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  • Title: Exploratory lipidome and metabolome profiling contributes to understanding differences in high and normal ultimate pH beef.
    Author: Antonelo DS, Dos Santos-Donado PR, Ferreira CR, Colnago LA, Ocampos FMM, Ribeiro GH, Ventura RV, Gerrard DE, Delgado EF, Contreras-Castillo CJ, Balieiro JCC.
    Journal: Meat Sci; 2022 Dec; 194():108978. PubMed ID: 36116280.
    Abstract:
    The aim of this work was to compare the lipidome and metabolome profiling in the Longissimus thoracis muscle early and late postmortem from high and normal ultimate pH (pHu) beef. Lipid profiling discriminated between high and normal pHu beef based on fatty acid metabolism and mitochondrial beta-oxidation of long chain saturated fatty acids at 30 min postmortem, and phospholipid biosynthesis at 44 h postmortem. Metabolite profiling also discriminated between high and normal pHu beef, mainly through glutathione, purine, arginine and proline, and glycine, serine and threonine metabolisms at 30 min postmortem, and glycolysis, TCA cycle, glutathione, tyrosine, and pyruvate metabolisms at 44 h postmortem. Lipid and metabolite profiles showed reduced glycolysis and increased use of alternative energy metabolic processes that were central to differentiating high and normal pHu beef. Phospholipid biosynthesis modification suggested high pHu beef experienced greater oxidative stress.
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