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Arch Neurol. 2004 May;61(5):701-4.

Clinical findings in a large family with a parkin ex3delta40 mutation.

Author information

1
Movement Disorders Centre, Toronto Western Hospital, and Centre for Research in Neurodegenerative Diseases, University of Toronto, Toronto, Ontario, Canada.

Abstract

OBJECTIVE:

To describe a large consanguineous family in which inheritance of a 438- to 477-base pair deletion in exon 3 (Ex3Delta40) in the parkin gene resulted in parkinsonism (age range at onset, 24-32 years).

DESIGN:

Fifty-two family members underwent genetic analysis.

MAIN OUTCOME MEASURE:

Two clinical examiners blinded to genetic status evaluated 21 family members, including all mutation carriers (4 homozygous and 12 heterozygous individuals; 5 family members did not have the mutation).

RESULTS:

In this family, the parkin Ex3Delta40 mutation is recessive; only homozygotes manifest symptoms of early-onset levodopa-responsive parkinsonism, including resting tremor, dystonia, and slow progression, with the caveat that presymptomatic signs of dopaminergic loss in heterozygotes must be excluded by fluorodopa F 18 with positron emission tomography. This contrasts with the autosomal dominant pattern of inheritance of parkinsonism described in families with the same mutation.

CONCLUSION:

In families with a dominant inheritance, an additional genetic or environmental cause must coexist with the Ex3Delta40 mutation.

PMID:
15148147
DOI:
10.1001/archneur.61.5.701
[Indexed for MEDLINE]
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