Kouba M, Mourot J
Ensa de Rennes, France.
Reprod Nutr Dev. 1998 Jan-Feb;38(1):31-7. doi: 10.1051/rnd:19980103.
The effects of three diets were compared: a high linoleic acid diet (diet M containing 4% maize oil), diet T containing 4% beef tallow, and C, a conventional control diet, on delta 9-desaturase activity and lipogenesis in pig subcutaneous adipose tissue. Diet M increased lipogenesis (estimated from the activities of acetyl-CoA-carboxylase, malic enzyme and glucose-6-phosphate dehydrogenase), and decreased delta 9-desaturase activity, in comparison to the other diets. Linoleic acid content was higher in the pigs fed diet M than in the other pigs (amounting to 26% of total tissue fatty acids versus 15%, respectively). The lower monounsaturated fatty acid content in adipose tissue of pigs fed diet M compared to pigs fed other diets could be associated with the lower delta 9-desaturase activity and the lower oleic acid content of diet M. The present study suggests that delta 9-desaturase could be involved in the regulation of monounsaturated fatty acid content and hence in the quality of pig adipose tissue.
比较了三种日粮对猪皮下脂肪组织中Δ9-去饱和酶活性和脂肪生成的影响：高亚油酸日粮（含4%玉米油的日粮M）、含4%牛脂的日粮T以及传统对照日粮C。与其他日粮相比，日粮M增加了脂肪生成（根据乙酰辅酶A羧化酶、苹果酸酶和葡萄糖-6-磷酸脱氢酶的活性估算），并降低了Δ9-去饱和酶活性。饲喂日粮M的猪的亚油酸含量高于其他猪（分别占总组织脂肪酸的26%和15%）。与饲喂其他日粮的猪相比，饲喂日粮M的猪的脂肪组织中单不饱和脂肪酸含量较低，这可能与日粮M中较低的Δ9-去饱和酶活性和较低的油酸含量有关。本研究表明，Δ9-去饱和酶可能参与单不饱和脂肪酸含量的调节，从而参与猪脂肪组织的品质调节。
