Influences of protein ingestion on glucagon‐like peptide (GLP)‐1‐immunoreactive endocrine cells in the chicken ileum |
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Authors: | Mohammad M. Monir Kohzy Hiramatsu Sachiko Matsumoto Kei Nishimura Chihiro Takemoto Tomomi Shioji Takafumi Watanabe Kazumi Kita Shinichi Yonekura Sang Gun Roh |
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Affiliation: | 1. Department of Bioscience and Food Production Science, Interdisciplinary Graduate School of Science and Technology, , Kami‐ina, Japan;2. Laboratory of Animal Functional Anatomy (LAFA), Faculty of Agriculture, , Kami‐ina, Japan;3. Department of Food Production Science, Graduate School of Agriculture, , Kami‐ina, Japan;4. Laboratory of Animal Nutrition, Faculty of Agriculture, Iwate University, , Morioka, Japan;5. Laboratory of Animal Physiology, Faculty of Agriculture, Shinshu University, , Kami‐ina, Japan;6. Laboratory of Animal Physiology, Department of Animal Production Sciences, Graduate School of Agricultural Science, Tohoku University, , Sendai, Japan |
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Abstract: | Influences of a specific dietary nutrient on glucagon‐like peptide (GLP)‐1‐containing cells in the chicken intestine are not yet clear. Significance of dietary protein level on GLP‐1‐containing cells in the chicken ileum was investigated. Chickens fed control or experimental diets of varying protein levels were examined using immunohistochemical and morphometrical techniques. We show that the protein ingestion had an impact on the activities of GLP‐1‐immunoreactive cells in the chicken ileum. Weight gains declined with decreasing dietary crude protein (CP) levels, but no significant differences were detected in the daily feed intake and villous height. GLP‐1‐immunoreactive cells with a round or oval shape were frequently observed in the lower CP level groups (4.5% and 0%). Frequencies of occurrence of GLP‐1‐immunoreactive cells were 41.1 ± 4.1, 38.5 ± 4, 34.8 ± 3.1 and 34.3 ± 3.7 (cells/mm2, mean ± SD) for dietary CP level of 18%, 9%, 4.5% and 0% groups, respectively and significant differences were recognized between the control and lower CP level groups (P < 0.05). Multiple regression analysis indicated a significant correlation between the daily protein intake and frequencies of occurrence of GLP‐1‐immunoreactive cells. The protein ingestion is one of the signals that influence GLP‐1‐containing cells in the chicken small intestine. |
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Keywords: | chicken glucagon‐like peptide‐1 immunohistochemistry intestine protein ingestion |
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