Abstract
The definitive diagnosis of the CJD (Creutzfeldt-Jakob disease; very rare neurodegenerative disorder) can be established only on the basis of post-mortem examination of the central nervous system tissue. Formaldehyde-fixed paraffin-embedded (FFPE) tissue samples may thus constitute the only material available for molecular pathology analyses. We performed post-mortem analysis of the coding region of the prion-protein gene (PRNP)-sequence variations in two definite CJD cases suggestive of genetic form. Only FFPE tissues were available for molecular analyses. ThePRNP gene open reading frame was amplified from the genomic DNA (FFPE isolated) in four overlapping, two round semi-nested PCR products that were directly sequenced. We found known pathogenic sequence variation g.532 G>A (Asp178Asn) in patient1 but we did not find any pathogenic sequence variation in patient2 despite her origin from the Slovak Orava region. Based on these results, we were able to discriminate between genetic and sporadic form of CJD in patient1 and2, respectively. The established method was found to be efficient for the sequence-variation analysis of the entirePRNP gene coding region using the genomic DNA isolated from the FFPE tissues; it can be employed in other retrospective molecular studies.
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Abbreviations
- CJD:
-
Creutzfeldt Jacob disease
- FFPE:
-
formaldehyde-fixed paraffin-embedded
- NBF:
-
neutral buffered aqueous formaldehyde
- ORF:
-
open reading frame
- PCR:
-
polymerase chain reaction
- PRNP :
-
prion protein gene
- PrPres:
-
prion protein proteinase-resistant
- SAF:
-
scrappie-associated fibril
- TSE:
-
transmissible spongiform encephalopathy(ies)
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This research was funded by the research projects of theMinistry of Education, Youth and Sports of the Czech Republic (no. 111 100 003 and 002 162 0806).
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Sikora, J., Srbová, A., Koukolík, F. et al. Retrospective sequence analysis of the humanPRNP gene from the formaldehyde-fixed paraffin-embedded tissues: Report of two cases of creutzfeldt-jakob disease. Folia Microbiol 51, 619–625 (2006). https://doi.org/10.1007/BF02931629
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DOI: https://doi.org/10.1007/BF02931629