期刊
BRITISH JOURNAL OF NUTRITION
卷 105, 期 1, 页码 1-9出版社
CAMBRIDGE UNIV PRESS
DOI: 10.1017/S0007114510003181
关键词
Conjugated linoleic acid; Finishing pigs; Intramuscular fat; Proteome
资金
- National Natural Science Foundation of China [30400318]
- National '973' project of China [2004CB117500]
The present experiment was conducted to determine proteome changes in Longissimus muscle of finishing pigs fed conjugated linoleic acid (CLA), in association with alteration of intramuscular fat content. Previously, seventy-two Duroc X Landrace x Large White gilts (approximately 60 kg) had been fed maize-soyabean meal-based diets with 0, 12.5 and 25 g CLA/kg diet. The CIA contained 369.1 mg/g cis-9, trans-11 CIA, 374.6 mg/g trans-10, cis-12 CIA and 53.7 mg/g other isomers. Six pigs per treatment were slaughtered when they reached a body weight of approximately 100 kg. Data published from a previous experiment demonstrated that supplementation with 12.5 or 25 g CLA/kg diet increased intramuscular fat content (P<0.05). The present study investigated the proteome changes in Longissimus muscle of control and pigs supplemented with 25 g CLA/kg diet. CIA significantly influenced the abundance of proteins related to energy metabolism, fatty acid oxidation and synthesis, amino acid metabolism, defence, transport and other miscellaneous processes (P<0.05). The increase in intramuscular fat content was positively correlated with the increased abundance of carbonic anhydrase 3 and aspartate aminotransferase (P<0.05). We suggest that the proteome changes in Longissimus muscle contributed to greater intramuscular lipid content in CIA-supplemented pigs.
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