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Overcoming MITF-conferred drug resistance through dual AURKA/MAPK targeting in human melanoma cells
MITF (microphthalmia-associated transcription factor) is a frequently amplified lineage-specific oncogene in human melanoma, whose role in intrinsic drug resistance has not been systematically investigated. Utilizing chemical inhibitors for major signaling pathways/cellular processes, we witness MIT...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2016
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4823922/ https://www.ncbi.nlm.nih.gov/pubmed/26962685 http://dx.doi.org/10.1038/cddis.2015.369 |
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author | Pathria, G Garg, B Borgdorff, V Garg, K Wagner, C Superti-Furga, G Wagner, S N |
author_facet | Pathria, G Garg, B Borgdorff, V Garg, K Wagner, C Superti-Furga, G Wagner, S N |
author_sort | Pathria, G |
collection | PubMed |
description | MITF (microphthalmia-associated transcription factor) is a frequently amplified lineage-specific oncogene in human melanoma, whose role in intrinsic drug resistance has not been systematically investigated. Utilizing chemical inhibitors for major signaling pathways/cellular processes, we witness MITF as an elicitor of intrinsic drug resistance. To search kinase(s) targets able to bypass MITF-conferred drug resistance, we employed a multi-kinase inhibitor-directed chemical proteomics-based differential affinity screen in human melanocytes carrying ectopic MITF overexpression. A subsequent methodical interrogation informed mitotic Ser/Thr kinase Aurora Kinase A (AURKA) as a crucial regulator of melanoma cell proliferation and migration, independent of the underlying molecular alterations, including TP53 functional status and MITF levels. Crucially, assessing the efficacy of investigational AURKA inhibitor MLN8237, we pre-emptively witness the procurement of a molecular program consistent with acquired drug resistance. This involved induction of multiple MAPK (mitogen-activated protein kinase) signaling pathway components and their downstream proliferation effectors (Cyclin D1 and c-JUN) and apoptotic regulators (MITF and Bcl-2). A concomitant AURKA/BRAF and AURKA/MEK targeting overcame MAPK signaling activation-associated resistance signature in BRAF- and NRAS-mutated melanomas, respectively, and elicited heightened anti-proliferative activity and apoptotic cell death. These findings reveal a previously unreported MAPK signaling-mediated mechanism of immediate resistance to AURKA inhibitors. These findings could bear significant implications for the application and the success of anti-AURKA approaches that have already entered phase-II clinical trials for human melanoma. |
format | Online Article Text |
id | pubmed-4823922 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-48239222016-04-21 Overcoming MITF-conferred drug resistance through dual AURKA/MAPK targeting in human melanoma cells Pathria, G Garg, B Borgdorff, V Garg, K Wagner, C Superti-Furga, G Wagner, S N Cell Death Dis Original Article MITF (microphthalmia-associated transcription factor) is a frequently amplified lineage-specific oncogene in human melanoma, whose role in intrinsic drug resistance has not been systematically investigated. Utilizing chemical inhibitors for major signaling pathways/cellular processes, we witness MITF as an elicitor of intrinsic drug resistance. To search kinase(s) targets able to bypass MITF-conferred drug resistance, we employed a multi-kinase inhibitor-directed chemical proteomics-based differential affinity screen in human melanocytes carrying ectopic MITF overexpression. A subsequent methodical interrogation informed mitotic Ser/Thr kinase Aurora Kinase A (AURKA) as a crucial regulator of melanoma cell proliferation and migration, independent of the underlying molecular alterations, including TP53 functional status and MITF levels. Crucially, assessing the efficacy of investigational AURKA inhibitor MLN8237, we pre-emptively witness the procurement of a molecular program consistent with acquired drug resistance. This involved induction of multiple MAPK (mitogen-activated protein kinase) signaling pathway components and their downstream proliferation effectors (Cyclin D1 and c-JUN) and apoptotic regulators (MITF and Bcl-2). A concomitant AURKA/BRAF and AURKA/MEK targeting overcame MAPK signaling activation-associated resistance signature in BRAF- and NRAS-mutated melanomas, respectively, and elicited heightened anti-proliferative activity and apoptotic cell death. These findings reveal a previously unreported MAPK signaling-mediated mechanism of immediate resistance to AURKA inhibitors. These findings could bear significant implications for the application and the success of anti-AURKA approaches that have already entered phase-II clinical trials for human melanoma. Nature Publishing Group 2016-03 2016-03-10 /pmc/articles/PMC4823922/ /pubmed/26962685 http://dx.doi.org/10.1038/cddis.2015.369 Text en Copyright © 2016 Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ Cell Death and Disease is an open-access journal published by Nature Publishing Group. This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
spellingShingle | Original Article Pathria, G Garg, B Borgdorff, V Garg, K Wagner, C Superti-Furga, G Wagner, S N Overcoming MITF-conferred drug resistance through dual AURKA/MAPK targeting in human melanoma cells |
title | Overcoming MITF-conferred drug resistance through dual AURKA/MAPK targeting in human melanoma cells |
title_full | Overcoming MITF-conferred drug resistance through dual AURKA/MAPK targeting in human melanoma cells |
title_fullStr | Overcoming MITF-conferred drug resistance through dual AURKA/MAPK targeting in human melanoma cells |
title_full_unstemmed | Overcoming MITF-conferred drug resistance through dual AURKA/MAPK targeting in human melanoma cells |
title_short | Overcoming MITF-conferred drug resistance through dual AURKA/MAPK targeting in human melanoma cells |
title_sort | overcoming mitf-conferred drug resistance through dual aurka/mapk targeting in human melanoma cells |
topic | Original Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4823922/ https://www.ncbi.nlm.nih.gov/pubmed/26962685 http://dx.doi.org/10.1038/cddis.2015.369 |
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