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2 protocols using c8 c30 fatty acid methyl esters fames

1

Metabolomic Analysis of Breast Cancer Cells

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Human breast cancer cell line MDA-MB-231 was obtained from the America Type Culture Collection (ATCC, Manassas, VA). The cell lines were prepared as previously described [47 (link)]. For the experiments, cells were trypsinized, and one million cells were counted and washed with 1X PBS; cell pellets were frozen at −80 °C. A total of three replicates were prepared for each cell types. Ethanol, pyridine, methoxyamine hydrochloride, C8−C30 fatty acid methyl esters (FAMEs), and ammonium acetate were purchased from Sigma-Aldrich (St. Louis, MO). Liquid chromatography−mass spectrometry (LC−MS) Optima-grade methanol and acetonitrile, formic acid, N-methyl-N-trimethyl –silyl-tri-fluoro-acetamide (MSTFA) with 1% TMCS, and hexane were obtained from Fisher Sci. (Fair Lawn, NJ). The ultrapure water was produced by Millipore Advantage A10 system with an LC−MS Polisher filter (Billerica, MA).
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2

Comprehensive Metabolite Analysis Protocol

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Ethanol, pyridine, methoxyamine hydrochloride, C8–C30 fatty acid methyl esters (FAMEs), and ammonium acetate were purchased from Sigma-Aldrich (St. Louis, MO). Liquid chromatography (LC)–mass spectrometry (MS) Optima grade mEthanol and acetonitrile, formic acid, N-methyl-N-trimethylsilyltrifluoroacetamide with 1% trimethylchlorosilane (TMCS), and hexane were obtained from Fisher Scientific (Fair Lawn, NJ). The ultrapure water was produced by the Millipore Advantage A10 system with a LC–MS Polisher filter (Billerica, MA). Analytical grade sodium hydroxide, sodium bicarbonate, and anhydrous sodium sulfate were obtained from JT Baker Co. (Phillipsburg, NJ, USA). AA and lipid standards were included in the AbsoluteIDQ p180 Kit (Biocrates Life Sciences, Austria). All other standards were commercially purchased from Sigma-Aldrich and Nu-Chek Prep (Elysian, MN, USA).
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