A forward genetic screen identifies modifiers of rocaglate responsiveness
Abstract Rocaglates are a class of eukaryotic translation initiation inhibitors that are being explored as chemotherapeutic agents. They function by targeting eukaryotic initiation factor (eIF) 4A, an RNA helicase critical for recruitment of the 40S ribosome (and associated factors) to mRNA template...
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Nature Portfolio
2021
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oai:doaj.org-article:8c4f9a7786f645b480c54ec87a7139b42021-12-02T17:25:33ZA forward genetic screen identifies modifiers of rocaglate responsiveness10.1038/s41598-021-97765-82045-2322https://doaj.org/article/8c4f9a7786f645b480c54ec87a7139b42021-09-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-97765-8https://doaj.org/toc/2045-2322Abstract Rocaglates are a class of eukaryotic translation initiation inhibitors that are being explored as chemotherapeutic agents. They function by targeting eukaryotic initiation factor (eIF) 4A, an RNA helicase critical for recruitment of the 40S ribosome (and associated factors) to mRNA templates. Rocaglates perturb eIF4A activity by imparting a gain-of-function activity to eIF4A and mediating clamping to RNA. To appreciate how rocaglates could best be enabled in the clinic, an understanding of resistance mechanisms is important, as this could inform on strategies to bypass such events as well as identify responsive tumor types. Here, we report on the results of a positive selection, ORFeome screen aimed at identifying cDNAs capable of conferring resistance to rocaglates. Two of the most potent modifiers of rocaglate response identified were the transcription factors FOXP3 and NR1I3, both of which have been implicated in ABCB1 regulation—the gene encoding P-glycoprotein (Pgp). Pgp has previously been implicated in conferring resistance to silvestrol, a naturally occurring rocaglate, and we show here that this extends to additional synthetic rocaglate derivatives. In addition, FOXP3 and NR1I3 impart a multi-drug resistant phenotype that is reversed upon inhibition of Pgp, suggesting a potential therapeutic combination strategy.Leo ShenLauren PugsleyRegina CencicHanChen WangFrancis RobertSai Kiran NaineniAnanya SahniGeneviève MorinWenhan ZhangAnastasia NijnikJohn A. PorcoDavid LanglaisSidong HuangJerry PelletierNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-13 (2021) |
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| topic |
Medicine R Science Q |
| spellingShingle |
Medicine R Science Q Leo Shen Lauren Pugsley Regina Cencic HanChen Wang Francis Robert Sai Kiran Naineni Ananya Sahni Geneviève Morin Wenhan Zhang Anastasia Nijnik John A. Porco David Langlais Sidong Huang Jerry Pelletier A forward genetic screen identifies modifiers of rocaglate responsiveness |
| description |
Abstract Rocaglates are a class of eukaryotic translation initiation inhibitors that are being explored as chemotherapeutic agents. They function by targeting eukaryotic initiation factor (eIF) 4A, an RNA helicase critical for recruitment of the 40S ribosome (and associated factors) to mRNA templates. Rocaglates perturb eIF4A activity by imparting a gain-of-function activity to eIF4A and mediating clamping to RNA. To appreciate how rocaglates could best be enabled in the clinic, an understanding of resistance mechanisms is important, as this could inform on strategies to bypass such events as well as identify responsive tumor types. Here, we report on the results of a positive selection, ORFeome screen aimed at identifying cDNAs capable of conferring resistance to rocaglates. Two of the most potent modifiers of rocaglate response identified were the transcription factors FOXP3 and NR1I3, both of which have been implicated in ABCB1 regulation—the gene encoding P-glycoprotein (Pgp). Pgp has previously been implicated in conferring resistance to silvestrol, a naturally occurring rocaglate, and we show here that this extends to additional synthetic rocaglate derivatives. In addition, FOXP3 and NR1I3 impart a multi-drug resistant phenotype that is reversed upon inhibition of Pgp, suggesting a potential therapeutic combination strategy. |
| format |
article |
| author |
Leo Shen Lauren Pugsley Regina Cencic HanChen Wang Francis Robert Sai Kiran Naineni Ananya Sahni Geneviève Morin Wenhan Zhang Anastasia Nijnik John A. Porco David Langlais Sidong Huang Jerry Pelletier |
| author_facet |
Leo Shen Lauren Pugsley Regina Cencic HanChen Wang Francis Robert Sai Kiran Naineni Ananya Sahni Geneviève Morin Wenhan Zhang Anastasia Nijnik John A. Porco David Langlais Sidong Huang Jerry Pelletier |
| author_sort |
Leo Shen |
| title |
A forward genetic screen identifies modifiers of rocaglate responsiveness |
| title_short |
A forward genetic screen identifies modifiers of rocaglate responsiveness |
| title_full |
A forward genetic screen identifies modifiers of rocaglate responsiveness |
| title_fullStr |
A forward genetic screen identifies modifiers of rocaglate responsiveness |
| title_full_unstemmed |
A forward genetic screen identifies modifiers of rocaglate responsiveness |
| title_sort |
forward genetic screen identifies modifiers of rocaglate responsiveness |
| publisher |
Nature Portfolio |
| publishDate |
2021 |
| url |
https://doaj.org/article/8c4f9a7786f645b480c54ec87a7139b4 |
| work_keys_str_mv |
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