Effects of the feeding of euglena replaced with dietary soybean on the growth and intestinal mucus of chickens
2019
Ito, K. (Akita Prefectural University (Japan). Faculty of Bioresource Sciences) | Sasawatari, K. | Abe, R. | Fujimori, W. | Watanabe, S. | Suzuki, K. | Asayama, Y. | Minami, I. | Nishimukai, M. | Kita, K.
Ministry of Agriculture, Forestry and Fisheries in Japan reported that the self-sufficiency rate of feedstuffs was approximately 25%. Most of grains for feedstuffs like com, soybean and wheat are imported from overseas to Japan, which results in a sharp increase in prices of commercial animal feeds because of various incidents like the climate change, also called global warming. To solve this problem, it is important to increase the domestic supply of unused resources which can be alternative to feed grains. Recently, Euglena, which is a genus of single-celled flagellate eukaryotes, has been used to be a material of dietary supplements, cosmetics and feedstuffs because it has a plenty of nutrients. But the dietary effect of Euglena gracilis has not been elucidated so far. In the present study, the influence of E. gracilis replaced with soybean in diets on the growth of chickens was examined. E. gracilis replaced with all of soybean did not showed any adverse effects on the growth of chickens. The mRNA expression levels of MUC2 and LYZ C were increased along with the increase in dietary E. gracilis content. When most dietary fiber was replaced with paramylon, which is a resistant carbohydrate and made in E. gracilis, the mRNA expression level of LYZ C was elevated compared to the control. These results suggest that all of soybean can be replaced with E. gracilis, and dietary E. gracilis could enhance intestinal immunity of chickens.
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