Cited by 151Cancer, Lipids, and MetabolismLipid metabolism and biosynthesisSphingolipid Metabolism and Signaling

A fatty acid synthase blockade induces tumor cell-cycle arrest by down-regulating Skp2

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Knowles, Lynn M., Axelrod, Fumiko, Browne, Cecille D., Smith, Jeffrey W.·2004·Journal of Biological Chemistry

Abstract

In eukaryotes, fatty acid synthase (FAS) is the enzyme responsible for synthesis of palmitate, the precursor of long-chain nonessential fatty acids. FAS is up-regulated in a wide range of cancers and has been suggested as a relevant drug target. Here, two independent approaches are taken toward knocking down FAS and then probing its connection to tumor cell proliferation. In one approach, Orlistat, a drug approved for treating obesity, is used as a potent inhibitor of the thioesterase function of FAS. In a separate strategy, the expression of FAS is suppressed by targeted knock-down with small interfering RNA. In both circumstances, the ablation of FAS activity causes a dramatic down-regulation of Skp2, a component of the E3 ubiquitin ligase that controls the turnover of p27Kip1. These effects ultimately tie into the retinoblastoma protein pathway and lead to a cell-cycle arrest at the G1/S boundary. Altogether, the findings of the study reveal unappreciated links between fatty acid synthase and ubiquitin-dependent proteolysis of cell-cycle regulatory proteins.

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Crossref · 10.1074/jbc.m405061200

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  • FASN can promote cancer progression and contribute to therapy resistance by sustaining mitogenic signaling, facilitating the G1/S transition, and supplying lipid resources necessary for biomass accumulation and evasion of cell cycle checkpoints.

    “FASN can promote cancer progression and contribute to therapy resistance by sustaining mitogenic signaling, facilitating the G1/S transition, and supplying lipid resources necessary for biomass accumulation and evasion of cell cycle checkpoints [30,48].”

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Authors
Knowles, L. M., Axelrod, F., Browne, C. D., & Smith, J. W.
Affiliations
Sanford Burnham Prebys Medical Discovery Institute (US)
Corresponding author
Smith, Jeffrey W.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2004-07
Volume
279
Issue
29
Pages
30540-30545
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2115307821
Cited by
146
References
38
Citations by year
2026: 3 · 2025: 4 · 2024: 6 · 2023: 5 · 2022: 2 · 2021: 4 · 2019: 4 · 2018: 5 · 2017: 7 · 2016: 4 · 2015: 5 · 2014: 12 · 2013: 6 · 2012: 13
FWCI
3.48
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Funders
National Cancer Institute (CA30199, CA-69306, R01CA069306, CA6982713, P30CA030199)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Cancer, Lipids, and Metabolism
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biochemistry › Lipid metabolism and biosynthesis
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Sphingolipid Metabolism and Signaling
Keywords
fatty acid synthase, Skp2, orlistat, cell cycle arrest, G1/S checkpoint, p27, ubiquitin-mediated proteolysis, E3 ubiquitin ligase, tumor cell proliferation, siRNA knockdown, cancer drug targets
MeSH terms
Orlistat, Avidin, Biotin, Cell Cycle, Cell Division, Cell Line, Dose-Response Relationship, Drug, Epithelial Cells, Fatty Acids, Humans, Lactones, Lipase, Obesity, Serine Endopeptidases, Time Factors, Blotting, Western, Down-Regulation, Retinoblastoma Protein, G1 Phase, S Phase, Cell Cycle Proteins, Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization, Palmitic Acid, Tumor Suppressor Proteins, Ubiquitin, RNA, Small Interfering, Ubiquitin-Protein Ligases, S-Phase Kinase-Associated Proteins, Cell Line, Tumor, Cyclin-Dependent Kinase Inhibitor p27, Fatty Acid Synthases

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