2022
XBP1 Activation Reduces Severity of Polycystic Kidney Disease due to a Nontruncating Polycystin-1 Mutation in Mice
Krappitz M, Bhardwaj R, Dong K, Staudner T, Yilmaz DE, Pioppini C, Westergerling P, Ruemmele D, Hollmann T, Nguyen TA, Cai Y, Gallagher AR, Somlo S, Fedeles S. XBP1 Activation Reduces Severity of Polycystic Kidney Disease due to a Nontruncating Polycystin-1 Mutation in Mice. Journal Of The American Society Of Nephrology 2022, 34: 110-121. PMID: 36270750, PMCID: PMC10101557, DOI: 10.1681/asn.2021091180.Peer-Reviewed Original ResearchConceptsPolycystin-1Polycystin-2Functional polycystin-1Amino acid substitution mutationsAutosomal dominant polycystic kidney diseaseIntegral membrane proteinsTranscription factor XBP1Unfolded protein responsePost-translational maturationAcid substitution mutationsEndoplasmic reticulum chaperoneCiliary traffickingXBP1 activityChaperone functionIntegral membraneActive XBP1Polycystic kidney diseaseMembrane proteinsPC1 functionsPrimary ciliaProtein responseHypomorphic mutationsTransgenic activationSubstitution mutationsTransgenic expressionDrug Development for Cystic Kidney Diseases
Fedeles S, Perrone RD. Drug Development for Cystic Kidney Diseases. Clinical Journal Of The American Society Of Nephrology 2022, 17: 1549-1550. PMID: 35998972, PMCID: PMC9528273, DOI: 10.2215/cjn.04910422.Peer-Reviewed Original Research
2017
Isolated polycystic liver disease genes define effectors of polycystin-1 function
Besse W, Dong K, Choi J, Punia S, Fedeles SV, Choi M, Gallagher AR, Huang EB, Gulati A, Knight J, Mane S, Tahvanainen E, Tahvanainen P, Sanna-Cherchi S, Lifton RP, Watnick T, Pei YP, Torres VE, Somlo S. Isolated polycystic liver disease genes define effectors of polycystin-1 function. Journal Of Clinical Investigation 2017, 127: 1772-1785. PMID: 28375157, PMCID: PMC5409105, DOI: 10.1172/jci90129.Peer-Reviewed Original ResearchMeSH KeywordsAdultAnimalsCalcium-Binding ProteinsCell Line, TransformedCystsEndoplasmic ReticulumFemaleGenome-Wide Association StudyGlucosidasesGlucosyltransferasesHeterozygoteHumansIntracellular Signaling Peptides and ProteinsLiver DiseasesMaleMembrane ProteinsMiceMolecular ChaperonesMutationRNA-Binding ProteinsSEC Translocation ChannelsTRPP Cation ChannelsConceptsPolycystin-1 functionPolycystin-1Protein biogenesis pathwaysGenome-wide basisPolycystic liver diseaseLoss-of-function mutationsWhole-exome sequencingHeterozygous loss-of-function mutationsBiogenesis pathwayLoss of functionAdditional genesDisease genesGene productsCell line modelsCandidate genesExome sequencingEndoplasmic reticulumCausative genesFunction mutationsGenesAutosomal dominant polycystic kidney diseaseDominant polycystic kidney diseaseSec63Defective maturationKidney cysts
2016
Is it Time to Fold the Cysts Away?
Krappitz M, Gallagher AR, Fedeles S. Is it Time to Fold the Cysts Away? Trends In Molecular Medicine 2016, 22: 997-999. PMID: 27793600, DOI: 10.1016/j.molmed.2016.10.001.Peer-Reviewed Original Research
2015
Hepatocystin is Essential for TRPM7 Function During Early Embryogenesis
Overton JD, Komiya Y, Mezzacappa C, Nama K, Cai N, Lou L, Fedeles SV, Habas R, Runnels LW. Hepatocystin is Essential for TRPM7 Function During Early Embryogenesis. Scientific Reports 2015, 5: 18395. PMID: 26671672, PMCID: PMC4680877, DOI: 10.1038/srep18395.Peer-Reviewed Original ResearchConceptsXenopus laevis embryosEmbryonic lethalityTRPM7 functionLaevis embryosProtein kinase C substrate 80KEarly embryonic lethalityNoncatalytic beta subunitXenopus laevis embryogenesisEmbryonic day E11.5TRPM7 ion channelVertebrate gastrulationGastrulation defectsResident enzymesEarly embryogenesisPolycystin-2TRPM7 protein expressionDay E11.5KDa proteinGlucosidase IIEndoplasmic reticulumBeta subunitOverexpression of TRPM7Second alleleSomatic lossIon channels
2014
Altered trafficking and stability of polycystins underlie polycystic kidney disease
Cai Y, Fedeles SV, Dong K, Anyatonwu G, Onoe T, Mitobe M, Gao JD, Okuhara D, Tian X, Gallagher AR, Tang Z, Xie X, Lalioti MD, Lee AH, Ehrlich BE, Somlo S. Altered trafficking and stability of polycystins underlie polycystic kidney disease. Journal Of Clinical Investigation 2014, 124: 5129-5144. PMID: 25365220, PMCID: PMC4348948, DOI: 10.1172/jci67273.Peer-Reviewed Original ResearchConceptsG-protein-coupled receptor proteolytic sitePolycystic kidney diseaseKidney diseaseGPS cleavageAutosomal dominant polycystic kidney diseaseMissense mutationsDominant polycystic kidney diseasePolycystin-1Polycystin-2Murine modelSevere formPathogenic missense mutationsPKD1 mutationsCOOH-terminal fragmentDiseaseMissense variantsExpression levelsFunctional assaysCell-based systemsAltered traffickingN-Glycosylation Determines the Abundance of the Transient Receptor Potential Channel TRPP2*
Hofherr A, Wagner C, Fedeles S, Somlo S, Köttgen M. N-Glycosylation Determines the Abundance of the Transient Receptor Potential Channel TRPP2*. Journal Of Biological Chemistry 2014, 289: 14854-14867. PMID: 24719335, PMCID: PMC4031537, DOI: 10.1074/jbc.m114.562264.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsAsparagineBinding SitesBlotting, WesternCell LineCells, CulturedGlucosidasesGlycosylationHEK293 CellsHeLa CellsHumansIntracellular Signaling Peptides and ProteinsLysosomesMass SpectrometryMiceMice, KnockoutMicroscopy, FluorescenceMutationPolycystic Kidney, Autosomal DominantProtein Serine-Threonine KinasesProteolysisPyruvate Dehydrogenase Acetyl-Transferring KinaseConceptsGlucosidase IINon-catalytic β-subunitsProtein expressionFirst extracellular loopAutosomal dominant polycystic liver diseaseEfficient biogenesisGenetic interactionsMembrane proteinsBiochemical approachesN-glycosylationGenetic approachesTRPP2Glycosylation sitesBiological roleLysosomal degradationΒ-subunitChemical inhibitionBiogenesisExtracellular loopNonselective cation channelsIon channelsBiological importanceGlycosylationCation channelsProtein levelsSteviol retards renal cyst growth through reduction of CFTR expression and inhibition of epithelial cell proliferation in a mouse model of polycystic kidney disease
Yuajit C, Muanprasat C, Gallagher AR, Fedeles SV, Kittayaruksakul S, Homvisasevongsa S, Somlo S, Chatsudthipong V. Steviol retards renal cyst growth through reduction of CFTR expression and inhibition of epithelial cell proliferation in a mouse model of polycystic kidney disease. Biochemical Pharmacology 2014, 88: 412-421. PMID: 24518257, DOI: 10.1016/j.bcp.2014.01.038.Peer-Reviewed Original ResearchConceptsAutosomal dominant polycystic kidney diseasePolycystic kidney diseaseRenal cyst growthCyst-lining epithelial cellsMouse modelKidney diseaseEpithelial cell proliferationEffect of steviolCyst enlargementCyst growthCell proliferationEpithelial cellsBlood urea nitrogenHuman autosomal dominant polycystic kidney diseaseDominant polycystic kidney diseaseOrthologous mouse modelChloride channel expressionRenal epithelial cell proliferationTransepithelial fluid secretionADPKD mouse modelRenal failureKidney functionKidney weightDaily treatmentCreatinine valuesPolycystin-1: a master regulator of intersecting cystic pathways
Fedeles SV, Gallagher AR, Somlo S. Polycystin-1: a master regulator of intersecting cystic pathways. Trends In Molecular Medicine 2014, 20: 251-260. PMID: 24491980, PMCID: PMC4008641, DOI: 10.1016/j.molmed.2014.01.004.Peer-Reviewed Original ResearchConceptsAutosomal dominant polycystic kidney diseaseAutosomal recessive polycystic kidney diseaseAutosomal dominant polycystic liver diseasePolycystic kidney diseaseKidney diseasePolycystic liver diseaseRecessive polycystic kidney diseaseDominant polycystic kidney diseaseLiver diseasePolycystic diseaseCyst growthLethal monogenic disorderCyst formationTranslational implicationsDiseaseMonogenic disordersCausative genesCystic phenotypeRecent dataPolycystin-1Polycystin-2Master regulator
2012
Cell polarity and cystic kidney disease
Fedeles S, Gallagher AR. Cell polarity and cystic kidney disease. Pediatric Nephrology 2012, 28: 1161-1172. PMID: 23161205, DOI: 10.1007/s00467-012-2337-z.Peer-Reviewed Original ResearchConceptsPlanar cell polarityCell polarityApical-basolateral polarityEpithelial cell polarityConserved Protein ComplexesCystic kidney diseasePolarity mechanismsProtein complexesOrgan developmentIntriguing crosstalkMolecular processesRecent findingsPolycystic kidney diseasePolarityInteresting questionsCrosstalkComplexesMaintenanceDifferent effects of Sec61α, Sec62 and Sec63 depletion on transport of polypeptides into the endoplasmic reticulum of mammalian cells
Lang S, Benedix J, Fedeles SV, Schorr S, Schirra C, Schäuble N, Jalal C, Greiner M, Haßdenteufel S, Tatzelt J, Kreutzer B, Edelmann L, Krause E, Rettig J, Somlo S, Zimmermann R, Dudek J. Different effects of Sec61α, Sec62 and Sec63 depletion on transport of polypeptides into the endoplasmic reticulum of mammalian cells. Journal Of Cell Science 2012, 125: 1958-1969. PMID: 22375059, PMCID: PMC4074215, DOI: 10.1242/jcs.096727.Peer-Reviewed Original ResearchConceptsPost-translational transportTail-anchored proteinsSEC61A1 geneEndoplasmic reticulumTransport of polypeptidesCo-translational transportSemi-permeabilized cellsPrecursor proteinSEC62 geneSec61 channelPresecretory proteinsMembrane integrationProtein transportMammalian cellsKnockdown approachHuman cellsGenesHeLa cellsProteinPolypeptideReticulumCellsSec63pSec61αSec63