1997, 77: 522-525. PMID: 9066005, DOI: 10.1055/s-0038-1656000.Peer-Reviewed Original ResearchMeSH KeywordsAnalysis of VarianceAngiotensin-Converting Enzyme InhibitorsAntihypertensive AgentsBlood PressureBradykininCaptoprilFemaleHumansHypertensionIsoquinolinesMalePlasminogen Activator Inhibitor 1QuinaprilRandomized Controlled Trials as TopicTetrahydroisoquinolinesTissue Plasminogen ActivatorConceptsT-PA antigen levelsTissue-type plasminogen activatorMean arterial pressureT-PA levelsAntigen levelsPAI-1 antigen levelsInfusion of bradykininSympathetic nervous systemEffect of bradykininTissue-type plasminogen activator secretionHypertensive patientsHemodynamic effectsArterial pressurePlasminogen activator secretionAngiotensin IIAnimal modelsPotent stimulusNervous systemPAI-1ACEIBradykininBradykinin resultsSelective stimulationPlasminogen activatorSignificant decrease
1996
Differential effects of angiotensin converting enzyme inhibitors on the vasodepressor and prostacyclin responses to bradykinin.
Brown NJ, Ryder D, Gainer JV, Morrow JD, Nadeau J. Differential effects of angiotensin converting enzyme inhibitors on the vasodepressor and prostacyclin responses to bradykinin. Journal Of Pharmacology And Experimental Therapeutics 1996, 279: 703-12. PMID: 8930174.Peer-Reviewed Original ResearchConceptsACE inhibitorsVasodepressor responseProstacyclin responsesEnzyme inhibitorsHigh-renin hypertensive patientsContribution of prostacyclinPlacebo-treated subjectsMean arterial pressureProstaglandin-independent mechanismEffect of bradykininDegradation of bradykininBradykinin doseProstacyclin metaboliteHypertensive patientsHypotensive responseVasodepressor effectArterial pressureBlood pressureACE inhibitionPGF1 alphaUrinary excretionProstacyclin productionProstaglandin productionBradykininClass effect