期刊
MOLECULAR NEURODEGENERATION
卷 9, 期 -, 页码 -出版社
BMC
DOI: 10.1186/1750-1326-9-44
关键词
COQ2; Multiple system atrophy; Genetics; CoQ10 deficiency
资金
- National Institutes of Health [R01 NS078086]
- Morris K. Udall Parkinson's Disease Research Center of Excellence [P50 NS072187]
- Mayo Clinic Center for Regenerative Medicine
- Michael J. Fox Foundation for Parkinson's Research
- Susan Bass Bolch
Background: Loss of function COQ2 mutations results in primary CoQ10 deficiency. Recently, recessive mutations of the COQ2 gene have been identified in two unrelated Japanese families with multiple system atrophy (MSA). It has also been proposed that specific heterozygous variants in the COQ2 gene may confer susceptibility to sporadic MSA. To assess the frequency of COQ2 variants in patients with MSA, we sequenced the entire coding region and investigated all exonic copy number variants of the COQ2 gene in 97 pathologically-confirmed and 58 clinically-diagnosed MSA patients from the United States. Results: We did not find any homozygous or compound heterozygous pathogenic COQ2 mutations including deletion or multiplication within our series of MSA patients. In two patients, we identified two heterozygous COQ2 variants (p. S54W and c. 403 + 10G > T) of unknown significance, which were not observed in 360 control subjects. We also identified one heterozygous carrier of a known loss of function p. S146N substitution in a severe MSA-C pathologically-confirmed patient. Conclusions: The COQ2 p. S146N substitution has been previously reported as a pathogenic mutation in primary CoQ10 deficiency (including infantile multisystem disorder) in a recessive manner. This variant is the third primary CoQ10 deficiency mutation observed in an MSA case (p. R387X and p. R197H). Therefore it is possible that in the heterozygous state it may increase susceptibility to MSA. Further studies, including reassessing family history in patients of primary CoQ10 deficiency for the possible occurrence of MSA, are now warranted to resolve the role of COQ2 variation in MSA.
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