Expanding the clinical spectrum of SPG11 gene mutations in recessive hereditary spastic paraplegia with thin corpus callosum.
Hereditary spastic paraplegia (HSP) represents a large group of neurological disorders characterized by progressive spasticity of the lower limbs. One subtype of HSP shows an autosomal recessive form of inheritance with thin corpus callosum (ARHSP-TCC), and displays genetic heterogeneity with four known loci. We identified a consanguineous Egyptian family with five affected individuals with ARHSP-TCC. We found linkage to the SPG11 locus and identified a novel homozygous p.Q498X stop codon mutation in exon 7 in the SPG11 gene encoding Spatacsin. Cognitive impairment and polyneuropathy, reported as frequent in SPG11, were not evident. This family supports the importance of SPG11 as a frequent cause for ARHSP-TCC, and expands the clinical SPG11 spectrum.
Medical Molecular Genetics Department, National Research Center, Cairo, Egypt.
Alice
A
Abdel Aleem
Nourhan
N
Abu-Shahba
Dominika
D
Swistun
Jennifer
J
Silhavy
Stephanie L
SL
Bielas
Shifteh
S
Sattar
Joseph G
JG
Gleeson
Maha S
MS
Zaki
D000293:Adolescent; D000328:Adult; D061085:Agenesis of Corpus Callosum; D001483:Base Sequence; D002874:Chromosome Mapping; D002884:Chromosomes, Human, Pair 15 / Q000235:genetics; D003241:Consanguinity; D004252:DNA Mutational Analysis; D005192:Family Health; D005260:Female; D005808:Genes, Recessive; D005838:Genotype; D006801:Humans; D008126:Lod Score; D008297:Male; D009154:Mutation; D010375:Pedigree; D011506:Proteins / Q000235:genetics*; D015419:Spastic Paraplegia, Hereditary / Q000235:genetics* / Q000473:pathology; D055815:Young Adult
D011506:Proteins; C520412:SPG11 protein, human