Abstract:
:The C9orf72 expansion is considered a major genetic cause of familial frontotemporal dementia (FTD) in several patients' cohorts. Interestingly, C9orf72 expansion carriers, present also abundant neuronal p62-positive inclusions. Although p62/SQSTM1 mutations were initially associated with Paget disease of bone (PDB), they have been also identified in FTD. We describe an FTD-PDB family in which the proband presented with behavioral FTD phenotype and concomitant Paget disease. The molecular genetic analysis revealed the co-occurrence of 2 mutations; the pathogenic C9orf72 expansion and p.P392L heterozygous missense mutation in SQSTM1 gene. Amongst the 6 family members analyzed, the p.P392L SQSTM1 mutation segregated as expected with PDB, whereas the C9orf72 expansion segregated with frontal cognitive impairment or dementia in all but one carrier. The coexistence of these conditions could be underestimated since neither patients with FTD nor patients with PDB undergo bone scintigraphy or cognitive assessment, respectively. The number of cases with double mutations could also be over looked as the molecular strategy adopted in most laboratories ends with the identification of one pathogenic mutation in one of the known causative genes. Therefore, we advocate for further clinical and molecular evaluation in suspect cases.
journal_name
Neurobiol Agingjournal_title
Neurobiology of agingauthors
Almeida MR,Letra L,Pires P,Santos A,Rebelo O,Guerreiro R,van der Zee J,Van Broeckhoven C,Santana Idoi
10.1016/j.neurobiolaging.2015.12.015subject
Has Abstractpub_date
2016-04-01 00:00:00pages
191.e1-191.e8eissn
0197-4580issn
1558-1497pii
S0197-4580(15)00631-4journal_volume
40pub_type
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journal_title:Neurobiology of aging
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journal_title:Neurobiology of aging
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journal_title:Neurobiology of aging
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journal_title:Neurobiology of aging
pub_type: 杂志文章,多中心研究
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journal_title:Neurobiology of aging
pub_type: 杂志文章
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journal_title:Neurobiology of aging
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doi:10.1016/j.neurobiolaging.2012.11.001
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journal_title:Neurobiology of aging
pub_type: 杂志文章
doi:10.1016/j.neurobiolaging.2008.10.006
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journal_title:Neurobiology of aging
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journal_title:Neurobiology of aging
pub_type: 杂志文章
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journal_title:Neurobiology of aging
pub_type: 杂志文章
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pub_type: 杂志文章
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