1
|
Ranjan R, Deng J, Chung S, Lee YG, Park GY, Xiao L, Joo M, Christman JW, Karpurapu M. The transcription factor nuclear factor of activated T cells c3 modulates the function of macrophages in sepsis. J Innate Immun 2014; 6:754-64. [PMID: 24970700 DOI: 10.1159/000362647] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2013] [Accepted: 04/03/2014] [Indexed: 01/16/2023] Open
Abstract
The role of the transcription factor nuclear factor of activated T cells (NFAT) was initially identified in T and B cell gene expression, but its role in regulating gene expression in macrophages during sepsis is not known. Our data show that NFATc3 regulates expression of inducible nitric oxide synthase (iNOS) in macrophages stimulated with lipopolysaccharide. Selective inhibition of NFAT by cyclosporine A and a competitive peptide inhibitor 11R-VIVIT inhibited endotoxin-induced expression of iNOS and nitric oxide (NO) release. Macrophages from NFATc3 knockout (KO) mice show reduced iNOS expression and NO release and attenuated bactericidal activity. Gel shift and chromatin immunoprecipitation assays show that endotoxin challenge increases NFATc3 binding to the iNOS promoter, resulting in transcriptional activation of iNOS. The binding of NFATc3 to the iNOS promoter is abolished by NFAT inhibitors. NFATc3 KO mice subjected to sepsis show that NFATc3 is necessary for bacterial clearance in mouse lungs during sepsis. Our study demonstrates for the first time that NFATc3 is necessary for macrophage iNOS expression during sepsis, which is essential for containment of bacterial infections.
Collapse
Affiliation(s)
- Ravi Ranjan
- Department of Medicine and Section of Pulmonary, Critical Care, Sleep and Allergy, Department of Medicine, University of Illinois, Chicago, Ill., USA
| | | | | | | | | | | | | | | | | |
Collapse
|
2
|
Serafini N, Dahdah A, Barbet G, Demion M, Attout T, Gautier G, Arcos-Fajardo M, Souchet H, Jouvin MH, Vrtovsnik F, Kinet JP, Benhamou M, Monteiro RC, Launay P. The TRPM4 channel controls monocyte and macrophage, but not neutrophil, function for survival in sepsis. THE JOURNAL OF IMMUNOLOGY 2012; 189:3689-99. [PMID: 22933633 DOI: 10.4049/jimmunol.1102969] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
A favorable outcome following acute bacterial infection depends on the ability of phagocytic cells to be recruited and properly activated within injured tissues. Calcium (Ca(2+)) is a ubiquitous second messenger implicated in the functions of many cells, but the mechanisms involved in the regulation of Ca(2+) mobilization in hematopoietic cells are largely unknown. The monovalent cation channel transient receptor potential melastatin (TRPM) 4 is involved in the control of Ca(2+) signaling in some hematopoietic cell types, but the role of this channel in phagocytes and its relevance in the control of inflammation remain unexplored. In this study, we report that the ablation of the Trpm4 gene dramatically increased mouse mortality in a model of sepsis induced by cecal ligation and puncture. The lack of the TRPM4 channel affected macrophage population within bacteria-infected peritoneal cavities and increased the systemic level of Ly6C(+) monocytes and proinflammatory cytokine production. Impaired Ca(2+) mobilization in Trpm4(-/-) macrophages downregulated the AKT signaling pathway and the subsequent phagocytic activity, resulting in bacterial overgrowth and translocation to the bloodstream. In contrast, no alteration in the distribution, function, or Ca(2+) mobilization of Trpm4(-/-) neutrophils was observed, indicating that the mechanism controlling Ca(2+) signaling differs among phagocytes. Our results thus show that the tight control of Ca(2+) influx by the TRPM4 channel is critical for the proper functioning of monocytes/macrophages and the efficiency of the subsequent response to infection.
Collapse
|
3
|
Ehrlich LS, Medina GN, Khan MB, Powell MD, Mikoshiba K, Carter CA. Activation of the inositol (1,4,5)-triphosphate calcium gate receptor is required for HIV-1 Gag release. J Virol 2010; 84:6438-51. [PMID: 20427533 PMCID: PMC2903246 DOI: 10.1128/jvi.01588-09] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2009] [Accepted: 04/18/2010] [Indexed: 11/20/2022] Open
Abstract
The structural precursor polyprotein, Gag, encoded by all retroviruses, including the human immunodeficiency virus type 1 (HIV-1), is necessary and sufficient for the assembly and release of particles that morphologically resemble immature virus particles. Previous studies have shown that the addition of Ca(2+) to cells expressing Gag enhances virus particle production. However, no specific cellular factor has been implicated as mediator of Ca(2+) provision. The inositol (1,4,5)-triphosphate receptor (IP3R) gates intracellular Ca(2+) stores. Following activation by binding of its ligand, IP3, it releases Ca(2+) from the stores. We demonstrate here that IP3R function is required for efficient release of HIV-1 virus particles. Depletion of IP3R by small interfering RNA, sequestration of its activating ligand by expression of a mutated fragment of IP3R that binds IP3 with very high affinity, or blocking formation of the ligand by inhibiting phospholipase C-mediated hydrolysis of the precursor, phosphatidylinositol-4,5-biphosphate, inhibited Gag particle release. These disruptions, as well as interference with ligand-receptor interaction using antibody targeted to the ligand-binding site on IP3R, blocked plasma membrane accumulation of Gag. These findings identify IP3R as a new determinant in HIV-1 trafficking during Gag assembly and introduce IP3R-regulated Ca(2+) signaling as a potential novel cofactor in viral particle release.
Collapse
Affiliation(s)
- Lorna S. Ehrlich
- Department of Molecular Genetics and Microbiology, Stony Brook University, Stony Brook, New York 11794, Department of Microbiology, Biochemistry and Immunology, Morehouse School of Medicine, Atlanta, Georgia 30310, RIKEN Institute, Saitama 351-0198, Japan
| | - Gisselle N. Medina
- Department of Molecular Genetics and Microbiology, Stony Brook University, Stony Brook, New York 11794, Department of Microbiology, Biochemistry and Immunology, Morehouse School of Medicine, Atlanta, Georgia 30310, RIKEN Institute, Saitama 351-0198, Japan
| | - Mahfuz B. Khan
- Department of Molecular Genetics and Microbiology, Stony Brook University, Stony Brook, New York 11794, Department of Microbiology, Biochemistry and Immunology, Morehouse School of Medicine, Atlanta, Georgia 30310, RIKEN Institute, Saitama 351-0198, Japan
| | - Michael D. Powell
- Department of Molecular Genetics and Microbiology, Stony Brook University, Stony Brook, New York 11794, Department of Microbiology, Biochemistry and Immunology, Morehouse School of Medicine, Atlanta, Georgia 30310, RIKEN Institute, Saitama 351-0198, Japan
| | - Katsuhiko Mikoshiba
- Department of Molecular Genetics and Microbiology, Stony Brook University, Stony Brook, New York 11794, Department of Microbiology, Biochemistry and Immunology, Morehouse School of Medicine, Atlanta, Georgia 30310, RIKEN Institute, Saitama 351-0198, Japan
| | - Carol A. Carter
- Department of Molecular Genetics and Microbiology, Stony Brook University, Stony Brook, New York 11794, Department of Microbiology, Biochemistry and Immunology, Morehouse School of Medicine, Atlanta, Georgia 30310, RIKEN Institute, Saitama 351-0198, Japan
| |
Collapse
|
4
|
Feske S. ORAI1 and STIM1 deficiency in human and mice: roles of store-operated Ca2+ entry in the immune system and beyond. Immunol Rev 2009; 231:189-209. [PMID: 19754898 DOI: 10.1111/j.1600-065x.2009.00818.x] [Citation(s) in RCA: 254] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Store-operated Ca2+ entry (SOCE) is a mechanism used by many cells types including lymphocytes and other immune cells to increase intracellular Ca2+ concentrations to initiate signal transduction. Activation of immunoreceptors such as the T-cell receptor, B-cell receptor, or Fc receptors results in the release of Ca2+ ions from endoplasmic reticulum (ER) Ca2+ stores and subsequent activation of plasma membrane Ca2+ channels such as the well-characterized Ca2+ release-activated Ca2+ (CRAC) channel. Two genes have been identified that are essential for SOCE: ORAI1 as the pore-forming subunit of the CRAC channel in the plasma membrane and stromal interaction molecule-1 (STIM1) sensing the ER Ca2+ concentration and activating ORAI1-CRAC channels. Intense efforts in the past several years have focused on understanding the molecular mechanism of SOCE and the role it plays for cell functions in vitro and in vivo. A number of transgenic mouse models have been generated to investigate the role of ORAI1 and STIM1 in immunity. In addition, mutations in ORAI1 and STIM1 identified in immunodeficient patients provide valuable insight into the role of both genes and SOCE. This review focuses on the role of ORAI1 and STIM1 in vivo, discussing the phenotypes of ORAI1- and STIM1-deficient human patients and mice.
Collapse
Affiliation(s)
- Stefan Feske
- Department of Pathology, New York University School of Medicine, New York, NY 10016, USA.
| |
Collapse
|
5
|
Abstract
Abstract
Fcγ receptors (FcγRs) on mononuclear phagocytes trigger autoantibody and immune complex–induced diseases through coupling the self-reactive immunoglobulin G (IgG) response to innate effector pathways, such as phagocytosis, and the recruitment of inflammatory cells. FcRγ-based activation is critical in the pathogenesis of these diseases, although the contribution of FcγR-mediated calcium signaling in autoimmune injury is unclear. Here we show that macrophages lacking the endoplasmic reticulum–resident calcium sensor, STIM1, cannot activate FcγR-induced Ca2+ entry and phagocytosis. As a direct consequence, STIM1 deficiency results in resistance to experimental immune thrombocytopenia and anaphylaxis, autoimmune hemolytic anemia, and acute pneumonitis. These results establish STIM1 as a novel and essential component of FcγR activation and also indicate that inhibition of STIM1-dependent signaling might become a new strategy to prevent or treat IgG-dependent immunologic diseases.
Collapse
|
6
|
Shen M, Yen A. Nicotinamide cooperates with retinoic acid and 1,25-dihydroxyvitamin D(3) to regulate cell differentiation and cell cycle arrest of human myeloblastic leukemia cells. Oncology 2009; 76:91-100. [PMID: 19127080 DOI: 10.1159/000188664] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2008] [Accepted: 08/19/2008] [Indexed: 11/19/2022]
Abstract
Nicotinamide, the amide derivative of vitamin B(3), cooperates with retinoic acid (RA), a form of vitamin A, and 1,25-dihydroxyvitamin D(3) (D3), to regulate cell differentiation and proliferation of human myeloblastic leukemia cells. In human myeloblastic leukemia cells, RA or D3 are known to cause MAPK signaling leading to myeloid or monocytic differentiation and G0 cell cycle arrest. In this process, RA or D3 induces the early expression of CD38, a receptor that causes ERK signaling and propels further differentiation. Our study demonstrates that nicotinamide in combination with RA or D3 affected induced expression levels of CD38, CD11b and CD14, suggesting a cooperative function of nicotinamide and RA or D3. Nicotinamide transiently retarded the initial RA- or D3-induced expression of CD38, which subsequently reached the same nearly 100% expression. Nicotinamide induced ERK activation and further enhanced the RA-induced ERK activation, but the D3-induced ERK activation was diminished by nicotinamide, although levels still exceeded those induced by RA, suggesting lineage-specific nicotinamide responses. Nicotinamide enhanced both RA- and D3-induced CD11b expression, inducible oxidative metabolism, and G0 cell cycle arrest, accelerating their induced occurrence in all instances. Consistent with this, the RA- or D3-induced downregulation of PARP was enhanced by nicotinamide. Nicotinamide thus regulated RA- or D3-induced differentiation and G0 arrest, causing a transient delay in certain early aspects of the progression to terminal differentiation but ultimately accelerating the occurrence of terminally, functionally differentiated G0 cells.
Collapse
Affiliation(s)
- Miaoqing Shen
- Department of Biomedical Sciences, Cornell University, Ithaca, N.Y. 14853, USA
| | | |
Collapse
|
7
|
Jin SW, Zhang L, Lian QQ, Yao SL, Wu P, Zhou XY, Xiong W, Ye DY. Close functional coupling between Ca2+ release-activated Ca2+ channels and reactive oxygen species production in murine macrophages. Mediators Inflamm 2007; 2006:36192. [PMID: 17392583 PMCID: PMC1775034 DOI: 10.1155/mi/2006/36192] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Aim. To investigate the role of Ca2+ release-activated Ca2+ (CRAC) channels in the ROS production in macrophages. Methods. The intracellular [Ca2+]i was analyzed by confocal laser microscopy. The production of ROS was assayed by flow cytometry. Results. Both LPS and thapsigargin induced an increase in intracellular [Ca2+]i, either in the presence or absence of extracellular Ca2+ in murine macrophages. The Ca2+ signal was sustained in the presence of external Ca2+ and only initiated a mild and transient rise in the absence of external Ca2+. CRAC channel inhibitor 2-APB completely suppressed the Ca2+ entry signal evoked by thapsigargin, and suppressed approximately 93% of the Ca2+ entry signal evoked by LPS. The increase in intracellular [Ca2+]i was associated with increased ROS production, which was completely abolished in the absence of extracellular Ca2+ or in the presence of CRAC channel inhibitors 2-APB and Gd3+. The mitochondrial uncoupler carbonyl cyanide p-trifluoromethoxy-phenylhydrazone and the inhibitor of the electron transport chain, antimycin, evoked a marked increase in ROS production and completely inhibited thapsigargin and LPS-evoked responses. Conclusions. These findings indicate that the LPS-induced intracellular [Ca2+]i increase depends on the Ca2+ entry through CRAC channels, and close functional coupling between CRAC and ROS production in murine macrophages.
Collapse
Affiliation(s)
- Sheng-Wei Jin
- Department of Anesthesiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology,
Wuhan 430022, China
- Department of Anesthesiology, Second Affiliated Hospital, Wenzhou Medical College, Wenzhou 325027, China
- *Sheng-Wei Jin:
| | - Li Zhang
- Department of Pathophysiology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Qin-Quan Lian
- Department of Anesthesiology, Second Affiliated Hospital, Wenzhou Medical College, Wenzhou 325027, China
| | - Shang-Long Yao
- Department of Anesthesiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology,
Wuhan 430022, China
| | - Ping Wu
- Department of Pathophysiology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Xiao-Yan Zhou
- Department of Pathophysiology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Wei Xiong
- Department of Pathophysiology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Du-Yun Ye
- Department of Pathophysiology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| |
Collapse
|
8
|
Laporte R, Hui A, Laher I. Pharmacological modulation of sarcoplasmic reticulum function in smooth muscle. Pharmacol Rev 2004; 56:439-513. [PMID: 15602008 DOI: 10.1124/pr.56.4.1] [Citation(s) in RCA: 77] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
The sarco/endoplasmic reticulum (SR/ER) is the primary storage and release site of intracellular calcium (Ca2+) in many excitable cells. The SR is a tubular network, which in smooth muscle (SM) cells distributes close to cellular periphery (superficial SR) and in deeper aspects of the cell (deep SR). Recent attention has focused on the regulation of cell function by the superficial SR, which can act as a buffer and also as a regulator of membrane channels and transporters. Ca2+ is released from the SR via two types of ionic channels [ryanodine- and inositol 1,4,5-trisphosphate-gated], whereas accumulation from thecytoplasm occurs exclusively by an energy-dependent sarco-endoplasmic reticulum Ca2+-ATPase pump (SERCA). Within the SR, Ca2+ is bound to various storage proteins. Emerging evidence also suggests that the perinuclear portion of the SR may play an important role in nuclear transcription. In this review, we detail the pharmacology of agents that alter the functions of Ca2+ release channels and of SERCA. We describe their use and selectivity and indicate the concentrations used in investigating various SM preparations. Important aspects of cell regulation and excitation-contractile activity coupling in SM have been uncovered through the use of such activators and inhibitors of processes that determine SR function. Likewise, they were instrumental in the recent finding of an interaction of the SR with other cellular organelles such as mitochondria. Thus, an appreciation of the pharmacology and selectivity of agents that interfere with SR function in SM has greatly assisted in unveiling the multifaceted nature of the SR.
Collapse
Affiliation(s)
- Régent Laporte
- Ferring Research Institute, Inc., Ferring Pharmaceuticals, San Diego, California, USA
| | | | | |
Collapse
|