Featured Publications
Bone marrow sinusoidal endothelial cells are a site of Fgf23 upregulation in a mouse model of iron deficiency anemia
Li X, Lozovatsky L, Tommasini S, Fretz J, Finberg K. Bone marrow sinusoidal endothelial cells are a site of Fgf23 upregulation in a mouse model of iron deficiency anemia. Blood Advances 2023, 7: 5156-5171. PMID: 37417950, PMCID: PMC10480544, DOI: 10.1182/bloodadvances.2022009524.Peer-Reviewed Original ResearchConceptsSinusoidal endothelial cellsEndothelial cellsBone marrowBM sectionsFGF23 upregulationFibroblast growth factor 23Iron deficiencyElevated serum erythropoietinFGF23 promoter activityBM endothelial cellsGrowth factor 23Vitamin D metabolismIron deficiency anemiaSystemic iron deficiencyKnockout mice exhibitBone marrow sinusoidal endothelial cellsNormal iron balanceNonanemic controlsChronic anemiaFactor 23D metabolismEndothelial cell populationErythropoietin treatmentDeficiency anemiaMouse model
2010
Altered Metabolism and Lipodystrophy in the Early B-Cell Factor 1-Deficient Mouse
Fretz JA, Nelson T, Xi Y, Adams DJ, Rosen CJ, Horowitz MC. Altered Metabolism and Lipodystrophy in the Early B-Cell Factor 1-Deficient Mouse. Endocrinology 2010, 151: 1611-1621. PMID: 20172967, PMCID: PMC2850234, DOI: 10.1210/en.2009-0987.Peer-Reviewed Original ResearchMeSH KeywordsAdiponectinAdipose TissueAnimalsBlood GlucoseBone MarrowCalorimetryCCAAT-Enhancer-Binding Protein-betaEnergy MetabolismGlucagonInsulinLeptinLipid MetabolismLipodystrophyMiceMice, KnockoutPPAR gammaReverse Transcriptase Polymerase Chain ReactionRNA, MessengerStatistics, NonparametricTrans-ActivatorsConceptsSerum glucose levelsWhite adipose tissueMarrow adiposityGlucose levelsAdipose tissueLevels of leptinBone formation rateAdipose tissue depositionNumber of osteoblastsWk of ageAltered bone morphologySerum osteocalcinInsulin levelsGlucose challengeIP injectionPancreatic hormonesLittermate controlsLipid depositionBone marrowSerum analysisBrown adiposeTissue depositionAltered metabolismMiceAdiposity
2007
Receptor Activator of Nuclear Factor-κB Ligand-Induced Nuclear Factor of Activated T Cells (C1) Autoregulates Its Own Expression in Osteoclasts and Mediates the Up-Regulation of Tartrate-Resistant Acid Phosphatase
Fretz JA, Shevde NK, Singh S, Darnay BG, Pike JW. Receptor Activator of Nuclear Factor-κB Ligand-Induced Nuclear Factor of Activated T Cells (C1) Autoregulates Its Own Expression in Osteoclasts and Mediates the Up-Regulation of Tartrate-Resistant Acid Phosphatase. Endocrinology 2007, 22: 737-750. PMID: 18063694, PMCID: PMC2262172, DOI: 10.1210/me.2007-0333.Peer-Reviewed Original ResearchMeSH KeywordsAcid PhosphataseAnimalsBlotting, WesternBone and BonesCell LineChromatin ImmunoprecipitationHomeostasisIsoenzymesMiceMice, Inbred C57BLNFATC Transcription FactorsOsteoclastsPromoter Regions, GeneticRANK LigandReverse Transcriptase Polymerase Chain ReactionRNA, MessengerTartrate-Resistant Acid PhosphataseTranscription, GeneticUp-RegulationConceptsNFAT membersRNA polymerase IIDNA-binding proteinsSpecific transcription factorsChromatin immunoprecipitation analysisSignal transduction pathwaysAdditional molecular detailsNuclear factorActivated T cells cytoplasmic 1Polymerase IIAcp5 promotersTranscription factorsTransduction pathwaysMolecular detailsTarget genesOwn expressionImmunoprecipitation analysisP1 promoterBone-resorbing cellsReceptor activatorHematopoietic precursorsGenesNuclear factor-κB ligandCytoplasmic 1Time-dependent accumulation1,25-Dihydroxyvitamin D3 induces expression of the Wnt signaling co-regulator LRP5 via regulatory elements located significantly downstream of the gene's transcriptional start site
Fretz JA, Zella LA, Kim S, Shevde NK, Pike JW. 1,25-Dihydroxyvitamin D3 induces expression of the Wnt signaling co-regulator LRP5 via regulatory elements located significantly downstream of the gene's transcriptional start site. The Journal Of Steroid Biochemistry And Molecular Biology 2007, 103: 440-445. PMID: 17229572, PMCID: PMC1868540, DOI: 10.1016/j.jsbmb.2006.11.018.Peer-Reviewed Original ResearchConceptsTranscriptional start siteGene transcriptional start siteChIP-chip analysisLRP5/LRP6Chromatin structureHuman genomeRegulatory regionsStart siteRegulatory elementsWnt familyHeterologous promoterCanonical WntMembrane receptorsMRNA transcriptsWntSecreted memberOsteoblastic cellsLRP5GenesVDRELRP5 geneBone formationProteinLrp5 locusOsteoblast number