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Novel PRNP mutation in a patient with a slow progressive dementia syndrome


Heinemann, U; Krasnianski, A; Meissner, B; Grasbon-Frodl, E M; Kretzschmar, H A; Zerr, I (2008). Novel PRNP mutation in a patient with a slow progressive dementia syndrome. Medical Science Monitor, 14(5):CS41-43.

Abstract

BACKGROUND: Creutzfeldt-Jakob disease is a rare neurodegenerative disorder with a worldwide incidence of 1.5 per million inhabitants. About 10-15% of all cases of Creutzfeldt-Jakob disease are of genetic origin and display a large variety in clinical presentation (regarding disease duration, age at onset, and others). The goal of this report was to describe the clinical features and diagnostic tests in a patient with a novel prion protein gene (PRNP) D202G mutation. CASE REPORT: A 71-year-old patient had all the clinical signs of Creutzfeldt-Jakob disease (CJD) but an extremely prolonged disease duration of 16 years. The 14-3-3 protein test was positive, while MRI and EEG did not show CJD typical changes. Family history was positive for cerebellar and dementia disorders without definite diagnoses. Full-length sequencing of the prion protein gene (PRNP) showed a new D202G mutation associated with valine on codon 129 of unknown significance. Methionine/valine heterozygosity at codon 129 was found. CONCLUSIONS: These findings highlight the value of 14-3-3 and gene analysis in unclear neurological disorders to detect possibly atypical presentations of prion disorders. The significance of this new mutation will remain unclear until further such patients are reported.

Abstract

BACKGROUND: Creutzfeldt-Jakob disease is a rare neurodegenerative disorder with a worldwide incidence of 1.5 per million inhabitants. About 10-15% of all cases of Creutzfeldt-Jakob disease are of genetic origin and display a large variety in clinical presentation (regarding disease duration, age at onset, and others). The goal of this report was to describe the clinical features and diagnostic tests in a patient with a novel prion protein gene (PRNP) D202G mutation. CASE REPORT: A 71-year-old patient had all the clinical signs of Creutzfeldt-Jakob disease (CJD) but an extremely prolonged disease duration of 16 years. The 14-3-3 protein test was positive, while MRI and EEG did not show CJD typical changes. Family history was positive for cerebellar and dementia disorders without definite diagnoses. Full-length sequencing of the prion protein gene (PRNP) showed a new D202G mutation associated with valine on codon 129 of unknown significance. Methionine/valine heterozygosity at codon 129 was found. CONCLUSIONS: These findings highlight the value of 14-3-3 and gene analysis in unclear neurological disorders to detect possibly atypical presentations of prion disorders. The significance of this new mutation will remain unclear until further such patients are reported.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:04 Faculty of Medicine > Institute for Regenerative Medicine (IREM)
Dewey Decimal Classification:610 Medicine & health
Language:English
Date:May 2008
Deposited On:09 Apr 2009 12:22
Last Modified:04 Sep 2016 07:51
Publisher:Medical Science International Publishing
ISSN:1234-1010
Official URL:http://www.medscimonit.com/fulltxt.php?ICID=855741
PubMed ID:18443555

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