A Mild Form of COG5 Defect Showing Early-Childhood-Onset Friedreich's-Ataxia-Like Phenotypes with Isolated Cerebellar Atrophy
Journal of Korean Medical Science
; : 1885-1890, 2017.
Article
in En
| WPRIM
| ID: wpr-163183
Responsible library:
WPRO
ABSTRACT
Progressive cerebellar ataxias are rare diseases during childhood, especially under 6 years of age. In a single family, three affected siblings exhibited Friedreich's-ataxia-like phenotypes before 2 years of age. They had progressive cerebellar atrophy, intellectual disability, and scoliosis. Although their phenotypes were similar to those observed in patients with autosomal recessive cerebellar ataxias, other phenotypes (e.g., seizure, movement disorders, ophthalmologic disturbance, cardiomyopathy, and cutaneous disorders) were not noted in this family. Whole-exome sequencing of the family members revealed one potential heterozygous mutation (c.1209delG, NM_181733.2; p.Met403IlefsX3, NP_859422.2) of the gene encoding conserved oligomeric Golgi complex subunit 5 (COG5). The heterozygous deletion at the fifth base in exon 12 of COG5 caused a frameshift and premature stop. Western blotting of COG5 proteins in the skin tissues from an affected proband showed a significantly decreased level of full length COG5 and smaller, aberrant COG5 proteins. We reported a milder form of COG5 defect showing Friedreich's-ataxia-like phenotypes without hypotonia, microcephaly, and short stature that were observed in most patients with COG5 defect.
Key words
Full text:
1
Database:
WPRIM
Main subject:
Phenotype
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Atrophy
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Scoliosis
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Seizures
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Skin
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Cerebellar Ataxia
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Blotting, Western
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Exons
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Rare Diseases
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Siblings
Limits:
Child
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Humans
Language:
En
Journal:
Journal of Korean Medical Science
Year:
2017
Document type:
Article