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Regulation of genes related to cholesterol metabolism in rainbow trout (Oncorhynchus mykiss) fed a plant-based diet.
Zhu, Tengfei; Corraze, Geneviève; Plagnes-Juan, Elisabeth; Quillet, Edwige; Dupont-Nivet, Mathilde; Skiba-Cassy, Sandrine.
Affiliation
  • Zhu T; Institut National de la Recherche Agronomique, Unité Mixte de Recherche, Joint Research Unit 1419, Nutrition Métabolisme Aquaculture, Saint Pée-sur-Nivelle, France.
  • Corraze G; Institut National de la Recherche Agronomique, Unité Mixte de Recherche, Joint Research Unit 1419, Nutrition Métabolisme Aquaculture, Saint Pée-sur-Nivelle, France.
  • Plagnes-Juan E; Institut National de la Recherche Agronomique, Unité Mixte de Recherche, Joint Research Unit 1419, Nutrition Métabolisme Aquaculture, Saint Pée-sur-Nivelle, France.
  • Quillet E; Génétique Animale et Biologie Intégrative, Institut National de la Recherche Agronomique, AgroParisTech, Université Paris-Saclay, Jouy-en-Josas, France.
  • Dupont-Nivet M; Génétique Animale et Biologie Intégrative, Institut National de la Recherche Agronomique, AgroParisTech, Université Paris-Saclay, Jouy-en-Josas, France.
  • Skiba-Cassy S; Institut National de la Recherche Agronomique, Unité Mixte de Recherche, Joint Research Unit 1419, Nutrition Métabolisme Aquaculture, Saint Pée-sur-Nivelle, France.
Am J Physiol Regul Integr Comp Physiol ; 314(1): R58-R70, 2018 01 01.
Article in En | MEDLINE | ID: mdl-28931545
ABSTRACT
When compared with fish meal and fish oil, plant ingredients differ not only in their protein content and amino acid and fatty acid profiles but are also devoid of cholesterol, the major component of cell membrane and precursor of several bioactive compounds. Based on these nutritional characteristics, plant-based diets can affect fish physiology and cholesterol metabolism. To investigate the mechanisms underlying cholesterol homeostasis, rainbow trout were fed from 1 g body wt for 6 mo with a totally plant-based diet (V), a marine diet (M), and a marine-restricted diet (MR), with feed intake adjusted to that of the V group. The expression of genes involved in cholesterol synthesis, esterification, excretion, bile acid synthesis, and cholesterol efflux was measured in liver. Results showed that genes involved in cholesterol synthesis were upregulated in trout fed the V diet, whereas expression of genes related to bile acid synthesis ( cyp7a1) and cholesterol elimination ( abcg8) were reduced. Feeding trout the V diet also enhanced the expression of srebp-2 while reducing that of lxrα and miR-223. Overall, these data suggested that rainbow trout coped with the altered nutritional characteristics and absence of dietary cholesterol supply by increasing cholesterol synthesis and limiting cholesterol efflux through molecular mechanisms involving at least srebp-2, lxrα, and miR-223. However, plasma and body cholesterol levels in trout fed the V diet were lower than in fish fed the M diet, raising the question of the role of cholesterol in the negative effect of plant-based diet on growth.
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Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Diet, Vegetarian / Cholesterol / Oncorhynchus mykiss / Fish Proteins / Lipid Metabolism / Animal Feed / Animal Nutritional Physiological Phenomena Limits: Animals Language: En Journal: Am J Physiol Regul Integr Comp Physiol Journal subject: FISIOLOGIA Year: 2018 Type: Article Affiliation country: France

Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Diet, Vegetarian / Cholesterol / Oncorhynchus mykiss / Fish Proteins / Lipid Metabolism / Animal Feed / Animal Nutritional Physiological Phenomena Limits: Animals Language: En Journal: Am J Physiol Regul Integr Comp Physiol Journal subject: FISIOLOGIA Year: 2018 Type: Article Affiliation country: France