Abstract

The name príon is given to an altered form of a protein present at the surface of neurons. Prions are remarkable for been able to induct their normal counterpart to assume the pathological configuration on a kind of chain reaction, with the possibility of trasmission between subjects and even through different species. Prions can cause a series of neurodegenerative disorders affecting humans (Creutzfeldt-Jakob disease, Gerstmann-Straussler-Scheinker syndrome, fatal familial insomnia, kuru), and animals such cattle (bovine spongiform encephalopathy or “mad cow disease”), deer (chronic wasting disease) and sheep (scrapie). This article is a non-systematic review, obtained on PubMed, SciELO and Google Scholar databases, with the aim to give a general view about the nature of prions, followed by a brief discussion of the human diseases caused by prions.

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