2024
Effect of Mutation Type on Ectopic Ossification Among Adult Patients With X-Linked Hypophosphatemia
Kato H, Ishihara Y, Ohata Y, Irie K, Watanabe S, Kimura S, Hoshino Y, Hidaka N, Kinoshita Y, Taniguchi Y, Kobayashi H, Braddock D, Kubota T, Ozono K, Nangaku M, Makita N, Ito N. Effect of Mutation Type on Ectopic Ossification Among Adult Patients With X-Linked Hypophosphatemia. Journal Of The Endocrine Society 2024, 8: bvae184. PMID: 39498416, PMCID: PMC11532897, DOI: 10.1210/jendso/bvae184.Peer-Reviewed Original ResearchX-linked hypophosphatemiaNonsense-mediated decayEctopic ossificationPathogenic variantsSpinal computed tomography scansMutation typeInhibitor of tissue calcificationComputed tomography scanSpinal ligament ossificationGenotype-phenotype correlationKellgren-Lawrence classificationNon-consanguineous familyPHEX mutationsPHEX variantAdult patientsTomography scanLigament ossificationFibroblast growth factorYellow ligamentOS indexKellgren-LawrenceStudy populationTissue calcificationPatientsProtein functionQuantitative 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 disease
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 1Genetics of Diffuse Idiopathic Skeletal Hyperostosis and Ossification of the Spinal Ligaments
Kato H, Braddock D, Ito N. Genetics of Diffuse Idiopathic Skeletal Hyperostosis and Ossification of the Spinal Ligaments. Current Osteoporosis Reports 2023, 21: 552-566. PMID: 37530996, PMCID: PMC10543536, DOI: 10.1007/s11914-023-00814-6.Peer-Reviewed Reviews, Practice Guidelines, Standards, and Consensus StatementsConceptsDiffuse idiopathic skeletal hyperostosisAutosomal recessive hypophosphatemic rickets type 2Idiopathic skeletal hyperostosisSkeletal hyperostosisOPLL patientsGenetic factorsPathogenic variantsFibroblast growth factor 23Growth factor 23Posterior longitudinal ligamentSpinal ligament ossificationRecent FindingsRecent studiesStrong genetic factorImportant new biomarkerDisease courseFactor 23Longitudinal ligamentClinical evaluationPlasma biomarkersClinical trialsLigament ossificationPlasma PPiCalcification disordersPatientsEctopic calcification
2019
Clinical and Biochemical Phenotypes in a Family With ENPP1 Mutations
Kotwal A, Ferrer A, Kumar R, Singh RJ, Murthy V, Schultz-Rogers L, Zimmermann M, Lanpher B, Zimmerman K, Stabach PR, Klee E, Braddock DT, Wermers RA. Clinical and Biochemical Phenotypes in a Family With ENPP1 Mutations. Journal Of Bone And Mineral Research 2019, 35: 662-670. PMID: 31826312, PMCID: PMC7771569, DOI: 10.1002/jbmr.3938.Peer-Reviewed Original ResearchConceptsAutosomal recessive hypophosphatemic rickets type 2Biallelic mutationsMonoallelic mutationsPrimary hyperparathyroidismPathogenic variantsCarotid intima-media thicknessClassic disease manifestationsNormocalcemic primary hyperparathyroidismC-terminal FGF23Intima-media thicknessWhole-exome sequencingClinical findingsArterial calcificationPeriarticular calcificationSpectrum of phenotypesIntact FGF23Disease manifestationsBilateral femursENPP1 variantsBone deformitiesBiochemical manifestationsType 2ENPP1 geneExome sequencingHyperparathyroidism