Bailey Schmidt

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The prion protein PrPc is a glycoprotein of unknown function normally found in neurons and glia. It is involved in diseases such as bovine spongiform encephalopathy (BSE), scrapie and Creutzfeldt-Jakob disease. PrPSc, an altered isoform of PrPC that is associated with disease, shows greater protease resistance and is part of the infectious agent, the prion.(More)
The cellular function of the prion protein (PrPc), a cell surface glycoprotein expressed in neurones and astrocytes, has not been elucidated. Cell culture experiments reveal that cerebellar cells lacking PrPc are more sensitive to oxidative stress and undergo cell death more readily than wild-type cells. This effect is reversible by treatment with vitamin(More)
Human lumbar CSF patterns of Abeta peptides were analysed by urea-based beta-amyloid sodium dodecyl sulphate polyacrylamide gel electrophoresis with western immunoblot (Abeta-SDS-PAGE/immunoblot). A highly conserved pattern of carboxyterminally truncated Abeta1-37/38/39 was found in addition to Abeta1-40 and Abeta1-42. Remarkably, Abeta1-38 was present at a(More)
The prion protein is known to be a copper-binding protein, but affinity and stoichiometry data for the full-length protein at a physiological pH of 7 were lacking. Furthermore, it was unknown whether only the highly flexible N-terminal segment with its octarepeat region is involved in copper binding or whether the structured C-terminal domain is also(More)
Prion diseases are neurodegenerative transmissible diseases. The infectious agent, termed prion, is thought to consist of an altered host-encoded protein. The pathogenesis of these diseases which typically in a very short time lead to rampant nerve cell death and astrocytic gliosis is poorly understood. Investigations using the in situ endlabeling technique(More)
The N-terminal region of the prion protein (PrP) contains an octameric repeat region suggested to bind copper. A 32-amino acid peptide (PrPOcta) based on this region in the protein was tested for its effects on cultured cerebellar cells. Cerebellar cells from mice deficient in cellular PrP (Prnp0/0 mice) are more sensitive to copper toxicity and oxidative(More)
PC12 cells are known to express the prion protein, a normal cell surface glycoprotein. This protein is upregulated in PC12 cells differentiated with nerve growth factor. A neurotoxic prion protein peptide, PrP106-126, is not toxic to PC12 cells alone. PrP106-126 is toxic to PC12 cells co-cultured with microglia and more so to NGF-differentiated PC12 cells.(More)
Alzheimer's disease and prion diseases such as Creutzfeldt-Jakob disease are caused by as yet undefined metabolic disturbances of normal cellular proteins, the amyloid precursor protein and the prion protein (PrP). Synthetic fragments of both proteins, beta-amyloid 25-35 (betaA25-35) and PrP106-126, have been shown to be toxic to neurons in culture. Cell(More)
BACKGROUND Secreted protein acidic and rich in cysteine (SPARC) is a multi-faceted protein-modulating cell-cell and cell-matrix interactions. In cancer, SPARC can be not only associated with a highly aggressive phenotype, but also acts as a tumour suppressor. The aim of this study was to characterise the function of SPARC and its modulation by fibroblast(More)
An analog of lysophosphatidylcholine (1-dodecyl-propanediol-3-phosphocholine) which does not impair membrane-bound enzymes was used for the induction of shedding of membrane vesicles from intact calf thymocytes. Without liberation of intracellular enzymes such as lactate dehydrogenase (EC 1.1.1.27) the shedded membranes contained 15--25% of the total(More)