魚類の脂肪酸代謝に関する研究-7-コイ肝膵臓と血合肉ミトコンドリアにおけるβ-酸化に対する絶食の影響

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The present study was concerned with the effect of starvation on β-Oxidation of 8:0 acid in carp (Cyprinus carpio) hepatopancreas and dark muscle mitochondria, in order to elucidate the characteristics of β-oxidation in fish. The effect of starvation on the β-oxidation in carp was limited: the β-oxidation in hepatopancreas mitochondria remained almost unchanged during starvation for 70 days, while that in dark muscle mitochondria was accelerated after the 10th day. The level of free fatty acid in the plasma of carp did not increase during star ation, in contrast with the level in mammals. This suggests that the factors which participate in the acceleration of β-oxidation in carp dark muscle during starvation are different from those in mammals liver. The contribution of the hepatopancreas to the β-oxidation in carp was significantly depressed owing to the decrease of the tissue during starvation. On the other hand, that of dark muscle was greatly elevated by starvation. Consequently, it can be assumed that dark muscle mitochondria plays a significant role in the energy metabolism due to β-oxidation in starving carp. However, it may be further concluded that the energy metabolism due to β-oxidation in carp is decreased by starvation, in contrast with that in rats.
日本水産學會の論文