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- W4309189242 abstract "Abstract Pancreatic ductal adenocarcinomas (PDAC) depend on autophagy for survival; however, the metabolic substrates that autophagy provides to drive PDAC progression are unclear. Ferritin, the cellular iron storage complex, is targeted for lysosomal degradation (ferritinophagy) by the selective autophagy adaptor Nuclear receptor coactivator 4 (NCOA4), resulting in release of iron for cellular utilization. Using patient-derived and genetically engineered murine models of PDAC we now demonstrate that ferritinophagy is upregulated in PDAC to sustain iron availability thereby promoting tumor progression. Mass spectrometry-based quantitative proteomics reveals that ferritinophagy fuels iron-sulfur cluster protein synthesis to support mitochondrial homeostasis. Targeting NCOA4 leads to tumor growth delay and prolonged survival but with development of compensatory iron acquisition pathways. Finally, enhanced ferritinophagy accelerates PDAC tumorigenesis, and an elevated ferritinophagy expression signature predicts for poor prognosis in PDAC patients. Together, our data reveal that maintenance of iron homeostasis is a critical function of PDAC autophagy, and we define NCOA4-mediated ferritinophagy as a therapeutic target in PDAC. Citation Format: Naiara Santana-Codina, Huan Zhang, Maria Quiles del Rey, Kevin S. Kapner, Ajami Gikandi, Callum Malcolm, Clara Poupault, Miljan Kuljanin, Kristen John, Douglas E. Biancur, Brandon Chen, Nupur Das, Kristen Lowder, Connor J. Hennessey, Wesley Huang, Annan Yang, Yatrik M. Shah, Jonathan A. Nowak, Andrew J. Aguirre, Joseph D. Mancias. NCOA4-mediated ferritinophagy is a pancreatic cancer dependency via maintenance of iron bioavailability for iron-sulfur cluster proteins [abstract]. In: Proceedings of the AACR Special Conference on Pancreatic Cancer; 2022 Sep 13-16; Boston, MA. Philadelphia (PA): AACR; Cancer Res 2022;82(22 Suppl):Abstract nr A075." @default.
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- W4309189242 date "2022-11-15" @default.
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- W4309189242 title "Abstract A075: NCOA4-mediated ferritinophagy is a pancreatic cancer dependency via maintenance of iron bioavailability for iron-sulfur cluster proteins" @default.
- W4309189242 doi "https://doi.org/10.1158/1538-7445.panca22-a075" @default.
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