Acute dietary PCPA treatment decreases the KD of brain [3H]5-HT binding in rainbow trout, Oncorhynchus mykiss, fed a high carbohydrate diet

1994 ◽  
Vol 107 (3) ◽  
pp. 455-461 ◽  
Author(s):  
W.L. Johnston ◽  
N.T. Glanville
Keyword(s):  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
High Carbohydrate Diet ◽  
Carbohydrate Diet ◽  
High Carbohydrate ◽  
Rainbow Trout Oncorhynchus Mykiss

scholarly journals New insights into the nutritional regulation of gluconeogenesis in carnivorous rainbow trout (Oncorhynchus mykiss): a gene duplication trail

2015 ◽  
Vol 47 (7) ◽  
pp. 253-263 ◽  
Author(s):  
Lucie Marandel ◽  
Iban Seiliez ◽  
Vincent Véron ◽  
Sandrine Skiba-Cassy ◽  
Stéphane Panserat
Keyword(s):  
Rainbow Trout ◽  
Gene Duplication ◽  
Oncorhynchus Mykiss ◽  
High Carbohydrate Diet ◽  
Evolutionary Analysis ◽  
Nutritional Regulation ◽  
Dietary Carbohydrates ◽  
Carbohydrate Diet ◽  
High Carbohydrate ◽  
Rainbow Trout Oncorhynchus Mykiss

The rainbow trout ( Oncorhynchus mykiss) is considered to be a strictly carnivorous fish species that is metabolically adapted for high catabolism of proteins and low utilization of dietary carbohydrates. This species consequently has a “glucose-intolerant” phenotype manifested by persistent hyperglycemia when fed a high-carbohydrate diet. Gluconeogenesis in adult fish is also poorly, if ever, regulated by carbohydrates, suggesting that this metabolic pathway is involved in this specific phenotype. In this study, we hypothesized that the fate of duplicated genes after the salmonid-specific 4th whole genome duplication (Ss4R) may have led to adaptive innovation and that their study might provide new elements to enhance our understanding of gluconeogenesis and poor dietary carbohydrate use in this species. Our evolutionary analysis of gluconeogenic genes revealed that pck1, pck2, fbp1a, and g6pca were retained as singletons after Ss4r, while g6pcb1, g6pcb2, and fbp1b ohnolog pairs were maintained. For all genes, duplication may have led to sub- or neofunctionalization. Expression profiles suggest that the gluconeogenesis pathway remained active in trout fed a no-carbohydrate diet. When trout were fed a high-carbohydrate diet (30%), most of the gluconeogenic genes were non- or downregulated, except for g6pbc2 ohnologs, whose RNA levels were surprisingly increased. This study demonstrates that Ss4R in trout involved adaptive innovation via gene duplication and via the outcome of the resulting ohnologs. Indeed, maintenance of ohnologous g6pcb2 pair may contribute in a significant way to the glucose-intolerant phenotype of trout and may partially explain its poor use of dietary carbohydrates.

scholarly journals Apparent low ability of liver and muscle to adapt to variation of dietary carbohydrate:protein ratio in rainbow trout (Oncorhynchus mykiss)

2012 ◽  
Vol 109 (8) ◽  
pp. 1359-1372 ◽  
Author(s):  
Sandrine Skiba-Cassy ◽  
Stéphane Panserat ◽  
Mélanie Larquier ◽  
Karine Dias ◽  
Anne Surget ◽  
...  
Keyword(s):  
Rainbow Trout ◽  
Amino Acid ◽  
Oncorhynchus Mykiss ◽  
Translation Initiation Factor ◽  
Initiation Factor ◽  
Futile Cycle ◽  
High Carbohydrate ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Low Protein ◽  
Expression Of Genes

The rainbow trout (Oncorhynchus mykiss) exhibits high dietary amino acid requirements and an apparent inefficiency to use dietary carbohydrates. Using this species, we investigated the metabolic consequences of long-term high carbohydrates/low protein feeding. Fish were fed two experimental diets containing either 20 % carbohydrates/50 % proteins (C20P50), or high levels of carbohydrates at the expense of proteins (35 % carbohydrates/35 % proteins – C35P35). The expression of genes related to hepatic and muscle glycolysis (glucokinase (GK), pyruvate kinase and hexokinase) illustrates the poor utilisation of carbohydrates irrespective of their dietary levels. The increased postprandial GK activity and the absence of inhibition of the gluconeogenic enzyme glucose-6-phosphatase activity support the hypothesis of the existence of a futile cycle around glucose phosphorylation extending postprandial hyperglycaemia. After 9 weeks of feeding, the C35P35-fed trout displayed lower body weight and feed efficiency and reduced protein and fat gains than those fed C20P50. The reduced activation of eukaryotic translation initiation factor 4-E binding protein 1 (4E-BP1) in the muscle in this C35P35 group suggests a reduction in protein synthesis, possibly contributing to the reduction in N gain. An increase in the dietary carbohydrate:protein ratio decreased the expression of genes involved in amino acid catabolism (serine dehydratase and branched-chain α-keto acid dehydrogenase E1α and E1β), and increased that of carnitine palmitoyltransferase 1, suggesting a higher reliance on lipids as energy source in fish fed high-carbohydrate and low-protein diets. This probably also contributes to the lower fat gain. Together, these results show that different metabolic pathways are affected by a high-carbohydrate/low-protein diet in rainbow trout.

scholarly journals Cinnamon Promotes Growth Performance, Digestive Enzyme, Blood Parameters, and Antioxidant Activity of Rainbow Trout (Oncorhynchus mykiss) in Low-Carbohydrate Diets

2021 ◽  
Vol 21 (07) ◽  
pp. 309-322
Author(s):  
Mitra Ravardshiri ◽  
Somayeh Bahram ◽  
Seyed Rohollah Javadian ◽  
Masoumeh Bahrekazemi
Keyword(s):  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Digestive Enzyme ◽  
Density Lipoprotein ◽  
Blood Parameters ◽  
Control Group ◽  
Carbohydrate Diet ◽  
Low Carbohydrate Diet ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Low Carbohydrate

This study was conducted to investigate the effect of cinnamon in high- and low carbohydrate diets on the physiology of rainbow trout (Oncorhynchus mykiss (16.12±1.33 g). Six experimental diets including control/LCarb (200 g/kg carbohydrate), LCarb-3C (200 g/kg carbohydrate, 30 g/kg cinnamon), LCarb-5C (200g/kg carbohydrate, 50 g/kg cinnamon), HCarb (300 g/kg carbohydrate), HCarb-3C (300 g/kg carbohydrate, 30 g/kg cinnamon), and HCarb-5C (300 g/kg carbohydrate, 50 g/kg cinnamon) were formulated to feed fish for eight weeks. The results showed that fish fed dietary LCarb-3C (72.64 g) and LCarb-5C (73.17 g) had higher weight gain as compared with treatments without cinnamon (P<0.05). Blood performance in LCarb3C (67.10) was significantly higher than the HCarb-3C group (P<0.05). Fish fed dietary LCarb-3C had the best performance so that cinnamon in this group lowered glucose, total cholesterol, and low-density lipoprotein, improved total protein, and highdensity lipoprotein contents. Supplementation of this herb also improved protease and lipase in LCarb-3C and LCarb-5C groups as compared with control. Individuals fed supplemented diets but not HCarb had a higher superoxide dismutase activity when compared with the control group (P<0.05). Generally, cinnamon improved parameters in this study in fish fed a low-carbohydrate diet rather than a high-carbohydrate diet.

scholarly journals Exploring the Impact of a Low-Protein High-Carbohydrate Diet in Mature Broodstock of a Glucose-Intolerant Teleost, the Rainbow Trout

2020 ◽  
Vol 11 ◽  
Author(s):  
Thérèse Callet ◽  
Huihua Hu ◽  
Laurence Larroquet ◽  
Anne Surget ◽  
Jingwei Liu ◽  
...  
Keyword(s):  
Rainbow Trout ◽  
High Carbohydrate Diet ◽  
Carbohydrate Diet ◽  
High Carbohydrate ◽  
Low Protein ◽  
The Impact

scholarly journals The effect of dietary composition and of insulin on gluconeogenesis in rainbow trout (Salmo gairdneri)

1977 ◽  
Vol 38 (3) ◽  
pp. 385-395 ◽  
Author(s):  
C. B. Cowey ◽  
M. De La Higuera ◽  
J. W. Adron
Keyword(s):  
Rainbow Trout ◽  
High Protein Diet ◽  
High Carbohydrate Diet ◽  
High Protein ◽  
Protein Diet ◽  
Salmo Gairdneri ◽  
Carbohydrate Diet ◽  
Commercial Diet ◽  
High Carbohydrate ◽  
Gluconeogenesis From Alanine

1. The activities at 15° of three gluconeogenic enzymes, d-fructose-1,6-diphosphate, 1-phosphohydrolase (EC 3.1.3.11), pyruvate carboxylase (EC 6.4.1.1) and phosphoenolpyruvate carboxykinase (4.1.1.32), were determined in liver, kidney, gill and muscle of rainbow trout (Salmo gairdneri) given a commercial diet. The results indicated that liver and kidney are the main sites of gluconeogenesis.2. Glucose formation from pyruvate was approximately 6 μmol/h per g wet weight at 15° in liver slices of trout given a commercial diet.3. Glucose diffusion space in trout was measured by the dilution principle after intravascular injection of a trace dose of [U-14C]glucose. Glucose space was found to be 13.7% of the body-weight. Gluconeogenesis in vivo amounted to approximately 45 μmol/kg body-weight per h.4. Intraperitoneally injected [U-14C]alanine was quickly converted to glucose. Maximal incorporation of alanine into glucose occurred 6 h after alanine administration.5. Rainbow trout given a high-protein diet gained in weight significantly during a 4-week period. Those given a high-carbohydrate diet did not make a significant weight gain over the same period. Gluconeogenesis from alanine was markedly reduced in fish given the high-carbohydrate diet. There was no significant difference in gluconeogenesis from alanine in fish given a high-protein diet and fish which were fasted for 21 d.6. Gluconeogenesis from alanine in trout was suppressed by intravenous injection of insulin. This effect was found both in trout given a high-protein diet and in fasted trout.

scholarly journals Short-Term Effect of a Low-Protein High-Carbohydrate Diet on Mature Female and Male, and Neomale Rainbow Trout

2021 ◽  
Vol 22 (11) ◽  
pp. 6149
Author(s):  
Nathan Favalier ◽  
Vincent Véron ◽  
Michael Marchand ◽  
Anne Surget ◽  
Patrick Maunas ◽  
...  
Keyword(s):  
Rainbow Trout ◽  
Lipid Metabolism ◽  
Mature Female ◽  
High Carbohydrate Diet ◽  
Short Term ◽  
Carbohydrate Diet ◽  
High Carbohydrate ◽  
Glucose And Lipid Metabolism ◽  
Low Protein ◽  
First Time

Rainbow trout are considered as a poor user of dietary carbohydrates, displaying persistent postprandial hyperglycaemia when fed a diet containing high amounts of carbohydrates. While this phenotype is well-described in juveniles, less attention was given to broodstock. Our objective was to assess for the first time the short-term consequences of feeding mature female and male, and neomale trout with a low-protein high-carbohydrate diet on glucose and lipid metabolism. Fish were fed for two days with a diet containing either no or 32% of carbohydrates. We analysed plasma metabolites, mRNA levels and enzymatic activities of glycolysis, gluconeogenesis, de novo lipogenesis and β-oxidation in the liver. Results demonstrated that the glucose and lipid metabolism were regulated by the nutritional status in all sexes, irrespective of the carbohydrate intake. These data point out that carbohydrate intake during a short period (5 meals) at 8 °C did not induce specific metabolic changes in broodstock. Finally, we demonstrated, for the first time, sex differences regarding the consequences of two days of feeding on glucose and lipid metabolism.

scholarly journals Modulation of Energy Metabolism and Epigenetic Landscape in Rainbow Trout Fry by a Parental Low Protein/High Carbohydrate Diet

Biology ◽  
2021 ◽  
Vol 10 (7) ◽  
pp. 585
Author(s):  
Thérèse Callet ◽  
Hongyan Li ◽  
Pascale Coste ◽  
Stéphane Glise ◽  
Cécile Heraud ◽  
...  
Keyword(s):  
Rainbow Trout ◽  
Energy Metabolism ◽  
Mitochondrial Dynamics ◽  
Control Diet ◽  
Epigenetic Landscape ◽  
Carbohydrate Diet ◽  
High Carbohydrate ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
First Feeding ◽  
Low Protein

It is now recognized that parental diets could highly affect offspring metabolism and growth. Studies in fish are, however, lacking. In particular, the effect of a parental diet high in carbohydrate (HC) and low in protein (LP) on progeny has never been examined in higher trophic level teleost fish. Thus, two-year old male and female rainbow trout (Oncorhynchus mykiss) were fed either a control diet (0% carbohydrate and 63.89% protein) or a diet containing 35% carbohydrate and 42.96% protein (HC/LP) for a complete reproductive cycle for females and over a 5-month period for males. Cross-fertilizations were then carried out. To evaluate the effect of the parental diet on their offspring, different phenotypic and metabolic traits were recorded for offspring before their first feeding and again three weeks later. When considering the paternal and maternal HC/LP nutrition independently, fry phenotypes and transcriptomes were only slightly affected. The combination of the maternal and paternal HC/LP diets altered the energy metabolism and mitochondrial dynamics of their progeny, demonstrating the existence of a synergistic effect. The global DNA methylation of whole fry was also highly affected by the HC/LP parental diet, indicating that it could be one of the fundamental mechanisms responsible for the effects of nutritional programming.

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