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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Immunomodulatory Effects of Dietary -glucan and Vitamin C in Nile Tilapia, Oreochromis niloticus L., Subjected to Cold-induced Stress or Bacterial Challenge

Texto completo
Autor(es):
Barros, Margarida M. [1] ; Falcon, Dario R. [1] ; Orsi, Ricardo O. [1] ; Pezzato, Luiz E. [1] ; Fernandes Junior, Ademir C. [1] ; Fernandes Junior, Ary [1] ; de Carvalho, Pedro L. P. F. [1] ; Padovani, Carlos R. [1] ; Guimaraes, Igo G. [2] ; Sartori, Maria M. P. [3]
Número total de Autores: 10
Afiliação do(s) autor(es):
[1] Sao Paulo State Univ, Sch Vet Med & Anim Sci, BR-18618970 Botucatu, SP - Brazil
[2] Univ Fed Goias, Aquaculture Res Lab, BR-75801615 Jatai, Go - Brazil
[3] Sao Paulo State Univ, Sch Agr Sci, BR-18618970 Botucatu, SP - Brazil
Número total de Afiliações: 3
Tipo de documento: Artigo Científico
Fonte: JOURNAL OF THE WORLD AQUACULTURE SOCIETY; v. 46, n. 4, p. 363-380, AUG 2015.
Citações Web of Science: 3
Resumo

To determine the dietary -glucan and vitamin C levels that would enable the fish to cope with different stress, 252 tilapia (16.86 +/- 0.24 g) were distributed in thirty six 250-L aquaria and fed experimental diets for 60 d. Diets were supplemented with -glucan (0.1, 0.2, 0.4, and 0.8%) and vitamin C (400 and 600 mg/kg diet) and distributed in a factorial design that included a control diet (0 -glucan/125 mg vitamin C/kg). After growth performance analyses, a group of 108 fish were subjected to cold-induced stress and another to Aeromonas hydrophila infection. Hematological and immunological parameters were determined before and after the stress. Growth performance was not affected. Red blood cells, hematocrit, mean corpuscular volume, total plasma protein, albumin : globulin ratio and leukocytes, lymphocytes, neutrophils, and monocytes were affected (P < 0.05) by stress and/or diets. The control diet resulted in higher post-infection cortisol (P < 0.05). Liver vitamin C was directly proportional to dietary vitamin C (P < 0.05). The production of hydrogen peroxide and nitric oxide was also affected by diets and/or bacterial challenge (P < 0.05). In total, 0.1-0.2% -glucan and 600 mg/kg vitamin C increased fish resistance to stress and 0.8% -glucan resulted in reduced immune responses regardless of the vitamin C supplementation level. (AU)

Processo FAPESP: 03/07901-1 - Inter-relação entre o b-glucano e a vitamina C no desempenho produtivo e respostas fisiológicas da Tilápia do Nilo Oreochromis niloticus
Beneficiário:Dario Rocha Falcon
Linha de fomento: Bolsas no Brasil - Doutorado