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Szrok-Jurga S, Czumaj A, Turyn J, Hebanowska A, Swierczynski J, Sledzinski T, Stelmanska E. The Physiological and Pathological Role of Acyl-CoA Oxidation. Int J Mol Sci 2023; 24:14857. [PMID: 37834305 PMCID: PMC10573383 DOI: 10.3390/ijms241914857] [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: 08/25/2023] [Revised: 09/27/2023] [Accepted: 09/30/2023] [Indexed: 10/15/2023] Open
Abstract
Fatty acid metabolism, including β-oxidation (βOX), plays an important role in human physiology and pathology. βOX is an essential process in the energy metabolism of most human cells. Moreover, βOX is also the source of acetyl-CoA, the substrate for (a) ketone bodies synthesis, (b) cholesterol synthesis, (c) phase II detoxication, (d) protein acetylation, and (d) the synthesis of many other compounds, including N-acetylglutamate-an important regulator of urea synthesis. This review describes the current knowledge on the importance of the mitochondrial and peroxisomal βOX in various organs, including the liver, heart, kidney, lung, gastrointestinal tract, peripheral white blood cells, and other cells. In addition, the diseases associated with a disturbance of fatty acid oxidation (FAO) in the liver, heart, kidney, lung, alimentary tract, and other organs or cells are presented. Special attention was paid to abnormalities of FAO in cancer cells and the diseases caused by mutations in gene-encoding enzymes involved in FAO. Finally, issues related to α- and ω- fatty acid oxidation are discussed.
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Affiliation(s)
- Sylwia Szrok-Jurga
- Department of Biochemistry, Faculty of Medicine, Medical University of Gdansk, 80-211 Gdansk, Poland; (S.S.-J.); (J.T.); (A.H.)
| | - Aleksandra Czumaj
- Department of Pharmaceutical Biochemistry, Faculty of Pharmacy, Medical University of Gdansk, 80-211 Gdansk, Poland;
| | - Jacek Turyn
- Department of Biochemistry, Faculty of Medicine, Medical University of Gdansk, 80-211 Gdansk, Poland; (S.S.-J.); (J.T.); (A.H.)
| | - Areta Hebanowska
- Department of Biochemistry, Faculty of Medicine, Medical University of Gdansk, 80-211 Gdansk, Poland; (S.S.-J.); (J.T.); (A.H.)
| | - Julian Swierczynski
- Institue of Nursing and Medical Rescue, State University of Applied Sciences in Koszalin, 75-582 Koszalin, Poland;
| | - Tomasz Sledzinski
- Department of Pharmaceutical Biochemistry, Faculty of Pharmacy, Medical University of Gdansk, 80-211 Gdansk, Poland;
| | - Ewa Stelmanska
- Department of Biochemistry, Faculty of Medicine, Medical University of Gdansk, 80-211 Gdansk, Poland; (S.S.-J.); (J.T.); (A.H.)
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Zhou X, Meng F, Xiao L, Shen H. CYP19A1 promotes gastric cancer as part of a lipid metabolism-related gene signature related to the response of immunotherapy and prognosis. BMC Med Genomics 2023; 16:228. [PMID: 37784135 PMCID: PMC10544546 DOI: 10.1186/s12920-023-01664-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Accepted: 09/18/2023] [Indexed: 10/04/2023] Open
Abstract
BACKGROUND Increasing evidence suggests that the metabolism of lipids plays a crucial role in the progression of gastric cancer. However, the expression of lipid metabolism-related genes (LMGs) still does not serve as a prognostic biomarker in gastric cancer. METHODS We obtained transcriptome data for 751 LMGs and divided STAD patients into two subtypes based on differences in LMGs expression. Then, we analyzed genetic changes in two subtypes as well as immune features to determine their differences. We also constructed a prognostic risk model related to LMGs for individualized comprehensive evaluations. RESULTS In this study, two lipid metabolic (LM) subtypes were identified anchored in the expression profiles of LMGs. Clinical information, genomic alterations, immune features, and immunotherapy response varied significantly between the two LM subtypes. A risk model based on LMGs was also developed to assess prognosis and distinguish patients with high risk from those at low risk. The prognosis differed significantly between the two risk groups of patients. In STAD patients, the risk score was strongly correlated with genomic alterations and immune profile scores. Also, the risk score was an excellent predictor of immune checkpoint inhibitors (ICIs) response. Anchored in preliminary results derived from the aforementioned bioinformatic analysis, we chose CYP19A1 as our target gene and the expression of CYP19A1 was verified in several common gastric cancer cell lines. Then, we carried out the Western blotting, CCK-8 assay, colony formation assay, wound healing assay, and transwell assay to explore the effects of CYP19A1 on malignant biological behavior, and positive consequences were obtained. CONCLUSIONS In this study, STAD patients were divided into two subtypes based on LMGs expression. It is possible to assess the prognosis of a patient and the response to immunotherapy using the established prognostic risk model. A series of basic laboratory experiments also verified the functional role of CYP19A1 in gastric cancer.
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Affiliation(s)
- Xinyi Zhou
- Nanjing BenQ Medical Center, The Affiliated BenQ Hospital of Nanjing Medical University, NanjingJiangsu Province, 210019, China
| | - Fanyu Meng
- Department of General Surgery, the First Affiliated Hospital of Nanjing Medical University, 300 Guangzhou Road, Nanjing, 210029, Jiangsu, China
| | - Linmei Xiao
- Nanjing BenQ Medical Center, The Affiliated BenQ Hospital of Nanjing Medical University, NanjingJiangsu Province, 210019, China
| | - Hua Shen
- Department of General Surgery, the First Affiliated Hospital of Nanjing Medical University, 300 Guangzhou Road, Nanjing, 210029, Jiangsu, China.
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lncRNA ZFAS1 Promotes HMGCR mRNA Stabilization via Binding U2AF2 to Modulate Pancreatic Carcinoma Lipometabolism. J Immunol Res 2022; 2022:4163198. [PMID: 35846429 PMCID: PMC9286883 DOI: 10.1155/2022/4163198] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Revised: 06/16/2022] [Accepted: 06/21/2022] [Indexed: 11/17/2022] Open
Abstract
Being one of the most lethal malignant tumors worldwide, pancreatic carcinoma (PC) shows strong invasiveness and high mortality. In tumorigenesis and progression, the role played by long-chain noncoding RNAs (lncRNAs) cannot be ignored. This article mainly probes into the function of lncRNA ZFAS1 in PC. ZFAS1 expression in PC and normal counterparts retrieved from the Genotype-Tissue Expression (GTEx) project and The Cancer Genome Atlas (TCGA) database was analysed by GEPIA2. Its expression profile in clinical specimens and human PC cell strains was quantified using qRT-PCR. Measurements of BxPC-3 cell multiplication and invasiveness employed CCK-8, plate clone formation test, and Transwell chamber assay. ZFAS1's impact on lipid content in BxPC-3 cells was detected. RNA pulldown and RIP assays analyzed the interaction of ZFAS1 with U2AF2 and HMGCR in BxPC-3 cells. Finally, the impacts of U2AF2 and HMGCR on the biological behavior of BxPC-3 were observed. ZFAS1 was kept at a high level in PC tissues versus the normal counterparts. ZFAS1 gene knockout remarkably suppressed PC cell multiplication and invasiveness and decreased the contents of free fatty acids, total cholesterol, triglycerides, and phospholipids. Mechanistically, ZFAS1 stabilized HMGCR mRNA through U2AF2, thus increasing HMGCR expression and promoting PC lipid accumulation. Meanwhile, reduced PC cell viability and invasiveness were observed after downregulating U2AF2 and HMGCR. As an oncogene of PC, ZFAS1 can modulate lipometabolism and stabilize HMGCR mRNA expression by binding with U2AF2 in PC, which is a candidate target for PC diagnosis and treatment.
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Reis LG, da Silva TH, Salles MSV, Andrade AFC, Martins SMMK, Takeuchi PL, Vidal AMC, Netto AS. Effect of cow’s milk with different PUFA n-6: n-3 ratios on performance, serum lipid profile, and blood parameters of grower gilts. PLoS One 2022; 17:e0258629. [PMID: 35617293 PMCID: PMC9135250 DOI: 10.1371/journal.pone.0258629] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Accepted: 05/10/2022] [Indexed: 11/23/2022] Open
Abstract
The concern with human health has increased the interest in producing foods enriched with polyunsaturated fatty acids (PUFA), directly or naturally, by inclusion in the animals’ diet. The positive effects such as antithrombotic, anti-inflammatory, and hypolipidemic have been observed in pigs and rats, used as human models for study. The present study evaluated the effect of cow’s milk with different lipid profiles on performance, serum fatty acid profile, biochemical analysis, and a complete blood count of gilts used as a human model. At 34 days, thirty gilts were equally distributed in three treatments. Experimental treatments were milk from cows without the oil supplementation (C), milk from cows fed an enriched diet with linseed oil (n-3), and milk from cows fed an enriched diet with soybean oil (n-6). Milk supplementation was performed until 190 days old, provided once in the morning. The n-3 and n-6 milk reduced the concentration of myristic acid in the blood and increased the leukocytes. Milk enriched with n-3 compared to n-6 reduced the stearic acid. In conclusion, milk with a better PUFA profile can reduce saturated fatty acids in the blood and alter the concentration of cells in the defense system.
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Affiliation(s)
- Leriana Garcia Reis
- Department of Animal Science, School of Animal Science and Food Engineering, University of São Paulo, Rua Duque de Caxias Norte, Pirassununga, SP, Brazil
| | - Thiago Henrique da Silva
- Department of Animal Science, School of Animal Science and Food Engineering, University of São Paulo, Rua Duque de Caxias Norte, Pirassununga, SP, Brazil
| | | | - André Furugen Cesar Andrade
- Department of Animal Reproduction, School of Veterinary and Animal Science, University of São Paulo, Avenida Duque de Caxias Norte, Pirassununga, Brazil
| | - Simone Maria Massami Kitamura Martins
- Department of Animal Science, School of Animal Science and Food Engineering, University of São Paulo, Rua Duque de Caxias Norte, Pirassununga, SP, Brazil
| | - Paula Lumy Takeuchi
- Department of Internal Medicine, School of Medicine of Ribeirão Preto, University of São Paulo, Avenida Bandeirantes, Ribeirão Preto, Brazil
| | - Ana Maria Centola Vidal
- Department of Veterinary Medicine, School of Animal Science and Food Engineering, University of São Paulo, Rua Duque de Caxias Norte, Pirassununga, SP, Brazil
| | - Arlindo Saran Netto
- Department of Animal Science, School of Animal Science and Food Engineering, University of São Paulo, Rua Duque de Caxias Norte, Pirassununga, SP, Brazil
- * E-mail:
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Gao Z, Zhang J, Li F, Zheng J, Xu G. Effect of Oils in Feed on the Production Performance and Egg Quality of Laying Hens. Animals (Basel) 2021; 11:3482. [PMID: 34944258 PMCID: PMC8698086 DOI: 10.3390/ani11123482] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Revised: 11/30/2021] [Accepted: 12/05/2021] [Indexed: 12/13/2022] Open
Abstract
With the development of a large-scale and intensive production industry, the number of laying hens in China is rapidly increasing. Oils, as an important source of essential fatty acids, can be added to the diet to effectively improve the production performance and absorption of other nutrients. The present review discusses the practical application of different types and qualities of oils in poultry diets and studies the critical effects of these oils on production performance, such as the egg weight, feed intake, feed conversion ratio (FCR), and various egg quality parameters, including the albumen height, Haugh units, yolk color, and saturated/unsaturated fatty acids. This article reviews the effects of different dietary oil sources on the production performance and egg quality of laying hens and their potential functional mechanisms and provides a reference for the selection of different sources of oils to include in the diet with the aim of improving egg production. This review thus provides a reference for the application of oils to the diets of laying hens. Future studies are needed to determine how poultry products can be produced with the appropriate proper oils in the diet and without negative effects on production performance and egg quality.
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Affiliation(s)
- Zhouyang Gao
- Key Laboratory of Animal Genetics and Breeding of the Ministry of Agriculture, National Engineering Laboratory for Animal Breeding, Department of Animal Genetics and Breeding, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China; (Z.G.); (J.Z.)
| | - Junnan Zhang
- Key Laboratory of Animal Genetics and Breeding of the Ministry of Agriculture, National Engineering Laboratory for Animal Breeding, Department of Animal Genetics and Breeding, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China; (Z.G.); (J.Z.)
| | - Fuwei Li
- Poultry Institute, Shandong Academy of Agricultural Sciences, Jinan 250100, China;
| | - Jiangxia Zheng
- Key Laboratory of Animal Genetics and Breeding of the Ministry of Agriculture, National Engineering Laboratory for Animal Breeding, Department of Animal Genetics and Breeding, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China; (Z.G.); (J.Z.)
| | - Guiyun Xu
- Key Laboratory of Animal Genetics and Breeding of the Ministry of Agriculture, National Engineering Laboratory for Animal Breeding, Department of Animal Genetics and Breeding, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China; (Z.G.); (J.Z.)
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Ye Y, Chen Z, Shen Y, Qin Y, Wang H. Development and validation of a four-lipid metabolism gene signature for diagnosis of pancreatic cancer. FEBS Open Bio 2021; 11:3153-3170. [PMID: 33386701 PMCID: PMC8564347 DOI: 10.1002/2211-5463.13074] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2020] [Revised: 12/17/2020] [Accepted: 12/30/2020] [Indexed: 11/11/2022] Open
Abstract
Abnormal lipid metabolism is closely related to the malignant biological behavior of tumor cells. Such abnormal lipid metabolism provides energy for rapid proliferation, and certain genes related to lipid metabolism encode important components of tumor signaling pathways. In this study, we analyzed pancreatic cancer datasets from The Cancer Genome Atlas and searched for prognostic genes related to lipid metabolism in the Molecular Signature Database. A risk score model was built and verified using the GSE57495 dataset and International Cancer Genome Consortium dataset. Four molecular subtypes and 4249 differentially expressed genes (DEGs) were identified. The DEGs obtained by Weighted Gene Coexpression Network Construction analysis were intersected with 4249 DEGs to obtain a total of 1340 DEGs. The final prognosis model included CA8, CEP55, GNB3 and SGSM2, and these had a significant effect on overall survival. The area under the curve at 1, 3 and 5 years was 0.72, 0.79 and 0.87, respectively. These same results were obtained using the validation cohort. Survival analysis data showed that the model could stratify the prognosis of patients with different clinical characteristics, and the model has clinical independence. Functional analysis indicated that the model is associated with multiple cancer-related pathways. Compared with published models, our model has a higher C-index and greater risk value. In summary, this four-gene signature is an independent risk factor for pancreatic cancer survival and may be an effective prognostic indicator.
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Affiliation(s)
- Yanrong Ye
- Department of PharmacyZhongshan HospitalFudan UniversityShanghaiChina
- Department of PharmacyXiamen BranchZhongshan HospitalFudan UniversityXiamenChina
| | - Zhe Chen
- Department of PharmacyZhongshan HospitalFudan UniversityShanghaiChina
| | - Yun Shen
- Department of PharmacyZhongshan HospitalFudan UniversityShanghaiChina
| | - Yan Qin
- Department of PharmacyZhongshan HospitalFudan UniversityShanghaiChina
| | - Hao Wang
- Teaching Center of Experimental MedicineShanghai Medical CollegeFudan UniversityShanghaiChina
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7
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Katan T, Xue X, Caballero-Solares A, Taylor RG, Parrish CC, Rise ML. Influence of Varying Dietary ω6 to ω3 Fatty Acid Ratios on the Hepatic Transcriptome, and Association with Phenotypic Traits (Growth, Somatic Indices, and Tissue Lipid Composition), in Atlantic Salmon ( Salmo salar). BIOLOGY 2021; 10:biology10070578. [PMID: 34202562 PMCID: PMC8301090 DOI: 10.3390/biology10070578] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Revised: 06/18/2021] [Accepted: 06/21/2021] [Indexed: 11/24/2022]
Abstract
Simple Summary Plant oils are routinely used in fish feeds as a fish oil replacement. However, these terrestrial alternatives typically contain high levels of ω6 fatty acids (FA) and, thus, high ω6 to ω3 (ω6:ω3) FA ratios, which influence farmed fish and their consumers. The ω6:ω3 ratio is known to affect many biological processes (e.g., inflammation, FA metabolism) and human diseases; however, its impacts on fish physiology and the underlying molecular mechanisms are less well understood. In this study, we used 44 K microarrays to examine which genes and molecular pathways are altered by variation in dietary ω6:ω3 in Atlantic salmon. Our microarray study showed that several genes related to immune response, lipid metabolism, cell proliferation, and translation were differentially expressed between the two extreme ω6:ω3 dietary treatments. We also revealed that the PPARα activation-related transcript helz2 is a potential novel molecular biomarker of tissue variation in ω6:ω3. Further, correlation analyses illustrated the relationships between liver transcript expression and tissue (liver, muscle) lipid composition, and other phenotypic traits in salmon fed low levels of fish oil. This nutrigenomic study enhanced the current understanding of Atlantic salmon gene expression response to varying dietary ω6:ω3. Abstract The importance of dietary omega-6 to omega-3 (ω6:ω3) fatty acid (FA) ratios for human health has been extensively examined. However, its impact on fish physiology, and the underlying molecular mechanisms, are less well understood. This study investigated the influence of plant-based diets (12-week exposure) with varying ω6:ω3 (0.4–2.7) on the hepatic transcriptome of Atlantic salmon. Using 44 K microarray analysis, genes involved in immune and inflammatory response (lect2a, itgb5, helz2a, p43), lipid metabolism (helz2a), cell proliferation (htra1b), control of muscle and neuronal development (mef2d) and translation (eif2a, eif4b1, p43) were identified; these were differentially expressed between the two extreme ω6:ω3 dietary treatments (high ω6 vs. high ω3) at week 12. Eight out of 10 microarray-identified transcripts showed an agreement in the direction of expression fold-change between the microarray and qPCR studies. The PPARα activation-related transcript helz2a was confirmed by qPCR to be down-regulated by high ω6 diet compared with high ω3 diet. The transcript expression of two helz2 paralogues was positively correlated with ω3, and negatively with ω6 FA in both liver and muscle, thus indicating their potential as biomarkers of tissue ω6:ω3 variation. Mef2d expression in liver was suppressed in the high ω6 compared to the balanced diet (ω6:ω3 of 2.7 and 0.9, respectively) fed fish, and showed negative correlations with ω6:ω3 in both tissues. The hepatic expression of two lect2 paralogues was negatively correlated with viscerosomatic index, while htra1b correlated negatively with salmon weight gain and condition factor. Finally, p43 and eif2a were positively correlated with liver Σω3, while these transcripts and eif4b2 showed negative correlations with 18:2ω6 in the liver. This suggested that some aspects of protein synthesis were influenced by dietary ω6:ω3. In summary, this nutrigenomic study identified hepatic transcripts responsive to dietary variation in ω6:ω3, and relationships of transcript expression with tissue (liver, muscle) lipid composition and other phenotypic traits.
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Affiliation(s)
- Tomer Katan
- Department of Ocean Sciences, Memorial University of Newfoundland, St. John’s, NL A1C 5S7, Canada; (X.X.); (C.C.P.); (M.L.R.)
- Correspondence: (T.K.); (A.C.-S.); Tel.: +1-709-7703846 (T.K.); Tel.: +1-709-3251598 (A.C.-S.)
| | - Xi Xue
- Department of Ocean Sciences, Memorial University of Newfoundland, St. John’s, NL A1C 5S7, Canada; (X.X.); (C.C.P.); (M.L.R.)
| | - Albert Caballero-Solares
- Department of Ocean Sciences, Memorial University of Newfoundland, St. John’s, NL A1C 5S7, Canada; (X.X.); (C.C.P.); (M.L.R.)
- Correspondence: (T.K.); (A.C.-S.); Tel.: +1-709-7703846 (T.K.); Tel.: +1-709-3251598 (A.C.-S.)
| | - Richard G. Taylor
- Cargill Animal Nutrition, 10383 165th Avenue NW, Elk River, MN 55330, USA;
| | - Christopher C. Parrish
- Department of Ocean Sciences, Memorial University of Newfoundland, St. John’s, NL A1C 5S7, Canada; (X.X.); (C.C.P.); (M.L.R.)
| | - Matthew L. Rise
- Department of Ocean Sciences, Memorial University of Newfoundland, St. John’s, NL A1C 5S7, Canada; (X.X.); (C.C.P.); (M.L.R.)
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Ripon MAR, Bhowmik DR, Amin MT, Hossain MS. Role of arachidonic cascade in COVID-19 infection: A review. Prostaglandins Other Lipid Mediat 2021; 154:106539. [PMID: 33592322 PMCID: PMC7882227 DOI: 10.1016/j.prostaglandins.2021.106539] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 02/01/2021] [Accepted: 02/08/2021] [Indexed: 02/06/2023]
Abstract
The World Health Organization has described the 2019 Coronavirus disease caused by an influenza-like virus called SARS-CoV-2 as a pandemic. Millions of people worldwide are already infected by this virus, and severe infection causes hyper inflammation, thus disrupting lung function, exacerbating breath difficulties, and death. Various inflammatory mediators bio-synthesized through the arachidonic acid pathway play roles in developing cytokine storms, injuring virus-infected cells. Since pro-inflammatory eicosanoids, including prostaglandins, and leukotrienes, are key brokers for physiological processes such as inflammation, fever, allergy, and pain but, their function in COVID-19 is not well defined. This study addresses eicosanoid's crucial role through the arachidonic pathway in inflammatory cascading and recommends using bioactive lipids, NSAIDs, steroids, cell phospholipase A2 (cPLA2) inhibitors, and specialized pro-resolving mediators (SPMs) to treat COVID-19 disease. The role of soluble epoxide hydrolase inhibitors (SEHIs) in promoting the activity of epoxyeicosatrienoic acids (EETs) and 17-hydroxide-docosahexaenoic acid (17-HDHA) is also discussed. Additional research that assesses the eicosanoid profile in COVID-19 patients or preclinical models generates novel insights into coronavirus-host interaction and inflammation regulation.
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Affiliation(s)
- Md Abdur Rahman Ripon
- Department of Pharmacy, Noakhali Science and Technology University, Noakhali 3814, Bangladesh
| | - Dipty Rani Bhowmik
- Department of Pharmacy, Noakhali Science and Technology University, Noakhali 3814, Bangladesh
| | - Mohammad Tohidul Amin
- Department of Pharmacy, Noakhali Science and Technology University, Noakhali 3814, Bangladesh
| | - Mohammad Salim Hossain
- Department of Pharmacy, Noakhali Science and Technology University, Noakhali 3814, Bangladesh.
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Turolo S, Edefonti A, Mazzocchi A, Syren ML, Morello W, Agostoni C, Montini G. Role of Arachidonic Acid and Its Metabolites in the Biological and Clinical Manifestations of Idiopathic Nephrotic Syndrome. Int J Mol Sci 2021; 22:5452. [PMID: 34064238 PMCID: PMC8196840 DOI: 10.3390/ijms22115452] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2021] [Revised: 05/17/2021] [Accepted: 05/18/2021] [Indexed: 11/17/2022] Open
Abstract
Studies concerning the role of arachidonic acid (AA) and its metabolites in kidney disease are scarce, and this applies in particular to idiopathic nephrotic syndrome (INS). INS is one of the most frequent glomerular diseases in childhood; it is characterized by T-lymphocyte dysfunction, alterations of pro- and anti-coagulant factor levels, and increased platelet count and aggregation, leading to thrombophilia. AA and its metabolites are involved in several biological processes. Herein, we describe the main fields where they may play a significant role, particularly as it pertains to their effects on the kidney and the mechanisms underlying INS. AA and its metabolites influence cell membrane fluidity and permeability, modulate platelet activity and coagulation, regulate lymphocyte activity and inflammation, preserve the permeability of the glomerular barrier, influence podocyte physiology, and play a role in renal fibrosis. We also provide suggestions regarding dietary measures that are able to prevent an imbalance between arachidonic acid and its parental compound linoleic acid, in order to counteract the inflammatory state which characterizes numerous kidney diseases. On this basis, studies of AA in kidney disease appear as an important field to explore, with possible relevant results at the biological, dietary, and pharmacological level, in the final perspective for AA to modulate INS clinical manifestations.
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Affiliation(s)
- Stefano Turolo
- Fondazione IRCCS Ca’ Granda-Ospedale Maggiore Policlinico, Pediatric Nephrology, Dialysis and Transplant Unit, Via della Commenda 9, 20122 Milan, Italy; (A.E.); (W.M.); (G.M.)
| | - Alberto Edefonti
- Fondazione IRCCS Ca’ Granda-Ospedale Maggiore Policlinico, Pediatric Nephrology, Dialysis and Transplant Unit, Via della Commenda 9, 20122 Milan, Italy; (A.E.); (W.M.); (G.M.)
| | - Alessandra Mazzocchi
- Department of Clinical Sciences and Community Health, University of Milan, 20122 Milan, Italy; (A.M.); (M.L.S.); (C.A.)
| | - Marie Louise Syren
- Department of Clinical Sciences and Community Health, University of Milan, 20122 Milan, Italy; (A.M.); (M.L.S.); (C.A.)
| | - William Morello
- Fondazione IRCCS Ca’ Granda-Ospedale Maggiore Policlinico, Pediatric Nephrology, Dialysis and Transplant Unit, Via della Commenda 9, 20122 Milan, Italy; (A.E.); (W.M.); (G.M.)
| | - Carlo Agostoni
- Department of Clinical Sciences and Community Health, University of Milan, 20122 Milan, Italy; (A.M.); (M.L.S.); (C.A.)
- Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico, Pediatric Intermediate Care Unit, 20122 Milan, Italy
| | - Giovanni Montini
- Fondazione IRCCS Ca’ Granda-Ospedale Maggiore Policlinico, Pediatric Nephrology, Dialysis and Transplant Unit, Via della Commenda 9, 20122 Milan, Italy; (A.E.); (W.M.); (G.M.)
- Department of Clinical Sciences and Community Health, University of Milan, 20122 Milan, Italy; (A.M.); (M.L.S.); (C.A.)
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10
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Heslin C, Boehm D, Gilmore BF, Megaw J, Freeman TA, Hickok NJ, Cullen PJ, Bourke P. Biomolecules as Model Indicators of In Vitro and In Vivo Cold Plasma Safety. FRONTIERS IN PHYSICS 2021; 8:613046. [PMID: 37124146 PMCID: PMC10136044 DOI: 10.3389/fphy.2020.613046] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
The potential applications for cold plasma in medicine are extensive, from microbial inactivation and induction of apoptosis in cancer cells to stimulating wound healing and enhancing the blood coagulation cascade. The safe bio-medical application of cold plasma and subsequent effect on complex biological pathways requires precision and a distinct understanding of how physiological redox chemistry is manipulated. Chemical modification of biomolecules such as carbohydrates, proteins, and lipids treated with cold plasma have been characterized, however, the context of how alterations of these molecules affect cell behavior or in vivo functionality has not been determined. Thus, this study examines the cytotoxic and mutagenic effects of plasma-treated molecules in vitro using CHO-K1 cells and in vivo in Galleria mellonella larvae. Specifically, albumin, glucose, cholesterol, and arachidonic acid were chosen as representative biomolecules, with established involvement in diverse bioprocesses including; cellular respiration, intracellular transport, cell signaling or membrane structure. Long- and short-term effects depended strongly on the molecule type and the treatment milieu indicating the impact of chemical and physical modifications on downstream biological pathways. Importantly, absence of short-term toxicity did not always correlate with absence of longer-term effects, indicating the need to comprehensively assess ongoing effects for diverse biological applications.
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Affiliation(s)
- Caitlin Heslin
- School of Food Science and Environmental Health, Technological University Dublin, Dublin, Ireland
| | - Daniela Boehm
- School of Food Science and Environmental Health, Technological University Dublin, Dublin, Ireland
| | | | - Julianne Megaw
- School of Pharmacy, Queens University Belfast, Belfast, United Kingdom
| | - Theresa A. Freeman
- Department of Orthopaedic Surgery, Sidney Kimmel Medical College, Jefferson University, Philadelphia, PA, United States
| | - Noreen J. Hickok
- Department of Orthopaedic Surgery, Sidney Kimmel Medical College, Jefferson University, Philadelphia, PA, United States
| | - P. J. Cullen
- School of Food Science and Environmental Health, Technological University Dublin, Dublin, Ireland
- School of Chemical and Biomolecular Engineering, University of Sydney, Sydney, NSW, Australia
| | - Paula Bourke
- School of Food Science and Environmental Health, Technological University Dublin, Dublin, Ireland
- School of Biological Sciences, Queens University Belfast, Belfast, United Kingdom
- Plasma Research Group, School of Biosystems and Food Engineering, University College Dublin, Dublin, Ireland
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11
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Akita H, Takahashi H, Asukai K, Tomokuni A, Wada H, Marukawa S, Yamasaki T, Yanagimoto Y, Takahashi Y, Sugimura K, Yamamoto K, Nishimura J, Yasui M, Omori T, Miyata H, Ochi A, Kagawa A, Soh Y, Taniguchi Y, Ohue M, Yano M, Sakon M. The utility of nutritional supportive care with an eicosapentaenoic acid (EPA)-enriched nutrition agent during pre-operative chemoradiotherapy for pancreatic cancer: Prospective randomized control study. Clin Nutr ESPEN 2019; 33:148-153. [PMID: 31451252 DOI: 10.1016/j.clnesp.2019.06.003] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Revised: 03/10/2019] [Accepted: 06/03/2019] [Indexed: 12/11/2022]
Abstract
BACKGROUND & AIMS Neoadjuvant chemoradiotherapy (NACRT) for pancreatic cancer (PC) is potentially associated with various toxicities, which can lead to impaired nutritional status. Eicosapentaenoic acid (EPA) can reduce proinflammatory cytokines and positively influence cancer cachexia syndrome. The aim of this study is to clarify the utility of EPA enriched nutrition support during NACRT for PC. METHODS We randomly assigned 62 patients with PC that received NACRT to either a nutrition intervention (NI) or a normal diet (ND). Patients in the NI group received 2 bottles/day (550 kcal/day) of an EPA-enriched nutrition supplement during NACRT. The primary endpoints were the before-to-after NACRT ratios (post/pre ratios) of skeletal muscle mass and psoas major muscle area (PMA). The secondary endpoints were the post/pre ratios of other nutritional parameters and treatment-related toxicities. RESULTS Only 14 patients (45.2%) in the NI group consumed more than 50% of the EPA-enriched supplement provided. The post/pre ratio of skeletal muscle mass in the NI group (0.99 ± 0.060) was not significantly different from that of the ND group (0.96 ± 0.079, p = 0.102). However, patients that consumed ≥50% of the EPA-enriched supplement (the good intake group) had significantly higher skeletal muscle mass ratios than patients in the ND group (p = 0.042). The PMA ratio was significantly higher in the NI group (0.96 ± 0.081) than in the ND group (0.89 ± 0.072, p = 0.001). The NI and ND groups were not significantly different in other nutritional parameters or in NACRT-related toxicity. CONCLUSIONS We found that EPA-enriched intake could potentially improve the nutritional status of patients with PC that received NACRT, but it was difficult for many patients to drink, due to its disagreeable taste. University Hospital Medical Information Network (http://www.umin.ac.jp), registration number UMIN000033589, https://upload.umin.ac.jp/cgi-bin/ctr_e/ctr_view.cgi?recptno=R000038300.
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Affiliation(s)
- Hirofumi Akita
- Department of Surgery, Osaka International Cancer Institute, Japan; Department of Gastroenterological Surgery, Osaka University Graduate School of Medicine, Japan.
| | | | - Kei Asukai
- Department of Surgery, Osaka International Cancer Institute, Japan
| | - Akira Tomokuni
- Department of Surgery, Osaka International Cancer Institute, Japan
| | - Hiroshi Wada
- Department of Surgery, Osaka International Cancer Institute, Japan
| | - Satoko Marukawa
- Department of Endocrinology and Metabolism, Osaka International Cancer Institute, Japan
| | - Tomoyuki Yamasaki
- Department of Endocrinology and Metabolism, Osaka International Cancer Institute, Japan
| | | | - Yusuke Takahashi
- Department of Surgery, Osaka International Cancer Institute, Japan
| | - Keijiro Sugimura
- Department of Surgery, Osaka International Cancer Institute, Japan
| | | | | | - Masayoshi Yasui
- Department of Surgery, Osaka International Cancer Institute, Japan
| | - Takeshi Omori
- Department of Surgery, Osaka International Cancer Institute, Japan
| | - Hiroshi Miyata
- Department of Surgery, Osaka International Cancer Institute, Japan
| | - Ayami Ochi
- Department of Nursing, Osaka International Cancer Institute, Japan
| | - Ayano Kagawa
- Department of Nursing, Osaka International Cancer Institute, Japan
| | - Yuko Soh
- Department of Nutrition, Osaka International Cancer Institute, Japan
| | - Yuko Taniguchi
- Department of Nutrition, Osaka International Cancer Institute, Japan
| | - Masayuki Ohue
- Department of Surgery, Osaka International Cancer Institute, Japan
| | - Masahiko Yano
- Department of Surgery, Osaka International Cancer Institute, Japan
| | - Masato Sakon
- Department of Surgery, Osaka International Cancer Institute, Japan
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12
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Gonçalves NB, Bannitz RF, Silva BR, Becari DD, Poloni C, Gomes PM, Foss MC, Foss-Freitas MC. α-Linolenic acid prevents hepatic steatosis and improves glucose tolerance in mice fed a high-fat diet. Clinics (Sao Paulo) 2018; 73:e150. [PMID: 30379219 PMCID: PMC6201146 DOI: 10.6061/clinics/2018/e150] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/23/2018] [Accepted: 05/28/2018] [Indexed: 12/24/2022] Open
Abstract
OBJECTIVES Dietary omega-3 fatty acids have been efficacious in decreasing serum cholesterol levels and reducing the risk of cardiovascular disease. However, the metabolic and molecular changes induced by the omega-3 fatty acid α-linolenic acid (ALA), which is found in linseed oil, are not fully understood. In this study, we showed a correlation between ALA and insulin resistance, inflammation and endoplasmic reticulum stress (ERS). METHODS We studied 40 male mice (C57/BL6) divided into 4 groups: a control (C) group, a control + omega-3/ALA (CA) group, a high-fat diet (HFD) (H) group and a high-fat diet + omega-3/ALA (HA) group. For 8 weeks, the animals in the H and HA groups were fed a high-fat (60%) diet, while the animals in the C and CA groups received regular chow. The diets of the CA and HA groups were supplemented with 10% lyophilized ALA. RESULTS ALA supplementation improved glucose tolerance and reduced insulin resistance, as measured by intraperitoneal glucose tolerance tests and the homeostasis model assessment for insulin resistance, respectively. In addition, ALA reduced hepatic steatosis and modified the standard fat concentration in the liver of animals fed an HFD. Dietary ALA supplementation reduced the serum levels of interleukin 6 (IL-6), interleukin 1 beta (IL-1β) and monocyte chemoattractant protein-1 (MCP-1), increased the expression of important chaperones such as binding immunoglobulin protein (BIP) and heat shock protein 70 (HSP70) and reduced the expression of C/EBP-homologous protein (CHOP) and X-box binding protein 1 (XBP1) in hepatic tissues, suggesting an ERS adaptation in response to ALA supplementation. CONCLUSIONS Dietary ALA supplementation is effective in preventing hepatic steatosis; is associated with a reduction in insulin resistance, inflammation and ERS; and represents an alternative for improving liver function and obtaining metabolic benefits.
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Affiliation(s)
- Natália Bonissi Gonçalves
- Departamento de Medicina, Divisao de Endocrinologia e Metabolismo, Faculdade de Medicina de Ribeirao Preto, Universidade de Sao Paulo, Ribeirao Preto, SP, BR
- *Corresponding author. E-mail:
| | - Rafael Ferraz Bannitz
- Departamento de Medicina, Divisao de Endocrinologia e Metabolismo, Faculdade de Medicina de Ribeirao Preto, Universidade de Sao Paulo, Ribeirao Preto, SP, BR
- *Corresponding author. E-mail:
| | - Bruna Ramos Silva
- Departamento de Medicina, Divisao de Endocrinologia e Metabolismo, Faculdade de Medicina de Ribeirao Preto, Universidade de Sao Paulo, Ribeirao Preto, SP, BR
| | - Danielle Duran Becari
- Departamento de Medicina, Divisao de Endocrinologia e Metabolismo, Faculdade de Medicina de Ribeirao Preto, Universidade de Sao Paulo, Ribeirao Preto, SP, BR
| | - Carolina Poloni
- Departamento de Medicina, Divisao de Endocrinologia e Metabolismo, Faculdade de Medicina de Ribeirao Preto, Universidade de Sao Paulo, Ribeirao Preto, SP, BR
| | - Patrícia Moreira Gomes
- Departamento de Medicina, Divisao de Endocrinologia e Metabolismo, Faculdade de Medicina de Ribeirao Preto, Universidade de Sao Paulo, Ribeirao Preto, SP, BR
| | - Milton Cesar Foss
- Departamento de Medicina, Divisao de Endocrinologia e Metabolismo, Faculdade de Medicina de Ribeirao Preto, Universidade de Sao Paulo, Ribeirao Preto, SP, BR
| | - Maria Cristina Foss-Freitas
- Departamento de Medicina, Divisao de Endocrinologia e Metabolismo, Faculdade de Medicina de Ribeirao Preto, Universidade de Sao Paulo, Ribeirao Preto, SP, BR
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13
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Huang R, Xue X, Li S, Wang Y, Sun Y, Liu W, Yin H, Tao T. Alterations of polyunsaturated fatty acid metabolism in ovarian tissues of polycystic ovary syndrome rats. J Cell Mol Med 2018; 22:3388-3396. [PMID: 29602230 PMCID: PMC6010729 DOI: 10.1111/jcmm.13614] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2017] [Accepted: 02/09/2018] [Indexed: 01/25/2023] Open
Abstract
The metabolism of polyunsaturated fatty acids (PUFAs) remains poorly characterized in ovarian tissues of patients with polycystic ovary syndrome (PCOS). This study aimed to explore alterations in the levels of PUFAs and their metabolites in serum and ovarian tissues in a PCOS rat model treated with a high‐fat diet and andronate. Levels of PUFAs and their metabolites were measured using gas/liquid chromatography‐mass spectrometry after the establishment of a PCOS rat model. Only 3 kinds of PUFAs [linoleic acid, arachidonic acid (AA) and docosahexaenoic acid] were detected in both the circulation and ovarian tissues of the rats, and their concentrations were lower in ovarian tissues than in serum. Moreover, significant differences in the ovarian levels of AA were observed between control, high‐fat diet‐fed and PCOS rats. The levels of prostaglandins, AA metabolites via the cyclooxygenase (COX) pathway, in ovarian tissues of the PCOS group were significantly increased compared to those in the controls. Further studies on the mechanism underlying this phenomenon showed a correlation between decreased expression of phosphorylated cytosolic phospholipase A2 (p‐cPLA2) and increased mRNA and protein expression of COX2, potentially leading to a deeper understanding of altered AA and prostaglandin levels in ovarian tissues of PCOS rats.
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Affiliation(s)
- Rong Huang
- Department of Endocrinology and Metabolism, RenJi Hospital, School of Medicine, Shanghai JiaoTong University, Shanghai, China
| | - Xinli Xue
- Key Laboratory of Food Safety Research, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Shengxian Li
- Department of Endocrinology and Metabolism, RenJi Hospital, School of Medicine, Shanghai JiaoTong University, Shanghai, China
| | - Yuying Wang
- Department of Endocrinology and Metabolism, RenJi Hospital, School of Medicine, Shanghai JiaoTong University, Shanghai, China
| | - Yun Sun
- Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Center for Reproductive Medicine, RenJi Hospital, School of Medicine, Shanghai JiaoTong University, Shanghai, China
| | - Wei Liu
- Department of Endocrinology and Metabolism, RenJi Hospital, School of Medicine, Shanghai JiaoTong University, Shanghai, China.,Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Center for Reproductive Medicine, RenJi Hospital, School of Medicine, Shanghai JiaoTong University, Shanghai, China
| | - Huiyong Yin
- Key Laboratory of Food Safety Research, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, China.,University of the Chinese Academy of Sciences, Shanghai, China.,Key Laboratory of Food Safety Risk Assessment, Ministry of Health, Beijing, China.,Mass Spectrometry Research Center, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, China.,School of Life Science and Technology, ShanghaiTech University, Shanghai, China
| | - Tao Tao
- Department of Endocrinology and Metabolism, RenJi Hospital, School of Medicine, Shanghai JiaoTong University, Shanghai, China
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14
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Arachidonic acid: Physiological roles and potential health benefits - A review. J Adv Res 2017; 11:33-41. [PMID: 30034874 PMCID: PMC6052655 DOI: 10.1016/j.jare.2017.11.004] [Citation(s) in RCA: 309] [Impact Index Per Article: 44.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2017] [Revised: 11/16/2017] [Accepted: 11/17/2017] [Indexed: 12/17/2022] Open
Abstract
It is time to shift the arachidonic acid (ARA) paradigm from a harm-generating molecule to its status of polyunsaturated fatty acid essential for normal health. ARA is an integral constituent of biological cell membrane, conferring it with fluidity and flexibility, so necessary for the function of all cells, especially in nervous system, skeletal muscle, and immune system. Arachidonic acid is obtained from food or by desaturation and chain elongation of the plant-rich essential fatty acid, linoleic acid. Free ARA modulates the function of ion channels, several receptors and enzymes, via activation as well as inhibition. That explains its fundamental role in the proper function of the brain and muscles and its protective potential against Schistosoma mansoni and S. haematobium infection and tumor initiation, development, and metastasis. Arachidonic acid in cell membranes undergoes reacylation/deacylation cycles, which keep the concentration of free ARA in cells at a very low level and limit ARA availability to oxidation. Metabolites derived from ARA oxidation do not initiate but contribute to inflammation and most importantly lead to the generation of mediators responsible for resolving inflammation and wound healing. Endocannabinoids are oxidation-independent ARA derivatives, critically important for brain reward signaling, motivational processes, emotion, stress responses, pain, and energy balance. Free ARA and metabolites promote and modulate type 2 immune responses, which are critically important in resistance to parasites and allergens insult, directly via action on eosinophils, basophils, and mast cells and indirectly by binding to specific receptors on innate lymphoid cells. In conclusion, the present review advocates the innumerable ARA roles and considerable importance for normal health.
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15
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Soltani EK, Cerezuela R, Charef N, Mezaache-Aichour S, Esteban MA, Zerroug MM. Algerian propolis extracts: Chemical composition, bactericidal activity and in vitro effects on gilthead seabream innate immune responses. FISH & SHELLFISH IMMUNOLOGY 2017; 62:57-67. [PMID: 28089892 DOI: 10.1016/j.fsi.2017.01.009] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2016] [Revised: 12/28/2016] [Accepted: 01/06/2017] [Indexed: 05/10/2023]
Abstract
Propolis has been used as a medicinal agent for centuries. The chemical composition of four propolis samples collected from four locations of the Sétif region, Algeria, using gas chromatography-mass spectrometry was determined. More than 20 compounds and from 30 to 35 compounds were identified in the aqueous and ethanolic extracts, respectively. Furthermore, the antimicrobial activity of the propolis extracts against two marine pathogenic bacteria was evaluated. Finally, the in vitro effects of propolis on gilthead seabream (Sparus aurata L.) leucocyte activities were measured. The bactericidal activity of ethanolic extracts was very high against Shewanella putrefaciens, average against Photobacterium damselae and very low against Vibrio harveyi. The lowest bactericidal activity was always that found for the aqueous extracts. When the viability of gilthead seabream head-kidney leucocytes was measured after 30 min' incubation with the different extracts, both the ethanolic and aqueous extracts of one of the propolis samples (from Babor) and the aqueous extract of another (from Ain-Abbassa) provoked a significant decrease in cell viability when used at concentrations of 100 and 200 μg ml-1. Furthermore, significant inhibitory effects were recorded on leucocyte respiratory burst activity when isolated leucocytes where preincubated with the extracts. This effect was dose-dependent in all cases except when extracts from a third propolis sample (from Boutaleb) were used. Our findings suggest that some of Algerian propolis extracts have bactericidal activity against important bacterial pathogens in seabream and significantly modulate in vitro leucocyte activities, confirming their potential as a source of new natural biocides and/or immunomodulators in aquaculture practice.
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Affiliation(s)
- El-Khamsa Soltani
- Laboratory of Applied Biochemistry, Faculty of Natural and Life Sciences, University Ferhat Abbas Sétif 1, Algeria
| | - Rebeca Cerezuela
- Fish Innate Immune System Group, Department of Cell Biology and Histology, Faculty of Biology, Regional Campus of International Excellence "Campus Mare Nostrum", University of Murcia, 30100 Murcia, Spain
| | - Noureddine Charef
- Laboratory of Applied Biochemistry, Faculty of Natural and Life Sciences, University Ferhat Abbas Sétif 1, Algeria
| | - Samia Mezaache-Aichour
- Laboratory of Applied Microbiology, Faculty of Natural and Life Sciences, University Ferhat Abbas Sétif 1, Algeria
| | - Maria Angeles Esteban
- Fish Innate Immune System Group, Department of Cell Biology and Histology, Faculty of Biology, Regional Campus of International Excellence "Campus Mare Nostrum", University of Murcia, 30100 Murcia, Spain.
| | - Mohamed Mihoub Zerroug
- Laboratory of Applied Microbiology, Faculty of Natural and Life Sciences, University Ferhat Abbas Sétif 1, Algeria
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16
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Le Guernic A, Sanchez W, Palluel O, Bado-Nilles A, Turies C, Chadili E, Cavalié I, Adam-Guillermin C, Porcher JM, Geffard A, Betoulle S, Gagnaire B. In situ experiments to assess effects of constraints linked to caging on ecotoxicity biomarkers of the three-spined stickleback (Gasterosteus aculeatus L.). FISH PHYSIOLOGY AND BIOCHEMISTRY 2016; 42:643-657. [PMID: 26585997 DOI: 10.1007/s10695-015-0166-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2015] [Accepted: 11/11/2015] [Indexed: 06/05/2023]
Abstract
The aim of this study was to evaluate the effects of caging constraints on multiple fish biomarkers used during ecotoxicological studies (biometric data, immune and antioxidant systems, and energetic status). Two of these constraints were linked to caging: starvation and fish density in cages, and one in relation to the post-caging handling: a short transport. Three in situ experiments were conducted with three-spined sticklebacks (Gasterosteus aculeatus). The first experiment compared the effects of three densities (low, medium, and high). The second experiment compared effects of starvation in fish fed every two days with fish that were not fed. Finally comparisons between sticklebacks which have suffered a short car transport after caging and sticklebacks killed without preliminary transport were made. The lack of food had no effect on fish energetic reserves but negatively affected their condition index and their immune system. Transport and high density induced oxidative stress, defined as an overproduction of reactive oxygen species and a stimulation of the antioxidant system. These two constraints also harmed the leucocyte viability. In order not to have any impact on ecotoxicity biomarkers during in situ experiments, it is preferable to decrease fish density in cages, prevent transport before dissections, and feed fish when the caging lasts more than two weeks.
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Affiliation(s)
- Antoine Le Guernic
- PRP-ENV/SERIS/LECO, Centre de Cadarache, Institut de Radioprotection et de Sûreté Nucléaire (IRSN), 13115, Saint-Paul-lez-Durance, France.
- UMR-I 02 SEBIO (Stress Environnementaux et Biosurveillance des milieux aquatiques), Institut National de l'Environnement Industriel et des Risques (INERIS), BP 2, 60550, Verneuil-en-Halatte, France.
- UMR-I 02 SEBIO, UFR Sciences Exactes et Naturelles, Université de Reims Champagne-Ardenne (URCA), Campus Moulin de la Housse, B.P. 1039, 51687, Reims, France.
| | - Wilfried Sanchez
- UMR-I 02 SEBIO (Stress Environnementaux et Biosurveillance des milieux aquatiques), Institut National de l'Environnement Industriel et des Risques (INERIS), BP 2, 60550, Verneuil-en-Halatte, France
| | - Olivier Palluel
- UMR-I 02 SEBIO (Stress Environnementaux et Biosurveillance des milieux aquatiques), Institut National de l'Environnement Industriel et des Risques (INERIS), BP 2, 60550, Verneuil-en-Halatte, France
| | - Anne Bado-Nilles
- UMR-I 02 SEBIO (Stress Environnementaux et Biosurveillance des milieux aquatiques), Institut National de l'Environnement Industriel et des Risques (INERIS), BP 2, 60550, Verneuil-en-Halatte, France
| | - Cyril Turies
- UMR-I 02 SEBIO (Stress Environnementaux et Biosurveillance des milieux aquatiques), Institut National de l'Environnement Industriel et des Risques (INERIS), BP 2, 60550, Verneuil-en-Halatte, France
| | - Edith Chadili
- UMR-I 02 SEBIO (Stress Environnementaux et Biosurveillance des milieux aquatiques), Institut National de l'Environnement Industriel et des Risques (INERIS), BP 2, 60550, Verneuil-en-Halatte, France
| | - Isabelle Cavalié
- PRP-ENV/SERIS/LECO, Centre de Cadarache, Institut de Radioprotection et de Sûreté Nucléaire (IRSN), 13115, Saint-Paul-lez-Durance, France
| | - Christelle Adam-Guillermin
- PRP-ENV/SERIS/LECO, Centre de Cadarache, Institut de Radioprotection et de Sûreté Nucléaire (IRSN), 13115, Saint-Paul-lez-Durance, France
| | - Jean-Marc Porcher
- UMR-I 02 SEBIO (Stress Environnementaux et Biosurveillance des milieux aquatiques), Institut National de l'Environnement Industriel et des Risques (INERIS), BP 2, 60550, Verneuil-en-Halatte, France
| | - Alain Geffard
- UMR-I 02 SEBIO, UFR Sciences Exactes et Naturelles, Université de Reims Champagne-Ardenne (URCA), Campus Moulin de la Housse, B.P. 1039, 51687, Reims, France
| | - Stéphane Betoulle
- UMR-I 02 SEBIO, UFR Sciences Exactes et Naturelles, Université de Reims Champagne-Ardenne (URCA), Campus Moulin de la Housse, B.P. 1039, 51687, Reims, France
| | - Béatrice Gagnaire
- PRP-ENV/SERIS/LECO, Centre de Cadarache, Institut de Radioprotection et de Sûreté Nucléaire (IRSN), 13115, Saint-Paul-lez-Durance, France
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17
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Klek S. Omega-3 Fatty Acids in Modern Parenteral Nutrition: A Review of the Current Evidence. J Clin Med 2016; 5:E34. [PMID: 26959070 PMCID: PMC4810105 DOI: 10.3390/jcm5030034] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2015] [Revised: 02/10/2016] [Accepted: 03/01/2016] [Indexed: 12/21/2022] Open
Abstract
Intravenous lipid emulsions are an essential component of parenteral nutrition regimens. Originally employed as an efficient non-glucose energy source to reduce the adverse effects of high glucose intake and provide essential fatty acids, lipid emulsions have assumed a larger therapeutic role due to research demonstrating the effects of omega-3 and omega-6 polyunsaturated fatty acids (PUFA) on key metabolic functions, including inflammatory and immune response, coagulation, and cell signaling. Indeed, emerging evidence suggests that the effects of omega-3 PUFA on inflammation and immune response result in meaningful therapeutic benefits in surgical, cancer, and critically ill patients as well as patients requiring long-term parenteral nutrition. The present review provides an overview of the mechanisms of action through which omega-3 and omega-6 PUFA modulate the immune-inflammatory response and summarizes the current body of evidence regarding the clinical and pharmacoeconomic benefits of intravenous n-3 fatty acid-containing lipid emulsions in patients requiring parenteral nutrition.
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Affiliation(s)
- Stanislaw Klek
- Stanley Dudrick's Memorial Hospital, General Surgery Unit, Skawina 32-050, Poland.
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18
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Abstract
In this meta-study, we aimed to integrate biological insights gained from two levels of -omics analyses on the response to systemic inflammation induced by lipopolysaccharide in humans. We characterized the interplay between plasma metabolite compositions and transcriptional response of leukocytes through integration of transcriptomics with plasma metabonomics. We hypothesized that the drastic changes in the immediate environment of the leukocytes might have an adaptive effect on shaping their transcriptional response in conjunction with the initial inflammatory stimuli. Indeed, we observed that leukocytes, most notably, tune the activity of lipid- and protein-associated processes at the transcriptional level in accordance with the fluctuations in metabolite compositions of surrounding plasma. A closer look into the transcriptional control of only metabolic pathways uncovered alterations in bioenergetics and defenses against oxidative stress closely associated with mitochondrial dysfunction and shifts in energy production observed during inflammatory processes.
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19
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Ryu JM, Lee HJ, Jung YH, Lee KH, Kim DI, Kim JY, Ko SH, Choi GE, Chai II, Song EJ, Oh JY, Lee SJ, Han HJ. Regulation of Stem Cell Fate by ROS-mediated Alteration of Metabolism. Int J Stem Cells 2015; 8:24-35. [PMID: 26019752 PMCID: PMC4445707 DOI: 10.15283/ijsc.2015.8.1.24] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2015] [Accepted: 04/14/2015] [Indexed: 02/06/2023] Open
Abstract
Stem cells have attracted much attention due to their distinct features that support infinite self-renewal and differentiation into the cellular derivatives of three lineages. Recent studies have suggested that many stem cells both embryonic and adult stem cells reside in a specialized niche defined by hypoxic condition. In this respect, distinguishing functional differences arising from the oxygen concentration is important in understanding the nature of stem cells and in controlling stem cell fate for therapeutic purposes. ROS act as cellular signaling molecules involved in the propagation of signaling and the translation of environmental cues into cellular responses to maintain cellular homeostasis, which is mediated by the coordination of various cellular processes, and to adapt cellular activity to available bioenergetic sources. Thus, in this review, we describe the physiological role of ROS in stem cell fate and its effect on the metabolic regulation of stem cells.
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Affiliation(s)
- Jung Min Ryu
- Department of Veterinary Physiology, College of Veterinary Medicine and Research Institute for Veterinary Science, and BK21 PLUS Creative Veterinary Research Center, Seoul National University, Seoul, Korea
| | - Hyun Jik Lee
- Department of Veterinary Physiology, College of Veterinary Medicine and Research Institute for Veterinary Science, and BK21 PLUS Creative Veterinary Research Center, Seoul National University, Seoul, Korea
| | - Young Hyun Jung
- Department of Veterinary Physiology, College of Veterinary Medicine and Research Institute for Veterinary Science, and BK21 PLUS Creative Veterinary Research Center, Seoul National University, Seoul, Korea
| | - Ki Hoon Lee
- Department of Veterinary Physiology, College of Veterinary Medicine and Research Institute for Veterinary Science, and BK21 PLUS Creative Veterinary Research Center, Seoul National University, Seoul, Korea
| | - Dah Ihm Kim
- Department of Veterinary Physiology, College of Veterinary Medicine and Research Institute for Veterinary Science, and BK21 PLUS Creative Veterinary Research Center, Seoul National University, Seoul, Korea
| | - Jeong Yeon Kim
- Department of Veterinary Physiology, College of Veterinary Medicine and Research Institute for Veterinary Science, and BK21 PLUS Creative Veterinary Research Center, Seoul National University, Seoul, Korea
| | - So Hee Ko
- Department of Veterinary Physiology, College of Veterinary Medicine and Research Institute for Veterinary Science, and BK21 PLUS Creative Veterinary Research Center, Seoul National University, Seoul, Korea
| | - Gee Euhn Choi
- Department of Veterinary Physiology, College of Veterinary Medicine and Research Institute for Veterinary Science, and BK21 PLUS Creative Veterinary Research Center, Seoul National University, Seoul, Korea
| | - Ing Ing Chai
- Department of Veterinary Physiology, College of Veterinary Medicine and Research Institute for Veterinary Science, and BK21 PLUS Creative Veterinary Research Center, Seoul National University, Seoul, Korea
| | - Eun Ju Song
- Department of Veterinary Physiology, College of Veterinary Medicine and Research Institute for Veterinary Science, and BK21 PLUS Creative Veterinary Research Center, Seoul National University, Seoul, Korea
| | - Ji Young Oh
- Department of Veterinary Physiology, College of Veterinary Medicine and Research Institute for Veterinary Science, and BK21 PLUS Creative Veterinary Research Center, Seoul National University, Seoul, Korea
| | - Sei-Jung Lee
- Department of Veterinary Physiology, College of Veterinary Medicine and Research Institute for Veterinary Science, and BK21 PLUS Creative Veterinary Research Center, Seoul National University, Seoul, Korea
| | - Ho Jae Han
- Department of Veterinary Physiology, College of Veterinary Medicine and Research Institute for Veterinary Science, and BK21 PLUS Creative Veterinary Research Center, Seoul National University, Seoul, Korea
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Zueva KJ, Lumme J, Veselov AE, Kent MP, Lien S, Primmer CR. Footprints of directional selection in wild Atlantic salmon populations: evidence for parasite-driven evolution? PLoS One 2014; 9:e91672. [PMID: 24670947 PMCID: PMC3966780 DOI: 10.1371/journal.pone.0091672] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2013] [Accepted: 02/14/2014] [Indexed: 12/15/2022] Open
Abstract
Mechanisms of host-parasite co-adaptation have long been of interest in evolutionary biology; however, determining the genetic basis of parasite resistance has been challenging. Current advances in genome technologies provide new opportunities for obtaining a genome-scale view of the action of parasite-driven natural selection in wild populations and thus facilitate the search for specific genomic regions underlying inter-population differences in pathogen response. European populations of Atlantic salmon (Salmo salar L.) exhibit natural variance in susceptibility levels to the ectoparasite Gyrodactylus salaris Malmberg 1957, ranging from resistance to extreme susceptibility, and are therefore a good model for studying the evolution of virulence and resistance. However, distinguishing the molecular signatures of genetic drift and environment-associated selection in small populations such as land-locked Atlantic salmon populations presents a challenge, specifically in the search for pathogen-driven selection. We used a novel genome-scan analysis approach that enabled us to i) identify signals of selection in salmon populations affected by varying levels of genetic drift and ii) separate potentially selected loci into the categories of pathogen (G. salaris)-driven selection and selection acting upon other environmental characteristics. A total of 4631 single nucleotide polymorphisms (SNPs) were screened in Atlantic salmon from 12 different northern European populations. We identified three genomic regions potentially affected by parasite-driven selection, as well as three regions presumably affected by salinity-driven directional selection. Functional annotation of candidate SNPs is consistent with the role of the detected genomic regions in immune defence and, implicitly, in osmoregulation. These results provide new insights into the genetic basis of pathogen susceptibility in Atlantic salmon and will enable future searches for the specific genes involved.
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Affiliation(s)
- Ksenia J. Zueva
- Department of Biology, University of Turku, Turku, Finland
- * E-mail:
| | - Jaakko Lumme
- Department of Biology, University of Oulu, Oulu, Finland
| | - Alexey E. Veselov
- Institute of Biology, Karelian Research Centre of RAS, Petrozavodsk, Russia
| | - Matthew P. Kent
- Centre for Integrative Genetics (CIGENE) and Department of Animal and Aquacultural Sciences, Norwegian University of Life Sciences, Ås, Norway
| | - Sigbjørn Lien
- Centre for Integrative Genetics (CIGENE) and Department of Animal and Aquacultural Sciences, Norwegian University of Life Sciences, Ås, Norway
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Silva G, Garcia A, Faturi C, Lourenço Junior J, Nahúm B, Gonçalves A, Kawhage P, Silva L, Meneses A. Adição de óleo de palma na dieta sobre a lipidemia e a qualidade do sêmen de bubalinos (Bubalus bubalis). ARQ BRAS MED VET ZOO 2014. [DOI: 10.1590/s0102-09352014000100022] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
O estudo visou investigar o efeito da suplementação dietética com óleo de palma sobre o perfil sérico lipídico e as características seminais de touros bubalinos (Bubalus bubalis), bem como suas correlações. Doze touros foram alocados no Grupo CONT (n=5) ou Grupo ÓLEO (n=7) e receberam alimentação isoproteica composta por silagem de milho e concentrado (milho triturado, farelo de trigo e ureia), com proporção volumoso/concentrado de 50%, durante 130 dias (Períodos 1 e 2). Diferencialmente, óleo de palma foi adicionado ao concentrado (2% MS) do Grupo ÓLEO. Sêmen e sangue foram colhidos quinzenalmente. Houve aumento nas concentrações séricas de colesterol, HDL e lipídios totais nos animais do Grupo ÓLEO, enquanto o período influenciou nas taxas de colesterol, LDL, lipídios totais e VLDL (P<0,05). Houve decréscimo no turbilhonamento e discreta redução na integridade de membranas nos animais do Grupo ÓLEO (P<0,05). Correlações significativas foram encontradas entre triglicerídeos e defeitos menores (r=-0,412; P=0,006), LDL e defeitos totais (r=-0,333; P=0,030), lipídios totais e defeitos menores (r=-0.366; P= 0,017), lipídios totais e defeitos totais (r=-0.309; P= 0,046), e VLDL e viabilidade espermática (r=0,381; P=0,012), apontando efeitos positivos da maior lipidemia na morfologia e na viabilidade espermática. O uso de óleo de palma alterou o perfil lipídico sérico, mas não favoreceu per se os parâmetros seminais relacionados com o potencial de fertilidade dos touros.
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Affiliation(s)
| | | | - C. Faturi
- Universidade Federal Rural da Amazônia
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Maric T, Woodside B, Luheshi GN. The effects of dietary saturated fat on basal hypothalamic neuroinflammation in rats. Brain Behav Immun 2014; 36:35-45. [PMID: 24075847 DOI: 10.1016/j.bbi.2013.09.011] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/19/2013] [Revised: 09/18/2013] [Accepted: 09/18/2013] [Indexed: 01/04/2023] Open
Abstract
Recent evidence has demonstrated that consumption of high fat diets can trigger brain inflammation and subsequent injury in the absence of any peripheral inflammatory signaling. Here we sought to investigate whether a link exists between the concentration of highly saturated fats in the diet and the development of inflammation in the brain of rats and, whether the source of the saturated fat was an important factor in this process. Adult male rats had access to diets with a moderate level of total fat (32% of calories as fat) varying in level of saturated fat [low (20%) vs high (>60%)] and its source (butter or coconut oil). After 8 weeks of diet exposure peripheral and central tissues were collected for analysis of inflammatory signals. Neither blood nor white adipose tissue exhibited any changes in inflammatory mediators regardless of the saturated fat content or the source. In the brain however, we observed significant hypothalamic upregulation of the expression of markers of glial activation as well as of interleukin (IL)-1,6 and nuclear factor (NF)-IL-6, which were highest in the group fed the butter-based diets. The increase in these inflammatory mediators had no effect on basal body temperature or the temperature response to systemic lipopolysaccharide (LPS). The present results indicate that hypothalamic inflammation associated with consumption of diets high in fat is directly linked to the saturated fat content as well as the source of that fat. These effects are likely linked to other pathophysiological changes in the regulation of metabolism.
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Affiliation(s)
- Tia Maric
- Douglas Mental Health University Institute, McGill University, Montreal, Quebec, Canada
| | - Barbara Woodside
- Center for Studies in Behavioural Neurobiology, Concordia University, Montreal, Quebec, Canada
| | - Giamal N Luheshi
- Douglas Mental Health University Institute, McGill University, Montreal, Quebec, Canada.
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Role of omega-3 polyunsaturated fatty acids in the production of prostaglandin E2 and nitric oxide during experimental murine paracoccidioidomycosis. BIOMED RESEARCH INTERNATIONAL 2013; 2013:947687. [PMID: 24455741 PMCID: PMC3886617 DOI: 10.1155/2013/947687] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/18/2013] [Revised: 09/25/2013] [Accepted: 10/07/2013] [Indexed: 11/23/2022]
Abstract
There has recently been increased interest in the potential health effects of omega-3 polyunsaturated fatty acids on the immune system. Paracoccidioidomycosis is the most important endemic mycosis in Latin America. Macrophages have a fundamental role and act as first line of organism defense. The purpose of this study was to analyze the effect of n-3 fatty acids on the production of PGE2 and NO by mice infected with Pb18 and fed a diet enriched with LNA for 8 weeks. To study the effect of omega-3 fatty acids on macrophage activity during experimental paracoccidioidomycosis, mice were infected with Pb18 and fed a diet supplemented with LNA. PGE2 in the serum of animals was analyzed and NO in the supernatants of macrophages cultured and challenged in vitro with Pb18 was measured. Omega-3 fatty acids seemed to decrease the production of PGE2 in vivo in the infected group fed an LNA-supplemented diet during the 4th and 8th weeks of the experiment. At the same time, we observed an increase in synthesis of NO by peritoneal macrophages in this group. Omega-3 fatty acids thus appear to have an immunomodulatory effect in paracoccidioidomycosis.
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Keinan D, Leigh NJ, Nelson JW, De Oleo L, Baker OJ. Understanding resolvin signaling pathways to improve oral health. Int J Mol Sci 2013; 14:5501-18. [PMID: 23528855 PMCID: PMC3634469 DOI: 10.3390/ijms14035501] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2012] [Revised: 02/19/2013] [Accepted: 02/22/2013] [Indexed: 12/15/2022] Open
Abstract
The discovery of resolvins has been a major breakthrough for understanding the processes involved in resolution of inflammation. Resolvins belong to a family of novel lipid mediators that possess dual anti-inflammatory and pro-resolution actions. Specifically, they protect healthy tissue during immune-inflammatory responses to infection or injury, thereby aiding inflammation resolution and promoting tissue healing. One of the major concerns in modern medicine is the management and treatment of oral diseases, as they are related to systemic outcomes impacting the quality of life of many patients. This review summarizes known signaling pathways utilized by resolvins to regulate inflammatory responses associated with the oral cavity.
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Affiliation(s)
- David Keinan
- Department of Periodontics and Endodontics, School of Dental Medicine, University at Buffalo, the State University of New York, Buffalo, NY 14214-3932, USA; E-Mail:
- Department of Oral Biology, School of Dental Medicine, University at Buffalo, the State University of New York, Buffalo, NY 14214-3932, USA; E-Mails: (N.J.L.); (J.W.N.); (L.D.O.)
| | - Noel J. Leigh
- Department of Oral Biology, School of Dental Medicine, University at Buffalo, the State University of New York, Buffalo, NY 14214-3932, USA; E-Mails: (N.J.L.); (J.W.N.); (L.D.O.)
| | - Joel W. Nelson
- Department of Oral Biology, School of Dental Medicine, University at Buffalo, the State University of New York, Buffalo, NY 14214-3932, USA; E-Mails: (N.J.L.); (J.W.N.); (L.D.O.)
| | - Laura De Oleo
- Department of Oral Biology, School of Dental Medicine, University at Buffalo, the State University of New York, Buffalo, NY 14214-3932, USA; E-Mails: (N.J.L.); (J.W.N.); (L.D.O.)
| | - Olga J. Baker
- Department of Oral Biology, School of Dental Medicine, University at Buffalo, the State University of New York, Buffalo, NY 14214-3932, USA; E-Mails: (N.J.L.); (J.W.N.); (L.D.O.)
- To whom correspondence should be addressed; E-Mail: ; Tel.: +1-716-829-3667; Fax: +1-716-829-3942
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25
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Sargi SC, Dalalio MMDO, Visentainer JV, Bezerra RC, Perini JÂDL, Stevanato FB, Visentainer JEL. Production of TNF-α, nitric oxide and hydrogen peroxide by macrophages from mice with paracoccidioidomycosis that were fed a linseed oil-enriched diet. Mem Inst Oswaldo Cruz 2012; 107:303-9. [PMID: 22510824 DOI: 10.1590/s0074-02762012000300003] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2011] [Accepted: 02/01/2012] [Indexed: 11/21/2022] Open
Abstract
Omega-3 polyunsaturated fatty acids (n-3 PUFA) can modulate the immune system and their primary effect is on macrophage function. Paracoccidioidomycosis (PCM) is an endemic systemic mycosis in Latin America that is caused by the dimorphic fungus Paracoccidioides brasiliensis (Pb). Macrophages are the main defence against this pathogen and have microbicidal activity that is dependent on interferon-Γ and tumour necrosis factor (TNF)-α. These cytokines stimulate the synthesis of nitric oxide (NO) and hydrogen peroxide (H₂O₂), leading to the death of the fungus. To study the effect of n-3 PUFA on the host immune response during experimental PCM, macrophages that were obtained from animals infected with Pb18 and fed a diet enriched by linseed (LIN) oil were cultured and challenged with the fungus in vitro. The macrophage function was analysed based on the concentrations of TNF-α, NO and H₂O₂. LIN oil seems to influence the production of TNF-α during the development of disease. A diet enriched with LIN oil influences the microbicidal activity of the macrophages by inducing the production of cytokines and metabolites such as NO and H₂O₂, predominantly in the chronic phase of infection.
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Affiliation(s)
- Sheisa Cyléia Sargi
- Laboratório de Imunogenética, Departamento de Ciências Básicas da Saúde, Universidade Estadual de Maringá, Maringá, PR, Brasil
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26
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Tentor J, Nakamura RT, Gidlund M, Barros-Mazon S, Harada LM, Zago VS, Oba JF, Faria ECD. Association of postalimentary lipemia with atherosclerotic manifestations. Braz J Med Biol Res 2012; 45:1086-94. [PMID: 22872287 PMCID: PMC3854154 DOI: 10.1590/s0100-879x2012007500127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2011] [Accepted: 07/20/2012] [Indexed: 11/23/2022] Open
Abstract
We identified different lipemic and metabolic responses after the ingestion of a standardized meal by healthy adults and related them to atherosclerotic markers. Samples from 60 normolipidemic adults were collected before and after a liquid meal (40 g fat/m2 body surface) at 0, 2, 4, 6, and 8 h for measurements of lipids, free fatty acids (FFA), insulin, cholesteryl ester transfer protein (CETP), autoantibodies to epitopes of oxidized LDL (oxLDL Ab), lipolytic activities, and apolipoprotein E polymorphism. Mean carotid intima-media thickness (cIMT) was determined by Doppler ultrasound. The volunteers were classified into early (N = 39) and late (N = 31) triacylglycerol (TAG) responders to the test meal. Late responders showed lower HDL cholesterol concentration at fasting and in the TAG peak, lower insulin and higher FFA concentrations compared to early responders. Multivariate regression analyses showed that mean cIMT was associated with gender (male) and age in early responders and by cholesterol levels at the 6th hour in late responders. oxLDL Ab were explained by lipoprotein lipase and negatively by hepatic lipase and oxLDL Ab (fasting period) by CETP (negative) and FFA (positive). This study is the first to identify a postalimentary insulin resistance state, combined with a reduced CETP response exclusively among late responders, and the identification of the regulators of postalimentary atherogenicity. Further research is required to determine the metabolic mechanisms described in the different postalimentary phenotypes observed in this study, as well as in different pathological states, as currently investigated in our laboratory.
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Affiliation(s)
- J Tentor
- Departamento de Patologia Clínica, Faculdade de Ciências Médicas, Universidade Estadual de Campinas, Campinas, SP, Brasil
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27
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Otton R, Marin DP, Bolin AP, de Cássia Santos Macedo R, Campoio TR, Fineto C, Guerra BA, Leite JR, Barros MP, Mattei R. Combined fish oil and astaxanthin supplementation modulates rat lymphocyte function. Eur J Nutr 2011; 51:707-18. [PMID: 21972007 DOI: 10.1007/s00394-011-0250-z] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2011] [Accepted: 09/16/2011] [Indexed: 12/31/2022]
Abstract
PURPOSE Higher intakes of n-3 polyunsaturated fatty acids that are abundant in marine fishes have been long described as a "good nutritional intervention" with increasing clinical benefits to cardiovascular health, inflammation, mental, and neurodegenerative diseases. The present study was designed to investigate the effect of daily fish oil (FO-10 mg EPA/kg body weight (BW) and 7 mg DHA/kg BW) intake by oral gavage associated with the antioxidant astaxanthin (ASTA-1 mg/kg BW) on the redox metabolism and the functional properties of lymphocytes from rat lymph nodes. METHODS This study was conducted by measurements of lymphocyte proliferation capacity, ROS production [superoxide (O₂(•-)) and hydrogen peroxide (H₂O₂)], nitric oxide (NO(•)) generation, intracellular calcium release, oxidative damage to lipids and proteins, activities of major antioxidant enzymes, GSH/GSSG content, and cytokines release. RESULTS After 45 days of FO + ASTA supplementation, the proliferation capacity of activated T- and B-lymphocytes was significantly diminished followed by lower levels of O₂(•-), H₂O₂ and NO(•) production, and increased activities of total/SOD, GR and GPx, and calcium release in cytosol. ASTA was able to prevent oxidative modification in cell structures through the suppression of the oxidative stress condition imposed by FO. L: -selectin was increased by FO, and IL-1β was decreased only by ASTA supplementation. CONCLUSION We can propose that association of ASTA with FO could be a good strategy to prevent oxidative stress induced by polyunsaturated fatty acids and also to potentiate immuno-modulatory effects of FO.
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Affiliation(s)
- Rosemari Otton
- Postgraduate Program, Health Sciences, CBS, Cruzeiro do Sul University, Sao Paulo, SP, Brazil.
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Campoio T, Oliveira F, Otton R. Oxidative stress in human lymphocytes treated with fatty acid mixture: Role of carotenoid astaxanthin. Toxicol In Vitro 2011; 25:1448-56. [DOI: 10.1016/j.tiv.2011.04.018] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2011] [Revised: 04/18/2011] [Accepted: 04/19/2011] [Indexed: 01/09/2023]
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29
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Okoye FBC, Osadebe PO, Nworu CS, Okoye NN, Omeje EO, Esimone CO. Topical anti-inflammatory constituents of lipophilic leaf fractions of Alchornea floribunda and Alchornea cordifolia. Nat Prod Res 2011; 25:1941-9. [PMID: 21707250 DOI: 10.1080/14786419.2010.512272] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
The leaves of Alchornea floribunda and Alchornea cordifolia are used traditionally as topical anti-inflammatory agents. In this study, two highly lipophilic fractions AFLF and ACLF isolated from A. floribunda and A. cordifolia leaves respectively were investigated for topical anti-inflammatory effects using xylene-induced mice ear oedema as a model of inflammation. AFLF and ACLF at 5 mg per ear showed significant (p < 0.01) topical anti-inflammatory effect with oedema inhibitions of 64.0% and 79.0% at 2 h, respectively. When compared to indomethacin (5 mg per ear), these fractions showed significantly (p < 0.05) higher topical anti-inflammatory effect. Gas chromatography-mass spectrometry analysis revealed that AFLF is composed mainly of long chain saturated and unsaturated hydrocarbons (18.78%) and their oxygenated derivatives (1.89%); while ACLF is rich in volatile oils eugenol (21.26%) and cadinol (4.76%), and other constituents like, nanocosaine (36.86%) and steroid derivatives, ethyl iso-allocholate (4.59%) and 3-acetoxy-7,8-epoxylanostan-1-ol (15.86%). Analysis of the volatile oil (ACV) extracted from the fresh leaves of A. cordifolia revealed the presence of high concentrations of eugenol (41.7%), cadinol (2.46%), Caryophylene (1.04%), Linalool (30.59%) and (E)-α-bergamotene (4.54%). These compounds could be contributing to the topical anti-inflammatory effects of A. floribunda and A. cordifolia leaf extracts.
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Affiliation(s)
- F B C Okoye
- Department of Pharmaceutical and Medicinal Chemistry, Faculty of Pharmaceutical Sciences, University of Nigeria, Nsukka 410001, Enugu State,
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Seguineau C, Racotta IS, Palacios E, Delaporte M, Moal J, Soudant P. The influence of dietary supplementation of arachidonic acid on prostaglandin production and oxidative stress in the Pacific oyster Crassostrea gigas. Comp Biochem Physiol A Mol Integr Physiol 2011; 160:87-93. [PMID: 21624493 DOI: 10.1016/j.cbpa.2011.05.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2011] [Revised: 05/12/2011] [Accepted: 05/13/2011] [Indexed: 10/18/2022]
Abstract
In a previous study, dietary supplementation with arachidonic acid (ARA) to oysters Crassostrea gigas increased haemocyte numbers, phagocytosis, and production of reactive oxygen species level (ROS) by haemocytes (Delaporte et al., 2006). To assess if the observed stimulation of these cellular responses resulted from changes of ARA-related prostaglandin (PG) production, we analysed prostaglandin E2 metabolite (PGEM) content on the same oysters fed three levels of ARA. Dietary supply of polyunsaturated fatty acids (PUFA) could also induce an oxidative stress that could similarly increase cellular responses; therefore, two indicators of oxidative stress were analysed: peroxidation level and antioxidant defence status. Together the observed positive correlation between ARA and PGEM levels and the absence of lipid peroxidation and antioxidant activity changes supports the hypothesis of an immune stimulation via PG synthesis. Although ARA proportion in oyster tissues increased by up to 7-fold in response to ARA dietary supplementation, peroxidation index did not change because of a compensatory decrease in n-3 fatty acid proportion, mainly 22:6n-3. To further confirm the involvement of PG in the changes of haemocyte count, phagocytosis and ROS production upon ARA supplementation, it would be interesting to test cyclooxygenase and lipooxygenase inhibitors in similar experiments.
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Affiliation(s)
- Catherine Seguineau
- Université de Bretagne Occidentale, Brest, France et UMR 100 Physiologie et Ecophysiologie des Mollusques Marins, Centre IFREMER de Brest, BP70, 29280 Plouzané, France
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31
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Li N, Tan W, Li J, Li P, Lee S, Wang Y, Gong Y. Glucose Metabolism in Breast Cancer and its Implication in Cancer Therapy. ACTA ACUST UNITED AC 2011. [DOI: 10.4236/ijcm.2011.22022] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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32
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Perini JÂDL, Stevanato FB, Sargi SC, Visentainer JEL, Dalalio MMDO, Matshushita M, Souza NED, Visentainer JV. Ácidos graxos poli-insaturados n-3 e n-6: metabolismo em mamíferos e resposta imune. REV NUTR 2010. [DOI: 10.1590/s1415-52732010000600013] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
A experimentação animal apresenta uma grande importância para o desenvolvimento da ciência. O uso de camundongos em experimentos ocorre devido à semelhança destes animais com os seres humanos, fácil criação e manutenção e resposta experimental bastante rápida. Esses animais possuem as mesmas enzimas dessaturases e elongases que os humanos, por isso são usados em pesquisas envolvendo incorporação e síntese de ácidos graxos em tecidos. Os ácidos graxos da família ômega-3 e ômega-6 são de suma importância na dieta humana, pois estes não são sintetizados pela síntese de novo e são precursores dos ácidos graxos poli-insaturados de cadeia muito longa, como os ácidos eicosapentaenóico, docosahexaenóico e araquidônico. Estes desempenham funções importantes no organismo, como a síntese de eicosanóides que estão envolvidos diretamente no sistema imune e nas respostas inflamatórias. A razão entre o consumo de ácidos graxos n-6 e n-3 na dieta é um importante fator para determinar a ingestão adequada de ácidos graxos bem como prevenir o aparecimento de doenças. Este artigo tem como objetivo avaliar a incorporação de ácidos graxos em tecidos de animais e discutir a importância dos ácidos da família n-3 e seus metabólitos no sistema imunológico.
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Campa D, Hüsing A, Chang-Claude J, Dostal L, Boeing H, Kröger J, Tjønneland A, Roswall N, Overvad K, Dahm CC, Rodríguez L, Sala N, Pérez MJS, Larrañaga N, Chirlaque MD, Ardanaz E, Khaw KT, Wareham N, Allen NE, Travis RC, Trichopoulou A, Naska A, Bamia C, Palli D, Sieri S, Tumino R, Sacerdote C, van Kranen HJ, Bas Bueno-de-Mesquita H, Stattin P, Johansson M, Chajes V, Rinaldi S, Romieu I, Siddiq A, Norat T, Riboli E, Kaaks R, Canzian F. Genetic variability of the fatty acid synthase pathway is not associated with prostate cancer risk in the European Prospective Investigation on Cancer (EPIC). Eur J Cancer 2010; 47:420-7. [PMID: 20965718 DOI: 10.1016/j.ejca.2010.09.029] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2010] [Revised: 09/16/2010] [Accepted: 09/16/2010] [Indexed: 11/28/2022]
Abstract
A western lifestyle, characterised by low rates of energy expenditure and a high-energy diet rich in animal protein, saturated fats and refined carbohydrates, is associated with high incidence of prostate cancer in men. A high-energy nutritional status results in insulin/IGF signalling in cells, which in turn stimulates synthesis of fatty acids. We investigated whether the genetic variability of the genes belonging to the fatty acid synthesis pathway is related to prostate cancer risk in 815 prostate cancer cases and 1266 controls from the European Prospective Investigation on Cancer (EPIC). Using a tagging approach and selecting 252 SNPs in 22 genes, we covered all the common genetic variation of this pathway. None of the SNPs reached statistical significance after adjusting for multiple comparisons. Common SNPs in the fatty acid synthase pathway are not major contributors to prostate cancer risk.
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Affiliation(s)
- Daniele Campa
- German Cancer Research Center, DKFZ, Heidelberg, Germany
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Lymphocytes transfer [(14)C]-labeled fatty acids to skeletal muscle in culture; modulation by exercise. Cell Biochem Funct 2010; 28:278-82. [PMID: 20517891 DOI: 10.1002/cbf.1652] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Previous studies have shown that lipids are transferred from lymphocytes (Ly) to different cell types including macrophages, enterocytes, and pancreatic beta cells in co-culture. This study investigated whether [(14)C]-labeled fatty acids (FA) can be transferred from Ly to skeletal muscle (SM), and the effects of exercise on such phenomenon. Ly obtained from exercised (EX) and control (C) male Wistar rats were preloaded with the [(14)C]-labeled free FA palmitic (PA), oleic (OA), linoleic (LA), or arachidonic (AA). Radioactively loaded Ly were then co-cultured with SM from the same Ly donor animals. Substantial amounts of FA were transferred to SM being the profile PA = OA > AA > LA to the C group, and PA > OA > LA > AA to the EX group. These FA were incorporated predominantly as phospholipids (PA = 66.75%; OA = 63.09%; LA = 43.86%; AA = 47.40%) in the C group and (PA = 63.99% OA = 52.72%; LA = 55.99%; AA = 63.40%) in the EX group. Also in this group, the remaining radioactivity from AA, LA, and OA acids was mainly incorporated in structural and energetic lipids. These results support the hypothesis that Ly are able to export lipids to SM in co-culture. Furthermore, exercise modulates the lipid transference profile, and its incorporation on SM. The overall significance of this phenomenon in vivo remains to be elucidated.
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Ambrozova G, Pekarova M, Lojek A. Effect of polyunsaturated fatty acids on the reactive oxygen and nitrogen species production by raw 264.7 macrophages. Eur J Nutr 2009; 49:133-9. [PMID: 19784538 DOI: 10.1007/s00394-009-0057-3] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2009] [Accepted: 09/17/2009] [Indexed: 12/27/2022]
Abstract
BACKGROUND Polyunsaturated fatty acids (PUFAs) can affect various functions of the immune system including inflammatory responses. An oxidative burst of phagocytes accompanied by reactive oxygen species (ROS) and reactive nitrogen species (RNS) formation is one of the phagocyte functions that could be modulated by PUFAs. AIM OF THE STUDY To investigate the effects of omega-3 (alpha-linolenic, docosahexaenoic, eicosapentaenoic) and omega-6 (arachidonic, linoleic) PUFAs on lipopolysaccharide (LPS)-stimulated ROS and RNS production by the murine macrophage cell line RAW 264.7. METHODS Murine peritoneal macrophages RAW 264.7 were stimulated with LPS (0.1 microg/ml) and treated with 0.1-100 microM omega-3 or omega-6 PUFAs for either 8 (ROS production) or 20 h (RNS production). The cytotoxicity of PUFAs was evaluated by an ATP (adenosine triphosphate) test after both 8 and 20 h of treatment with PUFAs. Changes in ROS production by LPS-treated macrophages subsequently activated with phorbol myristate acetate (PMA) or opsonized zymosan particles (OZP) were determined by luminol-enhanced chemiluminescence, whilst the production of RNS was determined as the concentration of nitrites in cell supernatants (Griess reaction). Changes in inducible nitric oxide synthase (iNOS) expression were evaluated by Western blot analysis. The antioxidant properties of PUFAs were tested by TRAP (total peroxyl radical-trapping antioxidant parameter) assay. RESULTS All PUFAs in 100 microM concentration except eicosapentaenoic acid decreased ROS production. The effect was most significant when docosahexaenoic acid was used. Arachidonic acid decreased PMA-activated ROS production even in 1 and 10 microM concentrations. On the other hand, 10 and 100 microM eicosapentaenoic acid potentiated ROS production. As concerns RNS production, all the fatty acids that were tested in a concentration of 100 microM decreased iNOS expression and nitrite accumulation. Fatty acids had no significant effect on the viability and proliferation of RAW 264.7 cells. The TRAP assay confirmed that none of the tested PUFAs exerted any significant antioxidant properties. CONCLUSION High concentrations of PUFAs of both omega-3 and omega-6 groups can inhibit ROS and RNS formation by stimulated macrophages. The expression of iNOS can also be inhibited. This effect, together with the absence of antioxidant activity and cytotoxic properties, indicates that PUFAs can participate in the regulation of enzymes responsible for reactive species production.
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Affiliation(s)
- Gabriela Ambrozova
- Institute of Biophysics, Academy of Sciences of the Czech Republic, Brno, Czech Republic
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sPhospholipase A(2) is inhibited by anthocyanidins. J Neural Transm (Vienna) 2009; 116:1071-7. [PMID: 19649692 DOI: 10.1007/s00702-009-0268-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2009] [Accepted: 07/10/2009] [Indexed: 12/19/2022]
Abstract
Epidemiological studies suggest that nutritional antioxidants may reduce the incidence of neurodegenerative disorders and age-related cognitive decline. Specifically, protection against oxidative stress and inflammation has served as a rationale for promoting diets rich in vegetables and fruits. The present study addresses secretory phospholipase A(2) (sPLA(2)) as a novel candidate effector of neuroprotection conferred by anthocyanins and anthocyanidins. Using a photometric assay, 15 compounds were screened for their ability to inhibit PLA(2). Of these, cyanidin, malvidin, peonidin, petunidin, and delphinidin achieved K(i) values <or=18 microM, suggesting a modulatory role for berry polyphenols in phospholipid metabolism.
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Grando F, Felício C, Twardowschy A, Paula F, Batista V, Fernandes L, Curi R, Nishiyama A. Modulation of peritoneal macrophage activity by the saturation state of the fatty acid moiety of phosphatidylcholine. Braz J Med Biol Res 2009; 42:599-605. [DOI: 10.1590/s0100-879x2009005000003] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2008] [Accepted: 03/27/2009] [Indexed: 11/22/2022] Open
Affiliation(s)
| | | | | | | | | | | | - R. Curi
- Universidade de São Paulo, Brasil
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Babu U, Wiesenfeld P, Gaines D, Raybourne RB. Effect of long chain fatty acids on Salmonella killing, superoxide and nitric oxide production by chicken macrophages. Int J Food Microbiol 2009; 132:67-72. [PMID: 19375809 DOI: 10.1016/j.ijfoodmicro.2009.03.017] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2008] [Revised: 02/10/2009] [Accepted: 03/23/2009] [Indexed: 12/21/2022]
Abstract
The objective of this study was to investigate the effect of uptake of different commonly consumed long chain fatty acids on superoxide (O(2)(-)), nitric oxide (NO) production, and ability to kill Salmonella enterica serotype typhimurium (S. typhimurium) by chicken macrophages (HD11 cells). All the fatty acids were taken up by HD11 cells with stearic acid uptake higher than polyunsaturated fatty acids. Uptake of green fluorescent protein-labeled bacteria and the viability of HD11 cells (measured by flow cytometry) was not affected by any of the fatty acids tested. Bacterial clearance (measured by the plating of sorted viable infected cells) was significantly higher with n-3 fatty acids alpha-linolenic acid (ALA) and docosahexanoic acid (DHA). However, stearic acid (SA) and the n-6 fatty acid, arachidonic acid (ARA) did not influence S. typhimurium killing by HD11 cells. The improved S. typhimurium clearance by ALA and DHA was not associated with increased NO or O(2)(-) production by HD11 cells. These results suggest a role for n-3 polyunsaturated fatty acids in Salmonella clearance by chicken macrophages however in vivo studies are essential to confirm their efficacy in controlling Salmonella infection in chickens and contamination in shell eggs.
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Affiliation(s)
- Uma Babu
- Immunobiology Branch, Food and Drug Administration, 8301 Muirkirk Rd., Laurel, MD 20708, USA.
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Milanski M, Degasperi G, Coope A, Morari J, Denis R, Cintra DE, Tsukumo DML, Anhe G, Amaral ME, Takahashi HK, Curi R, Oliveira HC, Carvalheira JBC, Bordin S, Saad MJ, Velloso LA. Saturated fatty acids produce an inflammatory response predominantly through the activation of TLR4 signaling in hypothalamus: implications for the pathogenesis of obesity. J Neurosci 2009; 29:359-70. [PMID: 19144836 PMCID: PMC6664935 DOI: 10.1523/jneurosci.2760-08.2009] [Citation(s) in RCA: 765] [Impact Index Per Article: 51.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
In animal models of diet-induced obesity, the activation of an inflammatory response in the hypothalamus produces molecular and functional resistance to the anorexigenic hormones insulin and leptin. The primary events triggered by dietary fats that ultimately lead to hypothalamic cytokine expression and inflammatory signaling are unknown. Here, we test the hypothesis that dietary fats act through the activation of toll-like receptors 2/4 and endoplasmic reticulum stress to induce cytokine expression in the hypothalamus of rodents. According to our results, long-chain saturated fatty acids activate predominantly toll-like receptor 4 signaling, which determines not only the induction of local cytokine expression but also promotes endoplasmic reticulum stress. Rats fed on a monounsaturated fat-rich diet do not develop hypothalamic leptin resistance, whereas toll-like receptor 4 loss-of-function mutation and immunopharmacological inhibition of toll-like receptor 4 protects mice from diet-induced obesity. Thus, toll-like receptor 4 acts as a predominant molecular target for saturated fatty acids in the hypothalamus, triggering the intracellular signaling network that induces an inflammatory response, and determines the resistance to anorexigenic signals.
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Affiliation(s)
| | | | | | | | | | | | | | - Gabriel Anhe
- 3Department of Physiology and Biophysics, University of São Paulo, 05508-900 São Paulo, Brazil
| | | | - Hilton K. Takahashi
- 3Department of Physiology and Biophysics, University of São Paulo, 05508-900 São Paulo, Brazil
| | - Rui Curi
- 3Department of Physiology and Biophysics, University of São Paulo, 05508-900 São Paulo, Brazil
| | - Helena C. Oliveira
- 2Physiology and Biophysics, Faculty of Medical Sciences, University of Campinas, 13083-970 Campinas, São Paulo, Brazil, and
| | | | - Silvana Bordin
- 3Department of Physiology and Biophysics, University of São Paulo, 05508-900 São Paulo, Brazil
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Binter C, Khol-Parisini A, Hellweg P, Gerner W, Schäfer K, Hulan HW, Saalmüller A, Zentek J. Phenotypic and functional aspects of the neonatal immune system as related to the maternal dietary fatty acid supply of sows. Arch Anim Nutr 2008; 62:439-53. [DOI: 10.1080/17450390802453385] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Thorvaldson L, Stålhammar S, Sandler S. Effects of a diabetes-like environment in vitro on cytokine production by mouse splenocytes. Cytokine 2008; 43:93-7. [DOI: 10.1016/j.cyto.2008.03.013] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2007] [Revised: 03/12/2008] [Accepted: 03/25/2008] [Indexed: 12/01/2022]
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Furuta E, Pai SK, Zhan R, Bandyopadhyay S, Watabe M, Mo YY, Hirota S, Hosobe S, Tsukada T, Miura K, Kamada S, Saito K, Iiizumi M, Liu W, Ericsson J, Watabe K. Fatty acid synthase gene is up-regulated by hypoxia via activation of Akt and sterol regulatory element binding protein-1. Cancer Res 2008; 68:1003-11. [PMID: 18281474 DOI: 10.1158/0008-5472.can-07-2489] [Citation(s) in RCA: 296] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The fatty acid synthase (FAS) gene is significantly up-regulated in various types of cancers, and blocking the FAS expression results in apoptosis of tumor cells. Therefore, FAS is considered to be an attractive target for anticancer therapy. However, the molecular mechanism by which the FAS gene is up-regulated in tumor cells is poorly understood. We found that FAS was significantly up-regulated by hypoxia, which was also accompanied by reactive oxygen species (ROS) generation in human breast cancer cell lines. The FAS expression was also activated by H(2)O(2), whereas N-acetyl-L-cystein, a ROS inhibitor, suppressed the expression. We also found that the hypoxia significantly up-regulated sterol regulatory-element binding protein (SREBP)-1, the major transcriptional regulator of the FAS gene, via phosphorylation of Akt followed by activation of hypoxia-inducible factor 1 (HIF1). Moreover, our results of reporter assay and chromatin immunoprecipitation analysis indicate that SREBP-1 strongly bound to the SREBP binding site/E-box sequence on the FAS promoter under hypoxia. In our xenograft mouse model, FAS was strongly expressed in the hypoxic regions of the tumor. In addition, our results of immunohistochemical analysis for human breast tumor specimens indicate that the expressions of both FAS and SREBP-1 were colocalized with hypoxic regions in the tumors. Furthermore, we found that hypoxia-induced chemoresistance to cyclophosphamide was partially blocked by a combination of FAS inhibitor and cyclophosphamide. Taken together, our results indicate that FAS gene is up-regulated by hypoxia via activation of the Akt and HIF1 followed by the induction of the SREBP-1 gene, and that hypoxia-induced chemoresistance is partly due to the up-regulation of FAS.
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Affiliation(s)
- Eiji Furuta
- Department of Medical Microbiology, Immunology, and Cell Biology, Southern Illinois University School of Medicine, Springfield, Illinois 62794-9626, USA
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Gorjão R, Cury-Boaventura MF, de Lima TM, Curi R. Regulation of human lymphocyte proliferation by fatty acids. Cell Biochem Funct 2007; 25:305-15. [PMID: 17195961 DOI: 10.1002/cbf.1388] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
In the present study, the effect of increasing concentrations of palmitic (PA, C16:0), stearic (SA, C18:0), oleic (OA, C18:1, n-9), linoleic (LA, C18:2n-6), docosahexaenoic (DHA, C22:6 n-3) and eicosapentaenoic (EPA, C20:5 n-3) acids on lymphocyte proliferation was investigated. The maximal non-toxic concentrations of these fatty acids for human lymphocytes in vitro were determined. It was also evaluated whether these fatty acids at non-toxic concentrations affect IL-2 induced lymphocyte proliferation and cell cycle progression. OA and LA at 25 microM increased lymphocyte proliferation and at higher concentrations (75 microM and 100 microM) inhibited it. Both fatty acids promoted cell death at 200 microM concentration. PA and SA decreased lymphocyte proliferation at 50 microM and promoted cell death at concentrations of 100 microM and above. EPA and DHA decreased lymphocyte proliferation at 25 and 50 microM being toxic at 50 and 100 microM, respectively. PA, SA, DHA and EPA decreased the stimulatory effect of IL-2 on lymphocyte proliferation, increasing the percentage of cells in G1 phase and decreasing the proportion of cells in S and G2/M phases. OA and LA caused an even greater pronounced effect. The treatment with all fatty acids increased neutral lipid accumulation in the cells but the effect was more pronounced with PA and DHA. In conclusion, PA, SA, DHA and EPA decreased lymphocyte proliferation, whereas OA and LA stimulated it at non-toxic concentrations.
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Affiliation(s)
- Renata Gorjão
- Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of São Paulo, São Paulo, SP, Brazil.
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Ledón N, Casacó A, Remirez D, González A, Cruz J, González R, Capote A, Tolón Z, Rojas E, Rodríguez VJ, Merino N, Rodríguez S, Ancheta O, Cano MC. Effects of a mixture of fatty acids from sugar cane (Saccharum officinarum L.) wax oil in two models of inflammation: zymosan-induced arthritis and mice tail test of psoriasis. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2007; 14:690-5. [PMID: 17292594 DOI: 10.1016/j.phymed.2006.12.019] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
A mixture of fatty acids obtained from sugar cane (Saccharum officinarum L.) wax oil (FAM), in which the main constituents are palmitic, oleic, linoleic, and linolenic acids, was evaluated in two models of inflammation: zymosan-induced arthritis and in the tail test for psoriasis, both on mice. In the first model, FAM significantly reduced zymozan-induced increase of beta glucuronidase (DE(50) 90+/-7 mg/kg). Histopathological studies showed inhibition in cellular infiltration and reduction of synovial hyperplasia and synovitis, whereas in the second test, histopathological and ultrastructural studies showed that topical application of FAM induced orthokeratosis with the presence of keratohyalin granules in the previously parakeratotic adult mouse tail, and without effects on epidermal thickness. The ED(50) of FAM in this model was 155+/-10 mg. The results of our studies showed that topical application of FAM exerts an important anti-inflammatory activity in both tests without evidence of irritant effects. The anti-inflamatory effects exerted by FAM may be due to its inhibitory effects on arachidonic acid metabolism. To our knowledge, this is the first report on the anti-inflammatory effect of sugar cane by-products in experimental models of arthritis and psoriasis.
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Affiliation(s)
- N Ledón
- Centro de Inmunología Molecular, Calle 216 y 17 Playa, Ave 41 #9811 e/ 98 y 100, C. Habana, Cuba.
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Gorjão R, Hirabara SM, de Lima TM, Cury-Boaventura MF, Curi R. Regulation of interleukin-2 signaling by fatty acids in human lymphocytes. J Lipid Res 2007; 48:2009-19. [PMID: 17592174 DOI: 10.1194/jlr.m700175-jlr200] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Docosahexaenoic (DHA; C22:6 n-3), eicosapentaenoic (EPA; C20:5 n-3), palmitic (PA; C16:0), and stearic (SA; C18:0) acids decrease lymphocyte proliferation in concentrations of >50 muM, as observed in our previous study. However, oleic acid (OA; C18:1 n-9) and linoleic acid (LA; C18:2 n-6) increase lymphocyte proliferation at 25 muM. In this study, the effect of these FAs on the interleukin-2 (IL-2) signaling pathway in human lymphocytes was investigated. Cells were isolated from heparinized venous blood of healthy human donors by density-gradient sedimentation. Cells were stimulated with 5 mug/ml concanavalin A and treated with FAs in the absence or presence of IL-2 for 1 hour. CD25-alpha externalization was analyzed by flow cytometry, and Janus kinase 1 (JAK1), JAK3, signal transducer and activator of transcription (STAT) 5, extracellular signal-regulated kinases (ERKs) 1 and 2, Akt, and protein kinase C (PKC)-zeta phosphorylation were analyzed by Western blotting. The expression of CD25-alpha at the cell surface was increased by DHA, SA, and PA but was unaffected by EPA, OA, and LA. PA, SA, DHA, and EPA decreased JAK1, JAK3, STAT5, and Akt phosphorylation induced by IL-2, but OA and LA did not cause any effect. OA and LA increased ERK1/2 phosphorylation, whereas the other FAs caused a marked decrease. PKC-zeta phosphorylation was decreased by OA and LA and was not altered by the remaining FAs. In conclusion, the inhibitory effect of PA, SA, DHA, and EPA on lymphocyte proliferation observed in our previous study was attributable to a decrease in JAK/STAT, ERK, and Akt pathways activated by IL-2. Probably, OA and LA stimulated lymphocyte proliferation by increasing ERK1/2 phosphorylation through PKC-zeta activation. The inhibition of JAK1, JAK3, STAT5, ERK1/2, and Akt phosphorylation caused by DHA, SA, and PA is associated with an alteration of CD25 expression at the cell surface.
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Affiliation(s)
- Renata Gorjão
- Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil.
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Martins de Lima T, Gorjão R, Hatanaka E, Cury-Boaventura MF, Portioli Silva EP, Procopio J, Curi R. Mechanisms by which fatty acids regulate leucocyte function. Clin Sci (Lond) 2007; 113:65-77. [PMID: 17555405 DOI: 10.1042/cs20070006] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Fatty acids (FAs) have been shown to alter leucocyte function and thus to modulate inflammatory and immune responses. In this review, the effects of FAs on several aspects of lymphocyte, neutrophil and macrophage function are discussed. The mechanisms by which FAs modulate the production of lipid mediators, activity of intracellular signalling pathways, activity of lipid-raft-associated proteins, binding to TLRs (Toll-like receptors), control of gene expression, activation of transcription factors, induction of cell death and production of reactive oxygen and nitrogen species are described in this review. The rationale for the use of specific FAs to treat patients with impaired immune function is explained. Substantial improvement in the therapeutic usage of FAs or FA derivatives may be possible based on an improvement in the understanding of the precise molecular mechanisms of action with respect to the different leucocyte types and outcome with respect to the inflammatory responses.
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Affiliation(s)
- Thais Martins de Lima
- Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of São Paulo, São Paulo, SP, Brazil
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Agunos AC, Yoo D, Youssef SA, Ran D, Binnington B, Hunter DB. Avian hepatitis E virus in an outbreak of hepatitis–splenomegaly syndrome and fatty liver haemorrhage syndrome in two flaxseed-fed layer flocks in Ontario. Avian Pathol 2007; 35:404-12. [PMID: 16990151 DOI: 10.1080/03079450600920976] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Two commercial layer chicken flocks that were fed a flax-based diet beginning at 28 weeks of age for the production of omega-3 fatty-acid-enriched eggs experienced increased mortality when the birds reached 37 weeks. The average weekly mortality was 0.34% over a 20-week period, with peak mortality of 0.9% for 1 week. Reduced feed consumption, reduced body weight gain and poor peak production were noticed prior to the onset of increased mortality. A total of 245 birds were necropsied and 78% of these had lesions in the liver and spleen, with 44% of those necropsied having changes consistent with hepatitis-splenomegaly syndrome, with lesions ranging from acute periportal lymphoplasmacytic hepatitis to chronic severe cholangiohepatitis with haemorrhage, vasculitis and amyloidosis. A total of 11% of the birds had lesions typical of fatty liver haemorrhagic syndrome, and 22% had lesions found in both hepatitis-splenomegaly syndrome and fatty liver haemorrhagic syndrome. No significant bacteria or viruses were recovered from samples of the liver/bile or spleen but 11 of 21 bile samples contained avian hepatitis E virus RNA detectable with a reverse transcriptase-polymerase chain reaction assay. Comparative sequence analysis found identities of 82 to 92% and 78 to 80% between the helicase and capsid protein genes, respectively, of the virus detected in this outbreak and those of other avian hepatitis E virus isolates, suggesting extensive genetic heterogeneity in avian hepatitis E viruses in Ontario flocks.
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Affiliation(s)
- A C Agunos
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, Ontario, Canada
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48
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Gorjão R, Verlengia R, Lima TMD, Soriano FG, Boaventura MFC, Kanunfre CC, Peres CM, Sampaio SC, Otton R, Folador A, Martins EF, Curi TCP, Portiolli EP, Newsholme P, Curi R. Effect of docosahexaenoic acid-rich fish oil supplementation on human leukocyte function. Clin Nutr 2006; 25:923-38. [PMID: 16697494 DOI: 10.1016/j.clnu.2006.03.004] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2006] [Revised: 03/10/2006] [Accepted: 03/17/2006] [Indexed: 11/24/2022]
Abstract
BACKGROUND The effect of a docosahexaenoic acid (DHA)-rich fish oil (FO) supplementation on human leukocyte function was investigated. METHODS Ten male volunteers were supplemented with 3g/day FO containing 26% eicosapentaenoic acid (EPA, 20:5, n-3) and 54% DHA (22:6, n-3) for 2 months. RESULTS FO supplementation changed the fatty acid (FA) composition of leukocytes resulting in an increase of n-3/n-6 ratio from 0.18 to 0.62 in lymphocytes and from 0.15 to 0.70 in neutrophils. DHA-rich FO stimulated an increase in phagocytic activity by 62% and 145% in neutrophils and monocytes, respectively. Neutrophil chemotactic response was increased by 128%. The rate of production of reactive oxygen species by neutrophils was also increased, as it was with lymphocyte proliferation. These changes were partially reversed after a 2-month wash out period. With respect to cytokine production by lymphocytes, interleukin (IL)-4 release was not altered, whereas secretions of IL-10, interferon (IFN)-gamma and tumor necrosis factor (TNF)-alpha were raised. These results are in contrast to those described by others using EPA-rich FO supplementation. Lymphocyte pleiotropic gene expression was analyzed by a macroarray technique. Of the analyzed genes (588 in total), 77 were modified by the supplementation. FO supplementation resulted in up-regulation of 6 genes (GATA binding protein 2, IL-6 signal transducer, transforming growth factor alpha, TNF, heat shock 90kDa protein 1-alpha and heat shock protein 70kDa 1A) and a down regulation of 71 genes (92.2% of total genes changed). The largest functional group of altered genes was that related to signaling pathways (22% of the total modified genes). CONCLUSIONS Therefore, although EPA and DHA are members of n-3 FA family, changes in the proportion of DHA and EPA exert different effects on neutrophil, monocyte and lymphocyte function, which may be a result of specific changes in gene expression.
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Affiliation(s)
- Renata Gorjão
- Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of São Paulo, Av. Prof. Lineu Prestes, 1524, 05508-900, Butantã, São Paulo, SP, Brazil.
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Lake SL, Scholljegerdes EJ, Small WT, Belden EL, Paisley SI, Rule DC, Hess BW. Immune response and serum immunoglobulin G concentrations in beef calves suckling cows of differing body condition score at parturition and supplemented with high-linoleate or high-oleate safflower seeds. J Anim Sci 2006; 84:997-1003. [PMID: 16543578 DOI: 10.2527/2006.844997x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Two experiments were conducted to determine the effect of maternal lipid supplementation on the immune response to antigenic challenge in suckling calves. In Exp. 1, beginning 1 d postpartum, 18 primiparous crossbred beef cows were fed Foxtail millet hay and a low-fat (control) supplement or a supplement containing cracked, high-linoleate safflower seed in individual feeding stanchions until d 40 of lactation. The diets were formulated to provide similar quantities of N and TDN, and the linoleate diet was formulated to contain 5% of DMI as fat. Calves were injected s.c. with 15 mg of antigen (ovalbumin) at d 21 and again at d 35 of age. To measure the total serum antibody production in response to the antigen, blood samples were collected from the calves every 7 d via jugular venipuncture from d 14 to 42. Calves from linoleate-supplemented cows had a decrease (P = 0.04) in total antibody production in response to ovalbumin and appeared to have a delayed response to antigen challenge. Total antibody production increased (P < 0.001) after secondary exposure to ovalbumin. In Exp. 2, 36 Angus x Gelbvieh beef cows that were nutritionally managed to achieve a BCS of 4 or 6 at parturition were used to determine the effects of prepartum energy balance and postpartum lipid supplementation on the passive transfer of immunoglobulins and the immune response to antigenic challenge in their calves. Beginning at 3 d postpartum and continuing until d 60 of lactation, cows were fed hay and a low-fat control supplement or supplements consisting of either cracked, high-linoleate or high-oleate safflower seeds. Safflower seed supplements were formulated to provide 5% of DMI as fat. Calves were injected s.c. with 15 mg of ovalbumin at 21 d of age and again at 48 d of age. The antibody responses were determined in serum; cell-mediated immunity was assessed by intradermal antigen injection at 60 d of age. A trend was noted (P = 0.10) for calves suckling control-supplemented cows to have a greater response to antigen compared with calves from linoleate- and oleate-supplemented cows; however, no difference was observed among treatments (P = 0.86) in cell-mediated immune response. Postpartum oilseed supplementation in beef cows appears to decrease antibody production in response to antigenic challenge in suckling calves. However, BCS at parturition did not influence passive transfer of immunoglobulins in neonatal calves.
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Affiliation(s)
- S L Lake
- Department of Animal Science, University of Wyoming, Laramie, 82071-3684, USA
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Lake SL, Scholljegerdes EJ, Weston TR, Rule DC, Hess BW. Postpartum supplemental fat, but not maternal body condition score at parturition, affects plasma and adipose tissue fatty acid profiles of suckling beef calves1. J Anim Sci 2006; 84:1811-9. [PMID: 16775065 DOI: 10.2527/jas.2005-619] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Three-year-old Angus x Gelbvieh beef cows, which were nutritionally managed to achieve a BCS of 4 +/- 0.07 (479 +/- 36 kg of BW) or 6 +/- 0.07 (580 +/- 53 kg of BW) at parturition, were used in a 2-yr experiment (n = 36/yr) to determine the effects of maternal BCS at parturition and postpartum lipid supplementation on fatty acid profile of suckling calf plasma and adipose tissue. Beginning 3 d postpartum, cows within each BCS were assigned randomly to 1 of 3 treatments in which cows were all fed hay and either a low-fat (control) supplement or supplements with either high-linoleate cracked safflower seeds (linoleate) or high-oleate cracked safflower seeds (oleate) until d 61 of lactation. Diets were formulated to be isonitrogenous and isocaloric, and safflower seed supplements were provided to achieve 5% of DMI as fat. Total concentration of fatty acids in plasma did not differ (P = 0.48) due to maternal BCS at parturition. Percentage of 20:5n-3 in plasma tended (P = 0.06) to be greater for calves suckling cows with a BCS of 6 at parturition. No other differences (P = 0.12 to 0.99) were noted in calf plasma fatty acid profile due to maternal BCS at parturition. Likewise, no differences were detected for total fatty acid concentration (P = 0.88) in calf adipose tissue due to maternal BCS at parturition. Weight percentage of 14:1 (P = 0.001) was greatest in adipose tissue of calves suckling cows fed control and oleate; however, the percentages of 14:0, 15:0, 16:0, 16:1, 17:0, and 18:3n-3 were greater (P < 0.001) in adipose tissue from calves suckling cows fed control compared with calves suckling cows fed linoleate or oleate. Percentages of 18:0, 18:1trans-11, 18:2n-6, and cis-9, trans-11 CLA were greater (P < 0.001) in adipose tissue from calves suckling cows fed linoleate compared with calves suckling cows fed control and oleate. Calves suckling cows fed oleate had greater (P < 0.001) percentages of 18:1trans-9, 18:1trans-10, and 18:1cis-9 in adipose tissue than calves suckling cows fed control or linoleate. Calf plasma and adipose tissue fatty acid profiles were reflective of milk fatty acids. Because fatty acids play an important role in metabolic regulatory functions, changes in milk fatty acid profile should be considered when beef cows are fed lipid supplements.
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Affiliation(s)
- S L Lake
- Department of Animal Science, University of Wyoming, Laramie 82071-3684
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