Altered post-mortem metabolism identified in very fast chilled lamb M. longissimus thoracis et lumborum using metabolomic analysis

The aim of this experiment was to use metabolomic techniques to investigate the energy metabolism in lamb M. longissimus thoracis at lumborum subjected to very fast chilling (VFC) post-mortem. The tissue was prepared by 2 different operators and subjected to very fast chilling (less than 0 degrees C within 1.5 h of slaughter) or typical chilling regimes (Control; 0 degrees C within.22 h of slaughter). Non-targeted metabolomic analysis (H-1 NMR) and targeted analysis (P-31 NMR, HPLC-PDA and HPLC-MS/MS) were used to examine the change in muscle metabolites postmortem. One VFC treatment, which resulted in a colder core temperature and more tender meat, had higher levels of glycolytic intermediate metabolites pre-rigor as well as more of the end-products of adenosine and nicotine nucleotide metabolism pre-rigor, relative to conventionally chilled treatments. In conclusion, VFC to less than 0 degrees C within 1.5 h of slaughter causes considerable changes in metabolism and rigor onset, which are associated with tender meat. Crown Copyright (C) 2015 Published by Elsevier Ltd. All rights reserved.