Precursors for liver gluconeogenesis in periparturient dairy cows.

摘要: The review is based on a compiled data set from studies quantifying liver release of glucose concomitant with uptake amino acids (AA) and other glucogenic precursors in periparturient dairy cows. It has become dogma that AAs are significant contributors to gluconeogenesis early lactation, presumably accounting for the observed lack balance estimated need. Until recently, there been paucity quantitative nutrient metabolism period. Propionate quantitatively most important precursor throughout However, immediate post partum increment not followed by an equivalent propionate uptake, because lower rate feed intake compared requirements milk synthesis. AA do support hypothesis rapid increase net supported increased utilisation gluconeogenesis. Only alanine likely contribute through its role inter-organ transfer nitrogen catabolised AA. seem be prioritised anabolic purposes, indicating relevance investigating effects supplying additional protein Combining qualitative experimental techniques L-lactate point conclusion adaptation demand period endogenous recycling carbon lactate. This mediated dual site peripheral tissues, where affinity tissues shifted towards formation over complete oxidation.