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Abnormal fatty acid (FA) synthesis is one of the common features of cancer. Fatty acid synthase (FASN), a multifunctional enzyme playing a key role in biosynthesis of FA, is up-regulated in prostate, breast, and lung carcinomas. Orlistat is a FDA-approved anti-obesity drug that inhibits the thioesterase domain of FASN, interferes with cellular FA synthesis, can arrest tumor cell proliferation, and induces tumor cell apoptosis. The current study was aimed to investigate the metabolic changes associated with FASN inhibition by orlistat and to understand the molecular mechanisms behind the observed metabolic changes in non-small cell lung carcinoma (NSCLC) cell lines.

molecular imaging and biology

Metabolic Shifts Induced by Fatty Acid Synthase Inhibitor Orlistat in Non-small Cell Lung Carcinoma Cells Provide Novel Pharmacodynamic Biomarkers for Positron Emission Tomography and Magnetic Resonance Spectroscopy