TY - JOUR
T1 - Novel compound heterozygous mutation in NPC1 gene cause Niemann–Pick disease type C with juvenile onset
AU - Costanzo, Maria Cristina
AU - Nicotera, Antonio Gennaro
AU - Vinci, Mirella
AU - Vitello, Aurelio
AU - Fiumara, Agata
AU - Calì, Francesco
AU - Musumeci, Sebastiano Antonino
PY - 2020/12/1
Y1 - 2020/12/1
N2 - Niemann–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 NPC.
AB - Niemann–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 NPC.
KW - cognitive impairment
KW - Miglustat
KW - missense mutation
KW - Niemann–Pick disease type C
KW - NPC1 gene
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U2 - 10.1007/s12041-020-01198-7
DO - 10.1007/s12041-020-01198-7
M3 - Article
C2 - 32482919
AN - SCOPUS:85083661674
VL - 99
JO - Journal of Genetics
JF - Journal of Genetics
SN - 0022-1333
IS - 1
M1 - 30
ER -