Abstract 4419: HER2 expression and 17β-estradiol induce ACSL4 expression in estrogen receptor positive mammary carcinoma cells

Breast cancer is a multifactorial disease involving several molecular changes and a high proliferation rate often under the activation of hormonal receptors. Therefore, cancer cells require the metabolic machinery for membrane synthesis and to promote signaling pathways. Amongst biomolecules required for efficient cell growth are polyunsaturated fatty acids, like arachidonic acid, that are essential nutrients whose cellular uptake is partly governed by long chain acyl-CoA synthetases (ACSL). In this study, we investigated the impact of 17β-estradiol and Human Epidermal growth factor Receptor 2 (HER2) on cellular uptake of polyunsaturated fatty acids and on the expression of ACSLs. The administration of 17β-estradiol in steroid-starved MCF-7 and T47D mammary carcinoma cells induced a significant increase in cellular uptake of arachidonic acid (AA) and eicosapentaenoic acid (EPA), and in ACSL4 protein content (p Citation Format: Maroua Mbarik, Anissa Belkaid, Marc E. Surette. HER2 expression and 17β-estradiol induce ACSL4 expression in estrogen receptor positive mammary carcinoma cells [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2017; 2017 Apr 1-5; Washington, DC. Philadelphia (PA): AACR; Cancer Res 2017;77(13 Suppl):Abstract nr 4419. doi:10.1158/1538-7445.AM2017-4419