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Colorectal cancer cells display chaperone dependency for the unconventional prefoldin URI1
Chaperone dependency of cancer cells is an emerging trait that relates to the need of transformed cells to cope with the various stresses associated with the malignant state. URI1 (unconventional prefoldin RPB5 interactor 1) encodes a member of the prefoldin (PFD) family of molecular chaperones that...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Impact Journals LLC
2016
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5045422/ https://www.ncbi.nlm.nih.gov/pubmed/27105489 http://dx.doi.org/10.18632/oncotarget.8816 |
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author | Lipinski, Kamil Andrzej Britschgi, Christian Schrader, Karen Christinat, Yann Frischknecht, Lukas Krek, Wilhelm |
author_facet | Lipinski, Kamil Andrzej Britschgi, Christian Schrader, Karen Christinat, Yann Frischknecht, Lukas Krek, Wilhelm |
author_sort | Lipinski, Kamil Andrzej |
collection | PubMed |
description | Chaperone dependency of cancer cells is an emerging trait that relates to the need of transformed cells to cope with the various stresses associated with the malignant state. URI1 (unconventional prefoldin RPB5 interactor 1) encodes a member of the prefoldin (PFD) family of molecular chaperones that acts as part of a heterohexameric PFD complex, the URI1 complex (URI1(C)), to promote assembly of multiprotein complexes involved in cell signaling and transcription processes. Here, we report that human colorectal cancer (CRCs) cell lines demonstrate differential dependency on URI1 and on the URI1 partner PFD STAP1 for survival, suggesting that this differential vulnerability of CRC cells is directly linked to URI1(C) chaperone function. Interestingly, in URI1-dependent CRC cells, URI1 deficiency is associated with non-genotoxic p53 activation and p53-dependent apoptosis. URI1-independent CRC cells do not exhibit such effects even in the context of wildtype p53. Lastly, in tumor xenografts, the conditional depletion of URI1 in URI1-dependent CRC cells was, after tumor establishment, associated with severe inhibition of subsequent tumor growth and activation of p53 target genes. Thus, a subset of CRC cells has acquired a dependency on the URI1 chaperone system for survival, providing an example of ‘non-oncogene addiction’ and vulnerability for therapeutic targeting. |
format | Online Article Text |
id | pubmed-5045422 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | Impact Journals LLC |
record_format | MEDLINE/PubMed |
spelling | pubmed-50454222016-10-13 Colorectal cancer cells display chaperone dependency for the unconventional prefoldin URI1 Lipinski, Kamil Andrzej Britschgi, Christian Schrader, Karen Christinat, Yann Frischknecht, Lukas Krek, Wilhelm Oncotarget Research Paper Chaperone dependency of cancer cells is an emerging trait that relates to the need of transformed cells to cope with the various stresses associated with the malignant state. URI1 (unconventional prefoldin RPB5 interactor 1) encodes a member of the prefoldin (PFD) family of molecular chaperones that acts as part of a heterohexameric PFD complex, the URI1 complex (URI1(C)), to promote assembly of multiprotein complexes involved in cell signaling and transcription processes. Here, we report that human colorectal cancer (CRCs) cell lines demonstrate differential dependency on URI1 and on the URI1 partner PFD STAP1 for survival, suggesting that this differential vulnerability of CRC cells is directly linked to URI1(C) chaperone function. Interestingly, in URI1-dependent CRC cells, URI1 deficiency is associated with non-genotoxic p53 activation and p53-dependent apoptosis. URI1-independent CRC cells do not exhibit such effects even in the context of wildtype p53. Lastly, in tumor xenografts, the conditional depletion of URI1 in URI1-dependent CRC cells was, after tumor establishment, associated with severe inhibition of subsequent tumor growth and activation of p53 target genes. Thus, a subset of CRC cells has acquired a dependency on the URI1 chaperone system for survival, providing an example of ‘non-oncogene addiction’ and vulnerability for therapeutic targeting. Impact Journals LLC 2016-04-18 /pmc/articles/PMC5045422/ /pubmed/27105489 http://dx.doi.org/10.18632/oncotarget.8816 Text en Copyright: © 2016 Lipinski et al. http://creativecommons.org/licenses/by/2.5/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. |
spellingShingle | Research Paper Lipinski, Kamil Andrzej Britschgi, Christian Schrader, Karen Christinat, Yann Frischknecht, Lukas Krek, Wilhelm Colorectal cancer cells display chaperone dependency for the unconventional prefoldin URI1 |
title | Colorectal cancer cells display chaperone dependency for the unconventional prefoldin URI1 |
title_full | Colorectal cancer cells display chaperone dependency for the unconventional prefoldin URI1 |
title_fullStr | Colorectal cancer cells display chaperone dependency for the unconventional prefoldin URI1 |
title_full_unstemmed | Colorectal cancer cells display chaperone dependency for the unconventional prefoldin URI1 |
title_short | Colorectal cancer cells display chaperone dependency for the unconventional prefoldin URI1 |
title_sort | colorectal cancer cells display chaperone dependency for the unconventional prefoldin uri1 |
topic | Research Paper |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5045422/ https://www.ncbi.nlm.nih.gov/pubmed/27105489 http://dx.doi.org/10.18632/oncotarget.8816 |
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