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Wang M, Wu S, Ding H, Wang M, Ma J, Xiao J, Wang B, Bao Z, Hu J. Dietary antarctic krill improves antioxidant capacity, immunity and reduces lipid accumulation, insights from physiological and transcriptomic analysis of Plectropomus leopardus. BMC Genomics 2024; 25:210. [PMID: 38408914 PMCID: PMC10895837 DOI: 10.1186/s12864-024-10099-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Accepted: 02/08/2024] [Indexed: 02/28/2024] Open
Abstract
BACKGROUND Due to its enormous biomass, Antarctic krill (Euphausia superba) plays a crucial role in the Antarctic Ocean ecosystem. In recent years, Antarctic krill has found extensive application in aquaculture, emerging as a sustainable source of aquafeed with ideal nutritional profiles. However, a comprehensive study focused on the detailed effects of dietary Antarctic krill on aquaculture animals, especially farmed marine fishes, is yet to be demonstrated. RESULTS In this study, a comparative experiment was performed using juvenile P. leopardus, fed with diets supplemented with Antarctic krill (the krill group) or without Antarctic krill (the control group). Histological observation revealed that dietary Antarctic krill could reduce lipid accumulation in the liver while the intestine exhibited no obvious changes. Enzyme activity measurements demonstrated that dietary Antarctic krill had an inhibitory effect on oxidative stress in both the intestine and the liver. By comparative transcriptome analysis, a total of 1,597 and 1,161 differentially expressed genes (DEGs) were identified in the intestine and liver, respectively. Functional analysis of the DEGs showed multiple enriched terms significantly related to cholesterol metabolism, antioxidants, and immunity. Furthermore, the expression profiles of representative DEGs, such as dhcr7, apoa4, sc5d, and scarf1, were validated by qRT-PCR and fluorescence in situ hybridization. Finally, a comparative transcriptome analysis was performed to demonstrate the biased effects of dietary Antarctic krill and astaxanthin on the liver of P. leopardus. CONCLUSIONS Our study demonstrated that dietary Antarctic krill could reduce lipid accumulation in the liver of P. leopardus, enhance antioxidant capacities in both the intestine and liver, and exhibit molecular-level improvements in lipid metabolism, immunity, and antioxidants. It will contribute to understanding the protective effects of Antarctic krill in P. leopardus and provide insights into aquaculture nutritional strategies.
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Affiliation(s)
- Mengya Wang
- MOE Key Laboratory of Marine Genetics and Breeding, College of Marine Life Sciences/Key Laboratory of Tropical Aquatic Germplasm of Hainan Province, Sanya Oceanographic Institution, Ocean University of China, Qingdao, Sanya, China
| | - Shaoxuan Wu
- MOE Key Laboratory of Marine Genetics and Breeding, College of Marine Life Sciences/Key Laboratory of Tropical Aquatic Germplasm of Hainan Province, Sanya Oceanographic Institution, Ocean University of China, Qingdao, Sanya, China
| | - Hui Ding
- MOE Key Laboratory of Marine Genetics and Breeding, College of Marine Life Sciences/Key Laboratory of Tropical Aquatic Germplasm of Hainan Province, Sanya Oceanographic Institution, Ocean University of China, Qingdao, Sanya, China
| | - Mingyi Wang
- MOE Key Laboratory of Marine Genetics and Breeding, College of Marine Life Sciences/Key Laboratory of Tropical Aquatic Germplasm of Hainan Province, Sanya Oceanographic Institution, Ocean University of China, Qingdao, Sanya, China
| | - Jiayi Ma
- MOE Key Laboratory of Marine Genetics and Breeding, College of Marine Life Sciences/Key Laboratory of Tropical Aquatic Germplasm of Hainan Province, Sanya Oceanographic Institution, Ocean University of China, Qingdao, Sanya, China
| | - Jie Xiao
- MOE Key Laboratory of Marine Genetics and Breeding, College of Marine Life Sciences/Key Laboratory of Tropical Aquatic Germplasm of Hainan Province, Sanya Oceanographic Institution, Ocean University of China, Qingdao, Sanya, China
| | - Bo Wang
- MOE Key Laboratory of Marine Genetics and Breeding, College of Marine Life Sciences/Key Laboratory of Tropical Aquatic Germplasm of Hainan Province, Sanya Oceanographic Institution, Ocean University of China, Qingdao, Sanya, China.
- Hainan Yazhou Bay Seed Laboratory, 572025, Sanya, China.
| | - Zhenmin Bao
- MOE Key Laboratory of Marine Genetics and Breeding, College of Marine Life Sciences/Key Laboratory of Tropical Aquatic Germplasm of Hainan Province, Sanya Oceanographic Institution, Ocean University of China, Qingdao, Sanya, China
- Hainan Yazhou Bay Seed Laboratory, 572025, Sanya, China
| | - Jingjie Hu
- MOE Key Laboratory of Marine Genetics and Breeding, College of Marine Life Sciences/Key Laboratory of Tropical Aquatic Germplasm of Hainan Province, Sanya Oceanographic Institution, Ocean University of China, Qingdao, Sanya, China
- Hainan Yazhou Bay Seed Laboratory, 572025, Sanya, China
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Huang H, Liao D, He B, Zhou G, Cui Y. Clinical effectiveness of krill oil supplementation on cardiovascular health in humans: An updated systematic review and meta-analysis of randomized controlled trials. Diabetes Metab Syndr 2023; 17:102909. [PMID: 38039646 DOI: 10.1016/j.dsx.2023.102909] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Revised: 10/23/2023] [Accepted: 11/14/2023] [Indexed: 12/03/2023]
Abstract
BACKGROUND The potential role of krill oil (KO) supplementation on cardiovascular health are inconsistent in several clinical trials. Therefore, our present meta-analysis aimed to systematically evaluate the impacts of supplementation of KO on cardiovascular disease risk factors (CVDRFs). METHODS Intervention trials assessing KO supplementation on cardiovascular disease (CVD) outcomes were systematically retrieved for pooling. The primary outcome was lipid profile. Secondary outcomes were consisted by blood pressure, glycemic indices, body composition together with inflammatory markers. We synthesized the effect sizes with 95% confidence intervals and weighted mean difference. To explore the heterogeneity source, we employed meta-regression and subgroup analysis. Quality assessment, publication bias, sensitivity-analysis and the certainty of evidence were also carried out. RESULTS We included 14 trials (18 treatment arms) with 1458 participants. KO supplementation had beneficial effects on total cholesterol (P = 0.01), low-density lipoprotein cholesterol (P = 0.006), and triglycerides (P = 0.0005). However, no effects were found for other CVDRFs, such as blood pressure, glycemic control, body composition as well as inflammatory markers. Subgroup analyses indicated that these notably favorable effects were observed in trials with a parallel design, treatment duration <8 weeks and subjects with baseline body mass index <28 kg/m2. The above findings remained consistent in the sensitivity analysis, without obvious publication bias detected. CONCLUSIONS The current evidence demonstrated that daily KO supplementation may as a candidate for lipid management strategies. In future, studies should pay attention to the relationships of KO intake with the incidence of CVD events or all-cause mortality.
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Affiliation(s)
- Haohai Huang
- Department of Clinical Pharmacy, Dongguan Songshan Lake Central Hospital, Dongguan Third People's Hospital, Affiliated Dongguan Shilong People's Hospital of Southern Medical University, Dongguan, Guangdong, China; Medical and Pharmacy Research Laboratory, Dongguan Songshan Lake Central Hospital, Dongguan Third People's Hospital, Affiliated Dongguan Shilong People's Hospital of Southern Medical University, Dongguan, Guangdong, China.
| | - Dan Liao
- Department of Gynaecology, Dongguan Songshan Lake Central Hospital, Dongguan Third People's Hospital, Affiliated Dongguan Shilong People's Hospital of Southern Medical University, Dongguan, Guangdong, China
| | - Bin He
- Medical and Pharmacy Research Laboratory, Dongguan Songshan Lake Central Hospital, Dongguan Third People's Hospital, Affiliated Dongguan Shilong People's Hospital of Southern Medical University, Dongguan, Guangdong, China
| | - Guanghui Zhou
- Department of Rehabilitation Medicine, Dongguan Songshan Lake Central Hospital, Dongguan Third People's Hospital, Affiliated Dongguan Shilong People's Hospital of Southern Medical University, Dongguan, Guangdong, China
| | - Yejia Cui
- Department of Clinical Laboratory, Dongguan Songshan Lake Central Hospital, Dongguan Third People's Hospital, Affiliated Dongguan Shilong People's Hospital of Southern Medical University, Dongguan, Guangdong, China
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Hwang SM, Kim YU, Kim JK, Chun YS, Kwon YS, Ku SK, Song CH. Preventive and Therapeutic Effects of Krill Oil on Obesity and Obesity-Induced Metabolic Syndromes in High-Fat Diet-Fed Mice. Mar Drugs 2022; 20:md20080483. [PMID: 36005486 PMCID: PMC9410137 DOI: 10.3390/md20080483] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Revised: 07/18/2022] [Accepted: 07/25/2022] [Indexed: 11/16/2022] Open
Abstract
Obesity increases the risks of metabolic syndromes including nonalcoholic fatty liver disease (NAFLD), diabetic dyslipidemia, and chronic kidney disease. Dietary krill oil (KO) has shown antioxidant and anti-inflammatory properties, thereby being a therapeutic potential for obesity-induced metabolic syndromes. Thus, the effects of KO on lipid metabolic alteration were examined in a high-fat diet (HFD)-fed mice model. The HFD model (n = 10 per group) received an oral gavage with distilled water as a control, metformin at 250 mg/kg, and KO at 400, 200, and 100 mg/kg for 12 weeks. The HFD-induced weight gain and fat deposition were significantly reduced in the KO treatments compared with the control. Blood levels were lower in parameters for NAFLD (e.g., alanine aminotransferase, and triglyceride), type 2 diabetes (e.g., glucose and insulin), and renal dysfunction (e.g., blood urea nitrogen and creatinine) by the KO treatments. The KO inhibited lipid synthesis through the modification of gene expressions in the liver and adipose tissues and adipokine-mediated pathways. Furthermore, KO showed hepatic antioxidant activities and glucose lowering effects. Histopathological analyses revealed that the KO ameliorated the hepatic steatosis, pancreatic endocrine/exocrine alteration, adipose tissue hypertrophy, and renal steatosis. These analyses suggest that KO may be promising for inhibiting obesity and metabolic syndromes.
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Affiliation(s)
- Seung-Min Hwang
- Department of Veterinary Surgery, College of Veterinary Medicine, Kyungpook National University, Daegu 41566, Korea; (S.-M.H.); (Y.-S.K.)
| | - Yeong Uk Kim
- Department of Urology, College of Medicine, Yeungnam University, Daegu 42415, Korea;
| | - Jong-Kyu Kim
- AriBnC Co., Ltd., Yongin 16914, Korea; (J.-K.K.); (Y.-S.C.)
| | - Yoon-Seok Chun
- AriBnC Co., Ltd., Yongin 16914, Korea; (J.-K.K.); (Y.-S.C.)
| | - Young-Sam Kwon
- Department of Veterinary Surgery, College of Veterinary Medicine, Kyungpook National University, Daegu 41566, Korea; (S.-M.H.); (Y.-S.K.)
| | - Sae-Kwang Ku
- Department of Anatomy and Histology, College of Korean Medicine, Daegu Haany University, Gyeongsan 38610, Korea
- Correspondence: (S.-K.K.); (C.-H.S.); Tel.: +82-53-819-1549 (S.-K.K.); +82-53-819-1822 (C.-H.S.)
| | - Chang-Hyun Song
- Department of Anatomy and Histology, College of Korean Medicine, Daegu Haany University, Gyeongsan 38610, Korea
- Correspondence: (S.-K.K.); (C.-H.S.); Tel.: +82-53-819-1549 (S.-K.K.); +82-53-819-1822 (C.-H.S.)
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Fish Oil Enriched n-3 Polyunsaturated Fatty Acids Improve Ketogenic Low-Carbohydrate/High-Fat Diet-Caused Dyslipidemia, Excessive Fat Accumulation, and Weight Control in Rats. Nutrients 2022; 14:nu14091796. [PMID: 35565762 PMCID: PMC9101890 DOI: 10.3390/nu14091796] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Revised: 04/20/2022] [Accepted: 04/25/2022] [Indexed: 02/04/2023] Open
Abstract
Low-carbohydrate and high-fat diets have been used for body weight (BW) control, but their adverse effects on lipid profiles have raised concern. Fish oil (FO), rich in omega-3 polyunsaturated fatty acids, has profound effects on lipid metabolism. We hypothesized that FO supplementation might improve the lipid metabolic disturbance elicited by low-carbohydrate and high-fat diets. Male SD rats were randomized into normal control diet (NC), high-fat diet (HF), and low-carbohydrate/high-fat diet (LC) groups in experiment 1, and NC, LC, LC + 5% FO (5CF), and LC + 10% FO diet (10CF) groups in experiment 2. The experimental duration was 11 weeks. In the LC group, a ketotic state was induced, and food intake was decreased; however, it did not result in BW loss compared to either the HF or NC groups. In the 5CF group, rats lost significant BW. Dyslipidemia, perirenal and epididymal fat accumulation, hepatic steatosis, and increases in triglyceride and plasma leptin levels were observed in the LC group but were attenuated by FO supplementation. These findings suggest that a ketogenic low-carbohydrate/high-fat diet with no favorable effect on body weight causes visceral and liver lipid accumulation. FO supplementation not only aids in body weight control but also improves lipid metabolism in low-carbohydrate/high-fat diet-fed rats.
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Mitrovic M, Sistilli G, Horakova O, Rossmeisl M. Omega-3 phospholipids and obesity-associated NAFLD: Potential mechanisms and therapeutic perspectives. Eur J Clin Invest 2022; 52:e13650. [PMID: 34291454 DOI: 10.1111/eci.13650] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Revised: 07/09/2021] [Accepted: 07/19/2021] [Indexed: 02/06/2023]
Abstract
Prevalence of non-alcoholic fatty liver disease (NAFLD) increases in line with obesity and type 2 diabetes, and there is no approved drug therapy. Polyunsaturated fatty acids of n-3 series (omega-3) are known for their hypolipidaemic and anti-inflammatory effects. Existing clinical trials suggest varying effectiveness of triacylglycerol- or ethyl ester-bound omega-3 in the treatment of NAFLD, without affecting advanced stages such as non-alcoholic steatohepatitis. Preclinical studies suggest that the lipid class used to supplement omega-3 may determine the extent and nature of their effects on metabolism. Phospholipids of marine origin represent an alternative source of omega-3. The aim of this review is to summarise the available evidence on the use of omega-3 phospholipids, primarily in obesity-related NAFLD, and to outline perspectives of their use in the prevention/treatment of NAFLD. A PubMed literature search was conducted in May 2021. In total, 1088 articles were identified, but based on selection criteria, 38 original papers were included in the review. Selected articles describing the potential mechanisms of action of omega-3 phospholipids have also been included. Preclinical evidence clearly indicates that omega-3 phospholipids have strong antisteatotic effects in the liver, which are stronger compared to omega-3 administered as triacylglycerols. Multiple mechanisms are likely involved in the overall antisteatotic effects, involving not only the liver but also adipose tissue and the gut. Robust preclinical evidence for strong antisteatotic effects of omega-3 phospholipids in the liver should be confirmed in clinical trials. Further research is needed on the possible effects of omega-3 phospholipids on advanced NAFLD.
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Affiliation(s)
- Marko Mitrovic
- Laboratory of Adipose Tissue Biology, Institute of Physiology of the Czech Academy of Sciences, Prague, Czech Republic
| | - Gabriella Sistilli
- Laboratory of Adipose Tissue Biology, Institute of Physiology of the Czech Academy of Sciences, Prague, Czech Republic
| | - Olga Horakova
- Laboratory of Adipose Tissue Biology, Institute of Physiology of the Czech Academy of Sciences, Prague, Czech Republic
| | - Martin Rossmeisl
- Laboratory of Adipose Tissue Biology, Institute of Physiology of the Czech Academy of Sciences, Prague, Czech Republic
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Aydin Cil M, Ghosi Ghareaghaji A, Bayir Y, Buyuktuncer Z, Besler HT. Efficacy of krill oil versus fish oil on obesity-related parameters and lipid gene expression in rats: randomized controlled study. PeerJ 2021; 9:e12009. [PMID: 34692241 PMCID: PMC8483003 DOI: 10.7717/peerj.12009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Accepted: 07/28/2021] [Indexed: 11/23/2022] Open
Abstract
Backround This study aimed to determine the effects of LC n-3 PUFA supplementation on the prevention and treatment of obesity and obesity-related diseases, and to compare the efficiency of different LC n-3 PUFA sources via biochemical and genetic mechanisms in rats. Methods Male Wistar rats were randomized into four study groups, and fed with a standard diet, High Fat Diet (HFD), HFD+%2.5 Fish Oil (FO-HFD) or HFD+%2.5 Krill Oil (KO-HFD) for eight weeks. Food consumption, weight gain, serum glucose, insulin, ghrelin and leptin concentrations, lipid profile, liver fatty acid composition, and FADS1 and FADS2 mRNA gene expression levels were measured. Results Weight gain in each HFD group was significantly higher than control group (p < 0.001), without any differences among them (p < 0.05). LC n-3 PUFAs modified lipid profile, but not glucose tolerance. Serum leptin levels were significantly higher in HFD groups than in the control group, however, no difference in serum ghrelin levels was observed among the groups. Liver n-3 fatty acid desaturation activity was higher (p = 0.74), and liver total lipid content was lower (p = 0.86) in KO-HFD compared to FO-HFD. FADS1 gene expression was highest in the HFD group (p < 0.001) while FADS2 gene expression was highest in the FO-HFD group (p < 0.001). Conclusion LC n-3 PUFAs, especially krill oil, had moderate effects on lipid profile, but limited effects on obesity related parameters, suggesting different effects of different sources on gene expression levels. Further randomized controlled trials are needed to determine the efficacy of different LC n-3 PUFA sources in the prevention and treatment of obesity in humans.
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Affiliation(s)
- Mevra Aydin Cil
- Department of Nutrition and Dietetics, Faculty of Health Sciences, Hacettepe University, Ankara, Turkey.,Department of Nutrition and Dietetics, Faculty of Health Sciences, Atatürk University, Erzurum, Turkey
| | - Atena Ghosi Ghareaghaji
- Department of Molecular Biology and Genetics, Faculty of Science, Atatürk University, Erzurum, Turkey
| | - Yasin Bayir
- Department of Biochemistry, Faculty of Pharmacy, Atatürk University, Erzurum, Turkey
| | - Zehra Buyuktuncer
- Department of Nutrition and Dietetics, Faculty of Health Sciences, Hacettepe University, Ankara, Turkey
| | - Halit Tanju Besler
- Department of Nutrition and Dietetics, Faculty of Health Sciences, Hacettepe University, Ankara, Turkey.,Department of Nutrition and Dietetics, Faculty of Health Sciences, Istinye University, Istanbul, Turkey
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Krill Oil Treatment Increases Distinct PUFAs and Oxylipins in Adipose Tissue and Liver and Attenuates Obesity-Associated Inflammation via Direct and Indirect Mechanisms. Nutrients 2021; 13:nu13082836. [PMID: 34444996 PMCID: PMC8401900 DOI: 10.3390/nu13082836] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 08/12/2021] [Accepted: 08/16/2021] [Indexed: 12/31/2022] Open
Abstract
The development of obesity is characterized by the metabolic overload of tissues and subsequent organ inflammation. The health effects of krill oil (KrO) on obesity-associated inflammation remain largely elusive, because long-term treatments with KrO have not been performed to date. Therefore, we examined the putative health effects of 28 weeks of 3% (w/w) KrO supplementation to an obesogenic diet (HFD) with fat derived mostly from lard. The HFD with KrO was compared to an HFD control group to evaluate the effects on fatty acid composition and associated inflammation in epididymal white adipose tissue (eWAT) and the liver during obesity development. KrO treatment increased the concentrations of EPA and DHA and associated oxylipins, including 18-HEPE, RvE2 and 14-HDHA in eWAT and the liver. Simultaneously, KrO decreased arachidonic acid concentrations and arachidonic-acid-derived oxylipins (e.g., HETEs, PGD2, PGE2, PGF2α, TXB2). In eWAT, KrO activated regulators of adipogenesis (e.g., PPARγ, CEBPα, KLF15, STAT5A), induced a shift towards smaller adipocytes and increased the total adipocyte numbers indicative for hyperplasia. KrO reduced crown-like structures in eWAT, and suppressed HFD-stimulated inflammatory pathways including TNFα and CCL2/MCP-1 signaling. The observed eWAT changes were accompanied by reduced plasma leptin and increased plasma adiponectin levels over time, and improved insulin resistance (HOMA-IR). In the liver, KrO suppressed inflammatory signaling pathways, including those controlled by IL-1β and M-CSF, without affecting liver histology. Furthermore, KrO deactivated hepatic REL-A/p65-NF-κB signaling, consistent with increased PPARα protein expression and a trend towards an increase in IkBα. In conclusion, long-term KrO treatment increased several anti-inflammatory PUFAs and oxylipins in WAT and the liver. These changes were accompanied by beneficial effects on general metabolism and inflammatory tone at the tissue level. The stimulation of adipogenesis by KrO allows for safe fat storage and may, together with more direct PPAR-mediated anti-inflammatory mechanisms, attenuate inflammation.
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Lang M, Song Y, Li Y, Xiang X, Ni L, Miao J. Purification, identification, and molecular mechanism of DPP-IV inhibitory peptides from defatted Antarctic krill powder. J Food Biochem 2021; 45:e13872. [PMID: 34296449 DOI: 10.1111/jfbc.13872] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Revised: 06/22/2021] [Accepted: 06/28/2021] [Indexed: 11/27/2022]
Abstract
Dipeptidyl peptidase-IV (DPP-IV) inhibitors can reduce the blood sugar levels of diabetic patients by preventing the rapid decomposition of incretin hormone and prolonging its physiological effects. In this study, DPP-IV inhibitory peptides FAGDDAPR and LAPPRGSL were isolated from defatted Antarctic krill powder (DAKP) protein by the sequential purification of ultrafiltration, gel filtration chromatography, and RP-HPLC, and IC50 values of the two peptides were 349.70 ± 3.66 μM and 461.14 ± 0.87 μM, respectively. The FAGDDAPR and LAPPRGSL were identified by LC-MS/MS method, and the molecular models of DPP-IV and the two peptides were further constructed by AutoDock Vina software, the results revealed that the inhibition activity of FAGDDAPR and LAPPRGSL was mainly attributed to the formation of strong hydrophobic interactions and hydrogen bonds with amino acids of DPP-IV. PRACTICAL APPLICATIONS: DAKP is an economical by-product produced in the production of krill oil and contains high-quality protein, but these products were mainly used as fish feed and had low utility value in the past. DPP-IV inhibitors are an efficacious drug employed in the treatment of hyperglycemia processes. However, these drugs can cause undesirable side effects. Thus, the development of new natural hypoglycemic drugs with low side effects is a valuable strategy to be applied in therapeutic interventions.
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Affiliation(s)
- Meng Lang
- College of Food Science and Technology, Shanghai Ocean University, Shanghai, P. R. China
| | - Yishan Song
- College of Food Science and Technology, Shanghai Ocean University, Shanghai, P. R. China
| | - Yan Li
- College of Food Science and Technology, Shanghai Ocean University, Shanghai, P. R. China
| | - Xi Xiang
- College of Food Science and Technology, Shanghai Ocean University, Shanghai, P. R. China
| | - Ling Ni
- College of Food Science and Technology, Shanghai Ocean University, Shanghai, P. R. China
| | - Junjian Miao
- College of Food Science and Technology, Shanghai Ocean University, Shanghai, P. R. China
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Omega-3 fatty acids ameliorate vascular inflammation: A rationale for their atheroprotective effects. Atherosclerosis 2021; 324:27-37. [PMID: 33812168 DOI: 10.1016/j.atherosclerosis.2021.03.003] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/18/2020] [Revised: 02/17/2021] [Accepted: 03/04/2021] [Indexed: 11/24/2022]
Abstract
BACKGROUND AND AIMS Clinical trials have demonstrated reductions in major adverse cardiovascular events with purified high-dose eicosapentaenoic acid (EPA), independent of effects on lipids. We aimed to investigate whether omega-3 fatty acids reduce vascular inflammation, a critical mediator of atherosclerosis, and hypothesised that EPA is superior to docosahexaenoic acid (DHA). METHODS In a double-blind randomised controlled trial and cell-culture study, 40 healthy volunteers were supplemented with 4 g daily of either EPA, DHA, fish oil (2:1 EPA:DHA), or placebo for 30 days. Serum was incubated with TNF-stimulated human umbilical vein endothelial cells (HUVECs), and markers of acute vascular inflammation (AVI) were measured. The effects of EPA, DHA (600 mg/kg/day), olive oil, or no treatment were also measured in preclinical models of [1] AVI using a periarterial collar (C57Bl/6J; n = 40 mice) and [2] atherosclerosis where ApoE-/- mice (n = 40) were fed a 16-week atherogenic diet. RESULTS EPA supplementation reduced expression of C-C motif chemokine ligand 2 (CCL2) by 25% compared to placebo (p = 0.03). In the AVI model, EPA reduced vascular expression of VCAM1 by 43% (p = 0.02) and CCL2 by 41% (p = 0.03). Significant inverse correlations were observed between EPA levels and vascular expression of VCAM1 (r = -0.56, p = 0.001) and CCL2 (r = -0.56, p = 0.001). In ApoE-/- mice, EPA reduced aortic expression of Il1b by 44% (p = 0.04) and Tnf by 49% (p = 0.04), with similar inverse correlations between EPA levels and both Il1b (r = -0.63, p = 0.009) and Tnf (r = -0.50, p = 0.04). CONCLUSIONS Supplementation with EPA, more so than DHA, ameliorates acute and chronic vascular inflammation, providing a rationale for the cardiovascular benefit observed with high dose omega-3 fatty acid administration.
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El-Gendy ZA, El-Batran SA, Youssef S, Ramadan A, Hotaby WE, Bakeer RM, Ahmed RF. Hepatoprotective effect of Omega-3 PUFAs against acute paracetamol-induced hepatic injury confirmed by FTIR. Hum Exp Toxicol 2021; 40:526-537. [PMID: 32909844 DOI: 10.1177/0960327120954522] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Acute paracetamol over dose-induced hepatotoxicity is considered an important medical hazard especially among women. Omega-3 long-chain polyunsaturated fatty acids (Omega-3 PUFAs) daily doses are nowadays recommended for their antioxidant and anti-inflammatory potentials. Fourier transform infrared (FTIR) spectroscopy is considered a reliable method in analyzing cellular alterations and is now efficiently used to diagnose several diseases and the efficacy of drugs even in the early stages. The aim of our study was to evaluate the hepatoprotective effect of Omega-3 PUFAs against paracetamol-induced hepatotoxicity in rats confirmed through measuring protein alterations in hepatocytes by FTIR. Rats were pretreated with Omega-3 PUFAs (50 and 100 mg/kg) for 21 days prior to oral ingestion of paracetamol. FTIR results revealed that Omega-3 PUFAs (50 mg/kg) limited the toxic effects of paracetamol by restoring the hepatic amide I to amide II ratio. In addition; biochemical analyses demonstrated that serum ALT, AST, Cholesterol, LDL-cholesterol and Il-6 levels as well as hepatic TNF-α, MDA, NOx levels were decreased. Besides; serum HDL-cholesterol level and hepatic GSH level were increased. Histopathological examinations of hepatic sections validated the hepatoprotective potential. The overall effect of this dose was comparable to those of the usual recommended hepatoprotective supplement; silymarin. In conclusion; it would be recommended to use Omega-3 PUFAs in low doses on daily bases as a hepatoprotective agent.
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Affiliation(s)
- Zeinab A El-Gendy
- Department of Pharmacology, Medical Research Division, 68787National Research Centre, Dokki, Giza, Egypt
| | - Seham A El-Batran
- Department of Pharmacology, Medical Research Division, 68787National Research Centre, Dokki, Giza, Egypt
| | - Sah Youssef
- Department of Pharmacology, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt
| | - A Ramadan
- Department of Pharmacology, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt
| | - Walid El Hotaby
- Department of Spectroscopy, Physics Division, 68787National Research Centre, Dokki, Giza, Egypt
| | - Rofanda M Bakeer
- Department of Pathology, Faculty of Medicine, Helwan University, Helwan, Egypt
- Department of Pathology, 110123October University of Modern Sciences and Arts (MSA) University, Egypt
| | - Rania F Ahmed
- Department of Pharmacology, Medical Research Division, 68787National Research Centre, Dokki, Giza, Egypt
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Real-time detection of authenticity and adulteration of krill phospholipids with soybean phospholipids using rapid evaporative ionization mass spectrometry: Application on commercial samples. Food Control 2021. [DOI: 10.1016/j.foodcont.2020.107680] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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12
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Sistilli G, Kalendova V, Cajka T, Irodenko I, Bardova K, Oseeva M, Zacek P, Kroupova P, Horakova O, Lackner K, Gastaldelli A, Kuda O, Kopecky J, Rossmeisl M. Krill Oil Supplementation Reduces Exacerbated Hepatic Steatosis Induced by Thermoneutral Housing in Mice with Diet-Induced Obesity. Nutrients 2021; 13:437. [PMID: 33572810 PMCID: PMC7912192 DOI: 10.3390/nu13020437] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Revised: 01/19/2021] [Accepted: 01/26/2021] [Indexed: 02/07/2023] Open
Abstract
Preclinical evidence suggests that n-3 fatty acids EPA and DHA (Omega-3) supplemented as phospholipids (PLs) may be more effective than triacylglycerols (TAGs) in reducing hepatic steatosis. To further test the ability of Omega-3 PLs to alleviate liver steatosis, we used a model of exacerbated non-alcoholic fatty liver disease based on high-fat feeding at thermoneutral temperature. Male C57BL/6N mice were fed for 24 weeks a lard-based diet given either alone (LHF) or supplemented with Omega-3 (30 mg/g diet) as PLs (krill oil; ω3PL) or TAGs (Epax 3000TG concentrate; ω3TG), which had a similar total content of EPA and DHA and their ratio. Substantial levels of TAG accumulation (~250 mg/g) but relatively low inflammation/fibrosis levels were achieved in the livers of control LHF mice. Liver steatosis was reduced by >40% in the ω3PL but not ω3TG group, and plasma ALT levels were markedly reduced (by 68%) in ω3PL mice as well. Krill oil administration also improved hepatic insulin sensitivity, and its effects were associated with high plasma adiponectin levels (150% of LHF mice) along with superior bioavailability of EPA, increased content of alkaloids stachydrine and trigonelline, suppression of lipogenic gene expression, and decreased diacylglycerol levels in the liver. This study reveals that in addition to Omega-3 PLs, other constituents of krill oil, such as alkaloids, may contribute to its strong antisteatotic effects in the liver.
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Affiliation(s)
- Gabriella Sistilli
- Institute of Physiology of the Czech Academy of Sciences, Videnska 1083, 14220 Prague 4, Czech Republic; (G.S.); (V.K.); (T.C.); (I.I.); (K.B.); (M.O.); (P.K.); (O.H.); (O.K.); (J.K.)
- Department of Physiology, Faculty of Science, Charles University, Vinicna 7, 12844 Prague 2, Czech Republic
| | - Veronika Kalendova
- Institute of Physiology of the Czech Academy of Sciences, Videnska 1083, 14220 Prague 4, Czech Republic; (G.S.); (V.K.); (T.C.); (I.I.); (K.B.); (M.O.); (P.K.); (O.H.); (O.K.); (J.K.)
- Department of Physiology, Faculty of Science, Charles University, Vinicna 7, 12844 Prague 2, Czech Republic
| | - Tomas Cajka
- Institute of Physiology of the Czech Academy of Sciences, Videnska 1083, 14220 Prague 4, Czech Republic; (G.S.); (V.K.); (T.C.); (I.I.); (K.B.); (M.O.); (P.K.); (O.H.); (O.K.); (J.K.)
| | - Illaria Irodenko
- Institute of Physiology of the Czech Academy of Sciences, Videnska 1083, 14220 Prague 4, Czech Republic; (G.S.); (V.K.); (T.C.); (I.I.); (K.B.); (M.O.); (P.K.); (O.H.); (O.K.); (J.K.)
- Department of Physiology, Faculty of Science, Charles University, Vinicna 7, 12844 Prague 2, Czech Republic
| | - Kristina Bardova
- Institute of Physiology of the Czech Academy of Sciences, Videnska 1083, 14220 Prague 4, Czech Republic; (G.S.); (V.K.); (T.C.); (I.I.); (K.B.); (M.O.); (P.K.); (O.H.); (O.K.); (J.K.)
| | - Marina Oseeva
- Institute of Physiology of the Czech Academy of Sciences, Videnska 1083, 14220 Prague 4, Czech Republic; (G.S.); (V.K.); (T.C.); (I.I.); (K.B.); (M.O.); (P.K.); (O.H.); (O.K.); (J.K.)
- Department of Physiology, Faculty of Science, Charles University, Vinicna 7, 12844 Prague 2, Czech Republic
| | - Petr Zacek
- Proteomics Core Facility, Faculty of Science, Charles University, Division BIOCEV, Prumyslova 595, 25250 Vestec, Czech Republic;
| | - Petra Kroupova
- Institute of Physiology of the Czech Academy of Sciences, Videnska 1083, 14220 Prague 4, Czech Republic; (G.S.); (V.K.); (T.C.); (I.I.); (K.B.); (M.O.); (P.K.); (O.H.); (O.K.); (J.K.)
| | - Olga Horakova
- Institute of Physiology of the Czech Academy of Sciences, Videnska 1083, 14220 Prague 4, Czech Republic; (G.S.); (V.K.); (T.C.); (I.I.); (K.B.); (M.O.); (P.K.); (O.H.); (O.K.); (J.K.)
| | - Karoline Lackner
- Institute of Pathology, Medical University of Graz, Neue Stiftingtalstraße 6, 8010 Graz, Austria;
| | - Amalia Gastaldelli
- Cardiometabolic Risk Unit, Institute of Clinical Physiology, National Research Council, Via Moruzzi 1, 56100 Pisa, Italy;
| | - Ondrej Kuda
- Institute of Physiology of the Czech Academy of Sciences, Videnska 1083, 14220 Prague 4, Czech Republic; (G.S.); (V.K.); (T.C.); (I.I.); (K.B.); (M.O.); (P.K.); (O.H.); (O.K.); (J.K.)
| | - Jan Kopecky
- Institute of Physiology of the Czech Academy of Sciences, Videnska 1083, 14220 Prague 4, Czech Republic; (G.S.); (V.K.); (T.C.); (I.I.); (K.B.); (M.O.); (P.K.); (O.H.); (O.K.); (J.K.)
| | - Martin Rossmeisl
- Institute of Physiology of the Czech Academy of Sciences, Videnska 1083, 14220 Prague 4, Czech Republic; (G.S.); (V.K.); (T.C.); (I.I.); (K.B.); (M.O.); (P.K.); (O.H.); (O.K.); (J.K.)
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Zhang J, Freund MA, Culler MD, Yang R, Chen PB, Park Y, Decker EA, Zhang G. How To Stabilize ω-3 Polyunsaturated Fatty Acids (PUFAs) in an Animal Feeding Study?-Effects of the Temperature, Oxygen Level, and Antioxidant on Oxidative Stability of ω-3 PUFAs in a Mouse Diet. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:13146-13153. [PMID: 32159344 DOI: 10.1021/acs.jafc.9b08298] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Substantial studies have shown that ω-3 polyunsaturated fatty acids (PUFAs) have various health-promoting effects; however, there are inconsistent results from animal studies that showed that ω-3 PUFAs have no effects or even detrimental effects. Emerging research suggests that oxidized ω-3 PUFAs have different effects compared to unoxidized ω-3 PUFAs; therefore, lipid oxidation of dietary ω-3 PUFAs could contribute to the mixed results of ω-3 PUFAs in animal studies. Here, we prepared an AIN-93G-based, semi-purified, powder diet, which is one of the most commonly used rodent diets in animal studies, to study the oxidative stability of fortified ω-3 PUFAs in animal feed. We found that lowering the storage temperature or the addition of a certain antioxidant, notably tert-butylhydroquinone (TBHQ), helps to stabilize ω-3 PUFAs and suppress ω-3 oxidation in the animal diet, while reducing the level of oxygen in the storage atmosphere is not very effective. The addition of 50 ppm of TBHQ in the diet inhibited 99.5 ± 0.1% formation of primary oxidation products and inhibited 96.1 ± 0.7% formation of secondary oxidation products, after 10 days of storage of the prepared diet at a typical animal-feeding experiment condition. Overall, our results highlight that ω-3 PUFAs are highly prone to lipid oxidation in a typical animal-feeding experiment, emphasizing the critical importance to stabilize ω-3 PUFAs in animal studies.
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Affiliation(s)
- Jianan Zhang
- Department of Food Science, University of Massachusetts Amherst, Amherst, Massachusetts 01003, United States
| | - Michael A Freund
- Department of Food Science, University of Massachusetts Amherst, Amherst, Massachusetts 01003, United States
| | - Mitchell D Culler
- Department of Food Science, University of Massachusetts Amherst, Amherst, Massachusetts 01003, United States
| | - Ran Yang
- Department of Food Science, University of Massachusetts Amherst, Amherst, Massachusetts 01003, United States
| | - Phoebe B Chen
- Department of Food Science, University of Massachusetts Amherst, Amherst, Massachusetts 01003, United States
| | - Yeonhwa Park
- Department of Food Science, University of Massachusetts Amherst, Amherst, Massachusetts 01003, United States
| | - Eric A Decker
- Department of Food Science, University of Massachusetts Amherst, Amherst, Massachusetts 01003, United States
| | - Guodong Zhang
- Department of Food Science, University of Massachusetts Amherst, Amherst, Massachusetts 01003, United States
- Molecular and Cellular Biology Graduate Program, University of Massachusetts Amherst, Amherst, Massachusetts 01003, United States
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Lin Y, Yin W, Liu G. Development and characterisation of a novel krill oil nanostructured lipid carrier based on 1,3‐glycerol distearate. Int J Food Sci Technol 2020. [DOI: 10.1111/ijfs.14683] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yunwei Lin
- School of Food Science and Engineering South China University of Technology Guangzhou 510640China
| | - Wenting Yin
- School of Food Science and Technology Henan University of Technology 100 Lianhua Road Zhengzhou 450001China
| | - Guoqin Liu
- School of Food Science and Engineering South China University of Technology Guangzhou 510640China
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Fjære E, Myrmel LS, Dybing K, Kuda O, Holbech Jensen BA, Rossmeisl M, Frøyland L, Kristiansen K, Madsen L. The Anti-Obesogenic Effect of Lean Fish Species is Influenced by the Fatty Acid Composition in Fish Fillets. Nutrients 2020; 12:E3038. [PMID: 33022997 PMCID: PMC7600456 DOI: 10.3390/nu12103038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Revised: 09/29/2020] [Accepted: 10/01/2020] [Indexed: 11/17/2022] Open
Abstract
Fillets from marine fish species contain n-3 polyunsaturated fatty acids (PUFAs) in the form of phospholipids (PLs). To investigate the importance of PL-bound n-3 PUFAs in mediating the anti-obesogenic effect of lean seafood, we compared the anti-obesogenic properties of fillets from cod with fillets from pangasius, a fresh water fish with a very low content of PL-bound n-3 PUFAs. We prepared high-fat/high-protein diets using chicken, cod and pangasius as the protein sources, and fed male C57BL/6J mice these diets for 12 weeks. Mice fed the diet containing cod gained less adipose tissue mass and had smaller white adipocytes than mice fed the chicken-containing diet, whereas mice fed the pangasius-containing diet were in between mice fed the chicken-containing diet and mice fed the cod-containing diet. Of note, mice fed the pangasius-containing diet exhibited reduced glucose tolerance compared to mice fed the cod-containing diet. Although the sum of marine n-3 PUFAs comprised less than 2% of the total fatty acids in the cod-containing diet, this was sufficient to significantly increase the levels of eicosapentaenoic acid (EPA) and docosahexaenoic acids (DHA) in mouse tissues and enhance production of n-3 PUFA-derived lipid mediators as compared with mice fed pangasius or chicken.
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Affiliation(s)
- Even Fjære
- Institute of Marine Research, NO-5817 Bergen, Norway; (E.F.); (L.S.M.); (K.D.); (L.F.)
| | - Lene Secher Myrmel
- Institute of Marine Research, NO-5817 Bergen, Norway; (E.F.); (L.S.M.); (K.D.); (L.F.)
| | - Karianne Dybing
- Institute of Marine Research, NO-5817 Bergen, Norway; (E.F.); (L.S.M.); (K.D.); (L.F.)
| | - Ondrej Kuda
- Department of Adipose Tissue Biology, Institute of Physiology of the Czech Academy of Sciences, 14220 Prague 4, Czech Republic; (O.K.); (M.R.)
| | - Benjamin Anderschou Holbech Jensen
- Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, DK-2200 Copenhagen, Denmark;
| | - Martin Rossmeisl
- Department of Adipose Tissue Biology, Institute of Physiology of the Czech Academy of Sciences, 14220 Prague 4, Czech Republic; (O.K.); (M.R.)
| | - Livar Frøyland
- Institute of Marine Research, NO-5817 Bergen, Norway; (E.F.); (L.S.M.); (K.D.); (L.F.)
| | - Karsten Kristiansen
- Department of Biology, University of Copenhagen, DK-2100 Copenhagen, Denmark;
| | - Lise Madsen
- Institute of Marine Research, NO-5817 Bergen, Norway; (E.F.); (L.S.M.); (K.D.); (L.F.)
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16
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Kroupova P, van Schothorst EM, Keijer J, Bunschoten A, Vodicka M, Irodenko I, Oseeva M, Zacek P, Kopecky J, Rossmeisl M, Horakova O. Omega-3 Phospholipids from Krill Oil Enhance Intestinal Fatty Acid Oxidation More Effectively than Omega-3 Triacylglycerols in High-Fat Diet-Fed Obese Mice. Nutrients 2020; 12:nu12072037. [PMID: 32660007 PMCID: PMC7400938 DOI: 10.3390/nu12072037] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Revised: 07/03/2020] [Accepted: 07/06/2020] [Indexed: 12/19/2022] Open
Abstract
Antisteatotic effects of omega-3 fatty acids (Omega-3) in obese rodents seem to vary depending on the lipid form of their administration. Whether these effects could reflect changes in intestinal metabolism is unknown. Here, we compare Omega-3-containing phospholipids (krill oil; ω3PL-H) and triacylglycerols (ω3TG) in terms of their effects on morphology, gene expression and fatty acid (FA) oxidation in the small intestine. Male C57BL/6N mice were fed for 8 weeks with a high-fat diet (HFD) alone or supplemented with 30 mg/g diet of ω3TG or ω3PL-H. Omega-3 index, reflecting the bioavailability of Omega-3, reached 12.5% and 7.5% in the ω3PL-H and ω3TG groups, respectively. Compared to HFD mice, ω3PL-H but not ω3TG animals had lower body weight gain (−40%), mesenteric adipose tissue (−43%), and hepatic lipid content (−64%). The highest number and expression level of regulated intestinal genes was observed in ω3PL-H mice. The expression of FA ω-oxidation genes was enhanced in both Omega-3-supplemented groups, but gene expression within the FA β-oxidation pathway and functional palmitate oxidation in the proximal ileum was significantly increased only in ω3PL-H mice. In conclusion, enhanced intestinal FA oxidation could contribute to the strong antisteatotic effects of Omega-3 when administered as phospholipids to dietary obese mice.
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Affiliation(s)
- Petra Kroupova
- Laboratory of Adipose Tissue Biology, Institute of Physiology of the Czech Academy of Sciences, Videnska 1083, 14220 Prague, Czech Republic; (P.K.); (I.I.); (M.O.); (J.K.)
| | - Evert M. van Schothorst
- Human and Animal Physiology, Wageningen University, 6708 WD Wageningen, The Netherlands; (E.M.v.S.); (J.K.); (A.B.)
| | - Jaap Keijer
- Human and Animal Physiology, Wageningen University, 6708 WD Wageningen, The Netherlands; (E.M.v.S.); (J.K.); (A.B.)
| | - Annelies Bunschoten
- Human and Animal Physiology, Wageningen University, 6708 WD Wageningen, The Netherlands; (E.M.v.S.); (J.K.); (A.B.)
| | - Martin Vodicka
- Laboratory of Epithelial Physiology, Institute of Physiology of the Czech Academy of Sciences, 14220 Prague, Czech Republic;
| | - Ilaria Irodenko
- Laboratory of Adipose Tissue Biology, Institute of Physiology of the Czech Academy of Sciences, Videnska 1083, 14220 Prague, Czech Republic; (P.K.); (I.I.); (M.O.); (J.K.)
| | - Marina Oseeva
- Laboratory of Adipose Tissue Biology, Institute of Physiology of the Czech Academy of Sciences, Videnska 1083, 14220 Prague, Czech Republic; (P.K.); (I.I.); (M.O.); (J.K.)
| | - Petr Zacek
- Proteomics Core Facility, Faculty of Science, Charles University, Division BIOCEV, 25250 Vestec, Czech Republic;
| | - Jan Kopecky
- Laboratory of Adipose Tissue Biology, Institute of Physiology of the Czech Academy of Sciences, Videnska 1083, 14220 Prague, Czech Republic; (P.K.); (I.I.); (M.O.); (J.K.)
| | - Martin Rossmeisl
- Laboratory of Adipose Tissue Biology, Institute of Physiology of the Czech Academy of Sciences, Videnska 1083, 14220 Prague, Czech Republic; (P.K.); (I.I.); (M.O.); (J.K.)
- Correspondence: (M.R.); (O.H.); Tel.: +420-296443706 (M.R. & O.H.); Fax: +420 296442599 (M.R. & O.H.)
| | - Olga Horakova
- Laboratory of Adipose Tissue Biology, Institute of Physiology of the Czech Academy of Sciences, Videnska 1083, 14220 Prague, Czech Republic; (P.K.); (I.I.); (M.O.); (J.K.)
- Correspondence: (M.R.); (O.H.); Tel.: +420-296443706 (M.R. & O.H.); Fax: +420 296442599 (M.R. & O.H.)
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Jiang Q, Lu C, Sun T, Zhou J, Li Y, Ming T, Bai L, Wang ZJ, Su X. Alterations of the Brain Proteome and Gut Microbiota in d-Galactose-Induced Brain-Aging Mice with Krill Oil Supplementation. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2019; 67:9820-9830. [PMID: 31411471 DOI: 10.1021/acs.jafc.9b03827] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Brain aging is commonly associated with neurodegenerative disorders, but the ameliorative effect of krill oil and the underlying mechanism remain unclear. In this study, the components of krill oil were measured, and the antiaging effects of krill oil were investigated in mice with d-galactose (d-gal)-induced brain aging via proteomics and gut microbiota analysis. Krill oil treatment decreased the expression of truncated dopamine- and cAMP-regulated phosphoproteins and proteins involved in the calcium signaling pathway. In addition, the concentrations of dopamine were increased in the serum (p < 0.05) and brain (p > 0.05) due to the enhanced expressions of tyrosine-3-monooxygenase and aromatic l-amino acid decarboxylase. Moreover, krill oil alleviated gut microbiota dysbiosis, decreased the abundance of bacteria that consume the precursor tyrosine, and increased the abundance of Lactobacillus spp. and short-chain fatty acid producers. This study revealed the beneficial effect of krill oil against d-gal-induced brain aging and clarified the underlying mechanism through proteomics and gut microbiota analysis.
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Affiliation(s)
- Qinqin Jiang
- State Key Laboratory for Quality and Safety of Agro-products and School of Marine Science , Ningbo University , Ningbo 315211 , China
| | - Chenyang Lu
- State Key Laboratory for Quality and Safety of Agro-products and School of Marine Science , Ningbo University , Ningbo 315211 , China
| | - Tingting Sun
- State Key Laboratory for Quality and Safety of Agro-products and School of Marine Science , Ningbo University , Ningbo 315211 , China
| | - Jun Zhou
- State Key Laboratory for Quality and Safety of Agro-products and School of Marine Science , Ningbo University , Ningbo 315211 , China
| | - Ye Li
- State Key Laboratory for Quality and Safety of Agro-products and School of Marine Science , Ningbo University , Ningbo 315211 , China
| | - Tinghong Ming
- State Key Laboratory for Quality and Safety of Agro-products and School of Marine Science , Ningbo University , Ningbo 315211 , China
| | - Linquan Bai
- State Key Laboratory of Microbial Metabolism , Shanghai Jiao Tong University , Shanghai 200030 , China
| | - Zaijie Jim Wang
- Department of Biopharmaceutical Sciences , University of Illinois , Chicago 60607 , United States
| | - Xiurong Su
- State Key Laboratory for Quality and Safety of Agro-products and School of Marine Science , Ningbo University , Ningbo 315211 , China
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Medina-Ceja L, Villalpando-Vargas F, Girón de la Cruz GI, Lara-Vazquez AM, Flores-Mancilla L, Salazar-Sánchez JC, Morales-Villagrán A. Effect of Chronic Krill Oil Supplement on Seizures Induced by Pentylenetetrazole in the Hippocampus of Adult Rats with Previous Febrile Seizures. J Food Sci 2019; 84:1703-1711. [PMID: 31218711 DOI: 10.1111/1750-3841.14679] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2018] [Revised: 04/19/2019] [Accepted: 05/05/2019] [Indexed: 11/28/2022]
Abstract
We evaluated the effect of krill oil (KO) supplement on seizures induced by pentylenetetrazole (PTZ) in animals with previous febrile seizures (FSs) induced by hyperthermia to determine its effectiveness in seizure susceptibility and as an anticonvulsant. Male Wistar rats with FS separated into water (W, 1 mL), palm oil (PO, 300 mg/kg, total volume 1 mL), or KO (300 mg/kg, total volume 1 mL) groups. All drugs were administered chronically via the intragastric route. Electrical activity was recorded by intracranial EEG simultaneously with convulsive behavior. All animals' brains were processed by immunofluorescence against GFAP, NeuN, and connexins (Cx); cellular quantification was performed in hippocampus and pyramidal or granular layer thickness was evaluated with cresyl violet (CV) staining. The results showed a significant delay in convulsive behavior and a slight increased survival time after PTZ administration in the group treated with KO compared with PO and W groups. The epileptiform activity showed high amplitude and frequency, with no significant differences between groups, nor were there differences in the number and duration of discharge trains. KO and PO increased the number of astrocytes and the number of neurons compared with the W group. KO and PO decreased the expression of Cx36 without affecting Cx43 expression or the thickness of layers. Based on these data, we consider it important to perform more experiments to determine the anticonvulsant role of KO, taking into account the partial effect found in this study. KO could be used as a coadjuvant of traditional anticonvulsive treatments. PRACTICAL APPLICATION: In this study was evaluated the anticonvulsive effect of a chronic krill oil (KO) supplement in animals with seizures. Results showed that KO had partial anticonvulsive effects measured by EEG activity and convulsive behavior analysis. These data justify further research that looks at KO supplementation as a prospective coadjuvant of pharmacologic management of seizure disorder.
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Affiliation(s)
- Laura Medina-Ceja
- Laboratory of Neurophysiology, Dept. of Cellular and Molecular Biology, CUCBA, Univ. of Guadalajara, Jalisco, México
| | - Fridha Villalpando-Vargas
- Laboratory of Neurophysiology, Dept. of Cellular and Molecular Biology, CUCBA, Univ. of Guadalajara, Jalisco, México
| | - Gloria I Girón de la Cruz
- Laboratory of Neurophysiology, Dept. of Cellular and Molecular Biology, CUCBA, Univ. of Guadalajara, Jalisco, México
| | - Adriana M Lara-Vazquez
- Laboratory of Neurophysiology, Dept. of Cellular and Molecular Biology, CUCBA, Univ. of Guadalajara, Jalisco, México
| | - Leopoldo Flores-Mancilla
- Laboratory of Neurophysiology and Behavior, Human Medicine and Health Science Academic Unit, Autonomous Univ. of Zacatecas, Zacatecas, México
| | - Juan C Salazar-Sánchez
- Laboratory of Neurophysiology, Dept. of Cellular and Molecular Biology, CUCBA, Univ. of Guadalajara, Jalisco, México
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Xie D, Gong M, Wei W, Jin J, Wang X, Wang X, Jin Q. Antarctic Krill (Euphausia superba) Oil: A Comprehensive Review of Chemical Composition, Extraction Technologies, Health Benefits, and Current Applications. Compr Rev Food Sci Food Saf 2019; 18:514-534. [PMID: 33336946 DOI: 10.1111/1541-4337.12427] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Revised: 01/06/2019] [Accepted: 01/07/2019] [Indexed: 12/14/2022]
Abstract
Antarctic krill (Euphausia superba) oil has been receiving increasing attention due to its nutritional and functional potentials. However, its application as a novel food ingredient has not yet been fully explored. This review summarizes the chemical composition, extraction technologies, potential health benefits, and current applications of krill oil, with the aim of providing suggestions for its exploitation. Krill oil is a unique lipid consisting of diverse lipid classes and is characterized by a high concentration (39.29% to 80.69%) of phospholipids (PLs) associated with eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA). It also contains considerable amounts of bioactive minor components such as astaxanthin, sterols, tocopherols, vitamin A, flavonoids, and minerals. The current technologies used in krill oil production are solvent extraction, nonsolvent extraction, super/subcritical fluid extraction, and enzyme-assisted pretreatment extraction, which all greatly influence the yield and quality of the end-product. In addition, krill oil has been documented to have various health benefits, including anti-inflammatory effects, cardiovascular disease (CVD) prevention, women's health, neuroprotection, and anticancer activities. Although krill oil products used for dietary supplements have been commercially available, few studies have attempted to explore the underlying molecular mechanisms to elucidate how exactly the krill oil exerts different biological activities. Further studies should focus on this to improve the development of krill oil products for human consumption.
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Affiliation(s)
- Dan Xie
- the Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Natl. Engineering Research Center for Functional Food, School of Food Science and Technology, Jiangnan Univ., 1800 Lihu Avenue, Wuxi, Jiangsu, 214122, P. R. China.,the Zhonghai Ocean (Wuxi) Marine Equipment Engineering Co. Ltd., Jiangnan Univ. Natl. Univ. Science Park, 100 Jinxi Road, Wuxi, Jiangsu, 214125, P. R. China
| | - Mengyue Gong
- the Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Natl. Engineering Research Center for Functional Food, School of Food Science and Technology, Jiangnan Univ., 1800 Lihu Avenue, Wuxi, Jiangsu, 214122, P. R. China
| | - Wei Wei
- the Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Natl. Engineering Research Center for Functional Food, School of Food Science and Technology, Jiangnan Univ., 1800 Lihu Avenue, Wuxi, Jiangsu, 214122, P. R. China
| | - Jun Jin
- the Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Natl. Engineering Research Center for Functional Food, School of Food Science and Technology, Jiangnan Univ., 1800 Lihu Avenue, Wuxi, Jiangsu, 214122, P. R. China
| | - Xiaosan Wang
- the Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Natl. Engineering Research Center for Functional Food, School of Food Science and Technology, Jiangnan Univ., 1800 Lihu Avenue, Wuxi, Jiangsu, 214122, P. R. China
| | - Xingguo Wang
- the Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Natl. Engineering Research Center for Functional Food, School of Food Science and Technology, Jiangnan Univ., 1800 Lihu Avenue, Wuxi, Jiangsu, 214122, P. R. China
| | - Qingzhe Jin
- the Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Natl. Engineering Research Center for Functional Food, School of Food Science and Technology, Jiangnan Univ., 1800 Lihu Avenue, Wuxi, Jiangsu, 214122, P. R. China
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Zhang LY, Ding L, Shi HH, Xu J, Xue CH, Zhang TT, Wang YM. Eicosapentaenoic acid in the form of phospholipids exerts superior anti-atherosclerosis effects to its triglyceride form in ApoE−/−mice. Food Funct 2019; 10:4177-4188. [DOI: 10.1039/c9fo00868c] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
EPA-PL was superior to EPA-TG in reducing lesion progression by modulating hepatic lipid metabolism and decreasing inflammation in the artery wall and circulatory system, which might be attributed to the structural differences at the sn-3 position.
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Affiliation(s)
- Ling-Yu Zhang
- College of Food Science and Engineering
- Ocean University of China
- Qingdao
- China
| | - Lin Ding
- College of Food Science and Engineering
- Ocean University of China
- Qingdao
- China
| | - Hao-Hao Shi
- College of Food Science and Engineering
- Ocean University of China
- Qingdao
- China
| | - Jie Xu
- College of Food Science and Engineering
- Ocean University of China
- Qingdao
- China
| | - Chang-Hu Xue
- College of Food Science and Engineering
- Ocean University of China
- Qingdao
- China
- Qingdao National Laboratory for Marine Science and Technology
| | - Tian-Tian Zhang
- College of Food Science and Engineering
- Ocean University of China
- Qingdao
- China
| | - Yu-Ming Wang
- College of Food Science and Engineering
- Ocean University of China
- Qingdao
- China
- Qingdao National Laboratory for Marine Science and Technology
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21
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Yeral I, Sayan CD, Karaca G, Simsek Y, Sagsoz N, Ozkan ZS, Atasoy P, Sahin Y, Neselioglu S, Erel O. What is the protective effect of krill oil on rat ovary against ischemia-reperfusion injury? J Obstet Gynaecol Res 2018; 45:592-599. [DOI: 10.1111/jog.13876] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Accepted: 11/02/2018] [Indexed: 11/26/2022]
Affiliation(s)
- Ilkin Yeral
- Department of Obstetrics and Gynecology; Kırıkkale University Faculty of Medicine; Kırıkkale Turkey
| | - Cemile D. Sayan
- Department of Obstetrics and Gynecology; Kırıkkale University Faculty of Medicine; Kırıkkale Turkey
| | - Gökhan Karaca
- Department of General Surgery; Kırıkkale University Faculty of Medicine; Kırıkkale Turkey
| | - Yavuz Simsek
- Yavuz Simsek Women's Health Center; Kırıkkale Turkey
| | - Nevin Sagsoz
- Department of Obstetrics and Gynecology; Kırıkkale University Faculty of Medicine; Kırıkkale Turkey
| | - Zehra S. Ozkan
- Department of Obstetrics and Gynecology; Kırıkkale University Faculty of Medicine; Kırıkkale Turkey
| | - Pınar Atasoy
- Department of Pathology; Kırıkkale University Faculty of Medicine; Kırıkkale Turkey
| | - Yasar Sahin
- Kırıkkale University Faculty of Veterinary Medicine; Kırıkkale Turkey
| | - Salim Neselioglu
- Department of Clinical Biochemistry; Yıldırım Beyazıt University Faculty of Medicine; Ankara Turkey
| | - Ozcan Erel
- Department of Clinical Biochemistry; Yıldırım Beyazıt University Faculty of Medicine; Ankara Turkey
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22
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Song J, Guo J, Zhang S, Gong Y. Properties of cellulose/Antarctic krill protein composite fibers prepared in different coagulation baths. Int J Biol Macromol 2018; 114:334-340. [DOI: 10.1016/j.ijbiomac.2018.03.118] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Revised: 02/05/2018] [Accepted: 03/21/2018] [Indexed: 10/17/2022]
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23
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Fauske KR, Bernhard A, Fjære E, Myrmel LS, Frøyland L, Kristiansen K, Liaset B, Madsen L. Effects of Frozen Storage on Phospholipid Content in Atlantic Cod Fillets and the Influence on Diet-Induced Obesity in Mice. Nutrients 2018; 10:nu10060695. [PMID: 29848963 PMCID: PMC6024676 DOI: 10.3390/nu10060695] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2018] [Revised: 05/25/2018] [Accepted: 05/28/2018] [Indexed: 12/29/2022] Open
Abstract
A large fraction of the n-3 polyunsaturated fatty acids (PUFAs) in cod fillet is present in the form of phospholipids (PLs). Freezing initiates hydrolysis of the PLs present in the fillet. Here, we compared the effects of Western diets based on frozen cod, fresh cod or pork with a diet based on casein in male C57BL/6J mice fed for 12 weeks at thermoneutrality. Diets based on fresh cod contained more PL-bound n-3 PUFAs (3.12 mg/g diet) than diets based on frozen cod (1.9 mg/g diet). Mice fed diets containing pork and fresh cod, but not frozen cod, gained more body and fat mass than casein-fed mice. Additionally, the bioavailability of n-3 PUFAs present in the cod fillets was not influenced by storage conditions. In a second experiment, diets with pork as the protein source were supplemented with n-3 PUFAs in the form of PL or triacylglycerol (TAG) to match the levels of the diet containing fresh cod. Adding PL-bound, but not TAG-bound, n-3 PUFAs, to the pork-based diet increased body and fat mass gain. Thus, supplementation with PL-bound n-3 PUFAs did not protect against, but rather promoted, obesity development in mice fed a pork-based diet.
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Affiliation(s)
- Kristin Røen Fauske
- Institute of Marine Research, P.O. Box 7800, 5020 Bergen, Norway.
- Department of Biomedicine, University of Bergen, 5020 Bergen, Norway.
| | - Annette Bernhard
- Institute of Marine Research, P.O. Box 7800, 5020 Bergen, Norway.
| | - Even Fjære
- Institute of Marine Research, P.O. Box 7800, 5020 Bergen, Norway.
| | | | - Livar Frøyland
- Institute of Marine Research, P.O. Box 7800, 5020 Bergen, Norway.
- Department of Biomedicine, University of Bergen, 5020 Bergen, Norway.
| | | | - Bjørn Liaset
- Institute of Marine Research, P.O. Box 7800, 5020 Bergen, Norway.
| | - Lise Madsen
- Institute of Marine Research, P.O. Box 7800, 5020 Bergen, Norway.
- Department of Biology, University of Copenhagen, 2100 Copenhagen, Denmark.
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24
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Ding L, Zhang T, Che H, Zhang L, Xue C, Chang Y, Wang Y. DHA-Enriched Phosphatidylcholine and DHA-Enriched Phosphatidylserine Improve Age-Related Lipid Metabolic Disorder through Different Metabolism in the Senescence-Accelerated Mouse. EUR J LIPID SCI TECH 2018. [DOI: 10.1002/ejlt.201700490] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Lin Ding
- College of Food Science and Engineering; Ocean University of China; No. 5 Yushan Road,Qingdao 266003 Shandong Province P.R. China
| | - Tiantian Zhang
- College of Food Science and Engineering; Ocean University of China; No. 5 Yushan Road,Qingdao 266003 Shandong Province P.R. China
| | - Hongxia Che
- College of Food Science and Engineering; Ocean University of China; No. 5 Yushan Road,Qingdao 266003 Shandong Province P.R. China
| | - Lingyu Zhang
- College of Food Science and Engineering; Ocean University of China; No. 5 Yushan Road,Qingdao 266003 Shandong Province P.R. China
| | - Changhu Xue
- College of Food Science and Engineering; Ocean University of China; No. 5 Yushan Road,Qingdao 266003 Shandong Province P.R. China
- Qingdao National Laboratory for Marine Science and Technology; Laboratory of Marine Drugs and Biological Products; Qingdao 266237 P.R. China
| | - Yaoguang Chang
- College of Food Science and Engineering; Ocean University of China; No. 5 Yushan Road,Qingdao 266003 Shandong Province P.R. China
| | - Yuming Wang
- College of Food Science and Engineering; Ocean University of China; No. 5 Yushan Road,Qingdao 266003 Shandong Province P.R. China
- Qingdao National Laboratory for Marine Science and Technology; Laboratory of Marine Drugs and Biological Products; Qingdao 266237 P.R. China
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25
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Liu Y, Tian Y, Cong P, Chen Q, Li H, Fan Y, Xu J, Wang J, Wang Y, Xue C. Lipid Degradation During Salt-Fermented Antarctic Krill Paste Processing and Their Relationship With Lipase and Phospholipase Activities. EUR J LIPID SCI TECH 2018. [DOI: 10.1002/ejlt.201700443] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Yanjun Liu
- College of Food Science and Engineering; Ocean University of China; 5 Yushan Road Qingdao 266003 Shandong Province China
| | - Yingying Tian
- Qingdao National Laboratory for Marine Science and Technology; Qingdao 266237 China
| | - Peixu Cong
- College of Food Science and Engineering; Ocean University of China; 5 Yushan Road Qingdao 266003 Shandong Province China
| | - Qinsheng Chen
- College of Food Science and Engineering; Ocean University of China; 5 Yushan Road Qingdao 266003 Shandong Province China
| | - Hongyan Li
- College of Food Science and Engineering; Ocean University of China; 5 Yushan Road Qingdao 266003 Shandong Province China
| | - Yan Fan
- College of Food Science and Engineering; Ocean University of China; 5 Yushan Road Qingdao 266003 Shandong Province China
| | - Jie Xu
- College of Food Science and Engineering; Ocean University of China; 5 Yushan Road Qingdao 266003 Shandong Province China
| | - Jingfeng Wang
- College of Food Science and Engineering; Ocean University of China; 5 Yushan Road Qingdao 266003 Shandong Province China
| | - Yuming Wang
- College of Food Science and Engineering; Ocean University of China; 5 Yushan Road Qingdao 266003 Shandong Province China
| | - Changhu Xue
- College of Food Science and Engineering; Ocean University of China; 5 Yushan Road Qingdao 266003 Shandong Province China
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26
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Sun D, Zhang L, Chen H, Feng R, Cao P, Liu Y. Effects of Antarctic krill oil on lipid and glucose metabolism in C57BL/6J mice fed with high fat diet. Lipids Health Dis 2017; 16:218. [PMID: 29157255 PMCID: PMC5697064 DOI: 10.1186/s12944-017-0601-8] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2017] [Accepted: 10/30/2017] [Indexed: 12/04/2022] Open
Abstract
Background Obesity and other metabolic diseases have become epidemic which greatly affect human health. Diets with healthy nutrition are efficient means to prevent this epidemic occurrence. Novel food resources and process technology were needed for these purpose. In this study, Antarctic krill oil (KO) extracted from a dry krill by a procedure of hot pump dehydration in combined with freezing-drying was used to investigate health effect in animals including the growth, lipid and glucose metabolism. Methods C57BL/6J mice were fed with a lard based high fat (HF) diet and substituted with KO for a period of 12 weeks in comparison with low fat normal control (NC) diet. Mice body weight and food consumption were recorded. Serum lipid metabolism - of C57BL/6J mice serum was measured. A glucose tolerance tests (GTTs) and pathology analysis of mice were performed at the end of the experiment. Results The KO fed mice had less body weight gain, less fat accumulation in tissue such as adipose and liver. Dyslipidemia induced by high fat diet was partially improved by KO feeding with significant reduction of serum low density lipoprotein-cholesterol (LDL-C) content. Furthermore, KO feeding also improved glucose metabolism in C57BL/6J mice including a glucose tolerance of about 22% vs. 32% of AUC (area under the curve) for KO vs HF diet and the fast blood glucose level of 8.5 mmol/L, 9.8 mmol/L and 9.3 mmol/L for NC, HF and KO diet groups, respectively. In addition, KO feeding also reduced oxidative damage in liver with a decrease of malondialdehyde (MDA) content and increase of superoxide dismutase (SOD) content. Conclusion This study provided evidence of the beneficial effects of KO on animal health from the processed technology, particularly on lipid and glucose metabolism. This study confirmed that as the Antarctic krill was extracted with a procedure of efficient energy, it might make it possible for Krill oil to be available for food industry.
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Affiliation(s)
- Dewei Sun
- State Key Laboratory of Food Science and Technology, Synergetic Innovation Center of Food Safety and Nutrition, School of Food Science and Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi, Jiangsu, 214122, People's Republic of China
| | - Liang Zhang
- State Key Laboratory of Food Science and Technology, Synergetic Innovation Center of Food Safety and Nutrition, School of Food Science and Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi, Jiangsu, 214122, People's Republic of China
| | - Hongjian Chen
- State Key Laboratory of Food Science and Technology, Synergetic Innovation Center of Food Safety and Nutrition, School of Food Science and Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi, Jiangsu, 214122, People's Republic of China
| | - Rong Feng
- State Key Laboratory of Food Science and Technology, Synergetic Innovation Center of Food Safety and Nutrition, School of Food Science and Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi, Jiangsu, 214122, People's Republic of China
| | - Peirang Cao
- State Key Laboratory of Food Science and Technology, Synergetic Innovation Center of Food Safety and Nutrition, School of Food Science and Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi, Jiangsu, 214122, People's Republic of China.
| | - Yuanfa Liu
- State Key Laboratory of Food Science and Technology, Synergetic Innovation Center of Food Safety and Nutrition, School of Food Science and Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi, Jiangsu, 214122, People's Republic of China.
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27
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Parolini C, Bjorndal B, Busnelli M, Manzini S, Ganzetti GS, Dellera F, Ramsvik M, Bruheim I, Berge RK, Chiesa G. Effect of Dietary Components from Antarctic Krill on Atherosclerosis in apoE-Deficient Mice. Mol Nutr Food Res 2017; 61. [PMID: 28812326 DOI: 10.1002/mnfr.201700098] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2017] [Revised: 07/25/2017] [Indexed: 12/22/2022]
Abstract
SCOPE Antarctic krill is a great source of n-3 fatty acids and high-quality proteins. Aim of the study was to evaluate the effect of Antarctic krill components on plasma lipids and atherosclerosis development. METHODS AND RESULTS Sixty apoEKO mice were divided into four groups and fed Western diet (CONTROL) or Western-like diets, differing for protein or fat content. Specifically, casein or fat in CONTROL was partially replaced by krill proteins (PRO), krill oil (KRILL OIL), or both (KRILL OIL+PRO). In KRILL OIL+PRO and KRILL OIL, cholesterol levels were significantly lower than in CONTROL group. Atherosclerosis in aorta of PRO, KRILL OIL and KRILL OIL+PRO was lower than in CONTROL, whereas, at the aortic sinus, atherosclerosis reduction was only observed in KRILL OIL. Liver steatosis, commonly present in CONTROL and PRO animals, was sporadic in KRILL OIL+PRO and KRILL OIL mice. Krill oil containing diets affected the expression of genes involved in cholesterol metabolism, mainly HMG-CoA reductase. No reduced systemic inflammation was found in all groups. CONCLUSION Krill oil containing diets were able to reduce cholesterol levels, inhibit plaque development and prevent liver damage. Krill proteins also reduced atherosclerosis development through mechanisms not involving lipid metabolism.
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Affiliation(s)
- Cinzia Parolini
- Department of Pharmacological and Biomolecular Sciences, Università degli Studi di Milano, Milano, Italy
| | - Bodil Bjorndal
- Department of Clinical Science, University of Bergen, N-5020, Bergen, Norway
| | - Marco Busnelli
- Department of Pharmacological and Biomolecular Sciences, Università degli Studi di Milano, Milano, Italy
| | - Stefano Manzini
- Department of Pharmacological and Biomolecular Sciences, Università degli Studi di Milano, Milano, Italy
| | - Giulia S Ganzetti
- Department of Pharmacological and Biomolecular Sciences, Università degli Studi di Milano, Milano, Italy
| | - Federica Dellera
- Department of Pharmacological and Biomolecular Sciences, Università degli Studi di Milano, Milano, Italy
| | - Marie Ramsvik
- Department of Clinical Science, University of Bergen, N-5020, Bergen, Norway.,Rimfrost AS, N-6099, Fosnavaag, Norway
| | | | - Rolf Kristian Berge
- Department of Clinical Science, University of Bergen, N-5020, Bergen, Norway
| | - Giulia Chiesa
- Department of Pharmacological and Biomolecular Sciences, Università degli Studi di Milano, Milano, Italy
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28
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Ursoniu S, Sahebkar A, Serban MC, Antal D, Mikhailidis DP, Cicero A, Athyros V, Rizzo M, Rysz J, Banach M. Lipid-modifying effects of krill oil in humans: systematic review and meta-analysis of randomized controlled trials. Nutr Rev 2017; 75:361-373. [PMID: 28371906 DOI: 10.1093/nutrit/nuw063] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
Context Some experimental and clinical trials have shown that krill oil, extracted from small red crustaceans, might be an effective lipid-modifying agent, but the evidence is not conclusive. Objective The effect of krill oil supplements on plasma lipid concentrations was assessed through a systematic review of the literature and a meta-analysis of available randomized controlled trials. Data sources PubMed and Scopus were searched up to March 25, 2016, to identify RCTs investigating the effect of krill oil supplements on plasma lipids. Study selection Randomized controlled trials that investigated the impact of at least 2 weeks of supplementation with krill oil on plasma/serum concentrations of at least one of the main lipid parameters (ie, total cholesterol, low-density lipoprotein cholesterol, high-density lipoprotein cholesterol, or triglycerides) and that reported sufficient information on plasma/serum lipid levels at baseline and at the end of study in both krill oil and control groups were eligible for inclusion. Data extraction Two reviewers independently extracted the following data: first author's name, year of publication, study location, study design, number of participants in the krill oil and control groups, dosage of krill oil, type of control allocation, treatment duration, demographic characteristics of study participants, and baseline and follow-up plasma concentrations of lipids. Effect size was expressed as the weighted mean difference (WMD) and 95% confidence interval (95%CI). Results Meta-analysis of data from 7 eligible trials (14 treatment arms) with 662 participants showed a significant reduction in plasma concentrations of low-density lipoprotein cholesterol (WMD, -15.52 mg/dL; 95%CI, -28.43 to -2.61; P = 0.018) and triglycerides (WMD, -14.03 mg/dL; 95%CI, -21.38 to -6.67; P < 0.001) following supplementation with krill oil. A significant elevation in plasma concentrations of high-density lipoprotein cholesterol was also observed (WMD, 6.65 mg/dL; 95%CI, 2.30 to 10.99; P = 0.003), while a reduction in plasma concentrations of total cholesterol did not reach statistical significance (WMD, -7.50 mg/dL; 95%CI, -17.94 to 2.93; P = 0.159). Conclusion Krill oil supplementation can reduce low-density lipoprotein cholesterol and triglycerides. Additional clinical studies with more participants are needed to assess the impact of krill oil supplementation on other indices of cardiometabolic risk and on the risk of cardiovascular outcomes.
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Affiliation(s)
- Sorin Ursoniu
- S. Ursoniu is with the Department of Functional Sciences, Discipline of Public Health, Victor Babes University of Medicine and Pharmacy, Timisoara, Romania. A. Sahebkar is with the Biotechnology Research Center, Mashhad University of Medical Sciences, Mashhad, Iran. M.-C. Serban is with the Department of Functional Sciences, Discipline of Pathophysiology, Victor Babes University of Medicine and Pharmacy, Timisoara, Romania. D. Antal is with the Discipline of Pharmaceutical Botany, Faculty of Pharmacy, Victor Babes University of Medicine and Pharmacy, Timisoara, Romania. D.P. Mikhailidis is with the Department of Clinical Biochemistry, Royal Free Campus, University College London Medical School, University College London, London, United Kingdom. A. Cicero is with the Medical & Surgical Sciences Department, Alma Mater Studiorum - University of Bologna, Bologna, Italy. V. Athyros is with the Second Propedeutic Department of Internal Medicine, Medical School, Aristotle University of Thessaloniki, Hippocration General Hospital, Thessaloniki, Greece. M. Rizzo is with the Biomedical Department of Internal Medicine and Medical Specialties, University of Palermo, Palermo, Italy. J. Rysz and M. Banach are with the Department of Hypertension, Medical University of Lodz, Lodz, Poland
| | - Amirhossein Sahebkar
- S. Ursoniu is with the Department of Functional Sciences, Discipline of Public Health, Victor Babes University of Medicine and Pharmacy, Timisoara, Romania. A. Sahebkar is with the Biotechnology Research Center, Mashhad University of Medical Sciences, Mashhad, Iran. M.-C. Serban is with the Department of Functional Sciences, Discipline of Pathophysiology, Victor Babes University of Medicine and Pharmacy, Timisoara, Romania. D. Antal is with the Discipline of Pharmaceutical Botany, Faculty of Pharmacy, Victor Babes University of Medicine and Pharmacy, Timisoara, Romania. D.P. Mikhailidis is with the Department of Clinical Biochemistry, Royal Free Campus, University College London Medical School, University College London, London, United Kingdom. A. Cicero is with the Medical & Surgical Sciences Department, Alma Mater Studiorum - University of Bologna, Bologna, Italy. V. Athyros is with the Second Propedeutic Department of Internal Medicine, Medical School, Aristotle University of Thessaloniki, Hippocration General Hospital, Thessaloniki, Greece. M. Rizzo is with the Biomedical Department of Internal Medicine and Medical Specialties, University of Palermo, Palermo, Italy. J. Rysz and M. Banach are with the Department of Hypertension, Medical University of Lodz, Lodz, Poland
| | - Maria-Corina Serban
- S. Ursoniu is with the Department of Functional Sciences, Discipline of Public Health, Victor Babes University of Medicine and Pharmacy, Timisoara, Romania. A. Sahebkar is with the Biotechnology Research Center, Mashhad University of Medical Sciences, Mashhad, Iran. M.-C. Serban is with the Department of Functional Sciences, Discipline of Pathophysiology, Victor Babes University of Medicine and Pharmacy, Timisoara, Romania. D. Antal is with the Discipline of Pharmaceutical Botany, Faculty of Pharmacy, Victor Babes University of Medicine and Pharmacy, Timisoara, Romania. D.P. Mikhailidis is with the Department of Clinical Biochemistry, Royal Free Campus, University College London Medical School, University College London, London, United Kingdom. A. Cicero is with the Medical & Surgical Sciences Department, Alma Mater Studiorum - University of Bologna, Bologna, Italy. V. Athyros is with the Second Propedeutic Department of Internal Medicine, Medical School, Aristotle University of Thessaloniki, Hippocration General Hospital, Thessaloniki, Greece. M. Rizzo is with the Biomedical Department of Internal Medicine and Medical Specialties, University of Palermo, Palermo, Italy. J. Rysz and M. Banach are with the Department of Hypertension, Medical University of Lodz, Lodz, Poland
| | - Diana Antal
- S. Ursoniu is with the Department of Functional Sciences, Discipline of Public Health, Victor Babes University of Medicine and Pharmacy, Timisoara, Romania. A. Sahebkar is with the Biotechnology Research Center, Mashhad University of Medical Sciences, Mashhad, Iran. M.-C. Serban is with the Department of Functional Sciences, Discipline of Pathophysiology, Victor Babes University of Medicine and Pharmacy, Timisoara, Romania. D. Antal is with the Discipline of Pharmaceutical Botany, Faculty of Pharmacy, Victor Babes University of Medicine and Pharmacy, Timisoara, Romania. D.P. Mikhailidis is with the Department of Clinical Biochemistry, Royal Free Campus, University College London Medical School, University College London, London, United Kingdom. A. Cicero is with the Medical & Surgical Sciences Department, Alma Mater Studiorum - University of Bologna, Bologna, Italy. V. Athyros is with the Second Propedeutic Department of Internal Medicine, Medical School, Aristotle University of Thessaloniki, Hippocration General Hospital, Thessaloniki, Greece. M. Rizzo is with the Biomedical Department of Internal Medicine and Medical Specialties, University of Palermo, Palermo, Italy. J. Rysz and M. Banach are with the Department of Hypertension, Medical University of Lodz, Lodz, Poland
| | - Dimitri P Mikhailidis
- S. Ursoniu is with the Department of Functional Sciences, Discipline of Public Health, Victor Babes University of Medicine and Pharmacy, Timisoara, Romania. A. Sahebkar is with the Biotechnology Research Center, Mashhad University of Medical Sciences, Mashhad, Iran. M.-C. Serban is with the Department of Functional Sciences, Discipline of Pathophysiology, Victor Babes University of Medicine and Pharmacy, Timisoara, Romania. D. Antal is with the Discipline of Pharmaceutical Botany, Faculty of Pharmacy, Victor Babes University of Medicine and Pharmacy, Timisoara, Romania. D.P. Mikhailidis is with the Department of Clinical Biochemistry, Royal Free Campus, University College London Medical School, University College London, London, United Kingdom. A. Cicero is with the Medical & Surgical Sciences Department, Alma Mater Studiorum - University of Bologna, Bologna, Italy. V. Athyros is with the Second Propedeutic Department of Internal Medicine, Medical School, Aristotle University of Thessaloniki, Hippocration General Hospital, Thessaloniki, Greece. M. Rizzo is with the Biomedical Department of Internal Medicine and Medical Specialties, University of Palermo, Palermo, Italy. J. Rysz and M. Banach are with the Department of Hypertension, Medical University of Lodz, Lodz, Poland
| | - Arrigo Cicero
- S. Ursoniu is with the Department of Functional Sciences, Discipline of Public Health, Victor Babes University of Medicine and Pharmacy, Timisoara, Romania. A. Sahebkar is with the Biotechnology Research Center, Mashhad University of Medical Sciences, Mashhad, Iran. M.-C. Serban is with the Department of Functional Sciences, Discipline of Pathophysiology, Victor Babes University of Medicine and Pharmacy, Timisoara, Romania. D. Antal is with the Discipline of Pharmaceutical Botany, Faculty of Pharmacy, Victor Babes University of Medicine and Pharmacy, Timisoara, Romania. D.P. Mikhailidis is with the Department of Clinical Biochemistry, Royal Free Campus, University College London Medical School, University College London, London, United Kingdom. A. Cicero is with the Medical & Surgical Sciences Department, Alma Mater Studiorum - University of Bologna, Bologna, Italy. V. Athyros is with the Second Propedeutic Department of Internal Medicine, Medical School, Aristotle University of Thessaloniki, Hippocration General Hospital, Thessaloniki, Greece. M. Rizzo is with the Biomedical Department of Internal Medicine and Medical Specialties, University of Palermo, Palermo, Italy. J. Rysz and M. Banach are with the Department of Hypertension, Medical University of Lodz, Lodz, Poland
| | - Vasilios Athyros
- S. Ursoniu is with the Department of Functional Sciences, Discipline of Public Health, Victor Babes University of Medicine and Pharmacy, Timisoara, Romania. A. Sahebkar is with the Biotechnology Research Center, Mashhad University of Medical Sciences, Mashhad, Iran. M.-C. Serban is with the Department of Functional Sciences, Discipline of Pathophysiology, Victor Babes University of Medicine and Pharmacy, Timisoara, Romania. D. Antal is with the Discipline of Pharmaceutical Botany, Faculty of Pharmacy, Victor Babes University of Medicine and Pharmacy, Timisoara, Romania. D.P. Mikhailidis is with the Department of Clinical Biochemistry, Royal Free Campus, University College London Medical School, University College London, London, United Kingdom. A. Cicero is with the Medical & Surgical Sciences Department, Alma Mater Studiorum - University of Bologna, Bologna, Italy. V. Athyros is with the Second Propedeutic Department of Internal Medicine, Medical School, Aristotle University of Thessaloniki, Hippocration General Hospital, Thessaloniki, Greece. M. Rizzo is with the Biomedical Department of Internal Medicine and Medical Specialties, University of Palermo, Palermo, Italy. J. Rysz and M. Banach are with the Department of Hypertension, Medical University of Lodz, Lodz, Poland
| | - Manfredi Rizzo
- S. Ursoniu is with the Department of Functional Sciences, Discipline of Public Health, Victor Babes University of Medicine and Pharmacy, Timisoara, Romania. A. Sahebkar is with the Biotechnology Research Center, Mashhad University of Medical Sciences, Mashhad, Iran. M.-C. Serban is with the Department of Functional Sciences, Discipline of Pathophysiology, Victor Babes University of Medicine and Pharmacy, Timisoara, Romania. D. Antal is with the Discipline of Pharmaceutical Botany, Faculty of Pharmacy, Victor Babes University of Medicine and Pharmacy, Timisoara, Romania. D.P. Mikhailidis is with the Department of Clinical Biochemistry, Royal Free Campus, University College London Medical School, University College London, London, United Kingdom. A. Cicero is with the Medical & Surgical Sciences Department, Alma Mater Studiorum - University of Bologna, Bologna, Italy. V. Athyros is with the Second Propedeutic Department of Internal Medicine, Medical School, Aristotle University of Thessaloniki, Hippocration General Hospital, Thessaloniki, Greece. M. Rizzo is with the Biomedical Department of Internal Medicine and Medical Specialties, University of Palermo, Palermo, Italy. J. Rysz and M. Banach are with the Department of Hypertension, Medical University of Lodz, Lodz, Poland
| | - Jacek Rysz
- S. Ursoniu is with the Department of Functional Sciences, Discipline of Public Health, Victor Babes University of Medicine and Pharmacy, Timisoara, Romania. A. Sahebkar is with the Biotechnology Research Center, Mashhad University of Medical Sciences, Mashhad, Iran. M.-C. Serban is with the Department of Functional Sciences, Discipline of Pathophysiology, Victor Babes University of Medicine and Pharmacy, Timisoara, Romania. D. Antal is with the Discipline of Pharmaceutical Botany, Faculty of Pharmacy, Victor Babes University of Medicine and Pharmacy, Timisoara, Romania. D.P. Mikhailidis is with the Department of Clinical Biochemistry, Royal Free Campus, University College London Medical School, University College London, London, United Kingdom. A. Cicero is with the Medical & Surgical Sciences Department, Alma Mater Studiorum - University of Bologna, Bologna, Italy. V. Athyros is with the Second Propedeutic Department of Internal Medicine, Medical School, Aristotle University of Thessaloniki, Hippocration General Hospital, Thessaloniki, Greece. M. Rizzo is with the Biomedical Department of Internal Medicine and Medical Specialties, University of Palermo, Palermo, Italy. J. Rysz and M. Banach are with the Department of Hypertension, Medical University of Lodz, Lodz, Poland
| | - Maciej Banach
- S. Ursoniu is with the Department of Functional Sciences, Discipline of Public Health, Victor Babes University of Medicine and Pharmacy, Timisoara, Romania. A. Sahebkar is with the Biotechnology Research Center, Mashhad University of Medical Sciences, Mashhad, Iran. M.-C. Serban is with the Department of Functional Sciences, Discipline of Pathophysiology, Victor Babes University of Medicine and Pharmacy, Timisoara, Romania. D. Antal is with the Discipline of Pharmaceutical Botany, Faculty of Pharmacy, Victor Babes University of Medicine and Pharmacy, Timisoara, Romania. D.P. Mikhailidis is with the Department of Clinical Biochemistry, Royal Free Campus, University College London Medical School, University College London, London, United Kingdom. A. Cicero is with the Medical & Surgical Sciences Department, Alma Mater Studiorum - University of Bologna, Bologna, Italy. V. Athyros is with the Second Propedeutic Department of Internal Medicine, Medical School, Aristotle University of Thessaloniki, Hippocration General Hospital, Thessaloniki, Greece. M. Rizzo is with the Biomedical Department of Internal Medicine and Medical Specialties, University of Palermo, Palermo, Italy. J. Rysz and M. Banach are with the Department of Hypertension, Medical University of Lodz, Lodz, Poland
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Yin FW, Zhou DY, Liu YF, Zhao Q, Zhou X, Song L, Qin L, Qi H, Zhu BW. The Forms of Fluoride in Antarctic Krill ( Euphausia superba) Oil Extracted with Hexane and its Removal with Different Absorbents. JOURNAL OF AQUATIC FOOD PRODUCT TECHNOLOGY 2017. [DOI: 10.1080/10498850.2017.1339756] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Fa-Wen Yin
- School of Food Science and Technology, Dalian Polytechnic University, Dalian, P. R. China
| | - Da-Yong Zhou
- School of Food Science and Technology, Dalian Polytechnic University, Dalian, P. R. China
- National Engineering Research Center of Seafood, Dalian, P. R. China
| | - Yan-Fei Liu
- School of Food Science and Technology, Dalian Polytechnic University, Dalian, P. R. China
| | - Qi Zhao
- School of Food Science and Technology, Dalian Polytechnic University, Dalian, P. R. China
| | - Xin Zhou
- School of Food Science and Technology, Dalian Polytechnic University, Dalian, P. R. China
| | - Liang Song
- School of Food Science and Technology, Dalian Polytechnic University, Dalian, P. R. China
- National Engineering Research Center of Seafood, Dalian, P. R. China
| | - Lei Qin
- School of Food Science and Technology, Dalian Polytechnic University, Dalian, P. R. China
- National Engineering Research Center of Seafood, Dalian, P. R. China
| | - Hang Qi
- School of Food Science and Technology, Dalian Polytechnic University, Dalian, P. R. China
- National Engineering Research Center of Seafood, Dalian, P. R. China
| | - Bei-Wei Zhu
- School of Food Science and Technology, Dalian Polytechnic University, Dalian, P. R. China
- National Engineering Research Center of Seafood, Dalian, P. R. China
- Beijing Advanced Innovation Centre of Food Nutrition and Human Health, China Agricultural University, Beijing, China
- Tianjin Food Safety & Low Carbon Manufacturing Collaborative Innovation Center, Tianjin, P. R. China
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Eicosapentaenoic acid-enriched phospholipids improve atherosclerosis by mediating cholesterol metabolism. J Funct Foods 2017. [DOI: 10.1016/j.jff.2017.02.020] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
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Zhou DY, Liu YX, Xu ZL, Yin FW, Song L, Wan XL, Song YK, Zhu BW. Effects of long-term intake of Antarctic krill oils on artery blood pressure in spontaneously hypertensive rats. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2017; 97:1143-1148. [PMID: 27292941 DOI: 10.1002/jsfa.7840] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2015] [Revised: 04/27/2016] [Accepted: 06/05/2016] [Indexed: 06/06/2023]
Abstract
BACKGROUND In recent years, there has been a noticeable increase in research on krill oil (KO) for its health benefits. However, the action of KO in lowering blood pressure (BP) has not been studied yet. Therefore the aim of this study was to assess the ability of long-term KO supplementation to lower systolic BP (SBP) in spontaneously hypertensive rats (SHRs) and Sprague Dawley (SD) rats. RESULTS Compared with the blank control (BC) SHRs administered edible soybean oil, the high-dose (500 mg kg-1 body weight (BW)) KO-supplemented SHRs in the 2nd, 3rd, 4th and 5th weeks following oral administration, the mid-dose (100 mg kg-1 BW) KO-supplemented SHRs in the 4th and 5th weeks following oral administration and the low-dose (20 mg kg-1 BW) KO-supplemented SHRs in the 5th week following oral administration showed significantly lower SBP (P < 0.05). However, supplementation of KO had no significant effect on the SBP of healthy SD rats. Meanwhile, 5 weeks of KO administration significantly increased the serum levels of nitric oxide (NO) and total NO synthase of SHRs (P < 0.05). CONCLUSION KO has an antihypertensive effect in SHRs that is associated with an NO-related mechanism. © 2016 Society of Chemical Industry.
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Affiliation(s)
- Da-Yong Zhou
- School of Food Science and Technology, Dalian Polytechnic University, Dalian, 116034, China
- National Engineering Research Center of Seafood, Dalian, 116034, China
- Department of Biochemistry, Memorial University of Newfoundland, St John's, A1B 3X9, NL, Canada
| | - Yu-Xin Liu
- School of Food Science and Technology, Dalian Polytechnic University, Dalian, 116034, China
| | - Zhi-Li Xu
- School of Pharmacy, Liaoning University of Traditional Chinese Medicine, Dalian, 116600, China
| | - Fa-Wen Yin
- School of Food Science and Technology, Dalian Polytechnic University, Dalian, 116034, China
| | - Liang Song
- School of Food Science and Technology, Dalian Polytechnic University, Dalian, 116034, China
- National Engineering Research Center of Seafood, Dalian, 116034, China
| | - Xiu-Lin Wan
- School of Food Science and Technology, Dalian Polytechnic University, Dalian, 116034, China
| | - Yu-Kun Song
- School of Food Science and Technology, Dalian Polytechnic University, Dalian, 116034, China
| | - Bei-Wei Zhu
- School of Food Science and Technology, Dalian Polytechnic University, Dalian, 116034, China
- National Engineering Research Center of Seafood, Dalian, 116034, China
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Zhang L, Wang D, Wen M, Du L, Xue C, Wang J, Xu J, Wang Y. Rapid modulation of lipid metabolism in C57BL/6J mice induced by eicosapentaenoic acid-enriched phospholipid from Cucumaria frondosa. J Funct Foods 2017. [DOI: 10.1016/j.jff.2016.10.022] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
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Yin F, Zhou D, Xi M, Zhao Q, Liu Z, Li D, Dong X, Zhu B. Influence of Storage Conditions on the Stability of Phospholipids-Rich Krill (Euphausia superba) Oil. J FOOD PROCESS PRES 2016. [DOI: 10.1111/jfpp.12709] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Fawen Yin
- School of Food Science and Technology; Dalian Polytechnic University; Dalian People's Republic of China
| | - Dayong Zhou
- School of Food Science and Technology; Dalian Polytechnic University; Dalian People's Republic of China
- National Engineering Research Center of Seafood; Dalian People's Republic of China
- Department of Biochemistry; Memorial University of Newfoundland; St. John's Newfoundland Canada
| | - Meizhu Xi
- School of Food Science and Technology; Dalian Polytechnic University; Dalian People's Republic of China
| | - Qi Zhao
- School of Food Science and Technology; Dalian Polytechnic University; Dalian People's Republic of China
- National Engineering Research Center of Seafood; Dalian People's Republic of China
| | - Zhongyuan Liu
- School of Food Science and Technology; Dalian Polytechnic University; Dalian People's Republic of China
| | - Dongmei Li
- School of Food Science and Technology; Dalian Polytechnic University; Dalian People's Republic of China
- National Engineering Research Center of Seafood; Dalian People's Republic of China
| | - Xiuping Dong
- School of Food Science and Technology; Dalian Polytechnic University; Dalian People's Republic of China
- National Engineering Research Center of Seafood; Dalian People's Republic of China
| | - Beiwei Zhu
- School of Food Science and Technology; Dalian Polytechnic University; Dalian People's Republic of China
- National Engineering Research Center of Seafood; Dalian People's Republic of China
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Yang L, Guo J, Yu Y, An Q, Wang L, Li S, Huang X, Mu S, Qi S. Hydrogen bonds of sodium alginate/Antarctic krill protein composite material. Carbohydr Polym 2016; 142:275-81. [PMID: 26917400 DOI: 10.1016/j.carbpol.2016.01.050] [Citation(s) in RCA: 61] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2015] [Revised: 01/04/2016] [Accepted: 01/22/2016] [Indexed: 11/26/2022]
Abstract
Sodium alginate/Antarctic krill protein composite material (SA/AKP) was successfully obtained by blending method. The hydrogen bonds of SA/AKP composite material were analyzed by Fourier transform infrared spectroscopy (FT-IR) and Nuclear magnetic resonance hydrogen spectrum (HNMR). Experiment manifested the existence of intermolecular and intramolecular hydrogen bonds in SA/AKP system; strength of intermolecular hydrogen bond enhanced with the increase of AKP in the composite material and the interaction strength of hydrogen bonding followed the order: OH…Ether O>OH…π>OH…N. The percentage of intermolecular hydrogen bond decreased with increase of pH. At the same time, the effect of hydrogen bonds on properties of the composite material was discussed. The increase of intermolecular hydrogen bonding led to the decrease of crystallinity, increase of apparent viscosity and surface tension, as well as obvious decrease of heat resistance of SA/AKP composite material. SA/AKP fiber SEM images and energy spectrum showed that crystallized salt was separated from the fiber, which possibly led to the fibrillation of the composite fibers.
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Affiliation(s)
- Lijun Yang
- Dalian Polytechnic University, Liaoning 116034, PR China
| | - Jing Guo
- Dalian Polytechnic University, Liaoning 116034, PR China; Liaoning Engineering Technology Research Center of Function Fiber and Its Composites, Dalian Polytechnic University, Dalian 116034, PR China.
| | - Yue Yu
- Dalian Polytechnic University, Liaoning 116034, PR China
| | - Qingda An
- Dalian Polytechnic University, Liaoning 116034, PR China
| | - Liyan Wang
- Shenyang University of Technology, Liaoning 111003, PR China
| | - Shenglin Li
- Dalian Polytechnic University, Liaoning 116034, PR China
| | - Xuelin Huang
- Dalian Polytechnic University, Liaoning 116034, PR China
| | - Siyang Mu
- Dalian Polytechnic University, Liaoning 116034, PR China
| | - Shanwei Qi
- Dalian Polytechnic University, Liaoning 116034, PR China
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Krill oil reduces plasma triacylglycerol level and improves related lipoprotein particle concentration, fatty acid composition and redox status in healthy young adults - a pilot study. Lipids Health Dis 2015; 14:163. [PMID: 26666303 PMCID: PMC4678523 DOI: 10.1186/s12944-015-0162-7] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2015] [Accepted: 11/28/2015] [Indexed: 02/02/2023] Open
Abstract
Background Lipid abnormalities, enhanced inflammation and oxidative stress seem to represent a vicious circle in atherogenesis, and therapeutic options directed against these processes seems like a reasonable approach in the management of atherosclerotic disorders. Krill oil (RIMFROST Sublime®) is a phospholipid-rich oil with eicosapentaenoic acid (EPA): docosahexaenoic acid (DHA) ratio of 1.8:1. In this pilot study we determined if krill oil could favourable affect plasma lipid parameters and parameters involved in the initiation and progression of atherosclerosis. Methods The study was conducted as a 28 days intervention study examining effect-parameters of dietary supplementation with krill oil (832.5 mg EPA and DHA per day). 17 healthy volunteers in the age group 18–36 (mean age 23 ± 4 years) participated. Plasma lipids, lipoprotein particle sizes, fatty acid composition in plasma and red blood cells (RBCs), plasma cytokines, antioxidant capacity, acylcarntines, carnitine, choline, betaine, and trimethylamine-N-oxide (TMAO) were measured before and after supplementation. Results Plasma triacylglycerol (TAG) and large very-low density lipoprotein (VLDL) & chylomicron particle concentrations decreased after 28 days of krill oil intake. A significant reduction in the TAG/HDL cholesterol resulted. Krill oil supplementation decreased n-6/n-3 polyunsaturated fatty acids (PUFA) ratio both in plasma and RBCs. This was due to increased EPA, DHA and docosapentaenoic acid (DPA) and reduced amount of arachidonic acid (AA). The increase of n-3 fatty acids and wt % of EPA and DHA in RBC was of smaller magnitude than found in plasma. Krill oil intake increased the antioxidant capacity, double bond index (DBI) and the fatty acid anti-inflammatory index. The plasma atherogenicity index remained constant whereas the thrombogenicity index decreased. Plasma choline, betaine and the carnitine precursor, γ-butyrobetaine were increased after krill oil supplementation whereas the TMAO and carnitine concentrations remained unchanged. Conclusion Krill oil consumption is considered health beneficial as it decreases cardiovascular disease risk parameters through effects on plasma TAGs, lipoprotein particles, fatty acid profile, redox status and possible inflammation. Noteworthy, no adverse effects on plasma levels of TMAO and carnitine were found.
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Wang Y, Chang Y, Yin L, Xue Y, Li Z, Xue C. A Novel Technological Process of Extracting l-Tyrosine with Low Fluorine Content from Defatted Antarctic Krill (Euphausia superba) By-product by Enzymatic Hydrolysis. FOOD BIOPROCESS TECH 2015. [DOI: 10.1007/s11947-015-1658-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Wang Y, Wang R, Chang Y, Gao Y, Li Z, Xue C. Preparation and thermo-reversible gelling properties of protein isolate from defatted Antarctic krill (Euphausia superba) byproducts. Food Chem 2015; 188:170-6. [DOI: 10.1016/j.foodchem.2015.04.126] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2015] [Revised: 03/06/2015] [Accepted: 04/20/2015] [Indexed: 11/17/2022]
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Ulven SM, Holven KB. Comparison of bioavailability of krill oil versus fish oil and health effect. Vasc Health Risk Manag 2015; 11:511-24. [PMID: 26357480 PMCID: PMC4559234 DOI: 10.2147/vhrm.s85165] [Citation(s) in RCA: 68] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Background The aim of this review is to summarize the effects of krill oil (KO) or fish oil (FO) on eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) incorporation in plasma phospholipids or membrane of red blood cells (RBCs) as shown in human and animal studies. Furthermore, we discuss the findings in relation to the possible different health effects, focusing on lipids, inflammatory markers, cardiovascular disease risk, and biological functions of these two sources of long-chain n-3 polyunsaturated fatty acids (PUFAs). Methods A literature search was conducted in PubMed in January 2015. In total, 113 articles were identified, but based on selection criteria, 14 original papers were included in the review. Results Studies on bioavailability of EPA and DHA from KO and FO in humans and animals are limited and the interpretation is difficult, as different amounts of EPA and DHA have been used, duration of intervention differs, and different study groups have been included. Two human studies – one postprandial study and one intervention study – used the same amount of EPA and DHA from KO or FO, and they both showed that the bioavailability of EPA and DHA from KO seems to be higher than that from FO. Limited effects of KO and FO on lipids and inflammatory markers in human and animal studies were reported. Gene expression data from animal studies showed that FO upregulated the cholesterol synthesis pathway, which was the opposite of the effect mediated by KO. KO also regulated far more metabolic pathways than FO, which may indicate different biological effects of KO and FO. Conclusion There seems to be a difference in bioavailability of EPA and DHA after intake of KO and FO, but more studies are needed before a firm conclusion can be made. It is also necessary to document the beneficial health effects of KO with more human studies and to elucidate if these effects differ from those after regular fish and FO intake.
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Affiliation(s)
- Stine M Ulven
- Department of Health, Nutrition and Management, Faculty of Health Sciences, Oslo and Akershus University College of Applied Sciences, Oslo, Norway
| | - Kirsten B Holven
- Department of Nutrition, Institute for Basic Medical Sciences, University of Oslo, Oslo, Norway
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Skorve J, Hilvo M, Vihervaara T, Burri L, Bohov P, Tillander V, Bjørndal B, Suoniemi M, Laaksonen R, Ekroos K, Berge RK, Alexson SEH. Fish oil and krill oil differentially modify the liver and brain lipidome when fed to mice. Lipids Health Dis 2015; 14:88. [PMID: 26260413 PMCID: PMC4531896 DOI: 10.1186/s12944-015-0086-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2015] [Accepted: 07/24/2015] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Marine food is an important source of omega-3 fatty acids with beneficial health effects. Oils from marine organisms have different fatty acid composition and differ in their molecular composition. Fish oil (FO) has a high content of eicosapentaenoic and docosahexaenoic acids mainly esterified to triacylglycerols, while in krill oil (KO) these fatty acids are mainly esterified to phospholipids. The aim was to study the effects of these oils on the lipid content and fatty acid distribution in the various lipid classes in liver and brain of mice. METHODS Mice were fed either a high-fat diet (HF), a HF diet supplemented with FO or with KO (n = 6). After six weeks of feeding, liver and brain lipid extracts were analysed using a shotgun and TAG lipidomics approach. Student t-test was performed after log-transformation to compare differences between study groups. RESULTS Six weeks of feeding resulted in significant changes in the relative abundance of many lipid classes compared to control mice. In both FO and KO fed mice, the triacylglycerol content in the liver was more than doubled. The fatty acid distribution was affected by the oils in both liver and brain with a decrease in the abundance of 18:2 and 20:4, and an increase in 20:5 and 22:6 in both study groups. 18:2 decreased in all lipid classes in the FO group but with only minor changes in the KO group. Differences between the feeding groups were particularly evident in some of the minor lipid classes that are associated with inflammation and insulin resistance. Ceramides and diacylglycerols were decreased and cholesteryl esters increased in the liver of the KO group, while plasmalogens were decreased in the FO group. In the brain, diacylglycerols were decreased, more by KO than FO, while ceramides and lactosylceramides were increased, more by FO than KO. CONCLUSION The changes in the hepatic sphingolipids and 20:4 fatty acid levels were greater in the KO compared to the FO fed mice, and are consistent with a hypothesis that krill oil will have a stronger anti-inflammatory action and enhances insulin sensitivity more potently than fish oil.
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Affiliation(s)
- Jon Skorve
- Department of Clinical Science, University of Bergen, N-5021, Bergen, Norway.
| | - Mika Hilvo
- Zora Biosciences Oy, Biologinkuja 1, 02150, Espoo, Finland.
| | | | - Lena Burri
- Department of Clinical Science, University of Bergen, N-5021, Bergen, Norway. .,Present address: Aker BioMarine ASA, Fjordalléen 16, NO-0115, Oslo, Norway.
| | - Pavol Bohov
- Department of Clinical Science, University of Bergen, N-5021, Bergen, Norway.
| | - Veronika Tillander
- Division of Clinical Chemistry, Department of Laboratory Medicine, Karolinska Institutet, Karolinska University Hospital, S-14186, Stockholm, Sweden.
| | - Bodil Bjørndal
- Department of Clinical Science, University of Bergen, N-5021, Bergen, Norway.
| | - Matti Suoniemi
- Zora Biosciences Oy, Biologinkuja 1, 02150, Espoo, Finland.
| | | | - Kim Ekroos
- Zora Biosciences Oy, Biologinkuja 1, 02150, Espoo, Finland.
| | - Rolf K Berge
- Department of Clinical Science, University of Bergen, N-5021, Bergen, Norway. .,Department of Heart Disease, Haukeland University Hospital, N-5021, Bergen, Norway.
| | - Stefan E H Alexson
- Division of Clinical Chemistry, Department of Laboratory Medicine, Karolinska Institutet, Karolinska University Hospital, S-14186, Stockholm, Sweden.
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A Phospholipid-Protein Complex from Krill with Antioxidative and Immunomodulating Properties Reduced Plasma Triacylglycerol and Hepatic Lipogenesis in Rats. Mar Drugs 2015; 13:4375-97. [PMID: 26193284 PMCID: PMC4515623 DOI: 10.3390/md13074375] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2015] [Revised: 06/24/2015] [Accepted: 07/01/2015] [Indexed: 12/17/2022] Open
Abstract
Dietary intake of marine omega-3 polyunsaturated fatty acids (n-3 PUFAs) can change the plasma profile from atherogenic to cardioprotective. In addition, there is growing evidence that proteins of marine origin may have health benefits. We investigated a phospholipid-protein complex (PPC) from krill that is hypothesized to influence lipid metabolism, inflammation, and redox status. Male Wistar rats were fed a control diet (2% soy oil, 8% lard, 20% casein), or diets where corresponding amounts of casein and lard were replaced with PPC at 3%, 6%, or 11% (wt %), for four weeks. Dietary supplementation with PPC resulted in significantly lower levels of plasma triacylglycerols in the 11% PPC-fed group, probably due to reduced hepatic lipogenesis. Plasma cholesterol levels were also reduced at the highest dose of PPC. In addition, the plasma and liver content of n-3 PUFAs increased while n-6 PUFAs decreased. This was associated with increased total antioxidant capacity in plasma and increased liver gene expression of mitochondrial superoxide dismutase (Sod2). Finally, a reduced plasma level of the inflammatory mediator interleukin-2 (IL-2) was detected in the PPC-fed animals. The present data show that PPC has lipid-lowering effects in rats, and may modulate risk factors related to cardiovascular disease progression.
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Hirotani Y, Ozaki N, Tsuji Y, Urashima Y, Myotoku M. Effects of eicosapentaenoic acid on hepatic dyslipidemia and oxidative stress in high fat diet-induced steatosis. Int J Food Sci Nutr 2015; 66:569-73. [DOI: 10.3109/09637486.2015.1042848] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Burri L, Johnsen L. Krill products: an overview of animal studies. Nutrients 2015; 7:3300-21. [PMID: 25961320 PMCID: PMC4446753 DOI: 10.3390/nu7053300] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2015] [Revised: 04/29/2015] [Accepted: 05/04/2015] [Indexed: 12/18/2022] Open
Abstract
Many animal studies have been performed with krill oil (KO) and this review aims to summarize their findings and give insight into the mechanism of action of KO. Animal models that have been used in studies with KO include obesity, depression, myocardial infarction, chronic low-grade and ulcerative inflammation and are described in detail. Moreover, studies with KO in the form of krill powder (KP) and krill protein concentrate (KPC) as a mix of lipids and proteins are mentioned and compared to the effects of KO. In addition, differences in tissue uptake of the long-chain omega-3 polyunsaturated fatty acids eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), when delivered in either phospholipid or triglyceride form, are addressed and the differential impact the delivery form has on gene expression profiles is explained. In our outlook, we try to highlight the potential of KO and KP supplementation in clinical settings and discuss health segments that have a high potential of showing krill product specific health benefits and warrant further clinical investigations.
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Affiliation(s)
- Lena Burri
- Aker BioMarine Antarctic AS, Fjordalléen 16, NO-0115 Oslo, Norway.
| | - Line Johnsen
- Aker BioMarine Antarctic AS, Fjordalléen 16, NO-0115 Oslo, Norway.
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Hong MY, Lumibao J, Mistry P, Saleh R, Hoh E. Fish Oil Contaminated with Persistent Organic Pollutants Reduces Antioxidant Capacity and Induces Oxidative Stress without Affecting Its Capacity to Lower Lipid Concentrations and Systemic Inflammation in Rats. J Nutr 2015; 145:939-44. [PMID: 25788582 PMCID: PMC4408738 DOI: 10.3945/jn.114.206607] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2014] [Accepted: 03/02/2015] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Numerous studies have investigated the benefits of fish, fish oil, and ω-3 (n-3) polyunsaturated fatty acids against cardiovascular diseases. However, concern surrounding contamination with persistent organic pollutants (POPs) prompts caution in the recommendation to consume fish and fish oil. OBJECTIVE The present study compared the effects of fish oil contaminated with polychlorinated biphenyls (PCBs) and organochlorine pesticides (OCs) on serum lipid profiles, inflammation, and oxidative stress. METHODS Twenty eight-day-old male Sprague-Dawley rats (n = 30) consumed diets of unmodified fish oil (FO) consisting of 15% fat by weight, persistent organic pollutant-contaminated fish oil (POP FO) (PCBs at 2.40 μg/g; OCs at 3.80 μg/g FO), or corn oil (control; CO) for 9 wk. Lipid profiles and C-reactive protein concentrations were assessed. Hepatic gene expression related to lipid metabolism was determined by real time quantitative polymerase chain reaction analysis. RESULTS After 9 wk of feeding, accumulation of PCBs and OCs in the fat tissue of the POP FO group compared with the other 2 groups was confirmed (P < 0.01). Both fish oil groups showed greater HDL cholesterol (FO 53 ± 5.3 and POP FO 55 ± 7.7 vs. CO 34 ± 2.3 mg/dL), but lower triglycerides (24 ± 2.8 and 22 ± 3.0 vs. 43 ± 5.6 mg/dL), LDL cholesterol (38 ± 14 and 34 ± 9.2 vs. 67 ± 4.4 mg/dL), and C-reactive protein (113 ± 20 and 120 ± 26 vs. 189 ± 22 μg/dL) compared with the CO group (P < 0.05). Gene expression of fatty acid synthase in both fish oil groups was also less than in the CO group (P < 0.05). However, the POP FO group showed greater lipid peroxidation (5.1 ± 0.7 vs. 2.9 ± 0.9 and 2.6 ± 0.6 μM) and less antioxidant capacity (0.08 ± 0.06 vs. 0.5 ± 0.1 and 0.4 ± 0.1 mM) than the CO and FO groups (P < 0.05). CONCLUSIONS These findings indicate that, despite exhibiting benefits on serum lipid concentrations and inflammation, contamination with PCBs and OCs showed significant negative effects on oxidative stress and antioxidant capacity in rats. Future studies should investigate the effects of different contaminant doses and the possibility of a dose-dependent response, a lengthened feeding time, and interactions between contaminant mixtures and oils of varying composition to advise on dietary consumption of fish and fish oil.
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Affiliation(s)
| | - Jan Lumibao
- School of Exercise and Nutritional Sciences, and
| | | | - Rhonda Saleh
- Graduate School of Public Health, San Diego State University, San Diego, CA
| | - Eunha Hoh
- Graduate School of Public Health, San Diego State University, San Diego, CA
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Enos RT, Velázquez KT, McClellan JL, Cranford TL, Walla MD, Murphy EA. Lowering the dietary omega-6: omega-3 does not hinder nonalcoholic fatty-liver disease development in a murine model. Nutr Res 2015; 35:449-59. [PMID: 25934114 DOI: 10.1016/j.nutres.2015.04.003] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2015] [Revised: 04/02/2015] [Accepted: 04/07/2015] [Indexed: 12/17/2022]
Abstract
It is hypothesized that a high dietary n-6:n-3 (eg, 10-20:1) is partly responsible for the rise in obesity and related health ailments. However, no tightly controlled studies using high-fat diets differing in the n-6:n-3 have tested this hypothesis. The aim of the study was to determine the role that the dietary n-6:n-3 plays in non-alcoholic fatty-liver disease (NAFLD) and colitis development. We hypothesized that reducing the dietary n-6:n-3 would hinder the development of NAFLD and colitis. Male C57BL/6 J mice were fed high-fat diets, differing in the n-6:n-3 (1:1, 5:1, 10:1, 20:1), for 20 weeks. Gas chromatography-mass spectrometry was used to analyze the hepatic phospholipid arachidonic acid (AA):eicosapentaenoic acid and AA:docosahexaenoic acid. Hepatic metabolism, inflammatory signaling, macrophage polarization, gene expression of inflammatory mediators, oxidative and endoplasmic reticulum stress, and oxidative capacity were assessed as well as colonic inflammatory signaling, and gene expression of inflammatory mediators and tight-junction proteins. Although reducing the dietary n-6:n-3 lowered the hepatic phospholipid AA:eicosapentaenoic acid and AA:docosahexaenoic acid in a dose-dependent manner and mildly influenced inflammatory signaling, it did not significantly attenuate NAFLD development. Furthermore, the onset of NAFLD was not paired to colitis development or changes in tight-junction protein gene expression. In conclusion, reducing the dietary n-6:n-3 did not attenuate NAFLD progression; nor is it likely that colitis, or gut permeability, plays a role in NAFLD initiation in this model.
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Affiliation(s)
- Reilly T Enos
- Department of Pathology, Microbiology & Immunology, School of Medicine, University of South Carolina, Columbia, SC, 29209, USA
| | - Kandy T Velázquez
- Department of Pathology, Microbiology & Immunology, School of Medicine, University of South Carolina, Columbia, SC, 29209, USA
| | - Jamie L McClellan
- Department of Pathology, Microbiology & Immunology, School of Medicine, University of South Carolina, Columbia, SC, 29209, USA
| | - Taryn L Cranford
- Department of Pathology, Microbiology & Immunology, School of Medicine, University of South Carolina, Columbia, SC, 29209, USA
| | - Michael D Walla
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, SC, 29208, USA
| | - E Angela Murphy
- Department of Pathology, Microbiology & Immunology, School of Medicine, University of South Carolina, Columbia, SC, 29209, USA.
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Dietary umbelliferone attenuates alcohol-induced fatty liver via regulation of PPARα and SREBP-1c in rats. Alcohol 2014; 48:707-15. [PMID: 25262573 DOI: 10.1016/j.alcohol.2014.08.008] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
This study investigated the effects of umbelliferone (UF) on alcoholic fatty liver and its underlying mechanism. Rats were fed a Lieber-DeCarli liquid diet with 36% of calories as alcohol with or without UF (0.05 g/L) for 8 weeks. Pair-fed rats received an isocaloric carbohydrate liquid diet. UF significantly reduced the severity of alcohol-induced body weight loss, hepatic lipid accumulation and droplet formation, and dyslipidemia. UF decreased plasma AST, ALT, and γGTP activity. UF significantly reduced hepatic cytochrome P450 2E1 activities and increased alcohol dehydrogenase and aldehyde dehydrogenase 2 activities compared to the alcohol control group, which resulted in a lower plasma acetaldehyde level in the rats that received UF. Chronic alcohol exposure inhibited hepatic AMPK activation compared to the pair-fed rats, which was reversed by UF supplementation. UF also significantly suppressed the lipogenic gene expression (SREBP-1c, SREBP-2, FAS, CIDEA, and PPARγ) and elevated the fatty acid oxidation gene expression (PPARα, Acsl1, CPT, Acox, and Acaa1a) compared to the alcohol control group, which could lead to inhibition of FAS activity and stimulation of CPT and fatty acid β-oxidation activities in the liver of chronic alcohol-fed rats. These results indicated that UF attenuated alcoholic steatosis through down-regulation of SREBP-1c-mediated lipogenesis and up-regulation of PPARα-mediated fatty acid oxidation. Therefore, UF may provide a promising natural therapeutic strategy against alcoholic fatty liver.
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Salem N, Kuratko CN. A reexamination of krill oil bioavailability studies. Lipids Health Dis 2014; 13:137. [PMID: 25156381 PMCID: PMC4161905 DOI: 10.1186/1476-511x-13-137] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2014] [Accepted: 08/18/2014] [Indexed: 11/10/2022] Open
Abstract
It has proven difficult to compare the bioavailability of krill oil (KO) vs. fish oil (FO) due to several of the characteristics of KO. These include the lower concentration of the active ingredients, eicosapentaenoic acid (EPA, 20:5n-3) and docosahexaenoic acid (DHA, 22:6n3), in KO as well as differences in their ratio relative to FO as well as the red color due to astaxanthin. In addition, the lipid classes in which EPA and DHA are found are quite different with KO containing phospholipid, di- and tri-glycerides as well as non-esterified fatty acid forms and with FO being primarily triglycerides. No human study has yet been performed that matches the dose of EPA and DHA in a randomized, controlled trial with measures of bloodstream EPA and DHA content. However, several claims have been made suggesting greater bioavailability of KO vs. FO. These have largely been based on a statistical argument where a somewhat lower dose of KO has been used to result in a similar bloodstream level of EPA and/or DHA or their total. However, the magnitude of the dosage differential is shown to be too small to be expected to result in differing blood levels of the long chain n-3 PUFAs. Some studies which have claimed to provide equal doses of KO and FO have actually used differing amounts of the two major n-3 fatty acid constituents. It is concluded that there is at present no evidence for greater bioavailability of KO vs. FO and that more carefully controlled human trials must be performed to establish their relative efficacies after chronic administration.
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Affiliation(s)
- Norman Salem
- Nutritional Lipids, DSM Nutritional Products, 6480 Dobbin Road, Columbia, MD 21045, USA.
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Bjørndal B, Strand E, Gjerde J, Bohov P, Svardal A, Diehl BW, Innis SM, Berger A, Berge RK. Phospholipids from herring roe improve plasma lipids and glucose tolerance in healthy, young adults. Lipids Health Dis 2014; 13:82. [PMID: 24886291 PMCID: PMC4038089 DOI: 10.1186/1476-511x-13-82] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2014] [Accepted: 05/10/2014] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Herring roe is an underutilized source of n-3 polyunsaturated fatty acids (PUFAs) for human consumption with high phospholipid (PL) content. Studies have shown that PL may improve bioavailability of n-3 PUFAs. Arctic Nutrition's herring roe product MOPL™30 is a PL: docosahexaenoic acid (DHA)-rich fish oil mixture, with a DHA:eicosapentaenoic acid (EPA) ratio of about 3:1, which is also rich in choline. In this pilot study, we determined if MOPL30 could favorably affect plasma lipid parameters and glucose tolerance in healthy young adults. METHODS Twenty female and one male adults, between 22 and 26 years of age, participated in the study. Participants took encapsulated MOPL30, 2.4 g/d EPA + DHA, for 14 days, and completed a three-day weighed food record before and during the capsule intake. Plasma lipids and their fatty acid (FA) composition, plasma and red blood cell (RBC) phosphatidylcholine (PC) FA composition, acylcarnitines, choline, betaine and insulin were measured before and after supplementation (n = 21), and one and four weeks after discontinuation of supplementation (n = 14). An oral glucose tolerance test was performed before and after supplementation. RESULTS Fasting plasma triacylglycerol and non-esterified fatty acids decreased and HDL-cholesterol increased after 14 days of MOPL30 intake (p < 0.05). The dietary records showed that PUFA intake prior to and during capsule intake was not different. Fasting plasma glucose was unchanged from before to after supplementation. However, during oral glucose tolerance testing, blood glucose at both 10 and 120 min was significantly lower after supplementation with MOPL30 compared to baseline measurements. Plasma free choline and betaine were increased, and the n-6/n-3 polyunsaturated (PUFA) ratio in plasma and RBC PC were decreased post-supplementation. Four weeks after discontinuation of MOPL30, most parameters had returned to baseline, but a delayed effect was observed on n-6 PUFAs. CONCLUSIONS Herring roe rich in PL improved the plasma lipid profile and glycemic control in young adults with an overall healthy lifestyle.
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Affiliation(s)
- Bodil Bjørndal
- Department of Clinical Science, University of Bergen, Bergen N-5020, Norway.
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