Białko 14-3-3 w diagnostyce sporadycznej choroby Creutzfeldta-Jakoba

• Authors: Ewa Golańska , Paweł P. Liberski

Title variants

EN

14-3-3 protein in diagnostics of sporadic Creutzfeldt-Jakob disease

• Languages of publication: PL

Abstracts

PL

Choroba Creutzfeldta-Jakoba (CJD) należy do grupy chorób wywoływanych przez priony, w których do ustalenia definitywnego rozpoznania konieczne jest badanie neuropatologiczne mózgu. Przyżyciowo można chorobę zdiagnozować jako możliwą lub prawdopodobną, zgodnie z kryteriami zalecanymi przez Światową Organizację Zdrowia. W kryteriach diagnostycznych dla sporadycznej postaci CJD (sCJD) uwzględniono marker biochemiczny – dodatni wynik testu na obecność białka 14-3-3 w płynie mózgowo-rdzeniowym. W nowych zmodyfikowanych kryteriach dla sCJD, obowiązujących od 2010 roku, znajduje się również badanie mózgu metodą rezonansu magnetycznego wykonanego w sekwencji FLAIR lub DWI. Białka z grupy 14-3-3 są prawidłowymi białkami neuronalnymi, uwalnianymi do płynu mózgowo-rdzeniowego na skutek obumierania komórek, jest to zatem nieswoisty marker śmierci neuronów. Czułość testu na obecność białka 14-3-3 może być wysoka, zależy jednak od podtypu molekularnego, tempa rozwoju choroby i etapu choroby, na którym wykonano nakłucie lędźwiowe. Dodatni wynik testu pozwala na zmianę klasyfikacji choroby z możliwej na prawdopodobną, ale tylko w połączeniu z innymi kryteriami diagnostycznymi. Rozpatrywanie wyniku – zarówno ujemnego, jak dodatniego – w oderwaniu od kontekstu klinicznego może wprowadzać w błąd. Białko 14-3-3 wykrywa się w około 90% przypadków sCJD oraz jedynie w 50% przypadków wariantu CJD (vCJD), zatem w vCJD badanie posiada dużo mniejsze znaczenie.

EN

Creutzfeldt-Jakob disease (CJD) belongs to a group of transmissible spongiform encephalopathies in which neuropathological confirmation is needed for a definite diagnosis. Based on clinical symptoms, the disease can be characterized only as possible or probable. The diagnostic criteria for sporadic CJD (sCJD) approved by the World Health Organization include 14-3-3 protein as a marker detectable in the cerebrospinal fluid (CSF). Since 2010, also magnetic resonance FLAIR or DWI imaging has been included in the criteria for sCJD. 14-3-3 protein is a normal neuronal protein released to the CSF as a result of extensive neuronal damage. As it is a non-specific marker, a positive result gives no information about the reason of the neuronal death. The test for 14-3-3 protein is useful only when considered in an appropriate clinical context, together with other diagnostic criteria. In certain conditions, false negative as well as false positive results are possible. The 14-3-3 protein is detected in about 90% of sporadic CJD cases, whereas the result is positive in only 50% of variant CJD patients, therefore this analysis is less useful in the diagnostics of vCJD.

Keywords

EN

14-3-3 protein; Creutzfeldt-Jakob disease; badania diagnostyczne; białko 14-3-3; biochemical marker; cerebrospinal fluid; choroba Creutzfeldta-Jakoba; diagnostic tests; marker biochemiczny; płyn mózgowo-rdzeniowy

Discipline

• MEDICINE: MEDICINE

• Publisher: Medical Communications
• Journal: Aktualności Neurologiczne
• Year: 2011
• Volume: 11
• Issue: 1
• Pages: 38-43

Contributors

author

Ewa Golańska

• Zakład Patologii Molekularnej i Neuropatologii, Uniwersytet Medyczny w Łodzi

author

Paweł P. Liberski

• Zakład Patologii Molekularnej i Neuropatologii, Uniwersytet Medyczny w Łodzi

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• Document Type: article