2022
Response 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 replacementPatients
2019
Description of 5 Novel SLC34A3/NPT2c Mutations Causing Hereditary Hypophosphatemic Rickets With Hypercalciuria
Chen A, Ro H, Mundra VRR, Joseph K, Brenner D, Carpenter TO, Rizk DV, Bergwitz C. Description of 5 Novel SLC34A3/NPT2c Mutations Causing Hereditary Hypophosphatemic Rickets With Hypercalciuria. Kidney International Reports 2019, 4: 1179-1186. PMID: 31440709, PMCID: PMC6698313, DOI: 10.1016/j.ekir.2019.05.004.Peer-Reviewed Original ResearchHereditary hypophosphatemic ricketsHypophosphatemic rickets
2015
Contemporary Medical and Surgical Management of X-linked Hypophosphatemic Rickets
Sharkey MS, Grunseich K, Carpenter TO. Contemporary Medical and Surgical Management of X-linked Hypophosphatemic Rickets. Journal Of The American Academy Of Orthopaedic Surgeons 2015, 23: 433-442. PMID: 26040953, DOI: 10.5435/jaaos-d-14-00082.Peer-Reviewed Original ResearchConceptsBony deformityProgressive bony deformityCornerstone of treatmentCareful surgical planningOrthopedic surgical proceduresMedical therapyMedical managementSurgical managementGradual correctionSurgical techniqueDeformity correctionSurgical proceduresBone deformitiesHypophosphatemic ricketsMedical treatmentRenal phosphateHypophosphatemiaContemporary medicalBone pathologySuccessful correctionSurgical planningDeformityInheritable disorderTreatmentAdults
2013
Exome sequencing reveals FAM20c mutations associated with fibroblast growth factor 23–related hypophosphatemia, dental anomalies, and ectopic calcification
Rafaelsen SH, Ræder H, Fagerheim AK, Knappskog P, Carpenter TO, Johansson S, Bjerknes R. Exome sequencing reveals FAM20c mutations associated with fibroblast growth factor 23–related hypophosphatemia, dental anomalies, and ectopic calcification. Journal Of Bone And Mineral Research 2013, 28: 1378-1385. PMID: 23325605, DOI: 10.1002/jbmr.1850.Peer-Reviewed Original ResearchConceptsFibroblast growth factor 23Growth factor 23Factor 23Dental anomaliesExome sequencingAbsence of ricketsFAM20C mutationsCompound heterozygous mutationsWhole-exome sequencingIntracerebral calcificationsFGF23 levelsFamilial hypophosphatemiaHypophosphatemic ricketsEctopic calcificationHypophosphatemiaPutative new mechanismsType 1Heterozygous mutationsUndiagnosed probandsLong bonesNorwegian populationCausal roleHuman subjectsSequence similarity 20RicketsHeart Failure in Hypophosphatemic Rickets: Complications from High-Dose Phosphate Therapy
Sun GE, Suer O, Carpenter TO, Tan CD, Li-Ng M. Heart Failure in Hypophosphatemic Rickets: Complications from High-Dose Phosphate Therapy. Endocrine Practice 2013, 19: e8-e11. PMID: 23186962, DOI: 10.4158/ep12184.cr.Peer-Reviewed Original ResearchConceptsYears of ageHypophosphatemic ricketsPhosphate therapyTertiary hyperparathyroidismHeart failureCardiac calcificationSevere calcific coronary artery diseaseCalcific coronary artery diseaseAortic valve replacementCoronary artery calcificationCongestive heart failureCoronary artery diseaseManagement of patientsHeart valve calcificationImplantable cardioverter defibrillatorPathophysiology of calcificationCalcitriol useCardiac complicationsArtery calcificationRenal failureValve replacementArtery diseaseClinical courseAppropriate therapyHeart block
2012
Chapter 26 Familial Hypophosphatemia and Related Disorders
Holm I, Econs M, Carpenter T. Chapter 26 Familial Hypophosphatemia and Related Disorders. 2012, 699-726. DOI: 10.1016/b978-0-12-382040-2.10026-7.Peer-Reviewed Original ResearchAutosomal dominant hypophosphatemic ricketsTumor-induced osteomalaciaRelated disordersClinical featuresHypophosphatemic ricketsPathophysiology of XLHLong-term morbidityDevelopment of ricketsDegenerative joint diseaseHereditary hypophosphatemic ricketsCommon bone diseaseDominant hypophosphatemic ricketsFGF-23Joint painDental abscessDihydroxyvitamin DAvailable therapiesFamilial hypophosphatemiaHypophosphatemic diseasesDental diseaseJoint diseaseBone diseaseChronic featuresTherapeutic approachesRenal phosphate
2008
A novel missense mutation in SLC34A3 that causes hereditary hypophosphatemic rickets with hypercalciuria in humans identifies threonine 137 as an important determinant of sodium-phosphate cotransport in NaPi-IIc
Jaureguiberry G, Carpenter TO, Forman S, Jüppner H, Bergwitz C. A novel missense mutation in SLC34A3 that causes hereditary hypophosphatemic rickets with hypercalciuria in humans identifies threonine 137 as an important determinant of sodium-phosphate cotransport in NaPi-IIc. American Journal Of Physiology. Renal Physiology 2008, 295: f371-f379. PMID: 18480181, PMCID: PMC2519180, DOI: 10.1152/ajprenal.00090.2008.Peer-Reviewed Original ResearchMeSH KeywordsAdultAllelesAnimalsBase SequenceExocytosisFamilial Hypophosphatemic RicketsFemaleHaplotypesHumansHypercalciuriaKidneyMaleMolecular Sequence DataMutation, MissenseOocytesOpossumsPhosphatesPolymorphism, Single NucleotideSodiumSodium-Phosphate Cotransporter ProteinsSodium-Phosphate Cotransporter Proteins, Type IIcThreonineXenopus laevisConceptsEncoding enhanced green fluorescent proteinHereditary hypophosphatemic ricketsNaPi-IIcSodium-phosphate cotransporterLoss of expressionAmino acid residuesSodium-phosphate cotransportGreen fluorescence proteinImportant functional roleComplete lossOpossum kidneyHypophosphatemic ricketsXenopus laevis oocytesNovel missense mutationPaternal alleleWild-typeFunctional analysisFluorescence proteinNH2 terminusAcid residuesApical patchesCompound heterozygous mutationsExpression plasmidFunctional roleRecurrent kidney stonesA translocation causing increased α-Klotho level results in hypophosphatemic rickets and hyperparathyroidism
Brownstein CA, Adler F, Nelson-Williams C, Iijima J, Li P, Imura A, Nabeshima Y, Reyes-Mugica M, Carpenter TO, Lifton RP. A translocation causing increased α-Klotho level results in hypophosphatemic rickets and hyperparathyroidism. Proceedings Of The National Academy Of Sciences Of The United States Of America 2008, 105: 3455-3460. PMID: 18308935, PMCID: PMC2265125, DOI: 10.1073/pnas.0712361105.Peer-Reviewed Original ResearchConceptsHypophosphatemic ricketsAlpha-KlothoExcessive renal lossPhosphate levelsParathyroid massRenal failureRenal osteodystrophyFGF23 levelsMajor complicationsParathyroid hyperplasiaKidney failureRenal lossBeta-glucuronidase activityNormal responseHyperparathyroidismEnergy homeostasisRicketsBone formationSkeletal abnormalitiesPhysiologic processesPhosphate homeostasisHyperphosphatemiaPatientsHyperplasiaBone defects
2005
SLC34A3 Mutations in Patients with Hereditary Hypophosphatemic Rickets with Hypercalciuria Predict a Key Role for the Sodium-Phosphate Cotransporter NaPi-IIc in Maintaining Phosphate Homeostasis
Bergwitz C, Roslin NM, Tieder M, Loredo-Osti JC, Bastepe M, Abu-Zahra H, Frappier D, Burkett K, Carpenter TO, Anderson D, Garabédian M, Sermet I, Fujiwara TM, Morgan K, Tenenhouse HS, Jüppner H. SLC34A3 Mutations in Patients with Hereditary Hypophosphatemic Rickets with Hypercalciuria Predict a Key Role for the Sodium-Phosphate Cotransporter NaPi-IIc in Maintaining Phosphate Homeostasis. American Journal Of Human Genetics 2005, 78: 179-192. PMID: 16358214, PMCID: PMC1380228, DOI: 10.1086/499409.Peer-Reviewed Original ResearchConceptsConsanguineous BedouinFirst membrane-spanning domainMembrane-spanning domainsPhosphate homeostasisRenal sodium-phosphate cotransporterNucleotide sequence analysisDihydroxyvitamin D levelsSingle nucleotide deletionHereditary hypophosphatemic ricketsCompound heterozygous missenseSLC34A3 mutationsHomozygous single nucleotide deletionHypophosphatemic ricketsLinkage scanCandidate genesGenomic DNASodium-phosphate cotransporterSequence analysisD levelsHomozygosity mappingDeletion mutationsGenomewide linkage scanKey roleChromosome 9q34Mutations
2003
Chapter 25 Familial Hypophosphatemia and Related Disorders
Holm I, Econs M, Carpenter T. Chapter 25 Familial Hypophosphatemia and Related Disorders. 2003, 603-xvi. DOI: 10.1016/b978-012286551-0/50027-0.Peer-Reviewed Original ResearchAutosomal dominant hypophosphatemic ricketsTumor-induced osteomalaciaRelated disordersHypophosphatemic ricketsPathophysiology of XLHDevelopment of ricketsDegenerative joint diseaseHereditary hypophosphatemic ricketsCommon bone diseaseJoint painDental abscessClinical featuresDihydroxyvitamin DFamilial hypophosphatemiaHypophosphatemic diseasesDental diseaseJoint diseaseBone diseaseRenal phosphateEndopeptidase PHEXShort statureHypophosphatemiaXLHDiseaseRickets
2001
Mutational Analysis and Genotype-Phenotype Correlation of the PHEX Gene in X-Linked Hypophosphatemic Rickets
Holm I, Nelson A, Robinson B, Mason R, Marsh D, Cowell C, Carpenter T. Mutational Analysis and Genotype-Phenotype Correlation of the PHEX Gene in X-Linked Hypophosphatemic Rickets. The Journal Of Clinical Endocrinology & Metabolism 2001, 86: 3889-3899. PMID: 11502829, DOI: 10.1210/jcem.86.8.7761.Peer-Reviewed Original ResearchMeSH KeywordsAdolescentAdultAgedAmino Acid SubstitutionBone DiseasesChildDNA Mutational AnalysisExonsFamilyFemaleGenotypeHumansHypophosphatemia, FamilialMaleMiddle AgedMutationMutation, MissenseNuclear FamilyPhenotypePHEX Phosphate Regulating Neutral EndopeptidaseProteinsSequence DeletionTooth DiseasesConceptsHypophosphatemic ricketsRickets patientsHypophosphatemic rickets patientsSevere skeletal diseasePHEX mutationsSeverity of diseaseFamily membersGenotype-phenotype correlationPrognostic valueFamily historyPatientsPostpubertal malesEarly identificationSkeletal diseaseGenetic testingRicketsTruncating mutationsDental phenotypeAffected individualsMild phenotypePHEX geneDiseaseMissense mutationsDifferent mutationsSeverityEctopic cardiac calcification associated with hyperparathyroidism in a boy with hypophosphatemic rickets
Moltz K, Friedman A, Nehgme R, Kleinman C, Carpenter T. Ectopic cardiac calcification associated with hyperparathyroidism in a boy with hypophosphatemic rickets. Current Opinion In Pediatrics 2001, 13: 373-375. PMID: 11717565, DOI: 10.1097/00008480-200108000-00015.Peer-Reviewed Original Research
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 dosageHypercalciuriaHypophosphatemia