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Nagarajan A, Dogra SK, Sun L, Gandotra N, Ho T, Cai G, Cline G, Kumar P, Cowles RA, Wajapeyee N. Paraoxonase 2 Facilitates Pancreatic Cancer Growth and Metastasis by Stimulating GLUT1-Mediated Glucose Transport. Mol Cell 2017; 67:685-701.e6. [PMID: 28803777 DOI: 10.1016/j.molcel.2017.07.014] [Citation(s) in RCA: 101] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2017] [Revised: 06/07/2017] [Accepted: 07/11/2017] [Indexed: 12/28/2022]
Abstract
Metabolic deregulation is a hallmark of human cancers, and the glycolytic and glutamine metabolism pathways were shown to be deregulated in pancreatic ductal adenocarcinoma (PDAC). To identify new metabolic regulators of PDAC tumor growth and metastasis, we systematically knocked down metabolic genes that were overexpressed in human PDAC tumor samples using short hairpin RNAs. We found that p53 transcriptionally represses paraoxonase 2 (PON2), which regulates GLUT1-mediated glucose transport via stomatin. The loss of PON2 initiates the cellular starvation response and activates AMP-activated protein kinase (AMPK). In turn, AMPK activates FOXO3A and its transcriptional target, PUMA, which induces anoikis to suppress PDAC tumor growth and metastasis. Pharmacological or genetic activation of AMPK, similar to PON2 inhibition, blocks PDAC tumor growth. Collectively, our results identify PON2 as a new modulator of glucose transport that regulates a pharmacologically tractable pathway necessary for PDAC tumor growth and metastasis.
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Affiliation(s)
- Arvindhan Nagarajan
- Department of Pathology, Yale University School of Medicine, New Haven, CT 06510, USA
| | - Shaillay Kumar Dogra
- Singapore Institute of Clinical Sciences, Agency for Science Technology and Research (A(∗)STAR), Brenner Center for Molecular Medicine, Singapore 117609, Singapore
| | - Lisha Sun
- Department of Pathology, Yale University School of Medicine, New Haven, CT 06510, USA
| | - Neeru Gandotra
- Department of Surgery, Yale University School of Medicine, New Haven, CT 06510, USA
| | - Thuy Ho
- Department of Pathology, Yale University School of Medicine, New Haven, CT 06510, USA
| | - Guoping Cai
- Department of Pathology, Yale University School of Medicine, New Haven, CT 06510, USA
| | - Gary Cline
- Department of Internal Medicine, Yale University School of Medicine, New Haven, CT 06510, USA
| | - Priti Kumar
- Department of Internal Medicine and Microbial Pathogenesis, Yale University School of Medicine, New Haven, CT 06510, USA
| | - Robert A Cowles
- Department of Surgery, Yale University School of Medicine, New Haven, CT 06510, USA
| | - Narendra Wajapeyee
- Department of Pathology, Yale University School of Medicine, New Haven, CT 06510, USA.
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