2023
Testosterone-associated blood pressure dysregulation in women with androgen excess polycystic ovary syndrome
Stone T, Yanes Cardozo L, Oluwatade T, Leone C, Burgos M, Okifo F, Pal L, Reckelhoff J, Stachenfeld N. Testosterone-associated blood pressure dysregulation in women with androgen excess polycystic ovary syndrome. AJP Heart And Circulatory Physiology 2023, 325: h232-h243. PMID: 37327000, PMCID: PMC10393337, DOI: 10.1152/ajpheart.00164.2023.Peer-Reviewed Original ResearchConceptsSympathetic nervous system activityBlood pressure dysregulationPolycystic ovary syndromeBody mass indexBaroreflex gainOvary syndromeBlood pressureObese insulin-resistant womenPolycystic ovary syndrome phenotypesRenin-angiotensin system activationSerum angiotensin-converting enzymeGonadotropin-releasing hormone antagonistLower sympathetic nervous system activityLower body negative pressureHeightened cardiovascular riskInsulin-resistant womenSystolic blood pressureBody negative pressureNervous system activityAngiotensin-converting enzymeIR womenCardiovascular riskSerum aldosteroneBaroreflex controlDiastolic BPTestosterone effects on autonomic function in women with androgen excess polycystic ovary syndrome
Stone T, Cardozo L, Oluwatade T, Leone C, Okifo F, Reckelhoff J, Pal L, Stachenfeld N. Testosterone effects on autonomic function in women with androgen excess polycystic ovary syndrome. Physiology 2023, 38: 5729543. DOI: 10.1152/physiol.2023.38.s1.5729543.Peer-Reviewed Original ResearchLower body negative pressureBlood pressureHormone interventionSympathetic baroreflexAutonomic functionSimilar systolic blood pressureGonadotropin-releasing hormone antagonistInsulin-resistant womenDiastolic blood pressurePolycystic ovary syndromeSystolic blood pressureCardiovascular autonomic controlBody negative pressureMSNA activitySerum angiotensinOvarian syndromeOvary syndromeResistant womenBaroreflex sensitivityHormone suppressionSerum aldosteroneAutonomic perturbationsT elevationHormone antagonistElevated androgens
2013
Testosterone modulates sodium‐regulating hormones in women with PCOS
Stachenfeld N, Wenner M, Taylor H. Testosterone modulates sodium‐regulating hormones in women with PCOS. The FASEB Journal 2013, 27: 904.5-904.5. DOI: 10.1096/fasebj.27.1_supplement.904.5.Peer-Reviewed Original ResearchPolycystic ovary syndromePlasma renin activityHormone conditionsRenal sodium handlingAldosterone systemRenin activityOvary syndromeSerum aldosteroneSodium handlingHormone antagonistSex hormonesAldosteroneDay 8Day 4Sodium regulationGnRHantWomenTestosteroneHormoneHyperandrogenismGonadotropinSyndromeAntagonistKidney
2005
Progesterone increases plasma volume independent of estradiol
Stachenfeld NS, Taylor HS. Progesterone increases plasma volume independent of estradiol. Journal Of Applied Physiology 2005, 98: 1991-1997. PMID: 15718411, DOI: 10.1152/japplphysiol.00031.2005.Peer-Reviewed Original ResearchConceptsTranscapillary escape ratePlasma concentrationsPlasma volumeGnRH antagonistECF volumeAdequate plasma volumeAldosterone system stimulationPlasma renin activityGonadotropin-releasing hormoneExtracellular fluid volumeRenin activitySerum aldosteroneAng IIBlood pressureEstrogen administrationSystem stimulationDay 2Day 5Pg/Day 13Fluid regulationPV expansionFluid volumeIndependent effectsProgesterone
1996
Fluid balance and renal response following dehydrating exercise in well-trained men and women
Stachenfeld N, Gleim G, Zabetakis P, Nicholas J. Fluid balance and renal response following dehydrating exercise in well-trained men and women. European Journal Of Applied Physiology 1996, 72: 468-477. PMID: 8925818, DOI: 10.1007/bf00242277.Peer-Reviewed Original ResearchConceptsPlasma renin activityEnd of exerciseSodium handlingMin postexerciseEarly recoveryFluid balanceLow plasma renin activityRenal free water clearancePlasma volumeFractional sodium excretionPlasma osmolalityFree water clearanceOverall fluid balanceMin of recoveryFluid-regulating hormonesRenin activitySodium excretionSerum aldosteroneNorepinephrine concentrationsRenal responseWater clearanceRenal waterAnaerobic thresholdWater reabsorptionWomen