A case of megalencephalic leukoencephalopathy with subcortical cysts (van der Knaap disease): molecular genetic study.
Megalencephalic leukoencephalopathy with subcortical cysts (MLC) is an autosomal recessive disorder characterized by macrocephaly, deterioration of motor function with ataxia, spasticity and mental decline. It has been revealed that the mutations in the gene, KIAA0027, were responsible for MLC and the gene was renamed subsequently 'MLC1'. A 41-year-old Japanese male with MLC, in whom a homozygous missense mutation, TCG to TTG at codon 93 resulting in S93L, was detected in the MLC1 gene, was described. MRI revealed marked cerebral atrophy and enlargement of the ventricular system. The subject's motor function had severely deteriorated, while his cognitive function had maintained at the level of a 2-year-old for the past 10 years. The mutation in the MLC1 gene of the patient is considered to be a common mutation responsible for MLC in Japanese patients because the same mutation had been detected in two other Japanese patients with MLC.
Saijo
Harumi
H
Tokyo Metropolitan Higashiyamato Medical Center for the Severely Disabled, 3-44-10 Sakuragaoka, Higashiyamato, Tokyo 207-0022, Japan.
Nakayama
Harumi
H
Ezoe
Takanori
T
Araki
Katsuhito
K
Sone
Sui
S
Hamaguchi
Hiroshi
H
Suzuki
Hisaharu
H
Shiroma
Naohide
N
Kanazawa
Naomi
N
Tsujino
Seiichi
S
Hirayama
Yoshito
Y
Arima
Masataka
M
D000328:Adult; D001927:Brain Diseases / Q000235:genetics; D020863:Central Nervous System Cysts / Q000235:genetics* / Q000473:pathology; D002561:Cerebrovascular Disorders / Q000235:genetics / Q000473:pathology; D004252:DNA Mutational Analysis; D015140:Dementia, Vascular / Q000235:genetics*; D020271:Heredodegenerative Disorders, Nervous System / Q000235:genetics / Q000473:pathology; D006801:Humans; D007930:Leucine / Q000235:genetics; D008279:Magnetic Resonance Imaging; D008297:Male; D008565:Membrane Proteins / Q000235:genetics*; D008967:Molecular Biology / Q000379:methods*; D009154:Mutation; D020133:Reverse Transcriptase Polymerase Chain Reaction / Q000379:methods; D017422:Sequence Analysis, DNA; D012694:Serine / Q000235:genetics
C425069:MLC1 protein, human; D008565:Membrane Proteins; D012694:Serine; D007930:Leucine