Movement Disorders (revue)

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Pseudo-heterozygous Rearrangement Mutation of parkin

Identifieur interne : 001014 ( Main/Exploration ); précédent : 001013; suivant : 001015

Pseudo-heterozygous Rearrangement Mutation of parkin

Auteurs : Manabu Funayama [Japon] ; Hiroyo Yoshino [Japon] ; YUANZHE LI [Japon] ; Hiromichi Kusaka [Japon] ; Hiroyuki Tomiyama [Japon] ; Nobutaka Hattori [Japon]

Source :

RBID : Pascal:12-0183685

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English descriptors

Abstract

Background: Mutations in parkin are the most frequent cause of autosomal recessive parkinsonism. Quantitative PCR is used to detect parkin rearrangements. However, the method has an inherent problem-deletion and duplication in the same allelic exon could be determined as normal. To present this misidentification, we report a family with compound heterozygous rearrangements in parkin. Methods: A patient with early-onset parkinsonism and the parents were investigated by quantitative PCR, haplotype analysis, reverse-transcription PCR, and direct sequencing. Results: A single heterozygous duplication (duplication of exons 6-7) was identified in the patient by quantitative PCR. Detailed analysis of the family revealed the patient carried compound heterozygous of combined deletion (deletion of exons 3-5) and duplication (duplication of exons 3-7). Conclusions: For correct determination of rearrangement mutation, mutation analysis of the patient as well as other family members and/or break-point analysis of genomic DNA and at the transcript level should be conducted.


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<term>Mutation</term>
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<term>Maladie de Parkinson</term>
<term>Pathologie du système nerveux</term>
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<div type="abstract" xml:lang="en">Background: Mutations in parkin are the most frequent cause of autosomal recessive parkinsonism. Quantitative PCR is used to detect parkin rearrangements. However, the method has an inherent problem-deletion and duplication in the same allelic exon could be determined as normal. To present this misidentification, we report a family with compound heterozygous rearrangements in parkin. Methods: A patient with early-onset parkinsonism and the parents were investigated by quantitative PCR, haplotype analysis, reverse-transcription PCR, and direct sequencing. Results: A single heterozygous duplication (duplication of exons 6-7) was identified in the patient by quantitative PCR. Detailed analysis of the family revealed the patient carried compound heterozygous of combined deletion (deletion of exons 3-5) and duplication (duplication of exons 3-7). Conclusions: For correct determination of rearrangement mutation, mutation analysis of the patient as well as other family members and/or break-point analysis of genomic DNA and at the transcript level should be conducted.</div>
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