Pontocerebellar hypoplasia (PCH) represents a group of autosomal-recessive progressive neurodegenerative disorders of prenatal onset. Eleven PCH subtypes are classified according to clinical, neuroimaging and genetic findings. Individuals with PCH type 9 (PCH9) have a unique combination of postnatal microcephaly, hypoplastic cerebellum and pons, and hypoplastic or absent corpus callosum. PCH9 is caused by biallelic variants in AMPD2 encoding adenosine monophosphate deaminase 2; however, a homozygous AMPD2 frameshift variant has recently been reported in two family members with spastic paraplegia type 63 (SPG63). We identified homozygous or compound heterozygous AMPD2 variants in eight PCH-affected individuals from six families. The eight variants likely affect function and comprise one frameshift, one nonsense and six missense variants; seven of which were novel.
Clinical and genetic spectrum of AMPD2-related pontocerebellar hypoplasia type 9 / Kortüm F, Jamra RA, Alawi M, Berry SA, Borck G, Helbig KL, Tang S, Huhle D, Korenke GC, Hebbar M, Shukla A, Girisha KM, Steinlin M, Waldmeier-Wilhelm S, Montomoli M, Guerrini R, Lemke JR, Kutsche K. - In: EUROPEAN JOURNAL OF HUMAN GENETICS. - ISSN 1018-4813. - ELETTRONICO. - 26:(2018), pp. 695-708. [10.1038/s41431-018-0098-2]
Clinical and genetic spectrum of AMPD2-related pontocerebellar hypoplasia type 9
Guerrini R;
2018
Abstract
Pontocerebellar hypoplasia (PCH) represents a group of autosomal-recessive progressive neurodegenerative disorders of prenatal onset. Eleven PCH subtypes are classified according to clinical, neuroimaging and genetic findings. Individuals with PCH type 9 (PCH9) have a unique combination of postnatal microcephaly, hypoplastic cerebellum and pons, and hypoplastic or absent corpus callosum. PCH9 is caused by biallelic variants in AMPD2 encoding adenosine monophosphate deaminase 2; however, a homozygous AMPD2 frameshift variant has recently been reported in two family members with spastic paraplegia type 63 (SPG63). We identified homozygous or compound heterozygous AMPD2 variants in eight PCH-affected individuals from six families. The eight variants likely affect function and comprise one frameshift, one nonsense and six missense variants; seven of which were novel.I documenti in FLORE sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.