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Hutchinson AL, Liddle DM, Monk JM, Ma DWL, Robinson LE. n-3 and n-6 Polyunsaturated Fatty Acids Modulate Macrophage-Myocyte Inflammatory Crosstalk and Improve Myocyte Insulin Sensitivity. Nutrients 2024; 16:2086. [PMID: 38999834 PMCID: PMC11243049 DOI: 10.3390/nu16132086] [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: 06/07/2024] [Revised: 06/25/2024] [Accepted: 06/26/2024] [Indexed: 07/14/2024] Open
Abstract
In obesity, circulating saturated fatty acids (SFAs) and inflammatory cytokines interfere with skeletal muscle insulin signaling, leading to whole body insulin resistance. Further, obese skeletal muscle is characterized by macrophage infiltration and polarization to the inflammatory M1 phenotype, which is central to the development of local inflammation and insulin resistance. While skeletal muscle-infiltrated macrophage-myocyte crosstalk is exacerbated by SFA, the effects of other fatty acids, such as n-3 and n-6 polyunsaturated fatty acids (PUFAs), are less studied. Thus, the objective of this study was to determine the effects of long-chain n-3 and n-6 PUFAs on macrophage M1 polarization and subsequent effects on myocyte inflammation and metabolic function compared to SFA. Using an in vitro model recapitulating obese skeletal muscle cells, differentiated L6 myocytes were cultured for 24 h with RAW 264.7 macrophage-conditioned media (MCM), followed by insulin stimulation (100 nM, 20 min). MCM was generated by pre-treating macrophages for 24 h with 100 μM palmitic acid (16:0, PA-control), arachidonic acid (20:4n-6, AA), or docosahexaenoic acid (22:6n-3, DHA). Next, macrophage cultures were stimulated with a physiological dose (10 ng/mL) of lipopolysaccharide for an additional 12 h to mimic in vivo obese endotoxin levels. Compared to PA, both AA and DHA reduced mRNA expression and/or secreted protein levels of markers for M1 (TNFα, IL-6, iNOS; p < 0.05) and increased those for M2 (IL-10, TGF-β; p < 0.05) macrophage polarization. In turn, AA- and DHA-derived MCM reduced L6 myocyte-secreted cytokines (TNFα, IL-6; p < 0.05) and chemokines (MCP-1, MIP-1β; p < 0.05). Only AA-derived MCM increased L6-myocyte phosphorylation of Akt (p < 0.05), yet this was inconsistent with improved insulin signaling, as only DHA-derived MCM improved L6 myocyte glucose uptake (p < 0.05). In conclusion, dietary n-3 and n-6 PUFAs may be a useful strategy to modulate macrophage-myocyte inflammatory crosstalk and improve myocyte insulin sensitivity in obesity.
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Affiliation(s)
| | | | | | | | - Lindsay E. Robinson
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, ON N1G 2W1, Canada (J.M.M.); (D.W.L.M.)
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Luo S, Hou H, Wang Y, Li Y, Zhang L, Zhang H, Jin Q, Wu G, Wang X. Effects of omega-3, omega-6, and total dietary polyunsaturated fatty acid supplementation in patients with atherosclerotic cardiovascular disease: a systematic review and meta-analysis. Food Funct 2024; 15:1208-1222. [PMID: 38224465 DOI: 10.1039/d3fo02522e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2024]
Abstract
Background: Uncertainty exists about the link between omega-3 fatty acid, omega-6 fatty acid, and total polyunsaturated fatty acid (PUFA) intake and mortality in atherosclerotic cardiovascular disease (ASCVD) patients, and no meta-analyses summarize the relationship between these various types of PUFAs and ASCVD. Methods: Web of Science, PubMed, EBSCO and Cochrane Library up to November 30, 2022 were searched for prospective randomized controlled studies investigating the relationships among omega-3, omega-6, and PUFA intake and mortality and cardiovascular events in ASCVD patients. This study has been registered at PROSPERO (No. CRD42023407566). Results: This meta-analysis included 21 publications from 17 studies involving 40 861 participants published between 1965 and 2022. In ASCVD patients, omega-3 may lower all-cause mortality (RR: 0.90, 95% CI [0.83, 0.98], I2 = 8%), CVD mortality (RR: 0.82, 95% CI [0.73, 0.91], I2 = 34%) and CVD events (RR: 0.90, 95% CI [0.86, 0.93], I2 = 79%). Subgroup analyses showed that EPA or EPA ethyl ester supplementation reduced CVD events, while the mixture of EPA and DHA had no significant impact. Long-chain omega-3 consumption of 1.0-4.0 g per d reduced death risk by 3.5% for each 1 g per d increase. Omega-6 and PUFA had no significant effect on mortality or CVD events, with low-quality evidence and significant heterogeneity. Conclusions: omega-3 intake is associated with a reduced risk of all-cause mortality, CVD mortality, and CVD events in ASCVD patients, while omega-6 or total PUFA intake showed no significant association. Increasing the omega-3 intake by 1 g per d resulted in a 3.5% decrease in the risk of death. These findings support the recommendation of supplements with omega-3 fatty acids for the secondary prevention of ASCVD.
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Affiliation(s)
- Siqi Luo
- State Key Laboratory of Food Science and Resources, School of Food Science and Technology, National Engineering Research Center for Functional Food, International Joint Research Laboratory for Lipid Nutrition and Safety, Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, Wuxi, China.
| | - Hongmei Hou
- Department of Neonatology, The Affiliated Wuxi Children's Hospital of Jiangnan University, Wuxi, China
| | - Yongjin Wang
- State Key Laboratory of Food Science and Resources, School of Food Science and Technology, National Engineering Research Center for Functional Food, International Joint Research Laboratory for Lipid Nutrition and Safety, Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, Wuxi, China.
| | - Yun Li
- Department of Neonatology, The Affiliated Wuxi Children's Hospital of Jiangnan University, Wuxi, China
| | - Le Zhang
- Department of Neonatology, The Affiliated Wuxi Children's Hospital of Jiangnan University, Wuxi, China
| | - Hui Zhang
- State Key Laboratory of Food Science and Resources, School of Food Science and Technology, National Engineering Research Center for Functional Food, International Joint Research Laboratory for Lipid Nutrition and Safety, Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, Wuxi, China.
| | - Qingzhe Jin
- State Key Laboratory of Food Science and Resources, School of Food Science and Technology, National Engineering Research Center for Functional Food, International Joint Research Laboratory for Lipid Nutrition and Safety, Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, Wuxi, China.
| | - Gangcheng Wu
- State Key Laboratory of Food Science and Resources, School of Food Science and Technology, National Engineering Research Center for Functional Food, International Joint Research Laboratory for Lipid Nutrition and Safety, Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, Wuxi, China.
| | - Xingguo Wang
- State Key Laboratory of Food Science and Resources, School of Food Science and Technology, National Engineering Research Center for Functional Food, International Joint Research Laboratory for Lipid Nutrition and Safety, Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, Wuxi, China.
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Kholodenko IV, Yarygin KN. Hepatic Macrophages as Targets for the MSC-Based Cell Therapy in Non-Alcoholic Steatohepatitis. Biomedicines 2023; 11:3056. [PMID: 38002056 PMCID: PMC10669188 DOI: 10.3390/biomedicines11113056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2023] [Revised: 11/02/2023] [Accepted: 11/03/2023] [Indexed: 11/26/2023] Open
Abstract
Non-alcoholic steatohepatitis (NASH) is a serious public health issue associated with the obesity pandemic. Obesity is the main risk factor for the non-alcoholic fatty liver disease (NAFLD), which progresses to NASH and then to end-stage liver disease. Currently, there are no specific pharmacotherapies of NAFLD/NASH approved by the FDA or other national regulatory bodies and the treatment includes lifestyle adjustment and medicines for improving lipid metabolism, enhancing sensitivity to insulin, balancing oxidation, and counteracting fibrosis. Accordingly, further basic research and development of new therapeutic approaches are greatly needed. Mesenchymal stem cells (MSCs) and MSC-derived extracellular vesicles prevent induced hepatocyte death in vitro and attenuate NASH symptoms in animal models of the disease. They interact with hepatocytes directly, but also target other liver cells, including Kupffer cells and macrophages recruited from the blood flow. This review provides an update on the pathogenesis of NAFLD/NASH and the key role of macrophages in the development of the disease. We examine in detail the mechanisms of the cross-talk between the MSCs and the macrophages, which are likely to be among the key targets of MSCs and their derivatives in the course of NAFLD/NASH cell therapy.
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Affiliation(s)
- Irina V. Kholodenko
- Laboratory of Cell Biology, Orekhovich Institute of Biomedical Chemistry, 119121 Moscow, Russia;
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Immune regulation of poly unsaturated fatty acids and free fatty acid receptor 4. J Nutr Biochem 2023; 112:109222. [PMID: 36402250 DOI: 10.1016/j.jnutbio.2022.109222] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2021] [Revised: 09/24/2022] [Accepted: 11/10/2022] [Indexed: 11/19/2022]
Abstract
Fatty acid metabolism contributes to energy supply and plays an important role in regulating immunity. Free fatty acids (FFAs) bind to free fatty acid receptors (FFARs) on the cell surface and mediate effects through the intra-cellular FFAR signaling pathways. FFAR4, also known as G-protein coupled receptor 120 (GPR120), has been identified as the primary receptor of omega-3 polyunsaturated fatty acids (ω-3 PUFAs). FFAR4 is a promising target for treating metabolic and inflammatory disorders due to its immune regulatory functions and the discovery of highly selective and efficient agonists. This review summarizes the reported immune regulatory functions of ω-3 PUFAs and FFAR4 in immune cells and immune-related diseases. We also speculate possible involvements of ω-3 PUFAs and FFAR4 in other types of inflammatory disorders.
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Olona A, Leishman S, Anand PK. The NLRP3 inflammasome: regulation by metabolic signals. Trends Immunol 2022; 43:978-989. [PMID: 36371361 DOI: 10.1016/j.it.2022.10.003] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Revised: 10/05/2022] [Accepted: 10/08/2022] [Indexed: 11/10/2022]
Abstract
Macrophages undergo profound metabolic reprogramming upon sensing infectious and sterile stimuli. This metabolic shift supports and regulates essential innate immune functions, including activation of the NLRP3 inflammasome. Within distinct metabolic networks, key enzymes play pivotal roles to control flux restraining detrimental inflammasome signaling. However, depending on the metabolic cues, specific enzymes and metabolites result in inflammasome activation outcomes which contrast other metabolic steps in the pathway. We posit that understanding which metabolic steps commit to discrete inflammasome fates will broaden our understanding of metabolic checkpoints to maintain homeostasis and offer better therapeutic options in human disease.
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Affiliation(s)
- Antoni Olona
- Department of Infectious Disease, Imperial College London, London, W12 0NN, UK; Program in Cardiovascular and Metabolic Disorders, and Centre for Computational Biology, Duke-NUS Medical School, Singapore
| | - Stuart Leishman
- Department of Infectious Disease, Imperial College London, London, W12 0NN, UK
| | - Paras K Anand
- Department of Infectious Disease, Imperial College London, London, W12 0NN, UK.
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da Silva Batista E, Nakandakari SCBR, Ramos da Silva AS, Pauli JR, Pereira de Moura L, Ropelle ER, Camargo EA, Cintra DE. Omega-3 pleiad: The multipoint anti-inflammatory strategy. Crit Rev Food Sci Nutr 2022; 64:4817-4832. [PMID: 36382659 DOI: 10.1080/10408398.2022.2146044] [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] [Indexed: 11/17/2022]
Abstract
Omega 3 (ω3) fatty acids have been described since the 1980s as promising anti-inflammatory substances. Prostaglandin and leukotriene modulation were exhaustively explored as the main reason for ω3 beneficial outcomes. However, during the early 2000s, after the human genome decoding advent, the nutrigenomic approaches exhibited an impressive plethora of ω3 targets, now under the molecular point of view. Different G protein-coupled receptors (GPCRs) recognizing ω3 and its derivatives appear to be responsible for blocking inflammation and insulin-sensitizing effects. A new class of ω3-derived substances, such as maresins, resolvins, and protectins, increases ω3 actions. Inflammasome disruption, the presence of GPR120 on immune cell surfaces, and intracellular crosstalk signaling mediated by PPARγ compose the last discoveries regarding the multipoint anti-inflammatory targets for this nutrient. This review shows a detailed mechanistic proposal to understand ω3 fatty acid action over the inflammatory environment in the background of several chronic diseases.
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Affiliation(s)
- Ellencristina da Silva Batista
- Graduate Program of Health Sciences (PPGCS), Federal University of Sergipe, Aracaju, Sergipe, Brazil
- Nutritional Genomics Laboratory, LabGeN, School of Applied Sciences, UNICAMP, São Paulo, Brazil
- Nutrigenomics and Lipids Research Center, CELN, School of Applied Sciences, UNICAMP, São Paulo, Brazil
- Nutrition Department, Federal University of Sergipe, Lagarto, Sergipe, Brazil
| | - Susana Castelo Branco Ramos Nakandakari
- Nutritional Genomics Laboratory, LabGeN, School of Applied Sciences, UNICAMP, São Paulo, Brazil
- Nutrigenomics and Lipids Research Center, CELN, School of Applied Sciences, UNICAMP, São Paulo, Brazil
| | | | - José Rodrigo Pauli
- Nutrigenomics and Lipids Research Center, CELN, School of Applied Sciences, UNICAMP, São Paulo, Brazil
- Laboratory of Molecular Biology of Exercise, School of Applied Sciences, UNICAMP, São Paulo, Brazil
| | - Leandro Pereira de Moura
- Laboratory of Molecular Biology of Exercise, School of Applied Sciences, UNICAMP, São Paulo, Brazil
| | - Eduardo Rochete Ropelle
- Nutrigenomics and Lipids Research Center, CELN, School of Applied Sciences, UNICAMP, São Paulo, Brazil
- Laboratory of Molecular Biology of Exercise, School of Applied Sciences, UNICAMP, São Paulo, Brazil
| | - Enilton A Camargo
- Graduate Program of Health Sciences (PPGCS), Federal University of Sergipe, Aracaju, Sergipe, Brazil
- Department of Physiology, Federal University of Sergipe, São Cristóvão, Sergipe, Brazil
| | - Dennys Esper Cintra
- Nutritional Genomics Laboratory, LabGeN, School of Applied Sciences, UNICAMP, São Paulo, Brazil
- Nutrigenomics and Lipids Research Center, CELN, School of Applied Sciences, UNICAMP, São Paulo, Brazil
- OCRC - Obesity and Comorbidities Research Center, UNICAMP, São Paulo, Brazil
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7
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Abstract
The overarching objective is to review how early exposure to adversity interacts with inflammation to alter brain maturation. Both adversity and inflammation are significant risk factors for psychopathology. Literature relevant to the effects of adversity in children and adolescents on brain development is reviewed. These studies are supported by research in animals exposed to species-relevant stressors during development. While it is known that exposure to adversity at any age increases inflammation, the effects of inflammation are exacerbated at developmental stages when the immature brain is uniquely sensitive to experiences. Microglia play a vital role in this process, as they scavenge cellular debris and prune synapses to optimize performance. In essence, microglia modify the synapse to match environmental demands, which is necessary for someone with a history of adversity. Overall, by piecing together clinical and preclinical research areas, what emerges is a picture of how adversity uniquely sculpts the brain. Microglia interactions with the inhibitory neurotransmitter GABA (specifically, the subtype expressing parvalbumin) are discussed within contexts of development and adversity. A review of inflammation markers in individuals with a history of abuse is combined with preclinical studies to describe their effects on maturation. Inconsistencies within the literature are discussed, with a call for standardizing methodologies relating to the age of assessing adversity effects, measures to quantify stress and inflammation, and more brain-based measures of biochemistry. Preclinical studies pave the way for interventions using anti-inflammation-based agents (COX-2 inhibitors, CB2 agonists, meditation/yoga) by identifying where, when, and how the developmental trajectory goes awry.
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8
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Fletcher P, Hamilton RF, Rhoderick JF, Postma B, Buford M, Pestka JJ, Holian A. Dietary Docosahexaenoic Acid as a Potential Treatment for Semi-acute and Chronic Particle-Induced Pulmonary Inflammation in Balb/c Mice. Inflammation 2021; 45:677-694. [PMID: 34655011 DOI: 10.1007/s10753-021-01576-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Revised: 09/30/2021] [Accepted: 10/01/2021] [Indexed: 10/20/2022]
Abstract
Acute and chronic inflammation are vital contributing factors to pulmonary diseases which can be triggered by exposure to occupational and man-made particles; however, there are no established treatments. One potential treatment shown to have anti-inflammatory capabilities is the dietary supplement docosahexaenoic acid (DHA), an omega-3 polyunsaturated fatty acid found in fish oil. DHA's anti-inflammatory mechanisms are unclear for particle-induced inflammation; therefore, this study evaluated DHA as a prophylactic treatment for semi-acute and chronic particle-induced inflammation in vivo. Balb/c mice were fed a control or 1% DHA diet and exposed to dispersion media, an inflammatory multi-walled carbon nanotube (MWCNT), or crystalline silica (SiO2) either once (semi-acute) or once a week for 4 weeks (chronic). The hypothesis was that DHA will decrease pulmonary inflammatory markers in response to particle-induced inflammation. Results indicated that DHA had a trending anti-inflammatory effect in mice exposed to MWCNT. There was a general decrease in inflammatory signals within the lung lavage fluid and upregulation of M2c macrophage gene expression in the spleen tissue. In contrast, mice exposed to SiO2 while on the DHA diet significantly increased most inflammatory markers. However, DHA stabilized the phagolysosomal membrane upon prolonged treatment. This indicated that DHA treatment may depend upon certain inflammatory particle exposures as well as the length of the exposure.
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Affiliation(s)
- Paige Fletcher
- Department of Biomedical and Pharmaceutical Sciences, Center for Environmental Health Sciences, University of Montana, Missoula, MT, USA.
| | - Raymond F Hamilton
- Department of Biomedical and Pharmaceutical Sciences, Center for Environmental Health Sciences, University of Montana, Missoula, MT, USA
| | - Joseph F Rhoderick
- Department of Biomedical and Pharmaceutical Sciences, Center for Environmental Health Sciences, University of Montana, Missoula, MT, USA
| | - Britten Postma
- Department of Biomedical and Pharmaceutical Sciences, Center for Environmental Health Sciences, University of Montana, Missoula, MT, USA
| | - Mary Buford
- Department of Biomedical and Pharmaceutical Sciences, Center for Environmental Health Sciences, University of Montana, Missoula, MT, USA
| | - James J Pestka
- Department of Food Science and Human Nutrition, Institute for Integrative Toxicology, Michigan State University, East Lansing, MI, USA
| | - Andrij Holian
- Department of Biomedical and Pharmaceutical Sciences, Center for Environmental Health Sciences, University of Montana, Missoula, MT, USA
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Sears B, Saha AK. Dietary Control of Inflammation and Resolution. Front Nutr 2021; 8:709435. [PMID: 34447777 PMCID: PMC8382877 DOI: 10.3389/fnut.2021.709435] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Accepted: 07/13/2021] [Indexed: 12/18/2022] Open
Abstract
The healing of any injury requires a dynamic balance of initiation and resolution of inflammation. This hypothesis-generating review presents an overview of the various nutrients that can act as signaling agents to modify the metabolic responses essential for the optimal healing of injury-induced inflammation. In this hypothesis-generating review, we describe a defined nutritional program consisting of an integrated interaction of a calorie-restricted anti-inflammatory diet coupled with adequate levels of omega-3 fatty acids and sufficient levels of dietary polyphenols that can be used in clinical trials to treat conditions associated with insulin resistance. Each dietary intervention works in an orchestrated systems-based approach to reduce, resolve, and repair the tissue damage caused by any inflammation-inducing injury. The orchestration of these specific nutrients and their signaling metabolites to facilitate healing is termed the Resolution Response. The final stage of the Resolution Response is the activation of intracellular 5' adenosine monophosphate-activated protein kinase (AMPK), which is necessary to repair tissue damaged by the initial injury-induced inflammation. The dietary optimization of the Resolution Response can be personalized to the individual by using standard blood markers. Once each of those markers is in their appropriate ranges, activation of intracellular AMPK will be facilitated. Finally, we outline how the resulting activation of AMPK will affect a diverse number of other intercellular signaling systems leading to an extended healthspan.
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Affiliation(s)
- Barry Sears
- Inflammation Research Foundation, Peabody, MA, United States
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Kökten T, Hansmannel F, Ndiaye NC, Heba AC, Quilliot D, Dreumont N, Arnone D, Peyrin-Biroulet L. Calorie Restriction as a New Treatment of Inflammatory Diseases. Adv Nutr 2021; 12:1558-1570. [PMID: 33554240 PMCID: PMC8321869 DOI: 10.1093/advances/nmaa179] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Revised: 11/16/2020] [Accepted: 12/21/2020] [Indexed: 02/06/2023] Open
Abstract
Immoderate calorie intake coupled with a sedentary lifestyle are major determinants of health issues and inflammatory diseases in modern society. The balance between energy consumption and energy expenditure is critical for longevity. Excessive energy intake and adiposity cause systemic inflammation, whereas calorie restriction (CR) without malnutrition, exerts a potent anti-inflammatory effect. The objective of this review was to provide an overview of different strategies used to reduce calorie intake, discuss physiological mechanisms by which CR might lead to improved health outcomes, and summarize the present knowledge about inflammatory diseases. We discuss emerging data of observational studies and randomized clinical trials on CR that have been shown to reduce inflammation and improve human health.
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Affiliation(s)
- Tunay Kökten
- Université de Lorraine, Inserm U1256 NGERE (Nutrition—Genetics and Exposure to Environmental Risks), Nancy, France
| | - Franck Hansmannel
- Université de Lorraine, Inserm U1256 NGERE (Nutrition—Genetics and Exposure to Environmental Risks), Nancy, France
| | - Ndeye Coumba Ndiaye
- Université de Lorraine, Inserm U1256 NGERE (Nutrition—Genetics and Exposure to Environmental Risks), Nancy, France
| | - Anne-Charlotte Heba
- Université de Lorraine, Inserm U1256 NGERE (Nutrition—Genetics and Exposure to Environmental Risks), Nancy, France
| | - Didier Quilliot
- Université de Lorraine, Inserm U1256 NGERE (Nutrition—Genetics and Exposure to Environmental Risks), Nancy, France
- Université de Lorraine, Centre Hospitalier Régional Universitaire (CHRU)-Nancy, Department of Diabetology-Endocrinology-Nutrition, Nancy, France
| | - Natacha Dreumont
- Université de Lorraine, Inserm U1256 NGERE (Nutrition—Genetics and Exposure to Environmental Risks), Nancy, France
| | - Djésia Arnone
- Université de Lorraine, Inserm U1256 NGERE (Nutrition—Genetics and Exposure to Environmental Risks), Nancy, France
| | - Laurent Peyrin-Biroulet
- Université de Lorraine, Inserm U1256 NGERE (Nutrition—Genetics and Exposure to Environmental Risks), Nancy, France
- Université de Lorraine, Centre Hospitalier Régional Universitaire (CHRU)-Nancy, Department of Gastroenterology, Nancy, France
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Tsai YW, Lu CH, Chang RCA, Hsu YP, Ho LT, Shih KC. Palmitoleic acid ameliorates palmitic acid-induced proinflammation in J774A.1 macrophages via TLR4-dependent and TNF-α-independent signallings. Prostaglandins Leukot Essent Fatty Acids 2021; 169:102270. [PMID: 33930845 DOI: 10.1016/j.plefa.2021.102270] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Revised: 02/17/2021] [Accepted: 03/22/2021] [Indexed: 12/27/2022]
Abstract
Adipose tissue resident macrophages play an important role in the regulation of the inflammatory response. Monounsaturated fatty acids assist in the prevention of cardiovascular diseases via an anti-inflammatory effect. However, the mechanisms by which monounsaturated fatty acids, such as palmitoleic acid, regulate the inflammatory response has not been well investigated. In this study, we found that a high concentration of palmitic acid induced J774A.1 murine macrophages toward a pro-inflammatory state, possibly through the activation of the TLR2 or TLR4 genes, and their downstream signaling pathways. In contrast, palmitoleic acid induced a protective effect against inflammation in macrophage of non-obese rodents by inducing an alternative activation pathway via reducing TLR2 or TLR4 signaling. This study indicates that the balance of palmitic acid (saturated fatty acid) and palmitoleic acid (monounsaturated fatty acid) effects macrophage activation. The potential therapeutic impact of palmitoleic acid to ameliorate non-obese-mediated inflammation warrants further investigation.
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Affiliation(s)
- Yi-Wen Tsai
- Department of Family Medicine, Chang Gung Memorial Hospital, Keelung, and Chang Gung University College of Medicine, No.259, Wenhua 1st Rd., Guishan Dist., Taoyuan City 33302, Taiwan; Graduate Institute of Medical Sciences, National Defence Medical Canter, No.161, Sec. 6, Minquan E. Rd., Neihu Dist., Taipei City 11490, Taiwan
| | - Chieh-Hua Lu
- Division of Endocrinology and Metabolism, Department of Medicine, Tri-Service General Hospital, School of Medicine, National Defense Medical Center, No.325, Sec.2, Chenggong Rd., Neihu District, Taipei City 11490, Taiwan
| | - Richard Cheng-An Chang
- Department of Developmental and Cell Biology, University of California, University of California, Irvine, CA 92697-2300, United States
| | - Yung-Pei Hsu
- Departments of Medical Research, and Internal Medicine, Taipei Veterans General Hospital, No.201, Sec. 2, Shipai Rd., Beitou District, Taipei City 11217, Taiwan
| | - Low-Tone Ho
- Departments of Medical Research, and Internal Medicine, Taipei Veterans General Hospital, No.201, Sec. 2, Shipai Rd., Beitou District, Taipei City 11217, Taiwan; School of Medicine, National Yang-Ming University, No.155, Sec.2, Linong Street, Taipei, 112 Taiwan
| | - Kuang-Chung Shih
- Division of Endocrinology and Metabolism, Department of Medicine, Tri-Service General Hospital, School of Medicine, National Defense Medical Center, No.325, Sec.2, Chenggong Rd., Neihu District, Taipei City 11490, Taiwan; School of Medicine, National Yang-Ming University, No.155, Sec.2, Linong Street, Taipei, 112 Taiwan; Division of Endocrinology and Metabolism, Department of Medicine, Cheng-Hsin General Hospital, No.45, Cheng Hsin St., Beitou, Taipei 112, Taiwan.
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12
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Omega-3 fatty acids ameliorate vascular inflammation: A rationale for their atheroprotective effects. Atherosclerosis 2021; 324:27-37. [PMID: 33812168 DOI: 10.1016/j.atherosclerosis.2021.03.003] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/18/2020] [Revised: 02/17/2021] [Accepted: 03/04/2021] [Indexed: 11/24/2022]
Abstract
BACKGROUND AND AIMS Clinical trials have demonstrated reductions in major adverse cardiovascular events with purified high-dose eicosapentaenoic acid (EPA), independent of effects on lipids. We aimed to investigate whether omega-3 fatty acids reduce vascular inflammation, a critical mediator of atherosclerosis, and hypothesised that EPA is superior to docosahexaenoic acid (DHA). METHODS In a double-blind randomised controlled trial and cell-culture study, 40 healthy volunteers were supplemented with 4 g daily of either EPA, DHA, fish oil (2:1 EPA:DHA), or placebo for 30 days. Serum was incubated with TNF-stimulated human umbilical vein endothelial cells (HUVECs), and markers of acute vascular inflammation (AVI) were measured. The effects of EPA, DHA (600 mg/kg/day), olive oil, or no treatment were also measured in preclinical models of [1] AVI using a periarterial collar (C57Bl/6J; n = 40 mice) and [2] atherosclerosis where ApoE-/- mice (n = 40) were fed a 16-week atherogenic diet. RESULTS EPA supplementation reduced expression of C-C motif chemokine ligand 2 (CCL2) by 25% compared to placebo (p = 0.03). In the AVI model, EPA reduced vascular expression of VCAM1 by 43% (p = 0.02) and CCL2 by 41% (p = 0.03). Significant inverse correlations were observed between EPA levels and vascular expression of VCAM1 (r = -0.56, p = 0.001) and CCL2 (r = -0.56, p = 0.001). In ApoE-/- mice, EPA reduced aortic expression of Il1b by 44% (p = 0.04) and Tnf by 49% (p = 0.04), with similar inverse correlations between EPA levels and both Il1b (r = -0.63, p = 0.009) and Tnf (r = -0.50, p = 0.04). CONCLUSIONS Supplementation with EPA, more so than DHA, ameliorates acute and chronic vascular inflammation, providing a rationale for the cardiovascular benefit observed with high dose omega-3 fatty acid administration.
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13
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Fletcher P, Hamilton RF, Rhoderick JF, Pestka JJ, Holian A. Docosahexaenoic acid impacts macrophage phenotype subsets and phagolysosomal membrane permeability with particle exposure. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART A 2021; 84:152-172. [PMID: 33148135 PMCID: PMC7855733 DOI: 10.1080/15287394.2020.1842826] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Inhalation of particles results in pulmonary inflammation; however, treatments are currently lacking. Docosahexaenoic acid (DHA) is an omega-3 polyunsaturated fatty acid shown to exhibit anti-inflammatory capabilities. The impact of DHA on particle-induced inflammation is unclear; therefore, the aim of this study was to examine the hypothesis that DHA downregulates macrophage inflammatory responses by altering phagolysosomal membrane permeability (LMP) and shifting macrophage phenotype. Isolated Balb/c alveolar macrophages (AM) were polarized into M1, M2a, M2b, or M2c phenotypes in vitro, treated with DHA, and exposed to a multi-walled carbon nanotube (MWNCT) or crystalline silica (SiO2). Results showed minimal cytotoxicity, robust effects for silica particle uptake, and LMP differences between phenotypes. Docosahexaenoic acid prevented these effects to the greatest extent in M2c phenotype. To determine if DHA affected inflammation similarly in vivo, Balb/c mice were placed on a control or 1% DHA diet for 3 weeks, instilled with the same particles, and assessed 24 hr following instillation. Data demonstrated that in contrast to in vitro findings, DHA increased pulmonary inflammation and LMP. These results suggest that pulmonary responses in vivo may not necessarily be predicted from single-cell responses in vitro.
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Affiliation(s)
- Paige Fletcher
- Department of Biomedical and Pharmaceutical Sciences, Center for Environmental Health Sciences, University of Montana, Missoula, MT, United States
| | - Raymond F. Hamilton
- Department of Biomedical and Pharmaceutical Sciences, Center for Environmental Health Sciences, University of Montana, Missoula, MT, United States
| | - Joseph F. Rhoderick
- Department of Biomedical and Pharmaceutical Sciences, Center for Environmental Health Sciences, University of Montana, Missoula, MT, United States
| | - James J. Pestka
- Department of Food Science and Human Nutrition, Institute for Integrative Toxicology, Michigan State University, East Lansing, MI, United States
| | - Andrij Holian
- Department of Biomedical and Pharmaceutical Sciences, Center for Environmental Health Sciences, University of Montana, Missoula, MT, United States
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14
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López-Tenorio II, Domínguez-López A, Miliar-García Á, Escalona-Cardoso GN, Real-Sandoval SA, Gómez-Alcalá A, Jaramillo-Flores ME. Modulation of the mRNA of the Nlrp3 inflammasome by Morin and PUFAs in an obesity model induced by a high-fat diet. Food Res Int 2020; 137:109706. [DOI: 10.1016/j.foodres.2020.109706] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2020] [Revised: 08/22/2020] [Accepted: 09/06/2020] [Indexed: 01/11/2023]
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15
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Wen Y, Lambrecht J, Ju C, Tacke F. Hepatic macrophages in liver homeostasis and diseases-diversity, plasticity and therapeutic opportunities. Cell Mol Immunol 2020; 18:45-56. [PMID: 33041338 DOI: 10.1038/s41423-020-00558-8] [Citation(s) in RCA: 294] [Impact Index Per Article: 73.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Accepted: 09/14/2020] [Indexed: 02/06/2023] Open
Abstract
Macrophages, which are key cellular components of the liver, have emerged as essential players in the maintenance of hepatic homeostasis and in injury and repair processes in acute and chronic liver diseases. Upon liver injury, resident Kupffer cells (KCs) sense disturbances in homeostasis, interact with hepatic cell populations and release chemokines to recruit circulating leukocytes, including monocytes, which subsequently differentiate into monocyte-derived macrophages (MoMϕs) in the liver. Both KCs and MoMϕs contribute to both the progression and resolution of tissue inflammation and injury in various liver diseases. The diversity of hepatic macrophage subsets and their plasticity explain their different functional responses in distinct liver diseases. In this review, we highlight novel findings regarding the origins and functions of hepatic macrophages and discuss the potential of targeting macrophages as a therapeutic strategy for liver disease.
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Affiliation(s)
- Yankai Wen
- Department of Anesthesiology, McGovern Medical School, University of Texas Health Science Center at Houston, Houston, TX, USA
| | - Joeri Lambrecht
- Department of Hepatology and Gastroenterology, Charité University Medicine Berlin, Berlin, Germany
| | - Cynthia Ju
- Department of Anesthesiology, McGovern Medical School, University of Texas Health Science Center at Houston, Houston, TX, USA.
| | - Frank Tacke
- Department of Hepatology and Gastroenterology, Charité University Medicine Berlin, Berlin, Germany.
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16
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Alvarenga L, Cardozo LF, Borges NA, Lindholm B, Stenvinkel P, Shiels PG, Fouque D, Mafra D. Can nutritional interventions modulate the activation of the NLRP3 inflammasome in chronic kidney disease? Food Res Int 2020; 136:109306. [DOI: 10.1016/j.foodres.2020.109306] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Revised: 04/28/2020] [Accepted: 05/07/2020] [Indexed: 02/06/2023]
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17
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Charles-Messance H, Mitchelson KA, De Marco Castro E, Sheedy FJ, Roche HM. Regulating metabolic inflammation by nutritional modulation. J Allergy Clin Immunol 2020; 146:706-720. [DOI: 10.1016/j.jaci.2020.08.013] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Revised: 08/19/2020] [Accepted: 08/20/2020] [Indexed: 12/12/2022]
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18
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Wu KKL, Cheung SWM, Cheng KKY. NLRP3 Inflammasome Activation in Adipose Tissues and Its Implications on Metabolic Diseases. Int J Mol Sci 2020; 21:E4184. [PMID: 32545355 PMCID: PMC7312293 DOI: 10.3390/ijms21114184] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 06/05/2020] [Accepted: 06/09/2020] [Indexed: 02/06/2023] Open
Abstract
Adipose tissue is an active endocrine and immune organ that controls systemic immunometabolism via multiple pathways. Diverse immune cell populations reside in adipose tissue, and their composition and immune responses vary with nutritional and environmental conditions. Adipose tissue dysfunction, characterized by sterile low-grade chronic inflammation and excessive immune cell infiltration, is a hallmark of obesity, as well as an important link to cardiometabolic diseases. Amongst the pro-inflammatory factors secreted by the dysfunctional adipose tissue, interleukin (IL)-1β, induced by the NLR family pyrin domain-containing 3 (NLRP3) inflammasome, not only impairs peripheral insulin sensitivity, but it also interferes with the endocrine and immune functions of adipose tissue in a paracrine manner. Human studies indicated that NLRP3 activity in adipose tissues positively correlates with obesity and its metabolic complications, and treatment with the IL-1β antibody improves glycaemia control in type 2 diabetic patients. In mouse models, genetic or pharmacological inhibition of NLRP3 activation pathways or IL-1β prevents adipose tissue dysfunction, including inflammation, fibrosis, defective lipid handling and adipogenesis, which in turn alleviates obesity and its related metabolic disorders. In this review, we summarize both the negative and positive regulators of NLRP3 inflammasome activation, and its pathophysiological consequences on immunometabolism. We also discuss the potential therapeutic approaches to targeting adipose tissue inflammasome for the treatment of obesity and its related metabolic disorders.
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Affiliation(s)
| | | | - Kenneth King-Yip Cheng
- Department of Health Technology and Informatics, The Hong Kong Polytechnic University, Hong Kong, China; (K.K.-L.W.); (S.W.-M.C.)
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19
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Ramirez-Pedraza M, Fernández M. Interplay Between Macrophages and Angiogenesis: A Double-Edged Sword in Liver Disease. Front Immunol 2019; 10:2882. [PMID: 31921146 PMCID: PMC6927291 DOI: 10.3389/fimmu.2019.02882] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Accepted: 11/25/2019] [Indexed: 12/19/2022] Open
Abstract
During chronic liver disease, macrophages support angiogenesis, not only by secreting proangiogenic growth factors and matrix-remodeling proteases, but also by physically interacting with the sprouting vasculature to assist the formation of complex vascular networks. In the liver, macrophages acquire specific characteristics becoming Kupffer cells and working to ensure protection and immunotolerance. Angiogenesis is another double-edged sword in health and disease and it is the biggest ally of macrophages allowing its dissemination. Angiogenesis and fibrosis may occur in parallel in several tissues as macrophages co-localize with newly formed vessels and secrete cytokines, interleukins, and growth factors that will activate other cell types in the liver such as hepatic stellate cells and liver sinusoidal endothelial cells, promoting extracellular matrix accumulation and fibrogenesis. Vascular endothelial growth factor, placental growth factor, and platelet-derived growth factor are the leading secreted factors driving pathological angiogenesis and consequently increasing macrophage infiltration. Tumor development in the liver has been widely linked to macrophage-mediated chronic inflammation in which epidermal growth factors, STAT3 and NF-kβ are some of the most relevant signaling molecules involved. In this article, we review the link between macrophages and angiogenesis at molecular and cellular levels in chronic liver disease.
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Affiliation(s)
- Marta Ramirez-Pedraza
- Angiogenesis in Liver Disease Research Group, IDIBAPS Biomedical Research Institute, Hospital Clinic, University of Barcelona, Barcelona, Spain
| | - Mercedes Fernández
- Angiogenesis in Liver Disease Research Group, IDIBAPS Biomedical Research Institute, Hospital Clinic, University of Barcelona, Barcelona, Spain.,Biomedical Research Networking Center on Hepatic and Digestive Disease (CIBEREHD), Institute of Health Carlos III, Madrid, Spain
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20
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Rai RC. Host inflammatory responses to intracellular invaders: Review study. Life Sci 2019; 240:117084. [PMID: 31759040 DOI: 10.1016/j.lfs.2019.117084] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2019] [Revised: 11/14/2019] [Accepted: 11/15/2019] [Indexed: 12/13/2022]
Abstract
As soon as a pathogen invades through the physical barriers of its corresponding host, host mounts a series of protective immune response to get rid of the invading pathogen. Host's pattern recognition receptors (PRR), localized at the cellular surface, cytoplasm and also in the nucleus; recognises pathogen associated molecular patterns (PAMPs) and plays crucial role in directing the immune response to be specific. Inflammatory responses are among the earliest strategies to tackle the pathogen by the host and are tightly regulated by multiple molecular pathways. Inflammasomes are multi-subunit protein complex consisting of a receptor molecule viz. NLRP3, an adaptor molecule- Apoptosis-associated speck-like protein containing a CARD (ASC) and an executioner caspase. Upon infection and/or injury; inflammasome components assemble and oligomerizes leading to the auto cleavage of the pro-caspase-1 to its active form. The activated caspase-1 cleaves immature form of the pro-inflammatory cytokines to their mature form e.g. IL1-β and IL-18 which mount inflammatory response. Moreover, C-terminal end of the Gasdermin D molecule is also cleaved by the caspase-1. The activated N-terminal Gasdermin D molecule form pores in the infected cells leading to their pyroptosis. Hence, inflammasomes drive inflammation during infection and controls the establishment of the pathogen by mounting inflammatory response and activation of the pyroptotic cell death.
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Affiliation(s)
- Ramesh Chandra Rai
- International Centre for Genetic Engineering and Biotechnology, Aruna Asaf Ali Marg, New Delhi 110067, India.
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21
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Soto-Alarcón SA, Ortiz M, Orellana P, Echeverría F, Bustamante A, Espinosa A, Illesca P, Gonzalez-Mañán D, Valenzuela R, Videla LA. Docosahexaenoic acid and hydroxytyrosol co-administration fully prevents liver steatosis and related parameters in mice subjected to high-fat diet: A molecular approach. Biofactors 2019; 45:930-943. [PMID: 31454114 DOI: 10.1002/biof.1556] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Accepted: 08/01/2019] [Indexed: 12/13/2022]
Abstract
Attenuation of high-fat diet (HFD)-induced liver steatosis is accomplished by different nutritional interventions. Considering that the n-3 PUFA docosahexaenoic acid (DHA) modulates lipid metabolism and the antioxidant hydroxytyrosol (HT) diminishes oxidative stress underlying fatty liver, it is hypothesized that HFD-induced steatosis is suppressed by DHA and HT co-administration. Male C57BL/6J mice were fed a control diet (CD; 10% fat, 20% protein, 70% carbohydrates) or a HFD (60% fat, 20% protein, 20% carbohydrates) for 12 weeks, without and with supplementation of DHA (50 mg/kg/day), HT (5 mg/kg/day) or both. The combined DHA + HT protocol fully prevented liver steatosis and the concomitant pro-inflammatory state induced by HFD, with suppression of lipogenic and oxidative stress signaling, recovery of fatty acid oxidation capacity and enhancement in resolvin availability affording higher inflammation resolution capability. Abrogation of HFD-induced hepatic steatosis by DHA and HT co-administration represents a crucial therapeutic strategy eluding disease progression into stages lacking efficacious handling at present time.
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Affiliation(s)
| | - Macarena Ortiz
- Nutrition and Dietetics School, Faculty of Health Sciences, Catholic University of Maule, Curicó, Chile
| | - Paula Orellana
- Nutrition Department, Faculty of Medicine, University of Chile, Santiago, Chile
| | | | - Andrés Bustamante
- Nutrition Department, Faculty of Medicine, University of Chile, Santiago, Chile
| | - Alejandra Espinosa
- Department of Medical Technology, Faculty of Medicine, University of Chile, Santiago, Chile
| | - Paola Illesca
- Biochemistry Department, Faculty of Biochemistry, University of Litoral, Santa Fe, Argentina
| | | | - Rodrigo Valenzuela
- Nutrition Department, Faculty of Medicine, University of Chile, Santiago, Chile
| | - Luis A Videla
- Molecular and Clinical Pharmacology Program, Institute of Biomedical Science, Faculty of Medicine, University of Chile, Santiago, Chile
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22
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Balkrishna A, Sakat SS, Joshi K, Joshi K, Sharma V, Ranjan R, Bhattacharya K, Varshney A. Cytokines Driven Anti-Inflammatory and Anti-Psoriasis Like Efficacies of Nutraceutical Sea Buckthorn ( Hippophae rhamnoides) Oil. Front Pharmacol 2019; 10:1186. [PMID: 31680964 PMCID: PMC6797847 DOI: 10.3389/fphar.2019.01186] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Accepted: 09/13/2019] [Indexed: 12/28/2022] Open
Abstract
Psoriasis is a chronic inflammatory skin disease characterized by circumscribed, red, thickened plaques with overlying silvery white scales. It is associated with the release of pro-inflammatory mediators that lead to the development of edema and distress. Here we show the anti-inflammatory and anti-psoriatic efficacies of a neutraceutical sea buckthorn oil (SBKT) derived from the fruit pulp of Hippophae rhamnoides. Chemical analysis of the SBKT showed the presence of 16 major saturated, mono-, and polyunsaturated fatty acids components, imparting significant nutritional values. Efficacy of the SBKT in modulating psoriasis and associated inflammation was first tested in vitro using human monocytic (THP-1) cells. SBKT induced cytotoxicity at a dose of ≥25 µl/ml. Treatment of the lipopolysaccharide-stimulated THP-1 cells with SBKT subdued the enhanced release of intracellular reactive nitrogen species and expression of NF-κB protein, in a concentration-dependent manner. This was accompanied by a reduction in the release of downstream pro-inflammatory cytokines: Interleukin-1ß and interleukin-6. Tumor necrosis factor-α released in the stimulated THP-1 cells were also inhibited by SBKT dose of 5 µl/ml. In vivo oral and topical treatment with SBKT in the Carrageenan-stimulated paw edema model, showed a significant decrease in paw volume and edema. In the 12-O tetradecanoyl phorbol 13-acetate (TPA) stimulated CD-1 mice psoriasis-like model, concurrent oral and tropical SBKT treatments substantially reduced ear edema and ear biopsy weights. Histopathologically, significant reduction in ear epidermal thickness and skin lesion scores was observed in the SBKT-treated animals. In conclusion, SBKT showed anti-inflammatory and anti-psoriasis-like efficacies in healing chemical-induced inflammation and psoriasis. The possible mode of action of SBKT was found through inhibition of reactive nitrogen species, and downregulation of NF-κB protein and pro-inflammatory cytokines. Thus, the present data suggest that Sea buckthorn oil can be used as an anti-inflammatory and anti-psoriatic nutraceutical.
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Affiliation(s)
- Acharya Balkrishna
- Drug Discovery and Development Division, Patanjali Research Institute, Haridwar, India.,Department of Allied Sciences, University of Patanjali, Patanjali YogPeeth, Haridwar, India
| | - Sachin Shridhar Sakat
- Drug Discovery and Development Division, Patanjali Research Institute, Haridwar, India
| | - Kheemraj Joshi
- Drug Discovery and Development Division, Patanjali Research Institute, Haridwar, India
| | - Kamal Joshi
- Drug Discovery and Development Division, Patanjali Research Institute, Haridwar, India
| | - Vinay Sharma
- Drug Discovery and Development Division, Patanjali Research Institute, Haridwar, India
| | - Ravikant Ranjan
- Drug Discovery and Development Division, Patanjali Research Institute, Haridwar, India
| | - Kunal Bhattacharya
- Drug Discovery and Development Division, Patanjali Research Institute, Haridwar, India
| | - Anurag Varshney
- Drug Discovery and Development Division, Patanjali Research Institute, Haridwar, India.,Department of Allied Sciences, University of Patanjali, Patanjali YogPeeth, Haridwar, India
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23
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Wierenga KA, Wee J, Gilley KN, Rajasinghe LD, Bates MA, Gavrilin MA, Holian A, Pestka JJ. Docosahexaenoic Acid Suppresses Silica-Induced Inflammasome Activation and IL-1 Cytokine Release by Interfering With Priming Signal. Front Immunol 2019; 10:2130. [PMID: 31616405 PMCID: PMC6763728 DOI: 10.3389/fimmu.2019.02130] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Accepted: 08/23/2019] [Indexed: 12/16/2022] Open
Abstract
Occupational exposure to respirable crystalline silica (cSiO2) has been etiologically linked to human autoimmunity. Intranasal instillation with cSiO2 triggers profuse inflammation in the lung and onset of autoimmunity in lupus-prone mice; however, dietary supplementation with the omega-3 polyunsaturated fatty acid docosahexaenoic acid (DHA) abrogates these responses. Inflammasome activation, IL-1 cytokine release, and death in alveolar macrophages following cSiO2 exposure are early and critical events that likely contribute to triggering premature autoimmune pathogenesis by this particle. Here we tested the hypothesis that DHA suppresses cSiO2-induced NLRP3 inflammasome activation, IL-1 cytokine release, and cell death in the macrophage. The model used was the murine macrophage RAW 264.7 cell line stably transfected with the inflammasome adapter protein ASC (RAW-ASC). Following priming with LPS, both the canonical activator nigericin and cSiO2 elicited robust inflammasome activation in RAW-ASC cells, as reflected by IL-1β release and caspase-1 activation. These responses were greatly diminished or absent in wild-type RAW cells. In contrast to IL-1β, cSiO2 induced IL-1α release in both RAW-ASC and to a lesser extent in RAW-WT cells after LPS priming. cSiO2-driven effects in RAW-ASC cells were confirmed in bone-marrow derived macrophages. Pre-incubating RAW-ASC cells with 10 and 25 μM DHA for 24 h enriched this fatty acid in the phospholipids by 15- and 25-fold, respectively, at the expense of oleic acid. DHA pre-incubation suppressed inflammasome activation and release of IL-1β and IL-1α by nigericin, cSiO2, and two other crystals - monosodium urate and alum. DHA's suppressive effects were linked to inhibition of LPS-induced Nlrp3, Il1b, and Il1a transcription, potentially through the activation of PPARγ. Finally, nigericin-induced death was inflammasome-dependent, indicative of pyroptosis, and could be inhibited by DHA pretreatment. In contrast, cSiO2-induced death was inflammasome-independent and not inhibited by DHA. Taken together, these findings indicate that DHA suppresses cSiO2-induced inflammasome activation and IL-1 cytokine release in macrophages by acting at the level of priming, but was not protective against cSiO2-induced cell death.
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Affiliation(s)
- Kathryn A Wierenga
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, MI, United States.,Institute for Integrative Toxicology, Michigan State University, East Lansing, MI, United States
| | - Josephine Wee
- Department of Food Science and Human Nutrition, Michigan State University, East Lansing, MI, United States
| | - Kristen N Gilley
- Department of Food Science and Human Nutrition, Michigan State University, East Lansing, MI, United States
| | - Lichchavi D Rajasinghe
- Department of Food Science and Human Nutrition, Michigan State University, East Lansing, MI, United States
| | - Melissa A Bates
- Institute for Integrative Toxicology, Michigan State University, East Lansing, MI, United States.,Department of Food Science and Human Nutrition, Michigan State University, East Lansing, MI, United States
| | - Mikhail A Gavrilin
- Division of Pulmonary, Critical Care and Sleep Medicine, Ohio State University, Columbus, OH, United States
| | - Andrij Holian
- Department of Biomedical and Pharmaceutical Sciences, Center for Environmental Health Sciences, University of Montana, Missoula, MT, United States
| | - James J Pestka
- Institute for Integrative Toxicology, Michigan State University, East Lansing, MI, United States.,Department of Food Science and Human Nutrition, Michigan State University, East Lansing, MI, United States.,Department of Microbiology and Molecular Genetics, Michigan State University, East Lansing, MI, United States
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Zhang X, Xue C, Xu Q, Zhang Y, Li H, Li F, Liu Y, Guo C. Caprylic acid suppresses inflammation via TLR4/NF-κB signaling and improves atherosclerosis in ApoE-deficient mice. Nutr Metab (Lond) 2019; 16:40. [PMID: 31182969 PMCID: PMC6555760 DOI: 10.1186/s12986-019-0359-2] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2019] [Accepted: 05/01/2019] [Indexed: 12/23/2022] Open
Abstract
Background As reported previously by our group, medium-chain triglycerides can ameliorate atherosclerosis. Given that TLR4 is closely related to atherosclerosis, we hypothesized herein that caprylic acid (C8:0) would suppress inflammation via TLR4/NF-κB signaling and further promote the amelioration of atherosclerosis in apoE- deficient (apoE-/-) mice. Methods Fifty 6-week male apoE-/- mice were randomly allocated into five diet groups: a high-fat diet (HFD) without or with 2% caprylic acid (C8:0), capric acid (C10:0), stearic acid (C18:0), or linolenic acid (C18:3). RAW246.7 cells were treated with caprylic acid (C8:0), docosahexenoic acid (DHA), palmitic acid (C16:0), and lipopolysaccharide (LPS) with or without TLR4 knock-down (TLR4-KD). The serum lipid profiles, inflammatory biomolecules, and mRNA and protein expression levels were measured. Atherosclerotic lesions that occurred in the aorta and aortic sinuses were evaluated and quantified. Results Our results indicated that C8:0 reduced body fat, improved the lipid profiles, suppressed inflammatory cytokine production, downregulated aortic TLR4, MyD88, NF-κB, TNF-α, IKKα, and IKKβ mRNA expression, and alleviated atherosclerosis in the apoE-/- mice (P < 0.05). In RAW 264.7 cells, C8:0 diminished the inflammatory response and both mRNA and protein expression of TLR4, MyD88, NF-κB, and TNF-α compared to those in the LPS and C16:0 groups (P < 0.05). However, in the TLR4-KD RAW 264.7 cells, C8:0 significantly upregulated NF-κB mRNA and protein expression compared to those in the C16:0 and DHA groups. Conclusions These results suggest that C8:0 functions via TLR4/NF-κB signaling to improve the outcomes of apoE-/- mice through suppressing inflammation and ameliorating atherosclerosis. Thus, C8:0 may represent as a promising nutrient against chronic inflammatory diseases.
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Affiliation(s)
- Xinsheng Zhang
- Department of Nutrition, Tianjin Institute of Environmental & Operational Medicine, Tianjin, 300050 China.,2Department of Nutrition, Chinese PLA General Hospital, 28 Fuxing Road, Beijing, 100853 China
| | - Changyong Xue
- 2Department of Nutrition, Chinese PLA General Hospital, 28 Fuxing Road, Beijing, 100853 China
| | - Qing Xu
- 2Department of Nutrition, Chinese PLA General Hospital, 28 Fuxing Road, Beijing, 100853 China
| | - Yong Zhang
- 2Department of Nutrition, Chinese PLA General Hospital, 28 Fuxing Road, Beijing, 100853 China
| | - Huizi Li
- 3Department of Nutrition, PLA Rocket Force Characteristic Medical Center, Beijing, 100088 China
| | - Feng Li
- 4Department of Nutrition, Air Force Medical Center, PLA, Beijing, 100142 China
| | - Yinghua Liu
- 2Department of Nutrition, Chinese PLA General Hospital, 28 Fuxing Road, Beijing, 100853 China
| | - Changjiang Guo
- Department of Nutrition, Tianjin Institute of Environmental & Operational Medicine, Tianjin, 300050 China
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25
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Rovira-Llopis S, Apostolova N, Bañuls C, Muntané J, Rocha M, Victor VM. Mitochondria, the NLRP3 Inflammasome, and Sirtuins in Type 2 Diabetes: New Therapeutic Targets. Antioxid Redox Signal 2018; 29:749-791. [PMID: 29256638 DOI: 10.1089/ars.2017.7313] [Citation(s) in RCA: 69] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
SIGNIFICANCE Type 2 diabetes mellitus and hyperglycemia can lead to the development of comorbidities such as atherosclerosis and microvascular/macrovascular complications. Both type 2 diabetes and its complications are related to mitochondrial dysfunction and oxidative stress. Type 2 diabetes is also a chronic inflammatory condition that leads to inflammasome activation and the release of proinflammatory mediators, including interleukins (ILs) IL-1β and IL-18. Moreover, sirtuins are energetic sensors that respond to metabolic load, which highlights their relevance in metabolic diseases, such as type 2 diabetes. Recent Advances: Over the past decade, great progress has been made in clarifying the signaling events regulated by mitochondria, inflammasomes, and sirtuins. Nod-like receptor family pyrin domain containing 3 (NLRP3) is the best characterized inflammasome, and the generation of oxidant species seems to be critical for its activation. NLRP3 inflammasome activation and altered sirtuin levels have been observed in type 2 diabetes. Critical Issue: Despite increasing evidence of the relationship between the NLRP3 inflammasome, mitochondrial dysfunction, and oxidative stress and of their participation in type 2 diabetes physiopathology, therapeutic strategies to combat type 2 diabetes that target NLRP3 inflammasome and sirtuins are yet to be consolidated. FUTURE DIRECTIONS In this review article, we attempt to provide an overview of the existing literature concerning the crosstalk between mitochondrial impairment and the inflammasome, with particular attention to cellular and mitochondrial redox metabolism and the potential role of the NLRP3 inflammasome and sirtuins in the pathogenesis of type 2 diabetes. In addition, we discuss potential targets for therapeutic intervention based on these molecular interactions. Antioxid. Redox Signal. 29, 749-791.
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Affiliation(s)
- Susana Rovira-Llopis
- 1 Service of Endocrinology and Nutrition, University Hospital Doctor Peset , Foundation for the Promotion of Health and Biomedical Research in the Valencian Region (FISABIO), Valencia, Spain
| | - Nadezda Apostolova
- 2 Department of Pharmacology, University of Valencia , Valencia, Spain .,4 CENTRO DE INVESTIGACIÓN BIOMÉDICA EN RED de Enfermedades Hepáticas y Digestivas (CIBERehd) , Madrid, Spain
| | - Celia Bañuls
- 1 Service of Endocrinology and Nutrition, University Hospital Doctor Peset , Foundation for the Promotion of Health and Biomedical Research in the Valencian Region (FISABIO), Valencia, Spain
| | - Jordi Muntané
- 3 Department of General Surgery, Hospital University "Virgen del Rocío"/IBiS/CSIC/University of Seville , Seville, Spain .,4 CENTRO DE INVESTIGACIÓN BIOMÉDICA EN RED de Enfermedades Hepáticas y Digestivas (CIBERehd) , Madrid, Spain
| | - Milagros Rocha
- 1 Service of Endocrinology and Nutrition, University Hospital Doctor Peset , Foundation for the Promotion of Health and Biomedical Research in the Valencian Region (FISABIO), Valencia, Spain .,4 CENTRO DE INVESTIGACIÓN BIOMÉDICA EN RED de Enfermedades Hepáticas y Digestivas (CIBERehd) , Madrid, Spain
| | - Victor M Victor
- 1 Service of Endocrinology and Nutrition, University Hospital Doctor Peset , Foundation for the Promotion of Health and Biomedical Research in the Valencian Region (FISABIO), Valencia, Spain .,4 CENTRO DE INVESTIGACIÓN BIOMÉDICA EN RED de Enfermedades Hepáticas y Digestivas (CIBERehd) , Madrid, Spain .,5 Department of Physiology, University of Valencia , Valencia, Spain
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Amin J, Boche D, Rakic S. What do we know about the inflammasome in humans? Brain Pathol 2018; 27:192-204. [PMID: 27997042 DOI: 10.1111/bpa.12479] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2016] [Accepted: 12/06/2016] [Indexed: 12/17/2022] Open
Abstract
The inflammasome complex is part of the innate immune system, which serves to protect the host against harm from pathogens and damaged cells. It is a term first proposed by Tschopp's group in 2002, with numerous original research articles and reviews published on the topic since. There have been many types of inflammasome identified, but all result in the common pathway of activation of caspases and interleukin 1β along with possible cell death called pyroptosis. Despite a growing body of research investigating the structure and function of the inflammasome in animal models, there is still limited evidence identifying inflammasome components in human physiology and disease. In this review, we explore the molecular structure and mechanism of activation of the inflammasome with a particular focus on inflammasome complexes expressed in humans. Inflammasome components have been identified in several human peripheral and brain tissues using both in vivo and ex vivo work, and the inflammasome complex has been shown to be associated with several genetic and acquired inflammatory and neoplastic disorders. We discuss the strengths and weaknesses of the information available on the inflammasome with an emphasis on the importance of prioritizing work on human tissue. There is a huge demand for more effective treatments for a number of inflammatory and neurodegenerative diseases. Modulation of the inflammasome has been proposed as a novel treatment for several of these diseases and there are currently clinical trials ongoing to test this theory.
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Affiliation(s)
- Jay Amin
- Clinical Neurosciences, Clinical and Experimental Sciences Academic Unit, Faculty of Medicine, University of Southampton, Southampton, SO16 6YD, United Kingdom.,Memory Assessment and Research Centre, Moorgreen Hospital, Southern Health Foundation Trust, Southampton, SO30 3JB, United Kingdom
| | - Delphine Boche
- Clinical Neurosciences, Clinical and Experimental Sciences Academic Unit, Faculty of Medicine, University of Southampton, Southampton, SO16 6YD, United Kingdom
| | - Sonja Rakic
- Clinical Neurosciences, Clinical and Experimental Sciences Academic Unit, Faculty of Medicine, University of Southampton, Southampton, SO16 6YD, United Kingdom
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Eslamloo K, Xue X, Hall JR, Smith NC, Caballero-Solares A, Parrish CC, Taylor RG, Rise ML. Transcriptome profiling of antiviral immune and dietary fatty acid dependent responses of Atlantic salmon macrophage-like cells. BMC Genomics 2017; 18:706. [PMID: 28886690 PMCID: PMC5591513 DOI: 10.1186/s12864-017-4099-2] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2017] [Accepted: 08/30/2017] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND Due to the limited availability and high cost of fish oil in the face of increasing aquaculture production, there is a need to reduce usage of fish oil in aquafeeds without compromising farm fish health. Therefore, the present study was conducted to determine if different levels of vegetable and fish oils can alter antiviral responses of salmon macrophage-like cells (MLCs). Atlantic salmon (Salmo salar) were fed diets containing 7.4% (FO7) or 5.1% (FO5) fish oil. These diets were designed to be relatively low in EPA + DHA (i.e. FO7: 1.41% and FO5: 1%), but near the requirement level, and resulting in comparable growth. Vegetable oil (i.e. rapeseed oil) was used to balance fish oil in experimental diets. After a 16-week feeding trial, MLCs isolated from fish in these dietary groups were stimulated by a viral mimic (dsRNA: pIC) for 6 h (qPCR assay) and 24 h (microarray and qPCR assays). RESULTS The fatty acid composition of head kidney leukocytes varied between the two dietary groups (e.g. higher 20:5n-3 in the FO7 group). Following microarray assays using a 44K salmonid platform, Rank Products (RP) analysis showed 14 and 54 differentially expressed probes (DEP) (PFP < 0.05) between the two diets in control and pIC groups (FO5 vs. FO7), respectively. Nonetheless, Significance Analysis of Microarrays (SAM, FDR < 0.05) identified only one DEP between pIC groups of the two diets. Moreover, we identified a large number (i.e. 890 DEP in FO7 and 1128 DEP in FO5 overlapping between SAM and RP) of pIC-responsive transcripts, and several of them were involved in TLR-/RLR-dependent and cytokine-mediated pathways. The microarray results were validated as significantly differentially expressed by qPCR assays for 2 out of 9 diet-responsive transcripts and for all of the 35 selected pIC-responsive transcripts. CONCLUSION Fatty acid-binding protein adipocyte (fabp4) and proteasome subunit beta type-8 (psmb8) were significantly up- and down-regulated, respectively, in the MLCs of fish fed the diet with a lower level of fish oil, suggesting that they are important diet-responsive, immune-related biomarkers for future studies. Although the different levels of dietary fish and vegetable oils involved in this study affected the expression of some transcripts, the immune-related pathways and functions activated by the antiviral response of salmon MLCs in both groups were comparable overall. Moreover, the qPCR revealed transcripts responding early to pIC (e.g. lgp2, map3k8, socs1, dusp5 and cflar) and time-responsive transcripts (e.g. scarb1-a, csf1r, traf5a, cd80 and ctsf) in salmon MLCs. The present study provides a comprehensive picture of the putative molecular pathways (e.g. RLR-, TLR-, MAPK- and IFN-associated pathways) activated by the antiviral response of salmon MLCs.
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Affiliation(s)
- Khalil Eslamloo
- Department of Ocean Sciences, Memorial University of Newfoundland, 1 Marine Lab Road, St. John's, NL, A1C 5S7, Canada.
| | - Xi Xue
- Department of Ocean Sciences, Memorial University of Newfoundland, 1 Marine Lab Road, St. John's, NL, A1C 5S7, Canada
| | - Jennifer R Hall
- Aquatic Research Cluster, CREAIT Network, Memorial University of Newfoundland, 1 Marine Lab Road, St. John's, NL, A1C 5S7, Canada
| | - Nicole C Smith
- Department of Ocean Sciences, Memorial University of Newfoundland, 1 Marine Lab Road, St. John's, NL, A1C 5S7, Canada
| | - Albert Caballero-Solares
- Department of Ocean Sciences, Memorial University of Newfoundland, 1 Marine Lab Road, St. John's, NL, A1C 5S7, Canada
| | - Christopher C Parrish
- Department of Ocean Sciences, Memorial University of Newfoundland, 1 Marine Lab Road, St. John's, NL, A1C 5S7, Canada
| | | | - Matthew L Rise
- Department of Ocean Sciences, Memorial University of Newfoundland, 1 Marine Lab Road, St. John's, NL, A1C 5S7, Canada.
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Shen L, Yang Y, Ou T, Key CCC, Tong SH, Sequeira RC, Nelson JM, Nie Y, Wang Z, Boudyguina E, Shewale SV, Zhu X. Dietary PUFAs attenuate NLRP3 inflammasome activation via enhancing macrophage autophagy. J Lipid Res 2017; 58:1808-1821. [PMID: 28729463 PMCID: PMC5580895 DOI: 10.1194/jlr.m075879] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2017] [Revised: 07/18/2017] [Indexed: 12/20/2022] Open
Abstract
Dietary PUFAs reduce atherosclerosis and macrophage inflammation, but how nucleotide-binding oligomerization domain leucine-rich repeat-containing receptor protein (NLRP3) inflammasome activation and autophagy influence PUFA-mediated atheroprotection is poorly understood. We fed Ldlr-/- mice diets containing 10% (calories) palm oil (PO) and 0.2% cholesterol, supplemented with an additional 10% of calories as PO, fish oil (FO), echium oil (EO, containing 18:4 n-3), or borage oil (BO, containing 18:3 n-6). Inflammasome activation, autophagic flux, and mitochondrial function were measured in peritoneal macrophages, blood monocytes, or liver from diet-fed mice. Compared with PO, dietary PUFAs (FO, EO, or BO) markedly inhibited inflammasome activation, shown by 1) less macrophage IL-1β secretion and caspase-1 cleavage in response to NLRP3 inflammasome activators, 2) less IL-1β secretion and caspase-1 cleavage from liver or hepatocytes in response to lipopolysaccharide (LPS), and 3) attenuated caspase-1 activity in blood monocytes. Furthermore, PUFA-enriched diets increased LC3-II expression in macrophage, aorta, and liver samples and reduced numbers of dysfunctional mitochondria in macrophages in response to LPS and palmitate, suggesting enhanced autophagic activation. Dietary PUFAs did not attenuate NLRP3 inflammasome activation in atg5-deficient macrophages, indicating that autophagic activation is critical for the PUFA-mediated inflammasome inactivation. In conclusion, dietary PUFAs reduce atherosclerosis, in part, by activation of macrophage autophagy and attenuation of NLRP3 inflammasome activation.
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Affiliation(s)
- Lulu Shen
- Department of Internal Medicine, Section on Molecular Medicine, Wake Forest School of Medicine, Winston-Salem, NC
| | - Yan Yang
- Department of Internal Medicine, Section on Molecular Medicine, Wake Forest School of Medicine, Winston-Salem, NC
| | - Tiantong Ou
- Department of Internal Medicine, Section on Molecular Medicine, Wake Forest School of Medicine, Winston-Salem, NC
| | - Chia-Chi C Key
- Department of Internal Medicine, Section on Molecular Medicine, Wake Forest School of Medicine, Winston-Salem, NC
| | - Sarah H Tong
- Prestige Department of Poultry Science, North Carolina State University, Raleigh, NC
| | - Russel C Sequeira
- Department of Internal Medicine, Section on Molecular Medicine, Wake Forest School of Medicine, Winston-Salem, NC
| | - Jonathan M Nelson
- Department of Internal Medicine, Section on Molecular Medicine, Wake Forest School of Medicine, Winston-Salem, NC
| | - Yan Nie
- Department of Internal Medicine, Section on Molecular Medicine, Wake Forest School of Medicine, Winston-Salem, NC
| | - Zhan Wang
- Department of Internal Medicine, Section on Molecular Medicine, Wake Forest School of Medicine, Winston-Salem, NC
| | - Elena Boudyguina
- Department of Internal Medicine, Section on Molecular Medicine, Wake Forest School of Medicine, Winston-Salem, NC
| | - Swapnil V Shewale
- Department of Internal Medicine, Section on Molecular Medicine, Wake Forest School of Medicine, Winston-Salem, NC
| | - Xuewei Zhu
- Department of Internal Medicine, Section on Molecular Medicine, Wake Forest School of Medicine, Winston-Salem, NC
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Li G, Chen Z, Bhat OM, Zhang Q, Abais-Battad JM, Conley SM, Ritter JK, Li PL. NLRP3 inflammasome as a novel target for docosahexaenoic acid metabolites to abrogate glomerular injury. J Lipid Res 2017; 58:1080-1090. [PMID: 28404641 DOI: 10.1194/jlr.m072587] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2016] [Revised: 03/31/2017] [Indexed: 01/09/2023] Open
Abstract
The nucleotide-binding oligomerization domain-like receptor containing pyrin domain 3 (NLRP3) inflammasome has been implicated in podocyte injury and glomerular sclerosis during hyperhomocysteinemia (hHcys). However, it remains unclear whether the NLRP3 inflammasome can be a therapeutic target for treatment of hHcys-induced kidney injury. Given that DHA metabolites-resolvins have potent anti-inflammatory effects, the present study tested whether the prototype, resolvin D1 (RvD1), and 17S-hydroxy DHA (17S-HDHA), an intermediate product, abrogate hHcys-induced podocyte injury by targeting the NLRP3 inflammasome. In vitro, confocal microscopy demonstrated that 17S-HDHA (100 nM) and RvD1 (60 nM) prevented Hcys-induced formation of NLRP3 inflammasomes, as shown by reduced colocalization of NLRP3 with apoptosis-associated speck-like protein containing a caspase recruitment domain (ASC) or caspase-1. Both DHA metabolites inhibited Hcys-induced caspase-1 activation and interleukin-1β production. However, DHA had no significant effect on these Hcys-induced changes in podocytes. In vivo, DHA lipoxygenase metabolites substantially inhibited podocyte NLRP3 inflammasome formation and activation and consequent glomerular sclerosis in mice with hHcys. Mechanistically, RvD1 and 17S-HDHA were shown to suppress Hcys-induced formation of lipid raft redox signaling platforms and subsequent O2·- production in podocytes. It is concluded that inhibition of NLRP3 inflammasome activation is one of the important mechanisms mediating the beneficial action of RvD1 and 17S-HDHA on Hcys-induced podocyte injury and glomerular sclerosis.
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Affiliation(s)
- Guangbi Li
- Department of Pharmacology and Toxicology, School of Medicine, Virginia Commonwealth University, Richmond, VA
| | - Zhida Chen
- Department of Pharmacology and Toxicology, School of Medicine, Virginia Commonwealth University, Richmond, VA
| | - Owais M Bhat
- Department of Pharmacology and Toxicology, School of Medicine, Virginia Commonwealth University, Richmond, VA
| | - Qinghua Zhang
- Department of Pharmacology and Toxicology, School of Medicine, Virginia Commonwealth University, Richmond, VA
| | - Justine M Abais-Battad
- Department of Pharmacology and Toxicology, School of Medicine, Virginia Commonwealth University, Richmond, VA
| | - Sabena M Conley
- Department of Pharmacology and Toxicology, School of Medicine, Virginia Commonwealth University, Richmond, VA
| | - Joseph K Ritter
- Department of Pharmacology and Toxicology, School of Medicine, Virginia Commonwealth University, Richmond, VA
| | - Pin-Lan Li
- Department of Pharmacology and Toxicology, School of Medicine, Virginia Commonwealth University, Richmond, VA
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Abstract
Macrophages represent a key cellular component of the liver, and are essential for maintaining tissue homeostasis and ensuring rapid responses to hepatic injury. Our understanding of liver macrophages has been revolutionized by the delineation of heterogeneous subsets of these cells. Kupffer cells are a self-sustaining, liver-resident population of macrophages and can be distinguished from the monocyte-derived macrophages that rapidly accumulate in the injured liver. Specific environmental signals further determine the polarization and function of hepatic macrophages. These cells promote the restoration of tissue integrity following liver injury or infection, but they can also contribute to the progression of liver diseases, including hepatitis, fibrosis and cancer. In this Review, we highlight novel findings regarding the origin, classification and function of hepatic macrophages, and we discuss their divergent roles in the healthy and diseased liver.
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Affiliation(s)
- Oliver Krenkel
- Department of Medicine III, University Hospital Aachen, D-52074 Aachen, Germany
| | - Frank Tacke
- Department of Medicine III, University Hospital Aachen, D-52074 Aachen, Germany
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