2024
Healthcare resource use associated with tumor-induced osteomalacia: a literature review
de Beur S, Dahir K, Imel E, Zanchetta M, Williams A, Li Z, Webb N, Crowe V, Johnson B, Carpenter T. Healthcare resource use associated with tumor-induced osteomalacia: a literature review. The Journal Of Clinical Endocrinology & Metabolism 2024, dgae431. PMID: 38913723, DOI: 10.1210/clinem/dgae431.Peer-Reviewed Original ResearchTumor-induced osteomalaciaHealthcare resource useResection outcomesCase reportHigher probability of tumor recurrenceSecrete fibroblast growth factor 23Probability of tumor recurrenceAssociated with tumor-induced osteomalaciaFibroblast growth factor 23Symptoms to diagnosisHealthcare resource burdenTumor recurrenceParaneoplastic syndromeTumor resectionAssociated with greater usePharmacological treatmentDisease characteristicsImaging testsPatientsMusculoskeletal symptomsTargeted literature reviewResource useOrthopedic surgeryProgressive disabilityMean timeQuantitative correlation of ENPP1 pathogenic variants with disease phenotype
Ansh A, Stabach P, Ciccone C, Cao W, De La Cruz E, Sabbagh Y, Carpenter T, Ferreira C, Braddock D. Quantitative correlation of ENPP1 pathogenic variants with disease phenotype. Bone 2024, 186: 117136. PMID: 38806089, PMCID: PMC11227391, DOI: 10.1016/j.bone.2024.117136.Peer-Reviewed Original ResearchEctonucleotide pyrophosphatase/phosphodiesterase 1Pathogenic variantsDisease phenotypeEnzyme velocityCompound heterozygotesEnzyme activityVariable enzyme activityAutosomal dominant phenotypeHigh-throughput assayAutosomal recessive formInnate immune responseENPP1 variantsDamaging variantsENPP1 deficiencyCole diseaseDominant phenotypeAutosomal dominant diseaseCatalytic velocityRecessive formEnzymePhenotypeWT levelsBio-active moleculesClinical phenotypeDominant diseaseImpact of burosumab on lower limb alignment in children with X-linked hypophosphatemia
Frumberg D, Merritt J, Chen A, Carpenter T. Impact of burosumab on lower limb alignment in children with X-linked hypophosphatemia. Journal Of The Pediatric Orthopaedic Society Of North America 2024, 6: 100012. DOI: 10.1016/j.jposna.2024.100012.Peer-Reviewed Original ResearchMechanical femoral-tibial angleLower limbsNeutral alignmentLower limb malalignmentLower limb alignmentLevel of Evidence IIIX-linked hypophosphatemiaLower limb deformitiesFemoral-tibial angleLower limb radiographsValgus limbsLimb malalignmentImpact of burosumabLimb alignmentLimb radiographsCrossover armAngular deformityNormal limbsLimb deformitiesLimbVarusMalalignmentClinically normal limbsHemiepiphysiodesisBaseline
2023
Effect of Burosumab on Muscle Function and Strength, and Rates of ATP Synthesis in Skeletal Muscle in Adults With XLH
Insogna K, Sullivan R, Parziale S, Deng Y, Carrano D, Simpson C, Dufour S, Carpenter T, Petersen K. Effect of Burosumab on Muscle Function and Strength, and Rates of ATP Synthesis in Skeletal Muscle in Adults With XLH. The Journal Of Clinical Endocrinology & Metabolism 2023, 109: e1061-e1071. PMID: 37930769, DOI: 10.1210/clinem/dgad642.Peer-Reviewed Original ResearchSymptoms of painMuscle function testsFunction testsMuscle strengthMuscle functionSkeletal muscleLower extremity joint painSTS testMuscle function studiesImproved muscle functionTreatment-naïve adultsSynthesis rateMonths of studyJoint painThird doseSymptomatic adultsClinical trialsRight calfATP synthesis rateBurosumabPainMuscle concentrationsXLHSymptomsMuscleENPP1 in Blood and Bone: Skeletal and Soft Tissue Diseases Induced by ENPP1 Deficiency
Ferreira C, Carpenter T, Braddock D. ENPP1 in Blood and Bone: Skeletal and Soft Tissue Diseases Induced by ENPP1 Deficiency. Annual Review Of Pathology Mechanisms Of Disease 2023, 19: 507-540. PMID: 37871131, PMCID: PMC11062289, DOI: 10.1146/annurev-pathmechdis-051222-121126.Peer-Reviewed Original ResearchGeneral medical populationENPP1 deficiencyMedical populationsEctonucleotide pyrophosphatase/phosphodiesteraseSoft tissue diseaseEarly-onset osteoporosisMiddle-aged adultsClinical presentationTissue diseaseVascular calcificationArterial calcificationBedside developmentRare diseaseMineralization disordersLarge arteriesPyrophosphatase/phosphodiesteraseClinical phenotypeExtracellular ATPSoft tissuePathophysiologyAdenosine monophosphateDiseaseCalcificationTransmembrane glycoproteinDeficiencyCirculating Levels of Leptin and Lipocalin-2 in Patients With X-Linked Hypophosphatemia
Simpson C, Santoro A, Carpenter T, Deng Y, Parziale S, Insogna K. Circulating Levels of Leptin and Lipocalin-2 in Patients With X-Linked Hypophosphatemia. Journal Of The Endocrine Society 2023, 7: bvad116. PMID: 37860221, PMCID: PMC10583534, DOI: 10.1210/jendso/bvad116.Peer-Reviewed Original ResearchLipocalin-2Control subjectsGreater riskLevels of LCN2Excessive weight gainLevels of leptinSerum leptin levelsCirculating LevelsLCN2 levelsSerum levelsYear age cohortLeptin levelsMetabolic abnormalitiesRetrospective studyAge cohortsInsulin sensitivityHigh prevalencePatientsWeight gainXLHLeptinAge 2HypophosphatemiaObesityChildrenKlotho Overexpression Is Frequently Associated With Upstream Rearrangements in Fusion-Negative Phosphaturic Mesenchymal Tumors of Bone and Sinonasal Tract
Lee J, Hsieh T, Kao Y, Tsai C, Huang H, Shih C, Song H, Oda Y, Chih-Hsueh Chen P, Pan C, Sittampalam K, Petersson F, Konishi E, Chiu W, Chen C, Carpenter T, Lu T, Chang C, Huang S, Folpe A. Klotho Overexpression Is Frequently Associated With Upstream Rearrangements in Fusion-Negative Phosphaturic Mesenchymal Tumors of Bone and Sinonasal Tract. Modern Pathology 2023, 36: 100336. PMID: 37742927, DOI: 10.1016/j.modpat.2023.100336.Peer-Reviewed Original ResearchConceptsPhosphaturic mesenchymal tumorMesenchymal tumorsSinonasal tractFibroblast growth factor 23Growth factor 23Fusion-positive casesBreak-apart fluorescenceSinonasal locationFISH-positive casesFinal cohortFactor 23Situ hybridizationUncommon neoplasmLarge cohortKlotho overexpressionFGFR1 inhibitionTumorsKL expressionCohortSoft tissueWhole genomic sequencingPromoter methylationConcordant resultsPatientsFurther investigationA De Novo Deleterious PHEX Variant Without Clinical Features of X-Linked Hypophosphatemia
Kayser M, Jain P, Bale A, Carpenter T. A De Novo Deleterious PHEX Variant Without Clinical Features of X-Linked Hypophosphatemia. JCEM Case Reports 2023, 1: luad082. PMID: 37908207, PMCID: PMC10586592, DOI: 10.1210/jcemcr/luad082.Peer-Reviewed Original ResearchSkewed X-inactivationFibroblast growth factor 23Growth factor 23Intrauterine growth restrictionSingle nucleotide polymorphismsDiagnosis of XLHClinical featuresFactor 23Duodenal atresiaRadiographic featuresGrowth restrictionPostnatal genetic testingAndrogen receptor locusPotential treatmentGenetic testingHypophosphatemiaXLHHereditary ricketsDominant disorderPrenatal identificationCommon formHemizygous malesHeterozygous disruptionRicketsHeterozygous femalesHypophosphatemic 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 1Genetic variants in the vitamin D pathway and their association with vitamin D metabolite levels: Detailed studies of an inner-city pediatric population suggest a modest but significant effect in early childhood
Fu L, Wong B, Li Z, Horst R, Williams R, Lee B, Miller J, Carpenter T, Cole D. Genetic variants in the vitamin D pathway and their association with vitamin D metabolite levels: Detailed studies of an inner-city pediatric population suggest a modest but significant effect in early childhood. The Journal Of Steroid Biochemistry And Molecular Biology 2023, 233: 106369. PMID: 37490983, DOI: 10.1016/j.jsbmb.2023.106369.Peer-Reviewed Original ResearchConceptsVitamin D pathwayD binding proteinPediatric populationInner-city pediatric populationVitamin D metabolite levelsVitamin D insufficiencyRisk pediatric populationsVitamin D metabolismVitamin D binding proteinVitamin D metabolitesD pathwayMonths of ageSanger sequencing confirmationD insufficiencyHealthy infantsD metabolismD levelsD metabolitesMultivariate regression modelLarge cohortMetabolite levelsRelevant associationsPotential roleEarly childhoodInter-individual differencesImproving care pathways for people living with rare bone diseases (RBDs): outcomes from the first RBD Summit
Chandran M, Alves I, Carpenter T, Davis M, Hsiao E, Petryk A, Semler J, Sleiman M. Improving care pathways for people living with rare bone diseases (RBDs): outcomes from the first RBD Summit. Osteoporosis International 2023, 34: 1301-1310. PMID: 37294334, PMCID: PMC10382343, DOI: 10.1007/s00198-023-06791-x.Peer-Reviewed Original ResearchConceptsCare pathwaysRare bone diseasesImprove care pathwaysImprove patient outcomesObstacles to diagnosisCare providersHealthcare professionalsExpert carePatient communityUnmet needsImprove awarenessPatient outcomesDiagnostic delayAction planCareBone diseaseCommunication gapHeterogeneous group of disordersVirtual meetingsGroup of disordersOutcomesPeopleHealthcareInformation exchangeSpecial treatmentX-linked hypophosphatemia in 4 generations due to an exon 13–15 duplication in PHEX, in the absence of the c.*231A>G variant
Soto Barros J, Sanchez S, Cabral K, Beggs A, Agrawal P, Genetti C, Brownstein C, Carpenter T. X-linked hypophosphatemia in 4 generations due to an exon 13–15 duplication in PHEX, in the absence of the c.*231A>G variant. Bone 2023, 172: 116763. PMID: 37059315, PMCID: PMC10198939, DOI: 10.1016/j.bone.2023.116763.Peer-Reviewed Original ResearchExcluding Digenic Inheritance of PGAP2 and PGAP3 Variants in Mabry Syndrome (OMIM 239300) Patient: Phenotypic Spectrum Associated with PGAP2 Gene Variants in Hyperphosphatasia with Mental Retardation Syndrome-3 (HPMRS3)
Thompson M, Li X, Spencer-Manzon M, Andrade D, Murakami Y, Kinoshita T, Carpenter T. Excluding Digenic Inheritance of PGAP2 and PGAP3 Variants in Mabry Syndrome (OMIM 239300) Patient: Phenotypic Spectrum Associated with PGAP2 Gene Variants in Hyperphosphatasia with Mental Retardation Syndrome-3 (HPMRS3). Genes 2023, 14: 359. PMID: 36833286, PMCID: PMC9957281, DOI: 10.3390/genes14020359.Peer-Reviewed Original ResearchConceptsDigenic inheritanceDeficient CHO cell lineCell linesGPI deficiency disordersDeficient cell linesCHO cell linesBiosynthesis genesGPI attachmentMabry syndromeProtein geneStrong promoterCHO cellsUnknown significanceGenesInheritanceGene variantsAutosomal recessive inheritanceHomozygous variantNeurologic deficitsVariantsCase reportRecessive inheritanceSyndrome patientsCD55 expressionPGAP2
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 levelsResponse of enthesopathy in ENPP1 deficiency to enzyme replacement therapy in murine models and enthesopathy comorbidities and quality of life in ENPP1‐deficient adults
Ansh A, Nester C, O'Brien C, Stabach P, Murtada S, Lester E, Khursigara G, Molloy L, Carpenter T, Ferreira C, Braddock D. Response of enthesopathy in ENPP1 deficiency to enzyme replacement therapy in murine models and enthesopathy comorbidities and quality of life in ENPP1‐deficient adults. The FASEB Journal 2022, 36 DOI: 10.1096/fasebj.2022.36.s1.r5311.Peer-Reviewed Original ResearchENPP1 deficiencyQuality of lifeMusculoskeletal complicationsReplacement therapyBrief Pain Inventory-Short FormPhysical Function Short FormAchilles tendon calcificationHealth-related qualityMajority of patientsCervical spine fusionPresence of enthesopathyAnalgesic medicationRegular chowResidual painAdult patientsDose escalationPhysical functionCardiovascular calcificationTendon calcificationAchilles tendonSpine fusionMurine modelHypophosphatemic ricketsEnzyme replacementPatientsSystematic characterization of enzyme activity on ENPP1 deficiency disease phenotype
Ansh A, Stabach P, Carpenter T, Ferreira C, Braddock D. Systematic characterization of enzyme activity on ENPP1 deficiency disease phenotype. The FASEB Journal 2022, 36 DOI: 10.1096/fasebj.2022.36.s1.r5223.Peer-Reviewed Original ResearchCover, Volume 43, Issue 2
Sarafrazi S, Daugherty S, Miller N, Boada P, Carpenter T, Chunn L, Dill K, Econs M, Eisenbeis S, Imel E, Johnson B, Kiel M, Krolczyk S, Ramesan P, Truty R, Sabbagh Y. Cover, Volume 43, Issue 2. Human Mutation 2022, 43: i-i. DOI: 10.1002/humu.24334.Peer-Reviewed Original ResearchHypercalcaemic and Hypocalcaemic Syndromes in Children
Ardeshirpour L, Carpenter T, Robinson C. Hypercalcaemic and Hypocalcaemic Syndromes in Children. 2022, 707-726. DOI: 10.1093/med/9780198870197.003.0087.Peer-Reviewed Original ResearchAge-specific approachesAge-dependent changesCalciotropic hormonesHormonal milieuMineral disordersCorrect diagnosisClinical problemCalcium homeostasisMineral homeostasisRelevant therapiesSerum mineralsMineral accretionRelevant physiologyHeritable disorderSyndromeChildhoodDiagnosisDisordersChildrenHomeostasisMineral requirementsEarly stagesHypercalcaemiaHypocalcaemiaTherapy