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Fatty acid synthase inhibition induces differential expression of genes involved in apoptosis and cell proliferation in ocular cancer cells

Deepa, P.Ravi.; Vandhana, S.; Krishnakumar, S.

Nutrition and Cancer 65(2): 311-316

2013

ISSN/ISBN: 0163-5581
PMID: 23441619
DOI: 10.1080/01635581.2013.748923
Accession: 036785747
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Fatty acid synthase (FASN), a lipogenic multienzyme complex, is overexpressed in the ocular cancer, retinoblastoma, and is strongly correlated with tumor invasion. Dietary nutrients are reported to exert anticancer effects through inhibition of lipid metabolism. Differential gene expression in cultured retinoblastoma cells induced by cerulenin, a chemical inhibitor of FASN, was evaluated by cDNA microarray analysis. Cerulenin treatment resulted in significant upregulation of cytochrome c (CYCS) by 1.2-fold, whereas S-phase kinase-associated protein-2 (SKP2), a negative regulator of cell cycle, and the lipid metabolic genes (PPARA, RXRA, and ACACB) were significantly downregulated by -1.59-, -1.8-, -1.83-, and -1.5-fold, respectively, in comparison with untreated cancer cells. The expressions of key differentially expressed genes were confirmed by quantitative real-time PCR. The altered expression of genes involved in cell proliferation, cell signaling, apoptosis, and cell cycle, correlated with the anticancer effects of cerulenin. FASN inhibition may thus be a potential strategy in retinoblastoma management.

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