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Published on: February 14, 2025
Creutzfeldt-Jakob disease.
Beata Sikorska1, Richard Knight, James W Ironside
1Department of Molecular Pathology and Neuropathology, Medical University Lodz, Lodz, Poland.
Advances in Experimental Medicine and Biology
|March 14, 2012
Summary
Creutzfeldt-Jakob disease (CJD), a rare neurodegenerative disorder, encompasses four types: sporadic, genetic, iatrogenic, and variant. Classification of sporadic CJD involves prion peptide and PRNP gene status, aiding in understanding disease subtypes.
Area of Science:
- Neurology
- Neuroscience
- Pathology
Background:
- Creutzfeldt-Jakob disease (CJD) is the most prevalent human prion disease, a type of transmissible spongiform encephalopathy (TSE).
- Four distinct types of CJD are recognized: sporadic (sCJD), genetic (gCJD), iatrogenic (iCJD), and variant (vCJD), with vCJD linked to bovine spongiform encephalopathy (BSE).
Purpose of the Study:
- To outline the classification and neuropathological features of Creutzfeldt-Jakob disease.
- To detail the subtypes of sporadic CJD based on prion protein characteristics and genetic factors.
Main Methods:
- Classification of sporadic CJD using PrP(Sc) peptide size (21 kDa or 19 kDa) and PRNP gene codon 129 polymorphism (Methionine or Valine).
- Neuropathological examination including spongiform change, gliosis, neuronal loss, and PrP immunohistochemistry to identify deposit types (synaptic, perivacuolar, perineuronal, plaque-like).
Main Results:
- Sporadic CJD is classified into 6 subtypes (MM1, MV1, VV2, MV2, MM2, VV1) based on PrP(Sc) and PRNP codon 129 status, with MM1 and MV1 being most common.
- Genetic CJD arises from various PRNP gene mutations.
- Neuropathology typically shows spongiform changes, gliosis, and neuronal loss, with amyloid plaques observed in some cases. PrP(Sc) deposits vary, with synaptic type being most frequent.
Conclusions:
- CJD classification relies on distinct etiological categories and molecular subtypes.
- Understanding the neuropathological and molecular characteristics of CJD subtypes is crucial for diagnosis and research.
- Prion protein analysis and genetic profiling are key diagnostic tools for differentiating CJD types and subtypes.
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