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Costa VV, Resende F, Melo EM, Teixeira MM. Resolution pharmacology and the treatment of infectious diseases. Br J Pharmacol 2024; 181:917-937. [PMID: 38355144 DOI: 10.1111/bph.16323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Revised: 12/06/2023] [Accepted: 12/28/2023] [Indexed: 02/16/2024] Open
Abstract
Inflammation is elicited by the host in response to microbes, and is believed to be essential for protection against infection. However, we have previously hypothesized that excessive or misplaced inflammation may be a major contributor to tissue dysfunction and death associated with viral and bacterial infections. The resolutive phase of inflammation is a necessary condition to achieve homeostasis after acute inflammation. It is possible that targeting inflammation resolution may be beneficial for the host during infection. In this review, we summarize the evidence demonstrating the expression, roles and effects of the best described pro-resolving molecules in the context of bacterial and viral infections. Pro-resolving molecules play a pivotal role in modulating a spectrum of pathways associated with tissue inflammation and damage during both viral and bacterial infections. These molecules offer a blend of anti-inflammatory, pro-resolving and sometimes anti-infective benefits, all the while circumventing the undesired and immune-suppressive unwanted effects associated with glucocorticoids. Whether these beneficial effects will translate into benefits to patients clearly deserve further investigation.
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Affiliation(s)
- Vivian Vasconcelos Costa
- Centro de Pesquisa e Desenvolvimento de Fármacos, Department of Morphology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Filipe Resende
- Centro de Pesquisa e Desenvolvimento de Fármacos, Department of Morphology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Eliza Mathias Melo
- Centro de Pesquisa e Desenvolvimento de Fármacos, Department of Biochemistry and Immunology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Mauro Martins Teixeira
- Centro de Pesquisa e Desenvolvimento de Fármacos, Department of Biochemistry and Immunology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
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Tie H, Kuang G, Gong X, Zhang L, Zhao Z, Wu S, Huang W, Chen X, Yuan Y, Li Z, Li H, Zhang L, Wan J, Wang B. LXA4 protected mice from renal ischemia/reperfusion injury by promoting IRG1/Nrf2 and IRAK-M-TRAF6 signal pathways. Clin Immunol 2024; 261:110167. [PMID: 38453127 DOI: 10.1016/j.clim.2024.110167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2023] [Revised: 01/26/2024] [Accepted: 03/03/2024] [Indexed: 03/09/2024]
Abstract
Excessive inflammatory response and increased oxidative stress play an essential role in the pathophysiology of ischemia/reperfusion (I/R)-induced acute kidney injury (IRI-AKI). Emerging evidence suggests that lipoxin A4 (LXA4), as an endogenous negative regulator in inflammation, can ameliorate several I/R injuries. However, the mechanisms and effects of LXA4 on IRI-AKI remain unknown. In this study, A bilateral renal I/R mouse model was used to evaluate the role of LXA4 in wild-type, IRG1 knockout, and IRAK-M knockout mice. Our results showed that LXA4, as well as 5-LOX and ALXR, were quickly induced, and subsequently decreased by renal I/R. LXA4 pretreatment improved renal I/R-induced renal function impairment and renal damage and inhibited inflammatory responses and oxidative stresses in mice kidneys. Notably, LXA4 inhibited I/R-induced the activation of TLR4 signal pathway including decreased phosphorylation of TAK1, p36, and p65, but did not affect TLR4 and p-IRAK-1. The analysis of transcriptomic sequencing data and immunoblotting suggested that innate immune signal molecules interleukin-1 receptor-associated kinase-M (IRAK-M) and immunoresponsive gene 1 (IRG1) might be the key targets of LXA4. Further, the knockout of IRG1 or IRAK-M abolished the beneficial effects of LXA4 on IRI-AKI. In addition, IRG1 deficiency reversed the up-regulation of IRAK-M by LXA4, while IRAK-M knockout had no impact on the IRG1 expression, indicating that IRAK-M is a downstream molecule of IRG1. Mechanistically, we found that LXA4-promoted IRG1-itaconate not only enhanced Nrf2 activation and increased HO-1 and NQO1, but also upregulated IRAK-M, which interacted with TRAF6 by competing with IRAK-1, resulting in deactivation of TLR4 downstream signal in IRI-AKI. These data suggested that LXA4 protected against IRI-AKI via promoting IRG1/Itaconate-Nrf2 and IRAK-M-TRAF6 signaling pathways, providing the rationale for a novel strategy for preventing and treating IRI-AKI.
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Affiliation(s)
- Hongtao Tie
- Department of Cardiothoracic Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China; Chongqing Key Laboratory of Biochemistry and Molecular Pharmacology, Chongqing Medical University, Chongqing, China
| | - Ge Kuang
- Chongqing Key Laboratory of Biochemistry and Molecular Pharmacology, Chongqing Medical University, Chongqing, China
| | - Xia Gong
- Department of Anatomy, Chongqing Medical University, Chongqing, China
| | - Lidan Zhang
- Department of Anesthesiology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Zizuo Zhao
- Department of Anesthesiology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Shengwang Wu
- Department of Hematology, Xinqiao Hospital, Army Medical University, Chongqing, China
| | - Wenya Huang
- Yiling Women and Children's Hospital of Yichang City, Hubei, China
| | - Xiahong Chen
- Chongqing Key Laboratory of Biochemistry and Molecular Pharmacology, Chongqing Medical University, Chongqing, China
| | - Yinglin Yuan
- Clinical Immunology Translational Medicine Key Laboratory of Sichuan Province, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, China
| | - Zhenhan Li
- Department of Endocrinology, Chongqing Traditional Chinese Medicine Hospital, Chongqing, China
| | - Hongzhong Li
- Chongqing Key Laboratory of Molecular Oncology and Epigenetics, The First Affiliated Hospital of Chongqing Medical University; Chongqing, China
| | - Li Zhang
- Department of Pathophysiology, Chongqing Medical University, Chongqing, China
| | - Jingyuan Wan
- Chongqing Key Laboratory of Biochemistry and Molecular Pharmacology, Chongqing Medical University, Chongqing, China; Department of Pharmacology, School of Pharmacy, Chongqing Medical University, Chongqing, China..
| | - Bin Wang
- Chongqing Key Laboratory of Biochemistry and Molecular Pharmacology, Chongqing Medical University, Chongqing, China; Department of Anesthesiology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China.
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3
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Jiao Y, Zhang T, Liu M, Zhou L, Qi M, Xie X, Shi X, Gu X, Ma Z. Exosomal PGE2 from M2 macrophages inhibits neutrophil recruitment and NET formation through lipid mediator class switching in sepsis. J Biomed Sci 2023; 30:62. [PMID: 37533081 PMCID: PMC10394797 DOI: 10.1186/s12929-023-00957-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Accepted: 07/24/2023] [Indexed: 08/04/2023] Open
Abstract
BACKGROUND Excess polymorphonuclear neutrophil (PMN) recruitment or excessive neutrophil extracellular trap (NET) formation can lead to the development of multiple organ dysfunction during sepsis. M2 macrophage-derived exosomes (M2-Exos) have exhibited anti-inflammatory activities in some inflammatory diseases to mediate organ functional protection, but their role in treating sepsis-related acute lung injury (ALI) remains unclear. In this study, we sought to investigate whether M2-Exos could prevent potentially deleterious inflammatory effects during sepsis-related ALI by modulating abnormal PMN behaviours. METHODS C57BL/6 wild-type mice were subjected to a caecal ligation and puncture (CLP) mouse model to mimic sepsis in vivo, and M2-Exos were administered intraperitoneally 1 h after CLP. H&E staining, immunofluorescence and immunohistochemistry were conducted to investigate lung tissue injury, PMN infiltration and NET formation in the lung. We further demonstrated the role of M2-Exos on PMN function and explored the potential mechanisms through an in vitro coculture experiment using PMNs isolated from both healthy volunteers and septic patients. RESULTS Here, we report that M2-Exos inhibited PMN migration and NET formation, alleviated lung injury and reduced mortality in a sepsis mouse model. In vitro, M2-Exos significantly decreased PMN migration and NET formation capacity, leading to lipid mediator class switching from proinflammatory leukotriene B4 (LTB4) to anti-inflammatory lipoxin A4 (LXA4) by upregulating 15-lipoxygenase (15-LO) expression in PMNs. Treatment with LXA4 receptor antagonist attenuated the effect of M2-Exos on PMNs and lung injury. Mechanistically, prostaglandin E2 (PGE2) enriched in M2-Exos was necessary to increase 15-LO expression in PMNs by functioning on the EP4 receptor, upregulate LXA4 production to downregulate chemokine (C-X-C motif) receptor 2 (CXCR2) and reactive oxygen species (ROS) expressions, and finally inhibit PMN function. CONCLUSIONS Our findings reveal a previously unknown role of M2-Exos in regulating PMN migration and NET formation through lipid mediator class switching, thus highlighting the potential application of M2-Exos in controlling PMN-mediated tissue injury in patients with sepsis.
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Affiliation(s)
- Yang Jiao
- Department of Anesthesiology, Nanjing Drum Tower Hospital, The Affliated Hospital of Nanjing University Medical School, 321 Zhongshan Road, Nanjing, 210008, China
| | - Ti Zhang
- National Clinical Research Center of Kidney Diseases, Jinling Hospital, Nanjing University School of Medicine, Nanjing, China
| | - Mei Liu
- Department of Anesthesiology, Nanjing Drum Tower Hospital, The Affliated Hospital of Nanjing University Medical School, 321 Zhongshan Road, Nanjing, 210008, China
| | - Luyang Zhou
- Department of Anesthesiology, Nanjing Drum Tower Hospital, The Affliated Hospital of Nanjing University Medical School, 321 Zhongshan Road, Nanjing, 210008, China
| | - Mengzhi Qi
- Department of Intensive Care Unit, Nanjing Drum Tower Hospital, The Affliated Hospital of Nanjing University Medical School, Nanjing, China
| | - Xin Xie
- Department of Anesthesiology, Nanjing Drum Tower Hospital, The Affliated Hospital of Nanjing University Medical School, 321 Zhongshan Road, Nanjing, 210008, China
| | - Xueyin Shi
- Department of Anesthesiology and Intensive Care Unit, Xinhua Hospital, School of Medicine, Shanghai Jiaotong University, 1665 Kongjiang Road, Shanghai, 200092, China.
| | - Xiaoping Gu
- Department of Anesthesiology, Nanjing Drum Tower Hospital, The Affliated Hospital of Nanjing University Medical School, 321 Zhongshan Road, Nanjing, 210008, China.
| | - Zhengliang Ma
- Department of Anesthesiology, Nanjing Drum Tower Hospital, The Affliated Hospital of Nanjing University Medical School, 321 Zhongshan Road, Nanjing, 210008, China.
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Rasquel-Oliveira FS, Silva MDVD, Martelossi-Cebinelli G, Fattori V, Casagrande R, Verri WA. Specialized Pro-Resolving Lipid Mediators: Endogenous Roles and Pharmacological Activities in Infections. Molecules 2023; 28:5032. [PMID: 37446699 DOI: 10.3390/molecules28135032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 06/07/2023] [Accepted: 06/19/2023] [Indexed: 07/15/2023] Open
Abstract
During an infection, inflammation mobilizes immune cells to eliminate the pathogen and protect the host. However, inflammation can be detrimental when exacerbated and/or chronic. The resolution phase of the inflammatory process is actively orchestrated by the specialized pro-resolving lipid mediators (SPMs), generated from omega-3 and -6 polyunsaturated fatty acids (PUFAs) that bind to different G-protein coupled receptors to exert their activity. As immunoresolvents, SPMs regulate the influx of leukocytes to the inflammatory site, reduce cytokine and chemokine levels, promote bacterial clearance, inhibit the export of viral transcripts, enhance efferocytosis, stimulate tissue healing, and lower antibiotic requirements. Metabolomic studies have evaluated SPM levels in patients and animals during infection, and temporal regulation of SPMs seems to be essential to properly coordinate a response against the microorganism. In this review, we summarize the current knowledge on SPM biosynthesis and classifications, endogenous production profiles and their effects in animal models of bacterial, viral and parasitic infections.
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Affiliation(s)
- Fernanda S Rasquel-Oliveira
- Laboratory of Pain, Inflammation, Neuropathy, and Cancer, Department of Pathology, Center of Biological Sciences, Londrina State University, Londrina 86057-970, Paraná, Brazil
| | - Matheus Deroco Veloso da Silva
- Laboratory of Pain, Inflammation, Neuropathy, and Cancer, Department of Pathology, Center of Biological Sciences, Londrina State University, Londrina 86057-970, Paraná, Brazil
| | - Geovana Martelossi-Cebinelli
- Laboratory of Pain, Inflammation, Neuropathy, and Cancer, Department of Pathology, Center of Biological Sciences, Londrina State University, Londrina 86057-970, Paraná, Brazil
| | - Victor Fattori
- Vascular Biology Program, Boston Children's Hospital, Department of Surgery, Harvard Medical School, Boston, MA 02115, USA
| | - Rubia Casagrande
- Department of Pharmaceutical Sciences, Center of Health Science, Londrina State University, Londrina 86038-440, Paraná, Brazil
| | - Waldiceu A Verri
- Laboratory of Pain, Inflammation, Neuropathy, and Cancer, Department of Pathology, Center of Biological Sciences, Londrina State University, Londrina 86057-970, Paraná, Brazil
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Sundarasivarao PYK, Walker JM, Rodriguez A, Spur BW, Yin K. Resolvin D2 induces anti-microbial mechanisms in a model of infectious peritonitis and secondary lung infection. Front Immunol 2022; 13:1011944. [PMID: 36532055 PMCID: PMC9754689 DOI: 10.3389/fimmu.2022.1011944] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Accepted: 11/11/2022] [Indexed: 12/03/2022] Open
Abstract
In severe bacterial infections, there is a pro-inflammatory response to promote bacterial clearance but this response can cause tissue injury. Later, the immune system becomes dysregulated and the host is unable to clear a secondary or a pre-existing infection. Specialized Pro-resolving Mediators (SPMs) such as resolvin D2 (RvD2) have been shown to be beneficial for inflammation/infection resolution in animal models of sepsis but in vivo mechanisms by which RvD2 may promote bacterial clearance and/or attenuate deleterious effects of a secondary infection have not been fully established. In this study, we used the 2-hit model of cecal ligation and puncture (CLP) induced infectious peritonitis and secondary lung infection with Pseudomonas aeruginosa to find possible antimicrobial and immunomodulatory mechanisms of RvD2. We show that RvD2 given as late as 48h after CLP surgery reduced blood bacterial load without altering plasma cytokines compared to mice given saline vehicle. RvD2 increased splenic neutrophil accumulation as well as average reactive oxygen species (ROS) production. There was also an increase in an immature leukocyte population the myeloid derived suppressor cells (MDSCs) in the spleen of RvD2 treated mice. RvD2 reduced lung lavage bacterial load 24h after P. aeruginosa administration and significantly decreased lung lavage levels of IL-23, a cytokine essential in the Th-17 inflammatory response. In addition, we show that RvD2 increased the number of non-inflammatory alveolar macrophages after P. aeruginosa administration compared to saline treated mice. The study uncovered an antimicrobial mechanism of RvD2 where RvD2 increases mature neutrophil and MDSC accumulation into the spleen to promote blood bacterial clearance. The study showed that in this 2-hit model, RvD2 promotes lung bacterial clearance, increased non-inflammatory alveolar macrophage number and inhibits an adaptive immune pathway providing evidence of its resolution mechanism in secondary pulmonary infection.
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Affiliation(s)
| | | | | | | | - Kingsley Yin
- Department of Cell Biology and Neuroscience, Rowan University School of Osteopathic Medicine, Stratford, NJ, United States
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Xu H, Xu S, Li L, Wu Y, Mai S, Xie Y, Tan Y, Li A, Xue F, He X, Li Y. Integrated metabolomics, network pharmacology and biological verification to reveal the mechanisms of Nauclea officinalis treatment of LPS-induced acute lung injury. Chin Med 2022; 17:131. [PMID: 36434729 PMCID: PMC9700915 DOI: 10.1186/s13020-022-00685-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Accepted: 11/07/2022] [Indexed: 11/27/2022] Open
Abstract
BACKGROUND Acute lung injury (ALI) is a severe inflammatory disease, underscoring the urgent need for novel treatments. Nauclea officinalis Pierre ex Pitard (Danmu in Chinese, DM) is effective in treating inflammatory respiratory diseases. However, there is still no evidence of its protective effect against ALI. METHODS Metabolomics was applied to identify the potential biomarkers and pathways in ALI treated with DM. Further, network pharmacology was introduced to predict the key targets of DM against ALI. Then, the potential pathways and key targets were further verified by immunohistochemistry and western blot assays. RESULTS DM significantly improved lung histopathological characteristics and inflammatory response in LPS-induced ALI. Metabolomics analysis showed that 16 and 19 differential metabolites were identified in plasma and lung tissue, respectively, and most of these metabolites tended to recover after DM treatment. Network pharmacology analysis revealed that the PI3K/Akt pathway may be the main signaling pathway of DM against ALI. The integrated analysis of metabolomics and network pharmacology identified 10 key genes. These genes are closely related to inflammatory response and cell apoptosis of lipopolysaccharide (LPS)-induced ALI in mice. Furthermore, immunohistochemistry and western blot verified that DM could regulate inflammatory response and cell apoptosis by affecting the PI3K/Akt pathway, and expression changes in Bax and Bcl-2 were also triggered. CONCLUSION This study first integrated metabolomics, network pharmacology and biological verification to investigate the potential mechanism of DM in treating ALI, which is related to the regulation of inflammatory response and cell apoptosis. And the integrated analysis can provide new strategies and ideas for the study of traditional Chinese medicines in the treatment of ALI.
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Affiliation(s)
- Han Xu
- grid.443397.e0000 0004 0368 7493Key Laboratory of Tropical Translational Medicine of Ministry of Education, Hainan Provincial Key Lab of R&D on Tropic Herbs, College of Pharmacy, Hainan Medical University, No. 3 Xueyuan Road, Hainan 571199 Haikou, People’s Republic of China
| | - Sicong Xu
- grid.443397.e0000 0004 0368 7493College of Biomedical Information and Engineering, Key Laboratory of Tropical Translational Medicine of Ministry of Education, Hainan Medical University, No. 3 Xueyuan Road, Haikou, 571199 Hainan People’s Republic of China
| | - Liyan Li
- grid.443397.e0000 0004 0368 7493Key Laboratory of Tropical Translational Medicine of Ministry of Education, Hainan Provincial Key Lab of R&D on Tropic Herbs, College of Pharmacy, Hainan Medical University, No. 3 Xueyuan Road, Hainan 571199 Haikou, People’s Republic of China
| | - Yuhuang Wu
- grid.443397.e0000 0004 0368 7493Key Laboratory of Tropical Translational Medicine of Ministry of Education, Hainan Provincial Key Lab of R&D on Tropic Herbs, College of Pharmacy, Hainan Medical University, No. 3 Xueyuan Road, Hainan 571199 Haikou, People’s Republic of China
| | - Shiying Mai
- grid.443397.e0000 0004 0368 7493Key Laboratory of Tropical Translational Medicine of Ministry of Education, Hainan Provincial Key Lab of R&D on Tropic Herbs, College of Pharmacy, Hainan Medical University, No. 3 Xueyuan Road, Hainan 571199 Haikou, People’s Republic of China
| | - Yiqiang Xie
- grid.443397.e0000 0004 0368 7493College of Chinese Medicine, Hainan Medical University, No. 3 Xueyuan Road, Haikou, 571199 Hainan People’s Republic of China
| | - Yinfeng Tan
- grid.443397.e0000 0004 0368 7493Key Laboratory of Tropical Translational Medicine of Ministry of Education, Hainan Provincial Key Lab of R&D on Tropic Herbs, College of Pharmacy, Hainan Medical University, No. 3 Xueyuan Road, Hainan 571199 Haikou, People’s Republic of China
| | - Ailing Li
- grid.443397.e0000 0004 0368 7493The Second Affiliated Hospital of Hainan Medical University, 368 Yehai Av., Haikou, 571199 Hainan People’s Republic of China
| | - Fengming Xue
- grid.443397.e0000 0004 0368 7493The Second Affiliated Hospital of Hainan Medical University, 368 Yehai Av., Haikou, 571199 Hainan People’s Republic of China
| | - Xiaoning He
- grid.443397.e0000 0004 0368 7493The Second Affiliated Hospital of Hainan Medical University, 368 Yehai Av., Haikou, 571199 Hainan People’s Republic of China
| | - Yonghui Li
- grid.443397.e0000 0004 0368 7493Key Laboratory of Tropical Translational Medicine of Ministry of Education, Hainan Provincial Key Lab of R&D on Tropic Herbs, College of Pharmacy, Hainan Medical University, No. 3 Xueyuan Road, Hainan 571199 Haikou, People’s Republic of China ,grid.443397.e0000 0004 0368 7493The Second Affiliated Hospital of Hainan Medical University, 368 Yehai Av., Haikou, 571199 Hainan People’s Republic of China
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Bretones ML, Sampaio SC, Barbeiro DF, Ariga SKK, Soriano FG, Lima TMD. Crotoxin modulates inflammation and macrophages' functions in a murine sepsis model. Toxicon 2022; 216:132-138. [PMID: 35850256 DOI: 10.1016/j.toxicon.2022.07.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Revised: 06/23/2022] [Accepted: 07/12/2022] [Indexed: 11/19/2022]
Abstract
Sepsis is a syndrome of physiological and biochemical abnormalities induced by an infection that represents a major public health concern. It involves the early activation of inflammatory responses. Crotoxin (CTX), the major toxin of the South American rattlesnake Crotalus durissus terrificus venom, presents longstanding anti-inflammatory properties. Since immune system modulation may be a strategic target in sepsis management, and macrophages' functional and secretory activities are related to the disease's progression, we evaluated the effects of CTX on macrophages from septic animals. Balb/c male mice submitted to cecal ligation and puncture (CLP) were treated with CTX (0.9 μg/animal, subcutaneously) 1 h after the procedure and euthanized after 6 h. We used plasma samples to quantify circulating cytokines and eicosanoids. Bone marrow differentiated macrophages (BMDM) were used to evaluate the CTX effect on macrophages' functions. Our data show that CTX administration increased the survival rate of the animals from 40% to 80%. Septic mice presented lower plasma concentrations of IL-6 and TNF-α after CTX treatment, and higher concentrations of LXA4, PGE2, and IL-1β. No effect was observed in IL-10, IFN-γ, and RD1 concentrations. BMDM from septic mice treated with CTX presented decreased capacity of E. coli phagocytosis, but sustained NO and H2O2 production. We also observed higher IL-6 concentration in the culture medium of BMDM from septic mice, and CTX induced a significant reduction. CTX treatment increased IL-10 production by macrophages as well. Our data show that the protective effect of CTX in sepsis mortality involves modulation of macrophage functions and inflammatory mediators' production.
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Affiliation(s)
- Marisa Langeani Bretones
- Laboratório de Emergências Clínicas (LIM51), Faculdade de Medicina da Universidade de São Paulo, Brazil
| | | | - Denise Frediani Barbeiro
- Laboratório de Emergências Clínicas (LIM51), Faculdade de Medicina da Universidade de São Paulo, Brazil
| | - Suely K Kubo Ariga
- Laboratório de Emergências Clínicas (LIM51), Faculdade de Medicina da Universidade de São Paulo, Brazil
| | - Francisco Garcia Soriano
- Laboratório de Emergências Clínicas (LIM51), Faculdade de Medicina da Universidade de São Paulo, Brazil
| | - Thais Martins de Lima
- Laboratório de Emergências Clínicas (LIM51), Faculdade de Medicina da Universidade de São Paulo, Brazil.
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Manickam M, Meenakshisundaram S, Pillaiyar T. Activating endogenous resolution pathways by soluble epoxide hydrolase inhibitors for the management of COVID-19. Arch Pharm (Weinheim) 2022; 355:e2100367. [PMID: 34802171 PMCID: PMC9011438 DOI: 10.1002/ardp.202100367] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Revised: 10/30/2021] [Accepted: 11/02/2021] [Indexed: 12/12/2022]
Abstract
Anti-inflammatory, specialized proresolving mediators such as resolvins, protectins, maresins, and lipoxins derived from polyunsaturated acids may play a potential role in lung diseases as they protect different organs in animal disease models. Polyunsaturated fatty acids are an important resource for epoxy fatty acids (EET, EEQ, and EDP) that mediate a broad array of anti-inflammatory and proresolving mechanisms, such as mitigation of the cytokine storm. However, epoxy fatty acids are rapidly metabolized by soluble epoxide hydrolase (sEH). In animal studies, administration of sEH inhibitors (sEHIs) increases epoxy fatty acid levels, reduces lung inflammation, and improves lung function, making it a viable COVID-19 treatment approach. Thus, using sEHIs to activate endogenous resolution pathways might be a novel method to minimize organ damage in severe cases and improve outcomes in COVID-19 patients. This review focuses on the use of sEH inhibitors to activate endogenous resolution mechanisms for the treatment of COVID-19.
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Affiliation(s)
- Manoj Manickam
- Department of ChemistryPSG Institute of Technology and Applied ResearchCoimbatoreTamil NaduIndia
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Pavel P, Blunder S, Moosbrugger-Martinz V, Elias PM, Dubrac S. Atopic Dermatitis: The Fate of the Fat. Int J Mol Sci 2022; 23:2121. [PMID: 35216234 PMCID: PMC8880331 DOI: 10.3390/ijms23042121] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Revised: 02/09/2022] [Accepted: 02/11/2022] [Indexed: 12/12/2022] Open
Abstract
Atopic dermatitis (AD) is a chronic and relapsing inflammatory skin disease in which dry and itchy skin may develop into skin lesions. AD has a strong genetic component, as children from parents with AD have a two-fold increased chance of developing the disease. Genetic risk loci and epigenetic modifications reported in AD mainly locate to genes involved in the immune response and epidermal barrier function. However, AD pathogenesis cannot be fully explained by (epi)genetic factors since environmental triggers such as stress, pollution, microbiota, climate, and allergens also play a crucial role. Alterations of the epidermal barrier in AD, observed at all stages of the disease and which precede the development of overt skin inflammation, manifest as: dry skin; epidermal ultrastructural abnormalities, notably anomalies of the lamellar body cargo system; and abnormal epidermal lipid composition, including shorter fatty acid moieties in several lipid classes, such as ceramides and free fatty acids. Thus, a compelling question is whether AD is primarily a lipid disorder evolving into a chronic inflammatory disease due to genetic susceptibility loci in immunogenic genes. In this review, we focus on lipid abnormalities observed in the epidermis and blood of AD patients and evaluate their primary role in eliciting an inflammatory response.
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Affiliation(s)
- Petra Pavel
- Department of Dermatology, Venereology and Allergology, Medical University of Innsbruck, A-6020 Innsbruck, Austria; (P.P.); (S.B.); (V.M.-M.)
| | - Stefan Blunder
- Department of Dermatology, Venereology and Allergology, Medical University of Innsbruck, A-6020 Innsbruck, Austria; (P.P.); (S.B.); (V.M.-M.)
| | - Verena Moosbrugger-Martinz
- Department of Dermatology, Venereology and Allergology, Medical University of Innsbruck, A-6020 Innsbruck, Austria; (P.P.); (S.B.); (V.M.-M.)
| | - Peter M. Elias
- Department of Dermatology, University of California, San Francisco, CA 94115, USA;
| | - Sandrine Dubrac
- Department of Dermatology, Venereology and Allergology, Medical University of Innsbruck, A-6020 Innsbruck, Austria; (P.P.); (S.B.); (V.M.-M.)
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10
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Thornton JM, Yin K. Role of Specialized Pro-Resolving Mediators in Modifying Host Defense and Decreasing Bacterial Virulence. Molecules 2021; 26:molecules26226970. [PMID: 34834062 PMCID: PMC8618792 DOI: 10.3390/molecules26226970] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Revised: 11/05/2021] [Accepted: 11/15/2021] [Indexed: 12/12/2022] Open
Abstract
Bacterial infection activates the innate immune system as part of the host’s defense against invading pathogens. Host response to bacterial pathogens includes leukocyte activation, inflammatory mediator release, phagocytosis, and killing of bacteria. An appropriate host response requires resolution. The resolution phase involves attenuation of neutrophil migration, neutrophil apoptosis, macrophage recruitment, increased phagocytosis, efferocytosis of apoptotic neutrophils, and tissue repair. Specialized Pro-resolving Mediators (SPMs) are bioactive fatty acids that were shown to be highly effective in promoting resolution of infectious inflammation and survival in several models of infection. In this review, we provide insight into the role of SPMs in active host defense mechanisms for bacterial clearance including a new mechanism of action in which an SPM acts directly to reduce bacterial virulence.
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11
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Jordan PM, Werz O. Specialized pro-resolving mediators: biosynthesis and biological role in bacterial infections. FEBS J 2021; 289:4212-4227. [PMID: 34741578 DOI: 10.1111/febs.16266] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2021] [Revised: 09/05/2021] [Accepted: 11/04/2021] [Indexed: 12/29/2022]
Abstract
Acute inflammation caused by bacterial infections is an essential biological defence mechanism of the host in order to neutralize and clear the invaders and to return to homeostasis. Despite its protective function, inflammation may become persistent and uncontrolled, resulting in chronic diseases and tissue destruction as consequence of the unresolved inflammatory process. Therefore, spatiotemporal induction of endogenous inflammation resolution programs that govern bacterial clearance as well as tissue repair and regeneration, are of major importance in order to enable tissues to restore functions. Lipid mediators that are de-novo biosynthesized from polyunsaturated fatty acids (PUFAs) mainly by lipoxygenases and cyclooxygenases, critically regulate the initiation, the maintenance but also the resolution of infectious inflammation and tissue regeneration. The discovery of specialized pro-resolving mediators (SPMs) generated from omega-3 PUFAs stimulated intensive research in inflammation resolution, especially in infectious inflammation elicited by bacteria. SPMs are immunoresolvents that actively terminate inflammation by limiting neutrophil influx, stimulating phagocytosis, bacterial killing and clearance as well as efferocytosis of apoptotic neutrophils and cellular debris by macrophages. Moreover, SPMs prevent collateral tissue damage, promote tissue repair and regeneration and lower antibiotic requirement. Here, we review the biosynthesis of SPMs in bacterial infections and cover specific mechanisms of SPMs that govern the resolution of bacteria-initiated inflammation.
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Affiliation(s)
- Paul M Jordan
- Department of Pharmaceutical/Medicinal Chemistry, Institute of Pharmacy, Friedrich-Schiller-University Jena, Jena, Germany
| | - Oliver Werz
- Department of Pharmaceutical/Medicinal Chemistry, Institute of Pharmacy, Friedrich-Schiller-University Jena, Jena, Germany
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12
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Liu Y, Wei L, He C, Chen R, Meng L. Lipoxin A4 inhibits ovalbumin-induced airway inflammation and airway remodeling in a mouse model of asthma. Chem Biol Interact 2021; 349:109660. [PMID: 34537180 DOI: 10.1016/j.cbi.2021.109660] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Revised: 08/24/2021] [Accepted: 09/14/2021] [Indexed: 12/19/2022]
Abstract
Asthma is a chronic respiratory disease, which is characterized by airway inflammation, remodeling and airway hyperresponsiveness. Airway remodeling is caused by long-term inflammation of the airways. Lipoxin A4 (LXA4) is a natural eicosanoid with powerful anti-inflammatory properties, and has been shown to serve a critical role in orchestrating pulmonary inflammation and airway hyper-responsiveness in asthmatic mice. However, its effect on airway remodeling is unknown. Female BALB/c mice were used to establish a mouse model of asthma which were sensitized and challenged by ovalbumin (OVA). LXA4 was intranasally administrated prior to the challenge. The results of our study indicated that LXA4 suppressed the OVA-induced inflammatory cell infiltration and T helper type 2 (Th2) cytokines secretion in the mouse model of asthma. Characteristics of airway remodeling, such as thickening of the bronchial wall and smooth muscle, overdeposition of collagen, and overexpression of α-smooth muscle actin (α-SMA) and collagen-I were reversed by LXA4. Furthermore, LXA4 suppressed the aberrant activation of the signal transducer and activator of transcription 3 (STAT3) pathway in the lung tissues of asthmatic mice. In conclusion, these findings demonstrated that LXA4 alleviated allergic airway inflammation and remodeling in asthmatic mice, which may be related to the inhibition of STAT3 pathway.
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Affiliation(s)
- Yuanyuan Liu
- Department of Respiratory Medicine, The Second Affiliated Hospital of Shandong First Medical University, Taian, Shandong, 271000, China
| | - Li Wei
- Department of Respiratory Medicine, The Second Affiliated Hospital of Shandong First Medical University, Taian, Shandong, 271000, China
| | - Chao He
- Department of Gastrointestinal Surgery, Taian City Central Hospital, Taian, Shandong, China
| | - Ran Chen
- Department of Respiratory Medicine, The Second Affiliated Hospital of Shandong First Medical University, Taian, Shandong, 271000, China
| | - Ling Meng
- Department of Respiratory Medicine, The Second Affiliated Hospital of Shandong First Medical University, Taian, Shandong, 271000, China.
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13
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Morris G, Berk M, Walder K, O'Neil A, Maes M, Puri BK. The lipid paradox in neuroprogressive disorders: Causes and consequences. Neurosci Biobehav Rev 2021; 128:35-57. [PMID: 34118292 DOI: 10.1016/j.neubiorev.2021.06.017] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Revised: 04/27/2021] [Accepted: 06/06/2021] [Indexed: 02/07/2023]
Abstract
Chronic systemic inflammation is associated with an increased risk of cardiovascular disease in an environment of low low-density lipoprotein (LDL) and low total cholesterol and with the pathophysiology of neuroprogressive disorders. The causes and consequences of this lipid paradox are explored. Circulating activated neutrophils can release inflammatory molecules such as myeloperoxidase and the pro-inflammatory cytokines interleukin-1 beta, interleukin-6 and tumour necrosis factor-alpha. Since activated neutrophils are associated with atherosclerosis and cardiovascular disease and with major depressive disorder, bipolar disorder and schizophrenia, it seems reasonable to hypothesise that the inflammatory molecules released by them may act as mediators of the link between systemic inflammation and the development of atherosclerosis in neuroprogressive disorders. This hypothesis is tested by considering the association at a molecular level of systemic inflammation with increased LDL oxidation; increased small dense LDL levels; increased lipoprotein (a) concentration; secretory phospholipase A2 activation; cytosolic phospholipase A2 activation; increased platelet activation; decreased apolipoprotein A1 levels and function; decreased paroxonase-1 activity; hyperhomocysteinaemia; and metabolic endotoxaemia. These molecular mechanisms suggest potential therapeutic targets.
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Affiliation(s)
- Gerwyn Morris
- Deakin University, IMPACT - the Institute for Mental and Physical Health and Clinical Translation, School of Medicine, Barwon Health, Geelong, Australia
| | - Michael Berk
- Deakin University, IMPACT - the Institute for Mental and Physical Health and Clinical Translation, School of Medicine, Barwon Health, Geelong, Australia; Deakin University, CMMR Strategic Research Centre, School of Medicine, Geelong, Victoria, Australia; Orygen, The National Centre of Excellence in Youth Mental Health, the Department of Psychiatry and the Florey Institute for Neuroscience and Mental Health, University of Melbourne, Parkville, Victoria, Australia
| | - Ken Walder
- Deakin University, IMPACT - the Institute for Mental and Physical Health and Clinical Translation, School of Medicine, Barwon Health, Geelong, Australia
| | - Adrienne O'Neil
- Deakin University, IMPACT - the Institute for Mental and Physical Health and Clinical Translation, School of Medicine, Barwon Health, Geelong, Australia
| | - Michael Maes
- Deakin University, IMPACT - the Institute for Mental and Physical Health and Clinical Translation, School of Medicine, Barwon Health, Geelong, Australia; Department of Psychiatry, King Chulalongkorn University Hospital, Bangkok, Thailand
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14
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Zhu X, Peng X, Lin J, Zhang Y, He H, Zhao G. Lipoxin A4 activates ALX/FPR2 to attenuate inflammation in Aspergillus fumigatus keratitis. Int Immunopharmacol 2021; 96:107785. [PMID: 34162149 DOI: 10.1016/j.intimp.2021.107785] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2020] [Revised: 05/09/2021] [Accepted: 05/11/2021] [Indexed: 12/18/2022]
Abstract
PURPOSE To explore the anti-inflammatory effect of lipoxin A4 (LXA4) in Aspergillus fumigatus (A. fumigatus) keratitis and the underlying mechanisms. METHODS In A. fumigatus keratitis mouse models, enzyme-linked immunosorbent assay (ELISA) was used to detect the level of LXA4. Clinical scores were utilized to evaluate fungal keratitis (FK) severity. Fungal load was assessed by plate count. Immunofluorescence staining, HE staining and myeloperoxidase (MPO) assays were carried out to evaluate the neutrophil infiltration and activity. In A. fumigatus infected mouse corneas and inactivated A. fumigatus-stimulated RAW264.7 cells, quantitative real time polymerase chain reaction (qRT-PCR) and ELISA were applied to assess the expression of pro-inflammatory mediators and anti-inflammatory factors.Reactive oxygen species (ROS) was determined by 2',7'-dichlorodihydrofluorescein diacetate (DCFH-DA) staining in RAW264.7 cells. RESULTS LXA4 level was significantly increased in mice with A. fumigatus keratitis. In an A. fumigatus keratitis mouse model, LXA4 treatment alleviated FK severity, reduced fungal load and repressed neutrophil infiltration and activity. Additionally, LXA4 inhibited the expression of pro-inflammatory mediators including IL-1β, TNF-α, IL-6, cyclooxygenase-2 (COX-2), TLR-2, TLR-4, Dectin-1 and iNOS, and promoted the expression of anti-inflammatory factors IL-10 and Arg-1. In RAW264.7 cells, LXA4 receptor/formyl peptide receptor 2 (ALX/FPR2) blockade reversed the anti-inflammatory effect of LXA4. LXA4 suppressed inactivated A. fumigatus induced elevated ROS production in RAW264.7 cells, which was abrogated by ALX/FPR2 antagonist Boc-2. CONCLUSION LXA4 ameliorated inflammatory response by suppressing neutrophil infiltration, downregulating the expression of pro-inflammatory mediators and ROS production through ALX/FPR2 receptor in A. fumigatus keratitis.
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15
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Cioccari L, Luethi N, Masoodi M. Lipid Mediators in Critically Ill Patients: A Step Towards Precision Medicine. Front Immunol 2020; 11:599853. [PMID: 33324417 PMCID: PMC7724037 DOI: 10.3389/fimmu.2020.599853] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [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: 08/28/2020] [Accepted: 10/26/2020] [Indexed: 12/15/2022] Open
Abstract
A dysregulated response to systemic inflammation is a common pathophysiological feature of most conditions encountered in the intensive care unit (ICU). Recent evidence indicates that a dysregulated inflammatory response is involved in the pathogenesis of various ICU-related disorders associated with high mortality, including sepsis, acute respiratory distress syndrome, cerebral and myocardial ischemia, and acute kidney injury. Moreover, persistent or non-resolving inflammation may lead to the syndrome of persistent critical illness, characterized by acquired immunosuppression, catabolism and poor long-term functional outcomes. Despite decades of research, management of many disorders in the ICU is mostly supportive, and current therapeutic strategies often do not take into account the heterogeneity of the patient population, underlying chronic conditions, nor the individual state of the immune response. Fatty acid-derived lipid mediators are recognized as key players in the generation and resolution of inflammation, and their signature provides specific information on patients' inflammatory status and immune response. Lipidomics is increasingly recognized as a powerful tool to assess lipid metabolism and the interaction between metabolic changes and the immune system via profiling lipid mediators in clinical studies. Within the concept of precision medicine, understanding and characterizing the individual immune response may allow for better stratification of critically ill patients as well as identification of diagnostic and prognostic biomarkers. In this review, we provide an overview of the role of fatty acid-derived lipid mediators as endogenous regulators of the inflammatory, anti-inflammatory and pro-resolving response and future directions for use of clinical lipidomics to identify lipid mediators as diagnostic and prognostic markers in critical illness.
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Affiliation(s)
- Luca Cioccari
- Department of Intensive Care Medicine, Inselspital, Bern University Hospital, Bern, Switzerland.,Australian and New Zealand Intensive Care Research Centre, School of Public Health and Preventive Medicine, Monash University, Prahran, VIC, Australia
| | - Nora Luethi
- Australian and New Zealand Intensive Care Research Centre, School of Public Health and Preventive Medicine, Monash University, Prahran, VIC, Australia.,Department of Emergency Medicine, Inselspital, Bern University Hospital, Bern, Switzerland
| | - Mojgan Masoodi
- Institute of Clinical Chemistry, Inselspital, Bern University Hospital, Bern, Switzerland
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16
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Thornton JM, Walker JM, Sundarasivarao PYK, Spur BW, Rodriguez A, Yin K. Lipoxin A4 promotes reduction and antibiotic efficacy against Pseudomonas aeruginosa biofilm. Prostaglandins Other Lipid Mediat 2020; 152:106505. [PMID: 33152529 DOI: 10.1016/j.prostaglandins.2020.106505] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Revised: 09/30/2020] [Accepted: 10/26/2020] [Indexed: 02/07/2023]
Abstract
Pseudomonas aeruginosa (P. aeruginosa) is an opportunistic bacterium commonly found in wound infections and airways of cystic fibrosis patients. P. aeruginosa readily forms biofilms which can reduce the efficacy of antibiotics used to eradicate the pathogen. We have previously shown that a Specialized Pro-resolving Mediator (SPM), Lipoxin A4 (LxA4) is a quorum sensing inhibitor which can reduce P. aeruginosa virulence. In this study, we examined the direct actions of LxA4 and RvD2 on P. aeruginosa biofilm formation and virulence gene expression. The influence of LxA4 on antibiotic efficacy and the combined effects on biofilm formation were also investigated. LxA4 and RvD2 reduced P. aeruginosa biofilm formation and virulence gene expression. LxA4 increased ciprofloxacin inhibition on biofilm formation but did not affect ciprofloxacin's action on non-adherent bacteria. On the other hand, LxA4 increased bacterial killing action of imipenem but did not affect imipenem's action on biofilm. We also found that LxA4 can increase ciprofloxacin's bacterial killing ability in established biofilm. Together these results suggest that LxA4 has direct effects on P. aeruginosa biofilm formation and can increase antibiotic efficacy directly.
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Affiliation(s)
- J M Thornton
- Department of Cell Biology and Neuroscience, Rowan University School of Osteopathic Medicine, Stratford, NJ, USA
| | - J M Walker
- Department of Cell Biology and Neuroscience, Rowan University School of Osteopathic Medicine, Stratford, NJ, USA
| | - P Y Kadiyam Sundarasivarao
- Department of Cell Biology and Neuroscience, Rowan University School of Osteopathic Medicine, Stratford, NJ, USA
| | - B W Spur
- Department of Cell Biology and Neuroscience, Rowan University School of Osteopathic Medicine, Stratford, NJ, USA
| | - A Rodriguez
- Department of Cell Biology and Neuroscience, Rowan University School of Osteopathic Medicine, Stratford, NJ, USA
| | - K Yin
- Department of Cell Biology and Neuroscience, Rowan University School of Osteopathic Medicine, Stratford, NJ, USA.
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17
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Silva AR, Moraes BPT, Gonçalves-de-Albuquerque CF. Mediterranean Diet: Lipids, Inflammation, and Malaria Infection. Int J Mol Sci 2020; 21:ijms21124489. [PMID: 32599864 PMCID: PMC7350014 DOI: 10.3390/ijms21124489] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2019] [Revised: 02/05/2020] [Accepted: 02/15/2020] [Indexed: 12/11/2022] Open
Abstract
The Mediterranean diet (MedDiet) consists of consumption of vegetables and healthy oils and have beneficial effects on metabolic and inflammatory diseases. Our goal here is to discuss the role of fatty acid content in MedDiet, mostly omega-3, omega-6, and omega-9 on malaria. Malaria affects millions of people around the globe. The parasite Plasmodium causes the disease. The metabolic and inflammatory alterations in the severe forms have damaging consequences to the host. The lipid content in the MedDiet holds anti-inflammatory and pro-resolutive features in the host and have detrimental effects on the Plasmodium. The lipids from the diet impact the balance of pro- and anti-inflammation, thus, lipids intake from the diet is critical to parasite elimination and host tissue damage caused by an immune response. Herein, we go into the cellular and molecular mechanisms and targets of the MedDiet fatty acids in the host and the parasite, reviewing potential benefits of the MedDiet, on inflammation, malaria infection progression, and clinical outcome.
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Affiliation(s)
- Adriana R. Silva
- Laboratório de Imunofarmacologia, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz (FIOCRUZ), Rio de Janeiro 21040-900, Brazil;
- Programa de Neurociências da Universidade Federal Fluminense (UFF), Niterói 24020-141, Brazil
- Programa de Pós-Graduação em Biologia Celular e Molecular, Instituto Oswaldo Cruz, FIOCRUZ, Rio de Janeiro 21040-900, Brazil
- Correspondence: or (A.R.S.); or (C.F.G.-d.-A.)
| | - Bianca P. T. Moraes
- Laboratório de Imunofarmacologia, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz (FIOCRUZ), Rio de Janeiro 21040-900, Brazil;
- Programa de Neurociências da Universidade Federal Fluminense (UFF), Niterói 24020-141, Brazil
- Laboratório de Imunofarmacologia, Universidade Federal do Estado do Rio de Janeiro (UNIRIO), Rio de Janeiro 20210-010, Brazil
| | - Cassiano F. Gonçalves-de-Albuquerque
- Laboratório de Imunofarmacologia, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz (FIOCRUZ), Rio de Janeiro 21040-900, Brazil;
- Programa de Neurociências da Universidade Federal Fluminense (UFF), Niterói 24020-141, Brazil
- Laboratório de Imunofarmacologia, Universidade Federal do Estado do Rio de Janeiro (UNIRIO), Rio de Janeiro 20210-010, Brazil
- Programa de Pós-Graduação em Biologia Molecular e Celular, UNIRIO, Rio de Janeiro 20210-010, Brazil
- Correspondence: or (A.R.S.); or (C.F.G.-d.-A.)
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18
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19
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Abstract
SARS-CoV-2, SARS and MERS are all enveloped viruses that can cause acute respiratory syndrome. Arachidonic acid (AA) and other unsaturated fatty acids (especially eicosapentaenoic acd, EPA and docosahexaenoic acid DHA) are known to inactivate enveloped viruses and inhibit proliferation of various microbial organisms. The pro-inflammatory metabolites of AA and EPA such as prostaglandins, leukotrienes and thromboxanes induce inflammation whereas lipoxins, resolvins, protectins and maresins derived from AA, EPA and DHA not only suppress inflammation but also enhance would healing and augment phagocytosis of macrophages and other immunocytes and decrease microbial load. In view of these actions, it is suggested that AA and other unsaturated fatty acids and their metabolites may serve as endogenous anti-viral compounds and their deficiency may render humans susceptible to SARS-CoV-2, SARS and MERS and other similar viruses' infections. Hence, oral or intravenous administration of AA and other unsaturated fatty acids may aid in enhancing resistance and recovery from SARS-CoV-2, SARS and MERS infections.
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20
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Abstract
Our own studies and those of others have shown that defects in essential fatty acid (EFA) metabolism occurs in age-related disorders such as obesity, type 2 diabetes mellitus, hypertension, atherosclerosis, coronary heart disease, immune dysfunction and cancer. It has been noted that in all these disorders there could occur a defect in the activities of desaturases, cyclo-oxygenase (COX), and lipoxygenase (LOX) enzymes leading to a decrease in the formation of their long-chain products gamma-linolenic acid (GLA), arachidonic acid, eicosapentaenoic acid (EPA), docosapentaenoic acid (DPA) and docosahexaenoic acid (DHA). This leads to an increase in the production of pro-inflammatory prostaglandin E2 (PGE2), thromboxanes (TXs), and leukotrienes (LTs) and a decrease in anti-inflammatory lipoxin A4, resolvins, protectins and maresins. All these bioactive molecules are termed as bioactive lipids (BALs). This imbalance in the metabolites of EFAs leads to low-grade systemic inflammation and at times acute inflammatory events at specific local sites that trigger the development of various age-related disorders such as obesity, type 2 diabetes mellitus, hypertension, coronary heart disease, atherosclerosis, and immune dysfunction as seen in rheumatoid arthritis, lupus, nephritis and other localized inflammatory conditions. This evidence implies that methods designed to restore BALs to normal can prevent age-related disorders and enhance longevity and health.
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21
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Koutsogiannaki S, Hou L, Babazada H, Okuno T, Blazon-Brown N, Soriano SG, Yokomizo T, Yuki K. The volatile anesthetic sevoflurane reduces neutrophil apoptosis via Fas death domain-Fas-associated death domain interaction. FASEB J 2019; 33:12668-12679. [PMID: 31513427 DOI: 10.1096/fj.201901360r] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Sepsis remains a significant health care burden, with high morbidities and mortalities. Patients with sepsis often require general anesthesia for procedures and imaging studies. Knowing that anesthetic drugs can pose immunomodulatory effects, it would be critical to understand the impact of anesthetics on sepsis pathophysiology. The volatile anesthetic sevoflurane is a common general anesthetic derived from ether as a prototype. Using a murine sepsis model induced by cecal ligation and puncture surgery, we examined the impact of sevoflurane on sepsis outcome. Different from volatile anesthetic isoflurane, sevoflurane exposure significantly improved the outcome of septic mice. This was associated with less apoptosis in the spleen. Because splenic apoptosis was largely attributed to the apoptosis of neutrophils, we examined the effect of sevoflurane on FasL-induced neutrophil apoptosis. Sevoflurane exposure significantly attenuated apoptosis. Sevoflurane did not affect the binding of FasL to the extracellular domain of Fas receptor. Instead, in silico analysis suggested that sevoflurane would bind to the interphase between Fas death domain (DD) and Fas-associated DD (FADD). The effect of sevoflurane on Fas DD-FADD interaction was examined using fluorescence resonance energy transfer (FRET). Sevoflurane attenuated FRET efficiency, indicating that sevoflurane hindered the interaction between Fas DD and FADD. The predicted sevoflurane binding site is known to play a significant role in Fas DD-FADD interaction, supporting our in vitro and in vivo apoptosis results.-Koutsogiannaki, S., Hou, L., Babazada, H., Okuno, T., Blazon-Brown, N., Soriano, S. G., Yokomizo, T., Yuki, K. The volatile anesthetic sevoflurane reduces neutrophil apoptosis via Fas death domain-Fas-associated death domain interaction.
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Affiliation(s)
- Sophia Koutsogiannaki
- Cardiac Anesthesia Division, Department of Anesthesiology, Critical Care, and Pain Medicine, Boston Children's Hospital, Boston, Massachusetts, USA.,Department of Anaesthesia, Harvard Medical School, Boston, Massachusetts, USA
| | - Lifei Hou
- Cardiac Anesthesia Division, Department of Anesthesiology, Critical Care, and Pain Medicine, Boston Children's Hospital, Boston, Massachusetts, USA.,Department of Anaesthesia, Harvard Medical School, Boston, Massachusetts, USA
| | - Hasan Babazada
- Department of Radiology, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Toshiaki Okuno
- Department of Biochemistry, Juntendo University Faculty of Medicine, Tokyo, Japan
| | - Nathan Blazon-Brown
- Cardiac Anesthesia Division, Department of Anesthesiology, Critical Care, and Pain Medicine, Boston Children's Hospital, Boston, Massachusetts, USA
| | - Sulpicio G Soriano
- Cardiac Anesthesia Division, Department of Anesthesiology, Critical Care, and Pain Medicine, Boston Children's Hospital, Boston, Massachusetts, USA.,Department of Anaesthesia, Harvard Medical School, Boston, Massachusetts, USA
| | - Takehiko Yokomizo
- Department of Biochemistry, Juntendo University Faculty of Medicine, Tokyo, Japan
| | - Koichi Yuki
- Cardiac Anesthesia Division, Department of Anesthesiology, Critical Care, and Pain Medicine, Boston Children's Hospital, Boston, Massachusetts, USA.,Department of Anaesthesia, Harvard Medical School, Boston, Massachusetts, USA
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22
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Ba F, Zhou X, Zhang Y, Wu C, Xu S, Wu L, Li J, Yin Y, Gu X. Lipoxin A4 ameliorates alveolar fluid clearance disturbance in lipopolysaccharide-induced lung injury via aquaporin 5 and MAPK signaling pathway. J Thorac Dis 2019; 11:3599-3608. [PMID: 31559067 DOI: 10.21037/jtd.2019.08.86] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Background A characteristic of acute lung injury (ALI) is the inflammatory damage of alveolar fluid transport. Lipoxins are endogenous lipids involving in the resolution of inflammation. It is found that lipoxin A4 (LXA4) has the distinct properties to improve the anti-edema and pro-resolution function in inflammation. Since aquaporins (AQPs) have essential roles in the integrity of barrier function during fluid transport, especially AQP5 in the maintaining of the epithelium permeability, the current study is aimed to evaluate the potential role of LXA4 in regulating alveolar fluid clearance (AFC) during fluid transport and the corresponding change of AQP5 in the lung. Methods ALI was induced by the lipopolysaccharide (LPS) intraperitoneal injection, and LXA4 treatment was given 8 hours after LPS administration. We investigated changes in the capacity of AFC, pro-inflammatory cytokine concentrations in bronchoalveolar lavage fluid (BALF) and the severity of ALI. Then AQP5 expression in lung tissue and potential regulatory pathways in LPS-induced ALI was explored. Results LXA4 treatment was found to inhibit AFC capacity, inflammatory cytokine release, partially, alleviate ALI severity, and restored AQP5 expression partially. Additionally, we found that LXA4 played a protective role by the inhibition of the phosphorylation of p38 and JNK. Conclusions In summary, our results suggest that LXA4 plays a protective role in lipopolysaccharide-induced ALI by restoring AFC capacity and upregulating AQP5 expression and inhibiting the phosphorylation of p38 and JNK. These findings suggest potential new mechanism of LXA4 as anti-inflammation therapy for the impairment of alveolar fluid transport in ALI.
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Affiliation(s)
- Fang Ba
- Department of Rehabilitation, Shengjing Hospital of China Medical University, Shenyang 110004, China
| | - Xiaoming Zhou
- Department of Respiratory Medicine, Shengjing Hospital of China Medical University, Shenyang 110004, China
| | - Yingqi Zhang
- Department of Respiratory Medicine, Shengjing Hospital of China Medical University, Shenyang 110004, China
| | - Cen Wu
- Department of Respiratory Medicine, Shengjing Hospital of China Medical University, Shenyang 110004, China
| | - Shenqian Xu
- Department of Respiratory Medicine, Shengjing Hospital of China Medical University, Shenyang 110004, China
| | - Liqin Wu
- Department of Respiratory Medicine, Shengjing Hospital of China Medical University, Shenyang 110004, China
| | - Jiayang Li
- Department of Respiratory Medicine, Shengjing Hospital of China Medical University, Shenyang 110004, China
| | - Yan Yin
- Institute of Respiratory Disease, First Hospital of China Medical University, Shenyang 110004, China
| | - Xiu Gu
- Department of Respiratory Medicine, Shengjing Hospital of China Medical University, Shenyang 110004, China
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23
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Lin XY, Gao LL, Wu M, Zhao T, Shen DL. [Protective effect of early intervention with lipoxin A4 on septic mice]. Zhongguo Dang Dai Er Ke Za Zhi 2019; 21:601-606. [PMID: 31208517 PMCID: PMC7389568 DOI: 10.7499/j.issn.1008-8830.2019.06.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Accepted: 05/07/2019] [Indexed: 06/09/2023]
Abstract
OBJECTIVE To study the effect of early intervention with lipoxin A4 (LXA4) on septic mice. METHODS Healthy male Balb/c mice aged 6-8 weeks were randomly divided into sham-operation group, sepsis group, 1-hour intervention group (intervention at 1 hour after sepsis), and 6-hour intervention group (intervention at 6 hours after sepsis) (n=8 each). A sepsis model was prepared by cecal ligation and puncture. The intervention groups received LXA4 at 0.01 μg/g body weight 1 or 6 hours after the model was established. Blood was taken from eyeballs at 24 hours after operation. Peritoneal lavage fluid and liver and lung tissue samples were collected. The bacterial colonies of whole blood and peritoneal lavage fluid were counted by dilution plating. The serum levels of tumor necrosis factor-α (TNF-α), interleukin-6 (IL-6), and monocyte chemoattractant protein-1 (MCP-1) were determined by cytometric bead array. The serum level of high mobility group box-1 (HGMB1) was determined using ELISA. The percentages of macrophages and neutrophils in peritoneal lavage fluid were determined by flow cytometry. Paraffin sectioning and hematoxylin-eosin staining were performed for the liver and lung tissue samples to observe pathological damage. RESULTS Compared with the sham-operation group, the sepsis group had a significantly decreased percentage of macrophages and a significantly increased percentage of neutrophils in peritoneal lavage fluid (P<0.05), as well as significantly increased serum levels of IL-6, TNF-α, MCP-1, and HMGB1 (P<0.05); in addition, the sepsis group showed more vacuolar degeneration, hepatocyte swelling, and inflammatory cell infiltration in liver tissue, and more capillary congestion, pulmonary septal thickening, inflammatory cell infiltration, and partial tissue destruction in lung tissue. Compared with the sepsis group, the 1-hour and 6-hour intervention groups had a significantly increased percentage of macrophages in peritoneal lavage fluid (P<0.05) and significantly reduced bacterial load in whole blood (P<0.05), serum levels of IL-6, TNF-α, MCP-1, and HMGB1 (P<0.05), and degree of liver and lung tissue damage and inflammatory cell infiltration, but there was no significant difference in the percentage of neutrophils and bacterial load in peritoneal lavage fluid (P>0.05). Compared with the 6-hour intervention group, the 1-hour intervention group had a significantly decreased serum level of HMGB1 (P<0.05), but there was no significant difference in other indicators between the two groups (P>0.05). CONCLUSIONS Early intervention with LXA4 may attenuate liver and lung injuries in septic mice, which may be explained by the decrease in serum levels of IL-6, TNF-α, MCP-1, and HMGB1, and it also may reduce the bacterial dissemination in the whole blood of septic mice, which may be explained by the increase in the percentage of peritoneal macrophages.
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Affiliation(s)
- Xing-Yun Lin
- The Generate School, Xuzhou Medical University, Xuzhou, Jiangsu 221000, China.
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Wu M, Feng Z, Liao J, Zhou H, Wang J. Dynamic changes and clinical significance of LXA 4 in the perioperative period of cardiopulmonary bypass. Exp Ther Med 2019; 17:3169-3173. [PMID: 30936990 PMCID: PMC6434242 DOI: 10.3892/etm.2019.7304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 07/19/2018] [Accepted: 02/08/2019] [Indexed: 11/05/2022] Open
Abstract
Dynamic changes in lipoxin A4 (LXA4) in child patients with congenital heart disease (CHD), in the perioperative period of cardiopulmonary bypass (CPB) were studied. Peripheral blood was collected from 16 child patients (CPB group) before operation (Tc), after operation (T0), at 1 day after operation (T1), at 3 days after operation (T3), and at 7 days after operation (T7); and from 17 children with no CHD (control group). The level of LXA4 in peripheral blood was detected via enzyme-linked immunosorbent assay (ELISA). Clinical data of the child patients were collected. The white blood cell (WBC) count, the proportion of neutrophils (N%) and high-sensitivity C-reactive protein (hs-CRP) levels were also detected, followed by statistical analysis. The plasma LXA4 levels in CPB group at Tc were significantly lower compared to that in the control group (P<0.01). In CPB group, the level of LXA4 showed an increasing trend at T0, WBC and hs-CRP were transiently increased at T0 and increased most significantly at T1. N% was obviously increased at T0 compared to that at Tc and was still significantly higher at T7 compared to that at Tc. The CPB time and aortic clamping time were positively correlated with the time in the Pediatric Intensive Care Unit (PICU), the application time of ventilator, and the hs-CRP level at T0. The LXA4 level at each time-point had no correlation with other indexes. In conclusion, the inflammatory response after CPB increases the synthesis of LXA4 with an anti-inflammatory effect, but LXA4 cannot be used as a sensitive index for monitoring inflammation.
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Affiliation(s)
- Ming Wu
- Department of Pediatrics, Xuzhou Medical University, Xuzhou, Jiangsu 221004, P.R. China.,Department of Pediatric Surgery, Children's Hospital of Soochow University, Suzhou, Jiangsu 215025, P.R. China
| | - Zongtai Feng
- Department of Pediatric Surgery, Children's Hospital of Soochow University, Suzhou, Jiangsu 215025, P.R. China
| | - Jianyi Liao
- Department of Pediatric Cardiology, Children's Hospital of Soochow University, Suzhou, Jiangsu 215025, P.R. China
| | - Huiting Zhou
- Institute of Pediatric Research, Children's Hospital of Soochow University, Suzhou, Jiangsu 215025, P.R. China
| | - Jian Wang
- Department of Pediatric Surgery, Children's Hospital of Soochow University, Suzhou, Jiangsu 215025, P.R. China
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Gan N, Zhang R, Xu X, Wang Y, Qi A, Zhang Y, Wang A. Effects of the ALX/FPR2 receptors of lipoxin A 4 on lung injury induced by fat embolism syndrome in rats. Biomed Pharmacother 2019; 112:108595. [PMID: 30784911 DOI: 10.1016/j.biopha.2019.01.056] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2018] [Revised: 01/09/2019] [Accepted: 01/16/2019] [Indexed: 10/27/2022] Open
Abstract
This study was designed to investigate the inflammatory responses in fat embolism syndrome (FES) and the relationship of ALX/FPR2 receptors and lipoxin A4 (LXA4) in FES models. In this model, lung injury score, lung tissue wet-to-dry (W/D) ratio and total protein concentration in bronchoalveolar lavage fluid (BALF) were increased compared with those of the control group. Meanwhile, the number of leukocytes and neutrophils was significantly increased in the FES group, as was the myeloperoxidase (MPO) activity and mRNA expression. In addition, the release of TNF-α and IL-1β was increased. Then, we explored whether LXA4 and ALX/FPR2 were involved in the pathological process of FES. The LXA4 concentration in the experimental groups was markedly higher than that in the control group. At the same time, the protein and mRNA levels of ALX/FPR2 were upregulated in the rat model of FES. Moreover, rats treated with BML-111, an agonist for the ALX/FPR2 receptor of LXA4, showed a lower inflammatory response than mice treated with fat alone. However, the role of BML-111 in fat emboli (FE)-induced acute lung injury (ALI) was attenuated by BOC-2, an antagonist of the ALX/FPR2 receptor of LXA4. Our results demonstrated that the inflammatory response may play an important role in the pathogenesis of FES and that the activation of the ALX/FPR2 receptor for LXA4 can decrease the inflammatory response and may be a therapeutic target for FE-induced ALI.
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Affiliation(s)
- Ning Gan
- Department of Anesthesiology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Rong Zhang
- Department of Anesthesiology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Xiaotao Xu
- Department of Anesthesiology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Yajie Wang
- Hebei Medical University, Shijiazhuang, Hebei, China
| | - Aihua Qi
- Department of Anesthesiology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Ying Zhang
- Department of Anesthesiology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Aizhong Wang
- Department of Anesthesiology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China.
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López-Muñoz RA, Molina-Berríos A, Campos-Estrada C, Abarca-Sanhueza P, Urrutia-Llancaqueo L, Peña-Espinoza M, Maya JD. Inflammatory and Pro-resolving Lipids in Trypanosomatid Infections: A Key to Understanding Parasite Control. Front Microbiol 2018; 9:1961. [PMID: 30186271 PMCID: PMC6113562 DOI: 10.3389/fmicb.2018.01961] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [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: 04/03/2018] [Accepted: 08/02/2018] [Indexed: 12/30/2022] Open
Abstract
Pathogenic trypanosomatids (Trypanosoma cruzi, Trypanosoma brucei, and Leishmania spp.) are protozoan parasites that cause neglected diseases affecting millions of people in Africa, Asia, and the Americas. In the process of infection, trypanosomatids evade and survive the immune system attack, which can lead to a chronic inflammatory state that induces cumulative damage, often killing the host in the long term. The immune mediators involved in this process are not entirely understood. Most of the research on the immunologic control of protozoan infections has been focused on acute inflammation. Nevertheless, when this process is not terminated adequately, permanent damage to the inflamed tissue may ensue. Recently, a second process, called resolution of inflammation, has been proposed to be a pivotal process in the control of parasite burden and establishment of chronic infection. Resolution of inflammation is an active process that promotes the normal function of injured or infected tissues. Several mediators are involved in this process, including eicosanoid-derived lipids, cytokines such as transforming growth factor (TGF)-β and interleukin (IL)-10, and other proteins such as Annexin-V. For example, during T. cruzi infection, pro-resolving lipids such as 15-epi-lipoxin-A4 and Resolvin D1 have been associated with a decrease in the inflammatory changes observed in experimental chronic heart disease, reducing inflammation and fibrosis, and increasing host survival. Furthermore, Resolvin D1 modulates the immune response in cells of patients with Chagas disease. In Leishmania spp. infections, pro-resolving mediators such as Annexin-V, lipoxins, and Resolvin D1 are related to the modulation of cutaneous manifestation of the disease. However, these mediators seem to have different roles in visceral or cutaneous leishmaniasis. Finally, although T. brucei infections are less well studied in terms of their relationship with inflammation, it has been found that arachidonic acid-derived lipids act as key regulators of the host immune response and parasite burden. Also, cytokines such as IL-10 and TGF-β may be related to increased infection. Knowledge about the inflammation resolution process is necessary to understand the host–parasite interplay, but it also offers an interesting opportunity to improve the current therapies, aiming to reduce the detrimental state induced by chronic protozoan infections.
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Affiliation(s)
- Rodrigo A López-Muñoz
- Instituto de Farmacología y Morfofisiología, Facultad de Ciencias Veterinarias, Universidad Austral de Chile, Valdivia, Chile
| | - Alfredo Molina-Berríos
- Instituto de Investigación en Ciencias Odontológicas, Facultad de Odontología, Universidad de Chile, Santiago, Chile
| | - Carolina Campos-Estrada
- Escuela de Química y Farmacia, Facultad de Farmacia, Universidad de Valparaíso, Valparaíso, Chile.,Centro de Investigación Farmacopea Chilena, Universidad de Valparaíso, Valparaíso, Chile
| | - Patricio Abarca-Sanhueza
- Programa de Farmacología Molecular y Clínica, Instituto de Ciencias Biomédicas, Facultad de Medicina, Universidad de Chile, Santiago, Chile
| | - Luis Urrutia-Llancaqueo
- Programa de Farmacología Molecular y Clínica, Instituto de Ciencias Biomédicas, Facultad de Medicina, Universidad de Chile, Santiago, Chile
| | - Miguel Peña-Espinoza
- Instituto de Farmacología y Morfofisiología, Facultad de Ciencias Veterinarias, Universidad Austral de Chile, Valdivia, Chile
| | - Juan D Maya
- Programa de Farmacología Molecular y Clínica, Instituto de Ciencias Biomédicas, Facultad de Medicina, Universidad de Chile, Santiago, Chile
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Das UN. Arachidonic acid in health and disease with focus on hypertension and diabetes mellitus: A review. J Adv Res 2018; 11:43-55. [PMID: 30034875 PMCID: PMC6052660 DOI: 10.1016/j.jare.2018.01.002] [Citation(s) in RCA: 66] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2017] [Revised: 01/01/2018] [Accepted: 01/02/2018] [Indexed: 02/06/2023] Open
Abstract
Arachidonic acid (AA 20:4n-6) is an essential component of cell membranes and modulates cell membrane fluidity. AA is metabolized by cyclo-oxygenase (COX), lipoxygenase (LOX) and cytochrome P450 enzymes to form several metabolites that have important biological actions. Of all the actions, role of AA in the regulation of blood pressure and its ability to prevent both type 1 and type 2 diabetes mellitus seems to be interesting. Studies showed that AA and its metabolites especially, lipoxin A4 (LXA4) and epoxyeicosatrienoic acids (EETs), potent anti-inflammatory metabolites, have a crucial role in the pathobiology of hypertension and diabetes mellitus. AA, LXA4 and EETs regulate smooth muscle function and proliferation, voltage gated ion channels, cell membrane fluidity, membrane receptors, G-coupled receptors, PPARs, free radical generation, nitric oxide formation, inflammation, and immune responses that, in turn, participate in the regulation blood pressure and pathogenesis of diabetes mellitus. In this review, role of AA and its metabolites LXA4 and EETs in the pathobiology of hypertension, pre-eclampsia and diabetes mellitus are discussed. Based on several lines of evidences, it is proposed that a combination of aspirin and AA could be of benefit in the prevention and management of hypertension, pre-eclampsia and diabetes mellitus.
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Chistiakov DA, Melnichenko AA, Grechko AV, Myasoedova VA, Orekhov AN. Potential of anti-inflammatory agents for treatment of atherosclerosis. Exp Mol Pathol 2018; 104:114-124. [PMID: 29378168 DOI: 10.1016/j.yexmp.2018.01.008] [Citation(s) in RCA: 90] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2017] [Revised: 12/30/2017] [Accepted: 01/17/2018] [Indexed: 12/23/2022]
Abstract
Chronic inflammation is a central pathogenic mechanism of atherosclerosis induction and progression. Vascular inflammation is associated with accelerated onset of late atherosclerosis complications. Atherosclerosis-related inflammation is mediated by a complex cocktail of pro-inflammatory cytokines, chemokines, bioactive lipids, and adhesion molecules, and blocking the key pro-atherogenic inflammatory mechanisms can be beneficial for treatment of atherosclerosis. Therapeutic agents that specifically target some of the atherosclerosis-related inflammatory mechanisms have been evaluated in preclinical and clinical studies. The most promising anti-inflammatory compounds for treatment of atherosclerosis include non-specific anti-inflammatory drugs, phospholipase inhibitors, blockers of major inflammatory cytokines, leukotrienes, adhesion molecules, and pro-inflammatory signaling pathways, such as CCL2-CCR2 axis or p38 MAPK pathway. Ongoing studies attempt evaluating therapeutic utility of these anti-inflammatory drugs for treatment of atherosclerosis. The obtained results are important for our understanding of atherosclerosis-related inflammatory mechanisms and for designing randomized controlled studies assessing the effect of specific anti-inflammatory strategies on cardiovascular outcomes.
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Affiliation(s)
- Dimitry A Chistiakov
- Department of Neurochemistry, Division of Basic and Applied Neurobiology, Serbsky Federal Medical Research Center of Psychiatry and Narcology, Moscow 119991, Russia
| | - Alexandra A Melnichenko
- Laboratory of Angiopathology, Institute of General Pathology and Pathophysiology, Russian Academy of Sciences, Moscow 125315, Russia
| | - Andrey V Grechko
- Federal Scientific Clinical Center for Resuscitation and Rehabilitation, Moscow 109240, Russia
| | - Veronika A Myasoedova
- Laboratory of Angiopathology, Institute of General Pathology and Pathophysiology, Russian Academy of Sciences, Moscow 125315, Russia
| | - Alexander N Orekhov
- Laboratory of Angiopathology, Institute of General Pathology and Pathophysiology, Russian Academy of Sciences, Moscow 125315, Russia; Institute for Atherosclerosis Research, Skolkovo Innovative Center, Moscow 121609, Russia.
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Pádua TA, Torres ND, Candéa ALP, Costa MFS, Silva JD, Silva‐Filho JL, Costa FTM, Rocco PRM, Souza MC, Henriques MG. Therapeutic effect of Lipoxin A
4
in malaria‐induced acute lung injury. J Leukoc Biol 2018; 103:657-670. [DOI: 10.1002/jlb.3a1016-435rrr] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2016] [Revised: 05/29/2017] [Accepted: 10/23/2017] [Indexed: 01/04/2023] Open
Affiliation(s)
- Tatiana A. Pádua
- Laboratory of Applied PharmacologyFarmanguinhos, Oswaldo Cruz Foundation Rio de Janeiro Brazil
- National Institute of Science and Technology of Innovation on Diseases of Neglected Populations (INCT‐IDPN) FIOCRUZ Rio de Janeiro Brazil
| | - Natalia D. Torres
- Laboratory of Applied PharmacologyFarmanguinhos, Oswaldo Cruz Foundation Rio de Janeiro Brazil
- National Institute of Science and Technology of Innovation on Diseases of Neglected Populations (INCT‐IDPN) FIOCRUZ Rio de Janeiro Brazil
| | - André L. P. Candéa
- Laboratory of Applied PharmacologyFarmanguinhos, Oswaldo Cruz Foundation Rio de Janeiro Brazil
- National Institute of Science and Technology of Innovation on Diseases of Neglected Populations (INCT‐IDPN) FIOCRUZ Rio de Janeiro Brazil
| | - Maria Fernanda Souza Costa
- Laboratory of Applied PharmacologyFarmanguinhos, Oswaldo Cruz Foundation Rio de Janeiro Brazil
- National Institute of Science and Technology of Innovation on Diseases of Neglected Populations (INCT‐IDPN) FIOCRUZ Rio de Janeiro Brazil
| | - Johnatas D. Silva
- Laboratory of Pulmonary InvestigationCarlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro Rio de Janeiro Brazil
| | - João Luiz Silva‐Filho
- Laboratory of Tropical Diseases – Prof. Dr. Luiz Jacintho da Silva, Department of Genetics, Evolution and Bioagents, Institute of Biology (IB)University of Campinas (UNICAMP) Campinas Brazil
| | - Fabio T. M. Costa
- Laboratory of Tropical Diseases – Prof. Dr. Luiz Jacintho da Silva, Department of Genetics, Evolution and Bioagents, Institute of Biology (IB)University of Campinas (UNICAMP) Campinas Brazil
| | - Patricia R. M. Rocco
- Laboratory of Pulmonary InvestigationCarlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro Rio de Janeiro Brazil
| | - Mariana C. Souza
- Laboratory of Applied PharmacologyFarmanguinhos, Oswaldo Cruz Foundation Rio de Janeiro Brazil
- National Institute of Science and Technology of Innovation on Diseases of Neglected Populations (INCT‐IDPN) FIOCRUZ Rio de Janeiro Brazil
| | - Maria G. Henriques
- Laboratory of Applied PharmacologyFarmanguinhos, Oswaldo Cruz Foundation Rio de Janeiro Brazil
- National Institute of Science and Technology of Innovation on Diseases of Neglected Populations (INCT‐IDPN) FIOCRUZ Rio de Janeiro Brazil
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Das UN. Arachidonic acid and other unsaturated fatty acids and some of their metabolites function as endogenous antimicrobial molecules: A review. J Adv Res 2018; 11:57-66. [PMID: 30034876 PMCID: PMC6052656 DOI: 10.1016/j.jare.2018.01.001] [Citation(s) in RCA: 105] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2017] [Revised: 01/01/2018] [Accepted: 01/01/2018] [Indexed: 12/13/2022] Open
Abstract
Our body is endowed with several endogenous anti-microbial compounds such as interferon, cytokines, free radicals, etc. However, little attention has been paid to the possibility that lipids could function as antimicrobial compounds. In this short review, the antimicrobial actions of various polyunsaturated fatty acids (PUFAs, mainly free acids) and their putative mechanisms of action are described. In general, PUFAs kill microbes by their direct action on microbial cell membranes, enhancing generation of free radicals, augmenting the formation of lipid peroxides that are cytotoxic, and by increasing the formation of their bioactive metabolites, such as prostaglandins, lipoxins, resolvins, protectins and maresins that enhance the phagocytic action of leukocytes and macrophages. Higher intakes of α-linolenic and cis-linoleic acids (ALA and LA respectively) and fish (a rich source of eicosapentaenoic acid and docosahexaenoic acid) might reduce the risk pneumonia. Previously, it was suggested that polyunsaturated fatty acids (PUFAs): linoleic, α-linolenic, γ-linolenic (GLA), dihomo-GLA (DGLA), arachidonic (AA), eicosapentaenoic (EPA), and docosahexaenoic acids (DHA) function as endogenous anti-bacterial, anti-fungal, anti-viral, anti-parasitic, and immunomodulating agents. A variety of bacteria are sensitive to the growth inhibitory actions of LA and ALA in vitro. Hydrolyzed linseed oil can kill methicillin-resistant Staphylococcus aureus. Both LA and AA have the ability to inactivate herpes, influenza, Sendai, and Sindbis virus within minutes of contact. AA, EPA, and DHA induce death of Plasmodium falciparum both in vitro and in vivo. Prostaglandin E1 (PGE1) and prostaglandin A (PGA), derived from DGLA, AA, and EPA inhibit viral replication and show anti-viral activity. Oral mucosa, epidermal cells, lymphocytes and macrophages contain and release significant amounts of PUFAs on stimulation. PUFAs stimulate NADPH-dependent superoxide production by macrophages, neutrophils and lymphocytes to kill the invading microorganisms. Cytokines induce the release of PUFAs from cell membrane lipid pool, a potential mechanism for their antimicrobial action. AA, EPA, and DHA give rise to lipoxins (LXs), resolvins, protectins, and maresins that limit and resolve inflammation and have antimicrobial actions. Thus, PUFAs and their metabolites have broad antimicrobial actions.
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Abstract
The acute inflammatory response is host-protective to contain foreign invaders. Many of today's pharmacopeia that block pro-inflammatory chemical mediators can cause serious unwanted side effects such as immune suppression. Uncontrolled inflammation is now considered a pathophysiologic basis associated with many widely occurring diseases such as cardiovascular disease, neurodegenerative diseases, diabetes, obesity and asthma, as well as the classic inflammatory diseases, e.g. arthritis, periodontal diseases. The inflammatory response is designated to be a self-limited process that produces a superfamily of chemical mediators that stimulate resolution of inflammatory responses. Specialized proresolving mediators (SPM) uncovered in recent years are endogenous mediators that include omega-3-derived families resolvins, protectins and maresins, as well as arachidonic acid-derived (n-6) lipoxins that stimulate and promote resolution of inflammation, clearance of microbes, reduce pain and promote tissue regeneration via novel mechanisms. Here, we review recent evidence from human and preclinical animal studies, together with the structural and functional elucidation of SPM indicating the SPM as physiologic mediators and pharmacologic agonists that stimulate resolution of inflammation and infection. These results suggest that it is time to develop immunoresolvents as agonists for testing resolution pharmacology in nutrition and health as well as in human diseases and during surgery.
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Affiliation(s)
- Nan Chiang
- Center for Experimental Therapeutics and Reperfusion Injury, Department of Anesthesiology, Perioperative and Pain Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115, United States
| | - Charles N Serhan
- Center for Experimental Therapeutics and Reperfusion Injury, Department of Anesthesiology, Perioperative and Pain Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115, United States.
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Abstract
Inflammation, decreased levels of circulating endothelial nitric oxide (eNO) and brain-derived neurotrophic factor (BDNF), altered activity of hypothalamic neurotransmitters (including serotonin and vagal tone) and gut hormones, increased concentrations of free radicals, and imbalance in the levels of bioactive lipids and their pro- and anti-inflammatory metabolites have been suggested to play a role in diabetes mellitus (DM). Type 1 diabetes mellitus (type 1 DM) is due to autoimmune destruction of pancreatic β cells because of enhanced production of IL-6 and tumor necrosis factor-α (TNF-α) and other pro-inflammatory cytokines released by immunocytes infiltrating the pancreas in response to unknown exogenous and endogenous toxin(s). On the other hand, type 2 DM is due to increased peripheral insulin resistance secondary to enhanced production of IL-6 and TNF-α in response to high-fat and/or calorie-rich diet (rich in saturated and trans fats). Type 2 DM is also associated with significant alterations in the production and action of hypothalamic neurotransmitters, eNO, BDNF, free radicals, gut hormones, and vagus nerve activity. Thus, type 1 DM is because of excess production of pro-inflammatory cytokines close to β cells, whereas type 2 DM is due to excess of pro-inflammatory cytokines in the systemic circulation. Hence, methods designed to suppress excess production of pro-inflammatory cytokines may form a new approach to prevent both type 1 and type 2 DM. Roux-en-Y gastric bypass and similar surgeries ameliorate type 2 DM, partly by restoring to normal: gut hormones, hypothalamic neurotransmitters, eNO, vagal activity, gut microbiota, bioactive lipids, BDNF production in the gut and hypothalamus, concentrations of cytokines and free radicals that results in resetting glucose-stimulated insulin production by pancreatic β cells. Our recent studies suggested that bioactive lipids, such as arachidonic acid, eicosapentaneoic acid, and docosahexaenoic acid (which are unsaturated fatty acids) and their anti-inflammatory metabolites: lipoxin A4, resolvins, protectins, and maresins, may have antidiabetic actions. These bioactive lipids have anti-inflammatory actions, enhance eNO, BDNF production, restore hypothalamic dysfunction, enhance vagal tone, modulate production and action of ghrelin, leptin and adiponectin, and influence gut microbiota that may explain their antidiabetic action. These pieces of evidence suggest that methods designed to selectively deliver bioactive lipids to pancreatic β cells, gut, liver, and muscle may prevent type 1 and type 2 DM.
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Affiliation(s)
- Undurti N. Das
- BioScience Research Centre, Department of Medicine, Gayatri Vidya Parishad Hospital, GVP College of Engineering Campus, Visakhapatnam, India
- UND Life Sciences, Battle Ground, WA, United States
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Harasstani OA, Tham CL, Israf DA. Kaempferol and Chrysin Synergies to Improve Septic Mice Survival. Molecules 2017; 22:molecules22010092. [PMID: 28067837 PMCID: PMC6155733 DOI: 10.3390/molecules22010092] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2016] [Revised: 12/19/2016] [Accepted: 12/30/2016] [Indexed: 01/13/2023] Open
Abstract
Previously, we reported the role of synergy between two flavonoids—namely, chrysin and kaempferol—in inhibiting the secretion of a few major proinflammatory mediators such as tumor necrosis factor-alpha (TNF-α), prostaglandin E2 (PGE2), and nitric oxide (NO) from lipopolysaccharide (LPS)-induced RAW 264.7 cells. The present study aims to evaluate the effects of this combination on a murine model of polymicrobial sepsis induced by cecal ligation and puncture (CLP). Severe sepsis was induced in male ICR mice (n = 7) via the CLP procedure. The effects of chrysin and kaempferol combination treatment on septic mice were investigated using a 7-day survival study. The levels of key proinflammatory mediators and markers—such as aspartate aminotransferase (AST), TNF-α, and NO—in the sera samples of the septic mice were determined via ELISA and fluorescence determination at different time point intervals post-CLP challenge. Liver tissue samples from septic mice were harvested to measure myeloperoxidase (MPO) levels using a spectrophotometer. Moreover, intraperitoneal fluid (IPF) bacterial clearance and total leukocyte count were also assessed to detect any antibacterial effects exerted by chrysin and kaempferol, individually and in combination. Kaempferol treatment improved the survival rate of CLP-challenged mice by up to 16%. During this treatment, kaempferol expressed antibacterial, antiapoptotic and antioxidant activities through the attenuation of bacterial forming units, AST and NO levels, and increased polymorphonuclear leukocyte (PMN) count in the IPF. On the other hand, the chrysin treatment significantly reduced serum TNF-α levels. However, it failed to significantly improve the survival rate of the CLP-challenged mice. Subsequently, the kaempferol/chrysin combination treatment significantly improved the overall 7-day survival rate by 2-fold—up to 29%. Kaempferol and chrysin revealed some synergistic effects by acting individually upon multiple pathophysiological factors involved during sepsis. Although the kaempferol/chrysin combination did not exhibit significant antibacterial effects, it did exhibit anti-inflammatory and antioxidant activities, which translate to significant improvement in the survival rate of septic animals. These findings suggest the potential application of this combination treatment as a beneficial adjuvant supplement strategy in sepsis control.
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Affiliation(s)
- Omar A Harasstani
- Department of Biomedical Science, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, Serdang, 43400 Selangor, Malaysia.
| | - Chau Ling Tham
- Department of Biomedical Science, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, Serdang, 43400 Selangor, Malaysia.
| | - Daud A Israf
- Department of Biomedical Science, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, Serdang, 43400 Selangor, Malaysia.
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El-Tanbouly GS, El-Awady MS, Megahed NA, El-Kashef HA, Salem HA. The lipoxin A 4 agonist BML-111 attenuates acute hepatic dysfunction induced by cecal ligation and puncture in rats. Naunyn Schmiedebergs Arch Pharmacol 2016; 390:361-368. [PMID: 28035464 DOI: 10.1007/s00210-016-1335-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2016] [Accepted: 12/21/2016] [Indexed: 12/11/2022]
Abstract
Sepsis is a systemic inflammatory response associating severe infection leading to multi-organ failure, such as hepatic dysfunction. This study investigates the possible hepatoprotective effect of the lipoxin A4 agonist (BML-111) in cecal ligation and puncture (CLP) model in rats. Pretreatment with BML-111 (1 mg/kg, i.p., 1 h before CLP) protected against CLP-induced mortality after 24 h. BML-111 prevented marked inflammatory cells in liver tissues and decreased elevation in serum hepatic biomarkers [alanine aminotransferase (ALT), aspartate aminotransferase (AST), total bilirubin (TB), gamma-glutamyl transferase (γ-GT)] induced by CLP. Additionally, BML-111 attenuated elevated serum level of interleukin-6 (IL-6) and downregulated hepatic IL-6 mRNA expression. Meanwhile, BML-111 further increased serum IL-10 and upregulated hepatic IL-10 mRNA expression, while it downregulated hepatic mRNA expression of nuclear factor inhibitory protein kappa-B alpha (NFκBia), toll-like receptor-4 (TLR-4), and 5-lipooxygenase (5-LOX). Moreover, BML-111 prevented NF-κB/p65 nuclear translocation and activation. In conclusion, BML-111 attenuated CLP-induced acute hepatic dysfunction through its anti-inflammatory effect by decreasing NF-κB activity, TLR-4, and 5-LOX expression with subsequent decrease in pro-inflammatory IL-6 and elevation in anti-inflammatory IL-10.
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Affiliation(s)
- Ghada S El-Tanbouly
- Department of Pharmacology and Biochemistry, Faculty of Pharmacy, Delta University for Science and Technology, Gamasa, Egypt
| | - Mohammed S El-Awady
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Mansoura University, Mansoura, Egypt.
| | - Nermeen A Megahed
- Department of Pathology, Faculty of Medicine, Mansoura University, Mansoura, Egypt
| | - Hassan A El-Kashef
- Department of Pharmacology and Biochemistry, Faculty of Pharmacy, Delta University for Science and Technology, Gamasa, Egypt.,Department of Pharmacology and Toxicology, Faculty of Pharmacy, Mansoura University, Mansoura, Egypt
| | - Hatem A Salem
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Mansoura University, Mansoura, Egypt
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Das UN. Combination of aspirin with essential fatty acids is superior to aspirin alone to prevent or ameliorate sepsis or ARDS. Lipids Health Dis 2016; 15:206. [PMID: 27887602 PMCID: PMC5124295 DOI: 10.1186/s12944-016-0377-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2016] [Accepted: 11/15/2016] [Indexed: 12/28/2022] Open
Abstract
It has been suggested that aspirin may be of benefit in treating sepsis and ARDS in view of its ability to block cyclo-oxygenase-1 (COX-1) and COX-2 activities; inhibit nuclear factor kappa B (NF-κB); enhance the production of endothelial nitric oxide (eNO) and lipoxin A4 (LXA4). Our previous studies revealed that plasma phospholipid content of arachidonic acid (AA) and eicosapentaenoic acid (EPA) is low in patients with sepsis. This implies that beneficial actions of aspirin in sepsis and ARDS is unlikely to be obtained in view of deficiency of AA and EPA, the precursors of LXA4 and resolvins respectively that are potent anti-inflammatory compounds and enhancers of eNO generation. In view of this, I propose that a combination of aspirin and AA and EPA (and possibly, docosahexaenoic acid, DHA) is likely to be superior in the management of sepsis and ARDS compared to aspirin alone. This suggestion is supported by the recent observation that trauma patients with uncomplicated recoveries had higher resolvin pathway gene expression and lower gene expression ratios of leukotriene: resolvin pathways.
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Affiliation(s)
- Undurti N Das
- UND Life Sciences, 2020 S 360th St, # K-202, Federal Way, WA, 98003, USA. .,BioScience Research Centre, GVP College of Engineering Campus and Department of Medicine, GVP Hospital, Madhurawada, Visakhapatnam, 530 048, India.
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36
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Inoue Y, Yu YM, Kurihara T, Vasilyev A, Ibrahim A, Oklu R, Zhao G, Nair AV, Brown D, Fischman AJ, Tompkins RG, Irimia D. Kidney and Liver Injuries After Major Burns in Rats Are Prevented by Resolvin D2. Crit Care Med 2016; 44:e241-52. [PMID: 26509319 DOI: 10.1097/CCM.0000000000001397] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
OBJECTIVES Innate immune dysfunction after major burn injuries increases the susceptibility to organ failure. Lipid mediators of inflammation resolution, e.g., resolvin D2, have been shown recently to restore neutrophil functionality and reduce mortality rate in a rat model of major burn injury. However, the physiological mechanisms responsible for the benefic activity of resolvin D2 are not well understood. DESIGN Prospective randomized animal investigation. SETTING Academic research setting. SUBJECTS Wistar male rats. INTERVENTIONS Animals were subjected to a full-thickness burn of 30% total body surface area. Two hours after burn, 25 ng/kg resolvin D2 was administered IV and repeated every day, for 8 days. At day 10 post burn, 2 mg/kg of lipopolysaccharide was administered IV, and the presence of renal and hepatic injuries was evaluated at day 11 post burn by histology, immunohistochemistry, and relevant blood chemistry. MEASUREMENTS AND MAIN RESULTS In untreated animals, we found significant tissue damage in the kidneys and liver, consistent with acute tubular necrosis and multifocal necrosis, and changes in blood chemistry, reflecting the deterioration of renal and hepatic functions. We detected less tissue damage and significantly lower values of blood urea nitrogen (26.4 ± 2.1 vs 36.0 ± 9.3 mg/dL; p ≤ 0.001), alanine aminotransferase (266.5 ± 295.2 vs 861.8 ± 813.7 U/L; p ≤ 0.01), and total bilirubin (0.13 ± 0.05 vs 0.30 ± 0.14 mg/dL; p ≤ 0.01) in resolvin D2-treated rats than in untreated animals. The mean blood pressure of all animals was above 65 mm Hg, indicating adequate tissue perfusion throughout the experiments. We measured significantly larger amounts of chromatin in the circulation of untreated than of resolvin D2-treated rats (575.1 ± 331.0 vs 264.1 ± 122.4 ng/mL; p ≤ 0.05) and identified neutrophil extracellular traps in kidney and liver tissues from untreated rats, consistent with the tissue damage. CONCLUSIONS Pathologic changes in kidney and liver tissues in a rat model of major burn and endotoxin insults are ameliorated by resolvin D2.
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Cheng Q, Wang Z, Ma R, Chen Y, Yan Y, Miao S, Jiao J, Cheng X, Kong L, Ye D. Lipoxin A4 protects against lipopolysaccharide-induced sepsis by promoting innate response activator B cells generation. Int Immunopharmacol 2016; 39:229-235. [PMID: 27494686 DOI: 10.1016/j.intimp.2016.07.026] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2016] [Revised: 07/12/2016] [Accepted: 07/26/2016] [Indexed: 01/06/2023]
Abstract
Sepsis is a serious disease that leads to severe inflammation, dysregulation of immune system, multi-organ failure and death. Innate response activator (IRA) B cells, which produce granulocyte-macrophage colony-stimulating factor (GM-CSF), protect against microbial sepsis. Lipid mediator lipoxin A4 (LXA4) exerts anti-inflammatory and immunoregulatory effects, and it has been reported that LXA4 receptor ALX/FPR2 is expressed on B cells. Here, we investigated the potential role of LXA4 on IRA B cells in lipopolysaccharide (LPS)-induced sepsis. We found that LXA4 significantly promoted the expansion of splenic IRA B cells and increased GM-CSF expression in splenic B cells with LPS stimulation. After splenectomy, LXA4 treatment did not change the serum or peritoneal IL-1β, IL-6 and TNF-α levels in LPS-induced sepsis. LXA4 accelerated the migration of peritoneal B cells to spleen for their differentiation into IRA B cells, whereas this effect was independent of peritoneal macrophage. Furthermore, LXA4 enhanced the phosphorylation level of signal transducer and activator of transcription 5 (STAT5) in splenic B cells. These results suggest that LXA4 protects against LPS-induced sepsis by promoting the generation and migration of splenic IRA B cells, and the underlying molecular mechanism may be related to STAT5 activation. It might provide new insights and therapeutic approaches for treating sepsis.
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Affiliation(s)
- Qiong Cheng
- Department of Pathophysiology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China; Department of Pathology, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou, Henan 450003, China
| | - Zheng Wang
- Department of Biochemistry & Molecular Biology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Ruihua Ma
- Department of Pathophysiology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Yongtao Chen
- Department of Pathophysiology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Yan Yan
- Department of Pathophysiology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Shuo Miao
- Department of Pathophysiology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Jingyu Jiao
- Department of Pathophysiology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Xue Cheng
- Department of Pathophysiology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Lingfei Kong
- Department of Pathology, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou, Henan 450003, China
| | - Duyun Ye
- Department of Pathophysiology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China.
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38
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Wu B, Capilato J, Pham MP, Walker J, Spur B, Rodriguez A, Perez LJ, Yin K. Lipoxin A4 augments host defense in sepsis and reduces Pseudomonas aeruginosa virulence through quorum sensing inhibition. FASEB J 2016; 30:2400-10. [PMID: 26965685 DOI: 10.1096/fj.201500029r] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2015] [Accepted: 02/29/2016] [Indexed: 12/13/2022]
Abstract
Bacterial infections can quickly turn into sepsis, with its attendant clinical sequelae of inflammation, tissue injury, and organ failure. Paradoxically, sustained inflammation in sepsis may lead to immune suppression, because of which the host is unable to clear the existing infection. Use of agents that suppress the inflammatory response may accelerate host immune suppression, whereas use of traditional antibiotics does not significantly affect inflammation. In this study, we investigated whether lipoxin A4 (LXA4), a specialized, proresolution lipid mediator, could increase neutrophil phagocytic activity as well as reduce bacterial virulence. Using the mouse cecal ligation and puncture (CLP) model of sepsis, the administration of LXA4 (7 μg/kg i.v.) 1 h after surgery increased neutrophil phagocytic ability and Fcγ receptor I (CD64) expression. Ex vivo studies have confirmed that the direct addition of LXA4 to CLP neutrophils increased phagocytic ability but not CD64 expression. LXA4 did not affect neutrophils taken from control mice in which CD64 expression was minimal. Taken together with in vivo data, these results suggest that LXA4 directly augments CD64-mediated neutrophil phagocytic ability but does not directly increase neutrophil CD64 expression. Bacterial communication and virulence is regulated by quorum sensing inducers. In Pseudomonas aeruginosa, virulence is induced with release of various virulence factors, by N-3-oxododecanolyl homoserine lactone binding to the quorum sensing receptor, LasR. We show that LXA4 is an inhibitor of LasR in P. aeruginosa and that it decreases the release of pyocyanin exotoxin. These results suggest that LXA4 has the novel dual properties of increasing host defense and decreasing pathogen virulence by inhibiting quorum sensing.-Wu, B., Capilato, J., Pham, M. P., Walker, J., Spur, B., Rodriguez, A., Perez, L. J., Yin, K. Lipoxin A4 augments host defense in sepsis and reduces Pseudomonas aeruginosa virulence through quorum sensing inhibition.
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Affiliation(s)
- Benedict Wu
- Department of Cell Biology, Rowan University School of Osteopathic Medicine, Stratford, New Jersey, USA; and
| | - Joseph Capilato
- Department of Chemistry and Biochemistry, Rowan University, Glassboro, New Jersey, USA
| | - Michelle P Pham
- Department of Chemistry and Biochemistry, Rowan University, Glassboro, New Jersey, USA
| | - Jean Walker
- Department of Cell Biology, Rowan University School of Osteopathic Medicine, Stratford, New Jersey, USA; and
| | - Bernd Spur
- Department of Cell Biology, Rowan University School of Osteopathic Medicine, Stratford, New Jersey, USA; and
| | - Ana Rodriguez
- Department of Cell Biology, Rowan University School of Osteopathic Medicine, Stratford, New Jersey, USA; and
| | - Lark J Perez
- Department of Chemistry and Biochemistry, Rowan University, Glassboro, New Jersey, USA
| | - Kingsley Yin
- Department of Cell Biology, Rowan University School of Osteopathic Medicine, Stratford, New Jersey, USA; and
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