2020
Skeletal Muscle Mitochondrial Dysfunction Is Present in Patients with CKD before Initiation of Maintenance Hemodialysis
Gamboa JL, Roshanravan B, Towse T, Keller CA, Falck AM, Yu C, Frontera WR, Brown NJ, Ikizler TA. Skeletal Muscle Mitochondrial Dysfunction Is Present in Patients with CKD before Initiation of Maintenance Hemodialysis. Clinical Journal Of The American Society Of Nephrology 2020, 15: 926-936. PMID: 32591419, PMCID: PMC7341789, DOI: 10.2215/cjn.10320819.Peer-Reviewed Original ResearchMeSH KeywordsAdipose TissueAdultAgedDynaminsFemaleGlomerular Filtration RateHumansMagnetic Resonance ImagingMagnetic Resonance SpectroscopyMaleMiddle AgedMitochondriaMuscle StrengthPhosphocreatinePhysical Functional PerformanceQuadriceps MuscleRenal DialysisRenal Insufficiency, ChronicSeverity of Illness IndexWalk TestConceptsMaintenance hemodialysisMarkers of inflammationAdipose tissue infiltrationOxidative stressPhysical performanceMitochondrial dysfunctionTissue infiltrationMitochondrial functionSkeletal muscle mitochondrial dysfunctionCKD stage 3Poor physical performanceSeverity of CKDMuscle mitochondrial dysfunctionIntermuscular adipose tissueSkeletal muscle biopsiesMagnetic resonance imagingWalk testHigh morbidityPhysical functionPhosphocreatine recoveryMultifactorial etiologyMuscle biopsyCKDHemodialysisPatients
2016
Mitochondrial dysfunction and oxidative stress in patients with chronic kidney disease
Gamboa JL, Billings FT, Bojanowski MT, Gilliam LA, Yu C, Roshanravan B, Roberts LJ, Himmelfarb J, Ikizler TA, Brown NJ. Mitochondrial dysfunction and oxidative stress in patients with chronic kidney disease. Physiological Reports 2016, 4: e12780. PMID: 27162261, PMCID: PMC4873632, DOI: 10.14814/phy2.12780.Peer-Reviewed Original ResearchConceptsChronic kidney diseaseCKD stage 5Peripheral blood mononuclear cellsSeverity of CKDCKD stage 3Kidney diseaseOxidative stressF2-isoprostanesMtDNA copy numberMuscle biopsyMitochondrial volume densitySkeletal muscleDifferent CKD stagesMitochondrial dysfunctionBlood mononuclear cellsStage 3Stage 5Skeletal muscle biopsiesLower mtDNA copy numberMitochondrial DNA copy numberPlasma isofuransCKD stageMuscle dysfunctionMononuclear cellsFunction worsens
2015
Oxidative Stress Biomarkers and Incidence of Postoperative Atrial Fibrillation in the Omega‐3 Fatty Acids for Prevention of Postoperative Atrial Fibrillation (OPERA) Trial
Wu JH, Marchioli R, Silletta MG, Masson S, Sellke FW, Libby P, Milne GL, Brown NJ, Lombardi F, Damiano RJ, Marsala J, Rinaldi M, Domenech A, Simon C, Tavazzi L, Mozaffarian D. Oxidative Stress Biomarkers and Incidence of Postoperative Atrial Fibrillation in the Omega‐3 Fatty Acids for Prevention of Postoperative Atrial Fibrillation (OPERA) Trial. Journal Of The American Heart Association 2015, 4: e001886. PMID: 25994442, PMCID: PMC4599415, DOI: 10.1161/jaha.115.001886.Peer-Reviewed Original ResearchConceptsEnd of surgeryOxidative stress biomarkersPostoperative atrial fibrillationPostoperative day 2Stress biomarkersAtrial fibrillationOxidative stressDay 2Omega-3 fatty acidsCardiac surgery patientsAtrial Fibrillation (ARISTOTLE) trialKey pathogenic rolePostoperative day 10Urine F2-isoprostanesAssociation of biomarkersBaseline biomarker levelsElevated oxidative stressAnimal study resultsPerioperative courseHospital dischargeSurgery patientsMedication useSurgery typeUrine levelsBiomarker levels
2012
Obesity and Oxidative Stress Predict AKI after Cardiac Surgery
Billings FT, Pretorius M, Schildcrout JS, Mercaldo ND, Byrne JG, Ikizler TA, Brown NJ. Obesity and Oxidative Stress Predict AKI after Cardiac Surgery. Journal Of The American Society Of Nephrology 2012, 23: 1221-1228. PMID: 22626819, PMCID: PMC3380645, DOI: 10.1681/asn.2011090940.Peer-Reviewed Original ResearchMeSH KeywordsAcute Kidney InjuryAgedAngiotensin-Converting Enzyme InhibitorsBiomarkersBody Mass IndexCardiac Surgical ProceduresDiureticsF2-IsoprostanesFemaleHumansInterleukin-6MaleMiddle AgedObesityOxidative StressPlasminogen Activator Inhibitor 1Postoperative ComplicationsRamiprilRandomized Controlled Trials as TopicRisk FactorsSignal TransductionSpironolactone
2011
Comparative Effects of Angiotensin-Converting Enzyme Inhibition and Angiotensin-Receptor Blockade on Inflammation during Hemodialysis
Gamboa JL, Pretorius M, Todd-Tzanetos DR, Luther JM, Yu C, Ikizler TA, Brown NJ. Comparative Effects of Angiotensin-Converting Enzyme Inhibition and Angiotensin-Receptor Blockade on Inflammation during Hemodialysis. Journal Of The American Society Of Nephrology 2011, 23: 334-342. PMID: 22158433, PMCID: PMC3269170, DOI: 10.1681/asn.2011030287.Peer-Reviewed Original ResearchMeSH KeywordsAngiotensin Receptor AntagonistsAngiotensin-Converting Enzyme InhibitorsBlood CoagulationCD40 LigandCross-Over StudiesCytokinesDouble-Blind MethodFemaleHemodynamicsHumansInflammationKidney Failure, ChronicMaleMiddle AgedOxidative StressRamiprilRenal DialysisReninTetrazolesValineValsartanConceptsAngiotensin receptor blockersMaintenance hemodialysis patientsCardiovascular mortalityHemodialysis patientsACE inhibitorsGreater anti-inflammatory effectAngiotensin-Converting Enzyme InhibitionOxidative stressAngiotensin receptor blockadeIL-10 concentrationsD-dimer levelsIL-6 levelsProspective clinical trialsAnti-inflammatory effectsIL-1β concentrationsLevels of vWFSerial blood samplingCardiovascular eventsEndothelial dysfunctionCrossover studyWashout periodIsoprostane levelsClinical trialsDrug treatmentVWF levelsThe renin–angiotensin–aldosterone system and glucose homeostasis
Luther JM, Brown NJ. The renin–angiotensin–aldosterone system and glucose homeostasis. Trends In Pharmacological Sciences 2011, 32: 734-739. PMID: 21880378, PMCID: PMC3223326, DOI: 10.1016/j.tips.2011.07.006.Peer-Reviewed Original ResearchConceptsAldosterone systemΒ-cellsGlucose-stimulated insulin secretionIncidence of diabetesLarge clinical trialsInduces Insulin ResistanceCultured β-cellsPancreatic β-cellsRAAS inhibitionAng IIAngiotensin IIInsulin resistanceHeart diseaseClinical trialsDiabetes progressionMineralocorticoid receptorPharmacological strategiesInsulin secretionGlucose homeostasisPancreatic isletsOxidative stressDiabetesIndependent mechanismsGlucose transportCellular level
2010
Increased blood flow induces oxidative stress through an endothelium- and nitric oxide-independent mechanism
Fong P, Stafforini DM, Brown NJ, Pretorius M. Increased blood flow induces oxidative stress through an endothelium- and nitric oxide-independent mechanism. Free Radical Biology And Medicine 2010, 49: 301-305. PMID: 20423727, PMCID: PMC2916026, DOI: 10.1016/j.freeradbiomed.2010.04.023.Peer-Reviewed Original ResearchConceptsForearm blood flowHypertensive subjectsL-NMMAIsoprostane releaseBlood flowOxidative stressBasal forearm blood flowNitric oxide-independent mechanismEndothelium-independent mechanismNO synthase inhibitorEffect of bradykininMonomethyl-L-arginineIntraarterial bradykininPotent vasodilatorSynthase inhibitionSynthase inhibitorBradykininNitric oxideDependent mechanismReactive oxygen speciesHuman vasculatureSignificant increaseNitroprussideSubjectsOxygen species
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
2008
Simultaneous determination of uric acid metabolites allantoin, 6-aminouracil, and triuret in human urine using liquid chromatography–mass spectrometry
Kim KM, Henderson GN, Frye RF, Galloway CD, Brown NJ, Segal MS, Imaram W, Angerhofer A, Johnson RJ. Simultaneous determination of uric acid metabolites allantoin, 6-aminouracil, and triuret in human urine using liquid chromatography–mass spectrometry. Journal Of Chromatography B 2008, 877: 65-70. PMID: 19081307, PMCID: PMC2684329, DOI: 10.1016/j.jchromb.2008.11.029.Peer-Reviewed Original ResearchConceptsUric acidUrinary metabolitesOxidative stressSelected-reaction monitoringUrinary creatinineNormal individualsNitric oxideUrine samplesLiquid chromatography-mass spectrometryBiological samplesPositive ion modeTandem mass spectrometry methodHigh-performance liquid chromatographyMass spectrometry methodChromatography-mass spectrometryUrineInter-day precisionMetabolitesUrinary allantoinIon modeLC-MS/MS analysisHuman urineGradient HPLCMost mammalsSpectrometry method
2006
Angiotensin II Induces Interleukin-6 in Humans Through a Mineralocorticoid Receptor–Dependent Mechanism
Luther JM, Gainer JV, Murphey LJ, Yu C, Vaughan DE, Morrow JD, Brown NJ. Angiotensin II Induces Interleukin-6 in Humans Through a Mineralocorticoid Receptor–Dependent Mechanism. Hypertension 2006, 48: 1050-1057. PMID: 17043157, DOI: 10.1161/01.hyp.0000248135.97380.76.Peer-Reviewed Original ResearchConceptsMineralocorticoid receptor-dependent mechanismAngiotensin IIReceptor-dependent mechanismBlood pressureIL-6Normotensive subjectsCrossover studyHigh-sensitivity C-reactive proteinSerum IL-6 concentrationDouble-blind crossover studyOxidative stressWeeks of placeboIL-6 concentrationsC-reactive proteinRenal plasma flowIntravenous aldosteroneAldosterone responseSerum potassiumInterleukin-6Mineralocorticoid receptorPlaceboAldosteroneSpironolactoneSeparate daysReceptor independent
2005
Aldosterone and end-organ damage
Brown N. Aldosterone and end-organ damage. Current Opinion In Internal Medicine 2005, 4: 381-387. DOI: 10.1097/00132980-200508000-00009.Peer-Reviewed Original ResearchMineralocorticoid receptor antagonismCongestive heart failureHeart failureReceptor antagonismMineralocorticoid receptorOxidative stressMineralocorticoid receptor-dependent mechanismEndothelial nitric oxide synthaseContribution of aldosteroneEnd-organ damageReceptor-independent effectsMineralocorticoid receptor agonistRecent clinical studiesInduction of inflammationNitric oxide synthaseRapid nongenomic mechanismsReceptor-dependent mechanismPurpose of reviewExtracellular matrix turnoverMineralocorticoid antagonismInflammatory markersCardiovascular mortalityEndothelial dysfunctionRenal injuryEndothelial functionAldosterone and end-organ damage
Brown NJ. Aldosterone and end-organ damage. Current Opinion In Nephrology & Hypertension 2005, 14: 235-241. PMID: 15821416, DOI: 10.1097/01.mnh.0000165889.60254.98.Peer-Reviewed Original ResearchConceptsMineralocorticoid receptor antagonismCongestive heart failureHeart failureReceptor antagonismMineralocorticoid receptorOxidative stressMineralocorticoid receptor-dependent mechanismEndothelial nitric oxide synthaseContribution of aldosteroneEnd-organ damageReceptor-independent effectsMineralocorticoid receptor agonistRecent clinical studiesInduction of inflammationNitric oxide synthaseRapid nongenomic mechanismsReceptor-dependent mechanismExtracellular matrix turnoverMineralocorticoid antagonismInflammatory markersCardiovascular mortalityEndothelial dysfunctionRenal injuryEndothelial functionRenal disease
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 group