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Preparation, Purification, and Use of Fatty Acid-containing Liposomes
Published on: February 9, 2018
Fatty Acid Synthase as a Potential Metabolic Vulnerability in Ocular Adnexal Sebaceous Carcinoma
Autumn Berlied1, Isabella Boyack1, Andre Vieira2,3
1Department of Comparative Pathobiology, Tufts University Cummings School of Veterinary Medicine, North Grafton, MA 01536, USA.
Abstract:
Background: MYC dysregulation is frequent in ocular adnexal sebaceous carcinoma (SebCA), an aggressive malignancy without precision therapy. Fatty acid synthase (FASN) expression and lipid metabolism are commonly perturbed in high-MYC-expressing tumors; however, the role of MYC and FASN in the coregulation of lipid biosynthesis and tumorigenesis in SebCA is unknown. Methods: The aim of this study was to characterize the effects of FASN inhibition on MYC expression, oncogenic processes, and lipid profiles in vitro, using non-neoplastic human Meibomian gland epithelial cells (HMGECs) and three primary SebCA cell lines, and in vivo, utilizing a conditionally MYC-overexpressing mouse model. Results: FASN inhibition reduced cell viability, proliferation, and clonogenicity and altered the saturation profile of fatty acids across multiple lipid classes. The relative saturation of ceramides was the most variable between treatment conditions. MYC overexpression in the murine Meibomian gland promoted proliferation while suppressing sebaceous differentiation. Subsequent topical FASN inhibition further reduced sebaceous differentiation, attenuated PLIN2 expression, and induced apoptotic cell death. Conclusions: Collectively, these findings suggest that MYC expression in SebCA is responsive to FASN inhibition. Pharmacologic targeting of FASN reveals a metabolic vulnerability that may serve as a target for future therapeutic development.
Insights
Targeting fatty acid synthase (FASN) in ocular adnexal sebaceous carcinoma (SebCA) reduces cancer cell growth and alters lipid metabolism. This study reveals FASN as a potential therapeutic target for this aggressive malignancy.
Area of Science:
- Oncology
- Molecular Biology
- Biochemistry
Background:
- Ocular adnexal sebaceous carcinoma (SebCA) is an aggressive cancer with frequent MYC dysregulation.
- Fatty acid synthase (FASN) and lipid metabolism are often altered in MYC-driven tumors, but their specific roles in SebCA are unclear.
Purpose of the Study:
- To investigate the effects of FASN inhibition on MYC expression, SebCA cell behavior, and lipid profiles.
- To explore the therapeutic potential of targeting FASN in SebCA.
Main Methods:
- In vitro studies using human Meibomian gland epithelial cells and SebCA cell lines.
- In vivo studies utilizing a MYC-overexpressing mouse model of SebCA.
- Assessment of cell viability, proliferation, clonogenicity, lipid profiles, and gene expression.
Main Results:
- FASN inhibition decreased SebCA cell viability, proliferation, and clonogenicity.
- FASN inhibition altered fatty acid saturation in various lipid classes, notably ceramides.
- MYC overexpression promoted proliferation and suppressed differentiation in a mouse model, effects exacerbated by FASN inhibition.
Conclusions:
- MYC expression in SebCA is sensitive to FASN inhibition.
- Targeting FASN represents a metabolic vulnerability and a potential therapeutic strategy for SebCA.
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