Apr 9, 2020

β-alanine or L-carnosine prevents the development of pale, soft and exudative pork by inhibiting the glycolysis of porcine longissimus dorsi muscle

BioRxiv : the Preprint Server for Biology
L. ZhaoQiugang Ma


Carnosine plays an important role in regulating muscle buffering capacity and glycolysis. In order to investigate the effects of dietary {beta}-alanine,L-histidine and L-carnosine supplementation on the pH value, glycolytic potential, the activities of AMP-activated protein kinase (AMPK) and pyruvate kinase (PK) activities in the porcine longissimus dorsi muscle, a total of 60 barrows with an average body weight (BW) were assigned into five groups which received diets containing basal diet (control, CON), 0.04%{beta}-alanine ({beta}-ALA), 0.06% L-histidine (L-HIS), 0.04%{beta}-alanine+0.06% L-histidine ({beta}-ALA+L-HIS), or 0.1% L-carnosine (L-CAR). The results showed that dietary supplementation of the combination of {beta}-ALA and L-HIS or L-CAR significantly increased (P < 0.05) the average daily gain (ADG) of pigs with 50-75 kg BW, compared with other three groups. Compared with L-CAR group, L-HIS supplementation significantly decreased (P < 0.05) the average daily feed intake (ADFI) of pigs. There were no significant difference (P > 0.05) in back fat thickness and loin eye area among treatments. At 0, 1 and 24 h postmortem (PM) the pH values in the longissimus dorsi muscle (LM) of pigs receiving L-CAR were higher (P < 0.0...Continue Reading

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Primary Health Care
Salmonella enterica
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Synthetic Peptide Library
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