Effects of inulin on gilthead seabream (Sparus aurata L.) innate immune parameters.
Inulin, a fructooligossacharide, is a prebiotic that plays an important role in the immune function in mammals, but it has never been assayed in other vertebrate groups. Thus, we have studied the inulin effects on the gilthead seabream (Sparus aurata L.) innate immune response both in vitro and in vivo. For the in vitro study, head-kidney leucocytes were incubated with inulin (ranging from 0 to 1000 microg ml(-1)) for 30, 90, 180 and 300 min and 24h and any effect was observed on leucocyte viability or the main innate cellular immune responses (leucocyte peroxidase, phagocytic, respiratory burst and natural cytotoxic activities). For the in vivo study, seabream specimens were fed for 1 or 2 weeks with a commercial diet supplemented with inulin: 0 (control), 5 or 10 g inulin kg(-1) diet (0.5 and 1%, respectively). Inulin produced a significant inhibition in phagocytosis and respiratory burst in leucocytes from specimens fed diets containing 0.5% or 1% of inulin for 1 week. Based on the present results, inulin does not seem to be a good immunostimulant for seabream, though its effects in other species and combined with other immunostimulans (i.e. probiotics) might be of great interest.
Cerezuela
Rebeca
R
Fish Innate Immune System Group, Department of Cell Biology, Faculty of Biology, University of Murcia, 30100 Murcia, Spain.
Cuesta
Alberto
A
Meseguer
José
J
Angeles Esteban
M
M
D000276:Adjuvants, Immunologic / Q000494:pharmacology*; D000818:Animals; D019587:Dietary Supplements; D007113:Immunity, Innate / Q000187:drug effects*; D007444:Inulin / Q000494:pharmacology*; D007668:Kidney / Q000166:cytology; D007962:Leukocytes / Q000187:drug effects / Q000201:enzymology; D009195:Peroxidase / Q000097:blood; D010587:Phagocytosis / Q000187:drug effects; D016897:Respiratory Burst / Q000187:drug effects; D021541:Sea Bream / Q000033:anatomy & histology / Q000276:immunology*
D000276:Adjuvants, Immunologic; D007444:Inulin; D009195:Peroxidase