Fish Oil Group Research Articles

Efficacy of Palm Oil Application in Tiger Puffer Diets: Growth, Body Composition, Muscle Texture, and Lipid Metabolism

Palm oil, with its higher production, lower prices, and higher levels of palmitic acid and oleic acid, may have great potential for use in the aquafeed industry. In this study, with an 8‐week feeding experiment, the efficacy of palm oil as a substitute for fish oil in tiger puffer feeds was comprehensively evaluated. The control diets (FO group) contained 8% marine fish oil as the main lipid source, while in the treatment diets, the added marine fish oil was replaced with palm oil at 25%, 50%, 75%, and 100%, respectively, which was named 25PO, 50PO, 75PO, and 100PO, respectively. Juvenile tiger puffers with an initial weight of 15.0 ± 0.04 g were used, with three replicate tanks of 30 juvenile fish tiger puffer for each dietary group. The fish oil replacement by palm oil did not have an adverse effect on fish growth and feeding, but the weight gain decreased by 17.3% in group PO100. Palm oil had no significant effects on fish proximate composition and muscle texture. The effects of dietary palm oil on muscle fatty acid composition were not significant, with DHA and EPA significantly lowered only in the 100PO group. In contrast, the changes in liver and intestinal fatty acid compositions in response to diets were more significant than those in the muscle. In the intestine, the replacement of more than 50% fish oil by palm oil significantly downregulated the gene expression associated with peroxisomal fatty acid β‐oxidation and triglyceride hydrolysis, while upregulated the expression of cholesterol biosynthetic genes. In the liver, the replacement of more than 75% fish oil also significantly upregulated the cholesterol synthesis. In conclusion, palm oil can replace 75% of added marine fish oil in tiger puffer diets and does not adversely affect the growth performance, feed utilization, muscle composition, and muscle texture.

Pengaruh Minyak Ikan Dan Minyak Krill Terhadap Kadar Malondialdehid Pada Tikus Putih (Rattus novergicus) Hiperglikemik

Hyperglycemia is a condition due to glucose levels in the blood exceeding normal levels. Chronic hyperglycemia will result in increased production of free radicals resulting in oxidative stress. Malondialdehyde (MDA) is a free radical biomarker and oxidative stress in the body. Fish oil and krill oil are anti-inflammatory and antioxidant properties. This study aims to determine the effect of fish oil and krill oil on the levels of Malondialdehyde in Wistar White Rats (Rattus novergicus) hyperglycemic. This study uses a true experimental research type pre and post control. The samples in this study were 24 white wistar rats (Rattus norvegicus) which were divided into 4 groups each consisting of 6 mice, namely the negative control group was given a placebo, the positive control group was given glibenclamide, the fish oil group was given fish oil and the oil group krill was given intervention krill oil for 14 days. The mean malondialdehyde (MDA) levels in each group were negative control group 2.47 μmol / l, positive control group 2.13 μmol / l, fish oil group 1.29 μmol / l and irill oil group 0.77 μmol / l. Based on the results of the One way Anova analysis, a significant value of p less than 0.05 was obtained. Fish oil and krill oil have an effect on reducing levels of malondialdehyde. However, krill oil is more effective in reducing malondialdehyde levels than fish oil.

Sulforaphane alleviates oxidative stress induced by oxidized fish oil in Litopenaeus vannamei by involving antioxidant capacity, inflammation, autophagy, and apoptosis

Sulforaphane (SFN) is an antioxidant. Unsaturated fatty acids are rich in fish oil, and they are indispensable fatty acids for aquatic animals to grow and reproduce. However, fish oil is easily oxidized, which could have adverse effects on aquatic animals. In this study, Litopenaeus vannamei was divided into four groups: fresh fish oil group (control group), oxidized fish oil group (OFO group), OFO plus low-concentration SFN group (OFO + SL group), and OFO plus high-concentration SFN group (OFO + SH group). A 28-day experiment was conducted, and the antioxidant capacity, inflammation, autophagy, and pathological characteristics were investigated to explore whether SFN could protect L. vannamei from oxidative stress induced by OFO. Results showed that OFO significantly increased the contents of MDA in hepatopancreas, muscle and serum, while high concentrations of SFN significantly decreased the MDA compared with the OFO group (P < 0.05). OFO significantly affected the expression of SOD, CAT, GST and HSP 70 and increased the expression of inflammatory-related genes (TNF and spz). SFN downregulated the expression of TNF and spz, upregulate Nrf2, heat shock protein 70 (HSP 70) and autophagy genes (ATG4, ATG5, ATG10, and ATG12) and stabilized the expression of apoptosis-related genes (caspase 2, caspase 3, and JNK, P < 0.05). In addition, histological analysis of hepatopancreas showed that OFO led to cavitation in the lumen, and the existence of SFN reversed this phenomenon. OFO also result in the apoptosis of the hepatopancreas of L. vannamei, and the existence of high-concentration SFN reduced its apoptosis. In summary, SFN is involved in the regulation of antioxidant capacity, inflammation, autophagy, and apoptosis to alleviate the oxidative stress induced by OFO in L. vannamei.

Effect of Tea Polyphenols, α-Lipoic Acid and Their Joint Use on the Antioxidant and Lipid Metabolism Performance of Hybrid Grouper (♀Epinephelus fuscoguttatus × ♂E. lanceolatu) Fed with High-Lipid Diets.

This study investigated tea polyphenols (TP), α-lipoic acid (ALA) and their joint use on the antioxidant and lipid metabolic performance of hybrid grouper (♀Epinephelus fuscoguttatus × ♂E. lanceolatu) took food with high-fat diets. Six high-lipid diets with isonitrogen (50% of dry matter) and isolipid (17% of dry value) were designed, in which a total content of 1,000 mg/kg additives were added to each group except for the control group (FL). The additives addition ratios in each group were ALA (AL), TP (PL), ALA : TP = 1 : 1 (EL), ALA : TP = 1 : 2 (OL), ALA : TP = 2 : 1 (TL). Each diet was divided into three repeat groups with 30 tails (6.84 ± 0.01 g) in each group and fed for 8 weeks. The consequences were as follows: (1) the highest weight gain rate, specific growth rate, as well as the lowest feed conversion ratio and ingestion rate were discovered in the OL team, which were opposite to the TL group. (2) The body fat content and muscle fat content in the fish oil group were the lowest (P < 0.05), while those of the TL group were the highest. (3) Serum catalase, glutathione peroxidase, total antioxidant capacity, and superoxide dismutase activities were the highest, and the content of reactive oxygen species was the lowest in the OL group. (4) The OL group has the highest hepatic lipase activity and the lowest very low-density lipoprotein content of the liver. In contrast, the TL group had the highest fatty acid synthetase (FAS) activity (P < 0.05). (5) The oil-red aspects of liver tissue displayed lipid particles in other groups were reduced to different degrees compared with FL group, and the OL group showed the best lipid-lowering effect. (6) Compared with the FL group, the relative expressions of FAS, acetyl-CoA carboxylase (acc), and apolipoprotein b-100 (apoB100) genes in the liver were decreased. The relative expressions of lipoprotein lipase (lpl) and peroxisome proliferators-activated receptors-α (pparα) genes related to lipid catabolism were increased, among which the OL group had the most significant change (P < 0.05). (7) According to the 7-day challenge test of Vibrio alginolyticus, the OL group had the highest survival rate. To sum up, both ALA and TP have positive effects on relieving the lipid metabolism disorder of hybrid grouper. If they are jointly used, adding ALA : TP in a ratio of 1 : 2 (OL) may have the best effect, and an addition ratio of 2 : 1 (TL) may inhibit the hybrid grouper growth and increase the feeding cost.

Effects of fat source in calf starter on growth performance, blood fatty acid profiles, and inflammatory markers during cold season

This study was conducted to investigate the effects of supplementation of different fat sources in calf starters on growth performance, health, blood fatty acid profiles, and inflammatory markers during the cold season in dairy calves. A total of 48 Holstein calves (24 males and 24 females) were randomly assigned to 1 of 4 starter diets throughout the experiment (d 3 to 65): (1) no supplemented fat (CON), (2) 3% calcium-salts of soybean oil (Ca-SBO), (3) 3% calcium-salts of fish oil (Ca–FO), and (4) 3% mixture of Ca-SBO and Ca–FO (1.5% each, DM basis; MIX). Calves were given free access to starter feed and water and were raised individually in pens from 3 to 65 d of age. Calves fed Ca-SBO consumed a greater proportion of n-6 FA, while calves fed Ca–FO consumed a greater level of n-3 FA compared to the other dietary treatments. Fat supplementation increased the intake of linoleic acid, the major n-6 FA, with the greater intake observed in the Ca-SBO group compared to the other dietary treatments. Calves fed the Ca–FO and MIX diets consumed more long-chain n-3 FA than the other diets. In addition, calves fed Ca-SBO and Ca–FO diets consumed more starter feed and total dry matter than calves fed MIX and CON throughout the experiment (d 3 to 65). Calves fed Ca–FO had higher average daily gain throughout the trial (d 3 to 65) than the other treatment groups. Of all treatment groups, calves fed Ca–FO achieved the highest final body weight and showed the greatest feed efficiency. Random forest analysis revealed that eicosapentaenoic acid (EPA), docosahexaenoic acid (DHA), and arachidonic acid were the serum levels of FA most affected by the diets. The principal component analysis of blood FA profile, blood parameters, and inflammatory markers showed distinct differences between dietary treatments. Calves fed Ca-SBO had higher plasma concentrations of linoleic acid, while calves fed Ca–FO had higher plasma concentrations of long-chain n-3 polyunsaturated fatty acids (PUFA), such as EPA, docosapentaenoic acid (DPA), and DHA than the other treatment groups. Plasma inflammatory markers were lower in calves fed Ca–FO and higher in calves fed CON than in the other treatment groups. The Ca–FO group had lower levels of inflammatory markers, including serum amyloid A, tumor necrosis factor-alpha, Interferon-γ, haptoglobin, and interleukin-6 compared to the other experimental treatments. Also, the blood malondialdehyde levels, an indicator of oxidative stress, were lower in calves fed Ca–FO compared with calves fed the other treatment diets. In conclusion, the performance of preweaned dairy calves can be improved by adding fat to their starter feed under cold conditions. Overall, the type of fat in milk may affect growth and inflammation of dairy calves before weaning under cold conditions, with n-3 FA (Ca–FO) promoting growth and reducing inflammation more effectively than n-6 FA (Ca-SBO).

Effects of Varied Omega-3 Fatty Acid Supplementation on Postpartum Mental Health and the Association between Prenatal Erythrocyte Omega-3 Fatty Acid Levels and Postpartum Mental Health.

We investigated the postpartum mental health of women who had consumed perilla oil or fish oil containing various omega-3 fatty acids for 12 weeks starting in mid-pregnancy. The association between fatty acids in maternal erythrocytes and mental health risk factors was also examined. Healthy Japanese primiparas in mid-pregnancy (gestational weeks 18-25) were randomly divided into two groups and consumed approximately 2.0 g/day of omega-3 fatty acids in either perilla oil (the ALA dose was 2.4 g/day) or fish oil (the EPA + DHA dose was 1.7 g/day) for 12 weeks. Maternal mental health was assessed using the Edinburgh Postnatal Depression Scale (EPDS) as the primary measure and the Mother-to-Infant Bonding Scale (MIBS) as the secondary measure. Data from an observational study were used as a historical control. Maternal blood, cord blood, and colostrum samples were collected for fatty acid composition analysis. In addition, completers of the observational studies were enrolled in a case-control study, wherein logistic regression analysis was performed to examine the association between maternal fatty acids and EPDS score. The proportion of participants with a high EPDS score (≥9) was significantly lower in the perilla oil group (12.0%, p = 0.044) but not in the fish oil group (22.3%, p = 0.882) compared with the historical control (21.6%), while the proportions between the former groups also tended to be lower (p = 0.059). No marked effect of omega-3 fatty acid intake was observed from the MIBS results. In the case-control study of the historical control, high levels of α-linolenic acid in maternal erythrocytes were associated with an EPDS score of <9 (odds ratio of 0.23, 95% confidence interval: 0.06, 0.84, p = 0.018 for trend). The results of this study suggest that consumption of α-linolenic acid during pregnancy may stabilize postpartum mental health.

Krill oil showed a good application potential as the dietary lipid source on the growth, physiology, nutritional quality, and flavor of the edible meat of the oriental river prawns (Macrobrachium nipponense)

An 8-week feeding trial was conducted to evaluate the effects of dietary krill oil (KO), fish oil (FO) and soybean oil (SO) on growth, nutritional quality and flavor of the edible meat of the oriental river prawns (Macrobrachium nipponense). The results revealed that SO and KO diets promoted the growth performance (P < 0.05). The activity of alanine aminotransferase in hemolymph of the FO group was significantly lower than that in the SO group (P < 0.05). The contents of total cholesterol in hemolymph in the SO and FO groups were significantly lower than those in the KO group (P < 0.05). Superoxide dismutase activity and glutathione content in the hepatopancreas were the lowest in the SO group (P < 0.05). Lipoprtein lipase and trypsin activities of the hepatopancreas decreased significantly in the KO group (P < 0.05). Among the fatty acids in meat, the contents of eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) increased significantly in M. nipponense after feeding on animal lipid sources (FO and KO) (P < 0.05). The contents of umami and bitter free amino acids in the SO and KO groups were significantly higher than those in the FO group (P < 0.05), and the contents of adenosine monophosphate and inosine monophosphate were highest in the KO group (P < 0.05). The contents of bitter nucleotides hypoxanthine and hypoxanthine ribonucleoside were lowest in the KO group (P < 0.05). In general, compared with FO, the use of KO and SO as lipid sources in feed promoted the growth of M. nipponense, and KO significantly improved the antioxidant index of the hepatopancreas. FO and KO increased the contents of EPA and DHA in the edible meat of M. nipponense, and KO further enhanced the contents of amino acids and nucleotides responsible for flavor in the meat.

Fish oil supplementation as an omega-3 fatty acid source during gestation: effects on the performance of weaned male goat kids.

The aim of this study was to evaluate the effects of fish oil supplementation, as an omega-3 fatty acids source, to ration of does in the different periods of pregnancy on the fattening performance of kids after weaning. Eighty German Fawn × Hair crossbred does were randomly divided into two groups; half were given fish oil in the first half of pregnancy (FO group), while the other half were given saturated fat (PF (control) group). Then, the goats in the FO and PF groups were randomly divided into two subgroups, and half of the goats were fed fish oil during the second half of pregnancy (FO-FO and FO-PF groups), while the other half was fed saturated fat (PF-FO and PF-PF groups). Thus, study groups of kids were formed according to the nutrition program of the does described above. Forty-seven male kids (84.6 ± 2.44 days old; 14.5 ± 3.09 kg live weight, mean ± standard deviation) were fed for 56 days after weaning, and their weight, feed consumption, serum biochemical parameters, carcass performance, and meat quality characteristics were evaluated. Maternal nutrition significantly affected live weight gain and serum AST, glucose, total protein, and globulin concentrations (P ≤ 0.050). The live weight gain of kids in the PF-PF and PF-FO groups was higher than that in the FO-FO and FO-PF groups. Maternal nutrition tended to affect the hot and cold carcass weights of male kids (P = 0.078 and P = 0.084, respectively). In conclusion, fish oil supplementation during gestation could negatively affect the fattening performance of kids after weaning, especially the daily live weight gain, although it tended to positively affect hot and cold carcass weights.

Sterile Silicone Studs–A Nonpharmacologic Modality for Prevention of Hemodynamic Response to Skull Pin Insertion: A Pilot Study

Application of surgical skull pins causes hemodynamic fluctuations in neurosurgical procedures. To reduce this response, we describe the use of a novel nonpharmacologic method in the form of medical-grade sterile silicone studs to cushion the pressure of the skull pin in the adult population. This study aimed to evaluate the use of conventionally used fentanyl and medical-grade sterile silicone studs for the prevention of hemodynamic response to skull pin insertion. A prospective randomized pilot study was conducted of 20 adult patients categorized as American Society of Anesthesiologists class I and II scheduled for elective craniotomy in November 2022 in a tertiary-care hospital in Chandigarh, India. Patients were randomized into 2 groups: fentanyl only (FO group; n= 10) and medical-grade silicone studs (SS group; n= 10). Heart rate and mean arterial pressure were recorded at the following intervals: T1, baseline; T2, before induction; T3, after intubation; T4, before skull pin insertion; T5, T6, T7, T8, T9, and T10 at 0, 1, 3, 4, and 5 minutes after skull pin insertion. Demographic data (e.g., sex, age, disease pathology) were comparable between the groups. Although changes in heart rate between the 2 groups were comparable, there was a statistically significant decrease in mean arterial pressure from 1 minute to 5 minutes after pinning in patients with silicone studs compared with patients who received only fentanyl. The use of medical-grade silicone studs causes fewer hemodynamic fluctuations compared with fentanyl on skull pinning. Further studies with larger sample sizes are required to confirm the findings of this pilot study.

Effect of fish oil supplementation on the concentration of miRNA-122, FGF-21 and liver fibrosis in patients with NAFLD: Study protocol for a randomized, double-blind and placebo-controlled clinical trial

To date, no specific drugs are available for non-alcoholic fatty liver disease (NAFLD), though the effect of fish oil supplementation on improving fibrosis in patients with NAFLD has been evaluated. N-3 polyunsaturated fatty acids (n-3 PUFA) may modulate the concentration of microRNAs (miRNAs) and fibroblast growth factor (FGF)-21, which have been identified as non-invasive markers of liver fibrosis. The present study aims to evaluate whether n-3 PUFA supplementation can modulate miRNA-122 and FGF-21 and improve liver fibrosis and steatosis, measured by transient hepatic elastography (THE), in individuals with NAFLD. A randomized, double-blind, placebo-controlled clinical trial will be conducted to evaluate the effect of 4g/day supplementation of fish oil (2100mg EPA and 924mg DHA) in patients with NAFLD over a 6-month period. Fifty-two patients aged >19 years will be randomly assigned to either a placebo (olive oil) or treatment (fish oil) group. Anthropometric data, food intake, physical activity, body composition, resting energy expenditure (evaluated using indirect calorimetry), liver enzymes, platelets, lipids and glucose profile, inflammatory markers (such as C-reactive protein, neutrophil/lymphocyte, platelet/lymphocyte, and monocyte/lymphocyte ratios), miRNA-122 and FGF-21 concentration, and incorporation of fatty acids into the erythrocyte membrane (analyzed using gas chromatography) as well as the degree of liver fibrosis and steatosis assessed using THE (Fibroscan® Touch 502, Paris, France) and liver biomarkers Steato-Brazilian Longitudinal Study of Adult Health, Fatty Liver Index, NAFLD Fibrosis Score, Fibrosis-4 score, and FibroScan-AST score will be evaluated at the beginning and end of the treatment. Continuous variables with normal distribution will be compared between placebo and intervention groups using Student's T test for independent samples; continuous non-parametric variables will be compared using Dunn or Mann-Whitney test. Associations between categorical variables will be analyzed using the chi-square test, and within-group differences will be evaluated using the Wilcoxon signed-ranks test. The criterion for determining significance will be set at 5%. The present study protocol will investigate the supplementation of EPA-rich fish oil as an alternative treatment for NAFLD and its feasibility in affecting the concentration of miRNA-122 and FGF-21 markers. Its findings will offer valuable contributions to the literature. ReBEC number RBR-8dp876.

16S rRNA Sequencing Reveals the Antibacterial Effect of Omega-3 (Fish Oil) against Fibrolytic Bacteria, Altering Fermentation and Volatile Fatty Acids Profile In Vitro

Polyunsaturated fatty acids (PUFAs) constitute a significant lipid class with essential nutritional and health benefits for both animal and human health; however, their effect and interaction with the gut microbiota ecosystem are still unclear. Therefore, the present study aims to investigate the effect of fish oil (FO) on ruminal fermentation and bacterial abundance under high- and low-forage diets. Thirty-six ruminal fluid samples were allocated into two experiments. The first was on high-forage diet and included three groups: the control (basal diet with 70% forage and 30% concentrate), group 2 (basal diet + 5 mL/L FO), and group 3 (basal diet + 10 mL/L). The second experiment was on low-forage diet: the control (basal diet with 30% forage and 70% concentrate), group 2 (basal diet + 5 mL/L FO), and group 3 (basal diet + 10 mL/L). The results showed that although FO supplementation did not affect the pH level among different diets, it significantly decreased methane under a high-forage diet. In addition, regarding the fatty acids profile, FO supplementation in high-forage diet significantly decreased fatty acids in both; however, under a low-forage diet, FO groups showed significantly higher fatty acid content than the control. However, FO supplementation increased the abundance of Anaerovibirio, Selenomonas, pseudobutyrivibrio, and butyrivibrio through a high-forage diet. In contrast, the abundance of Prevotella, Rikenellaceae RC9 gut group, and Saccharofermentans was depressed with FO supplementation. Whereas under low-forage diet, FO supplementation increased Ruminobacter, Anaerovibirio, Megasphaera, Pseudobutyrivibrio, Streptococcus, Butyrivibrio, unclassified_lachnospiraceae; it also decreased Prevotella and Rikenellaceae RC9 abundance similar to the high-forage diet. Based on the KEGG pathway results, FO supplementation significantly downregulated genes mainly related to folding, sorting and degradation, environmental adaptation, cell motility, transcription, membrane transport, and signal transduction. The results revealed that FO has a depressing effect on ruminal fermentation and some bacterial population; however, this negative effect can be minimized in high-concentrate diets.

Dietary lysophospholipids improves growth performance and hepatic lipid metabolism of largemouth bass (Micropterussalmoides).

This study was conducted to evaluate the influence of dietary lysophospholipids combined with 1% dietary fish oil reduction on the growth performance and hepatic lipid metabolism of largemouth bass (Micropterus salmoides). Five isonitrogenous feeds were prepared with lysophospholipids at 0% (fish oil group, FO), 0.05% (L-0.05), 0.1% (L-0.1), 0.15% (L-0.15) and 0.2% (L-0.2), respectively. The dietary lipid was 11% in the FO diet and 10% in the other diets. Largemouth bass were fed for 68d (initial body weight=6.04±0.01g) with 4 replicates per group and 30 fish per replicate. The results showed that the fish fed diet containing 0.1% lysophospholipids had higher digestive enzyme activity and obtained better growth performance compared to the fish fed FO diet (P<0.05). The feed conversion rate in the L-0.1 group was significantly lower than that in the other groups. Serum total protein and triglyceride contents in L-0.1 group were significantly higher than those in other groups (P<0.05) and the contents of total cholesterol and low-density lipoprotein cholesterol in L-0.1 group were significantly lower than those in FO group (P<0.05). The activity and genes expression of hepatic glucolipid metabolizing enzymes in L-0.15 group were significantly increased compared to those in FO group (P<0.05). Reducing 1% fish oil along with 0.1% lysophospholipids added to the feed could improve the digestion and absorption of nutrients, enhance the activity of liver glycolipid metabolizing enzymes, and thus effectively promote the growth of largemouth bass.

Effects of vegetable oil replacement on intramuscular fat deposition and flesh quality of large yellow croaker (Larimichthys crocea) juveniles

The present study was conducted to investigate the effects of vegetable oil replacement on intramuscular fat deposition and flesh quality of large yellow croaker (Larimichthys crocea) juveniles. Five experiment diets were formulated with different vegetable oils substituting fish oil (fish oil group: FO, soybean oil group: SO, linseed oil group: LO, palm oil group: PO and olive oil group: OO). Juvenile large yellow croaker with an initial size of 6.04 ± 0.08 g were selected and randomly assigned to seawater cages (4 m × 4 m × 4 m). Each diet treatment was set up for three replicates, and 60 juvenile large yellow croaker were cultured in each replicate to carry out the experiment. The formal experiment lasted for 10 weeks, and the cultured fish was hand fed to apparent satiation twice daily at 6:00 am and 5:00 pm. During the experiment, the water temperature ranged from 19.3 °C to 22.8 °C, the salinity ranged from 25.6 to 29.9‰, and the dissolved oxygen level ranged from 6.3 to 7.4 mg/L. Results showed that compared with the FO group, the muscle triglyceride in SO, LO and PO group was significantly decreased (P < 0.05), which led to the significant up-regulations of muscle hardness, chewiness and gumminess (P < 0.05). SO, LO and PO treatments significantly up-regulated the gene expression of pparα and cpt1b compared with FO treatment (P < 0.05). Meanwhile, SO, LO and PO groups also enhanced the activity of muscle citrate synthase. Additionally, gene expression of pgc1-α, nrf1 and tfam was significantly up-regulated in the SO group compared with the FO group. The results of the muscle transcriptome indicated that compared with the FO group, the SO group could significantly increase the gene expression of prkag2 and the protein expression of p-AMPK/AMPK (P < 0.05). In conclusion, replacing fish oil with different vegetable oils could affect muscle sensory quality indices of juvenile large yellow croaker by changing intramuscular fat deposition, which might be due to the regulation on muscle mitochondrial biogenesis and fatty acid β-oxidation.

Short-Term Alternate Feeding between Terrestrially Sourced Oil- and Fish Oil-Based Diets Modulates the Intestinal Microecology of Juvenile Turbot.

A nine-week feeding trial was conducted to investigate changes in the intestinal microbiota of turbot in response to alternate feeding between terrestrially sourced oil (TSO)- and fish oil (FO)-based diets. The following three feeding strategies were designed: (1) continuous feeding with the FO-based diet (FO group); (2) weekly alternate feeding between soybean oil (SO)- and FO-based diets (SO/FO group); and (3) weekly alternate feeding between beef tallow (BT)- and FO-based diets (BT/FO group). An intestinal bacterial community analysis showed that alternate feeding reshaped the intestinal microbial composition. Higher species richness and diversity of the intestinal microbiota were observed in the alternate-feeding groups. A PCoA analysis showed that the samples clustered separately according to the feeding strategy, and among the three groups, the SO/FO group clustered relatively closer to the BT/FO group. The alternate feeding significantly decreased the abundance of Mycoplasma and selectively enriched specific microorganisms, including short-chain fatty acid (SCFA)-producing bacteria, digestive bacteria (Corynebacterium and Sphingomonas), and several potential pathogens (Desulfovibrio and Mycobacterium). Alternate feeding may maintain the intestinal microbiota balance by improving the connectivity of the ecological network and increasing the competitive interactions within the ecological network. The alternate feeding significantly upregulated the KEGG pathways of fatty acid and lipid metabolism, glycan biosynthesis, and amino acid metabolism in the intestinal microbiota. Meanwhile, the upregulation of the KEGG pathway of lipopolysaccharide biosynthesis indicates a potential risk for intestinal health. In conclusion, short-term alternate feeding between dietary lipid sources reshapes the intestinal microecology of the juvenile turbot, possibly resulting in both positive and negative effects.

Dietary n-3 PUFA augments pre-ovulatory follicle turnover and prolificacy in well-fed ewes

The present study evaluated the effect of dietary supplementation with n-3 polyunsaturated fatty acids (PUFA) on preovulatory follicle (POF) turnover, prolificacy, and endocrine and metabolic milieu in Malpura sheep. Fifty cyclic ewes with 3–3.5 body condition scores on a five-point scale were allocated equally to two groups (n = 25) following estrus synchronization and were supplemented with 0.6 mL/kg body weight of n-3 PUFA-rich fish oil (FO) or palm oil (PO) as control, for 60 d following an acclimatization period of 7 d. All ewes were mated with sexually active rams at the end of the supplementation period. On ultrasonographic ovarian scanning at the last fourth estrus, the mean number of POFs was 77.8% greater (P < 0.01) in FO ewes than in the PO ewes. The proportion of ewes with multiple ovulations two months after the beginning of supplementation was 56% in the FO group as compared to 8% in the PO group. The number of fetuses was 46% higher (P < 0.01) in the FO than in the PO ewes at d 45 of gestation. At lambing, the twinning percent in the FO ewes was three times greater than in the PO ewes (27.3 vs. 9.1%). Plasma cholesterol, estradiol, and insulin concentrations were lower (P < 0.01) in ewes fed with FO than those offered PO group at the end of the feeding period. It was concluded that the dietary supplementation of n-3 PUFA-rich FO in well-fed Malpura ewes improved the number of follicles and ovulation rate which led to an increased prolificacy, accompanied by a reduction of plasma cholesterols, estradiol, and insulin.

Tenebrio molitor L. larvae inclusion in quail diet as a fat source: effects on performance, meat quality, and fatty acid composition

This study was conducted to determine the effects ofTenebrio molitor larvae inclusion in diets instead of soybean and fish oil on Japanese quail’s performance, carcass, and meat quality. A total of 180 7-day-old quails (Coturnix coturnix japonica) of both sexes were housed in battery packs in a controlled environment room. Chicks were randomly allocated to three treatment groups, each with 5 replicate pens of 12 chicks. The dietary treatments were as follows: (1) control (C) group (soybean meal-based diet); (2) fish oil supplemented diet (FO, 30 g/kg DM fish oil); and (3)T. molitor larvae diet (TML, 100 g/kg DM), respectively. No differences were found between daily weight gain and daily feed intake (P&gt;0.05). The final body weight was higher in quail-fed TML and lower in quailfed FO (P&lt;0.01). The feed conversion ratio was improved with the TML diet in quail (P&lt;0.05). Carcass weight was higher in the TML group than in the FO group (P&lt;0.05). No differences between treatment groups were found in liver, heart, and spleen percentages (P&gt;0.05); however, the proventriculus percentage was higher in FO than in the TML group. The chemical characteristics of breast meat were unaffected by dietary treatments (P&gt;0.05). The fatty acids (FA) were similar primarily in quail breast meat fed C and TML diets; however, polyunsaturated FA (PUFA) was lower in the TML diet compared to the C diet (P&gt;0.05). In the FO groups C14:0, C20:4 n6 and n-3 fatty acids (C18:3, C20:3, C20:5, C22:6), saturated FA, PUFA, and n-3/n-6 were increased, monounsaturated FA, PUFA n-6, and n-6/n-3 were decreased compared to the C and TML groups (P&lt;0.01).

Comparison of the effects of 3 kinds of oils rich in omega-3 polyunsaturated fatty acids on glycolipid metabolism and lipoprotein subfractions

Dietary omega-3 polyunsaturated fatty acids (ω-3 PUFAs) can be classified into animal- and plant-derived ω-3 PUFAs. Patients with type 2 diabetes (T2DM) are frequently accompanied by dyslipidemia, which is closely related to the high-density lipoprotein (HDL-C) subfractions change. This study aimed to determine the effects of different sources ω-3 PUFAs on glucolipid metabolism and lipoprotein subfractions in T2DM with dyslipidemia. Ninety T2DM patients with dyslipidemia were randomly assigned to take 3 g/day fish oil (FO, containing eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA)), 3 g/day perilla oil (PO, containing α-linolenic acid (ALA)), or 3 g/day blend oil (BO, containing EPA, DHA and ALA) for 3 months. 90 patients completed the intervention. There was a significant reduction of glycated hemoglobin (HbA1c) in all the groups. The triglycerides (TG) in the FO group were significantly different with a group × time interaction (P = 0.043), which was higher compared with the other two groups. The serum small HDL-C subfractions in the PO group was higher and the serum large HDL-C subfractions in the PO group was lower than those in the BO and FO groups. Plant-derived ω-3 PUFAs are more effective at controlling blood glucose than animal-derived ω-3 PUFAs. However, animal-derived ω-3 PUFAs have a significant lowering effect on TG compared with plant-derived ω-3 PUFAs. Particularly, large HDL-C subfractions after animal-derived ω-3 PUFAs intake were higher than plant-derived ω-3 PUFAs intake; while small HDL-C subfractions were lower. Both the animal- and plant-derived ω-3 PUFAs have practical value in improving glucose and lipids metabolism in T2DM patients with dyslipidemia.

Equal bioavailability of omega-3 PUFA from Calanus oil, fish oil and krill oil: A 12-week randomized parallel study.

The bioavailability of long-chain omega-3 polyunsaturated fatty acids (n3 PUFA) can be affected by the form in which they are bound. An alternative source of n3 PUFA is Calanus finmarchicus oil (CO), which, unlike fish oil (FO) and krill oil (KO), contains fatty acids primarily bound as wax esters. Recent studies have shown that n3 PUFA from CO are bioavailable to humans, but CO has not been compared to other marine oils such as FO or KO. Therefore, the aim of this study was to investigate the influence of 12 weeks supplementation with CO, FO and KO on the long-term n3 PUFA status in healthy volunteers. The Omega-3 Index (O3I), defined as red blood cell EPA + DHA content as a percentage of total identified fatty acids, was used as a measure to assess n3 PUFA status. Sixty-two participants (mean ± standard deviation [SD] age: 29.7 ± 8.43 years) completed the randomized parallel group study (CO group: n=21, 4 capsules/day, EPA + DHA dose: 242 mg/day; FO group: n=22, 1 capsule/day, EPA + DHA dose: 248 mg/day; KO group: n=19, 2 capsules/day, EPA + DHA dose: 286 mg/day). At baseline, the three groups showed comparable (mean ± SD) O3I values (CO: 5.13 ± 1.12%, FO: 4.90 ± 0.57%, KO: 4.87 ± 0.77%). The post-interventional (mean ± SD) O3I increase was comparable between the three groups (CO: 1.09 ± 0.55%; FO: 1.0 ± 0.53%; KO: 1.15 ± 0.65%, all p < 0.001). The study confirms that CO can increase the n3 PUFA status comparable to FO and KO and is therefore an alternative marine source of bioavailable n3 PUFA, especially with regard to sustainability.

Analysis of fatty acid composition and sensitivity to dietary n-3 PUFA intervention of mouse n-3 PUFA-enriched tissues/organs

Purposen-3 polyunsaturated fatty acids (PUFAs), docosahexaenoic acid (DHA; C22:6 n3) and eicosapentaenoic acid (EPA; C20:5 n3), are of concern for their health-promoting effects such as anti-inflammatory, but the tissue selectivity for n-3 PUFA (i.e., which tissues and organs are rich in n-3 PUFA) is still not well known. In addition, it is unclear which tissues and organs are more sensitive to n-3 PUFA intervention. These unresolved issues have greatly hindered the exploring of the health benefits of n-3 PUFA. MethodsTwenty-four 7-week-old male C57BL/6 J mice were assigned to the control, fish oil, DHA, and EPA groups. The last three groups were given a 4-week oral intervention of fatty acids in ethyl ester (400 mg/kg bw). The fatty acid profiles in 27 compartments were determined by gas chromatography. ResultsThe proportion of long-chain n-3 PUFA (the total relative percentage of EPA, DPA n3, and DHA) was analyzed. Eight tissues and organs, including the brain (cerebral cortex, hippocampus, hypothalamus) and peripheral organs (tongue, quadriceps, gastrocnemius, kidney, and heart) were determined as being n-3 PUFA-enriched tissues and organs, owing to their high n-3 PUFA levels. The highest n-3 PUFA content was observed in the tongue for the first time. Notably, the content of linoleic acid (LA; C18:2 n6c) in peripheral organs was observed to be relatively high compared with that in the brain. Interestingly, the proportions of EPA in the kidney, heart, quadriceps, gastrocnemius, and tongue increased more markedly after the EPA intervention than after the DHA or fish oil intervention. As expected, the levels of proinflammatory arachidonic acid (AA; C20:4 n6) in the kidney, quadriceps, and tongue were markedly decreased after the three dietary interventions. ConclusionPeripheral tissues and organs, including the tongue, quadriceps, gastrocnemius, kidney, and heart, besides the brain, showed obvious tissue selectivity for n-3 PUFA. In the whole body of mice, the tongue exhibits the strongest preference for n-3 PUFA, with the highest proportion of n-3 PUFA. Moreover, these peripheral tissues and organs, especially the kidney, are more sensitive to dietary EPA administration in comparison with the brain.

Cranberry juice decreases oxidative stress and improves glucose metabolism in patients with rheumatoid arthritis supplemented with fish oil

BackgroundBeneficial effects of fish oil n-3 polyunsaturated fatty acids (PUFAs) have been reported in rheumatoid arthritis (RA), however, high doses of n-3 fatty acids have been associated with increased total and LDL cholesterol and impaired glucose metabolism. Cranberry products have been reported to improve markers of oxidative stress, inflammation, and the metabolic profile in patients with type 2 diabetes mellitus and with metabolic syndrome. We hypothesized that including low-energy cranberry juice on a regimen of fish oil supplementation could improve oxidative stress and attenuate the undesirable effects of fish oil in lipid and glucose metabolism in patients with RA. MethodsA 90-days randomized controlled trial was conducted. Patients (n = 70) were assigned to one of three groups: control (C); fish oil (FO) received 3 g of fish oil PUFAs supplementation/day; and fish oil and cranberry (FOCR) received 3 g of fish oil PUFAs and 500 mL of cranberry juice/day. ResultsThere was no difference in parameters between FO and the C. FOCR group showed decreased glucose (p = 0.0225), lipid (p = 0.0079), protein (p = 0.0063) oxidation, and Oxidative Stress Index (p = 0.0375) values compared to FO. FOCR reduced glucose values (p = 0.0104), triacylglycerol (p = 0.0065), protein oxidation (p = 0.0042) and Oxidative Stress Index (OSI) (p = 0.0053) compared to the C. Compared to baseline, FO group decreased triacylglycerol (p = 0.0374) and increased glucose (p 0.0001), whereas FOCR group decreased triacylglycerol (p = 0.0398) values. Conclusion500 mL/day of reduced-calorie cranberry juice in patients with RA using fish oil supplementation decreased lipid, protein oxidation and OSI.