2023
Hypophosphatemic rickets: An unexplained early feature of craniometaphyseal dysplasia
Barros J, Braddock D, Carpenter T. Hypophosphatemic rickets: An unexplained early feature of craniometaphyseal dysplasia. Bone Reports 2023, 19: 101707. PMID: 37654679, PMCID: PMC10466911, DOI: 10.1016/j.bonr.2023.101707.Peer-Reviewed Original ResearchMonths of ageCraniometaphyseal dysplasiaLow serum phosphorusElevated serum alkaline phosphatase activityHeterozygous pathogenic variantsSerum alkaline phosphatase activityHigh tubular reabsorptionProgressive hyperostosisSecondary hyperparathyroidismRadiographic improvementSerum phosphorusTubular reabsorptionRadiographic changesCranial nervesEarly featureMetaphyseal flaringPathogenic variantsDysplasiaRicketsSkeletal dysplasiaBiochemical profileMonthsLong bonesCraniofacial bonesAge 1
2022
OR13-1 Long-Term Burosumab Therapy Provides Sustained Benefit in Patients with Tumor-Induced Osteomalacia: End of Study Findings From the Pivotal Phase 2 Study
Carpenter T, Cimms T, Hetzer J, Insogna K, Kumar R, Merritt J, Miller P, Peacock M, Rauch F, Stanciu I, Weber T, De Beur S. OR13-1 Long-Term Burosumab Therapy Provides Sustained Benefit in Patients with Tumor-Induced Osteomalacia: End of Study Findings From the Pivotal Phase 2 Study. Journal Of The Endocrine Society 2022, 6: a191-a191. PMCID: PMC9624705, DOI: 10.1210/jendso/bvac150.394.Peer-Reviewed Original ResearchTumor-induced osteomalaciaWeek 240Week 144Week 24Serum phosphorusBurosumab therapyWeek 48Bone biomarkersSafety profileNormal rangeExcess fibroblast growth factor 23SF-36 bodily pain scoresTreatment of TIOPivotal phase 2 studySF-36 physical healthSF-36 vitality scoreFibroblast growth factor 23Surface/bone surfaceBodily pain scoresMean serum phosphorusObserved safety profileRadionucleotide bone scansRare paraneoplastic syndromeBrief Pain InventoryOsteoid surface/bone surfaceOR13-2 Characterizing the Impact of Burosumab on Bone Health in Children with X-Linked Hypophosphatemia: Results from Year 1 of the Disease Monitoring Program
Carpenter T, Cassinelli H, Glorieux F, Hetzer J, Merritt J, Moreira C, Portale A, Ward L, Woo C, Imel E. OR13-2 Characterizing the Impact of Burosumab on Bone Health in Children with X-Linked Hypophosphatemia: Results from Year 1 of the Disease Monitoring Program. Journal Of The Endocrine Society 2022, 6: a191-a192. PMCID: PMC9624613, DOI: 10.1210/jendso/bvac150.395.Peer-Reviewed Original ResearchSerum alkaline phosphatase levelsNew safety concernsAlkaline phosphatase levelsLower limb deformitiesGroup 1Serum phosphorusGroup 2Group 3Burosumab therapyBone healthPhosphatase levelsHeight z-score changeLimb deformitiesHuman IgG1 monoclonal antibodyYear 1 visitRecombinant human IgG1 monoclonal antibodySerum phosphorus levelsZ-score changeYears of treatmentRadiographic Global ImpressionYear 1Safety concernsIgG1 monoclonal antibodyBone painDMP enrolmentThe efficacy and safety of burosumab in two patients with cutaneous skeletal hypophosphatemia syndrome
Sugarman J, Maruri A, Hamilton D, Tabatabai L, Luca D, Cimms T, Krolczyk S, Roberts M, Carpenter T. The efficacy and safety of burosumab in two patients with cutaneous skeletal hypophosphatemia syndrome. Bone 2022, 166: 116598. PMID: 36341949, DOI: 10.1016/j.bone.2022.116598.Peer-Reviewed Original ResearchConceptsCutaneous skeletal hypophosphatemia syndromeTumor-induced osteomalaciaBurosumab therapyDaily dosesMild injection site reactionsActive vitamin D analoguesExtra-cutaneous manifestationsMore daily dosesMultiple daily dosesSafety of burosumabTreatment of XLHDihydroxyvitamin D levelsInjection site reactionsCurrent treatment optionsLow serum phosphorusPromising therapeutic optionVitamin D analogsHuman monoclonal antibodyOral phosphorusAdult patientsAdverse eventsBone healthSerum phosphorusTherapeutic optionsD levels
2020
Long-Term Follow-up of Hypophosphatemic Bone Disease Associated With Elemental Formula Use: Sustained Correction of Bone Disease After Formula Change or Phosphate Supplementation
Eswarakumar AS, S. N, Ward LM, Backeljauw P, Wasserman H, Weber DR, DiMeglio LA, Imel EA, Gagne J, Cody D, Zimakas P, Topor LS, Agrawal S, Calabria A, Tebben P, Faircloth RS, Gordon R, Casey L, Carpenter TO. Long-Term Follow-up of Hypophosphatemic Bone Disease Associated With Elemental Formula Use: Sustained Correction of Bone Disease After Formula Change or Phosphate Supplementation. Clinical Pediatrics 2020, 59: 1080-1085. PMID: 32666808, DOI: 10.1177/0009922820941097.Peer-Reviewed Original ResearchConceptsElemental formula useBone diseaseFormula useHypophosphatemic bone diseaseTerm Follow-upLong-term outcomesSerum phosphorus concentrationSerum alkaline phosphatase activitySerum alkaline phosphataseSeverity/durationTime of correctionChart reviewSerum phosphorusDisease AssociatedFollow-upPhosphate supplementationExtent of recoveryDiseaseDiagnosisFormula changesRadiology reportsSupplementationAlkaline phosphataseAlkaline phosphatase activityReportOR29-01 Long-Term Safety in Adults with X-Linked Hypophosphatemia (XLH) Treated with Burosumab, a Fully Human Monoclonal Antibody Against FGF23: Final Results of a Phase 3 Trial
Perwad F, Portale A, Carpenter T, Briot K, Imel E, Kamenicky P, Weber T, Pitukcheewanont P, Cheong H, De Beur S, Imanishi Y, Ito N, Lachmann R, Tanaka H, Zhang L, Skrinar A, Rees L, Insogna K. OR29-01 Long-Term Safety in Adults with X-Linked Hypophosphatemia (XLH) Treated with Burosumab, a Fully Human Monoclonal Antibody Against FGF23: Final Results of a Phase 3 Trial. Journal Of The Endocrine Society 2020, 4: or29-01. PMCID: PMC7209551, DOI: 10.1210/jendso/bvaa046.147.Peer-Reviewed Original ResearchYears of ageSerum phosphorusWeek 96Dose reductionLong-term safety resultsTreatment-emergent adverse eventsMonoclonal antibodiesBaseline serum phosphorusHuman IgG1 monoclonal antibodyMean iPTH levelPhase 3 trialLong-term safetyHuman monoclonal antibodyConditional marketing authorizationMonths of ageIgG1 monoclonal antibodyIPTH levelsPlacebo groupAdverse eventsTreatment withdrawalWeek 24Radiographic evidenceMulticenter studyBurosumab treatmentMild hyperphosphatemiaOR29-06 Burosumab Improves Biochemical, Skeletal, and Clinical Features of Tumor-Induced Osteomalacia Syndrome
Carpenter T, Miller P, Weber T, Peacock M, Insogna K, Kumar R, Luca D, Cimms T, Roberts M, de Beur S. OR29-06 Burosumab Improves Biochemical, Skeletal, and Clinical Features of Tumor-Induced Osteomalacia Syndrome. Journal Of The Endocrine Society 2020, 4: or29-06. PMCID: PMC7208350, DOI: 10.1210/jendso/bvaa046.403.Peer-Reviewed Original ResearchTumor-induced osteomalaciaCutaneous skeletal hypophosphatemia syndromeSerious adverse eventsAdverse eventsSerum phosphorusBone biopsyPhysical functioningMean physical component summary scoreOpen-label phase 2 studyPhysical component summary scoreOsteoid volume/bone volumeSurface/bone surfaceProximal muscle functionBrief Pain InventoryOsteoid surface/bone surfacePhase 2 studyComponent summary scoresTmP/GFRCrest bone biopsiesRenal phosphate wastingHuman monoclonal antibodyMineralization lag timeQuality of lifeExcess FGF23Bone scan
2019
OR13-1 Burosumab Improves the Biochemical, Skeletal, and Clinical Symptoms of Tumor-Induced Osteomalacia Syndrome
De Beur S, Miller P, Weber T, Peacock M, Insogna K, Kumar R, Luca D, Theodore-Oklota C, Lampl K, San Martin J, Carpenter T. OR13-1 Burosumab Improves the Biochemical, Skeletal, and Clinical Symptoms of Tumor-Induced Osteomalacia Syndrome. Journal Of The Endocrine Society 2019, 3: or13-1. PMCID: PMC6554835, DOI: 10.1210/js.2019-or13-1.Peer-Reviewed Original ResearchMineralization lag timeTumor-induced osteomalaciaSerum phosphorusAdverse eventsOsteoid thicknessTumor progressionBone biopsyDose intervalMean physical component summary scoreOpen-label phase 2 studyPP groupPhysical component summary scoreOsteoid volume/bone volumeSurface/bone surfaceMean serum phosphorusPhase 2 studySerious adverse eventsOsteoid surface/bone surfaceComponent summary scoresCrest bone biopsiesMean percentage changeEpidermal nevus syndromeRenal phosphate wastingHuman monoclonal antibodyOS/BSEfficacy and safety of burosumab in children aged 1–4 years with X-linked hypophosphataemia: a multicentre, open-label, phase 2 trial
Whyte MP, Carpenter TO, Gottesman GS, Mao M, Skrinar A, San Martin J, Imel EA. Efficacy and safety of burosumab in children aged 1–4 years with X-linked hypophosphataemia: a multicentre, open-label, phase 2 trial. The Lancet Diabetes & Endocrinology 2019, 7: 189-199. PMID: 30638856, DOI: 10.1016/s2213-8587(18)30338-3.Peer-Reviewed Original ResearchConceptsSerum phosphorus concentrationPhase 2 trialWeeks of treatmentAdverse eventsWeek 40Week 64Serum phosphorusPhosphatonin fibroblast growth factor 23Treatment-related adverse eventsFibroblast growth factor 23History of toothRickets Severity ScoreSafety of burosumabSerious adverse eventsInjection site reactionsKey secondary outcomesFavorable safety profileGrowth factor 23Severe food allergyHeight z-scoreKey inclusion criteriaRenal phosphate wastingHuman monoclonal antibodyRadiographic Global ImpressionYoung children
2018
Three-Month Randomized Clinical Trial of Nasal Calcitonin in Adults with X-linked Hypophosphatemia
Sullivan R, Abraham A, Simpson C, Olear E, Carpenter T, Deng Y, Chen C, Insogna KL. Three-Month Randomized Clinical Trial of Nasal Calcitonin in Adults with X-linked Hypophosphatemia. Calcified Tissue International 2018, 102: 666-670. PMID: 29383408, PMCID: PMC5957766, DOI: 10.1007/s00223-017-0382-0.Peer-Reviewed Original ResearchConceptsLevels of FGF23Nasal salmon calcitoninSalmon calcitoninStudy drugVisit 2Day 2Levels of PTHPrincipal outcome variableTmP/GFRSingle subcutaneous dosePlacebo nasal sprayNasal calcitoninSerum calciumSubcutaneous doseVisit 4Dihydroxyvitamin DSerum phosphorusVisit 3Final doseVisit 1Nasal sprayClinical trialsSerial measurementsDrug doseFGF23 production
2015
Prolonged Correction of Serum Phosphorus in Adults With X-Linked Hypophosphatemia Using Monthly Doses of KRN23
Imel EA, Zhang X, Ruppe MD, Weber TJ, Klausner MA, Ito T, Vergeire M, Humphrey JS, Glorieux FH, Portale AA, Insogna K, Peacock M, Carpenter TO. Prolonged Correction of Serum Phosphorus in Adults With X-Linked Hypophosphatemia Using Monthly Doses of KRN23. The Journal Of Clinical Endocrinology & Metabolism 2015, 100: 2565-2573. PMID: 25919461, PMCID: PMC4495171, DOI: 10.1210/jc.2015-1551.Peer-Reviewed Original ResearchMeSH KeywordsAdultAgedAntibodies, MonoclonalAntibodies, Monoclonal, HumanizedDose-Response Relationship, DrugDrug Administration ScheduleFamilial Hypophosphatemic RicketsFemaleFibroblast Growth Factor-23Fibroblast Growth FactorsGlomerular Filtration RateHumansImmunoglobulin GMaleMiddle AgedPhosphorusRecombinant ProteinsTreatment OutcomeYoung AdultConceptsTmP/GFRSerum PiNormal rangeOpen-label phase 1/2 studyElevated fibroblast growth factor 23Fibroblast growth factor 23Phase 1/2 studyDose-escalation studyGlomerular filtration ratePre-dose levelsGrowth factor 23Favorable safety profileMain outcome measuresProportion of subjectsAcademic medical centerPeak PiSerum inorganic phosphorusPg/mLUrinary calciumDose escalationFactor 23Monthly dosesSerum phosphorusDihydroxyvitamin DSafety profile
2014
Effect of Paricalcitol on Circulating Parathyroid Hormone in X-Linked Hypophosphatemia: A Randomized, Double-Blind, Placebo-Controlled Study
Carpenter TO, Olear EA, Zhang JH, Ellis BK, Simpson CA, Cheng D, Gundberg CM, Insogna KL. Effect of Paricalcitol on Circulating Parathyroid Hormone in X-Linked Hypophosphatemia: A Randomized, Double-Blind, Placebo-Controlled Study. The Journal Of Clinical Endocrinology & Metabolism 2014, 99: 3103-3111. PMID: 25029424, PMCID: PMC4154090, DOI: 10.1210/jc.2014-2017.Peer-Reviewed Original ResearchMeSH KeywordsAdolescentAdultAgedAlkaline PhosphataseBone Density Conservation AgentsChildDouble-Blind MethodErgocalciferolsFamilial Hypophosphatemic RicketsFemaleFibroblast Growth Factor-23Fibroblast Growth FactorsHumansHyperparathyroidismMaleMiddle AgedParathyroid HormonePhosphorusPlacebosProspective StudiesTreatment OutcomeVitamin DYoung AdultConceptsRenal phosphate thresholdGlomerular filtration rateBone scanSerum phosphorusFiltration rateXLH patientsEffect of paricalcitolUse of paricalcitolPlacebo-treated subjectsElevated PTH levelsSerum calcium levelsSuppression of PTHHospital research unitSerum alkaline phosphatase activityPTH levelsCreatinine levelsSecondary outcomesStandard therapyUrinary calciumPlacebo subjectsParathyroid hormoneSerum calciumAlkaline phosphatase activityD levelsSkeletal improvement