2022
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
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 enrolment
2019
Rickets severity predicts clinical outcomes in children with X-linked hypophosphatemia: Utility of the radiographic Rickets Severity Score
Thacher TD, Pettifor JM, Tebben PJ, Creo AL, Skrinar A, Mao M, Chen CY, Chang T, San Martin J, Carpenter TO. Rickets severity predicts clinical outcomes in children with X-linked hypophosphatemia: Utility of the radiographic Rickets Severity Score. Bone 2019, 122: 76-81. PMID: 30772600, DOI: 10.1016/j.bone.2019.02.010.Peer-Reviewed Original ResearchConceptsRickets Severity ScoreSerum alkaline phosphataseSeverity scoreSevere self-reported painPediatric Outcomes Data Collection InstrumentPhase 2 clinical trialAlkaline phosphataseLess physical functionSelf-reported painSevere clinical featuresHeight z-scoreRadiographic Global ImpressionPediatric Orthopaedic SocietyIntra-rater reliabilitySubstantial inter-rater reliabilityClinical featuresClinical outcomesBilateral kneesGlobal ImpressionPhysical functionSubstantial intra-rater reliabilityWeek 64Clinical trialsBurosumab treatmentFunctional impairmentEfficacy 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
Burosumab Therapy in Children with X-Linked Hypophosphatemia
Carpenter TO, Whyte MP, Imel EA, Boot AM, Högler W, Linglart A, Padidela R, Van't Hoff W, Mao M, Chen CY, Skrinar A, Kakkis E, San Martin J, Portale AA. Burosumab Therapy in Children with X-Linked Hypophosphatemia. New England Journal Of Medicine 2018, 378: 1987-1998. PMID: 29791829, DOI: 10.1056/nejmoa1714641.Peer-Reviewed Original ResearchMeSH KeywordsAlkaline PhosphataseAntibodies, MonoclonalAntibodies, Monoclonal, HumanizedChildChild, PreschoolFamilial Hypophosphatemic RicketsFemaleFibroblast Growth Factor-23Fibroblast Growth FactorsGenetic Diseases, X-LinkedGrowthHumansKidney TubulesKnee JointMalePain ManagementPhosphorusRadiographySeverity of Illness IndexConceptsSerum phosphorus levelsRenal tubular phosphate reabsorptionTubular phosphate reabsorptionWeek 40Week 64Adverse eventsPhosphate reabsorptionNormal rangeMean serum phosphorus levelFibroblast growth factor 23End pointMean serum alkaline phosphatase levelSerum alkaline phosphatase levelsTotal scorePrimary end pointPhase 2 trialGrowth factor 23Additional end pointsPatient-reported outcomesAlkaline phosphatase levelsRadiographic Global ImpressionPhosphorus levelsOverall mean increaseBurosumab therapySubcutaneous burosumab
2016
Effect of KRN23, a fully human anti-FGF23 monoclonal antibody, on rickets in children with X-linked hypophosphatemia (XLH): 40-week interim results from a randomized, open-label phase 2 study
Linglart A, Carpenter T, Imel E, Boot A, Högler W, Padidela R, Hoff W, Whyte M, Chen C, Skrinar A, Agarwal S, San Martin J, Portale A. Effect of KRN23, a fully human anti-FGF23 monoclonal antibody, on rickets in children with X-linked hypophosphatemia (XLH): 40-week interim results from a randomized, open-label phase 2 study. Annales D Endocrinologie 2016, 77: 440. DOI: 10.1016/j.ando.2016.07.547.Peer-Reviewed Original ResearchRickets Severity ScoreAdverse eventsQ2W dosingXLH childrenSerum PiMost treatment-related adverse eventsOpen-label phase 2 studyTransient injection site reactionsTreatment-related adverse eventsPhase 2 studySerious adverse eventsInjection site reactionsSerum phosphate levelsRadiographic Global ImpressionSerum Pi concentrationSerum iPTHUrine calciumRenal ultrasoundSite reactionsCare treatmentGlobal ImpressionSeverity scoreKRN23Phosphorus homeostasisShort stature