Evidence that ghrelin may be associated with the food intake of gibel carp (Carassius auratus gibelio)
文献类型： 外文期刊
作者： Zhou, Chaowei 1 ; Zheng, Jinfa 1 ; Lei, Luo 1 ; Yuan, Dengyue; Zhu, Chengke 1 ; Ye, Hua 1 ; Zhang, Chi; Wang, Dan 1 ;
作者机构： 1.Southwest Univ, Dept Aquaculture, Dept Fisheries, Rongchang Campus, Chongqing 402460, Peoples R China
2.Southwest Univ, Dept Aquaculture, Dept Fisheries, Rongchang Campus, Chongqing 402460, Peoples R C
关键词： Gibel carp;Ghrelin;Tissue expression;Appetite regulation
期刊名称：FISH PHYSIOLOGY AND BIOCHEMISTRY （ 影响因子：2.794； 五年影响因子：2.876 ）
ISSN：
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收录情况： SCI
摘要： Ghrelin, a non-amidated peptide hormone, is a potent anorectic neuropeptide implicated in feeding regulation in mammals and non-mammalian vertebrates. However, the involvement of ghrelin in the feeding behavior of teleosts has not been well understood. To better understand the role of ghrelin in the regulation of appetite in fish, in this study, we cloned the cDNAs encoding ghrelin and investigated their mRNA distributions in gibel carp tissues. We also assessed the effects of different nutritional status on ghrelin mRNA abundance. Ghrelin mRNAs were ubiquitously expressed in ten tissues (intestine, liver, brain, mesonephron, head kidney, spleen, skin, heart, muscle, gill and pituitary gland), and relatively high expression levels were detected in the gut. Postprandial studies analysis revealed a significant postprandial decrease in ghrelin mRNA expression in the gut (1 and 3 h after the regular feeding time). In addition, ghrelin mRNA expression in the gut significantly increased at day 7 after fasting and declined sharply after refeeding, which suggested that ghrelin might be involved in the regulation of appetite in gibel carp. Overall, our result provides basis for further investigation into the regulation of feeding in gibel carp.
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