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| Status |
Public on Feb 14, 2018 |
| Title |
ATF4 inhibition by p62 represses stromal metabolic reprogramming and tumorigenesis II |
| Organism |
Homo sapiens |
| Experiment type |
Expression profiling by high throughput sequencing
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| Summary |
Tumors often undergo stress and need to reprogram their metabolism to survive and grow under nutrient challenging conditions. The stroma could play a critical role in this process by providing nutrients or signals to support the epithelial compartment of the tumor. Autophagy has been shown to play key roles both in the stroma and in the epithelium. However, how autophagy adaptors, such as p62, participate in the mechanisms whereby the stroma supports tumor progression is not yet fully understood. Here we show that p62 deficiency in stromal fibroblasts promotes resistance to glutamine deprivation through a metabolic reprogramming orchestrated by the direct control of ATF4 stability by p62-mediated polyubiquitination. This, in turn, activates the flux of glucose carbons through a pyruvate carboxylase-asparagine synthase cascade that results in asparagine-mediated stromal cell growth and tumor epithelial proliferation, independent of autophagy. This supports a new model in which p62 directly targets nuclear transcription factors to control metabolic reprograming in the microenvironment to repress tumorigenesis, and emerges as global tumor suppressor.
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| Overall design |
WPMY sgC and sgp62 were cultured in No Glutamine, 10% dyalized FBS DMEM during 24h.
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| Contributor(s) |
Linares JF, Cordes T, Duran A, Reina-Campos M, Castilla EA, Moscat J, Metallo CM, Diaz-Meco MT |
| Citation(s) |
28988820 |
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| Submission date |
Feb 01, 2017 |
| Last update date |
Jul 07, 2022 |
| Contact name |
Jorge Moscat |
| E-mail(s) |
jom4010@med.cornell.edu
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| Organization name |
WEILL CORNELL MEDICINE
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| Department |
Pathology and Laboratory Medicine
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| Lab |
Moscat and Diaz-Meco
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| Street address |
1188 York Avenue
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| City |
New York |
| State/province |
NY |
| ZIP/Postal code |
10065 |
| Country |
USA |
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| Platforms (1) |
| GPL18573 |
Illumina NextSeq 500 (Homo sapiens) |
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| Samples (6)
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| Relations |
| BioProject |
PRJNA369512 |
| SRA |
SRP098683 |
| Supplementary file |
Size |
Download |
File type/resource |
| GSE94367_Processed_data_file_RNASeq_WPMY.xlsx |
1.2 Mb |
(ftp)(http) |
XLSX |
SRA Run Selector |
| Raw data are available in SRA |
| Processed data are available on Series record |
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