H727 cells are inherently resistant to the proteasome inhibitor carfilzomib, yet require proteasome activity for cell survival and growth

Autor:	Ji Eun Park, Kyung Bo Kim, Zachary Miller, Deepak Bhattarai, Wooin Lee, Min Jae Lee
Jazyk:	angličtina
Rok vydání:	2019
Předmět:	0301 basic medicine Proteasome Endopeptidase Complex Cell Survival Cell lcsh:Medicine Antineoplastic Agents Apoptosis Drug resistance Article 03 medical and health sciences chemistry.chemical_compound 0302 clinical medicine Interferon Cell Line Tumor Neoplasms medicine Humans lcsh:Science Multiple myeloma Cell Proliferation Multidisciplinary lcsh:R medicine.disease Carfilzomib 3. Good health 030104 developmental biology medicine.anatomical_structure chemistry Proteasome Cell culture Drug Resistance Neoplasm Proteasome inhibitor Cancer research Quality of Life lcsh:Q Oligopeptides Proteasome Inhibitors 030217 neurology & neurosurgery medicine.drug
Zdroj:	Scientific Reports, Vol 9, Iss 1, Pp 1-9 (2019) Scientific Reports
ISSN:	2045-2322
Popis:	The second-in-class proteasome inhibitor (PI) carfilzomib (Kyprolis, Cfz) has contributed to a substantial advancement in multiple myeloma treatment by improving patient survival and quality of life. A considerable portion of patients however display intrinsic resistance to Cfz. Our mechanistic understanding of intrinsic Cfz resistance is limited due to a lack of suitable cell-based models. We report that H727 human bronchial carcinoid cells are inherently resistant to Cfz, yet susceptible to other PIs and inhibitors targeting upstream components of the ubiquitin-proteasome system (UPS). These results indicate that H727 cells remain dependent on the UPS for cell survival and growth despite harboring intrinsic resistance to Cfz. Alterations in the composition of proteasome catalytic subunits via interferon-γ treatment or siRNA knockdown results in sensitization of H727 cells to Cfz. We postulate that a potential link may exist between the composition of proteasome catalytic subunits and the cellular response to Cfz. Overall, H727 cells may serve as a useful cell-based model for de novo Cfz resistance and our results suggest previously unexplored mechanisms of de novo PI resistance.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e6b4355dff6d7ea00bbc7d981eb1005e http://link.springer.com/article/10.1038/s41598-019-40635-1 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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