The spectrum of transmissible spongiform encephalopathies

Intervirology
T Weber, A Aguzzi

Abstract

Since the first description by A.M. Jakob and H.G. Creutzfeldt, five human diseases have been identified as transmissible spongiform encephalopathies (TSE). The disease bearing these authors' name, Creutzfeldt-Jakob disease (CJD) occurs sporadically, may be transmitted and has a genetic basis in 10-15% of all cases. Genetic diseases are the Gerstmann-Sträussler-Scheinker syndrome and fatal familial insomnia. The latest form of CJD in humans, variant CJD (vCJD), was first described in 1996 and may be considered as evidence for a link between human TSEs and those in the animal kingdom. The putative agent of all TSEs is a proteinaceous infectious agent or prion. The gene for the physiological isoform of this protein (prion related protein or PrPc)-is encoded on the short arm of chromosome 20 in humans. The role of the physiological isoform of PrPc is unknown. The physiological isoform PrPc is protease-sensitive and thus designated as PrP-sen, while the pathological isoform is protease-resistant and thus called PrP-res. The pathological isoform PrP-res is invariably associated with TSEs and has given rise to the term prion diseases. PrP-sen and PrP-res have an identical amino acid sequence and have identical posttranslational modif...Continue Reading

Citations

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