2019
OR13-3 Effects of Iron Isomaltoside versus Ferric Carboxymaltose on Hormonal Control of Phosphate Homeostasis: The PHOSPHARE-IDA04/05 Randomized Controlled Trials
Wolf M, Rubin J, Achebe M, Econs M, Peacock M, Imel E, Thomsen L, Carpenter T, Weber T, Zoller H. OR13-3 Effects of Iron Isomaltoside versus Ferric Carboxymaltose on Hormonal Control of Phosphate Homeostasis: The PHOSPHARE-IDA04/05 Randomized Controlled Trials. Journal Of The Endocrine Society 2019, 3: or13-3. PMCID: PMC6554827, DOI: 10.1210/js.2019-or13-3.Peer-Reviewed Original ResearchIron deficiency anemiaPg/mLFerric carboxymaltoseIron isomaltosideVitamin DIntact FGF23Day 1Day 35Bone turnoverPhosphate excretionIIM groupCorrection of IDADay 8Urinary fractional phosphate excretionBone-specific alkaline phosphataseFractional phosphate excretionNew intravenous iron preparationsIncidence of hypophosphatemiaSevere hypersensitivity reactionsGrowth factor 23Intravenous iron preparationsRenal phosphate excretionRandomized Controlled TrialsRenal phosphate wastingSpecific alkaline phosphatase
2018
Chapter 83 The Hypocalcemic Disorders
Gafni R, Insogna K, Carpenter T. Chapter 83 The Hypocalcemic Disorders. 2018, 527-547. DOI: 10.1016/b978-0-12-809963-6.00083-3.ChaptersHypocalcemic disordersParathyroid hormoneVitamin DHypocalcemic conditionsLong-term managementPTH secretionChronic hypocalcemiaNarrow normal rangeCalciotropic hormonesFunctional etiologyClinical manifestationsVitamin D.PTH actionHomeostatic disturbancesNormal rangePhysiologic consequencesClinical scenariosHypocalcemiaMetabolic activationDisordersMolecular actionsEtiologyHormoneFunctional mechanismsTherapy
2017
Rickets
Carpenter TO, Shaw NJ, Portale AA, Ward LM, Abrams SA, Pettifor JM. Rickets. Nature Reviews Disease Primers 2017, 3: 17101. PMID: 29265106, DOI: 10.1038/nrdp.2017.101.Peer-Reviewed Original ResearchConceptsVitamin D metabolismNutritional ricketsD metabolismVitamin DFibroblast growth factor 23 productionAbnormal serum calciumActivated vitamin DOral phosphate supplementationVitamin D supplementationRenal phosphate handlingVitamin D metabolitesAge of onsetDarker skin typesD supplementationFGF23 antibodyClinical presentationSerum calciumPhysical examinationD metabolitesMedical historyPhosphate handlingBone diseasePhosphopenic ricketsPhosphate supplementationConventional treatmentCYP24A1 loss of function: Clinical phenotype of monoallelic and biallelic mutations
Carpenter TO. CYP24A1 loss of function: Clinical phenotype of monoallelic and biallelic mutations. The Journal Of Steroid Biochemistry And Molecular Biology 2017, 173: 337-340. PMID: 28093352, DOI: 10.1016/j.jsbmb.2017.01.006.Peer-Reviewed Original ResearchConceptsVitamin D metabolismD metabolismParathyroid hormoneActive vitamin D metaboliteVitamin D supplementationDietary calcium intakeIdiopathic infantile hypercalcemiaLikely disease-causing variantsVitamin D metabolitesVitamin D pathwayCalcium homeostatic systemCompound heterozygote mutationsFunction mutationsD supplementationSymptomatic hypercalcemiaCalcium intakeUnrecognized causeVitamin DCalcium metabolismD metabolitesInfantile hypercalcemiaDisease-causing variantsVariant mutationsLoss of functionActive metabolite
2014
Mutations in SLC34A3/NPT2c Are Associated with Kidney Stones and Nephrocalcinosis
Dasgupta D, Wee MJ, Reyes M, Li Y, Simm PJ, Sharma A, Schlingmann KP, Janner M, Biggin A, Lazier J, Gessner M, Chrysis D, Tuchman S, Baluarte HJ, Levine MA, Tiosano D, Insogna K, Hanley DA, Carpenter TO, Ichikawa S, Hoppe B, Konrad M, Sävendahl L, Munns CF, Lee H, Jüppner H, Bergwitz C. Mutations in SLC34A3/NPT2c Are Associated with Kidney Stones and Nephrocalcinosis. Journal Of The American Society Of Nephrology 2014, 25: 2366-2375. PMID: 24700880, PMCID: PMC4178443, DOI: 10.1681/asn.2013101085.Peer-Reviewed Original ResearchConceptsIdiopathic hypercalciuriaDecreased tubular reabsorption of phosphateIncreased risk of kidney stone formationSerum 1,25(OH)2 vitamin DTubular reabsorption of phosphateAssociated with kidney stonesVitamin D levelsSolute carrier family 34Renal phosphate wastingDecreased serum phosphateHereditary hypophosphatemic ricketsHealthy family membersReabsorption of phosphateRisk of kidney stone formationRickets/osteomalaciaDecreased tubular reabsorptionKidney stone formationSLC34A3 mutationsIndependent of genotypeMedullary nephrocalcinosisSerum phosphateVitamin DDependent phosphate cotransporterTubular reabsorptionD levels
2012
Hypercalcemia in Children Receiving Pharmacologic Doses of Vitamin D
Vanstone MB, Oberfield SE, Shader L, Ardeshirpour L, Carpenter TO. Hypercalcemia in Children Receiving Pharmacologic Doses of Vitamin D. Pediatrics 2012, 129: e1060-e1063. PMID: 22412034, PMCID: PMC8194455, DOI: 10.1542/peds.2011-1663.Peer-Reviewed Original ResearchConceptsVitamin DSerum calciumPeak serum calciumResolution of hypercalcemiaWide dosing rangeElevated serum calciumVitamin D deficiencyAge-specific guidelinesAge 2 weeksAdministration of dosagesDaily dietary intakeD deficiencyDeficient ricketsPharmacologic dosesTreatment regimensD levelsHypervitaminosis DDietary intakeDosage recommendationsDose selectionDosing rangeGeneral populationPharmacologic dosingHypercalcemiaSmall childrenEffects of ethnicity and vitamin D supplementation on vitamin D status and changes in bone mineral content in infants
Abrams SA, Hawthorne KM, Rogers SP, Hicks PD, Carpenter TO. Effects of ethnicity and vitamin D supplementation on vitamin D status and changes in bone mineral content in infants. BMC Pediatrics 2012, 12: 6. PMID: 22248486, PMCID: PMC3271033, DOI: 10.1186/1471-2431-12-6.Peer-Reviewed Original ResearchConceptsBone mineral contentBone mineral densityVitamin D supplementationD supplementationVitamin DHispanic infantsDaily vitamin D intakeCaucasian infantsIU/dayVitamin D intakeVitamin D3 supplementationVitamin D statusMonths of lifeNon-Hispanic CaucasiansD intakeD statusD3 supplementationSupplementation interventionsBone healthCord serumMineral densityInfantsFirst monthFirst weekBone mineralization
2011
Demographic, dietary, and biochemical determinants of vitamin D status in inner-city children
Carpenter TO, Herreros F, Zhang JH, Ellis BK, Simpson C, Torrealba-Fox E, Kim GJ, Savoye M, Held NA, Cole D. Demographic, dietary, and biochemical determinants of vitamin D status in inner-city children. American Journal Of Clinical Nutrition 2011, 95: 137-146. PMID: 22170368, PMCID: PMC3238457, DOI: 10.3945/ajcn.111.018721.Peer-Reviewed Original ResearchConceptsParathyroid hormonePmol/LMinority infantsFormula useMeasurement of PTHSkin typeOlder childrenVitamin D insufficientVitamin D intakeVitamin D statusVitamin D fortificationAlkaline phosphatase activityDietary intake dataInner-city childrenClinical ricketsD intakeD statusSerum calciumDihydroxyvitamin DVitamin DD fortificationBlood samplesIntake dataReference rangeTotal alkaline phosphatase activityChapter 59 The Hypocalcemic Disorders Differential Diagnosis and Therapeutic Use of Vitamin D
Carpenter T, Insogna K. Chapter 59 The Hypocalcemic Disorders Differential Diagnosis and Therapeutic Use of Vitamin D. 2011, 1091-1106. DOI: 10.1016/b978-0-12-381978-9.10059-9.ChaptersTotal serum calcium concentrationCalcium concentrationSerum calcium concentrationTotal serum calciumDL declineSecondary hyperparathyroidismSerum calciumSkeletal consequencesVitamin DCalcium measuresClinical guidelinesDifferential diagnosisMineralization defectNormal individualsTherapeutic useHypocalcemiaSerum albuminExtracellular fluidCalcium deficiencyDlCalciumAlbuminHyperparathyroidismHypokalemiaHypoparathyroidism
2010
NIH consensus development conference statement: Lactose intolerance and health.
Suchy FJ, Brannon PM, Carpenter TO, Fernandez JR, Gilsanz V, Gould JB, Hall K, Hui SL, Lupton J, Mennella J, Miller NJ, Osganian SK, Sellmeyer DE, Wolf MA. NIH consensus development conference statement: Lactose intolerance and health. NIH Consensus And State-of-the-Science Statements 2010, 27: 1-27. PMID: 20186234.Peer-Reviewed Original ResearchConceptsLactose intoleranceEvidence-based dietary approachesClinical lactose intoleranceScientific evidenceAdverse health outcomesImportant clinical syndromeHealth care providersSymptoms of individualsAdult endocrinologyDietary ApproachesBone healthVitamin DClinical syndromeDairy avoidanceFetal nutritionResponsible assessmentLactose malabsorptionMineral metabolismCare providersTrue prevalenceDairy consumptionHealth outcomesMinnesota EvidencePractice centerHealthcare providers
2003
Nutritional Rickets with Normal Circulating 25-Hydroxyvitamin D: A Call for Reexamining the Role of Dietary Calcium Intake in North American Infants
DeLucia MC, Mitnick ME, Carpenter TO. Nutritional Rickets with Normal Circulating 25-Hydroxyvitamin D: A Call for Reexamining the Role of Dietary Calcium Intake in North American Infants. The Journal Of Clinical Endocrinology & Metabolism 2003, 88: 3539-3545. PMID: 12915633, DOI: 10.1210/jc.2002-021935.Peer-Reviewed Original ResearchConceptsDietary calcium intakeNutritional ricketsCalcium intakeNorth American infantsAmerican infantsLow dietary calcium intakeOptimal dietary practicesVitamin D supplementationVitamin D deficiencyVitamin D therapyGreater New HavenD supplementationRachitic abnormalitiesD deficiencyD therapyDevelopment of diseaseVitamin DMean ageRepresentative case historiesBiochemical resolutionDietary practicesRicketsContributory roleMiddle Eastern descentInfants
1995
Media Calcium Attenuates Mitochondrial 1,25(OH)2D Production in Phosphorus or Vitamin D-Deprived Rats
Carpenter T, Ellis B. Media Calcium Attenuates Mitochondrial 1,25(OH)2D Production in Phosphorus or Vitamin D-Deprived Rats. Pediatric Research 1995, 37: 726-730. PMID: 7544454, DOI: 10.1203/00006450-199506000-00009.Peer-Reviewed Original ResearchConceptsVitamin D deprivationLow phosphorus dietVitamin DPhosphorus dietPrimary physiologic regulatorCalcium effectDeficient dietLong-term exposureCalcium modulatesMedium calciumPhysiologic regulatorRatsControl dietMarked inhibitionEffect of calciumStimulatory responseRenal mitochondriaExtramitochondrial calciumDietWkBasal activityPTHTerm exposureCalciumDeprivation
1989
Hypercalciuric hypophosphatemic rickets, mineral balance, bone histomorphometry, and therapeutic implications of hypercalciuria.
Chen C, Carpenter T, Steg N, Baron R, Anast C. Hypercalciuric hypophosphatemic rickets, mineral balance, bone histomorphometry, and therapeutic implications of hypercalciuria. Pediatrics 1989, 84: 276-80. PMID: 2787497, DOI: 10.1542/peds.84.2.276.Peer-Reviewed Original ResearchConceptsYears of ageHypophosphatemic ricketsDihydroxyvitamin DVitamin DHigh-dose vitamin DUrinary phosphorus excretionUrinary calcium excretionNormal serum calciumParathyroid hormone concentrationsPhosphorus therapyCalcium excretionSymptomatic nephrolithiasisAppropriate therapySerum calciumAlkaline phosphatase activitySevere ricketsBone histomorphometryHormone concentrationsIntestinal absorptionTherapeutic implicationsCardinal featuresRicketsModest dosageHypercalciuriaHypophosphatemiaMineral regulation of vitamin D metabolism
Carpenter T. Mineral regulation of vitamin D metabolism. Bone And Mineral 1989, 5: 259-269. PMID: 2655775, DOI: 10.1016/0169-6009(89)90004-4.Peer-Reviewed Original ResearchConceptsVitamin D metabolismD metabolismVitamin D deficiencyForms of ricketsD deficiencyVitamin DRenal activityVivo effectsHomeostatic roleIntestinal transportRachitic deformitiesActive metaboliteMineral homeostasisClinical researchMagnesium deficiencyCalcium transportConcentration of calciumMetabolismPediatrician's interestPresent dataStimulationCalciumPhosphorus regulationDeficiencyLesser extent