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scrapie/carbohydrate
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A potential blood test for transmissible spongiform encephalopathies by detecting carbohydrate-dependent aggregates of PrPres-like proteins in scrapie-Infected hamster plasma.
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PrPres has rarely been detected in blood (except in leukocytes) even in diseased animal models that are known to contain a large amount of PrPres in infected tissues. It seems likely that PrPres detection in blood is difficult because of the low titer of infectious material within the blood. Here,
Specific proteins associated with Creutzfeldt-Jakob disease and scrapie share antigenic and carbohydrate determinants.
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Small amounts of brain tissue (2 g) infected with Creutzfeldt-Jakob disease (CJD) can be fractionated by using a simple 1-day method that includes lysis with N-lauroylsarcosine. Unique fibrils have been identified previously in scrapie- and CJD-infected tissue. These fibrils were abundant in final
Molecular changes of preclinical scrapie can be detected by infrared spectroscopy.
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Infrared (IR) microspectroscopy was used to detect disease-associated molecular changes spatially resolved in cryosections of scrapie-infected tissue of the CNS. The results show that IR spectra can be used for the discrimination between normal and 263K scrapie-infected hamster nervous tissue not
Differential glycosylation of the protein (PrP) forming scrapie-associated fibrils.
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PrP is a glycoprotein found in normal brain. In brain affected by scrapie it forms scrapie-associated fibrils (SAF). PrP from SAF shows considerable heterogeneity of size and charge on two-dimensional gels. It separates into six major regions, the three more acidic regions arising as a result of
Influence of surface functionality of poly(propylene imine) dendrimers on protease resistance and propagation of the scrapie prion protein.
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Accumulation of PrP(Sc), an insoluble and protease-resistant pathogenic isoform of the cellular prion protein (PrP(C)), is a hallmark in prion diseases. Branched polyamines, including PPI (poly(propylene imine)) dendrimers, are able to remove protease resistant PrP(Sc) and abolish infectivity,
The protein component of scrapie-associated fibrils is a glycosylated low molecular weight protein.
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Scrapie-associated fibril protein (SAF-protein) extracted from infectious scrapie-associated fibrils (SAF) isolated from scrapie hamster brains is not infectious. SAF-protein is composed of various mol. wt. species of glycoproteins differing in carbohydrate content rather than amino acid
Glycan-controlled epitopes of prion protein include a major determinant of susceptibility to sheep scrapie.
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A key feature of prion encephalopathies is the accumulation of a misfolded form of the host glycoprotein PrP. Cell-free and cell culture studies have shown that the efficiency of conversion of PrP into the disease-associated form is influenced by its amino acid sequence and also by its carbohydrate
Detection of pathological molecular alterations in scrapie-infected hamster brain by Fourier transform infrared (FT-IR) spectroscopy.
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In this report a new approach for the identification of pathological changes in scrapie-infected Syrian hamster brains using Fourier transform infrared microspectroscopy is discussed. Using computer-based pattern recognition techniques and imaging, infrared maps with high structural contrast were
10E4 antigen of Scrapie lesions contains an unusual nonsulfated heparan motif.
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The carbohydrate antigen on heparan sulfate recognized by monoclonal antibody 10E4 is uniquely codistributed with the abnormal prion protein, PrP(Sc), even in the earliest detectable brain lesions of scrapie-infected mice. Determining the chemical structure of 10E4 antigen is, therefore, an
Scrapie PrP 27-30 is a sialoglycoprotein.
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The major scrapie prion protein, designated PrP 27-30, exhibited both charge and size heterogeneity after purification from infected hamster brains. Eight or more discrete charge isomers of PrP 27-30 with isoelectric points ranging from approximately pH 4.6 to 7.9 were found by using non-equilibrium
Altered glycosylated PrP proteins can have different neuronal trafficking in brain but do not acquire scrapie-like properties.
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N-Linked glycans have been shown to have an important role in the cell biology of a variety of cell surface glycoproteins, including PrP protein. It has been suggested that glycosylation of PrP can influence the susceptibility to transmissible spongiform encephalopathy and determine the
Intracellular accumulation of the cellular prion protein after mutagenesis of its Asn-linked glycosylation sites.
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The cellular isoform of the prion protein (PrPC) is a sialoglycoprotein bound almost exclusively on the external surface of the plasma membrane by a glycosyl phosphatidylinositol anchor. The deduced amino acid sequence of Syrian hamster PrPC identifies two potential sites for the addition of
A variable concept for the preparation of branched glycosyl phosphatidyl inositol anchors.
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A variable concept for the synthesis of branched glycosyl phosphatidyl inositol (GPI) anchors was established. Its efficiency could be shown by the successful synthesis of the GPI anchor of rat brain Thy-1 and of the scrapie prion protein both in the water soluble 1c and lipidated form 1a.
Epitope mapping of the Syrian hamster prion protein utilizing chimeric and mutant genes in a vaccinia virus expression system.
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The cellular prion protein (PrPc) is a host-encoded sialoglycoprotein bound to the external surface of the cell membrane by a glycosyl phosphatidylinositol anchor. A posttranslationally modified PrP isoform (PrPSc) is a component of the infectious particle causing scrapie and the other prion
Role of the 37 kDa laminin receptor precursor in the life cycle of prions.
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Prions are thought to consist of infectious proteins that cause, in the absence of detectable nucleic acid, a group of fatal neurodegenerative diseases, called transmissible spongiform encephalopathies (TSE). Among these diseases are bovine spongiform encephalopathy (BSE), scrapie of sheep and
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