Nutritional history does not modulate hepatic oxidative status of European sea bass (Dicentrarchus labrax) submitted to handling stress

• Tipo: Artigo em Revista Científica Internacional
• Data: 2018

Autores

Castro, C (Autor) Outra; Perez Jimenez, A (Autor) Outra; Coutinho, F (Autor) Outra; Corraze, G (Autor) Outra; Panserat, S (Autor) Outra; Peres, H (Autor) FCUP; Oliva Teles, A (Autor) FCUP; Enes, P (Autor) FCUP

Revista

Título: Fish Physiology and Biochemistry

Vol. 44

Páginas: 911-918

ISSN: 0920-1742

Editora: Springer Nature

Indexação

ISI Web of Knowledge - 9 Citações

Scopus - 10 Citações

Outras Informações

ID Authenticus: P-00N-N14

DOI: 10.1007/s10695-018-0480-6

Abstract (EN): The aim of the present study was to assess the impact of an acute handling stress on hepatic oxidative status of European sea bass (Dicentrarchus labrax) juveniles fed diets differing in lipid so urce and carbohydrate content. For that purpose, four diets were formulated with fish oil (FO) and vegetable oils (VO) as lipid source and with 20 or 0% gelatinized starch as carbohydrate source. Triplicate groups of fish with 74 g were fed each diet during 13 weeks and then subjected to an acute handling stress. Stress exposure decreased hematocrit (Ht) and hemoglobin (Hb) levels. Independent of dietary treatment, stress exposure increased hepatic lipid peroxidation (LPO). Stressed fish exhibited lower glucose 6-phosphate dehydrogenase (G6PD), catalase (CAT), and superoxide dismutase (SOD) activities, independent of previous nutritional history. In the VO groups, stress exposure increased glutathione peroxidase (GPX) activity. Diet composition had no effect on Ht and Hb levels. In contrast, dietary carbohydrate decreased hepatic LPO and CAT activity and increased glutathione reductase (GR) and G6PD activities. Dietary lipids had no effect on LPO. Fish fed the VO diets exhibited higher G6PD activity than fish fed the FO diets. In conclusion, dietary carbohydrates contributed to the reduction of oxidative stress in fish. However, under the imposed handling stress conditions, liver enzymatic antioxidant mechanisms were not enhanced, which may explain the overall increased oxidative stress.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 8