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Br J Nutr

Title:		The characteristics of glucose homoeostasis in grass carp and Chinese longsnout catfish after oral starch administration: a comparative study between herbivorous and carnivorous species of fish
Author(s):		Su J; Gong Y; Mei L; Xi L; Chi S; Yang Y; Jin J; Liu H; Zhu X; Xie S; Han D;
Address:		"State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, Hubei 430072, People's Republic of China. University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China. Laboratory of Aquatic Animal Nutrition and Feed, Fisheries College, Guangdong Ocean University, Zhanjiang, Guangdong 524088, People's Republic of China. Southern Marine Science and Engineering Guangdong Laboratory, Zhanjiang, Guangdong 524088, People's Republic of China. Hubei Engineering Research Center for Aquatic Animal Nutrition and Feed, Wuhan, Hubei 430072, People's Republic of China"
Journal Title:		Br J Nutr
Year:		2020
Volume:		20191209
Issue:		6
Page Number:		627 - 641
DOI:		10.1017/S0007114519003234
ISSN/ISBN:		1475-2662 (Electronic) 0007-1145 (Linking)
Abstract:		"An oral starch administration trial was used to evaluate glucose homoeostasis in grass carp (Ctenopharyngodon idella) and Chinese longsnout catfish (Leiocassis longirostris Gunther). Fish were administered with 3 g of a water and starch mixture (with 3:2 ratio) per 100 g body weight after fasting for 48 h. Fish were sampled at 0, 1, 3, 6, 12, 24 and 48 h after oral starch administration. In grass carp, plasma levels of glucose peaked at 3 h but returned to baseline at 6 h. However, in Chinese longsnout catfish, plasma glucose levels peaked at 6 h and returned to baseline at 48 h. The activity of intestinal amylase was increased in grass carp at 1 and 3 h, but no significant change in Chinese longsnout catfish was observed. The activity of hepatic glucose-6-phosphatase fell significantly in grass carp but change was not evident in Chinese longsnout catfish. The expression levels and enzymic activity of hepatic pyruvate kinase increased in grass carp, but no significant changes were observed in the Chinese longsnout catfish. Glycogen synthase (gys) and glycogen phosphorylase (gp) were induced in grass carp. However, there was no significant change in gys and a clear down-regulation of gp in Chinese longsnout catfish. In brief, compared with Chinese longsnout catfish, grass carp exhibited a rapid increase and faster clearance rate of plasma glucose. This effect was closely related to significantly enhanced levels of digestion, glycolysis, glycogen metabolism and glucose-induced lipogenesis in grass carp, as well as the inhibition of gluconeogenesis"
Keywords:		"Administration, Oral Animals Carps/*metabolism Catfishes/*metabolism Gene Expression Regulation/drug effects Gluconeogenesis/drug effects Glucose/*metabolism Homeostasis/*drug effects Humans Liver/drug effects/metabolism Starch/*administration & dosage Am;"
Notes:		"MedlineSu, Jingzhi Gong, Yulong Mei, Lingyu Xi, Longwei Chi, Shuyan Yang, Yunxia Jin, Junyan Liu, Haokun Zhu, Xiaoming Xie, Shouqi Han, Dong eng Research Support, Non-U.S. Gov't England 2019/12/10 Br J Nutr. 2020 Mar 28; 123(6):627-641. doi: 10.1017/S0007114519003234. Epub 2019 Dec 9"