PLA2G6 mutations in PARK14-linked young-onset parkinsonism and sporadic Parkinson's disease.
Am J Med Genet B Neuropsychiatr Genet
; 159B(2): 183-91, 2012 Mar.
Article
em En
| MEDLINE
| ID: mdl-22213678
ABSTRACT
Mutations of PLA2G6 gene have been lately proposed to be the causative gene for PARK14 in patients with autosomal recessive young-onset parkinsonism (YOPD). The role of PLA2G6 mutations as a risk factor for Parkinson's disease is not clear. To study the PLA2G6 mutations in PARK14-linked patients and its association with the onset of sporadic Parkinson's disease (sPD), sequencing and gene dosage analyses were carried out in 25 patients (onset age â¦30 years) then the identified variants were assessed in 956 sporadic PD (sPD) patients and 802 age-matched healthy controls. Four genetic variants were identified; one patient had homozygous c.991G > T (p.Asp331Tyr) mutation, two had compound heterozygous c.991G > T/c.1077G > A (p.Met358IlefsX) mutation, one had single c.1976A > G (p.Asn659Ser) mutation, and one patient had an exon 1 hetero-deletion. The c.1077G > A mutation resulted in a 4-bp deletion in leukocyte mRNA by activating a cryptic splice site in exon 7. Only p.Asp331Tyr was identified in four sPD patients and four controls. The onset age for PLA2G6 mutation carriers was younger than that for sPD (29.86 ± 8.59 vs. 56.84 ± 11.33 years, P = 0.0002). The analysis of previously reported PARK14 patients revealed that those who carried a truncated mutation tended to have a complicated phenotype and atrophies of cortex and cerebellum. In conclusion, PLA2G6 mutation was the second common genetic cause after PRKN mutation in our YOPD patients and might be a risk factor for early-onset PD in Han Chinese. Additionally, mutation data should be interpreted carefully because even a synonymous mutation could cause abnormal mRNA splicing.
Texto completo:
1
Bases de dados:
MEDLINE
Assunto principal:
Transtornos Parkinsonianos
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Ubiquitina-Proteína Ligases
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Fosfolipases A2 do Grupo VI
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Mutação
Tipo de estudo:
Observational_studies
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Prognostic_studies
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Risk_factors_studies
Limite:
Adolescent
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Adult
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Child
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Female
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Humans
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Male
Idioma:
En
Revista:
Am J Med Genet B Neuropsychiatr Genet
Assunto da revista:
GENETICA MEDICA
/
NEUROLOGIA
/
PSIQUIATRIA
Ano de publicação:
2012
Tipo de documento:
Article
País de afiliação:
Taiwan