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Updated: Aug 15, 2026
10:12
Protein Misfolding Cyclic Amplification of Prions
Published on: November 7, 2012
Genetic prion disease: the EUROCJD experience
Gábor G Kovács1, Maria Puopolo, Anna Ladogana
1Austrian Reference Centre for Human Prion Diseases (OERPE), Vienna, Austria.
Human Genetics
|September 28, 2005
Summary
Genetic prion diseases (gTSEs) show varied phenotypes and frequencies globally. Genetic screening aids early diagnosis, even without a family history, improving TSE risk identification.
Area of Science:
- Neurology
- Genetics
- Epidemiology
Background:
- 10-15% of human prion diseases are genetic, caused by mutations in the prion protein gene (PRNP).
- Understanding the phenotype, distribution, and frequency of genetic TSEs (gTSEs) is crucial for diagnosis and management.
Purpose of the Study:
- To examine the phenotype, distribution, and frequency of gTSEs across different countries.
- To compare clinical features and diagnostic utility of tests for various gTSE forms.
Main Methods:
- Collected standardized data on gTSEs from 1993-2002 within the EUROCJD collaborative surveillance project.
- Analyzed clinicopathological phenotypes including genetic Creutzfeldt-Jakob disease (gCJD), fatal familial insomnia (FFI), and Gerstmann-Sträussler-Scheinker disease (GSS).
Main Results:
- PRNP gene mutations (point and insertional) varied significantly in frequency by country, with E200K being the most common.
- A significant proportion of cases lacked family history (12-88%). FFI and GSS presented earlier than gCJD.
- Insertions led to longer illness duration than point mutations; diagnostic tests (CSF 14-3-3, EEG, MRI) were less sensitive for non-point mutation forms.
Conclusions:
- The term "genetic TSE" (gTSE) is preferred over "familial TSE" due to infrequent family history.
- Genetic screening offers early diagnosis and identification of TSE risk, regardless of family history.
- gTSEs present diverse phenotypes and frequencies, necessitating tailored diagnostic approaches.
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