title: Action of robenidine on the intestinal transport and digestion of nutrients in rabbit.
abstract: Robenidine is an anticoccidial guanidine used as an additive in rabbit fodder. Because its action is restricted to the small intestine, the present work addresses the question whether robenidine affects the growth of the animals, sugar and amino acid intestinal transport and membrane-bound intestinal digestion. For this purpose we have determined the intestinal transport of the substrates, and the enzymatic activity of neutral aminopeptidase and sucrase. We have found that robenidine diminishes the tissue accumulation of L-leucine and D-galactose at long incubation times, and increases the transepithelial mucosal to serosal flux of both substrates. These results suggest that robenidine may stimulate the enterocyte basolateral membrane flux of sugars and neutral amino acids. These results have been corroborated by means of isolated brush border and basolateral membrane vesicles. Apart from these effects, robenidine has also been shown to increase the enzymatic activity of neutral aminopeptidase and sucrase and thus resulting in a better digestion of nutrients.
authors.affiliation: Departamento de Fisiología y Farmacología, Universidad de Zaragoza, Facultad de Veterinaria, Spain.
authors.forename: V
authors.initials: V
authors.lastname: Sorribas
authors.forename: M P
authors.initials: MP
authors.lastname: Arruebo
authors.forename: F
authors.initials: F
authors.lastname: Alvarado
authors.forename: A I
authors.initials: AI
authors.lastname: Alcalde
mesh_terms: D000626:Aminopeptidases / Q000378:metabolism; D000818:Animals; D001692:Biological Transport / Q000187:drug effects; D004063:Digestion / Q000187:drug effects*; D004435:Eating / Q000187:drug effects; D004789:Enzyme Activation / Q000187:drug effects; D005690:Galactose / Q000378:metabolism; D005947:Glucose / Q000378:metabolism; D066298:In Vitro Techniques; D007408:Intestinal Absorption / Q000187:drug effects*; D007413:Intestinal Mucosa / Q000187:drug effects / Q000378:metabolism; D007421:Intestine, Small / Q000166:cytology / Q000187:drug effects* / Q000378:metabolism; D007583:Jejunum / Q000187:drug effects; D007930:Leucine / Q000378:metabolism; D008297:Male; D008871:Microvilli / Q000187:drug effects / Q000378:metabolism; D011817:Rabbits; D012370:Robenidine / Q000494:pharmacology*; D013393:Sucrase / Q000378:metabolism
chemical_list: D012370:Robenidine; D013393:Sucrase; D000626:Aminopeptidases; D007930:Leucine; D005947:Glucose; D005690:Galactose