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Yeoh WJ, Krebs P. SHIP1 and its role for innate immune regulation-Novel targets for immunotherapy. Eur J Immunol 2023; 53:e2350446. [PMID: 37742135 DOI: 10.1002/eji.202350446] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Revised: 08/03/2023] [Accepted: 09/21/2023] [Indexed: 09/25/2023]
Abstract
Phosphoinositide-3-kinase/AKT (PI3K/AKT) signaling plays key roles in the regulation of cellular activity in both health and disease. In immune cells, this PI3K/AKT pathway is critically regulated by the phosphoinositide phosphatase SHIP1, which has been reported to modulate the function of most immune subsets. In this review, we summarize our current knowledge of SHIP1 with a focus on innate immune cells, where we reflect on the most pertinent aspects described in the current literature. We also present several small-molecule agonists and antagonists of SHIP1 developed over the last two decades, which have led to improved outcomes in several preclinical models of disease. We outline these promising findings and put them in relation to human diseases with unmet medical needs, where we discuss the most attractive targets for immune therapies based on SHIP1 modulation.
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Affiliation(s)
- Wen Jie Yeoh
- Institute of Tissue Medicine and Pathology, University of Bern, Bern, Switzerland
- Graduate School for Cellular and Biomedical Sciences, University of Bern, Bern, Switzerland
| | - Philippe Krebs
- Institute of Tissue Medicine and Pathology, University of Bern, Bern, Switzerland
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2
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Qin S, Li J, Zhou C, Privratsky B, Schettler J, Deng X, Xia Z, Zeng Y, Wu H, Wu M. SHIP-1 Regulates Phagocytosis and M2 Polarization Through the PI3K/Akt-STAT5-Trib1 Circuit in Pseudomonas aeruginosa Infection. Front Immunol 2020; 11:307. [PMID: 32256487 PMCID: PMC7093384 DOI: 10.3389/fimmu.2020.00307] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2019] [Accepted: 02/06/2020] [Indexed: 02/05/2023] Open
Abstract
SHIP-1 is an inositol phosphatase that hydrolyzes phosphatidylinositol 3-kinase (PI3K) products and negatively regulates protein kinase B (Akt) activity, thereby modulating a variety of cellular processes in mammals. However, the role of SHIP-1 in bacterial-induced sepsis is largely unknown. Here, we show that SHIP-1 regulates inflammatory responses during Gram-negative bacterium Pseudomonas aeruginosa infection. We found that infected-SHIP-1-/- mice exhibited decreased survival rates, increased inflammatory responses, and susceptibility owing to elevated expression of PI3K than wild-type (WT) mice. Inhibiting SHIP-1 via siRNA silencing resulted in lipid raft aggregates, aggravated oxidative damage, and bacterial burden in macrophages after PAO1 infection. Mechanistically, SHIP-1 deficiency augmented phosphorylation of PI3K and nuclear transcription of signal transducer and activator of transcription 5 (STAT5) to induce the expression of Trib1, which is critical for differentiation of M2 but not M1 macrophages. These findings reveal a previously unrecognized role of SHIP-1 in inflammatory responses and macrophage homeostasis during P. aeruginosa infection through a PI3K/Akt-STAT5-Trib1 axis.
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Affiliation(s)
- Shugang Qin
- Department of Biomedical Sciences, School of Medicine and Health Sciences, University of North Dakota, Grand Forks, ND, United States
- State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, China
| | - Jiaxin Li
- Department of Biomedical Sciences, School of Medicine and Health Sciences, University of North Dakota, Grand Forks, ND, United States
- Department of Liver Surgery, West China Hospital, Sichuan University, Chengdu, China
| | - Chuanmin Zhou
- Department of Biomedical Sciences, School of Medicine and Health Sciences, University of North Dakota, Grand Forks, ND, United States
| | - Breanna Privratsky
- Department of Biomedical Sciences, School of Medicine and Health Sciences, University of North Dakota, Grand Forks, ND, United States
| | - Jacob Schettler
- Department of Biomedical Sciences, School of Medicine and Health Sciences, University of North Dakota, Grand Forks, ND, United States
| | - Xin Deng
- Department of Pediatrics and Department of Pulmonary & Critical Care Medicine, Ruijin Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Zhenwei Xia
- Department of Pediatrics and Department of Pulmonary & Critical Care Medicine, Ruijin Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yong Zeng
- State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, China
| | - Hong Wu
- State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, China
| | - Min Wu
- Department of Biomedical Sciences, School of Medicine and Health Sciences, University of North Dakota, Grand Forks, ND, United States
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Saz-Leal P, Del Fresno C, Brandi P, Martínez-Cano S, Dungan OM, Chisholm JD, Kerr WG, Sancho D. Targeting SHIP-1 in Myeloid Cells Enhances Trained Immunity and Boosts Response to Infection. Cell Rep 2019; 25:1118-1126. [PMID: 30380404 PMCID: PMC6226423 DOI: 10.1016/j.celrep.2018.09.092] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2018] [Revised: 08/14/2018] [Accepted: 09/27/2018] [Indexed: 12/18/2022] Open
Abstract
β-Glucan-induced trained immunity in myeloid cells leads to long-term protection against secondary infections. Although previous studies have characterized this phenomenon, strategies to boost trained immunity remain undefined. We found that β-glucan-trained macrophages from mice with a myeloid-specific deletion of the phosphatase SHIP-1 (LysMΔSHIP-1) showed enhanced proinflammatory cytokine production in response to lipopolysaccharide. Following β-glucan training, SHIP-1-deficient macrophages exhibited increased phosphorylation of Akt and mTOR targets, correlating with augmented glycolytic metabolism. Enhanced training in the absence of SHIP-1 relied on histone methylation and acetylation. Trained LysMΔSHIP-1 mice produced increased amounts of proinflammatory cytokines upon rechallenge in vivo and were better protected against Candida albicans infection compared with control littermates. Pharmacological inhibition of SHIP-1 enhanced trained immunity against Candida infection in mouse macrophages and human peripheral blood mononuclear cells. Our data establish proof of concept for improvement of trained immunity and a strategy to achieve it by targeting SHIP-1.
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Affiliation(s)
- Paula Saz-Leal
- Immunobiology Lab, Centro Nacional de Investigaciones Cardiovasculares (CNIC), Melchor Fernández Almagro 3, Madrid, 28029, Spain
| | - Carlos Del Fresno
- Immunobiology Lab, Centro Nacional de Investigaciones Cardiovasculares (CNIC), Melchor Fernández Almagro 3, Madrid, 28029, Spain
| | - Paola Brandi
- Immunobiology Lab, Centro Nacional de Investigaciones Cardiovasculares (CNIC), Melchor Fernández Almagro 3, Madrid, 28029, Spain
| | - Sarai Martínez-Cano
- Immunobiology Lab, Centro Nacional de Investigaciones Cardiovasculares (CNIC), Melchor Fernández Almagro 3, Madrid, 28029, Spain
| | - Otto M Dungan
- Department of Chemistry, Syracuse University, Syracuse, NY 13210, USA
| | - John D Chisholm
- Department of Chemistry, Syracuse University, Syracuse, NY 13210, USA
| | - William G Kerr
- Department of Chemistry, Syracuse University, Syracuse, NY 13210, USA; Department of Microbiology and Immunology, State University of New York (SUNY) Upstate Medical University, Syracuse, NY 13210, USA; Pediatrics Department, SUNY Upstate Medical University, Syracuse, NY, USA; Centre d'Immunologie de Marseille-Luminy, Marseille, France
| | - David Sancho
- Immunobiology Lab, Centro Nacional de Investigaciones Cardiovasculares (CNIC), Melchor Fernández Almagro 3, Madrid, 28029, Spain.
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4
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Hibbs ML, Raftery AL, Tsantikos E. Regulation of hematopoietic cell signaling by SHIP-1 inositol phosphatase: growth factors and beyond. Growth Factors 2018; 36:213-231. [PMID: 30764683 DOI: 10.1080/08977194.2019.1569649] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
SHIP-1 is a hematopoietic-specific inositol phosphatase activated downstream of a multitude of receptors including those for growth factors, cytokines, antigen, immunoglobulin and toll-like receptor agonists where it exerts inhibitory control. While it is constitutively expressed in all immune cells, SHIP-1 expression is negatively regulated by the inflammatory and oncogenic micro-RNA miR-155. Knockout mouse studies have shown the importance of SHIP-1 in various immune cell subsets and have revealed a range of immune-mediated pathologies that are engendered due to loss of SHIP-1's regulatory activity, impelling investigations into the role of SHIP-1 in human disease. In this review, we provide an overview of the literature relating to the role of SHIP-1 in hematopoietic cell signaling and function, we summarize recent reports that highlight the dysregulation of the SHIP-1 pathway in cancers, autoimmune disorders and inflammatory diseases, and lastly we discuss the importance of SHIP-1 in restraining myeloid growth factor signaling.
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Affiliation(s)
- Margaret L Hibbs
- a Department of Immunology and Pathology , Alfred Medical Research and Education Precinct Monash University , Melbourne , Victoria , Australia
| | - April L Raftery
- a Department of Immunology and Pathology , Alfred Medical Research and Education Precinct Monash University , Melbourne , Victoria , Australia
| | - Evelyn Tsantikos
- a Department of Immunology and Pathology , Alfred Medical Research and Education Precinct Monash University , Melbourne , Victoria , Australia
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5
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Gold MJ, Antignano F, Hughes MR, Zaph C, McNagny KM. Dendritic-cell expression ofShip1regulates Th2 immunity to helminth infection in mice. Eur J Immunol 2015; 46:122-30. [DOI: 10.1002/eji.201545628] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2015] [Revised: 09/15/2015] [Accepted: 10/15/2015] [Indexed: 11/07/2022]
Affiliation(s)
- Matthew J. Gold
- Biomedical Research Centre; University of British Columbia; Vancouver Canada
| | - Frann Antignano
- Biomedical Research Centre; University of British Columbia; Vancouver Canada
| | - Michael R. Hughes
- Biomedical Research Centre; University of British Columbia; Vancouver Canada
| | - Colby Zaph
- Biomedical Research Centre; University of British Columbia; Vancouver Canada
- Infection and Immunity Program; Monash Biomedicine Discovery Institute
- Department of Biochemistry and Molecular Biology; Monash University; Clayton Australia
| | - Kelly M. McNagny
- Biomedical Research Centre; University of British Columbia; Vancouver Canada
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Gold MJ, Hughes MR, Antignano F, Hirota JA, Zaph C, McNagny KM. Lineage-specific regulation of allergic airway inflammation by the lipid phosphatase Src homology 2 domain-containing inositol 5-phosphatase (SHIP-1). J Allergy Clin Immunol 2015; 136:725-736.e2. [PMID: 25746967 DOI: 10.1016/j.jaci.2015.01.019] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2014] [Revised: 12/17/2014] [Accepted: 01/21/2015] [Indexed: 12/24/2022]
Abstract
BACKGROUND Inpp5d (Src homology 2 domain-containing inositol-5-phosphatase [Ship1])-deficient mice experience spontaneous airway inflammation and have enhanced sensitivity to allergen-induced airway inflammation. OBJECTIVE We hypothesized that lineage-specific deletion of Ship1 expression in cells known to be crucial for adaptive TH2 responses would uncover distinct roles that could either positively or negatively regulate susceptibility to allergic airway inflammation (AAI). METHODS Ship1 expression was deleted in B cells, T cells, or dendritic cells (DCs), and the resulting Ship1(ΔB cell), Ship1(ΔT cell), Ship1(ΔDC), or Ship1(F/F) (wild-type) control mice were evaluated in a model of house dust mite (HDM)-induced AAI. RESULTS Unlike germline panhematopoietic Ship1 deletion, deletion of Ship1 selectively in either the B-cell, T-cell, or DC lineages did not result in spontaneous airway inflammation. Strikingly, although loss of Ship1 in the B-cell lineage did not affect HDM-induced AAI, loss of Ship1 in either of the T-cell or DC lineages protected mice from AAI by skewing the typical TH2 immune response toward a TH1 response. CONCLUSIONS Although panhematopoietic deletion of Ship1 leads to spontaneous lung inflammation, selective deletion of Ship1 in T cells or DCs impairs the formation of an adaptive TH2 response and protects animals from HDM-induced AAI.
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Affiliation(s)
- Matthew J Gold
- The Biomedical Research Centre, University of British Columbia, Vancouver, British Columbia, Canada
| | - Michael R Hughes
- The Biomedical Research Centre, University of British Columbia, Vancouver, British Columbia, Canada
| | - Frann Antignano
- The Biomedical Research Centre, University of British Columbia, Vancouver, British Columbia, Canada
| | - Jeremy A Hirota
- UBC James Hogg Research Centre, St Paul's Hospital, Vancouver, British Columbia, Canada
| | - Colby Zaph
- The Biomedical Research Centre, University of British Columbia, Vancouver, British Columbia, Canada; Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, British Columbia, Canada; Department of Biochemistry and Molecular Biology, Monash University, Clayton, Australia
| | - Kelly M McNagny
- The Biomedical Research Centre, University of British Columbia, Vancouver, British Columbia, Canada.
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Jones PH, Okeoma CM. Phosphatidylinositol 3-kinase is involved in Toll-like receptor 4-mediated BST-2/tetherin regulation. Cell Signal 2013; 25:2752-61. [PMID: 24036213 DOI: 10.1016/j.cellsig.2013.08.042] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2013] [Accepted: 08/30/2013] [Indexed: 10/26/2022]
Abstract
BST-2 is a virus restriction factor whose expression is principally induced by IFNα through the type I IFN receptor. However, expression of BST-2 is modulated by mitogens, notably the TLR4 agonist - LPS, via mechanisms that are poorly understood. In this study, the role of TLR4 pathway on BST-2 expression was examined. We demonstrate that the TLR4/PI3K signaling pathway regulates both constitutive and LPS-induced BST-2 expression. LPS stimulation induces BST-2 expression in a manner dependent on TLR4/TRIF/IRF3 pathway. Genetic deletion or pharmacological inhibition of signaling through TLR4, as well as, the deletion of the TRIF and IRF3 genes blunts BST-2 induction by LPS. However, MYD88-/- cells have enhanced BST-2 levels and respond to LPS-mediated induction of BST-2. High level of BST-2 in MYD88 null cells is dependent on IFNβ since antibody-mediated neutralization of IFNβ synthesis results in reduced BST-2 levels in these cells. Similar to the effect of MYD88, inhibition of PI3K activity elevates basal BST-2 level and augments LPS-induced BST-2 expression. Importantly, BST-2 regulation via TLR4 and PI3K is transcriptionally controlled. We discovered that actinomycin D-mediated blocking of gene transcription and inhibition of protein synthesis with cycloheximide result in impairment of BST-2 mRNA expression. Taken together, our results demonstrate that activation of TLR4 results in TRIF/IRF3-mediated positive regulation of BST-2 or MYD88/PI3K-directed negative regulation of BST-2. Thus, our findings enlist BST-2 as one of the genes regulated by PI3K downstream of TLR4 and identify the TLR4/PI3K signaling as a novel pathway that controls BST-2 expression.
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Affiliation(s)
- Philip H Jones
- Department of Microbiology, University of Iowa, Carver College of Medicine, Iowa City, IA, United States
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Foster JG, Blunt MD, Carter E, Ward SG. Inhibition of PI3K signaling spurs new therapeutic opportunities in inflammatory/autoimmune diseases and hematological malignancies. Pharmacol Rev 2013; 64:1027-54. [PMID: 23023033 DOI: 10.1124/pr.110.004051] [Citation(s) in RCA: 88] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
The phosphoinositide 3-kinase/mammalian target of rapamycin/protein kinase B (PI3K/mTOR/Akt) signaling pathway is central to a plethora of cellular mechanisms in a wide variety of cells including leukocytes. Perturbation of this signaling cascade is implicated in inflammatory and autoimmune disorders as well as hematological malignancies. Proteins within the PI3K/mTOR/Akt pathway therefore represent attractive targets for therapeutic intervention. There has been a remarkable evolution of PI3K inhibitors in the past 20 years from the early chemical tool compounds to drugs that are showing promise as anticancer agents in clinical trials. The use of animal models and pharmacological tools has expanded our knowledge about the contribution of individual class I PI3K isoforms to immune cell function. In addition, class II and III PI3K isoforms are emerging as nonredundant regulators of immune cell signaling revealing potentially novel targets for disease treatment. Further complexity is added to the PI3K/mTOR/Akt pathway by a number of novel signaling inputs and feedback mechanisms. These can present either caveats or opportunities for novel drug targets. Here, we consider recent advances in 1) our understanding of the contribution of individual PI3K isoforms to immune cell function and their relevance to inflammatory/autoimmune diseases as well as lymphoma and 2) development of small molecules with which to inhibit the PI3K pathway. We also consider whether manipulating other proximal elements of the PI3K signaling cascade (such as class II and III PI3Ks or lipid phosphatases) are likely to be successful in fighting off different immune diseases.
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Affiliation(s)
- John G Foster
- Inflammatory Cell Biology Laboratory, Department of Pharmacy and Pharmacology, University of Bath, Claverton Down, Bath, UK.
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Troutman TD, Bazan JF, Pasare C. Toll-like receptors, signaling adapters and regulation of the pro-inflammatory response by PI3K. Cell Cycle 2012; 11:3559-67. [PMID: 22895011 PMCID: PMC3478307 DOI: 10.4161/cc.21572] [Citation(s) in RCA: 143] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
TLRs are a family of pattern recognition receptors that recognize conserved molecular structures/products from a wide variety of microbes. Following recognition of ligands, TLRs recruit signaling adapters to initiate a pro-inflammatory signaling cascade culminating in the activation of several transcription factor families. Additionally, TLR signals lead to activation of PI3K, affecting many aspects of the cellular response, including cell survival, proliferation and regulation of the pro-inflammatory response. The recent discovery of BCAP as a TLR signaling adaptor, crucial for linking TLRs to PI3K activation, allows new questions of the importance of PI3K activation downstream of TLRs. Here, we summarize the current understanding of signaling pathways activated by TLRs and provide our perspective on TLR mediated activation of PI3K and its impact on regulating cellular processes.
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Affiliation(s)
- Ty Dale Troutman
- Department of Immunology; University of Texas Southwestern Medical Center; Dallas, TX USA
| | | | - Chandrashekhar Pasare
- Department of Immunology; University of Texas Southwestern Medical Center; Dallas, TX USA
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Krebs DL, Chehal MK, Sio A, Huntington ND, Da ML, Ziltener P, Inglese M, Kountouri N, Priatel JJ, Jones J, Tarlinton DM, Anderson GP, Hibbs ML, Harder KW. Lyn-Dependent Signaling Regulates the Innate Immune Response by Controlling Dendritic Cell Activation of NK Cells. THE JOURNAL OF IMMUNOLOGY 2012; 188:5094-105. [DOI: 10.4049/jimmunol.1103395] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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B-cell adaptor for PI3K (BCAP) negatively regulates Toll-like receptor signaling through activation of PI3K. Proc Natl Acad Sci U S A 2011; 109:267-72. [PMID: 22187458 DOI: 10.1073/pnas.1111957108] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Toll-like receptors (TLRs) recognize pathogens and their components, thereby initiating immune responses to infectious organisms. TLR ligation leads to the activation of NF-κB and MAPKs through well-defined pathways, but it has remained unclear how TLR signaling activates PI3K, which provides an inhibitory pathway limiting TLR responses. Here, we show that the signaling adapter B-cell adaptor for PI3K (BCAP) links TLR signaling to PI3K activation. BCAP-deficient macrophages and mice are hyperresponsive to TLR agonists and have reduced PI3K activation. The ability of BCAP to inhibit TLR responses requires its capacity to bind PI3K. BCAP is constitutively phosphorylated and associated with the p85 subunit of PI3K in macrophages. This tyrosine-phosphorylated BCAP is transiently enriched in the membrane fraction in response to LPS treatment, suggesting a model whereby TLR signaling causes the phosphorylation of the small amount of BCAP that is associated with membranes in the resting state or the translocation of phosphorylated BCAP from the cytoplasm to the membrane. This accumulation of tyrosine-phosphorylated BCAP at the membrane with its associated PI3K would then allow for the catalysis of Ptd Ins P2 to Ptd Ins P3 and downstream PI3K-dependent signals. Therefore, BCAP is an essential activator of the PI3K pathway downstream of TLR signaling, providing a brake to limit potentially pathogenic excessive TLR responses.
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Di Caro V, D'Anneo A, Phillips B, Engman C, Harnaha J, Trucco M, Giannoukakis N. Phosphatidylinositol-3-kinase activity during in vitro dendritic cell generation determines suppressive or stimulatory capacity. Immunol Res 2011; 50:130-52. [PMID: 21476100 DOI: 10.1007/s12026-011-8206-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Modulating PI3K at different stages of dendritic cells (DC) generation could be a novel means to balance the generation of immunosuppressive versus immunostimulatory DC. We show that PI3K inhibition during mouse DC generation in vitro results in cells that are potently immunosuppressive and characteristic of CD8alpha- CD11c+ CD11b+ DC. These DC exhibited low surface class I and class II MHC, CD40, and CD86 and did not produce TNF-alpha. In allogeneic MLR, these DC were suppressive. Although in these mixed cultures, there was no increase in the frequency of CD4+ CD25+ Foxp3+ cells, the Foxp3 content on a per cell basis was significantly increased. Sustained TLR9 signaling in the presence of PI3K inhibition during DC generation overrode the cells' suppressive phenotype.
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Affiliation(s)
- Valentina Di Caro
- Department of Pediatrics, Division of Immunogenetics, Children's Hospital of Pittsburgh, University of Pittsburgh School of Medicine, 4401 Penn Avenue, Pittsburgh, PA 15224, USA
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14
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Hamilton MJ, Ho VW, Kuroda E, Ruschmann J, Antignano F, Lam V, Krystal G. Role of SHIP in cancer. Exp Hematol 2010; 39:2-13. [PMID: 21056081 DOI: 10.1016/j.exphem.2010.11.002] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2010] [Revised: 09/30/2010] [Accepted: 11/02/2010] [Indexed: 12/19/2022]
Abstract
The SH2-containing inositol-5'-phosphatase, SHIP (or SHIP1), is a hematopoietic-restricted phosphatidylinositide phosphatase that translocates to the plasma membrane after extracellular stimulation and hydrolyzes the phosphatidylinositol-3-kinase-generated second messenger PI-3,4,5-P(3) to PI-3,4-P(2). As a result, SHIP dampens down PI-3,4,5-P(3)-mediated signaling and represses the proliferation, differentiation, survival, activation, and migration of hematopoietic cells. There are multiple lines of evidence suggesting that SHIP may act as a tumor suppressor during leukemogenesis and lymphomagenesis. Because of its ability to skew macrophage progenitors toward M1 macrophages and naïve T cells toward T helper 1 and T helper 17 cells, SHIP may play a critical role in activating the immune system to eradicate solid tumors. In this review, we will discuss the role of SHIP in hematopoietic cells and its therapeutic potential in terms of suppressing leukemias and lymphomas and manipulating the immune system to combat cancer.
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Affiliation(s)
- Melisa J Hamilton
- The Terry Fox Laboratory, BC Cancer Agency, Vancouver, British Columbia, Canada
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