2019
Loss of UGP2 in brain leads to a severe epileptic encephalopathy, emphasizing that bi-allelic isoform-specific start-loss mutations of essential genes can cause genetic diseases
Perenthaler E, Nikoncuk A, Yousefi S, Berdowski WM, Alsagob M, Capo I, van der Linde HC, van den Berg P, Jacobs EH, Putar D, Ghazvini M, Aronica E, van IJcken WFJ, de Valk WG, Medici-van den Herik E, van Slegtenhorst M, Brick L, Kozenko M, Kohler JN, Bernstein JA, Monaghan KG, Begtrup A, Torene R, Al Futaisi A, Al Murshedi F, Mani R, Al Azri F, Kamsteeg EJ, Mojarrad M, Eslahi A, Khazaei Z, Darmiyan FM, Doosti M, Karimiani EG, Vandrovcova J, Zafar F, Rana N, Kandaswamy KK, Hertecant J, Bauer P, AlMuhaizea MA, Salih MA, Aldosary M, Almass R, Al-Quait L, Qubbaj W, Coskun S, Alahmadi KO, Hamad MHA, Alwadaee S, Awartani K, Dababo AM, Almohanna F, Colak D, Dehghani M, Mehrjardi MYV, Gunel M, Ercan-Sencicek AG, Passi GR, Cheema HA, Efthymiou S, Houlden H, Bertoli-Avella AM, Brooks AS, Retterer K, Maroofian R, Kaya N, van Ham TJ, Barakat TS. Loss of UGP2 in brain leads to a severe epileptic encephalopathy, emphasizing that bi-allelic isoform-specific start-loss mutations of essential genes can cause genetic diseases. Acta Neuropathologica 2019, 139: 415-442. PMID: 31820119, PMCID: PMC7035241, DOI: 10.1007/s00401-019-02109-6.Peer-Reviewed Original ResearchConceptsUDP-glucose pyrophosphorylase genePluripotent stem cell differentiationGenetic diseasesUnfolded protein responseVisual disturbancesAltered glycogen metabolismPremature neuronal differentiationStem cell differentiationEpileptic encephalopathyUpregulated unfolded protein responseDevelopmental delayEssential genesEssential proteinsTherapy-resistant seizuresDifferentiation defectsMutant animalsStart codonMultiple lineagesProtein responseNeural stem cellsSevere epileptic encephalopathySimilar disease mechanismsSevere developmental delayShort isoformProtein absence
2015
A congenital disorder of deglycosylation: Biochemical characterization of N-glycanase 1 deficiency in patient fibroblasts
He P, Grotzke JE, Ng BG, Gunel M, Jafar-Nejad H, Cresswell P, Enns GM, Freeze HH. A congenital disorder of deglycosylation: Biochemical characterization of N-glycanase 1 deficiency in patient fibroblasts. Glycobiology 2015, 25: 836-844. PMID: 25900930, PMCID: PMC4487302, DOI: 10.1093/glycob/cwv024.Peer-Reviewed Original ResearchMeSH KeywordsBacterial ProteinsDevelopmental DisabilitiesEnzyme AssaysExonsEye Diseases, HereditaryFibroblastsGene ExpressionGenes, ReporterHepatic InsufficiencyHumansLacrimal Apparatus DiseasesLuminescent ProteinsMutationPeptide-N4-(N-acetyl-beta-glucosaminyl) Asparagine AmidasePeripheral Nervous System DiseasesPrimary Cell CultureSeizuresConceptsAbnormal liver functionPatient fibroblastsPeripheral neuropathyLiver functionPatient-derived fibroblastsDevelopmental delayCongenital disorderN-glycanase 1 (NGLY1) deficiencyVenus fluorescencePronounced reductionFibroblastsN-glycanase 1Enzymatic activityMutationsNGLY1NeuropathyPatientsSeizuresAlacrimaActivity