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Linzer RW, Guida DL, Aminov J, Snider JM, Khalife G, Buyukbayraktar AB, Alhaddad C, Resnick AE, Wang P, Pan CH, Allopenna JJ, Clarke CJ. Dihydroceramide desaturase 1 (DES1) promotes anchorage-independent survival downstream of HER2-driven glucose uptake and metabolism. FASEB J 2022; 36:e22558. [PMID: 36165222 PMCID: PMC9597949 DOI: 10.1096/fj.202200748r] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Revised: 08/03/2022] [Accepted: 09/07/2022] [Indexed: 11/11/2022]
Abstract
Oncogenic reprogramming of cellular metabolism is a hallmark of many cancers, but our mechanistic understanding of how such dysregulation is linked to tumor behavior remains poor. In this study, we have identified dihydroceramide desaturase (DES1)-which catalyzes the last step in de novo sphingolipid synthesis-as necessary for the acquisition of anchorage-independent survival (AIS), a key cancer enabling biology, and establish DES1 as a downstream effector of HER2-driven glucose uptake and metabolism. We further show that DES1 is sufficient to drive AIS and in vitro tumorigenicity and that increased DES1 levels-found in a third of HER2+ breast cancers-are associated with worse survival outcomes. Taken together, our findings reveal a novel pro-tumor role for DES1 as a transducer of HER2-driven glucose metabolic signals and provide evidence that targeting DES1 is an effective approach for overcoming AIS. Results further suggest that DES1 may have utility as a biomarker of aggressive and metastasis-prone HER2+ breast cancer.
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Affiliation(s)
- Ryan W Linzer
- Department of Medicine and the Cancer Center, Stony Brook University, Stony Brook, NY, USA
| | - Danielle L Guida
- Department of Medicine and the Cancer Center, Stony Brook University, Stony Brook, NY, USA
| | - Jonathan Aminov
- Department of Medicine and the Cancer Center, Stony Brook University, Stony Brook, NY, USA
| | - Justin M Snider
- Department of Medicine and the Cancer Center, Stony Brook University, Stony Brook, NY, USA
| | - Gabrielle Khalife
- Department of Medicine and the Cancer Center, Stony Brook University, Stony Brook, NY, USA
| | - A Burak Buyukbayraktar
- Department of Medicine and the Cancer Center, Stony Brook University, Stony Brook, NY, USA
| | - Charbel Alhaddad
- Department of Medicine and the Cancer Center, Stony Brook University, Stony Brook, NY, USA
| | - Andrew E Resnick
- Department of Medicine and the Cancer Center, Stony Brook University, Stony Brook, NY, USA
| | - Pule Wang
- Department of Medicine and the Cancer Center, Stony Brook University, Stony Brook, NY, USA
| | - Chun-Hao Pan
- Department of Medicine and the Cancer Center, Stony Brook University, Stony Brook, NY, USA
| | - Janet J Allopenna
- Department of Medicine and the Cancer Center, Stony Brook University, Stony Brook, NY, USA
| | - Christopher J Clarke
- Department of Medicine and the Cancer Center, Stony Brook University, Stony Brook, NY, USA
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Senkal CE, Salama MF, Snider AJ, Allopenna JJ, Rana NA, Koller A, Hannun YA, Obeid LM. Ceramide Is Metabolized to Acylceramide and Stored in Lipid Droplets. Cell Metab 2017; 25:686-697. [PMID: 28273483 PMCID: PMC5472424 DOI: 10.1016/j.cmet.2017.02.010] [Citation(s) in RCA: 137] [Impact Index Per Article: 19.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/10/2016] [Revised: 11/22/2016] [Accepted: 02/16/2017] [Indexed: 12/26/2022]
Abstract
In an approach aimed at defining interacting partners of ceramide synthases (CerSs), we found that fatty acyl-CoA synthase ACSL5 interacts with all CerSs. We demonstrate that ACSL5-generated FA-CoA was utilized with de novo ceramide for the generation of acylceramides, poorly studied ceramide metabolites. Functionally, inhibition of ceramide channeling to acylceramide enhanced accumulation of de novo ceramide and resulted in augmentation of ceramide-mediated apoptosis. Mechanistically, we show that acylceramide generation is catalyzed by diacylglycerol acyltransferase 2 (DGAT2) on lipid droplets. In summary, this study identifies a metabolic pathway of acylceramide generation and its sequestration in LDs in cells and in livers of mice on a high-fat diet. The study also implicates this pathway in ceramide-mediated apoptosis, and has implications in co-regulation of triglyceride and sphingolipid metabolisms.
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Affiliation(s)
- Can E Senkal
- Department of Medicine, Stony Brook University, Stony Brook, NY 11794, USA; Stony Brook Cancer Center, Stony Brook University, Stony Brook, NY 11794, USA
| | - Mohamed F Salama
- Department of Medicine, Stony Brook University, Stony Brook, NY 11794, USA; Department of Biochemistry, Faculty of Veterinary Medicine, Mansoura University, Mansoura, Dakahlia Governorate 35516, Egypt
| | - Ashley J Snider
- Department of Medicine, Stony Brook University, Stony Brook, NY 11794, USA; Stony Brook Cancer Center, Stony Brook University, Stony Brook, NY 11794, USA; Northport Veterans Affairs Medical Center, Northport, NY 11768, USA
| | - Janet J Allopenna
- Department of Medicine, Stony Brook University, Stony Brook, NY 11794, USA
| | - Nadia A Rana
- Department of Medicine, Stony Brook University, Stony Brook, NY 11794, USA
| | - Antonius Koller
- Proteomics Center, Stony Brook University, Stony Brook, NY 11794, USA
| | - Yusuf A Hannun
- Department of Medicine, Stony Brook University, Stony Brook, NY 11794, USA; Stony Brook Cancer Center, Stony Brook University, Stony Brook, NY 11794, USA
| | - Lina M Obeid
- Department of Medicine, Stony Brook University, Stony Brook, NY 11794, USA; Stony Brook Cancer Center, Stony Brook University, Stony Brook, NY 11794, USA; Northport Veterans Affairs Medical Center, Northport, NY 11768, USA.
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