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Novel Prion Protein Conformation and Glycotype in Creutzfeldt-Jakob Disease
Gianluigi Zanusso, MD, PhD;
Alberto Polo, MD;
Alessia Farinazzo, PhD;
Romolo Nonno, DMV;
Franco Cardone, PhD;
Michele Di Bari, PhD;
Sergio Ferrari, MD;
Serena Principe, PhD;
Matteo Gelati, PhD;
Elisa Fasoli, PhD;
Michele Fiorini, PhD;
Frances Prelli, PhD;
Blas Frangione, MD, PhD;
Giuseppe Tridente, MD;
Marina Bentivoglio, MD;
Alessandra Giorgi, PhD;
Maria Eugenia Schininà, PhD;
Bruno Maras, PhD;
Umberto Agrimi, DMV;
Nicola Rizzuto, MD;
Maurizio Pocchiari, MD;
Salvatore Monaco, MD
Arch Neurol. 2007;64(4):595-599.
Objective To describe a novel molecular and pathological phenotype of Creutzfeldt-Jakob disease.
Patient A 69-year-old woman with behavioral and personality changes followed by rapidly evolving dementia.
Results Postmortem examination of the brain showed intracellular prion protein deposition and axonal swellings filled with amyloid fibrils. Biochemical analysis of the pathological prion protein disclosed a previously unrecognized PrPSc tertiary structure lacking diglycosylated species. Genetic analysis revealed a wild-type prion protein gene. The prion agent responsible for this atypical phenotype was successfully passaged to bank voles.
Conclusion To our knowledge, our results define a new human prion disorder characterized by intracellular accumulation of a novel type of pathological prion protein.
Author Affiliations: Departments of Neurologic and Visual Sciences (Drs Zanusso, Farinazzo, Ferrari, Gelati, Fasoli, Fiorini, Rizzuto, and Monaco), Pathology (Dr Tridente), and Morphologic and Biomedical Sciences (Dr Bentivoglio), University of Verona, Verona, Italy; Ospedale Piove di Sacco, Piove di Sacco, Italy (Dr Polo); Departments of Food Safety and Veterinary Public Health (Drs Nonno, Di Bari, and Agrimi) and Cell Biology and Neurosciences (Drs Cardone, Principe, and Pocchiari), Istituto Superiore di Sanità, and Department of Biochemistry and Centro di Eccellenza BEMM, University of Rome "La Sapienza" (Drs Giorgi, Schininà, and Maras), Rome, Italy; and Department of Pathology, New York University Medical Center, New York (Drs Prelli and Frangione).
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