Clinical and pathological studies of familial amyotrophic lateral sclerosis (FALS) with SOD1 H46R mutation in large Japanese families - PubMed (original) (raw)
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Clinical and pathological studies of familial amyotrophic lateral sclerosis (FALS) with SOD1 H46R mutation in large Japanese families
Takayo Arisato et al. Acta Neuropathol. 2003 Dec.
Abstract
We clarified the clinical and pathological aspects of familial amyotrophic lateral sclerosis (FALS) with SOD1 H46R heterozygous mutation in the Miyakonojo Basin, a region in southern Japan where the prevalence of ALS is 11.4 per 10(5) of the population. We studied 17 patients, including one autopsy case, in three FALS families with the mutation. The average age at disease onset in the families was 44.3+/-8.7 years, and the mean disease duration was 12+/-7.6 years, with a range of 6 to 30 years. Ten of 17 patients were unable to walk by the mean age of 56.4+/-12.2 years. The initial symptom was muscle weakness in the distal leg muscle in all patients. The autopsy findings of one FALS patient showed atrophy of lateral and anterior funiculi, decreased numbers of anterior horn cells, preserved posterior funiculus and absence of neuronal inclusion bodies. Percentages of mutant SOD1 protein measured by mass spectrometry were 14% in erythrocytes, 43% in the spinal cord, 47% in the iliopsoas muscle and 60% in the diaphragm. In this study, we confirmed that FALS with SOD1 H46R mutation showed uniform initial symptoms and slow disease progression with intra-familial variation of disease severity and that inclusion body formation is not essential in FALS with this mutation.
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