Abstract
During the last thirty years, part of the scientific community focused on the mechanisms by which a naturally occurring protein called cellular prion (PrPc) converts into a protease-resistant isoform (PrPsc) responsible for fatal Transmissible Spongiform Encephalopathies (TSE). Concomitantly, the physiology of PrPc has also been studied. PrPc undergoes proteolytic attacks leading to both membrane-attached and secreted fragments, the nature of which differs in normal and TSE-affected human brains. Does proteolysis of PrPc correspond to an inactivating mechanism impairing the biological function of the protein, or alternatively, does it represent a maturation process allowing the produced fragments to trigger their own physiological function? Here we review the mechanisms involved in the production of PrPc catabolites and we focus on the function of PrPc and its derived fragments in the cell death/ survival regulation in the nervous system.
Keywords: ADAM, α-secretase-derived fragments, apoptosis, βAPP, cellular Prion protein, neuroprotection, p53, PRNP gene, infectious agent, Creutzfeld-Jacob Disease, synthetic peptide, proteolysis, neurodegeneration, brain pathologies, amyloid plaques
Current Molecular Medicine
Title: Cellular Prion and its Catabolites in the Brain: Production and Function
Volume: 12 Issue: 3
Author(s): M.-V. Guillot-Sestier and F. Checler
Affiliation:
Keywords: ADAM, α-secretase-derived fragments, apoptosis, βAPP, cellular Prion protein, neuroprotection, p53, PRNP gene, infectious agent, Creutzfeld-Jacob Disease, synthetic peptide, proteolysis, neurodegeneration, brain pathologies, amyloid plaques
Abstract: During the last thirty years, part of the scientific community focused on the mechanisms by which a naturally occurring protein called cellular prion (PrPc) converts into a protease-resistant isoform (PrPsc) responsible for fatal Transmissible Spongiform Encephalopathies (TSE). Concomitantly, the physiology of PrPc has also been studied. PrPc undergoes proteolytic attacks leading to both membrane-attached and secreted fragments, the nature of which differs in normal and TSE-affected human brains. Does proteolysis of PrPc correspond to an inactivating mechanism impairing the biological function of the protein, or alternatively, does it represent a maturation process allowing the produced fragments to trigger their own physiological function? Here we review the mechanisms involved in the production of PrPc catabolites and we focus on the function of PrPc and its derived fragments in the cell death/ survival regulation in the nervous system.
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Cite this article as:
Guillot-Sestier M.-V. and Checler F., Cellular Prion and its Catabolites in the Brain: Production and Function, Current Molecular Medicine 2012; 12 (3) . https://dx.doi.org/10.2174/156652412799218912
DOI https://dx.doi.org/10.2174/156652412799218912 |
Print ISSN 1566-5240 |
Publisher Name Bentham Science Publisher |
Online ISSN 1875-5666 |
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