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García-Barros M, Coant N, Kawamori T, Wada M, Snider AJ, Truman JP, Wu BX, Furuya H, Clarke CJ, Bialkowska AB, Ghaleb A, Yang VW, Obeid LM, Hannun YA. Role of neutral ceramidase in colon cancer. FASEB J 2016; 30:4159-4171. [PMID: 27609772 DOI: 10.1096/fj.201600611r] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2016] [Accepted: 08/22/2016] [Indexed: 12/12/2022]
Abstract
Alterations in sphingolipid metabolism, especially ceramide and sphingosine 1-phosphate, have been linked to colon cancer, suggesting that enzymes of sphingolipid metabolism may emerge as novel regulators and targets in colon cancer. Neutral ceramidase (nCDase), a key enzyme in sphingolipid metabolism that hydrolyzes ceramide into sphingosine, is highly expressed in the intestine; however, its role in colon cancer has not been defined. Here we show that molecular and pharmacological inhibition of nCDase in colon cancer cells increases ceramide, and this is accompanied by decreased cell survival and increased apoptosis and autophagy, with minimal effects on noncancerous cells. Inhibition of nCDase resulted in loss of β-catenin and inhibition of ERK, components of pathways relevant for colon cancer development. Furthermore, inhibition of nCDase in a xenograft model delayed tumor growth and increased ceramide while decreasing proliferation. It is noteworthy that mice lacking nCDase treated with azoxymethane were protected from tumor formation. Taken together, these studies show that nCDase is pivotal for regulating initiation and development of colon cancer, and these data suggest that this enzyme is a suitable and novel target for colon cancer therapy.-García-Barros, M., Coant, N., Kawamori, T., Wada, M., Snider, A. J., Truman, J.-P., Wu, B. X., Furuya, H., Clarke, C. J., Bialkowska, A. B., Ghaleb, A., Yang, V. W., Obeid, L. M., Hannun, Y. A. Role of neutral ceramidase in colon cancer.
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Affiliation(s)
- Mónica García-Barros
- Department of Medicine, Stony Brook University, New York, USA.,Stony Brook Cancer Center, Stony Brook University, Stony Brook, New York, USA
| | - Nicolas Coant
- Department of Medicine, Stony Brook University, New York, USA.,Stony Brook Cancer Center, Stony Brook University, Stony Brook, New York, USA
| | - Toshihiko Kawamori
- Cancer Biology Program, University of Hawaii Cancer Center, Honolulu, Hawaii, USA.,Research Institute for Cancer Prevention and Pathologic Diagnosis at Tokyo Leon Clinics, Nagoya, Japan
| | - Masayuki Wada
- Department of Medicine, Stony Brook University, New York, USA.,Stony Brook Cancer Center, Stony Brook University, Stony Brook, New York, USA
| | - Ashley J Snider
- Department of Medicine, Stony Brook University, New York, USA.,Stony Brook Cancer Center, Stony Brook University, Stony Brook, New York, USA.,Northport Veterans Affairs Medical Center, Northport, New York, USA
| | - Jean-Philip Truman
- Department of Medicine, Stony Brook University, New York, USA.,Stony Brook Cancer Center, Stony Brook University, Stony Brook, New York, USA
| | - Bill X Wu
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, South Carolina, USA
| | - Hideki Furuya
- Cancer Biology Program, University of Hawaii Cancer Center, Honolulu, Hawaii, USA
| | - Christopher J Clarke
- Department of Medicine, Stony Brook University, New York, USA.,Stony Brook Cancer Center, Stony Brook University, Stony Brook, New York, USA
| | | | - Amr Ghaleb
- Department of Medicine, Stony Brook University, New York, USA
| | - Vincent W Yang
- Department of Medicine, Stony Brook University, New York, USA
| | - Lina M Obeid
- Department of Medicine, Stony Brook University, New York, USA.,Stony Brook Cancer Center, Stony Brook University, Stony Brook, New York, USA.,Northport Veterans Affairs Medical Center, Northport, New York, USA
| | - Yusuf A Hannun
- Department of Medicine, Stony Brook University, New York, USA; .,Stony Brook Cancer Center, Stony Brook University, Stony Brook, New York, USA.,Department of Biochemistry, Stony Brook University, Stony Brook, New York, USA.,Department of Pharmacology, Stony Brook University, Stony Brook, New York, USA; and.,Department of Pathology, Stony Brook University, Stony Brook, New York, USA
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