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Gonçalves-de-Albuquerque CF, Medeiros-de-Moraes IM, Oliveira FMDJ, Burth P, Bozza PT, Castro Faria MV, Silva AR, de Castro-Faria-Neto HC. Omega-9 Oleic Acid Induces Fatty Acid Oxidation and Decreases Organ Dysfunction and Mortality in Experimental Sepsis. PLoS One 2016; 11:e0153607. [PMID: 27078880 PMCID: PMC4831806 DOI: 10.1371/journal.pone.0153607] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2015] [Accepted: 03/31/2016] [Indexed: 01/18/2023] Open
Abstract
Sepsis is characterized by inflammatory and metabolic alterations, which lead to massive cytokine production, oxidative stress and organ dysfunction. In severe systemic inflammatory response syndrome, plasma non-esterified fatty acids (NEFA) are increased. Several NEFA are deleterious to cells, activate Toll-like receptors and inhibit Na+/K+-ATPase, causing lung injury. A Mediterranean diet rich in olive oil is beneficial. The main component of olive oil is omega-9 oleic acid (OA), a monounsaturated fatty acid (MUFA). We analyzed the effect of OA supplementation on sepsis. OA ameliorated clinical symptoms, increased the survival rate, prevented liver and kidney injury and decreased NEFA plasma levels in mice subjected to cecal ligation and puncture (CLP). OA did not alter food intake and weight gain but diminished reactive oxygen species (ROS) production and NEFA plasma levels. Carnitine palmitoyltransferase IA (CPT1A) mRNA levels were increased, while uncoupling protein 2 (UCP2) liver expression was enhanced in mice treated with OA. OA also inhibited the decrease in 5' AMP-activated protein kinase (AMPK) expression and increased the enzyme expression in the liver of OA-treated mice compared to septic animals. We showed that OA pretreatment decreased NEFA concentration and increased CPT1A and UCP2 and AMPK levels, decreasing ROS production. We suggest that OA has a beneficial role in sepsis by decreasing metabolic dysfunction, supporting the benefits of diets high in monounsaturated fatty acids (MUFA).
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Affiliation(s)
| | | | | | - Patrícia Burth
- Departamento de Biologia Celular e Molecular, Instituto de Biologia, Universidade Federal Fluminense, 24020–15 Niterói, RJ, Brazil
| | - Patrícia Torres Bozza
- Laboratório de Imunofarmacologia, Instituto Oswaldo Cruz, FIOCRUZ, 21040–900 Rio de Janeiro, RJ, Brazil
| | - Mauro Velho Castro Faria
- Departamento de Medicina Interna, Faculdade de Ciências Médicas, Universidade do Estado do Rio de Janeiro, 20550–900 Rio de Janeiro, RJ, Brazil
| | - Adriana Ribeiro Silva
- Laboratório de Imunofarmacologia, Instituto Oswaldo Cruz, FIOCRUZ, 21040–900 Rio de Janeiro, RJ, Brazil
- * E-mail: (ARS); (HCCFN)
| | - Hugo Caire de Castro-Faria-Neto
- Laboratório de Imunofarmacologia, Instituto Oswaldo Cruz, FIOCRUZ, 21040–900 Rio de Janeiro, RJ, Brazil
- Universidade Estácio de Sá, Programa de Produtividade Científica, Rio de Janeiro, RJ, Brazil
- * E-mail: (ARS); (HCCFN)
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Gonçalves-de-Albuquerque CF, Burth P, Silva AR, de Moraes IMM, Oliveira FMDJ, Santelli RE, Freire AS, de Lima GS, da Silva ED, da Silva CI, Morandi V, Bozza PT, Younes-Ibrahim M, de Castro Faria Neto HC, de Castro Faria MV. Murine lung injury caused by Leptospira interrogans glycolipoprotein, a specific Na/K-ATPase inhibitor. Respir Res 2014; 15:93. [PMID: 25265888 PMCID: PMC4151191 DOI: 10.1186/s12931-014-0093-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2014] [Accepted: 07/31/2014] [Indexed: 12/15/2022] Open
Abstract
Background Leptospiral glycolipoprotein (GLP) is a potent and specific Na/K-ATPase inhibitor. Severe pulmonary form of leptospirosis is characterized by edema, inflammation and intra-alveolar hemorrhage having a dismal prognosis. Resolution of edema and inflammation determines the outcome of lung injury. Na/K-ATPase activity is responsible for edema clearance. This enzyme works as a cell receptor that triggers activation of mitogen-activated protein kinase (MAPK) intracellular signaling pathway. Therefore, injection of GLP into lungs induces injury by triggering inflammation. Methods We injected GLP and ouabain, into mice lungs and compared their effects. Bronchoalveolar lavage fluid (BALF) was collected for cell and lipid body counting and measurement of protein and lipid mediators (PGE2 and LTB4). The levels of the IL-6, TNFα, IL-1B and MIP-1α were also quantified. Lung images illustrate the injury and whole-body plethysmography was performed to assay lung function. We used Toll-like receptor 4 (TLR4) knockout mice to evaluate leptospiral GLP-induced lung injury. Na/K-ATPase activity was determined in lung cells by nonradioactive rubidium incorporation. We analyzed MAPK p38 activation in lung and in epithelial and endothelial cells. Results Leptospiral GLP and ouabain induced lung edema, cell migration and activation, production of lipid mediators and cytokines and hemorrhage. They induced lung function alterations and inhibited rubidium incorporation. Using TLR4 knockout mice, we showed that the GLP action was not dependent on TLR4 activation. GLP activated of p38 and enhanced cytokine production in cell cultures which was reversed by a selective p38 inhibitor. Conclusions GLP and ouabain induced lung injury, as evidenced by increased lung inflammation and hemorrhage. To our knowledge, this is the first report showing GLP induces lung injury. GLP and ouabain are Na/K-ATPase targets, triggering intracellular signaling pathways. We showed p38 activation by GLP-induced lung injury, which was may be linked to Na/K-ATPase inhibition. Lung inflammation induced by GLP was not dependent on TLR4 activation.
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Gonçalves-de-Albuquerque CF, Burth P, Silva AR, de Moraes IMM, de Jesus Oliveira FM, Santelli RE, Freire AS, Bozza PT, Younes-Ibrahim M, de Castro-Faria-Neto HC, de Castro-Faria MV. Oleic acid inhibits lung Na/K-ATPase in mice and induces injury with lipid body formation in leukocytes and eicosanoid production. J Inflamm (Lond) 2013; 10:34. [PMID: 24175969 PMCID: PMC4177532 DOI: 10.1186/1476-9255-10-34] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2012] [Accepted: 10/28/2013] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND Acute respiratory distress syndrome (ARDS) can emerge from certain pathologies, such as sepsis, fat embolism and leptospirosis, in which the levels of unesterified fatty acids are increased in the patient's plasma. ARDS is characterized by edema formation, and edema resolution occurs mainly due to the pneumocyte Na/K-ATPase activity. As previously described, increased oleic acid (OA) plasma concentrations induce lung injury by interfering with sodium transport. The first aim of this study was to develop a radioactivity-free assay to detect Na,K-ATPase activity ex vivo using a model of OA-induced lung injury in mice. We also investigated the relationship between Na/K-ATPase inhibition and OA-induced lung injury using ouabain-induced lung injury as a comparison, because of the well-described effect of ouabain as a Na/K-ATPase inhibitor. METHODS We developed a Na/K-ATPase assay based on the capture of non-radioactive Rb+ ions by mice lung tissue in the absence or presence of ouabain, a specific Na/K-ATPase inhibitor. Rb+ incorporation into the lung was measured by inductively coupled plasma-optical emission spectrometry (ICP-OES) after lung tissue mineralization. Na/K-ATPase activity was considered as the difference between Rb+ incorporation in the absence and in the presence of ouabain. Bronchoalveolar lavage fluid was collected for lung injury assessment. For this assessment, cell counting, lipid body enumeration and lipid mediator concentrations were measured. Histological analyses were used to determinate lung pathology. Whole body plethysmographic analysis was performed to assay lung function. RESULTS The lung Na/K-ATPase activity of mice was completely inhibited by an OA dose of 10 μmol, an effect also obtained with 10-3 μmol of ouabain, as demonstrated by the decreased Rb+ incorporation in the lungs. The same OA dose induced lung edema and inflammation with cell influx, lipid body formation, and leukotriene B4 (LTB4) and prostaglandin E2 (PGE2) production. Ouabain also induced lung inflammation, as detected by histological examinations. As far as we know, this is the first time that ouabain-induced lung injury was shown. Both OA and ouabain induced functional lung pathology in mice simultaneously with inhibition of the lung Na/K-ATPase activity. CONCLUSIONS We developed a new non-radioactive assay to quantified Na/K-ATPase in vivo. OA and ouabain inhibited in vivo Na/K-ATPase activity in the lungs and induced lung injury. Our data reinforce the idea that Na/K-ATPase inhibitors may worsen lung injury in specific pathological conditions.
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Affiliation(s)
| | - Patrícia Burth
- Departamento de Biologia Celular e Molecular, Instituto de Biologia, Universidade Federal Fluminense, Niterói, RJ, Brazil
| | - Adriana Ribeiro Silva
- Instituto Oswaldo Cruz, Laboratório de Imunofarmacologia, Fiocruz, Rio de Janeiro, RJ, Brazil
| | | | | | - Ricardo Erthal Santelli
- Departamento de Química Analítica, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Aline Soares Freire
- Departamento de Química Analítica, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Patrícia Torres Bozza
- Instituto Oswaldo Cruz, Laboratório de Imunofarmacologia, Fiocruz, Rio de Janeiro, RJ, Brazil
| | - Mauricio Younes-Ibrahim
- Departamento de Medicina Interna, Faculdade de Ciências Médicas, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | | | - Mauro Velho de Castro-Faria
- Departamento de Medicina Interna, Faculdade de Ciências Médicas, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
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Gonçalves-de-Albuquerque CF, Silva AR, Burth P, de Moraes IMM, Oliveira FMDJ, Younes-Ibrahim M, dos Santos MDCB, D'Ávila H, Bozza PT, Faria Neto HCDC, Faria MVDC. Oleic acid induces lung injury in mice through activation of the ERK pathway. Mediators Inflamm 2012; 2012:956509. [PMID: 23209347 PMCID: PMC3504460 DOI: 10.1155/2012/956509] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2012] [Accepted: 10/18/2012] [Indexed: 01/06/2023] Open
Abstract
Oleic acid (OA) can induce acute lung injury in experimental models. In the present work, we used intratracheal OA injection to show augmented oedema formation, cell migration and activation, lipid mediator, and cytokine productions in the bronchoalveolar fluids of Swiss Webster mice. We also demonstrated that OA-induced pulmonary injury is dependent on ERK1/2 activation, since U0126, an inhibitor of ERK1/2 phosphorylation, blocked neutrophil migration, oedema, and lipid body formation as well as IL-6, but not IL-1β production. Using a mice strain carrying a null mutation for the TLR4 receptor, we proved that increased inflammatory parameters after OA challenges were not due to the activation of the TLR4 receptor. With OA being a Na/K-ATPase inhibitor, we suggest the possible involvement of this enzyme as an OA target triggering lung inflammation.
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