2024
Glis2 is an early effector of polycystin signaling and a target for therapy in polycystic kidney disease
Zhang C, Rehman M, Tian X, Pei S, Gu J, Bell T, Dong K, Tham M, Cai Y, Wei Z, Behrens F, Jetten A, Zhao H, Lek M, Somlo S. Glis2 is an early effector of polycystin signaling and a target for therapy in polycystic kidney disease. Nature Communications 2024, 15: 3698. PMID: 38693102, PMCID: PMC11063051, DOI: 10.1038/s41467-024-48025-6.Peer-Reviewed Original ResearchConceptsMouse models of autosomal dominant polycystic kidney diseaseModel of autosomal dominant polycystic kidney diseasePolycystin signalingAutosomal dominant polycystic kidney diseasePolycystin-1Polycystic kidney diseaseTreat autosomal dominant polycystic kidney diseaseGlis2Primary ciliaKidney tubule cellsSignaling pathwayMouse modelDominant polycystic kidney diseasePotential therapeutic targetTranslatomeAntisense oligonucleotidesKidney diseasePolycystinMouse kidneyFunctional effectorsCyst formationTherapeutic targetInactivationFunctional targetPharmacological targets
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 expression
2021
Interdependent Regulation of Polycystin Expression Influences Starvation-Induced Autophagy and Cell Death
Decuypere JP, Van Giel D, Janssens P, Dong K, Somlo S, Cai Y, Mekahli D, Vennekens R. Interdependent Regulation of Polycystin Expression Influences Starvation-Induced Autophagy and Cell Death. International Journal Of Molecular Sciences 2021, 22: 13511. PMID: 34948309, PMCID: PMC8706473, DOI: 10.3390/ijms222413511.Peer-Reviewed Original ResearchConceptsProximal tubular epithelial cellsAutosomal dominant polycystic kidney diseaseEarly-stage ADPKD patientsCell deathPC2 expressionDominant polycystic kidney diseaseTubular epithelial cellsRenal cell survivalPolycystin-1Polycystic kidney diseaseCell survivalPolycystin-2Basal autophagyAutophagic cell survivalCell death resistanceADPKD progressionKidney diseaseADPKD patientsLess cell deathPC1 levelsChronic starvationHealthy individualsDuct cellsEpithelial cellsDeath
2019
Polycystin 2 regulates mitochondrial Ca2+ signaling, bioenergetics, and dynamics through mitofusin 2
Kuo IY, Brill AL, Lemos FO, Jiang JY, Falcone JL, Kimmerling EP, Cai Y, Dong K, Kaplan DL, Wallace DP, Hofer AM, Ehrlich BE. Polycystin 2 regulates mitochondrial Ca2+ signaling, bioenergetics, and dynamics through mitofusin 2. Science Signaling 2019, 12 PMID: 31064883, PMCID: PMC6855602, DOI: 10.1126/scisignal.aat7397.Peer-Reviewed Original ResearchConceptsEndoplasmic reticulumPC2 knockdownMitochondrial CaCell culture modelKnockdown of Mfn2Polycystin-2 functionsHuman ADPKD kidneysAutosomal dominant polycystic kidney diseaseKey mitochondrial proteinsAberrant cell proliferationMitochondria-ER contactsCell proliferationER-mitochondrial interfaceKidney cystsIntimate functional relationshipNumerous fluid-filled cystsMitochondrial proteinsCyst-lining epithelial cellsMitofusin 2 expressionCulture modelPolycystin-2Knockdown cellsMitochondrial biogenesisMitofusin 2Mitochondrial respiration
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 trafficking
2010
Regulation of ciliary trafficking of polycystin-2 and the pathogenesis of autosomal dominant polycystic kidney disease.
Cai Y, Tang Z. Regulation of ciliary trafficking of polycystin-2 and the pathogenesis of autosomal dominant polycystic kidney disease. Journal Of Central South University Medical Sciences 2010, 35: 93-9. PMID: 20197605, DOI: 10.3969/j.issn.1672-7347.2010.02.001.Peer-Reviewed Original ResearchConceptsAutosomal dominant polycystic kidney diseasePolycystic kidney diseaseDominant polycystic kidney diseaseKidney diseasePathogenesis of ADPKDRenal epithelial cellsAccumulated evidenceEpithelial cellsKidney cystsDiseasePathogenesisPossible roleDisorder characteristicsPolycystin-1Polycystin-2Primary cilia
2009
Polycystin-1 C-terminal Cleavage Is Modulated by Polycystin-2 Expression*
Bertuccio CA, Chapin HC, Cai Y, Mistry K, Chauvet V, Somlo S, Caplan MJ. Polycystin-1 C-terminal Cleavage Is Modulated by Polycystin-2 Expression*. Journal Of Biological Chemistry 2009, 284: 21011-21026. PMID: 19491093, PMCID: PMC2742866, DOI: 10.1074/jbc.m109.017756.Peer-Reviewed Original ResearchMeSH KeywordsAmino Acid SubstitutionAmino AcidsAnimalsCalciumCell NucleusChlorocebus aethiopsCOS CellsExtracellular SpaceGenes, ReporterHumansIntracellular SpaceMiceMutant ProteinsProteasome Endopeptidase ComplexProtein Processing, Post-TranslationalProtein TransportStructure-Activity RelationshipTRPP Cation Channels
2008
Too Much of a Good Thing: Does Nek8 Link Polycystic Kidney Disease and Nephronophthisis?
Cai Y, Somlo S. Too Much of a Good Thing: Does Nek8 Link Polycystic Kidney Disease and Nephronophthisis? Journal Of The American Society Of Nephrology 2008, 19: 418-420. PMID: 18272836, DOI: 10.1681/asn.2008010084.Peer-Reviewed Original Research
2005
Polycystin-2 Regulates Proliferation and Branching Morphogenesis in Kidney Epithelial Cells*
Grimm DH, Karihaloo A, Cai Y, Somlo S, Cantley LG, Caplan MJ. Polycystin-2 Regulates Proliferation and Branching Morphogenesis in Kidney Epithelial Cells*. Journal Of Biological Chemistry 2005, 281: 137-144. PMID: 16278216, DOI: 10.1074/jbc.m507845200.Peer-Reviewed Original ResearchConceptsPolycystin-2Kidney epithelial cellsPolycystin-1Cell proliferationRegulation of tubulogenesisWild-type proteinMultiple fluid-filled cystsAutosomal dominant polycystic kidney diseaseTubule formationEpithelial cellsExtracellular-related kinaseRegulatory machineryPolycystin proteinsBranching morphogenesisNegative regulatorRespective proteinsGenes PKD1Regulates ProliferationChannel mutantsMorphogenesisFluid-filled cystsCell growthProper growthChannel activityProtein
2004
Polyductin, the PKHD1 gene product, comprises isoforms expressed in plasma membrane, primary cilium, and cytoplasm
Menezes LF, Cai Y, Nagasawa Y, Silva AM, Watkins ML, Da Silva AM, Somlo S, Guay-Woodford LM, Germino GG, Onuchic LF. Polyductin, the PKHD1 gene product, comprises isoforms expressed in plasma membrane, primary cilium, and cytoplasm. Kidney International 2004, 66: 1345-1355. PMID: 15458427, DOI: 10.1111/j.1523-1755.2004.00844.x.Peer-Reviewed Original ResearchMutations in SEC63 cause autosomal dominant polycystic liver disease
Davila S, Furu L, Gharavi AG, Tian X, Onoe T, Qian Q, Li A, Cai Y, Kamath PS, King BF, Azurmendi PJ, Tahvanainen P, Kääriäinen H, Höckerstedt K, Devuyst O, Pirson Y, Martin RS, Lifton RP, Tahvanainen E, Torres VE, Somlo S. Mutations in SEC63 cause autosomal dominant polycystic liver disease. Nature Genetics 2004, 36: 575-577. PMID: 15133510, DOI: 10.1038/ng1357.Peer-Reviewed Original ResearchThe N-terminal Extracellular Domain Is Required for Polycystin-1-dependent Channel Activity*
Babich V, Zeng WZ, Yeh BI, Ibraghimov-Beskrovnaya O, Cai Y, Somlo S, Huang CL. The N-terminal Extracellular Domain Is Required for Polycystin-1-dependent Channel Activity*. Journal Of Biological Chemistry 2004, 279: 25582-25589. PMID: 15060061, DOI: 10.1074/jbc.m402829200.Peer-Reviewed Original ResearchDeficiency of polycystin‐2 reduces Ca2+ channel activity and cell proliferation in ADPKD lymphoblastoid cells
Aguiari G, Banzi M, Gessi S, Cai Y, Zeggio E, Manzati E, Piva R, Lambertini E, Ferrari L, Peters DJ, Lanza F, Harris PC, Borea PA, Somlo S, del Senno L. Deficiency of polycystin‐2 reduces Ca2+ channel activity and cell proliferation in ADPKD lymphoblastoid cells. The FASEB Journal 2004, 18: 884-886. PMID: 15001556, DOI: 10.1096/fj.03-0687fje.Peer-Reviewed Original ResearchMeSH KeywordsAmino Acid SubstitutionB-LymphocytesCalciumCalcium SignalingCell DivisionCell Line, TransformedCodon, NonsenseEndoplasmic ReticulumGentamicinsHumansIon TransportKidneyMembrane ProteinsMutation, MissenseOrgan SpecificityPlatelet Activating FactorPoint MutationPolycystic Kidney, Autosomal DominantProteinsRNA, MessengerSuppression, GeneticTRPP Cation ChannelsConceptsPlatelet-activating factorAutosomal dominant polycystic kidney disease patientsPolycystic kidney disease patientsKidney disease patientsCell proliferationPolycystin-2B lymphoblastoid cellsDisease patientsADPKD patientsB-LCLIntracellular Ca2PKD2 mutationsPC2 levelsKidney epitheliumPatientsChannel activityLymphoblastoid cellsAminoglycoside antibioticsKidney cellsImportant regulatorHEK293 cellsPKD2 geneFunction activityCa2PKD genes
2002
Expression of PKD1 and PKD2 Transcripts and Proteins in Human Embryo and during Normal Kidney Development
Chauvet V, Qian F, Boute N, Cai Y, Phakdeekitacharoen B, Onuchic LF, Attié-Bitach T, Guicharnaud L, Devuyst O, Germino GG, Gubler MC. Expression of PKD1 and PKD2 Transcripts and Proteins in Human Embryo and during Normal Kidney Development. American Journal Of Pathology 2002, 160: 973-983. PMID: 11891195, PMCID: PMC1867156, DOI: 10.1016/s0002-9440(10)64919-x.Peer-Reviewed Original ResearchConceptsPolycystin-1Kidney developmentPolycystin-2Expression patternsPKD1 expressionHuman genetic disordersLarge transmembrane proteinCell-matrix interactionsNormal kidney developmentMutations of PKD1Expression of PKD1Northern blot analysisGenes decreasesTransmembrane proteinHuman embryogenesisEndodermal derivativesSpatiotemporal expressionUreteric budPKD1 transcriptPKD2Transmembrane glycoproteinTranscriptsPKD1Nephron developmentProteinPolycystin-2 is an intracellular calcium release channel
Koulen P, Cai Y, Geng L, Maeda Y, Nishimura S, Witzgall R, Ehrlich BE, Somlo S. Polycystin-2 is an intracellular calcium release channel. Nature Cell Biology 2002, 4: 191-197. PMID: 11854751, DOI: 10.1038/ncb754.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsCalcium ChannelsCalcium SignalingEndoplasmic ReticulumHumansIn Vitro TechniquesKidneyLLC-PK1 CellsMembrane PotentialsMembrane ProteinsMiceMice, Inbred C57BLMutationMutation, MissensePolycystic Kidney, Autosomal DominantRecombinant ProteinsSequence DeletionSignal TransductionSwineTRPP Cation ChannelsConceptsAutosomal dominant polycystic kidney diseaseIntracellular calcium release channelsPolycystic kidney diseaseCalcium release channelKidney diseaseTransient receptor potential channelsIntracellular calcium releaseDominant polycystic kidney diseaseRelease channelCalcium release signalsPolycystin-2 functionsType 2 autosomal dominant polycystic kidney diseaseCalcium releasePolycystin-2Single-channel studiesEpithelial cellsPotential channelsDiseaseMissense mutationsRelease signalsCarboxy-terminal truncationDisease-causing missense mutations
2000
Cloning and Characterization of the Murine Pkd2 Promoter
Park J, Li L, Cai Y, Hayashi T, Dong F, Maeda Y, Rubin C, Somlo S, Wu G. Cloning and Characterization of the Murine Pkd2 Promoter. Genomics 2000, 66: 305-312. PMID: 10873385, DOI: 10.1006/geno.2000.6197.Peer-Reviewed Original ResearchAnimalsBase SequenceCell LineCloning, MolecularCodon, InitiatorExonsGene Expression RegulationHumansIntronsMembrane ProteinsMiceMutagenesis, Site-DirectedPolycystic Kidney, Autosomal DominantPromoter Regions, GeneticSequence DeletionSequence Homology, Nucleic AcidTranscription, GeneticTransfectionTRPP Cation Channels
1999
The rat Pkd2 protein assumes distinct subcellular distributions in different organs
Obermüller N, Gallagher A, Cai Y, Gassler N, Gretz N, Somlo S, Witzgall R. The rat Pkd2 protein assumes distinct subcellular distributions in different organs. American Journal Of Physiology 1999, 277: f914-f925. PMID: 10600939, DOI: 10.1152/ajprenal.1999.277.6.f914.Peer-Reviewed Original ResearchConceptsPKD2 proteinDifferent cellular compartmentsDistinct subcellular distributionCellular compartmentsBasolateral distributionExpression patternsCytoplasmic locationSubcellular distributionPKD2 geneWidespread expressionCellular distributionAdrenal glandProteinSmooth muscle cellsSalivary glandsMuscle cellsPKD2Autosomal dominant polycystic kidney diseasePolycystic kidney diseaseDifferent organsRenal distal tubulesMutationsIndividual organsDifferent rat organsPKD2 mutationsAberrant splicing in the PKD2 gene as a cause of polycystic kidney disease.
Reynolds DM, Hayashi T, Cai Y, Veldhuisen B, Watnick TJ, Lens XM, Mochizuki T, Qian F, Maeda Y, Li L, Fossdal R, Coto E, Wu G, Breuning MH, Germino GG, Peters DJ, Somlo S. Aberrant splicing in the PKD2 gene as a cause of polycystic kidney disease. Journal Of The American Society Of Nephrology 1999, 10: 2342-51. PMID: 10541293, DOI: 10.1681/asn.v10112342.Peer-Reviewed Original ResearchConceptsPolycystin-2Mutant polycystin-2Future functional studiesNovel intragenic polymorphismsFrame splice variantsMissense variantsSingle base substitution mutationsPolycystin-2 proteinCryptic splice siteAutosomal dominant polycystic kidney diseaseBase substitution mutationsTransmembrane spansSingle base substitutionPolycystic kidney diseaseSplicing signalsSubunit functionAberrant splicingLymphoblast RNAMutant chromosomesSplice siteSubstitution mutationsPKD2 geneThird mutationBase substitutionsSplice variantsIdentification and Characterization of Polycystin-2, thePKD2 Gene Product*
Cai Y, Maeda Y, Cedzich A, Torres V, Wu G, Hayashi T, Mochizuki T, Park J, Witzgall R, Somlo S. Identification and Characterization of Polycystin-2, thePKD2 Gene Product*. Journal Of Biological Chemistry 1999, 274: 28557-28565. PMID: 10497221, DOI: 10.1074/jbc.274.40.28557.Peer-Reviewed Original ResearchConceptsEndoplasmic reticulum localizationPolycystin-2Gene productsPutative phosphorylation sitesProtein binding partnersProtein disulfide isomerasePKD2 gene productImmunofluorescent cell stainingIntegral membrane glycoproteinSubcellular fractionation studiesAutosomal dominant polycystic kidney diseaseEndo H resistanceGolgi proteinsPhosphorylation sitesSecond geneBinding partnerTruncation mutantsTranslation productsPlasma membraneHigh-mannose oligosaccharidesAcid regionEndoplasmic reticulumIntact cellsH resistanceMembrane glycoproteinsMutations in autosomal dominant polycystic kidney disease 2 gene: Reduced expression of PKD2 protein in lymphoblastoid cells
Aguiari G, Manzati E, Penolazzi L, Micheletti F, Augello G, De Vitali E, Cappelli G, Cai Y, Reynolds D, Somlo S, Piva R, del Senno L. Mutations in autosomal dominant polycystic kidney disease 2 gene: Reduced expression of PKD2 protein in lymphoblastoid cells. American Journal Of Kidney Diseases 1999, 33: 880-885. PMID: 10213643, DOI: 10.1016/s0272-6386(99)70420-8.Peer-Reviewed Original ResearchConceptsPolycystic kidney disease 2 (PKD2) geneMembrane-spanning domainsIntegral membrane proteinsLymphoblastoid cellsFirst extracellular loopAutosomal dominant polycystic kidney diseasePKD2 proteinMembrane proteinsRestriction enzyme analysisCommon genetic diseaseLymphoblastoid cell linesProtein productsMutant allelesExtracellular loopWestern blot analysisPKD2 genePolymerase chain reactionGenetic diseasesNormal proteinAmino acidsMessenger RNA levelsNonsense mutationFrameshift mutationGenesProtein