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Pubmed ID :30114450
Publication Date : //

Evidence for leptin receptor immunoreactivity in the gastrointestinal tract and gastric leptin regulation in the rainbow trout (Oncorhynchus mykiss).


In this study, evidence for leptin receptor (LR) and gastric leptin immunoreactivity along the digestive tract of the rainbow trout (Oncorhynchus mykiss), is reported. Besides this, the regulation of gastric leptin and its transcript by fatty acids was analyzed in vitro. LR was detected mainly in the cells of the stomach gastric glands and in the brush border of the epithelium of the anterior, middle and distal intestine. In the stomach LR was co-distributed with leptin. The regulation of gastric leptin and its transcript by fatty acids was analyzed by in vitro incubations. Rabbit polyclonal antibodies anti rainbow trout leptin were developed and employed to detect leptin concentration in the stomach and in the incubation medium. Stomach slices were incubated with butyric (4:0), oleic (18:1n-9), α-linolenic (18:3n-3) and arachidonic fatty acids (20:4n-6). All fatty acids caused an increase in the protein in both the stomach and culture medium, while leptin transcript was not modified. Overall, the results confirm the gastric leptin release upon nutritional modulation.

Authors : Imperatore Roberta , Coccia Elena , D'Angelo Livia , Varricchio Ettore , De Girolamo Paolo , Paolucci Marina ,

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