Evidence that ghrelin may be associated with the food intake of gibel carp (Carassius auratus gibelio).
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.
Department of Aquaculture, Department of Fisheries, Southwest University, Rongchang Campus, 402460, Chongqing, China. zcwlzq666@163.com.
Chaowei
C
Zhou
Department of Aquaculture, Department of Fisheries, Southwest University, Rongchang Campus, 402460, Chongqing, China.
Jinfa
J
Zheng
Department of Aquaculture, Department of Fisheries, Southwest University, Rongchang Campus, 402460, Chongqing, China.
Luo
L
Lei
Department of Aquaculture, College of Life Sciences, Neijiang Normal University, 641000, Neijiang, Sichuan, China.
Dengyue
D
Yuan
Department of Aquaculture, Department of Fisheries, Southwest University, Rongchang Campus, 402460, Chongqing, China.
Chengke
C
Zhu
Department of Aquaculture, Department of Fisheries, Southwest University, Rongchang Campus, 402460, Chongqing, China.
Hua
H
Ye
Tibet Academy of Agricultural and Animal Husbandry Sciences, 850002, Lhasa, Tibet, China.
Chi
C
Zhang
Department of Aquaculture, Department of Fisheries, Southwest University, Rongchang Campus, 402460, Chongqing, China.
Dan
D
Wang
Department of Aquaculture, Department of Fisheries, Southwest University, Rongchang Campus, 402460, Chongqing, China.
Minmin
M
Yang
Department of Aquaculture, Department of Fisheries, Southwest University, Rongchang Campus, 402460, Chongqing, China.
Jingjing
J
Wu
Department of Aquaculture, Department of Fisheries, Southwest University, Rongchang Campus, 402460, Chongqing, China.
Long
L
Zhu
Department of Aquaculture, Department of Fisheries, Southwest University, Rongchang Campus, 402460, Chongqing, China.
Benhe
B
Zeng
D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D003001:Cloning, Molecular; D018076:DNA, Complementary / Q000235:genetics; D004435:Eating / Q000502:physiology*; D005247:Feeding Behavior / Q000502:physiology; D005508:Food Deprivation; D054439:Ghrelin / Q000235:genetics / Q000502:physiology*; D006054:Goldfish / Q000502:physiology*; D010802:Phylogeny; D019518:Postprandial Period / Q000235:genetics; D012333:RNA, Messenger / Q000378:metabolism
D018076:DNA, Complementary; D054439:Ghrelin; D012333:RNA, Messenger
Appetite regulation; Ghrelin; Gibel carp; Tissue expression