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Zhao Q, Chen H, Yang T, Rui W, Liu F, Zhang F, Zhao Y, Ding W. Direct effects of airborne PM2.5 exposure on macrophage polarizations. Biochim Biophys Acta Gen Subj 2016; 1860:2835-43. [PMID: 27041089 DOI: 10.1016/j.bbagen.2016.03.033] [Citation(s) in RCA: 84] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2015] [Revised: 03/16/2016] [Accepted: 03/22/2016] [Indexed: 11/29/2022]
Abstract
BACKGROUND Exposure of atmospheric particulate matter with an aerodynamic diameter less than 2.5μm (PM2.5) is epidemiologically associated with illnesses. Potential effects of air pollutants on innate immunity have raised concerns. As the first defense line, macrophages are able to induce inflammatory response. However, whether PM2.5 exposure affects macrophage polarizations remains unclear. METHODS We used freshly isolated macrophages as a model system to demonstrate effects of PM2.5 on macrophage polarizations. The expressions of cytokines and key molecular markers were detected by real-time PCR, and flow cytometry. The specific inhibitors and gene deletion technologies were used to address the molecular mechanisms. RESULTS PM2.5 increased the expression of pro-inflammatory cytokines granulocyte-macrophage colony-stimulating factor (GM-CSF), interleukin-6 (IL-6), interleukin-1β (IL-1β), tumor necrosis factor alpha (TNFα). PM2.5 also enhanced the lipopolysaccharide (LPS)-induced M1 polarization even though there was no evidence in the change of cell viability. However, PM2.5 significantly decreased the number of mitochondria in a dose dependent manner. Pre-treatment with NAC, a scavenger of reactive oxygen species (ROS), prevented the increase of ROS and rescued the PM2.5-impacted M1 but not M2 response. However, mTOR deletion partially rescued the effects of PM2.5 to reduce M2 polarization. CONCLUSIONS PM2.5 exposure significantly enhanced inflammatory M1 polarization through ROS pathway, whereas PM2.5 exposure inhibited anti-inflammatory M2 polarization through mTOR-dependent pathway. GENERAL SIGNIFICANCE The present studies suggested that short-term exposure of PM2.5 acts on the balance of inflammatory M1 and anti-inflammatory M2 macrophage polarizations, which may be involved in air pollution-induced immune disorders and diseases. This article is part of a Special Issue entitled Air Pollution, edited by Wenjun Ding, Andrew J. Ghio and Weidong Wu.
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Affiliation(s)
- Qingjie Zhao
- Laboratory of Environment and Health, College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China; State Key Laboratory of Membrane Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Hui Chen
- State Key Laboratory of Membrane Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Tao Yang
- State Key Laboratory of Membrane Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Wei Rui
- Laboratory of Environment and Health, College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Fang Liu
- Laboratory of Environment and Health, College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Fang Zhang
- Laboratory of Environment and Health, College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Yong Zhao
- State Key Laboratory of Membrane Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China.
| | - Wenjun Ding
- Laboratory of Environment and Health, College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China.
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52
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Kumar P, Swain MM, Pal A. Hyperglycemia-induced inflammation caused down-regulation of 8-oxoG-DNA glycosylase levels in murine macrophages is mediated by oxidative-nitrosative stress-dependent pathways. Int J Biochem Cell Biol 2016; 73:82-98. [DOI: 10.1016/j.biocel.2016.02.006] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2015] [Revised: 02/01/2016] [Accepted: 02/05/2016] [Indexed: 10/22/2022]
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53
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Lachmandas E, van den Heuvel CNAM, Damen MSMA, Cleophas MCP, Netea MG, van Crevel R. Diabetes Mellitus and Increased Tuberculosis Susceptibility: The Role of Short-Chain Fatty Acids. J Diabetes Res 2016; 2016:6014631. [PMID: 27057552 PMCID: PMC4709651 DOI: 10.1155/2016/6014631] [Citation(s) in RCA: 67] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/17/2015] [Accepted: 10/18/2015] [Indexed: 02/07/2023] Open
Abstract
Type 2 diabetes mellitus confers a threefold increased risk for tuberculosis, but the underlying immunological mechanisms are still largely unknown. Possible mediators of this increased susceptibility are short-chain fatty acids, levels of which have been shown to be altered in individuals with diabetes. We examined the influence of physiological concentrations of butyrate on cytokine responses to Mycobacterium tuberculosis (Mtb) in human peripheral blood mononuclear cells (PBMCs). Butyrate decreased Mtb-induced proinflammatory cytokine responses, while it increased production of IL-10. This anti-inflammatory effect was independent of butyrate's well-characterised inhibition of HDAC activity and was not accompanied by changes in Toll-like receptor signalling pathways, the eicosanoid pathway, or cellular metabolism. In contrast blocking IL-10 activity reversed the effects of butyrate on Mtb-induced inflammation. Alteration of the gut microbiota, thereby increasing butyrate concentrations, can reduce insulin resistance and obesity, but further studies are needed to determine how this affects susceptibility to tuberculosis.
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Affiliation(s)
- Ekta Lachmandas
- Department of Internal Medicine and Radboudumc Center for Infectious Diseases, Radboud University Medical Center, Internal Postal Code 463, P.O. Box 9101, 6500 HB Nijmegen, Netherlands
- *Ekta Lachmandas:
| | - Corina N. A. M. van den Heuvel
- Department of Internal Medicine and Radboudumc Center for Infectious Diseases, Radboud University Medical Center, Internal Postal Code 463, P.O. Box 9101, 6500 HB Nijmegen, Netherlands
| | - Michelle S. M. A. Damen
- Department of Internal Medicine and Radboudumc Center for Infectious Diseases, Radboud University Medical Center, Internal Postal Code 463, P.O. Box 9101, 6500 HB Nijmegen, Netherlands
| | - Maartje C. P. Cleophas
- Department of Internal Medicine and Radboudumc Center for Infectious Diseases, Radboud University Medical Center, Internal Postal Code 463, P.O. Box 9101, 6500 HB Nijmegen, Netherlands
| | - Mihai G. Netea
- Department of Internal Medicine and Radboudumc Center for Infectious Diseases, Radboud University Medical Center, Internal Postal Code 463, P.O. Box 9101, 6500 HB Nijmegen, Netherlands
| | - Reinout van Crevel
- Department of Internal Medicine and Radboudumc Center for Infectious Diseases, Radboud University Medical Center, Internal Postal Code 463, P.O. Box 9101, 6500 HB Nijmegen, Netherlands
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Zahr RS, Peterson RA, Polgreen LA, Cavanaugh JE, Hornick DB, Winthrop KL, Polgreen PM. Diabetes as an increasingly common comorbidity among patient hospitalizations for tuberculosis in the USA. BMJ Open Diabetes Res Care 2016; 4:e000268. [PMID: 27843553 PMCID: PMC5073569 DOI: 10.1136/bmjdrc-2016-000268] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/17/2016] [Revised: 08/03/2016] [Accepted: 09/05/2016] [Indexed: 12/17/2022] Open
Abstract
OBJECTIVE Diabetes is a risk factor for active tuberculosis (TB). The purpose of this paper was to estimate the risk of hospitalization for TB with and without a secondary diagnosis of diabetes in groups with different ethnic backgrounds. RESEARCH DESIGN AND METHODS We used the Nationwide Inpatient Sample from 1998 to 2011, identifying all patients with a primary diagnosis of TB and/or a secondary diagnosis of diabetes (type 1 or type 2) or HIV. Next, we performed logistic regression to investigate the association of diabetes status, HIV status, and race (and the interaction of diabetes and race) with the risk of hospitalization with a primary diagnosis of TB. We also included a time covariate, to determine whether potential risk factors changed during the study period. RESULTS Controlling for HIV status, diabetes did not increase the odds of TB in white and black patients. However, in Hispanic and Asian/Pacific Islander patients, diabetes increased the odds of TB by a factor of 1.7 (95% CI 1.51 to 1.83). Asian/Pacific Islanders who had diabetes but not HIV experienced 26.4 (95% CI 23.1 to 30.1) times the odds of TB relative to the white males without diabetes or HIV. In addition, the percent of TB cases that belong to these high-risk groups (Asian/Pacific Islander/Hispanic diabetics) has more than doubled from 4.6% in 1998 to 9.6% in 2011. CONCLUSIONS In specific demographic groups, diabetes was a strong risk factor for hospital admissions for TB.
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Affiliation(s)
- Roula S Zahr
- Department of Internal Medicine, University of Iowa, Iowa City, Iowa, USA
| | - Ryan A Peterson
- Department of Biostatistics, University of Iowa, Iowa City, Iowa, USA
| | - Linnea A Polgreen
- Department of Pharmacy Practice and Science, University of Iowa, Iowa City, Iowa, USA
| | | | - Douglas B Hornick
- Department of Internal Medicine, University of Iowa, Iowa City, Iowa, USA
| | - Kevin L Winthrop
- Department of Infectious Diseases, Ophthalmology, Public Health and Preventive Medicine, Oregon Health and Science University, Portland, Oregon, USA
| | - Philip M Polgreen
- Departments of Internal Medicine and Epidemiology, University of Iowa, Iowa City, Iowa, USA
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Relationship among Short and Long Term of Hypoinsulinemia-Hyperglycemia, Dermatophytosis, and Immunobiology of Mononuclear Phagocytes. Mediators Inflamm 2015; 2015:342345. [PMID: 26538824 PMCID: PMC4619976 DOI: 10.1155/2015/342345] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2015] [Revised: 06/27/2015] [Accepted: 07/26/2015] [Indexed: 12/22/2022] Open
Abstract
Dermatophytes are fungi responsible for causing superficial infections. In patients with diabetes mellitus (DM), dermatophytosis is usually more severe and recurrent. In the present study, we aimed to investigate the influence of short and long term hypoinsulinemia-hyperglycemia (HH) during experimental infection by Trichophyton mentagrophytes as well as alterations in the mononuclear phagocytes. Our results showed two distinct profiles of fungal outcome and immune response. Short term HH induced a discrete impaired proinflammatory response by peritoneal adherent cells (PAC) and a delayed fungal clearance. Moreover, long term HH mice showed low and persistent fungal load and a marked reduction in the production of TNF-α by PAC. Furthermore, while the inoculation of TM in non-HH mice triggered high influx of Gr1+ monocytes into the peripheral blood, long term HH mice showed low percentage of these cells. Thus, our results demonstrate that the time of exposure of HH interferes with the TM infection outcome as well as the immunobiology of mononuclear phagocytes, including fresh monocyte recruitment from bone marrow and PAC activity.
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TSC1 controls IL-1β expression in macrophages via mTORC1-dependent C/EBPβ pathway. Cell Mol Immunol 2015; 13:640-50. [PMID: 27593484 DOI: 10.1038/cmi.2015.43] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2014] [Revised: 04/23/2015] [Accepted: 04/23/2015] [Indexed: 02/08/2023] Open
Abstract
The tuberous sclerosis complex 1 (TSC1) is a tumor suppressor that inhibits the mammalian target of rapamycin (mTOR), which serves as a key regulator of inflammatory responses after bacterial stimulation in monocytes, macrophages, and primary dendritic cells. Previous studies have shown that TSC1 knockout (KO) macrophages produced increased inflammatory responses including tumor necrosis factor-α (TNF-α) and IL-12 to pro-inflammatory stimuli, but whether and how TSC1 regulates pro-IL-1β expression remains unclear. Here using a mouse model in which myeloid lineage-specific deletion of TSC1 leads to constitutive mTORC1 activation, we found that TSC1 deficiency resulted in impaired expression of pro-IL-1β in macrophages following lipopolysaccharide stimulation. Such decreased pro-IL-1β expression in TSC1 KO macrophages was rescued by reducing mTORC1 activity with rapamycin or deletion of mTOR. Rictor deficiency has no detectable effect on pro-IL-1β synthesis, suggesting that TSC1 positively controls pro-IL-1β expression through mTORC1 pathway. Moreover, mechanism studies suggest that mTORC1-mediated downregulation of the CCAAT enhancer-binding protein (C/EBPβ) critically contributes to the defective pro-IL-1β expression. Overall, these findings highlight a critical role of TSC1 in regulating innate immunity by control of the mTOR1-C/EBPβ pathway.
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57
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Wang C, Chen H, Luo H, Zhu L, Zhao Y, Tian H, Wang R, Shang P, Zhao Y. Microgravity activates p38 MAPK-C/EBPβ pathway to regulate the expression of arginase and inflammatory cytokines in macrophages. Inflamm Res 2015; 64:303-11. [PMID: 25804385 DOI: 10.1007/s00011-015-0811-3] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2014] [Revised: 01/24/2015] [Accepted: 02/10/2015] [Indexed: 01/10/2023] Open
Abstract
OBJECTIVE AND DESIGN Molecular mechanisms of microgravity-caused immunosuppression are not fully elucidated. In the present study, we investigated the effects of simulated microgravity on macrophage functions and tried to identify the related intracellular signal pathways. MATERIAL OR SUBJECTS Primary mouse macrophages were used in the present study. The gene expression and function of IL-4-treated mouse macrophages were detected after simulated microgravity or 1 g control. METHODS Freshly isolated primary mouse macrophages were cultured in a standard simulated microgravity situation using a rotary cell culture system (RCCS-1) and 1 g control conditions. Real-time PCR, western blots and flow cytometry were used to investigate the related intracellular signals and molecule expression. RESULTS The arginase mRNA and protein levels in freshly isolated primary mouse macrophages under simulated microgravity using RCCS-1 were significantly higher than those under normal gravity. Meanwhile, simulated microgravity induced over-expression of C/EBPβ, a transcription factor of arginase promoter, and activation of p38 MAPK, which could increase C/EBPβ expression. Furthermore, up-regulation of Interleukin-6 (IL-6) and down-regulation of IL-12 p40 (IL-12B) in LPS-stimulated macrophages were also detected after simulated microgravity, which is regulated by C/EBPβ. CONCLUSIONS Simulated microgravity activates a p38 MAPK-C/EBPβ pathway in macrophages to up-regulate arginase and IL-6 expression and down-regulate IL-12B expression. Both increased arginase expression and decreased IL-12B expression in macrophages during inflammation could result in immunosuppression under microgravity.
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Affiliation(s)
- Chongzhen Wang
- Transplantation Biology Research Division, State Key Laboratory of Biomembrane and Membrane Biotechnology, Institute of Zoology, Chinese Academy of Sciences, Beichen West Road 1-5, Chaoyang District, Beijing, 100101, China
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58
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The effect of hyperglycaemia on in vitro cytokine production and macrophage infection with Mycobacterium tuberculosis. PLoS One 2015; 10:e0117941. [PMID: 25664765 PMCID: PMC4322041 DOI: 10.1371/journal.pone.0117941] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2014] [Accepted: 01/02/2015] [Indexed: 12/21/2022] Open
Abstract
Type 2 diabetes mellitus is an established risk factor for tuberculosis but the underlying mechanisms are largely unknown. We examined the effects of hyperglycaemia, a hallmark of diabetes, on the cytokine response to and macrophage infection with Mycobacterium tuberculosis. Increasing in vitro glucose concentrations from 5 to 25 mmol/L had marginal effects on cytokine production following stimulation of peripheral blood mononuclear cells (PBMCs) with M. tuberculosis lysate, LPS or Candida albicans, while 40 mmol/L glucose increased production of TNF-α, IL-1β, IL-6 and IL-10, but not of IFN-γ, IL-17A and IL-22. Macrophage differentiation under hyperglycaemic conditions of 25 mmol/L glucose was also associated with increased cytokine production upon stimulation with M. tuberculosis lysate and LPS but in infection experiments no differences in M. tuberculosis killing or outgrowth was observed. The phagocytic capacity of these hyperglycaemic macrophages also remained unaltered. The fact that only very high glucose concentrations were able to significantly influence cytokine production by macrophages suggests that hyperglycaemia alone cannot fully explain the increased susceptibility of diabetes mellitus patients to tuberculosis.
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59
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Zhu L, Zhao Q, Yang T, Ding W, Zhao Y. Cellular metabolism and macrophage functional polarization. Int Rev Immunol 2014; 34:82-100. [PMID: 25340307 DOI: 10.3109/08830185.2014.969421] [Citation(s) in RCA: 263] [Impact Index Per Article: 26.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Macrophages are a functionally heterogeneous cell population that is mainly shaped by a variety of microenvironmental stimuli. Interferon γ (IFN-γ), interleukin-1β (IL-1β), and lipopolysaccharide (LPS) induce a classical activation of macrophages (M1), whereas IL-4 and IL-13 induce an alternative activation program in macrophages (M2). Reprogramming of intracellular metabolisms is required for the proper polarization and functions of activated macrophages. Similar to the Warburg effect observed in tumor cells, M1 macrophages increase glucose consumption and lactate release and decreased oxygen consumption rate. In comparison, M2 macrophages mainly employ oxidative glucose metabolism pathways. In addition, fatty acids, vitamins, and iron metabolisms are also related to macrophage polarization. However, detailed metabolic pathways involved in macrophages have remained elusive. Understanding the bidirectional interactions between cellular metabolism and macrophage functions in physiological and pathological situations and the regulatory pathways involved may offer novel therapies for macrophage-associated diseases.
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Affiliation(s)
- Linnan Zhu
- 1Transplantation Biology Research Division, State Key Laboratory of Biomembrane and Membrane Biotechnology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
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60
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Wang Z, Zhou S, Sun C, Lei T, Peng J, Li W, Ding P, Lu J, Zhao Y. Interferon-γ inhibits nonopsonized phagocytosis of macrophages via an mTORC1-c/EBPβ pathway. J Innate Immun 2014; 7:165-76. [PMID: 25277143 DOI: 10.1159/000366421] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2013] [Accepted: 08/05/2014] [Indexed: 01/07/2023] Open
Abstract
Bacterial infection often follows virus infection due to pulmonary interferon-γ (IFN-γ) production during virus infection, which down-regulates macrophage phagocytosis. The molecular mechanisms for this process are still poorly understood. In the present study, IFN-γ treatment significantly inhibited the ability of mouse macrophages to phagocytize nonopsonized chicken red blood cells (cRBCs), bacteria and beads in vitro, while it enhanced IgG- and complement-opsonized phagocytosis. IFN-γ treatment decreased the expression of MARCO (macrophage receptor with collagenous structure) in macrophages. Macrophages showed lower binding to and phagocytic ability of cRBCs when MARCO was blocked with antibody. In addition, IFN-γ induced high activity of mTOR (mammalian target of rapamycin) and decreased the expression of c/EBPβ (CCAAT enhancer-binding protein β) in macrophages. Rapamycin, a specific mTOR inhibitor, significantly reversed the inhibitory effect of IFN-γ on nonopsonized phagocytosis of macrophages and restored c/EBPβ and MARCO expression. Biochemical assays showed that c/EBPβ directly bound to the MARCO gene promoter. Rapamycin significantly hampered the viral-bacterial synergy and protected influenza-infected mice from subsequent bacterial infection. Thus, IFN-γ inhibited the nonopsonized phagocytosis of macrophages through the mTOR-c/EBPβ-MARCO pathway. The present study offered evidence indicating that mTOR may be one of the key target molecules for the prevention of secondary bacterial infection caused by primary virus infection.
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Affiliation(s)
- Zengfu Wang
- State Key Laboratory of Biomembrane and Membrane Biotechnology, Institute of Zoology, Chinese Academy of Sciences, Beijing, PR China
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61
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Zhu L, Yang T, Li L, Sun L, Hou Y, Hu X, Zhang L, Tian H, Zhao Q, Peng J, Zhang H, Wang R, Yang Z, Zhang L, Zhao Y. TSC1 controls macrophage polarization to prevent inflammatory disease. Nat Commun 2014; 5:4696. [PMID: 25175012 DOI: 10.1038/ncomms5696] [Citation(s) in RCA: 220] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2014] [Accepted: 07/15/2014] [Indexed: 12/29/2022] Open
Abstract
Macrophages acquire distinct phenotypes during tissue stress and inflammatory responses, but the mechanisms that regulate the macrophage polarization are poorly defined. Here we show that tuberous sclerosis complex 1 (TSC1) is a critical regulator of M1 and M2 phenotypes of macrophages. Mice with myeloid-specific deletion of TSC1 exhibit enhanced M1 response and spontaneously develop M1-related inflammatory disorders. However, TSC1-deficient mice are highly resistant to M2-polarized allergic asthma. Inhibition of the mammalian target of rapamycin (mTOR) fails to reverse the hypersensitive M1 response of TSC1-deficient macrophages, but efficiently rescues the defective M2 polarization. Deletion of mTOR also fails to reverse the enhanced inflammatory response of TSC1-deficient macrophages. Molecular studies indicate that TSC1 inhibits M1 polarization by suppressing the Ras GTPase-Raf1-MEK-ERK pathway in mTOR-independent manner, whereas TSC1 promotes M2 properties by mTOR-dependent CCAAT/enhancer-binding protein-β pathways. Overall, these findings define a key role for TSC1 in orchestrating macrophage polarization via mTOR-dependent and independent pathways.
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Affiliation(s)
- Linnan Zhu
- 1] State Key Laboratory of Biomembrane and Membrane Biotechnology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China [2]
| | - Tao Yang
- 1] State Key Laboratory of Biomembrane and Membrane Biotechnology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China [2]
| | - Longjie Li
- State Key Laboratory of Biomembrane and Membrane Biotechnology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
| | - Lina Sun
- State Key Laboratory of Biomembrane and Membrane Biotechnology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
| | - Yuzhu Hou
- State Key Laboratory of Biomembrane and Membrane Biotechnology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
| | - Xuelian Hu
- State Key Laboratory of Biomembrane and Membrane Biotechnology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
| | - Lianjun Zhang
- State Key Laboratory of Biomembrane and Membrane Biotechnology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
| | - Hongling Tian
- Department of Oncology, The Affiliated Zhongshan Hospital of Dalian University, Dalian 116001, China
| | - Qingjie Zhao
- State Key Laboratory of Biomembrane and Membrane Biotechnology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
| | - Jianxia Peng
- State Key Laboratory of Biomembrane and Membrane Biotechnology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
| | - Hongbing Zhang
- 1] National Laboratory of Medical Molecular Biology, Department of Physiology and Pathophysiology, Institute of Basic Medical Sciences and School of Basic Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100005, China [2] Institute of Cancer Stem Cell, Dalian Medical University, Dalian 116085, China
| | - Ruoyu Wang
- Department of Oncology, The Affiliated Zhongshan Hospital of Dalian University, Dalian 116001, China
| | - Zhongzhou Yang
- MOE Key Laboratory of Model Animal for Disease Study, Model Animal Research Center, Nanjing University, Nanjing 210093, China
| | - Lianfeng Zhang
- Key Laboratory of Human Diseases Comparative Medicine, Ministry of Health, Institute of Laboratory Animal Science, CAMS &PUMC, Beijing 100021, China
| | - Yong Zhao
- State Key Laboratory of Biomembrane and Membrane Biotechnology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
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Mynbaev OA, Eliseeva MY, Tinelli A, Malvasi A, Kosmas IP, Medvediev MV, Babenko TI, Mazitova MI, Kalzhanov ZR, Stark M. A personalized adhesion prevention strategy: E. Arslan, T. Talih, B. Oz, B. Halaclar, K. Caglayan, M. Sipahi, Comparison of lovastatin and hyaluronic acid/carboxymethyl cellulose on experimental created peritoneal adhesion model in rats, Int. J. Surg. 12 (2) (2014) 120-124. Int J Surg 2014; 12:901-5. [PMID: 25072704 DOI: 10.1016/j.ijsu.2014.03.022] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2014] [Revised: 03/02/2014] [Accepted: 03/14/2014] [Indexed: 11/26/2022]
Affiliation(s)
- O A Mynbaev
- The International Translational Medicine & Biomodeling Research Team, Department of Applied Mathematics, Moscow Institute of Physics & Technology (State University), Dolgoprudny, Moscow Region, Russia; The Department of Obstetrics, Gynecology & Reproductive Medicine, Peoples' Friendship, University of Russia, Moscow, Russia; Laboratory of Pilot Projects, Moscow State University of Medicine & Dentistry, Moscow, Russia; The New European Surgical Academy, Berlin, Germany.
| | - M Yu Eliseeva
- The Department of Obstetrics, Gynecology & Reproductive Medicine, Peoples' Friendship, University of Russia, Moscow, Russia
| | - A Tinelli
- Department of Obstetrics and Gynaecology, Division of Experimental Endoscopic Surgery, Imaging, Minimally Invasive Therapy and Technology, Vito Fazzi Hospital, Piazza Muratore, Lecce, Italy
| | - A Malvasi
- Department of Obstetrics and Gynecology, Santa Maria Hospital, Bari, Italy
| | - I P Kosmas
- Xatzikosta General Hospital, Ioannina, Ioannina, Greece
| | - M V Medvediev
- State Establishment "Dnepropetrovsk Medical Academy of Health Ministry of Ukraine", Dnepropetrovsk, Ukraine
| | - T I Babenko
- Stavropol State Medical Academy, Stavropol, Russia
| | | | - Zh R Kalzhanov
- School of Health and Human Sciences, University of Essex, UK
| | - M Stark
- The New European Surgical Academy, Berlin, Germany
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63
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Hou Y, Lin H, Zhu L, Liu Z, Hu F, Shi J, Yang T, Shi X, Guo H, Tan X, Zhang L, Wang Q, Li Z, Zhao Y. The inhibitory effect of IFN-γ on protease HTRA1 expression in rheumatoid arthritis. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2014; 193:130-8. [PMID: 24907345 DOI: 10.4049/jimmunol.1302700] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The high temperature requirement A1 (HTRA1) is a potent protease involved in many diseases, including rheumatoid arthritis (RA). However, the regulatory mechanisms that control HTRA1 expression need to be determined. In this study, we demonstrated that IFN-γ significantly inhibited the basal and LPS-induced HTRA1 expression in fibroblasts and macrophages, which are two major cells for HTRA1 production in RA. Importantly, the inhibitory effect of IFN-γ on HTRA1 expression was evidenced in collagen-induced arthritis (CIA) mouse models and in human RA synovial cells. In parallel with the enhanced CIA incidence and pathological changes in IFN-γ-deficient mice, HTRA1 expression in the joint tissues was also increased as determined by real-time PCR and Western blots. IFN-γ deficiency increased the incidence of CIA and the pathological severity in mice. Neutralization of HTRA1 by Ab significantly reversed the enhanced CIA frequency and severity in IFN-γ-deficient mice. Mechanistically, IFN-γ negatively controls HTRA1 expression through activation of p38 MAPK/STAT1 pathway. Dual luciferase reporter assay and chromatin immunoprecipitation analysis showed that STAT1 could directly bind to HTRA1 promoter after IFN-γ stimulation. This study offers new insights into the molecular regulation of HTRA1 expression and its role in RA pathogenesis, which may have significant impact on clinical therapy for RA and possibly other HTRA1-related diseases, including osteoarthritis, age-related macular degeneration, and cancer.
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MESH Headings
- Animals
- Arthritis, Rheumatoid/chemically induced
- Arthritis, Rheumatoid/genetics
- Arthritis, Rheumatoid/immunology
- Arthritis, Rheumatoid/metabolism
- Cell Line
- Collagen/toxicity
- Disease Models, Animal
- Gene Expression Regulation, Enzymologic/drug effects
- Gene Expression Regulation, Enzymologic/genetics
- Gene Expression Regulation, Enzymologic/immunology
- High-Temperature Requirement A Serine Peptidase 1
- Humans
- Interferon-gamma/genetics
- Interferon-gamma/immunology
- Interferon-gamma/metabolism
- Joints/immunology
- Joints/metabolism
- Joints/pathology
- Lipopolysaccharides/toxicity
- Mice
- Mice, Knockout
- Promoter Regions, Genetic/immunology
- STAT1 Transcription Factor/genetics
- STAT1 Transcription Factor/immunology
- STAT1 Transcription Factor/metabolism
- Serine Endopeptidases/biosynthesis
- Serine Endopeptidases/genetics
- Serine Endopeptidases/immunology
- p38 Mitogen-Activated Protein Kinases/genetics
- p38 Mitogen-Activated Protein Kinases/immunology
- p38 Mitogen-Activated Protein Kinases/metabolism
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Affiliation(s)
- Yuzhu Hou
- State Key Laboratory of Biomembrane and Membrane Biotechnology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Haijiang Lin
- Department of Ophthalmology, Massachusetts Eye and Ear Infirmary, Harvard Medical School, Boston, MA 02114
| | - Linnan Zhu
- State Key Laboratory of Biomembrane and Membrane Biotechnology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhaoting Liu
- State Key Laboratory of Biomembrane and Membrane Biotechnology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
| | - Fanlei Hu
- Department of Rheumatology and Immunology, Clinical Immunology Center, Peking University People's Hospital, Beijing 100044, China
| | - Jianfeng Shi
- State Key Laboratory of Biomembrane and Membrane Biotechnology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Tao Yang
- State Key Laboratory of Biomembrane and Membrane Biotechnology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiaoyun Shi
- State Key Laboratory of Biomembrane and Membrane Biotechnology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China; General Hospital of Chinese People's Armed Police Forces, Beijing 100039, China
| | - Huifang Guo
- Department of Rheumatology, Second Hospital of Hebei Medical University, Shijiazhuang 050000, China; and
| | - Xiaotian Tan
- State Key Laboratory of Biomembrane and Membrane Biotechnology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
| | - Lianfeng Zhang
- Key Laboratory of Human Diseases Comparative Medicine, Ministry of Health, and Institute of Laboratory Animal Science, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - Qiang Wang
- State Key Laboratory of Biomembrane and Membrane Biotechnology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China;
| | - Zhanguo Li
- Department of Rheumatology and Immunology, Clinical Immunology Center, Peking University People's Hospital, Beijing 100044, China;
| | - Yong Zhao
- State Key Laboratory of Biomembrane and Membrane Biotechnology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100049, China;
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Martinez N, Kornfeld H. Diabetes and immunity to tuberculosis. Eur J Immunol 2014; 44:617-26. [PMID: 24448841 DOI: 10.1002/eji.201344301] [Citation(s) in RCA: 148] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2013] [Revised: 01/08/2014] [Accepted: 01/15/2014] [Indexed: 02/06/2023]
Abstract
The dual burden of tuberculosis (TB) and diabetes has attracted much attention in the past decade as diabetes prevalence has increased dramatically in countries already afflicted with a high burden of TB. The confluence of these two major diseases presents a serious threat to global public health; at the same time it also presents an opportunity to learn more about the key elements of human immunity to TB that may be relevant to the general population. Some effects of diabetes on innate and adaptive immunity that are potentially relevant to TB defense have been identified, but have yet to be verified in humans and are unlikely to fully explain the interaction of these two disease states. This review provides an update on the clinical and epidemiological features of TB in the diabetic population and relates them to recent advances in understanding the mechanistic basis of TB susceptibility and other complications of diabetes. Issues that merit further investigation - such as geographic host and pathogen differences in the diabetes/TB interaction, the role of hyperglycemia-induced epigenetic reprogramming in immune dysfunction, and the impact of diabetes on lung injury and fibrosis caused by TB - are highlighted in this review.
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Affiliation(s)
- Nuria Martinez
- Department of Medicine, University of Massachusetts Medical School, Worcester, MA, USA
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65
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Li L, Li HS, Song NN, Chen HM. The immunotoxicity of dibutyl phthalate on the macrophages in mice. Immunopharmacol Immunotoxicol 2014; 35:272-81. [PMID: 23480346 DOI: 10.3109/08923973.2013.768267] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVE Dibutyl phthalate (DBP), a widely used phthalate chemical, is commonly used as plasticizer. It is well known that DBP causes reproductive and developmental diseases, but the effect of DBP on the immune system remains to be determined. We assessed the effect of DBP on immune functions of murine macrophages, which constitute a key component in the immune response. MATERIALS AND METHODS Murine peritoneal exudate macrophages (PEMs) were treated with 0, 1, 5, 10, 50 or 100 μM DBP in vitro for 24 h and then the viability of PEMs were measured by flow cytometry (FCM) and trypan blue count. To investigate the effect of DBP on the functions of PEMs, we treated the PEMs with moderate dose of DBP (0, 1, 5 or 10 μM) in vitro for 24 h. The phenotypes, phagocytosis and cytokine production of PEMs were measured by FCM or real-time PCR. The immunogenicity and antigen presenting capacity of PEMs treated with DBP in vitro were assessed both by the mixed lymphocytereaction (MLR) in vitro assay and through the injection of exposed cells in mice by the delayed-type hypersensitivity (DTH) assay. RESULTS High dose of DBP (50-100 μM) showed cytotoxicity on PEMs, whereas after the treatment with moderate dose of DBP (1-10 μM) in vitro, PEMs expressed low level of CD36, CD80 and MHC-II molecules, and showed significantly decreased phagocytosis on apoptotic cells and Escherichia coli. In addition, DBP treatment exhibited a decrease in the cytokine production, immunogenicity and antigen-presenting capacity of PEMs. CONCLUSIONS The present study shows the effects of DBP on macrophages, demonstrating immunogenicity and decreased antigen presentation in vitro.
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Affiliation(s)
- Lei Li
- Research Center for Import-Export Chemicals Safety of General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Chinese Academy of Inspection and Quarantine, Beijing, China
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66
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Sun B, Hu X, Liu G, Ma B, Xu Y, Yang T, Shi J, Yang F, Li H, Zhang L, Zhao Y. Phosphatase Wip1 negatively regulates neutrophil migration and inflammation. THE JOURNAL OF IMMUNOLOGY 2014; 192:1184-95. [PMID: 24395919 DOI: 10.4049/jimmunol.1300656] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Neutrophils are critically involved in host defense and tissue damage. Intrinsic signal mechanisms controlling neutrophil activities are poorly defined. We found that the expression of wild-type p53-induced phosphatase 1 (Wip1) in mouse and human neutrophils was downregulated quickly after neutrophil activation through JNK-microRNA-16 pathway. Importantly, the Wip1 expression level was negatively correlated with inflammatory cytokine productions of neutrophils in sepsis patients. Wip1-deficient mice displayed increased bactericidal activities to Staphylococcus aureus and were hypersensitive to LPS-induced acute lung damage with increased neutrophil infiltration and inflammation. Mechanism studies showed that the enhanced inflammatory activity of neutrophils caused by Wip1 deficiency was mediated by p38 MAPK-STAT1 and NF-κB pathways. The increased migration ability of Wip1KO neutrophils was mediated by the decreased CXCR2 internalization and desensitization, which was directly regulated by p38 MAPK activity. Thus, our findings identify a previously unrecognized function of Wip1 as an intrinsic negative regulator for neutrophil proinflammatory cytokine production and migration through multiple signal pathways.
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Affiliation(s)
- Bo Sun
- State Key Laboratory of Biomembrane and Membrane Biotechnology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
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67
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Xiu F, Stanojcic M, Diao L, Jeschke MG. Stress hyperglycemia, insulin treatment, and innate immune cells. Int J Endocrinol 2014; 2014:486403. [PMID: 24899891 PMCID: PMC4034653 DOI: 10.1155/2014/486403] [Citation(s) in RCA: 76] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/28/2014] [Revised: 04/06/2014] [Accepted: 04/08/2014] [Indexed: 01/04/2023] Open
Abstract
Hyperglycemia (HG) and insulin resistance are the hallmarks of a profoundly altered metabolism in critical illness resulting from the release of cortisol, catecholamines, and cytokines, as well as glucagon and growth hormone. Recent studies have proposed a fundamental role of the immune system towards the development of insulin resistance in traumatic patients. A comprehensive review of published literatures on the effects of hyperglycemia and insulin on innate immunity in critical illness was conducted. This review explored the interaction between the innate immune system and trauma-induced hypermetabolism, while providing greater insight into unraveling the relationship between innate immune cells and hyperglycemia. Critical illness substantially disturbs glucose metabolism resulting in a state of hyperglycemia. Alterations in glucose and insulin regulation affect the immune function of cellular components comprising the innate immunity system. Innate immune system dysfunction via hyperglycemia is associated with a higher morbidity and mortality in critical illness. Along with others, we hypothesize that reduction in morbidity and mortality observed in patients receiving insulin treatment is partially due to its effect on the attenuation of the immune response. However, there still remains substantial controversy regarding moderate versus intensive insulin treatment. Future studies need to determine the integrated effects of HG and insulin on the regulation of innate immunity in order to provide more effective insulin treatment regimen for these patients.
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Affiliation(s)
- Fangming Xiu
- Ross Tilley Burn Centre, Sunnybrook Health Sciences Centre, University of Toronto, 2075 Bayview Avenue, Room D704, Toronto, ON, Canada
| | - Mile Stanojcic
- Ross Tilley Burn Centre, Sunnybrook Health Sciences Centre, University of Toronto, 2075 Bayview Avenue, Room D704, Toronto, ON, Canada
- Sunnybrook Research Institute, University of Toronto, Toronto, ON, Canada M4N 3M5
| | - Li Diao
- Ross Tilley Burn Centre, Sunnybrook Health Sciences Centre, University of Toronto, 2075 Bayview Avenue, Room D704, Toronto, ON, Canada
- Sunnybrook Research Institute, University of Toronto, Toronto, ON, Canada M4N 3M5
| | - Marc G. Jeschke
- Ross Tilley Burn Centre, Sunnybrook Health Sciences Centre, University of Toronto, 2075 Bayview Avenue, Room D704, Toronto, ON, Canada
- Sunnybrook Research Institute, University of Toronto, Toronto, ON, Canada M4N 3M5
- Department of Surgery, Division of Plastic Surgery, Department of Immunology, University of Toronto, Toronto, ON, Canada
- *Marc G. Jeschke:
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Baudoin L, Issad T. O-GlcNAcylation and Inflammation: A Vast Territory to Explore. Front Endocrinol (Lausanne) 2014; 5:235. [PMID: 25620956 PMCID: PMC4288382 DOI: 10.3389/fendo.2014.00235] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/05/2014] [Accepted: 12/18/2014] [Indexed: 01/04/2023] Open
Abstract
O-GlcNAcylation is a reversible post-translational modification that regulates the activities of cytosolic and nuclear proteins according to glucose availability. This modification appears to participate in several hyperglycemia-associated complications. An important feature of metabolic diseases such as diabetes and obesity is the presence of a low-grade chronic inflammation that causes numerous complications. Hyperglycemia associated with the metabolic syndrome is known to promote inflammatory processes through different mechanisms including oxidative stress and abnormally elevated protein O-GlcNAcylation. However, the role of O-GlcNAcylation on inflammation remains contradictory. O-GlcNAcylation associated with hyperglycemia has been shown to increase nuclear factor κB (NFκB) transcriptional activity through different mechanisms. This could contribute in inflammation-associated diabetic complications. However, in other conditions such as acute vascular injury, O-linked N-acetyl glucosamine (O-GlcNAc) also exerts anti-inflammatory effects via inhibition of the NFκB pathway, suggesting a complex regulation of inflammation by O-GlcNAc. Moreover, whereas macrophages and monocytes exposed to high glucose for a long-term period developed a pro-inflammatory phenotype, the impact of O-GlcNAcylation in these cells remains unclear. A future challenge will be to clearly establish the role of O-GlcNAcylation in pro- and anti-inflammatory functions in macrophages.
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Affiliation(s)
- Léa Baudoin
- UMR8104, CNRS, Institut Cochin, Université Paris Descartes, Paris, France
- U1016, INSERM, Paris, France
| | - Tarik Issad
- UMR8104, CNRS, Institut Cochin, Université Paris Descartes, Paris, France
- U1016, INSERM, Paris, France
- *Correspondence: Tarik Issad, Department of Endocrinology, Metabolism and Diabetes, Institute Cochin, 22 rue Méchain, Paris 75014, France e-mail:
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Wang C, Luo H, Zhu L, Yang F, Chu Z, Tian H, Feng M, Zhao Y, Shang P. Microgravity inhibition of lipopolysaccharide-induced tumor necrosis factor-α expression in macrophage cells. Inflamm Res 2013; 63:91-8. [PMID: 24196691 DOI: 10.1007/s00011-013-0676-2] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2013] [Revised: 10/03/2013] [Accepted: 10/08/2013] [Indexed: 11/28/2022] Open
Abstract
OBJECTIVE AND DESIGN Microgravity environments in space can cause major abnormalities in human physiology, including decreased immunity. The underlying mechanisms of microgravity-induced inflammatory defects in macrophages are unclear. MATERIAL OR SUBJECTS RAW264.7 cells and primary mouse macrophages were used in the present study. Lipopolysaccharide (LPS)-induced cytokine expression in mouse macrophages was detected under either simulated microgravity or 1g control. METHODS Freshly isolated primary mouse macrophages and RAW264.7 cells were cultured in a standard simulated microgravity situation using a rotary cell culture system (RCCS-1) and 1g control conditions. The cytokine expression was determined by real-time PCR and ELISA assays. Western blots were used to investigate the related intracellular signals. RESULTS LPS-induced tumor necrosis factor-α (TNF-α) expression, but not interleukin-1β expression, in mouse macrophages was significantly suppressed under simulated microgravity. The molecular mechanism studies showed that LPS-induced intracellular signal transduction including phosphorylation of IKK and JNK and nuclear translocation of NF-κB in macrophages was identical under normal gravity and simulated microgravity. Furthermore, TNF-α mRNA stability did not decrease under simulated microgravity. Finally, we found that heat shock factor-1 (HSF1), a known repressor of TNF-α promoter, was markedly activated under simulated microgravity. CONCLUSIONS Short-term treatment with microgravity caused significantly decreased TNF-α production. Microgravity-activated HSF1 may contribute to the decreased TNF-α expression in macrophages directly caused by microgravity, while the LPS-induced NF-κB pathway is resistant to microgravity.
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Affiliation(s)
- Chongzhen Wang
- Transplantation Biology Research Division, State Key Laboratory of Biomembrane and Membrane Biotechnology, Institute of Zoology, Chinese Academy of Sciences, Beichen West Road 1-5, Chaoyang District, Beijing, 100101, China
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Hou Y, Lin H, Zhu L, Liu Z, Hu F, Shi J, Yang T, Shi X, Zhu M, Godley BF, Wang Q, Li Z, Zhao Y. Lipopolysaccharide Increases the Incidence of Collagen-Induced Arthritis in Mice Through Induction of Protease HTRA-1 Expression. ACTA ACUST UNITED AC 2013; 65:2835-46. [DOI: 10.1002/art.38124] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2012] [Accepted: 08/01/2013] [Indexed: 01/08/2023]
Affiliation(s)
- Yuzhu Hou
- State Key Laboratory of Biomembrane and Membrane Biotechnology, Institute of Zoology, and Chinese Academy of Sciences; Beijing China
| | | | - Linnan Zhu
- State Key Laboratory of Biomembrane and Membrane Biotechnology, Institute of Zoology, and Chinese Academy of Sciences; Beijing China
| | - Zhaoting Liu
- State Key Laboratory of Biomembrane and Membrane Biotechnology, Institute of Zoology, and Chinese Academy of Sciences; Beijing China
| | - Fanlei Hu
- Clinical Immunology Center and Peking University People's Hospital; Beijing China
| | - Jianfeng Shi
- State Key Laboratory of Biomembrane and Membrane Biotechnology, Institute of Zoology, and Chinese Academy of Sciences; Beijing China
| | - Tao Yang
- State Key Laboratory of Biomembrane and Membrane Biotechnology, Institute of Zoology, and Chinese Academy of Sciences; Beijing China
| | - Xiaoyun Shi
- State Key Laboratory of Biomembrane and Membrane Biotechnology, Institute of Zoology, Chinese Academy of Sciences, and General Hospital of Chinese People's Armed Police Forces; Beijing China
| | - Mingzhao Zhu
- Institute of Biophysics and Chinese Academy of Sciences; Beijing China
| | | | - Qiang Wang
- State Key Laboratory of Biomembrane and Membrane Biotechnology, Institute of Zoology, and Chinese Academy of Sciences; Beijing China
| | - Zhanguo Li
- Clinical Immunology Center and Peking University People's Hospital; Beijing China
| | - Yong Zhao
- State Key Laboratory of Biomembrane and Membrane Biotechnology, Institute of Zoology, and Chinese Academy of Sciences; Beijing China
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Johnson FK, Johnson RA, Peyton KJ, Shebib AR, Durante W. Arginase promotes skeletal muscle arteriolar endothelial dysfunction in diabetic rats. Front Immunol 2013; 4:119. [PMID: 23730303 PMCID: PMC3657690 DOI: 10.3389/fimmu.2013.00119] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2013] [Accepted: 05/04/2013] [Indexed: 11/18/2022] Open
Abstract
Endothelial dysfunction is a characteristic feature in diabetes that contributes to the development of vascular disease. Recently, arginase has been implicated in triggering endothelial dysfunction in diabetic patients and animals by competing with endothelial nitric oxide synthase for substrate l-arginine. While most studies have focused on the coronary circulation and large conduit blood vessels, the role of arginase in mediating diabetic endothelial dysfunction in other vascular beds has not been fully investigated. In the present study, we determined whether arginase contributes to endothelial dysfunction in skeletal muscle arterioles of diabetic rats. Diabetes was induced in male Sprague Dawley rats by streptozotocin injection. Four weeks after streptozotocin administration, blood glucose, glycated hemoglobin, and vascular arginase activity were significantly increased. In addition, a significant increase in arginase I and II mRNA expression was detected in gracilis muscle arterioles of diabetic rats compared to age-matched, vehicle control animals. To examine endothelial function, first-order gracilis muscle arterioles were isolated, cannulated in a pressure myograph system, exposed to graded levels of luminal flow, and internal vessel diameter measured. Increases in luminal flow (0–50 μL/min) caused progressive vasodilation in arterioles isolated from control, normoglycemic animals. However, flow-induced vasodilation was absent in arterioles obtained from streptozotocin-treated rats. Acute in vitro pretreatment of blood vessels with the arginase inhibitors Nω-hydroxy-nor-l-arginine or S-(2-boronoethyl)-l-cysteine restored flow-induced responses in arterioles from diabetic rats and abolished differences between diabetic and control animals. Similarly, acute in vitro pretreatment with l-arginine returned flow-mediated vasodilation in vessels from diabetic animals to that of control rats. In contrast, d-arginine failed to restore flow-induced dilation in arterioles isolated from diabetic animals. Administration of sodium nitroprusside resulted in a similar degree of dilation in arterioles isolated from control or diabetic rats. In conclusion, the present study identifies arginase as an essential mediator of skeletal muscle arteriolar endothelial dysfunction in diabetes. The ability of arginase to induce endothelial dysfunction in skeletal muscle arterioles may further compromise glucose utilization and facilitate the development of hypertension in diabetes.
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Affiliation(s)
- Fruzsina K Johnson
- Department of Physiology and Pharmacology, Lincoln Memorial University Harrogate, TN, USA
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Pernow J, Jung C. Arginase as a potential target in the treatment of cardiovascular disease: reversal of arginine steal? Cardiovasc Res 2013; 98:334-43. [DOI: 10.1093/cvr/cvt036] [Citation(s) in RCA: 204] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
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Wu T, Sun C, Chen Z, Zhen Y, Peng J, Qi Z, Yang X, Zhao Y. Smad3-Deficient CD11b+Gr1+Myeloid-Derived Suppressor Cells Prevent Allograft Rejection via the Nitric Oxide Pathway. THE JOURNAL OF IMMUNOLOGY 2012; 189:4989-5000. [DOI: 10.4049/jimmunol.1200068] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Altered polarization, morphology, and impaired innate immunity germane to resident peritoneal macrophages in mice with long-term type 2 diabetes. J Biomed Biotechnol 2012; 2012:867023. [PMID: 23093868 PMCID: PMC3469280 DOI: 10.1155/2012/867023] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2012] [Revised: 06/13/2012] [Accepted: 06/29/2012] [Indexed: 12/16/2022] Open
Abstract
Type 2 diabetes (T2D) is associated with perturbed innate immunity. Macrophages, bridging innate immunity and metabolic disturbances, play important roles in controlling immune homeostasis. However, the effect of long-term diabetic milieu (DM) on the functions and phenotypes of macrophages is still not clear. In this study, we used resident peritoneal macrophages (RPMs) from 5-month-old db/db mice to investigate the changes of macrophages. It was found that RPMs in db/db mice significantly reduced phagocytosis and adhesion capacity. After standardization with body weight, the number of F4/80+ RPMs markedly reduced in db/db mice, and, furthermore, the macrophages skewed to M2-polarizated macrophages. The results of morphology found that the RPMs shape of db/db mice was nearly round, but the RPMs shape of control mice was spindle-shaped and irregular. In this study, we found the cell numbers, morphology, and innate immunity functions of RPMs in 5-month-old type 2 diabetic mice (db/db mice) obtained by abdominal cavity lavage were significantly altered. Importantly, we also found the remarkably increased M2-RPMs in diabetic mice for the first time.
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The absence of MyD88 has no effect on the induction of alternatively activated macrophage during Fasciola hepatica infection. BMC Immunol 2011; 12:63. [PMID: 22074389 PMCID: PMC3226545 DOI: 10.1186/1471-2172-12-63] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2011] [Accepted: 11/11/2011] [Indexed: 01/04/2023] Open
Abstract
Background Alternatively activated macrophages (AAMϕ) play important roles in allergies and responses to parasitic infections. However, whether signaling through toll-like receptors (TLRs) plays any role in AAMϕ induction when young Fasciola hepatica penetrates the liver capsule and migrates through the liver tissue is still unclear. Results The data show that the lack of myeloid differentiation factor 88 (MyD88) has no effect on the AAMϕ derived from the bone marrow (BMMϕ) in vitro and does not impair the mRNA expression of arginase-1, resistin-like molecule (RELMα), and Ym1 in BMMϕs. The Th2 cytokine production bias in splenocytes was not significantly altered in F. hepatica-infected mice in the absence of MyD88 in vitro and in the pleural cavity lavage in vivo. In addition, MyD88-deficiency has no effect on the arginase production of the F. hepatica elicited macrophages (Fe Mϕs), production of RELMα and Ym1 proteins and mRNA expression of Ym1 and RELMα of macrophages in the peritoneal cavity 6 weeks post F. hepatica infection. Conclusions The absence of MyD88 has no effect on presence of AAMϕ 6 weeks post F. hepatica infection.
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