Little information on the effects of a high α-linolenic acid (C18:3n-3) diet fatty composition and lipid-producing gene expression in hepatopancreas from Yellow River carp (Cyprinus carpio). In study, 60 common juveniles were fed for 50 days, supplemented with linseed oil (LO), control without addition to evaluate effect lipid peroxisome proliferator-activated receptors (PPAR-α), delta-6 desatu...

The objectives of this study were 1) to determine whether selection toward less subcutaneous fat thickness at constant intramuscular fat content in pigs is related to tissue-specific changes in the expression of lipogenic enzymes acetyl-CoA carboxylase (ACC), stearoyl-CoA desaturase (SCD), and Delta(6)-desaturase (Delta6d); and 2) to investigate tissue specific distribution of the porcine ACC, ...

This study investigated the effects of dietary linolenic acid (C18:3n-3) v. linoleic acid (C18:2n-6) on fatty acid composition and protein expression of key lipogenic enzymes, acetyl-CoA carboxylase (ACC), stearoyl-CoA desaturase (SCD) and delta 6 desaturase (Δ6d) in longissimus muscle and subcutaneous adipose tissue of bulls. Supplementation of the diet with C18:3n-3 was accompanied by an incr...

The mammalian target of rapamycin (mTOR) has been shown to play a central role in regulating cell growth and metabolism. However, little is known about the function mTOR nutrient metabolism bivalve mollusks. In this study, regulation was investigated Sinonovacula constricta. First, activation assayed after starvation refeeding. Afterwards, using an activator (MHY1485) or inhibitor (rapamycin) m...

Fatty acid desaturases such as steaoryl-CoA desaturase (SCD) convert saturated to unsaturated fatty acids and are involved in lipogenesis. Observational and animal data suggest that SCD-1 activity is related to insulin sensitivity. However, the effects of insulin-sensitizing drugs on SCD gene expression and desaturase activities are unknown in humans. In a randomized, placebo-controlled, double...

A single gene encoding a 6-desaturase (FADS2) has been isolated and characterized in mammalian species. This 6-desaturase plays a major role in the biosynthesis of PUFAs (polyunsaturated fatty acids). It catalyses the rate-limiting desaturation of linoleic acid (C18:2 n− 6) and α-linolenic acid (C18:3 n− 3) required for the biosynthesis of long-chain PUFAs. Moreover, recent studies have provide...

A key and highly regulated enzyme that is required for the biosynthesis of monounsaturated fatty acids is stearoyl-CoA desaturase (SCD), which catalyzes the D(9)-cis desaturation of a range of fatty acyl-CoA substrates. The preferred substrates are palmitoyl- and stearoyl-CoA, which are converted into palmitoleoyl- and oleoyl-CoA respectively. Oleate is the most abundant monounsaturated fatty a...

Stearoyl-coenzyme A desaturase (SCD) is a key regulator of membrane fluidity, turns over rapidly, and represents a prototype for selective degradation of resident proteins of the endoplasmic reticulum. Using detergent-solubilized, desaturase-induced rat liver microsomes we have characterized a protease that degrades SCD. Degradation of SCD in vitro is highly selective, has a half-life of 3-4 h,...