2017
Intraperitoneal pyrophosphate treatment reduces renal calcifications in Npt2a null mice
Caballero D, Li Y, Fetene J, Ponsetto J, Chen A, Zhu C, Braddock DT, Bergwitz C. Intraperitoneal pyrophosphate treatment reduces renal calcifications in Npt2a null mice. PLOS ONE 2017, 12: e0180098. PMID: 28704395, PMCID: PMC5509111, DOI: 10.1371/journal.pone.0180098.Peer-Reviewed Original ResearchConceptsRenal calcificationCompared to WT miceElevated urinary excretionRenal stone diseaseNucleotide pyrophosphatase phosphodiesterase 1WT miceDietary calciumUrinary excretionIntraperitoneal administrationStone diseaseNull miceMouse mutationMiceCalcificationNephrocalcinosisNpt2aDisordersUnrecognized factorsContribution of genotypePresent studyPhosphodiesterase 1PPINpt2cPatientsNephrolithiasisResponse of Npt2a knockout mice to dietary calcium and phosphorus
Li Y, Caballero D, Ponsetto J, Chen A, Zhu C, Guo J, Demay M, Jüppner H, Bergwitz C. Response of Npt2a knockout mice to dietary calcium and phosphorus. PLOS ONE 2017, 12: e0176232. PMID: 28448530, PMCID: PMC5407772, DOI: 10.1371/journal.pone.0176232.Peer-Reviewed Original ResearchConceptsCompared to WT miceWT miceDietary calciumDietary phosphateCalcium x phosphorus productUrine phosphate levelsUrinary calcium excretionUrine anion gapDevelopment of novel therapiesWild-typeRenal stone diseaseWild-type miceNpt2a-knockout (KO) miceCalcium excretionFGF23 levelsNovel therapiesPreventing nephrolithiasisPlasma phosphateStone diseaseAnion gapAddition of calciumKnockout micePhosphorus productCalcium phosphate depositionHuman carriers
2012
Novel NaPi-IIc mutations causing HHRH and idiopathic hypercalciuria in several unrelated families: Long-term follow-up in one kindred
Yu Y, Sanderson SR, Reyes M, Sharma A, Dunbar N, Srivastava T, Jüppner H, Bergwitz C. Novel NaPi-IIc mutations causing HHRH and idiopathic hypercalciuria in several unrelated families: Long-term follow-up in one kindred. Bone 2012, 50: 1100-1106. PMID: 22387237, PMCID: PMC3322249, DOI: 10.1016/j.bone.2012.02.015.Peer-Reviewed Original ResearchConceptsVitamin D levelsIdiopathic hypercalciuriaKindred APTH levelsD levelsLong-term follow-upBilateral medullary nephrocalcinosisMild bone abnormalitiesSuppressed PTH levelsMutation c.Hereditary hypophosphatemic ricketsRenal phosphate-wastingRickets/osteomalaciaAssess treatment efficacyCompound heterozygous mutationsHHRH patientsKindred BKindred CSLC34A3 mutationsOral phosphateHeterozygous c.Medullary nephrocalcinosisHeterozygous mutationsNaPi-IIcHypercalciuria
2011
Hereditary hypophosphatemic rickets with hypercalciuria and nephrolithiasis—Identification of a novel SLC34A3/NaPi‐IIc mutation
Phulwani P, Bergwitz C, Jaureguiberry G, Rasoulpour M, Estrada E. Hereditary hypophosphatemic rickets with hypercalciuria and nephrolithiasis—Identification of a novel SLC34A3/NaPi‐IIc mutation. American Journal Of Medical Genetics Part A 2011, 155: 626-633. PMID: 21344632, PMCID: PMC4777326, DOI: 10.1002/ajmg.a.33832.Peer-Reviewed Original ResearchMeSH KeywordsBase SequenceChild, PreschoolFamilial Hypophosphatemic RicketsFemaleHumansHypercalciuriaInfantInfant, NewbornMaleMolecular Sequence DataMutationNephrolithiasisPedigreePolymorphism, Single NucleotidePregnancyRestriction MappingReverse Transcriptase Polymerase Chain ReactionRNA, MessengerSodium-Phosphate Cotransporter Proteins, Type IIcConceptsHereditary hypophosphatemic ricketsHypophosphatemic ricketsElevated 1,25-dihydroxyvitamin DGastrointestinal calcium absorptionHistory of nephrolithiasisIncreased gastrointestinal calcium absorptionPTH levelsRecurrent nephrolithiasisRenal ultrasoundSerum calciumCalcium absorptionNaPi-IIcPatient's motherHypercalciuriaSplicing mutationCompound heterozygosityNephrolithiasisRicketsNovel splice mutationHHRHDihydroxyvitaminPhenotypic changesMutationsMothersSplice mutation
2008
A Patient With Hypophosphatemia, a Femoral Fracture, and Recurrent Kidney Stones: Report of a Novel Mutation in SLC34A3
Page K, Bergwitz C, Jaureguiberry G, Harinarayan CV, Insogna K. A Patient With Hypophosphatemia, a Femoral Fracture, and Recurrent Kidney Stones: Report of a Novel Mutation in SLC34A3. Endocrine Practice 2008, 14: 869-874. PMID: 18996815, PMCID: PMC2773288, DOI: 10.4158/ep.14.7.869.Peer-Reviewed Original ResearchConceptsSLC34A3 geneClinical presentationNovel mutationsHistory of flank painMissense mutationsPatient's unusual clinical presentationUnusual clinical presentationPatient's clinical courseAtypical clinical presentationHereditary hypophosphatemic ricketsTreated with calcitriolRecurrent kidney stonesDisorder associated with mutationsGenomic DNA samplesStress fracturesSLC34A3 mutationsFlank painRecurrent nephrolithiasisInsufficiency fracturesClinical courseClinical improvementNaPi-IIcHypophosphatemic ricketsCompound heterozygotesGenetic analysis
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
1999
The Cadherin-Catenin System: Implications for Growth and Differentiation of Endocrine Tissues
Pötter E, Bergwitz C, Brabant G. The Cadherin-Catenin System: Implications for Growth and Differentiation of Endocrine Tissues. Endocrine Reviews 1999, 20: 207-239. PMID: 10204118, DOI: 10.1210/edrv.20.2.0362.Peer-Reviewed Reviews, Practice Guidelines, Standards, and Consensus StatementsConceptsCadherin-catenin systemBeta-catenin/TCF4 complexComplex signal transduction pathwaysCell-cell adhesionNormal cell functionSignal transduction pathwaysLoss-of-functionRegulate cellular differentiationActivation of oncogenesEpigenetic mechanismsExtracellular modulatorsTransduction pathwaysTCF4 complexPosttranscriptional eventsCellular differentiationEndocrine tissuesIntracellular signalingGenetic mouse modelsProcess of tumorigenesisCadherin-cateninsSomatic gene mutationsPreservation of tissue integrityGene silencingCell adhesionC-Myc
1995
Pseudohypoparathyroidism type Ib is not caused by mutations in the coding exons of the human parathyroid hormone (PTH)/PTH-related peptide receptor gene
Schipani E, Weinstein LS, Bergwitz C, Iida-Klein A, Kong XF, Stuhrmann M, Kruse K, Whyte MP, Murray T, Schmidtke J. Pseudohypoparathyroidism type Ib is not caused by mutations in the coding exons of the human parathyroid hormone (PTH)/PTH-related peptide receptor gene. The Journal Of Clinical Endocrinology & Metabolism 1995, 80: 1611-1621. PMID: 7745008, DOI: 10.1210/jcem.80.5.7745008.Peer-Reviewed Original ResearchConceptsPseudohypoparathyroidism type IbPHP-IbCoding exonsExon GNucleotide sequenceBase changesHuman genomic DNA clonesExon E2Receptor geneTemperature gradient gel electrophoresisGenomic DNA clonesRestriction enzyme mappingReceptor cytoplasmic tailPHP-Ib patientsPTH/PTH-related peptideReverse transcriptase-polymerase chain reactionSplice donor sitePTH/PTHrP receptor geneTranscriptase-polymerase chain reactionGradient gel electrophoresisType IbChain reactionDirect nucleotide sequencingWild-type receptorNorthern blot analysis