2024
Novel PIBF1 Pathogenic Variant in Three Siblings with Joubert Syndrome Type 33
Aynekin B, Samur B, Ozgul Gumus U, Bilguvar K, Gulec A, Efthymiou S, Gumus H, Caglayan A, Per H. Novel PIBF1 Pathogenic Variant in Three Siblings with Joubert Syndrome Type 33. Molecular Syndromology 2024, 1-14. DOI: 10.1159/000543107.Peer-Reviewed Original ResearchMolar tooth signRare autosomal recessive disorderOptic nerve atrophySevere renal diseaseAutosomal recessive disorderHomozygous nonsense mutationWhole-exome sequencingNerve atrophyRenal atrophyDisease-causing genesClinical spectrumClinical featuresDysmorphic featuresClinical manifestationsPhenotypic expansionDiagnostic awarenessHomozygous mutationJoubert syndromePathogenic variantsPatient's seizuresRecessive disorderRenal diseaseNonsense mutationDevelopmental delayKidney failure
2021
D‐bifunctional protein deficiency caused by splicing variants in a neonate with severe peroxisomal dysfunction and persistent hypoglycemia
Werner KM, Cox AJ, Qian E, Jain P, Ji W, Tikhonova I, Castaldi C, Bilguvar K, Knight J, Ferdinandusse S, Fawaz R, Jiang Y, Gallagher PG, Bizzarro M, Gruen JR, Bale A, Zhang H. D‐bifunctional protein deficiency caused by splicing variants in a neonate with severe peroxisomal dysfunction and persistent hypoglycemia. American Journal Of Medical Genetics Part A 2021, 188: 357-363. PMID: 34623748, PMCID: PMC8678290, DOI: 10.1002/ajmg.a.62520.Peer-Reviewed Original ResearchConceptsBifunctional protein deficiencyEarly mortalityClinical spectrumPersistent hypoglycemiaDBP deficiencyFat-soluble vitamin deficiencyImportant prognostic informationProtein deficiencyEnzyme deficiencyYears of lifePeroxisomal enzyme deficienciesResidual enzyme functionAbsent enzyme activityRapid whole-genome sequencingUnexplained hypoglycemiaEarly managementPrognostic informationVitamin deficiencyClinical severityNeonatal hypotoniaHigh burdenPeroxisomal dysfunctionPatient's fatherPsychomotor delayLong-chain fatty acids
2014
Brain Malformations Associated With Knobloch Syndrome—Review of Literature, Expanding Clinical Spectrum, and Identification of Novel Mutations
Caglayan AO, Baranoski JF, Aktar F, Han W, Tuysuz B, Guzel A, Guclu B, Kaymakcalan H, Aktekin B, Akgumus GT, Murray PB, Erson-Omay EZ, Caglar C, Bakircioglu M, Sakalar YB, Guzel E, Demir N, Tuncer O, Senturk S, Ekici B, Minja FJ, Šestan N, Yasuno K, Bilguvar K, Caksen H, Gunel M. Brain Malformations Associated With Knobloch Syndrome—Review of Literature, Expanding Clinical Spectrum, and Identification of Novel Mutations. Pediatric Neurology 2014, 51: 806-813.e8. PMID: 25456301, PMCID: PMC5056964, DOI: 10.1016/j.pediatrneurol.2014.08.025.Peer-Reviewed Original ResearchConceptsBrain malformationsKnobloch syndromeCentral nervous system malformationsExpanding Clinical SpectrumStructural brain abnormalitiesStructural brain malformationsNervous system malformationsHuman cerebral cortexHuman cortical developmentWhole-exome sequencingConfirmatory Sanger sequencingCase seriesClinical presentationCerebral cortexClinical spectrumBrain abnormalitiesOcular abnormalitiesSystem malformationsClinical utilityCortical developmentImmunohistochemical analysisRare diseaseCOL18A1 mutationsBrain developmentPatientsFBXO7–R498X mutation: Phenotypic variability from chorea to early onset parkinsonism within a family
Gündüz A, Eken A, Bilgiç B, Hanagasi HA, Bilgüvar K, Günel M, Başak A, Ertan S. FBXO7–R498X mutation: Phenotypic variability from chorea to early onset parkinsonism within a family. Parkinsonism & Related Disorders 2014, 20: 1253-1256. PMID: 25169713, DOI: 10.1016/j.parkreldis.2014.07.016.Peer-Reviewed Original ResearchConceptsEarly-onset parkinsonismPostural instabilityIndex caseFBXO7 mutationsPallido-pyramidal syndromeTremor-dominant parkinsonismIntrafamilial phenotypic variationDiverse clinical phenotypesMild parkinsonismClinical spectrumSevere apathyAtypical featuresParkinsonismOnset parkinsonismClinical phenotypeConsanguineous parentsMonogenic causesChoreaExomic sequencingSpeech problemsElder sisterGenetic findingsKurdish originPatientsMaternal grandfather