Novel compound heterozygous mutation in NPC1 gene cause Niemann

Costanzo, Maria CristinaNicotera, Antonio GennaroMirella VinciVitello, AurelioFiumara, AgataCali, FrancescoMusumeci, Sebastiano Antonino2020-11-182020-11-182020-04Costanzo Maria Cristina, Nicotera Antonio Gennaro, Mirella Vinci, Vitello Aurelio, Fiumara Agata, Cali Francesco, Musumeci Sebastiano Antonino. Novel compound heterozygous mutation in NPC1 gene cause Niemann–Pick disease type C with juvenile onset. Journal of Genetics. 2020 Apr; 99: 1-50022-13330973-7731http://imsear.searo.who.int/handle/123456789/215533Niemann–Pick disease type C (NPC) is a progressive lysosomal storage disorder caused by mutations in the NPC1 (in 95% of cases) or NPC2 (in *5% of cases) genes, inherited in an autosomal recessive manner. We report the case of a 38-year-old woman with learning disorder from her first year of schooling, and could notice slow progressed cognitive impairment, social withdrawal, apathy, handwriting alterations, deterioration of language skills and dysphagia. Brain magnetic resonance imaging showed severe cerebellar atrophy, hypoplasia of the corpus callosum, asymmetric lateral ventricular enlargement, and severe enlargement of frontal and parietal subarachnoid spaces. Next generation sequencing for NPC genes (NPC1 and NPC2) detected compound heterozygous mutations in NPC1 gene, including c.1553G [A (p.Arg518Gln), paternally inherited, and c.1270C [ T (p.Pro424Ser) maternally inherited. The first mutation has been already described in literature and correlated to NPC, while the second mutation is still unknown. Moreover, filipin test and quantification of plasma oxysterols confirmed NPC diagnosis. We can suggest the missense mutation c.1270C [ T (p.Pro424Ser) as a new causative mutation of NPCcognitive impairmentMiglustatmissense mutationNiemann–Pick disease type CNPC1 gene.Novel compound heterozygous mutation in NPC1 gene cause Niemann–Pick disease type C with juvenile onsetJournal ArticleIndiaOasi Research Institute – IRCCS, 94018 Troina, ItalyOasi Research Institute – IRCCS, 94018 Troina, ItalyChild Neuropsychiatry Unit, Department of Human Pathology of the Adult and Developmental Age, University of Messina, 98125 Messina, ItalyOasi Research Institute – IRCCS, 94018 Troina, ItalyOasi Research Institute – IRCCS, 94018 Troina, ItalyRegional Referral Centre for Inborn Errors Metabolism, Pediatric Clinic, Department of Clinical and Experimental Medicine, University of Catania, 95123 Catania, ItalyOasi Research Institute – IRCCS, 94018 Troina, ItalyOasi Research Institute – IRCCS, 94018 Troina, Italy