RESUMO
OMT-28 is a metabolically robust small molecule developed to mimic the structure and function of omega-3 epoxyeicosanoids. However, it remained unknown to what extent OMT-28 also shares the cardioprotective and anti-inflammatory properties of its natural counterparts. To address this question, we analyzed the ability of OMT-28 to ameliorate hypoxia/reoxygenation (HR)-injury and lipopolysaccharide (LPS)-induced endotoxemia in cultured cardiomyocytes. Moreover, we investigated the potential of OMT-28 to limit functional damage and inflammasome activation in isolated perfused mouse hearts subjected to ischemia/reperfusion (IR) injury. In the HR model, OMT-28 (1 µM) treatment largely preserved cell viability (about 75 versus 40% with the vehicle) and mitochondrial function as indicated by the maintenance of NAD+/NADH-, ADP/ATP-, and respiratory control ratios. Moreover, OMT-28 blocked the HR-induced production of mitochondrial reactive oxygen species. Pharmacological inhibition experiments suggested that Gαi, PI3K, PPARα, and Sirt1 are essential components of the OMT-28-mediated pro-survival pathway. Counteracting inflammatory injury of cardiomyocytes, OMT-28 (1 µM) reduced LPS-induced increases in TNFα protein (by about 85% versus vehicle) and NF-κB DNA binding (by about 70% versus vehicle). In the ex vivo model, OMT-28 improved post-IR myocardial function recovery to reach about 40% of the baseline value compared to less than 20% with the vehicle. Furthermore, OMT-28 (1 µM) limited IR-induced NLRP3 inflammasome activation similarly to a direct NLRP3 inhibitor (MCC950). Overall, this study demonstrates that OMT-28 possesses potent cardio-protective and anti-inflammatory properties supporting the hypothesis that extending the bioavailability of omega-3 epoxyeicosanoids may improve their prospects as therapeutic agents.
Assuntos
Cardiotônicos , Miócitos Cardíacos , Animais , Camundongos , Miócitos Cardíacos/efeitos dos fármacos , Miócitos Cardíacos/metabolismo , Cardiotônicos/farmacologia , Cardiotônicos/química , Inflamassomos/metabolismo , Traumatismo por Reperfusão Miocárdica/metabolismo , Traumatismo por Reperfusão Miocárdica/tratamento farmacológico , Traumatismo por Reperfusão Miocárdica/patologia , Traumatismo por Reperfusão Miocárdica/prevenção & controle , Lipopolissacarídeos/farmacologia , Masculino , Proteína 3 que Contém Domínio de Pirina da Família NLR/metabolismo , Camundongos Endogâmicos C57BL , Sirtuína 1/metabolismo , Anti-Inflamatórios/farmacologia , Espécies Reativas de Oxigênio/metabolismo , Ácidos Graxos Ômega-3/farmacologia , Ácidos Graxos Ômega-3/química , Endotoxemia/tratamento farmacológico , Endotoxemia/metabolismoRESUMO
Omega-3 fatty acids are essential fatty acids that are not synthesised by the human body and have been linked with the prevention of chronic illnesses such as cardiovascular and neurodegenerative diseases. However, the current dietary habits of the majority of the population include lower omega-3 content compared to omega-6, which does not promote good health. To overcome this, pharmaceutical and nutraceutical companies aim to produce omega-3-fortified foods. For this purpose, various approaches have been employed to obtain omega-3 concentrates from sources such as fish and algal oil with higher amounts of eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA). Among these techniques, enzymatic enrichment using lipase enzymes has gained tremendous interest as it is low in capital cost and simple in operation. Microorganism-derived lipases are preferred as they are easily produced due to their higher growth rate, and they hold the ability to be manipulated using genetic modification. This review aims to highlight the recent studies that have been carried out using marine lipases for the enrichment of omega-3, to provide insight into future directions. Overall, the covalent bond-based lipase immobilization to various support materials appears most promising; however, greener and less expensive options need to be strengthened.
Assuntos
Organismos Aquáticos , Suplementos Nutricionais , Ácidos Graxos Ômega-3 , Lipase , Lipase/metabolismo , Lipase/química , Ácidos Graxos Ômega-3/química , Humanos , Animais , Óleos de Peixe/químicaRESUMO
Omega-3 polyunsaturated fatty acids (ω-3 PUFAs) offer diverse health benefits, such as supporting cardiovascular health, improving cognitive function, promoting joint and musculoskeletal health, and contributing to healthy aging. Despite their advantages, challenges like oxidation susceptibility, low bioavailability, and potential adverse effects at high doses persist. Nanoparticle encapsulation emerges as a promising avenue to address these limitations while preserving stability, enhanced bioavailability, and controlled release. This comprehensive review explores the therapeutic roles of omega-3 fatty acids, critically appraising their shortcomings and delving into modern encapsulation strategies. Furthermore, it explores the potential advantages of metal-organic framework nanoparticles (MOF NPs) compared to other commonly utilized nanoparticles in improving the therapeutic effectiveness of omega-3 fatty acids within drug delivery systems (DDSs). Additionally, it outlines future research directions to fully exploit the therapeutic benefits of these encapsulated omega-3 formulations for cardiovascular disease treatment.
Assuntos
Doenças Cardiovasculares , Ácidos Graxos Ômega-3 , Nanopartículas , Ácidos Graxos Ômega-3/química , Ácidos Graxos Ômega-3/farmacologia , Ácidos Graxos Ômega-3/administração & dosagem , Humanos , Doenças Cardiovasculares/tratamento farmacológico , Doenças Cardiovasculares/prevenção & controle , Nanopartículas/química , Animais , Disponibilidade Biológica , Sistemas de Liberação de Medicamentos , Estruturas Metalorgânicas/químicaRESUMO
Omega-3 fatty acids are in high demand due to their efficacy in treating hypertriglyceridemia and preventing cardiovascular diseases. However, the growth of the industry is hampered by low purity and insufficient productivity. This study aims to develop an efficient RP-MPLC purification method for omega-3 fatty acid ethyl esters with high purity and capacity. The results indicate that the AQ-C18 featuring polar end-capped silanol groups outperformed C18 and others in retention time and impurity separation. By injecting pure fish oil esters with a volume equivalent to a 1.25% bed volume on an AQ-C18 MPLC column using a binary isocratic methanol-water (90:10, v:v) mobile phase at 30 mL/min, optimal omega-3 fatty acid ethyl esters were obtained, with the notable purity of 90.34% and a recovery rate of 74.30%. The total content of EPA and DHA produced increased from 67.91% to 85.27%, meeting the acceptance criteria of no less than 84% set by the 2020 edition of the Pharmacopoeia of the People's Republic of China. In contrast, RP-MPLC significantly enhanced the production efficiency per unit output compared to RP-HPLC. This study demonstrates a pioneering approach to producing omega-3 fatty acid ethyl esters with high purity and of greater quantity using AQ-C18 RP-MPLC, showing this method's significant potential for use in industrial-scale manufacturing.
Assuntos
Cromatografia de Fase Reversa , Ésteres , Ácidos Graxos Ômega-3 , Óleos de Peixe , Ácidos Graxos Ômega-3/química , Ácidos Graxos Ômega-3/isolamento & purificação , Ésteres/química , Ésteres/isolamento & purificação , Óleos de Peixe/química , Cromatografia de Fase Reversa/métodos , Cromatografia Líquida de Alta Pressão/métodos , Ácidos Docosa-Hexaenoicos/química , Ácidos Docosa-Hexaenoicos/isolamento & purificação , Ácido Eicosapentaenoico/química , Ácido Eicosapentaenoico/isolamento & purificaçãoRESUMO
There has been an increase in interest in the application of ω-3 PUFAs, especially EPA and DHA, in the development of various food products owing to their myriad health benefits. However, most fish oils do not contain more than 30% combined levels of EPA and DHA. In this study, through the urea complexation procedure, the production of EPA and DHA concentrate in their free fatty acids (FFAs) form was achieved from an enzymatic oil extracted from common kilka (Clupeonella cultriventris caspia). To gain the maximum value of EPA and DHA, the response surface methodology (RSM), which is an effective tool to categorize the level of independent variables onto the responses of an experimental process, was also used. Different variables including the urea-fatty acids (FAs) ratio (in the range of 2-6, w/w), the temperature of crystallization (in the range of -24-8 °C), and the time of crystallization (in the range of 8-40 h) were investigated by response surface methodology (RSM) for maximizing the EPA and DHA contents. Following the model validation, the levels of the variables at which the maximum desirability function (0.907 score) was obtained for response variables were 5:1 (urea-FAs ratio), -9 °C (the temperature of crystallization), and 24 h (the time of crystallization). Under these optimal conditions, increases of 2.2 and 4.4 times in the EPA and DHA concentrations were observed, respectively, and an increase in the concentrations of EPA and DHA from 5.39 and 13.32% in the crude oil to 12.07 and 58.36% in the ω-3 PUFA concentrates were observed, respectively. These findings indicate that the urea complexation process is efficient at optimizated conditions.
Assuntos
Ácidos Graxos Ômega-3 , Óleos de Peixe , Ureia , Ureia/química , Ácidos Graxos Ômega-3/química , Óleos de Peixe/química , Ácidos Docosa-Hexaenoicos/química , Ácidos Docosa-Hexaenoicos/análise , Ácido Eicosapentaenoico/química , Ácido Eicosapentaenoico/análise , Animais , CristalizaçãoRESUMO
BACKGROUND: Omega-3 fatty acids are known for their various health benefits. Chia is the richest vegetable source of omega-3 fatty acids. However, its oil is highly susceptible to oxidative deterioration and should be protected for incorporation into food matrices. This work aimed to study the incorporation of different chia oil microcapsules in a powdered beverage, analyzing the effect on the physicochemical characteristics and stability during storage. RESULTS: Different types of microcapsules were obtained: monolayer microcapsules using sodium caseinate and lactose as wall material, and multilayer microcapsules produced through electrostatic deposition using lecithins, chitosan, and chia mucilage as the first, second, and third layers, respectively. The results demonstrated an efficient enrichment of smoothies, with omega-3 fatty acid values ranging from 24.09% to 42.73%, while the original food matrix powder lacked this component. These powder beverages exhibited low moisture content (≤ 2.91%) and low water activity (≤ 0.39). The aerated, packed density and compressibility assays indicated that adding microcapsules made the powders less dense and compressible. The color of the original powdered beverage was not modified. The dispersibility reflected an acceptable instantaneity, reaching the maximum obscuration after 30 s of stirring. The solubility of all the enriched products was higher than 70%, whereas the pH was ~6.8. The contact angle between the powder and liquid indicated an excellent ability to be reconstituted in water. The analysis of the glass transition temperature showed that the storage temperature (25 °C) was adequate. The peroxide value of all the products was low throughout the storage (≤ 1.63 meq peroxide kg-1 of oil at 90 days at 25 ± 2 °C), thus maintaining the quality of the microencapsulated chia oil. CONCLUSIONS: The results suggest that incorporating the monolayer and multilayer chia oil microcapsules that were studied could be a viable strategy for enriching smoothies with the omega-3 fatty acids present in chia seed oil. © 2023 Society of Chemical Industry.
Assuntos
Ácidos Graxos Ômega-3 , Extratos Vegetais , Salvia hispanica , Salvia , Salvia/química , Frutas/química , Ácidos Graxos Ômega-3/química , Cápsulas , Pós , Óleos de Plantas/química , Bebidas/análise , Água , Peróxidos , Ácidos GraxosRESUMO
Objectives: The aim of this study was to investigate whether chia (Salvia hispanica) seeds, which are rich in omega-3 fatty acids, amino acids, and vitamins with antioxidant properties, can mitigate the negative effects on male reproductive function caused by cyclophosphamide, a frequently used chemotherapeutic agent. Methods: Male wistar rats are divided into seven groups (n=6). All groups except the normal control (NC) received cyclophosphamide (30mg/kg, i.p.) for the first 5 days. The standard group received clomiphene citrate (0.25 mg/kg, p.o.). Treatment groups T1%, T5%, T10%, and ω-3 received 1%, 5%, and 10% chia seeds in the diet, and 880 mg/kg omega-3 fatty acid (p.o) respectively for 15 days. The effect on the reproductive system was evaluated by analysis of epididymal sperm characteristics, biochemical parameters, and serum testosterone level. Results: Clomiphene citrate improved oligospermia via hormone mediated effect. Chia seeds and omega-3 fatty acid treatment also showed improvement in reproductive parameters including oxidative stress and histological features of the testes. Omega-3 fatty acid treatment was more effective for the prevention of cyclophosphamide toxicity on testes as compared to chia seeds. Nasal bleeding was noted in several animals subjected to chia seed treatment. This occurrence might be attributed to chia seeds' impact on coagulation and/or platelet function, potentially heightened due to chemotherapy associated bone marrow suppression. Conclusions: In our study, chia seeds as well as omega-3 fatty acid treatment were found to be protective against cyclophosphamide-induced reproductive toxicity in rats. However, the adverse effect of hemorrhage associated with drug interaction of chia seeds with cytotoxic chemotherapeutic drugs needs careful attention and further investigation.
Assuntos
Ácidos Graxos Ômega-3 , Oligospermia , Salvia , Humanos , Masculino , Ratos , Animais , Ácidos Graxos Ômega-3/farmacologia , Ácidos Graxos Ômega-3/análise , Ácidos Graxos Ômega-3/química , Ratos Wistar , Salvia/química , Salvia/metabolismo , Sementes/química , Sementes/metabolismo , Ciclofosfamida/efeitos adversos , Interações Medicamentosas , Clomifeno/análiseRESUMO
Recently, MLCTs have attracted considerable attention as a potential alternative to traditional oils due to their suppressive effect on fat accumulation and insulin sensitivity. In this study, the microcapsules of MLCTs with superior performance were fabricated through different homogenization processes to overcome the limitations of ω-3 medium- and long- chain triacylglycerols (MLCTs), including poor stability and prone oxidation. Additionally, the impact of various homogenization techniques, namely, high-pressure, ultrasound, and cavitation jet, on the particle structure, encapsulation efficiency, and oxidation stability of microcapsules (MLCTs) was investigated. The MLCTs microcapsules fabricated through high-pressure homogenization had a smaller particle size of 295.12 nm, lower PDI of 0.24, and a higher zeta-potential absolute value of 32.65, which significantly improved their dispersion and encapsulation efficiency, reaching 94.56 % after the spray-drying process. Furthermore, the low moisture content and superior storage stability of MLCTs microcapsules have the potential to serve as carriers of liposoluble actives.
Assuntos
Ácidos Graxos Ômega-3 , Proteínas de Soja , Cápsulas/química , Ácidos Graxos Ômega-3/química , Oxirredução , TriglicerídeosRESUMO
The incorporation of a non-specific lipase and a sn-1,3 specific one in a single immobilized system can be a promising approach for the exploitation of both lipases. A one-step immobilization platform mediated by an isocyanide-based multi-component reaction was applied to create co-cross-linked enzymes (co-CLEs) of lipases from Rhizomucor miehei (sn-1,3 specific) and Candida antarctica (non-specific). Glutaraldehyde was found to be effective cross-linker by producing specific activity of 16.9 U/mg and immobilization yield of 99 %. High activity recovery of up to 404 % was obtained for immobilized derivatives. Leaking experiment showed covalent nature of the cross-linking processes. BSA had considerable effect on the immobilization process, providing 87-100 % immobilization yields and up to 10 times improvement in the specific activity of the immobilized derivatives. Scanning electron microscopy images showed flower-like and rod-like structures for the CLEs prepared by glutaraldehyde and undecanedicarboxylic acid, respectively. The prepared co-CLEs were examined in non-selective enrichment of eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) from fish oil, showing capability of releasing up to 100 % of both omega-3 fatty acids within 8 h of the reaction. The reusability of co-CLEs in five successive cycles presented retaining 63-72 % of their initial activities after the fifth reuse cycle in the hydrolysis reaction.
Assuntos
Ácidos Graxos Ômega-3 , Proteínas Fúngicas , Ácidos Graxos Ômega-3/química , Óleos de Peixe/química , Glutaral , Enzimas Imobilizadas/química , Lipase/química , RhizomucorRESUMO
A novel approach for in situ transesterification, extraction, separation, and purification of fatty acid ethyl esters (FAEE) for biodiesel and docosahexaenoic acid (DHA) from Thraustochytrid biomass has been developed. The downstream processing of Thraustochytrids oil necessitates optimization, considering the higher content of polyunsaturated fatty acids (PUFA). While two-step methods are commonly employed for extracting and transesterifying oil from oleaginous microbes, this may result in oxidation/epoxidation of omega-3 oil due to prolonged exposure to heat and oxygen. To address this issue, a rapid single-step method was devised for in situ transesterification of Thraustochytrid oil. Through further process optimization, a 50% reduction in solvent requirement was achieved without significantly impacting fatty acid recovery or composition. Scale-up studies in a 4 L reactor demonstrated complete FAEE recovery (99.98% of total oil) from biomass, concurrently enhancing DHA yield from 16% to nearly 22%. The decolorization of FAEE oil with fuller's earth effectively removed impurities such as pigments, secondary metabolites, and waxes, resulting in a clear, shiny appearance. High-performance liquid chromatography (HPLC) analysis indicated that the eluted DHA was over 94.5% pure, as corroborated by GC-FID analysis.
Assuntos
Ácidos Docosa-Hexaenoicos , Ácidos Graxos Ômega-3 , Ácidos Docosa-Hexaenoicos/química , Biocombustíveis , Biomassa , Ácidos Graxos/química , Ácidos Graxos Ômega-3/química , Ésteres/metabolismoRESUMO
The impacts of enzymatically produced acylglycerol and glycerin monostearate on the characteristics of gelatin-stabilized omega-3 emulsions and microcapsules were investigated. Tuna oil was enzymatically produced and the resulting acylglycerol was mixed with tuna oil at 12.5% (w/w) to prepare a novel oil phase. This oil phase was stabilized by gelatin to prepare oil-in-water emulsions and subsequent microcapsules via complex coacervation. The tuna oil with glycerin monostearate (GMS) at 1 and 2% (w/w) were used as controls. Results showed that both acylglycerol and GMS significantly reduced the emulsion droplet size and zeta potential, while increasing the viscoelasticity and stability. The diacylglycerol/monoacylglycerol were involved in the oil/water interfacial layer formation by lowering interfacial tension and increasing droplet surface hydrophobicity. Overall, the changed emulsion properties promoted the complex coacervation and contributed to the formation of microcapsules with improved oxidative stability. Therefore, enzymatically produced acylglycerol can develop high-quality stable omega-3 microencapsulated novel food ingredients.
Assuntos
Cápsulas , Emulsões , Ácidos Graxos Ômega-3 , Óleos de Peixe , Gelatina , Emulsões/química , Cápsulas/química , Gelatina/química , Ácidos Graxos Ômega-3/química , Óleos de Peixe/química , Animais , Tamanho da Partícula , Glicerol/química , Atum , Glicerídeos/química , Interações Hidrofóbicas e Hidrofílicas , BiocatáliseRESUMO
Omega-3 long-chain polyunsaturated fatty acids (LCPUFA) play critical roles in human development and health. Their intake is often effectively estimated solely based on seafood consumption, though the high intake of terrestrial animal-based foods with minor amounts of LCPUFA may be significant. Covalent adduct chemical ionization (CACI) tandem mass spectrometry is one approach for de novo structural and quantitative analysis of minor unsaturated fatty acids (FA), for which standards are unavailable. Here, CACI-MS and MS/MS are used to identify and quantify minor omega-3 LCPUFA of terrestrial animal foods based on the application of measured response factors (RFs) to various FA. American mean intakes of pork, beef, chicken, and eggs contribute 20, 27, 45, and 71 mg/day of docosahexaenoic acid (DHA), respectively. The estimated intake of omega-3 DHA, eicosapentaenoic acid, and docosapentaenoic acid from nonseafood sources is significant, at 164, 103, and 330 mg/day, greater than most existing estimates of omega-3 LCPUFA intake.
Assuntos
Galinhas , Ovos , Ácidos Graxos Ômega-3 , Animais , Ácidos Graxos Ômega-3/análise , Ácidos Graxos Ômega-3/química , Ovos/análise , Humanos , Estados Unidos , Bovinos , Suínos , Carne/análise , Espectrometria de Massas em Tandem/métodos , Espectrometria de Massas/métodos , Ácidos Docosa-Hexaenoicos/análise , Ácidos Docosa-Hexaenoicos/químicaRESUMO
Medium and long-chain triacylglycerol (MLCT) rich in n-3 polyunsaturated fatty acids (PUFAs) were obtained in three-hour interesterification of fish oil with medium-chain triacylglycerol (MCTs), using lipase bio-imprinted with surfactant as a catalyst. Initially, for bio-imprinted lipase preparation, the interesterification reaction conditions were optimized, resulting in a lipase with 1.47 times higher catalytic activity compared to control (non-bio-imprinted). Afterwards, the reaction conditions for MLCT synthesis were optimized, using bio-imprinted lipase as a catalyst. The reaction reached equilibrium within first three hours at 70 °C temperature, 4 wt% lipase load, and molar ratio of substrate 1:1.5. Under these conditions, final product contained 18.52% MCT, 56.65% MLCT, and 24.83% long-chain triacylglycerol (LCT). To reduce the MCT content, a solvent extraction process was performed, yielding 2.42% MCT, 56.19% MLCT, and 41.39% LCT. The obtained structured lipids (SLs), enriched in n-3 PUFAs, offer significant health benefits, enhanced bioavailability, with potential applications in functional foods and nutraceuticals.
Assuntos
Ácidos Graxos Ômega-3 , Óleos de Peixe , Lipase , Triglicerídeos , Lipase/química , Lipase/metabolismo , Triglicerídeos/química , Ácidos Graxos Ômega-3/química , Esterificação , Óleos de Peixe/química , Biocatálise , Enzimas Imobilizadas/química , Proteínas Fúngicas/químicaRESUMO
Tetraselmis chuii is a microalgae marketed as ingredient meeting the acceptance criteria for novel foods established by the European Union and can be an important source of healthy fatty acids (FA). The aim of this research was to characterize the FA profile of T. chuii fractions obtained by supercritical carbon dioxide (SCCO2) extraction operating with two sequential co-solvents and to evaluate the effect of biomass pretreatment (freeze/thaw cycles followed by ultrasounds). T. chuii biomass was confirmed to be an important source of omega-3 FA, mainly due to the abundance of α-linolenic acid, and pre-treatment significantly improved the lipid yield. Other omega-3 FA, such as 16:3, 16:4, 18:4, 18:5, 20:3 and 20:5, were also detected in different proportions. When SCCO2 extraction of pretreated and un-pretreated T. chuii was compared with conventional solvent extraction, the nutritional quality indices of the extracts were improved by the use of SCCO2.
Assuntos
Dióxido de Carbono , Cromatografia com Fluido Supercrítico , Ácidos Graxos Ômega-3 , Ácidos Graxos Ômega-3/análise , Ácidos Graxos Ômega-3/química , Ácidos Graxos Ômega-3/isolamento & purificação , Dióxido de Carbono/química , Cromatografia com Fluido Supercrítico/métodos , Clorófitas/química , Clorófitas/metabolismo , Extratos Vegetais/química , Extratos Vegetais/isolamento & purificação , Microalgas/química , Microalgas/metabolismoRESUMO
Excipient selection is crucial to address the oxidation and solubility challenges of bioactive substances, impacting their safety and efficacy. AKPL, a novel ω-3 polyunsaturated fatty acids (PUFAs) esterified phospholipid derived from Antarctic krill, demonstrates unique antioxidant capabilities and synergistic effects. It exhibits pronounced surface activity and electronegativity at physiological pH, as evidenced by a critical micelle concentration (CMC) of 0.15 g/L and ζ-potential of -49.9 mV. In aqueous environments, AKPL self-assembles into liposomal structures, offering high biocompatibility and promoting cell proliferation. Its polyunsaturated bond-rich structure provides additional oxidation sites, imparting antioxidant properties superior to other phospholipids like DSPC and DOPC. Additionally, AKPL augments the efficacy of lipophilic antioxidants, such as alpha-tocopherol and curcumin, in aqueous media through both intermolecular and intramolecular interactions. In sum, AKPL emerges as an innovative unsaturated phospholipid, offering new strategies for encapsulating and delivering oxygen-sensitive agents.
Assuntos
Antioxidantes , Euphausiacea , Fosfolipídeos , Euphausiacea/química , Animais , Fosfolipídeos/química , Antioxidantes/química , Antioxidantes/farmacologia , Coloides/química , Humanos , Materiais Biocompatíveis/química , Materiais Biocompatíveis/farmacologia , Regiões Antárticas , Ácidos Graxos Ômega-3/química , Ácidos Graxos Ômega-3/farmacologiaRESUMO
The major lipids and antioxidant activities of Asterias rolleston gonad lipids were evaluated systematically. Major lipids of A. Rolleston gonad lipids were triacylglycerols (TAGs) and phospholipids (PLs). Total lipids were composed of 15.62% of polyunsaturated fatty acids (PUFAs), and 40.81% of monounsaturated fatty acids (MUFAs). The most abundant PUFA were C20:5n-3 (EPA) (6.28%) and C22:6n-3 (DHA) (5.80%). Predominantly composed of phosphatidylcholine (PC) and phosphatidylethanolamine (PE), polar lipids were rich in PUFAs and could contain up to 34.59% EPA and DHA, and PE and PI (phosphatidylinositol) were also found to be the main carriers of EPA and ARA (arachidonic acid) in polar lipids. The MUFA and PUFA of Sn-2 in TAG are 39.72% and 30.37%, respectively. A total of 64 TAG species were identified, with Eo-P-M, Eo-Eo-M, and M-M-Eo being the main TAGs components. Moreover, A. rollestoni gonad lipids exhibited potent radical scavenging activities and reducing power in a dose-dependent manner.
Assuntos
Antioxidantes , Ácidos Graxos Ômega-3 , Gônadas , Estrelas-do-Mar , Antioxidantes/química , Antioxidantes/análise , Animais , Ácidos Graxos Ômega-3/análise , Ácidos Graxos Ômega-3/química , Estrelas-do-Mar/química , Gônadas/química , Gônadas/metabolismo , Lipídeos/química , Fosfolipídeos/química , Fosfolipídeos/análiseRESUMO
Microalgae are promising sources of essential lipids, including omega-3 and omega-6 polyunsaturated fatty acids (n-3 and n-6 PUFA) and novel lipid metabolites like oxylipins. However, limited data exist on the oxylipin profile, its characterization, and the potential impact of the extraction process on these metabolites in microalgae. Thus, our study aimed to investigate the fatty acid and oxylipin profile of four microalgal species of interest (Microchloropsis gaditana, Tisochrysis lutea, Phaeodactylum tricornutum, and Porphyridium cruentum) while also examining the impact of the extraction method, with a focus on developing a greener process using ultrasound-assisted extraction (UAE) and ethanol. The UAE method showed similar oxylipin profiles, generally yielding concentrations comparable to those of the conventional Folch method. In total, 68 oxylipins derived from n-3 and n-6 PUFA were detected, with the highest concentrations of n-3 oxylipins found in P. tricornutum and T. lutea and of n-6 oxylipins in P. cruentum. This study provides the most extensive oxylipin characterization of these microalgae species to date, offering insights into alternative extraction methods and opening new avenues for further investigation of the significance of oxylipins in microalgae.
Assuntos
Microalgas , Oxilipinas , Oxilipinas/isolamento & purificação , Oxilipinas/análise , Microalgas/química , Microalgas/metabolismo , Cromatografia Líquida de Alta Pressão , Química Verde , Espectrometria de Massas , Ácidos Graxos Ômega-3/análise , Ácidos Graxos Ômega-3/metabolismo , Ácidos Graxos Ômega-3/isolamento & purificação , Ácidos Graxos Ômega-3/química , Espectrometria de Massas em Tandem , Fracionamento Químico/métodos , Espectrometria de Massa com Cromatografia LíquidaRESUMO
Krill oil is extracted from krill, a small crustacean in the Antarctic Ocean. It has received growing attention because of krill oil's unique properties and diverse health benefits. Recent experimental and clinical studies suggest that it has potential therapeutic benefits in preventing the development of a range of chronic conditions, including inflammatory bowel disease (IBD). Krill oil is enriched with long-chain n-3 polyunsaturated fatty acids, especially eicosapentaenoic and docosahexaenoic acids, and the potent antioxidant astaxanthin, contributing to its therapeutic properties. The possible underlying mechanisms of krill oil's health benefits include anti-inflammatory and antioxidant actions, maintaining intestinal barrier functions, and modulating gut microbiota. This review aims to provide an overview of the beneficial effects of krill oil and its bioactive components on intestinal inflammation and to discuss the findings on the molecular mechanisms associated with the role of krill oil in IBD prevention and treatment.
Assuntos
Euphausiacea , Doenças Inflamatórias Intestinais , Euphausiacea/química , Animais , Doenças Inflamatórias Intestinais/tratamento farmacológico , Doenças Inflamatórias Intestinais/metabolismo , Humanos , Microbioma Gastrointestinal/efeitos dos fármacos , Óleos/química , Óleos/farmacologia , Anti-Inflamatórios/farmacologia , Anti-Inflamatórios/química , Anti-Inflamatórios/uso terapêutico , Antioxidantes/farmacologia , Antioxidantes/química , Antioxidantes/uso terapêutico , Ácidos Graxos Ômega-3/farmacologia , Ácidos Graxos Ômega-3/uso terapêutico , Ácidos Graxos Ômega-3/químicaRESUMO
Essential polyunsaturated fatty acids (PUFAs) of the n-3 and n-6 classes are crucial for maintaining many physiological functions of the human body. It has previously been suggested that the beneficial effects of n-3 PUFAs are mediated by the action of bioactive lipid components, although it remains unclear which specific lipids are metabolically active. The aim of this study was to assess the impact of various liposomal diets on the content and ratio of liver phospholipids, containing n-3 and n-6 PUFAs, in F1 (C57blxDBA2\6) mice. Lipidomic analysis using chromatography-mass spectrometry was employed to investigate changes in the fatty acid profile of liver phospholipids in six groups of mice. These mice were fed liposomal complexes of different compositions in drinks replacing water for a long-term diet (3 months). Two additional groups of mice, aged 2 and 5 months, were used as control groups. The six liposomal complexes included different combinations of phosphatidylcholine (PC), a natural antioxidant (clove bud essential oil (CEO)), fish oil (FO), and sodium caseinate (SC). The consumption of the PC-CEO-FO-SC liposomal complex significantly increased the amount of liver phospholipids containing n-3 docosahexaenoic acid, including phosphatidylcholines, phosphatidylethanolamines (PE), phosphatidylserines (PS), and lysophosphatidylcholine (LPC). This increase was accompanied by a marked decrease in the amount of phospholipids containing n-6 arachidonic acid. As a result, the weight ratio of phospholipids containing n-6 PUFAs to those containing n-3 PUFAs decreased significantly, especially for PC and PE subclasses. Therefore, the PC-CEO-FO-SC liposomal complex has the potential to enhance resistance to inflammation and reduce the risk of non-communicable diseases.