Human Tonsil-Derived Follicular Dendritic-Like Cells are Refractory to Human Prion Infection in Vitro and Traffic Disease-Associated Prion Protein to Lysosomes
| Autor: | James W. Ironside, Mark Head, Zuzana Krejciova, Jean Manson, Paul A. De Sousa |
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| Rok vydání: | 2014 |
| Předmět: |
PrPSc Proteins
Short Communication animal diseases Palatine Tonsil Fluorescent Antibody Technique Disease Biology Creutzfeldt-Jakob Syndrome Cell Line Pathology and Forensic Medicine mental disorders Follicular phase medicine Humans Prion protein Microscopy Confocal Colocalization Virology In vitro nervous system diseases Cell biology Staining medicine.anatomical_structure Cell culture Tonsil Lysosomes Dendritic Cells Follicular |
| Zdroj: | Krejciova, Z, De Sousa, P, Manson, J, Ironside, J W & Head, M W 2014, ' Human Tonsil-Derived Follicular Dendritic-Like Cells are Refractory to Human Prion Infection in Vitro and Traffic Disease-Associated Prion Protein to Lysosomes ', American Journal of Pathology, vol. 184, no. 1, pp. 64-70 . https://doi.org/10.1016/j.ajpath.2013.09.013 |
| ISSN: | 0002-9440 |
| Popis: | The molecular mechanisms involved in human cellular susceptibility to prion infection remain poorly defined. This is due, in part, to the absence of any well characterized and relevant cultured human cells susceptible to infection with human prions, such as those involved in Creutzfeldt-Jakob disease. In variant Creutzfeldt-Jakob disease, prion replication is thought to occur first in the lymphoreticular system and then spread into the brain. We have, therefore, examined the susceptibility of a human tonsil-derived follicular dendritic cell-like cell line (HK) to prion infection. HK cells were found to display a readily detectable, time-dependent increase in cell-associated abnormal prion protein (PrP(TSE)) when exposed to medium spiked with Creutzfeldt-Jakob disease brain homogenate, resulting in a coarse granular perinuclear PrP(TSE) staining pattern. Despite their high level of cellular prion protein expression, HK cells failed to support infection, as judged by longer term maintenance of PrP(TSE) accumulation. Colocalization studies revealed that exposure of HK cells to brain homogenate resulted in increased numbers of detectable lysosomes and that these structures immunostained intensely for PrP(TSE) after exposure to Creutzfeldt-Jakob disease brain homogenate. Our data suggest that human follicular dendritic-like cells and perhaps other human cell types are able to avoid prion infection by efficient lysosomal degradation of PrP(TSE). |
| Databáze: | OpenAIRE |
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