2023
TRAPPC6B biallelic variants cause a neurodevelopmental disorder with TRAPP II and trafficking disruptions
Almousa H, Lewis S, Bakhtiari S, Nordlie S, Pagnozzi A, Magee H, Efthymiou S, Heim J, Cornejo P, Zaki M, Anwar N, Maqbool S, Rahman F, Neilson D, Vemuri A, Jin S, Yang X, Heidari A, van Gassen K, Trimouille A, Thauvin-Robinet C, Liu J, Bruel A, Tomoum H, Shata M, Hashem M, Toosi M, Karimiani E, Yeşil G, Lingappa L, Baruah D, Ebrahimzadeh F, Van-Gils J, Faivre L, Zamani M, Galehdari H, Sadeghian S, Shariati G, Mohammad R, van der Smagt J, Qari A, Vincent J, Innes A, Dursun A, Özgül R, Akar H, Bilguvar K, Mignot C, Keren B, Raveli C, Burglen L, Afenjar A, Kaat L, van Slegtenhorst M, Alkuraya F, Houlden H, Padilla-Lopez S, Maroofian R, Sacher M, Kruer M. TRAPPC6B biallelic variants cause a neurodevelopmental disorder with TRAPP II and trafficking disruptions. Brain 2023, 147: 311-324. PMID: 37713627, PMCID: PMC10766242, DOI: 10.1093/brain/awad301.Peer-Reviewed Original Research
2022
Biallelic BICD2 variant is a novel candidate for Cohen-like syndrome
Caglayan AO, Tuysuz B, Gül E, Alkaya DU, Yalcinkaya C, Gleeson JG, Bilguvar K, Gunel M. Biallelic BICD2 variant is a novel candidate for Cohen-like syndrome. Journal Of Human Genetics 2022, 67: 553-556. PMID: 35338243, PMCID: PMC9420744, DOI: 10.1038/s10038-022-01032-1.Peer-Reviewed Original ResearchMeSH KeywordsGenes, DominantHumansIntellectual DisabilityMicrotubule-Associated ProteinsMuscular Atrophy, SpinalMutationMutation, MissenseConceptsWhole-exome sequencing analysisTruncal obesityJoint hypermobilityLower extremitiesHomozygous missense mutationSevere formBICD2 mutationsType 2BHeterozygous mutationsSpeech delayType 2AIntellectual disabilityPatientsSyndromeConsanguineous unionsMissense mutationsNovel candidatesSequencing analysisFirst reportMutations
2021
Bi-allelic variants in SPATA5L1 lead to intellectual disability, spastic-dystonic cerebral palsy, epilepsy, and hearing loss
Richard EM, Bakhtiari S, Marsh APL, Kaiyrzhanov R, Wagner M, Shetty S, Pagnozzi A, Nordlie SM, Guida BS, Cornejo P, Magee H, Liu J, Norton BY, Webster RI, Worgan L, Hakonarson H, Li J, Guo Y, Jain M, Blesson A, Rodan LH, Abbott MA, Comi A, Cohen JS, Alhaddad B, Meitinger T, Lenz D, Ziegler A, Kotzaeridou U, Brunet T, Chassevent A, Smith-Hicks C, Ekstein J, Weiden T, Hahn A, Zharkinbekova N, Turnpenny P, Tucci A, Yelton M, Horvath R, Gungor S, Hiz S, Oktay Y, Lochmuller H, Zollino M, Morleo M, Marangi G, Nigro V, Torella A, Pinelli M, Amenta S, Husain RA, Grossmann B, Rapp M, Steen C, Marquardt I, Grimmel M, Grasshoff U, Korenke GC, Owczarek-Lipska M, Neidhardt J, Radio FC, Mancini C, Claps Sepulveda DJ, McWalter K, Begtrup A, Crunk A, Guillen Sacoto MJ, Person R, Schnur RE, Mancardi MM, Kreuder F, Striano P, Zara F, Chung WK, Marks WA, van Eyk CL, Webber DL, Corbett MA, Harper K, Berry JG, MacLennan AH, Gecz J, Tartaglia M, Salpietro V, Christodoulou J, Kaslin J, Padilla-Lopez S, Bilguvar K, Munchau A, Ahmed ZM, Hufnagel RB, Fahey MC, Maroofian R, Houlden H, Sticht H, Mane SM, Rad A, Vona B, Jin SC, Haack TB, Makowski C, Hirsch Y, Riazuddin S, Kruer MC. Bi-allelic variants in SPATA5L1 lead to intellectual disability, spastic-dystonic cerebral palsy, epilepsy, and hearing loss. American Journal Of Human Genetics 2021, 108: 2006-2016. PMID: 34626583, PMCID: PMC8546233, DOI: 10.1016/j.ajhg.2021.08.003.Peer-Reviewed Original ResearchConceptsSensorineural hearing lossCerebral palsyHearing lossBi-allelic variantsInner earRodent inner earDevelopmental delay/intellectual disabilityThin corpus callosumGlial cell nucleiIntellectual disabilityRat hippocampal neuronsWhite matter volumeNeurosensory hair cellsPeriventricular leukomalaciaQuantitative volumetryCerebral volumeCorpus callosumHippocampal neuronsMatter volumeReceptor functionBrain imagingHair cellsProminent expressionNeurodevelopmental phenotypesAffected individualsALG13 X‐linked intellectual disability: New variants, glycosylation analysis, and expanded phenotypes
Alsharhan H, He M, Edmondson AC, Daniel EJP, Chen J, Donald T, Bakhtiari S, Amor DJ, Jones EA, Vassallo G, Vincent M, Cogné B, Deb W, Werners AH, Jin SC, Bilguvar K, Christodoulou J, Webster RI, Yearwood KR, Ng BG, Freeze HH, Kruer MC, Li D, Raymond KM, Bhoj EJ, Sobering AK. ALG13 X‐linked intellectual disability: New variants, glycosylation analysis, and expanded phenotypes. Journal Of Inherited Metabolic Disease 2021, 44: 1001-1012. PMID: 33734437, PMCID: PMC8720508, DOI: 10.1002/jimd.12378.Peer-Reviewed Original ResearchMeSH KeywordsCongenital Disorders of GlycosylationFemaleGenetic VariationGlycosylationHumansIntellectual DisabilityMaleN-AcetylglucosaminyltransferasesPhenotypeTransferrinConceptsTransferrin glycosylationProtein glycosylationPathogenic variantsN-glycansGlycosylation analysisGlycosylationVariable clinical phenotypeALG13Novel variantsPlasma glycansPhenotypeCongenital disorderIonization quadrupole timeVariantsUnderlying mechanismClinical phenotypeIntellectual disabilityNovo c.Unreported subjectsInfantile spasmsEpileptic encephalopathyClinical dataGlycansMale subjectsNeurodevelopmental course
2020
Alternative genomic diagnoses for individuals with a clinical diagnosis of Dubowitz syndrome
Dyment DA, O'Donnell‐Luria A, Agrawal PB, Akdemir Z, Aleck KA, Antaki D, Al Sharhan H, Au P, Aydin H, Beggs AH, Bilguvar K, Boerwinkle E, Brand H, Brownstein CA, Buyske S, Chodirker B, Choi J, Chudley AE, Clericuzio CL, Cox GF, Curry C, de Boer E, de Vries B, Dunn K, Dutmer CM, England EM, Fahrner JA, Geckinli BB, Genetti CA, Gezdirici A, Gibson WT, Gleeson JG, Greenberg CR, Hall A, Hamosh A, Hartley T, Jhangiani SN, Karaca E, Kernohan K, Lauzon JL, Lewis MES, Lowry RB, López‐Giráldez F, Matise TC, McEvoy‐Venneri J, McInnes B, Mhanni A, Minaur S, Moilanen J, Nguyen A, Nowaczyk MJM, Posey JE, Õunap K, Pehlivan D, Pajusalu S, Penney LS, Poterba T, Prontera P, Doriqui MJR, Sawyer SL, Sobreira N, Stanley V, Torun D, Wargowski D, Witmer PD, Wong I, Xing J, Zaki MS, Zhang Y, Consortium C, Genomics C, Boycott KM, Bamshad MJ, Nickerson DA, Blue EE, Innes AM. Alternative genomic diagnoses for individuals with a clinical diagnosis of Dubowitz syndrome. American Journal Of Medical Genetics Part A 2020, 185: 119-133. PMID: 33098347, PMCID: PMC8197629, DOI: 10.1002/ajmg.a.61926.Peer-Reviewed Original ResearchConceptsGenome sequencingExtensive locus heterogeneityCopy number variationsGenomic analysisMolecular diagnosisSingle geneDe novo variantsNext-generation sequencingDisease genesWide sequencingGenesGenomic diagnosisLocus heterogeneityNovo variantsSequencingPhenotypeAdditional familiesBiallelic variantsHDAC8FamilyVariant filteringDistinctive facial appearanceClinical phenotypeVariantsUncertain significanceA patient with mental retardation, enteropathy, deafness, peripheral neuropathy, ichthyosis, keratodermia syndrome caused by AP1B1 gene variant.
Meriç R, Ercan-Sencicek AG, Uludağ Alkaya D, Şahin Y, Sar M, Bilguvar K, Tüysüz B. A patient with mental retardation, enteropathy, deafness, peripheral neuropathy, ichthyosis, keratodermia syndrome caused by AP1B1 gene variant. Clinical Dysmorphology 2020, 30: 54-57. PMID: 32969855, DOI: 10.1097/mcd.0000000000000350.Peer-Reviewed Case Reports and Technical NotesMETAP1 mutation is a novel candidate for autosomal recessive intellectual disability
Caglayan AO, Aktar F, Bilguvar K, Baranoski JF, Akgumus GT, Harmanci AS, Erson-Omay EZ, Yasuno K, Caksen H, Gunel M. METAP1 mutation is a novel candidate for autosomal recessive intellectual disability. Journal Of Human Genetics 2020, 66: 215-218. PMID: 32764695, PMCID: PMC7785574, DOI: 10.1038/s10038-020-0820-0.Peer-Reviewed Original ResearchMeSH KeywordsAdolescentAminopeptidasesChildExome SequencingFemaleGenes, RecessiveHumansIntellectual DisabilityMaleMutationPedigreeSiblingsConceptsEssential proteinsAutosomal recessive intellectual disabilityRecessive intellectual disabilityMethionine aminopeptidase 1Genomic analysisHomozygous nonsense mutationFunction mutationsNovel homozygous nonsense mutationNonsense mutationAminopeptidase 1Novel candidatesNeuronal functionMutationsMolecular pathogenesisProteinIntellectual disabilityGenome testingEukaryotesNovel etiologyMetAP1GenesNeurologic impairmentCommon diseasePathwayCells
2014
NGLY1 mutation causes neuromotor impairment, intellectual disability, and neuropathy
Caglayan AO, Comu S, Baranoski JF, Parman Y, Kaymakçalan H, Akgumus GT, Caglar C, Dolen D, Erson-Omay EZ, Harmanci AS, Mishra-Gorur K, Freeze HH, Yasuno K, Bilguvar K, Gunel M. NGLY1 mutation causes neuromotor impairment, intellectual disability, and neuropathy. European Journal Of Medical Genetics 2014, 58: 39-43. PMID: 25220016, PMCID: PMC4804755, DOI: 10.1016/j.ejmg.2014.08.008.Peer-Reviewed Original ResearchConceptsN-glycanase 1Proteasome-mediated degradationConserved enzymeFrame-shift mutationApparent intellectual disabilityBase pair deletionNeuromotor impairmentNovel homozygous frame-shift mutationHomozygous frame-shift mutationNeuronal cellsPair deletionAmyotrophic lateral sclerosisIntellectual disabilityMutationsProteinNeurological functionCorneal opacityNeurologic diseaseLateral sclerosisParkinson's diseaseProgressive lossDiseaseCytoplasmImpairmentDeletion
2012
Missense mutation in the ATPase, aminophospholipid transporter protein ATP8A2 is associated with cerebellar atrophy and quadrupedal locomotion
Emre Onat O, Gulsuner S, Bilguvar K, Nazli Basak A, Topaloglu H, Tan M, Tan U, Gunel M, Ozcelik T. Missense mutation in the ATPase, aminophospholipid transporter protein ATP8A2 is associated with cerebellar atrophy and quadrupedal locomotion. European Journal Of Human Genetics 2012, 21: 281-285. PMID: 22892528, PMCID: PMC3573203, DOI: 10.1038/ejhg.2012.170.Peer-Reviewed Original ResearchConceptsC-terminal transmembrane regionATPase domainNext-generation sequencingTransmembrane regionHomozygous regionsHomozygosity mappingAffected individualsATP8A2Novel missense variantChromosome 13q12Missense mutationsATP8A2 geneSegregation analysisConsanguineous familyMissense variantsUnrelated individualsMutationsMental retardationQuadrupedal locomotionGenesDysequilibrium syndromeSequencingTranslocationATPaseNovo
2011
Rare Copy Number Variants in Tourette Syndrome Disrupt Genes in Histaminergic Pathways and Overlap with Autism
Fernandez TV, Sanders SJ, Yurkiewicz IR, Ercan-Sencicek AG, Kim YS, Fishman DO, Raubeson MJ, Song Y, Yasuno K, Ho WS, Bilguvar K, Glessner J, Chu SH, Leckman JF, King RA, Gilbert DL, Heiman GA, Tischfield JA, Hoekstra PJ, Devlin B, Hakonarson H, Mane SM, Günel M, State MW. Rare Copy Number Variants in Tourette Syndrome Disrupt Genes in Histaminergic Pathways and Overlap with Autism. Biological Psychiatry 2011, 71: 392-402. PMID: 22169095, PMCID: PMC3282144, DOI: 10.1016/j.biopsych.2011.09.034.Peer-Reviewed Original ResearchConceptsCopy number variationsRare copy number variationsNovel risk regionsEnrichment of genesGamma-aminobutyric acid receptor genesNervous system developmentEtiology of TSParent-child triosRare copy number variantsCopy number variantsGene mappingPathway analysisDe novo eventsAxon guidanceCell adhesionMolecular pathwaysNumber variationsRelevant pathwaysCNV analysisNumber variantsGenesReceptor geneDe novoNovo eventsPathway
2009
The syndrome of pachygyria, mental retardation, and arachnoid cysts maps to 11p15
Bilguvar K, Ozturk AK, Bayrakli F, Guzel A, DiLuna ML, Bayri Y, Tatli M, Tekes S, Arlier Z, Yasuno K, Mason CE, Lifton RP, State MW, Gunel M. The syndrome of pachygyria, mental retardation, and arachnoid cysts maps to 11p15. American Journal Of Medical Genetics Part A 2009, 149A: 2569-2572. PMID: 19876906, DOI: 10.1002/ajmg.a.33063.Peer-Reviewed Original ResearchAbnormalities, MultipleArachnoid CystsBlood Specimen CollectionChromosome MappingChromosomes, Human, Pair 11DNADNA Copy Number VariationsFamilyFemaleGenome, HumanGenome-Wide Association StudyGenotypeHomozygoteHumansIntellectual DisabilityLissencephalyLod ScoreMalePedigreePhenotypePolymorphism, Single NucleotideSyndrome
2007
Apparently novel genetic syndrome of pachygyria, mental retardation, seizure, and arachnoid cysts
Guzel A, Tatli M, Bilguvar K, DiLuna ML, Bakkaloglu B, Ozturk AK, Bayrakli F, Gunel M. Apparently novel genetic syndrome of pachygyria, mental retardation, seizure, and arachnoid cysts. American Journal Of Medical Genetics Part A 2007, 143A: 672-677. PMID: 17343267, DOI: 10.1002/ajmg.a.31640.Peer-Reviewed Original ResearchMeSH KeywordsArachnoid CystsEpilepsyFemaleHumansIntellectual DisabilityMalePedigreeSyndromeTelencephalonConceptsArachnoid cystCerebral anomaliesMental retardationAutosomal recessive inheritanceSeizure disorderNovel genetic syndromeCentrum semiovaleLack of mutationsPerivascular spacesWhite matterNew syndromeGenetic syndromesLissencephaly geneSyndromeCystsRecessive inheritancePachygyriaSeizuresConsanguineous familyRetardationNew phenotypesPatients