[On intra-familial clinical diversities of a familial amyotrophic lateral sclerosis with a point mutation of Cu/Zn superoxide dismutase (Asn 86-Ser].
In a familial amyotrophic lateral sclerosis (FALS) with SOD-1 mutation (Asn 86-Ser), there were intra-familial clinical diversities. The proband, a daughter patient, shows a mild clinical course of 16 years. Her father died of respiratory failure in 3 years. His initial symptom was weakness of upper extremity. The daughter's first symptom was that of lower extremities. Her respiratory-assist started after 9 years from the onset. She is alive under whole-day respiratory assist while she had been taking nutrients per os for 15 years. Her abilities of swallowing remain, even more dependent of tube-feeding (15 years after the onset). The fact of the presence of intra-familial clinical varieties with SOD-1 mutation in FALS suggests that the mutation is not an exclusive factor to determine the clinical phenotype, age of the onset and rapidity of illness of FALS associated with SOD-1 mutation. We collect reports of FALS with SOD-1 mutation which have similar diversities of intra-familial clinical manifestations as our family. Varieties of intra-familial clinical manifestations of motor neuron disease are shown in 9 families with SOD-1 mutation. The genetic error appears to have a limit, and is not a exclusive cause of FALS. However, we should not underestimate the significance of the discovery of a gene, since it might offer a clue to still unanswered riddle of ALS pathogenesis.
Maeda
T
T
Department of Neurology, Aomori Prefectural Central Hospital, Japan.
Kurahashi
K
K
Matsunaga
M
M
Inoue
K
K
Inoue
M
M
D000690:Amyotrophic Lateral Sclerosis / Q000175:diagnosis / Q000201:enzymology / Q000235:genetics*; D005192:Family Health; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010375:Pedigree; D017354:Point Mutation; D013482:Superoxide Dismutase / Q000235:genetics*
D013482:Superoxide Dismutase