期刊
COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY B-BIOCHEMISTRY & MOLECULAR BIOLOGY
卷 175, 期 -, 页码 1-8出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.cbpb.2014.06.003
关键词
Chitin; Zygomycetes; Intestinal barrier functions; Amino acid absorption; Plasma cortisol
资金
- Swedish Research Council Formas (Swedish, Research Council for Environment, Agricultural Sciences and Spatial Planning) [229-2009-526]
- Islamic Development Bank
Chitinolytic activity, nutrient uptake and intestinal barrier functions were investigated in gut tissues of Arctic charr (Salvelinus alpinus) fed iso-nitrogenous diets based on fish meal, with or without inclusion of zygomycetes (Rhizopus oryzae). We found that gut tissue of Arctic charr had significant chitinase activity, of both endo- and exo-chitinase iso-forms. Moreover, the distribution pattern along the GI tract of Arctic charr differed between endo-chitinase and exo-chitinase. The endo-chitinase activity in stomach tissue and in the distal intestine was several hundred-fold higher than the exo-chitinase activity in stomach tissue. The greatest exo-chitinase activity was found in the distal intestine. The zygomycete-based diet resulted in higher chitinolytic activity in gut tissue compared to the fish meal-based diet. Disturbed intestinal integrity and increased uptake rate of the amino acid lysine were observed in the distal, but not proximal, intestine of fish fed the zygomycete-based feed. (C) 2014 Elsevier Inc All rights reserved.
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