The Interplay between Central and Peripheral Systems in Feed Intake Regulation in European Seabass (<i>Dicentrarchus labrax</i>) Juveniles
2022
Nicole Martins | Carolina Castro | Aires Oliva-Teles | Helena Peres
The present study aimed to evaluate the effects of feeding or feed deprivation on the orexigenic and anorexigenic responses at the central (whole brain) and peripheral (anterior and posterior intestine, stomach, and liver) system levels in European seabass. For this purpose, a group of fish (208 g) was fed a single meal daily for 8 days (fed group) and another group was feed-deprived for 8 days (unfed group). Compared to the fed group, in the whole brain, feed deprivation did not induce changes in <i>npy</i>, <i>agrp1</i>, and <i>cart2</i> expression, but increased <i>agrp2</i> and <i>pomc1</i> expression. In the anterior intestine, feed deprivation increased <i>cck</i> expression, while in the posterior intestine, the <i>npy</i> expression increased and <i>pyyb</i> decreased. In the stomach, the <i>ghr</i> expression decreased regardless of the feeding status. The hepatic <i>lep</i> expression increased in the unfed fish. The present results suggest a feed intake regulation mechanism in European seabass similar to that observed in other teleosts.
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