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Marczyk M, Gunasekharan V, Casadevall D, Qing T, Foldi J, Sehgal R, Shan NL, Blenman KRM, O'Meara TA, Umlauf S, Surovtseva YV, Muthusamy V, Rinehart J, Perry RJ, Kibbey R, Hatzis C, Pusztai L. Comprehensive Analysis of Metabolic Isozyme Targets in Cancer. Cancer Res 2022; 82:1698-1711. [PMID: 35247885 PMCID: PMC10883296 DOI: 10.1158/0008-5472.can-21-3983] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Revised: 02/07/2022] [Accepted: 02/21/2022] [Indexed: 11/16/2022]
Abstract
Metabolic reprogramming is a hallmark of malignant transformation, and loss of isozyme diversity (LID) contributes to this process. Isozymes are distinct proteins that catalyze the same enzymatic reaction but can have different kinetic characteristics, subcellular localization, and tissue specificity. Cancer-dominant isozymes that catalyze rate-limiting reactions in critical metabolic processes represent potential therapeutic targets. Here, we examined the isozyme expression patterns of 1,319 enzymatic reactions in 14 cancer types and their matching normal tissues using The Cancer Genome Atlas mRNA expression data to identify isozymes that become cancer-dominant. Of the reactions analyzed, 357 demonstrated LID in at least one cancer type. Assessment of the expression patterns in over 600 cell lines in the Cancer Cell Line Encyclopedia showed that these reactions reflect cellular changes instead of differences in tissue composition; 50% of the LID-affected isozymes showed cancer-dominant expression in the corresponding cell lines. The functional importance of the cancer-dominant isozymes was assessed in genome-wide CRISPR and RNAi loss-of-function screens: 17% were critical for cell proliferation, indicating their potential as therapeutic targets. Lists of prioritized novel metabolic targets were developed for 14 cancer types; the most broadly shared and functionally validated target was acetyl-CoA carboxylase 1 (ACC1). Small molecule inhibition of ACC reduced breast cancer viability in vitro and suppressed tumor growth in cell line- and patient-derived xenografts in vivo. Evaluation of the effects of drug treatment revealed significant metabolic and transcriptional perturbations. Overall, this systematic analysis of isozyme expression patterns elucidates an important aspect of cancer metabolic plasticity and reveals putative metabolic vulnerabilities. SIGNIFICANCE This study exploits the loss of metabolic isozyme diversity common in cancer and reveals a rich pool of potential therapeutic targets that will allow the repurposing of existing inhibitors for anticancer therapy. See related commentary by Kehinde and Parker, p. 1695.
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Affiliation(s)
- Michal Marczyk
- Yale Cancer Center, Yale School of Medicine, New Haven, Connecticut
- Department of Data Science and Engineering, Silesian University of Technology, Gliwice, Poland
| | | | - David Casadevall
- Cancer Research Program, Hospital del Mar Research Institute (IMIM), Barcelona, Spain
- Biomedical Research Networking Center on Oncology-CIBERONC, ISCIII, Madrid, Spain
| | - Tao Qing
- Yale Cancer Center, Yale School of Medicine, New Haven, Connecticut
| | - Julia Foldi
- Yale Cancer Center, Yale School of Medicine, New Haven, Connecticut
| | - Raghav Sehgal
- Yale Cancer Center, Yale School of Medicine, New Haven, Connecticut
| | - Naing Lin Shan
- Yale Cancer Center, Yale School of Medicine, New Haven, Connecticut
| | - Kim R M Blenman
- Yale Cancer Center, Yale School of Medicine, New Haven, Connecticut
| | - Tess A O'Meara
- Yale Cancer Center, Yale School of Medicine, New Haven, Connecticut
| | - Sheila Umlauf
- Yale Center for Molecular Discovery, Yale University, West Haven, Connecticut
| | - Yulia V Surovtseva
- Yale Center for Molecular Discovery, Yale University, West Haven, Connecticut
| | - Viswanathan Muthusamy
- Center for Precision Cancer Modeling, Yale School of Medicine, New Haven, Connecticut
| | - Jesse Rinehart
- Yale Cancer Center, Yale School of Medicine, New Haven, Connecticut
| | - Rachel J Perry
- Yale Cancer Center, Yale School of Medicine, New Haven, Connecticut
| | - Richard Kibbey
- Yale Cancer Center, Yale School of Medicine, New Haven, Connecticut
| | - Christos Hatzis
- Yale Cancer Center, Yale School of Medicine, New Haven, Connecticut
| | - Lajos Pusztai
- Yale Cancer Center, Yale School of Medicine, New Haven, Connecticut
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Chen CY, Chen J, He L, Stiles BL. PTEN: Tumor Suppressor and Metabolic Regulator. Front Endocrinol (Lausanne) 2018; 9:338. [PMID: 30038596 PMCID: PMC6046409 DOI: 10.3389/fendo.2018.00338] [Citation(s) in RCA: 327] [Impact Index Per Article: 54.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Accepted: 06/05/2018] [Indexed: 12/19/2022] Open
Abstract
Phosphatase and Tensin Homolog deleted on Chromosome 10 (PTEN) is a dual phosphatase with both protein and lipid phosphatase activities. PTEN was first discovered as a tumor suppressor with growth and survival regulatory functions. In recent years, the function of PTEN as a metabolic regulator has attracted significant attention. As the lipid phosphatase that dephosphorylates phosphatidylinositol-3, 4, 5-phosphate (PIP3), PTEN reduces the level of PIP3, a critical 2nd messenger mediating the signal of not only growth factors but also insulin. In this review, we introduced the discovery of PTEN, the PTEN-regulated canonical and nuclear signals, and PTEN regulation. We then focused on the role of PTEN and PTEN-regulated signals in metabolic regulation. This included the role of PTEN in glycolysis, gluconeogenesis, glycogen synthesis, lipid metabolism as well as mitochondrial metabolism. We also included how PTEN and PTEN regulated metabolic functions may act paradoxically toward insulin sensitivity and tumor metabolism and growth. Further understanding of how PTEN regulates metabolism and how such regulations lead to different biological outcomes is necessary for interventions targeting at the PTEN-regulated signals in either cancer or diabetes treatment.
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Affiliation(s)
- Chien-Yu Chen
- Department of Pharmacology and Pharmaceutical Sciences, School of Pharmacy, University of Southern California, Los Angeles, CA, United States
| | - Jingyu Chen
- Department of Pharmacology and Pharmaceutical Sciences, School of Pharmacy, University of Southern California, Los Angeles, CA, United States
| | - Lina He
- Department of Pharmacology and Pharmaceutical Sciences, School of Pharmacy, University of Southern California, Los Angeles, CA, United States
| | - Bangyan L. Stiles
- Department of Pharmacology and Pharmaceutical Sciences, School of Pharmacy, University of Southern California, Los Angeles, CA, United States
- Department of Pathology, Keck School of Medicine, University of Southern California, Los Angeles, CA, United States
- *Correspondence: Bangyan L. Stiles
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