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Prion diseases characterize a category of fatal neurodegenerative diseases. Although reports have increasingly shown that oxidative stress plays an important role in the progression of prion diseases, little is known about whether oxidative stress is a cause or a consequence of a prion disease. The mechanism of prion disease development also remains unclear. The purpose of this study was to investigate three things: the possible mechanisms of neuron cell damage, the conformation of anti-protease K (PK) PrP(Sc), and the role of oxidative stress in the progression of prion diseases. The study results demonstrated that normal PrP(C) transformed into a PK-resistant protein under oxidative stress in the presence of PrP106-126. Further, the protein misfolding cyclic amplification procedure may have accelerated this process. Mitochondrial damage and dysfunction in prion disease progression were also observed in this study. Our results suggested that neuron cell damage, and particularly mitochondrial damage, was induced by oxidative stress. This damage may be the initial cause of a given prion disease.

journal of molecular neuroscience

Cellular Prion Protein (PrPC) of the Neuron Cell Transformed to a PK-Resistant Protein Under Oxidative Stress, Comprising Main Mitochondrial Damage in Prion Diseases