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Effects of diets containing proteins from fish muscles or fish by-products on the circulating cholesterol concentration in rodents: a systematic review and meta-analysis. Br J Nutr 2022:1-22. [PMID: 36268726 DOI: 10.1017/s000711452200349x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
A high circulating cholesterol concentration is considered an important risk factor for the development of CVD. Since lean fish intake and fish protein supplementation have been associated with lower cholesterol concentration in some but not all clinical studies, the main aim of this study was to investigate the effect of diets containing proteins from fish muscles and fish by-products on the serum/plasma total cholesterol (TC) concentration in rodents. A systematic literature search was performed using the databases PubMed, Web of Science and Embase, structured around the population (rodents), intervention (type of fish and fraction, protein dose and duration), comparator (casein) and the primary outcome (circulating TC). Articles were assessed for risk of bias using the SYRCLE's tool. A meta-analysis was conducted in Review Manager v. 5·4·1 (the Cochrane Collaboration) to determine the effectiveness of proteins from fish on the circulating TC concentration. Thirty-nine articles were included in the systematic review and meta-analysis, with data from 935 rodents. The risk of bias is unclear since few of the entries in the SYRCLE's tool were addressed. Consumption of proteins from fish resulted in a significantly lower circulating TC concentration when compared with control groups (mean difference -0·24 mmol/l, 95 % CI - 0·34, -0·15, P < 0·00001), with high statistical heterogeneity (I2 = 71 %). To conclude, proteins from fish muscles and by-products show promise as a functional dietary ingredient or supplement by preventing high cholesterol concentration in rodents, thus reducing one of the most important risk factors for developing CVD.
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Bratlie M, Hagen IV, Helland A, Erchinger F, Midttun Ø, Ueland PM, Rosenlund G, Sveier H, Mellgren G, Hausken T, Gudbrandsen OA. Effects of high intake of cod or salmon on gut microbiota profile, faecal output and serum concentrations of lipids and bile acids in overweight adults: a randomised clinical trial. Eur J Nutr 2021; 60:2231-2248. [PMID: 33108521 PMCID: PMC8137623 DOI: 10.1007/s00394-020-02417-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2020] [Accepted: 10/13/2020] [Indexed: 12/12/2022]
Abstract
PURPOSE To explore whether high intake of cod or salmon would affect gut microbiota profile, faecal output and serum concentrations of lipids and bile acids. METHODS Seventy-six adults with overweight/obesity with no reported gastrointestinal disease were randomly assigned to consume 750 g/week of either cod or salmon, or to avoid fish intake (Control group) for 8 weeks. Fifteen participants from each group were randomly selected for 72 h faeces collection at baseline and end point for gut microbiota profile analyses using 54 bacterial DNA probes. Food intake was registered, and fasting serum and morning urine were collected at baseline and end point. RESULTS Sixty-five participants were included in serum and urine analyses, and gut microbiota profile was analysed for 33 participants. Principal component analysis of gut microbiota showed an almost complete separation of the Salmon group from the Control group, with lower counts for bacteria in the Bacteroidetes phylum and the Clostridiales order of the Firmicutes phyla, and higher counts for bacteria in the Selenomonadales order of the Firmicutes phylum. The Cod group showed greater similarity to the Salmon group than to the Control group. Intake of fibres, proteins, fats and carbohydrates, faecal daily mass and output of fat, cholesterol and total bile acids, and serum concentrations of cholesterol, triacylglycerols, non-esterified fatty acids and total bile acids were not altered in the experimental groups. CONCLUSION A high intake of cod or salmon fillet modulated gut microbiota but did not affect faecal output or serum concentrations of lipids and total bile acids. CLINICAL TRIAL REGISTRATION This trial was registered at clinicaltrials.gov as NCT02350595.
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Affiliation(s)
- Marianne Bratlie
- Dietary Protein Research Group, Department of Clinical Medicine, Haukeland University Hospital, University of Bergen, 5021, Bergen, Norway
| | - Ingrid V Hagen
- Dietary Protein Research Group, Department of Clinical Medicine, Haukeland University Hospital, University of Bergen, 5021, Bergen, Norway
| | - Anita Helland
- Dietary Protein Research Group, Department of Clinical Medicine, Haukeland University Hospital, University of Bergen, 5021, Bergen, Norway
| | | | | | | | - Grethe Rosenlund
- Skretting Aquaculture Research Centre AS, P.O. Box 48, 4001, Stavanger, Norway
| | - Harald Sveier
- Lerøy Seafood Group ASA, P.O. Box 7600, 5020, Bergen, Norway
| | - Gunnar Mellgren
- Mohn Nutrition Research Laboratory, Department of Clinical Science, Haukeland University Hospital, University of Bergen, 5021, Bergen, Norway
- Hormone Laboratory, Haukeland University Hospital, 5021, Bergen, Norway
| | - Trygve Hausken
- Department of Clinical Medicine, University of Bergen, Bergen, Norway
- Section of Gastroenterology, Department of Medicine, Haukeland University Hospital, Bergen, Norway
| | - Oddrun Anita Gudbrandsen
- Dietary Protein Research Group, Department of Clinical Medicine, Haukeland University Hospital, University of Bergen, 5021, Bergen, Norway.
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Urine and plasma concentrations of amino acids and plasma vitamin status differ, and are differently affected by salmon intake, in obese Zucker fa/fa rats with impaired kidney function and in Long-Evans rats with healthy kidneys. Br J Nutr 2019; 122:262-273. [DOI: 10.1017/s0007114519001284] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
AbstractKidney function affects amino acid metabolism and vitamin status. The aims of the present study were to investigate urine and plasma concentrations of amino acids as well as plasma vitamin status in rats with impaired renal function (Zucker fa/fa rats) and in rats with normal kidney function (Long-Evans rats), and to explore the effects of salmon intake on these parameters and potential biomarkers of salmon intake in both rat strains. Male rats were fed diets with casein as sole protein source (control diet) or 25 % protein from baked salmon and 75 % casein for 4 weeks. Urine concentrations of markers of renal function and most amino acids and plasma concentrations of most vitamins were higher, and plasma concentrations of several amino acids including arginine, total glutathione and most tryptophan metabolites were lower in Zucker fa/fa rats compared with Long-Evans rats fed the control diet. Concentrations of kidney function markers were lower after salmon intake only in Zucker fa/fa rats. A trend towards lower urine concentrations of amino acids was seen in both rat strains fed the salmon diet, but this was more pronounced in Long-Evans rats and did not reflect the dietary amino acid content. Urine 1-methylhistidine, 3-methylhistidine, trimethylamineoxide and creatine concentrations, and plasma 1-methylhistidine and creatine concentrations were higher after salmon intake in both rat strains. To conclude, concentrations of amino acids in urine and plasma as well as vitamin status were different in Zucker fa/fa and Long-Evans rats, and the effects of salmon intake differed by rat strain for some of these parameters.
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Salmon Fillet Intake Led to Higher Serum Triacylglycerol in Obese Zucker Fa/Fa Rats But Not in Normolipidemic Long-Evans Rats. Nutrients 2018; 10:nu10101459. [PMID: 30297656 PMCID: PMC6213735 DOI: 10.3390/nu10101459] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Revised: 09/20/2018] [Accepted: 10/01/2018] [Indexed: 12/02/2022] Open
Abstract
The triacylglycerol lowering effect of fatty fish and fish oils is well recognized, however we recently showed that salmon intake resulted in higher serum triacylglycerol concentration in obese Zucker fa/fa rats. Since effects of salmon fillet have never before been studied in rats, the objective of this study was to compare effects of salmon intake on serum lipids in hyperlipidemic obese rats with normolipidemic lean rats. Zucker fa/fa rats and Long-Evans rats were fed diets with 25% protein from baked salmon fillet and 75% protein from casein, or casein as sole protein source (control group) for four weeks. Serum triacylglycerol concentration was higher, and cholesterol and apolipoproteinB-100 concentrations were lower in Zucker fa/fa rats fed Baked Salmon Diet compared to Zucker fa/fa rats fed Control Diet, with no differences in serum triacylglycerol, cholesterol and apolipoproteinB-100 between Long-Evans rats fed Baked Salmon Diet or Control Diet. Serum triacylglycerol fatty acid composition showed greater similarities to dietary fatty acids in Zucker fa/fa rats than in Long-Evans rats. To conclude, intake of baked salmon fillet resulted in higher serum triacylglycerol concentration and lower serum cholesterol concentration in hyperlipidemic obese Zucker fa/fa rats but did not affect serum lipids in normolipidemic lean Long-Evans rats.
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Vikøren LA, Drotningsvik A, Bergseth MT, Mjøs SA, Austgulen MH, Mellgren G, Gudbrandsen OA. Intake of Baked Cod Fillet Resulted in Lower Serum Cholesterol and Higher Long Chain n-3 PUFA Concentrations in Serum and Tissues in Hypercholesterolemic Obese Zucker fa/fa Rats. Nutrients 2018; 10:E840. [PMID: 29958397 PMCID: PMC6073601 DOI: 10.3390/nu10070840] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Revised: 06/15/2018] [Accepted: 06/26/2018] [Indexed: 12/12/2022] Open
Abstract
Increasing evidence indicates that lean fish consumption may benefit cardiovascular health. High cholesterol and low n-3 PUFA concentrations in serum are associated with an increased risk of coronary heart disease; therefore, it is of interest to investigate effects of cod intake on cholesterol and n-3 PUFAs in serum and tissues. Hypercholesterolemic obese Zucker fa/fa rats were fed diets containing 25% protein from baked cod fillet and 75% protein from casein (Baked Cod Diet), or casein as the sole protein source (Control Diet) for four weeks. Consuming Baked Cod Diet resulted in lower serum cholesterol and lower hepatic mRNA concentrations of HMG-CoA reductase and sterol O-acyltransferase-2 without affecting serum bile acid concentration, faecal excretion of cholesterol and bile acid, and hepatic concentrations of bile acids, cholesterol and cholesterol 7 alpha-hydroxylase mRNA when compared to Control Diet. Rats fed Baked Cod Diet had higher concentrations of n-3 PUFAs in serum, liver, skeletal muscle and adipose tissue. To conclude, baked cod fillet intake resulted in lower serum cholesterol, which was probably caused by lower endogenous cholesterol synthesis, and higher n-3 PUFA in serum and tissues in obese Zucker fa/fa rats. These findings support the evidence that lean fish consumption might benefit cardiovascular health.
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Affiliation(s)
- Linn A Vikøren
- Dietary Protein Research Group, Department of Clinical Medicine, University of Bergen, 5021 Bergen, Norway.
- Department of Clinical Science, University of Bergen, 5021 Bergen, Norway.
| | - Aslaug Drotningsvik
- Dietary Protein Research Group, Department of Clinical Medicine, University of Bergen, 5021 Bergen, Norway.
| | - Marthe T Bergseth
- Dietary Protein Research Group, Department of Clinical Medicine, University of Bergen, 5021 Bergen, Norway.
| | - Svein A Mjøs
- Department of Chemistry, University of Bergen, P.O. Box 7803, 5020 Bergen, Norway.
- Nofima BioLab, P.O. Box 1425 Oasen, 5828 Bergen, Norway.
| | - Maren H Austgulen
- Department of Clinical Science, University of Bergen, 5021 Bergen, Norway.
| | - Gunnar Mellgren
- Department of Clinical Science, KG Jebsen Center for Diabetes Research, University of Bergen, Haukeland University Hospital, 5021 Bergen, Norway.
- Hormone Laboratory, Haukeland University Hospital, 5021 Bergen, Norway.
| | - Oddrun A Gudbrandsen
- Dietary Protein Research Group, Department of Clinical Medicine, University of Bergen, 5021 Bergen, Norway.
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Vikøren LA, Drotningsvik A, Mwakimonga A, Leh S, Mellgren G, Gudbrandsen OA. Diets containing salmon fillet delay development of high blood pressure and hyperfusion damage in kidneys in obese Zucker fa/fa rats. ACTA ACUST UNITED AC 2018; 12:294-302. [DOI: 10.1016/j.jash.2018.01.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2017] [Revised: 11/24/2017] [Accepted: 01/18/2018] [Indexed: 10/18/2022]
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