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Roci I, Watrous JD, Lagerborg KA, Lafranchi L, Lindqvist A, Jain M, Nilsson R. Mapping Metabolic Events in the Cancer Cell Cycle Reveals Arginine Catabolism in the Committed SG 2M Phase. Cell Rep 2019; 26:1691-1700.e5. [PMID: 30759381 PMCID: PMC6663478 DOI: 10.1016/j.celrep.2019.01.059] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Revised: 12/10/2018] [Accepted: 01/16/2019] [Indexed: 12/26/2022] Open
Abstract
Alterations in cell-cycle regulation and cellular metabolism are associated with cancer transformation, and enzymes active in the committed cell-cycle phase may represent vulnerabilities of cancer cells. Here, we map metabolic events in the G1 and SG2M phases by combining cell sorting with mass spectrometry-based isotope tracing, revealing hundreds of cell-cycle-associated metabolites. In particular, arginine uptake and ornithine synthesis are active during SG2M in transformed but not in normal cells, with the mitochondrial arginase 2 (ARG2) enzyme as a potential mechanism. While cancer cells exclusively use ARG2, normal epithelial cells synthesize ornithine via ornithine aminotransferase (OAT). Knockdown of ARG2 markedly reduces cancer cell growth and causes G2M arrest, while not inducing compensation via OAT. In human tumors, ARG2 is highly expressed in specific tumor types, including basal-like breast tumors. This study sheds light on the interplay between metabolism and cell cycle and identifies ARG2 as a potential metabolic target.
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Affiliation(s)
- Irena Roci
- Cardiovascular Medicine Unit, Department of Medicine, Karolinska Institutet, SE-171 76 Stockholm, Sweden; Division of Cardiovascular Medicine, Karolinska University Hospital, SE-171 76 Stockholm, Sweden; Center for Molecular Medicine, Karolinska Institutet, SE-171 76 Stockholm, Sweden
| | - Jeramie D Watrous
- Departments of Medicine and Pharmacology, University of California, San Diego, 9500 Gilman Avenue, La Jolla, CA 92093, USA
| | - Kim A Lagerborg
- Departments of Medicine and Pharmacology, University of California, San Diego, 9500 Gilman Avenue, La Jolla, CA 92093, USA
| | - Lorenzo Lafranchi
- Department of Cell and Molecular Biology, Karolinska Institutet, SE-171 65 Stockholm, Sweden
| | - Arne Lindqvist
- Department of Cell and Molecular Biology, Karolinska Institutet, SE-171 65 Stockholm, Sweden
| | - Mohit Jain
- Departments of Medicine and Pharmacology, University of California, San Diego, 9500 Gilman Avenue, La Jolla, CA 92093, USA
| | - Roland Nilsson
- Cardiovascular Medicine Unit, Department of Medicine, Karolinska Institutet, SE-171 76 Stockholm, Sweden; Division of Cardiovascular Medicine, Karolinska University Hospital, SE-171 76 Stockholm, Sweden; Center for Molecular Medicine, Karolinska Institutet, SE-171 76 Stockholm, Sweden.
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Choi S, Song S, Choi C, Park JK. Microfluidic Self-Sorting of Mammalian Cells to Achieve Cell Cycle Synchrony by Hydrophoresis. Anal Chem 2009; 81:1964-8. [PMID: 19245266 DOI: 10.1021/ac8024575] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Sungyoung Choi
- Department of Bio and Brain Engineering, College of Life Science and Bioengineering, KAIST, 335 Gwahangno, Yuseong-gu, Daejeon 305-701, Republic of Korea
| | - Seungjeong Song
- Department of Bio and Brain Engineering, College of Life Science and Bioengineering, KAIST, 335 Gwahangno, Yuseong-gu, Daejeon 305-701, Republic of Korea
| | - Chulhee Choi
- Department of Bio and Brain Engineering, College of Life Science and Bioengineering, KAIST, 335 Gwahangno, Yuseong-gu, Daejeon 305-701, Republic of Korea
| | - Je-Kyun Park
- Department of Bio and Brain Engineering, College of Life Science and Bioengineering, KAIST, 335 Gwahangno, Yuseong-gu, Daejeon 305-701, Republic of Korea
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Rao S, Gray-Bablin J, Herliczek TW, Keyomarsi K. The biphasic induction of p21 and p27 in breast cancer cells by modulators of cAMP is posttranscriptionally regulated and independent of the PKA pathway. Exp Cell Res 1999; 252:211-23. [PMID: 10502413 DOI: 10.1006/excr.1999.4620] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Cyclic AMP (cAMP) elevation affects growth arrest and differentiation in a wide variety of breast cell lines; however, the mechanisms associated with this process are poorly understood. Previous studies linked cAMP-mediated growth arrest in breast tumor cells to increased levels of cyclin kinase inhibitor (CKI), p21. In the present study we examined the role of cAMP-dependent protein kinase (PKA) on p21 and p27 induction in the breast cancer cell line, MDA-MB-157. The induction of the CKIs by modulators of cAMP such as cholera toxin (CT) + 1-isobutyl-3-methylxanthine (IBMX) and lovastatin fluctuates with biphasic kinetics (although the kinetics of CKI induction with CT + IBMX treatment are different from that of lovastatin) and is depicted by the periodic accumulation of lower molecular weight forms of p21 and p27 which also correlate with fluctuations in CDK2 activity. Using three different approaches we show that the cAMP-mediated induction of CKIs is independent of PKA activity. In the first approach we treated MDA-MB-157 cells with a variety of cAMP modulators such as CT + IBMX, and forskolin in the presence or absence of H-89, a potent PKA inhibitor. This analysis revealed that the cAMP activators were capable of inducing p21 even though PKA activity was completely eliminated. In the second approach PKA dominant negative stable clones of MDA-MB-157 treated with CT + IBMX or forskolin also resulted in p21 induction, in the absence of any PKA activity. Last, treatment of MDA-MB-157 cells with lovastatin, another known cAMP modulator which also causes growth arrest, resulted in the induction of p21 and p27 without any increase in PKA activity. Collectively, the above results suggest that the induction of p21 by cAMP is through a novel pathway, independent of PKA activity.
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Affiliation(s)
- S Rao
- Division of Molecular Medicine, Wadsworth Center, Laboratory of Diagnostic Oncology, Albany, New York 12201-0509, USA
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