51
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Homma T, Takeda Y, Sakahara S, Ishii N, Kobayashi S, Abe H, Asao H, Fujii J. Heterozygous SOD1 deficiency in mice with an NZW background causes male infertility and an aberrant immune phenotype. Free Radic Res 2019; 53:1060-1072. [DOI: 10.1080/10715762.2019.1677901] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Takujiro Homma
- Department of Biochemistry and Molecular Biology, Graduate School of Medical Science, Yamagata University, Yamagata, Japan
| | - Yuji Takeda
- Department of Immunology, Yamagata University Faculty of Medicine, Yamagata, Japan
| | - Satoshi Sakahara
- Biochemical Engineering, Graduate School of Science and Engineering, Yamagata University, Yamagata, Japan
| | - Naoki Ishii
- Department of Biochemistry and Molecular Biology, Graduate School of Medical Science, Yamagata University, Yamagata, Japan
| | - Sho Kobayashi
- Department of Biochemistry and Molecular Biology, Graduate School of Medical Science, Yamagata University, Yamagata, Japan
| | - Hiroyuki Abe
- Biochemical Engineering, Graduate School of Science and Engineering, Yamagata University, Yamagata, Japan
| | - Hironobu Asao
- Department of Immunology, Yamagata University Faculty of Medicine, Yamagata, Japan
| | - Junichi Fujii
- Department of Biochemistry and Molecular Biology, Graduate School of Medical Science, Yamagata University, Yamagata, Japan
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52
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Blisnick AA, Šimo L, Grillon C, Fasani F, Brûlé S, Le Bonniec B, Prina E, Marsot M, Relmy A, Blaise-Boisseau S, Richardson J, Bonnet SI. The Immunomodulatory Effect of IrSPI, a Tick Salivary Gland Serine Protease Inhibitor Involved in Ixodes ricinus Tick Feeding. Vaccines (Basel) 2019; 7:vaccines7040148. [PMID: 31614804 PMCID: PMC6963187 DOI: 10.3390/vaccines7040148] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2019] [Revised: 10/02/2019] [Accepted: 10/04/2019] [Indexed: 12/31/2022] Open
Abstract
Ticks are the most important vectors of pathogens affecting both domestic and wild animals worldwide. Hard tick feeding is a slow process—taking up to several days—and necessitates extended control over the host response. The success of the feeding process depends upon injection of tick saliva, which not only controls host hemostasis and wound healing, but also subverts the host immune response to avoid tick rejection that creates a favorable niche for the survival and propagation of diverse tick-borne pathogens. Here, we report on the molecular and biochemical features and functions of an Ixodes ricinus serine protease inhibitor (IrSPI). We characterize IrSPI as a Kunitz elastase inhibitor that is overexpressed in several tick organs—especially salivary glands—during blood-feeding. We also demonstrated that when IrSPI is injected into the host through saliva, it had no impact on tissue factor pathway-induced coagulation, fibrinolysis, endothelial cell angiogenesis or apoptosis, but the protein exhibits immunomodulatory activity. In particular, IrSPI represses proliferation of CD4+ T lymphocytes and proinflammatory cytokine secretion from both splenocytes and macrophages. Our study contributes valuable knowledge to tick-host interactions and provides insights that could be further exploited to design anti-tick vaccines targeting this immunomodulator implicated in I. ricinus feeding.
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Affiliation(s)
- Adrien A Blisnick
- UMR BIPAR, Animal Health Laboratory, INRA, ANSES, Ecole Nationale Vétérinaire d'Alfort, Université Paris-Est, 94701 Maisons-Alfort CEDEX, France.
| | - Ladislav Šimo
- UMR BIPAR, Animal Health Laboratory, INRA, ANSES, Ecole Nationale Vétérinaire d'Alfort, Université Paris-Est, 94701 Maisons-Alfort CEDEX, France.
| | - Catherine Grillon
- Centre de Biophysique Moléculaire-UPR 4301 CNRS, 45000 Orléans, France.
| | - Fabienne Fasani
- Centre de Biophysique Moléculaire-UPR 4301 CNRS, 45000 Orléans, France.
| | - Sébastien Brûlé
- Plateforme de Biophysique moléculaire, Institut Pasteur, UMR 3528 CNRS, 75015 Paris, France.
| | - Bernard Le Bonniec
- INSERM UMR-S1140, Faculté de Pharmacie Université Paris Descartes, Sorbonne Paris Cité, 75270 Paris CEDEX 06, France.
| | - Eric Prina
- Unité de Parasitologie moléculaire et Signalisation-INSERM U1201, Institut Pasteur, 75015 Paris, France.
| | - Maud Marsot
- Unité EPI, Animal Health Laboratory, INRA, ANSES, Ecole Nationale Vétérinaire d'Alfort, Université Paris-Est, 94701 Maisons-Alfort CEDEX, France.
| | - Anthony Relmy
- UMR Virologie 1161, Animal Health Laboratory, INRA, ANSES, Ecole Nationale Vétérinaire d'Alfort, Université Paris-Est, 94701 Maisons-Alfort CEDEX, France.
| | - Sandra Blaise-Boisseau
- UMR Virologie 1161, Animal Health Laboratory, INRA, ANSES, Ecole Nationale Vétérinaire d'Alfort, Université Paris-Est, 94701 Maisons-Alfort CEDEX, France.
| | - Jennifer Richardson
- UMR Virologie 1161, Animal Health Laboratory, INRA, ANSES, Ecole Nationale Vétérinaire d'Alfort, Université Paris-Est, 94701 Maisons-Alfort CEDEX, France.
| | - Sarah I Bonnet
- UMR BIPAR, Animal Health Laboratory, INRA, ANSES, Ecole Nationale Vétérinaire d'Alfort, Université Paris-Est, 94701 Maisons-Alfort CEDEX, France.
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53
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Shao Q, Gao H. Progress in interleukin-2 therapy for rheumatic immune diseases by regulating the immune balance of T cells. Scand J Immunol 2019; 90:e12822. [PMID: 31494958 DOI: 10.1111/sji.12822] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Revised: 08/26/2019] [Accepted: 08/29/2019] [Indexed: 12/12/2022]
Abstract
Breaking the balance between effector T cells, including Th17 (T helper cell 17) cells, and regulatory T cells (Tregs) is a key link in the pathogenesis of rheumatic immune diseases, which lead to a new concept of regulating immune balance in the treatment of rheumatic immune diseases. Interleukin (IL)-2 can effectively regulate the differentiation, development and functional activity of regulatory T cells, thus restoring the immune balance between regulatory T cells and effector T cells. Therefore, low-dose IL-2 has been used in the treatment of rheumatic immune diseases, and it has become a promising new choice to achieve therapeutic purpose by regulating the immune balance of T cell. Here, we discuss the role of T cells immune imbalance in the pathogenesis of rheumatic immune diseases and the mechanism of IL-2 in the treatment of rheumatic immune diseases by regulating T cells immune balance and summarize the relevant clinical trials.
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Affiliation(s)
- Qin Shao
- Department of Rheumatology, Chongqing Hospital of Traditional Chinese Medicine, Chongqing, China
| | - Hongyan Gao
- Department of Rheumatology, Chongqing Hospital of Traditional Chinese Medicine, Chongqing, China
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54
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Mohammadi MR, Corbo C, Molinaro R, Lakey JRT. Biohybrid Nanoparticles to Negotiate with Biological Barriers. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2019; 15:e1902333. [PMID: 31250985 DOI: 10.1002/smll.201902333] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Revised: 05/30/2019] [Indexed: 06/09/2023]
Abstract
Incapability of effective cross-talk with biological environments has partly impaired the in vivo functionality of nanoparticles (NPs). Homing, biodistribution, and function of NPs could be engineered through regulating their interactions with in vivo niches. Inspired by communications in biological systems, endowing a "biological identity" to synthetic NPs is one approach to control their biodistribution, and immunonegotiation profiles. This synthetic-biological combination is referred to as biohybrid NPs, which comprise both i) engineerable, readily producible, and trackable synthetic NPs as well as ii) biological moieties with the capability to cross-talk with immunological barriers. Here, the latest understanding on the in vivo interactions of NPs, biological barriers they face, and emerging methods for quantitative measurements of NPs' biodistribution are reviewed. Some key biomolecules that have emerged as negotiators with the immune system in the context of cancer and autoimmunity, and their inspirations on biohybrid NPs are introduced. Critical design considerations for efficient cross-talk between NPs and innate and adaptive immunity followed by hybridization methods are also discussed. Finally, clinical translation challenges and future perspectives regarding biohybrid NPs are discussed.
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Affiliation(s)
- M Rezaa Mohammadi
- Department of Chemical Engineering and Materials Science, University of California, Irvine, Sue and Bill Gross Stem Cell Research Center, Irvine, CA, 92697, USA
- Department of Surgery and Biomedical Engineering, University of California, Irvine, CA, 92697, USA
| | - Claudia Corbo
- School of Medicine and Surgery, University of Milano-Bicocca, Milan, MI, 20126, Italy
| | - Roberto Molinaro
- Department of Biomolecular Sciences, University of Urbino Carlo Bo, Urbino, PU, 61029, Italy
- Department of Cardiovascular Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, 02115, USA
| | - Jonathan R T Lakey
- Department of Surgery and Biomedical Engineering, University of California, Irvine, CA, 92697, USA
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55
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Xie MM, Liu H, Corn C, Koh BH, Kaplan MH, Turner MJ, Dent AL. Roles of T Follicular Helper Cells and T Follicular Regulatory Cells in Autoantibody Production in IL-2-Deficient Mice. Immunohorizons 2019; 3:306-316. [PMID: 31356160 DOI: 10.4049/immunohorizons.1900034] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Accepted: 06/27/2019] [Indexed: 12/17/2022] Open
Abstract
Autoantibodies can result from excessive T follicular helper (Tfh) cell activity, whereas T follicular regulatory (Tfr) cells negatively regulate autoantibody production. IL-2 knockout (KO) mice on the BALB/c background have elevated Tfh responses, produce autoantibodies, and develop lethal autoimmunity. We analyzed Tfh and Tfr cells in IL-2 KO mice on the C57BL/6 (B6) genetic background. In B6 IL-2 KO mice, the spontaneous formation of Tfh cells and germinal center B cells was greatly enhanced, along with production of anti-DNA autoantibodies. IL-2 has been reported to repress Tfr cell differentiation; however, Tfr cells were not increased over wild-type levels in the B6 IL-2 KO mice. To assess Tfh and Tfr cell regulation of autoantibody production in IL-2 KO mice, we generated IL-2 KO mice with a T cell-specific deletion of the master Tfh cell transcription factor Bcl6. In IL-2 KO Bcl6 conditional KO (2KO-Bcl6TC) mice, Tfh cells, Tfr cells, and germinal center B cells were ablated. In contrast to expectations, autoantibody IgG titers in 2KO-Bcl6TC mice were significantly elevated over autoantibody IgG titers in IL-2 KO mice. Specific deletion of Tfr cells with Foxp3-cre Bcl6-flox alleles in IL-2 KO mice led to early lethality, before high levels of autoantibodies could develop. We found IL-2+/+ Tfr cell-deficient mice produce significant levels of autoantibodies. Our overall findings provide evidence that Tfh cells are dispensable for high-level production of autoantibodies and also reveal a complex interplay between Tfh and Tfr cells in autoantibody production and autoimmune disease.
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Affiliation(s)
- Markus M Xie
- Department of Microbiology and Immunology, Indiana University School of Medicine, Indianapolis, IN 46202
| | - Hong Liu
- Department of Microbiology and Immunology, Indiana University School of Medicine, Indianapolis, IN 46202
| | - Caleb Corn
- Department of Microbiology and Immunology, Indiana University School of Medicine, Indianapolis, IN 46202
| | - Byung-Hee Koh
- Department of Microbiology and Immunology, Indiana University School of Medicine, Indianapolis, IN 46202.,Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN 46202; and
| | - Mark H Kaplan
- Department of Microbiology and Immunology, Indiana University School of Medicine, Indianapolis, IN 46202.,Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN 46202; and
| | - Matthew J Turner
- Department of Microbiology and Immunology, Indiana University School of Medicine, Indianapolis, IN 46202.,Department of Dermatology, Indiana University School of Medicine, Indianapolis, IN 46202
| | - Alexander L Dent
- Department of Microbiology and Immunology, Indiana University School of Medicine, Indianapolis, IN 46202;
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56
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Abbas AK, Trotta E, R Simeonov D, Marson A, Bluestone JA. Revisiting IL-2: Biology and therapeutic prospects. Sci Immunol 2019; 3:3/25/eaat1482. [PMID: 29980618 DOI: 10.1126/sciimmunol.aat1482] [Citation(s) in RCA: 332] [Impact Index Per Article: 66.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2018] [Accepted: 06/07/2018] [Indexed: 12/13/2022]
Abstract
Interleukin-2 (IL-2), the first cytokine that was molecularly cloned, was shown to be a T cell growth factor essential for the proliferation of T cells and the generation of effector and memory cells. On the basis of this activity, the earliest therapeutic application of IL-2 was to boost immune responses in cancer patients. Therefore, it was a surprise that genetic deletion of the cytokine or its receptor led not only to the expected immune deficiency but also to systemic autoimmunity and lymphoproliferation. Subsequent studies established that IL-2 is essential for the maintenance of Foxp3+ regulatory T cells (Treg cells), and in its absence, there is a profound deficiency of Treg cells and resulting autoimmunity. We now know that IL-2 promotes the generation, survival, and functional activity of Treg cells and thus has dual and opposing functions: maintaining Treg cells to control immune responses and stimulating conventional T cells to promote immune responses. It is well documented that certain IL-2 conformations result in selective targeting of Treg cells by increasing reliance on CD25 binding while compromising CD122 binding. Recent therapeutic strategies have emerged to use IL-2, monoclonal antibodies to IL-2, or IL-2 variants to boost Treg cell numbers and function to treat autoimmune diseases while dealing with the continuing challenges to minimize the generation of effector and memory cells, natural killer cells, and other innate lymphoid populations.
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Affiliation(s)
- Abul K Abbas
- Department of Pathology, University of California, San Francisco, San Francisco, CA, USA.
| | - Eleonora Trotta
- Diabetes Center, University of California, San Francisco, San Francisco, CA, USA
| | - Dimitre R Simeonov
- Diabetes Center, University of California, San Francisco, San Francisco, CA, USA.,Department of Microbiology and Immunology, University of California, San Francisco, San Francisco, CA 94143, USA
| | - Alexander Marson
- Diabetes Center, University of California, San Francisco, San Francisco, CA, USA.,Department of Microbiology and Immunology, University of California, San Francisco, San Francisco, CA 94143, USA
| | - Jeffrey A Bluestone
- Diabetes Center, University of California, San Francisco, San Francisco, CA, USA.
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57
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Chen Q, Guo X, Deng N, Liu L, Chen S, Wang A, Li R, Huang Y, Ding X, Yu H, Hu S, Nie H. α-Galactosylceramide treatment before allergen sensitization promotes iNKT cell-mediated induction of Treg cells, preventing Th2 cell responses in murine asthma. J Biol Chem 2019; 294:5438-5455. [PMID: 30745361 DOI: 10.1074/jbc.ra118.005418] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2018] [Revised: 01/18/2019] [Indexed: 12/31/2022] Open
Abstract
Asthma is a common inflammatory pulmonary disorder involving a diverse array of immune cells such as proinflammatory T helper 2 (Th2) cells. We recently reported that intraperitoneal injection of α-galactosylceramide (α-GalCer) can stimulate the lung invariant natural killer T (iNKT) cells and does not lead to airway inflammation in WT mice. Other studies indicate that iNKT cells play an important role in inducing regulatory T cells (Treg cells) and peripheral tolerance. Using iNKT cell- knockout mice, functional inactivation of Treg cells, and co-culture experiments in murine asthma models, we investigated the immunoregulatory effects of α-GalCer treatment before allergen sensitization on Th2 cell responses. We also studied whether α-GalCer's effects require lung Treg cells induced by activated iNKT cells. Our results disclosed that intraperitoneal administration of α-GalCer before allergen sensitization could promote the expansion and suppressive activity of lung CD4+FoxP3+ Treg cells. These effects were accompanied by down-regulated Th2 cell responses and decreased immunogenic maturation of lung dendritic cells in WT mice. However, these changes were absent in CD1d-/- mice immunized and challenged with ovalbumin or house dust mites, indicating that the effects of α-GalCer on Treg cells mainly require iNKT cells. Moreover, functional inactivation of Treg cells could reverse the inhibitory ability of this α-GalCer therapy on Th2 cell responses in a murine asthma model. Our findings indicate that intraperitoneal administration of α-GalCer before the development of asthma symptoms induces the generation of lung Treg cells via iNKT cells and may provide a potential therapeutic strategy to prevent allergic asthma.
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Affiliation(s)
- Qianhui Chen
- From the Department of Respiratory and Critical Medicine, Renmin Hospital of Wuhan University, Wuhan 430060 and
| | - Xuxue Guo
- From the Department of Respiratory and Critical Medicine, Renmin Hospital of Wuhan University, Wuhan 430060 and
| | - Nishan Deng
- From the Department of Respiratory and Critical Medicine, Renmin Hospital of Wuhan University, Wuhan 430060 and
| | - Linlin Liu
- From the Department of Respiratory and Critical Medicine, Renmin Hospital of Wuhan University, Wuhan 430060 and
| | - Shuo Chen
- From the Department of Respiratory and Critical Medicine, Renmin Hospital of Wuhan University, Wuhan 430060 and
| | - Ailing Wang
- the Nursing Department, Wuhan University School of Health Sciences, Wuhan 430060, China
| | - Ruiyun Li
- From the Department of Respiratory and Critical Medicine, Renmin Hospital of Wuhan University, Wuhan 430060 and
| | - Yi Huang
- From the Department of Respiratory and Critical Medicine, Renmin Hospital of Wuhan University, Wuhan 430060 and
| | - Xuhong Ding
- From the Department of Respiratory and Critical Medicine, Renmin Hospital of Wuhan University, Wuhan 430060 and
| | - Hongying Yu
- From the Department of Respiratory and Critical Medicine, Renmin Hospital of Wuhan University, Wuhan 430060 and
| | - Suping Hu
- From the Department of Respiratory and Critical Medicine, Renmin Hospital of Wuhan University, Wuhan 430060 and
| | - Hanxiang Nie
- From the Department of Respiratory and Critical Medicine, Renmin Hospital of Wuhan University, Wuhan 430060 and
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58
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Tahvildari M, Inomata T, Amouzegar A, Dana R. Regulatory T cell modulation of cytokine and cellular networks in corneal graft rejection. CURRENT OPHTHALMOLOGY REPORTS 2018; 6:266-274. [PMID: 31807370 PMCID: PMC6894425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
PURPOSE OF REVIEW Corneal allografts placed in vascularized or inflamed host beds are at increased risk of graft rejection due to the preponderance of activated immune cells in the host bed. Regulatory T cells (Tregs) are master regulators of the adaptive immune response and play a key role in the induction of immune tolerance. The aim of this review is to discuss mechanisms through which Tregs mediate tolerance in corneal transplantation and the novel therapeutic approaches that target Tregs to promote transplant survival. RECENT FINDINGS The inflammatory environment of high-risk allografts not only promotes activation of effector T cells and their infiltration to graft site, but also impairs Treg immunomodulatory function. Recent studies have shown that expansion of Tregs and enhancing their modulatory function significantly improve graft survival. SUMMARY As our understanding of the cellular and molecular pathways in corneal transplantation has deepened, novel therapeutic strategies have been developed to improve allograft survival. In this review, we discuss therapeutic approaches that focus on Tregs to promote corneal allograft survival.
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Affiliation(s)
- Maryam Tahvildari
- Schepens Eye Research Institute, Massachusetts Eye and Ear Infirmary, Department of Ophthalmology, Harvard Medical School, Boston, MA
- Kresge Eye Institute, Department of ophthalmology, Wayne State University, Detroit, MI
| | - Takenori Inomata
- Schepens Eye Research Institute, Massachusetts Eye and Ear Infirmary, Department of Ophthalmology, Harvard Medical School, Boston, MA
- Juntendo University Faculty of Medicine, Department of Ophthalmology, Tokyo, Japan
- Juntendo University Faculty of Medicine, Department of Strategic Operative Room, Management and Improvement, Tokyo, Japan
| | - Afsaneh Amouzegar
- Schepens Eye Research Institute, Massachusetts Eye and Ear Infirmary, Department of Ophthalmology, Harvard Medical School, Boston, MA
| | - Reza Dana
- Schepens Eye Research Institute, Massachusetts Eye and Ear Infirmary, Department of Ophthalmology, Harvard Medical School, Boston, MA
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59
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Chen Q, Guo X, Deng N, Liu L, Chen S, Wang A, Li R, Huang Y, Ding X, Yu H, Hu S, Nie H. α-galactosylceramide generates lung regulatory T cells through the activated natural killer T cells in mice. J Cell Mol Med 2018; 23:1072-1085. [PMID: 30421497 PMCID: PMC6349240 DOI: 10.1111/jcmm.14008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Revised: 10/13/2018] [Accepted: 10/15/2018] [Indexed: 12/20/2022] Open
Abstract
Our previous study showed that intraperitoneal injection of α-galactosylceramide (α-GalCer) has the ability to activate lung iNKT cells, but α-GalCer-activated iNKT cells do not result in airway inflammation in wild-type (WT) mice. Many studies showed that iNKT cells had the capacity to induce Treg cells, which gave rise to peripheral tolerance. Therefore, we examined the influence of intraperitoneal administration of α-GalCer on the expansion and suppressive activity of lung Treg cells using iNKT cell-knockout mice and co-culture experiments in vitro. We also compared airway inflammation and airway hyperresponsiveness (AHR) after α-GalCer administration in specific anti-CD25 mAb-treated mice. Our data showed that intraperitoneal injection of α-GalCer could promote the expansion of lung Treg cells in WT mice, but not in iNKT cell-knockout mice. However, α-GalCer administration could not boost suppressive activity of Treg cells in WT mice and iNKT cell-knockout mice. Interestingly, functional inactivation of Treg cells could induce airway inflammation and AHR in WT mice treated with α-GalCer. Furthermore, α-GalCer administration could enhance iNKT cells to secrete IL-2, and neutralization of IL-2 reduced the expansion of Treg cells in vivo and in vitro. Thus, intraperitoneal administration of α-GalCer can induce the generation of lung Treg cells in mice through the release of IL-2 by the activated iNKT cells.
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Affiliation(s)
- Qianhui Chen
- Department of Respiratory Medicine, Renmin Hospital of Wuhan University, Wuhan, China
| | - Xuxue Guo
- Department of Respiratory Medicine, Renmin Hospital of Wuhan University, Wuhan, China
| | - Nishan Deng
- Department of Respiratory Medicine, Renmin Hospital of Wuhan University, Wuhan, China
| | - Linlin Liu
- Department of Respiratory Medicine, Renmin Hospital of Wuhan University, Wuhan, China
| | - Shuo Chen
- Department of Respiratory Medicine, Renmin Hospital of Wuhan University, Wuhan, China
| | - Ailing Wang
- Nursing Department, Wuhan University School of Health Sciences, Wuhan, China
| | - Ruiyun Li
- Department of Respiratory Medicine, Renmin Hospital of Wuhan University, Wuhan, China
| | - Yi Huang
- Department of Respiratory Medicine, Renmin Hospital of Wuhan University, Wuhan, China
| | - Xuhong Ding
- Department of Respiratory Medicine, Renmin Hospital of Wuhan University, Wuhan, China
| | - Hongying Yu
- Department of Respiratory Medicine, Renmin Hospital of Wuhan University, Wuhan, China
| | - Suping Hu
- Department of Respiratory Medicine, Renmin Hospital of Wuhan University, Wuhan, China
| | - Hanxiang Nie
- Department of Respiratory Medicine, Renmin Hospital of Wuhan University, Wuhan, China
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60
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Tahvildari M, Inomata T, Amouzegar A, Dana R. Regulatory T Cell Modulation of Cytokine and Cellular Networks in Corneal Graft Rejection. CURRENT OPHTHALMOLOGY REPORTS 2018. [DOI: 10.1007/s40135-018-0191-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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61
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Kroger CJ, Clark M, Ke Q, Tisch RM. Therapies to Suppress β Cell Autoimmunity in Type 1 Diabetes. Front Immunol 2018; 9:1891. [PMID: 30166987 PMCID: PMC6105696 DOI: 10.3389/fimmu.2018.01891] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Accepted: 07/31/2018] [Indexed: 12/12/2022] Open
Abstract
Type 1 diabetes (T1D) is an autoimmune disease that is generally considered to be T cell-driven. Accordingly, most strategies of immunotherapy for T1D prevention and treatment in the clinic have targeted the T cell compartment. To date, however, immunotherapy has had only limited clinical success. Although certain immunotherapies have promoted a protective effect, efficacy is often short-term and acquired immunity may be impacted. This has led to the consideration of combining different approaches with the goal of achieving a synergistic therapeutic response. In this review, we will discuss the status of various T1D therapeutic strategies tested in the clinic, as well as possible combinatorial approaches to restore β cell tolerance.
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Affiliation(s)
- Charles J Kroger
- Department of Microbiology and Immunology, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States.,Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
| | - Matthew Clark
- Department of Microbiology and Immunology, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States.,Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
| | - Qi Ke
- Department of Microbiology and Immunology, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States.,Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
| | - Roland M Tisch
- Department of Microbiology and Immunology, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States.,Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
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62
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Hotta-Iwamura C, Benck C, Coley WD, Liu Y, Zhao Y, Quiel JA, Tarbell KV. Low CD25 on autoreactive Tregs impairs tolerance via low dose IL-2 and antigen delivery. J Autoimmun 2018; 90:39-48. [PMID: 29439835 PMCID: PMC5949247 DOI: 10.1016/j.jaut.2018.01.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Revised: 01/17/2018] [Accepted: 01/19/2018] [Indexed: 01/12/2023]
Abstract
Dendritic cell (DC)-mediated T cell tolerance deficiencies contribute to the pathogenesis of autoimmune diseases such as type 1 diabetes. Delivering self-antigen to dendritic-cell inhibitory receptor-2 (DCIR2)+ DCs can delay but not completely block diabetes development in NOD mice. These DCIR2-targeting antibodies induce tolerance via deletion and anergy, but do not increase islet-specific Tregs. Because low-dose IL-2 (LD-IL-2) administration can preferentially expand Tregs, we tested whether delivering islet-antigen to tolerogenic DCIR2+ DCs along with LD-IL-2 would boost islet-specific Tregs and further block autoimmunity. But, surprisingly, adding LD-IL-2 did not increase efficacy of DC-targeted antigen to inhibit diabetes. Here we show the effects of LD-IL-2, with or without antigen delivery to DCIR2+ DCs, on both polyclonal and autoreactive Treg and conventional T cells (Tconv). As expected, LD-IL-2 increased total Tregs, but autoreactive Tregs required both antigen and IL-2 stimulation for optimal expansion. Also, islet-specific Tregs had lower CD25 expression and IL-2 sensitivity, while islet-specific Tconv had higher CD25 expression, compared to polyclonal populations. LD-IL-2 increased activation and expansion of Tconv, and was more pronounced for autoreactive cells after treatment with IL-2 + islet-antigen. Therefore, LD-IL-2 therapy, especially when combined with antigen stimulation, may not optimally activate and expand antigen-specific Tregs in chronic autoimmune settings.
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Affiliation(s)
- Chie Hotta-Iwamura
- Immune Tolerance Section, Diabetes, Endocrinology and Obesity Branch, National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, Maryland, USA
| | - Charles Benck
- Immune Tolerance Section, Diabetes, Endocrinology and Obesity Branch, National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, Maryland, USA
| | - William D Coley
- Immune Tolerance Section, Diabetes, Endocrinology and Obesity Branch, National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, Maryland, USA
| | - Yi Liu
- Immune Tolerance Section, Diabetes, Endocrinology and Obesity Branch, National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, Maryland, USA
| | - Yongge Zhao
- Immune Tolerance Section, Diabetes, Endocrinology and Obesity Branch, National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, Maryland, USA
| | - Juan A Quiel
- Immune Tolerance Section, Diabetes, Endocrinology and Obesity Branch, National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, Maryland, USA
| | - Kristin V Tarbell
- Immune Tolerance Section, Diabetes, Endocrinology and Obesity Branch, National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, Maryland, USA.
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63
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Valentine KM, Davini D, Lawrence TJ, Mullins GN, Manansala M, Al-Kuhlani M, Pinney JM, Davis JK, Beaudin AE, Sindi SS, Gravano DM, Hoyer KK. CD8 Follicular T Cells Promote B Cell Antibody Class Switch in Autoimmune Disease. THE JOURNAL OF IMMUNOLOGY 2018; 201:31-40. [PMID: 29743314 DOI: 10.4049/jimmunol.1701079] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2017] [Accepted: 04/22/2018] [Indexed: 02/04/2023]
Abstract
CD8 T cells can play both a protective and pathogenic role in inflammation and autoimmune development. Recent studies have highlighted the ability of CD8 T cells to function as T follicular helper (Tfh) cells in the germinal center in the context of infection. However, whether this phenomenon occurs in autoimmunity and contributes to autoimmune pathogenesis is largely unexplored. In this study, we show that CD8 T cells acquire a CD4 Tfh profile in the absence of functional regulatory T cells in both the IL-2-deficient and scurfy mouse models. Depletion of CD8 T cells mitigates autoimmune pathogenesis in IL-2-deficient mice. CD8 T cells express the B cell follicle-localizing chemokine receptor CXCR5, a principal Tfh transcription factor Bcl6, and the Tfh effector cytokine IL-21. CD8 T cells localize to the B cell follicle, express B cell costimulatory proteins, and promote B cell differentiation and Ab isotype class switching. These data reveal a novel contribution of autoreactive CD8 T cells to autoimmune disease, in part, through CD4 follicular-like differentiation and functionality.
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Affiliation(s)
- Kristen M Valentine
- Quantitative and Systems Biology Graduate Program, University of California, Merced, Merced, CA 95343
| | - Dan Davini
- Department of Molecular and Cell Biology, School of Natural Sciences, University of California, Merced, Merced, CA 95343
| | - Travis J Lawrence
- Quantitative and Systems Biology Graduate Program, University of California, Merced, Merced, CA 95343
| | - Genevieve N Mullins
- Quantitative and Systems Biology Graduate Program, University of California, Merced, Merced, CA 95343
| | - Miguel Manansala
- Stem Cell Instrumentation Foundry, University of California, Merced, Merced, CA 95343; and
| | - Mufadhal Al-Kuhlani
- Department of Molecular and Cell Biology, School of Natural Sciences, University of California, Merced, Merced, CA 95343
| | - James M Pinney
- Department of Molecular and Cell Biology, School of Natural Sciences, University of California, Merced, Merced, CA 95343
| | - Jason K Davis
- Department of Applied Mathematics, University of California, Merced, Merced, CA 95343
| | - Anna E Beaudin
- Department of Molecular and Cell Biology, School of Natural Sciences, University of California, Merced, Merced, CA 95343
| | - Suzanne S Sindi
- Department of Applied Mathematics, University of California, Merced, Merced, CA 95343
| | - David M Gravano
- Stem Cell Instrumentation Foundry, University of California, Merced, Merced, CA 95343; and
| | - Katrina K Hoyer
- Department of Molecular and Cell Biology, School of Natural Sciences, University of California, Merced, Merced, CA 95343;
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64
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Marangoni F, Zhang R, Mani V, Thelen M, Ali Akbar NJ, Warner RD, Äijö T, Zappulli V, Martinez GJ, Turka LA, Mempel TR. Tumor Tolerance-Promoting Function of Regulatory T Cells Is Optimized by CD28, but Strictly Dependent on Calcineurin. THE JOURNAL OF IMMUNOLOGY 2018; 200:3647-3661. [PMID: 29661826 DOI: 10.4049/jimmunol.1701220] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2017] [Accepted: 03/13/2018] [Indexed: 01/07/2023]
Abstract
Regulatory T cells (Treg) restrain immune responses against malignant tumors, but their global depletion in cancer patients will likely be limited by systemic autoimmune toxicity. Instead, approaches to "tune" their activities may allow for preferential targeting of tumor-reactive Treg. Although Ag recognition regulates Treg function, the roles of individual TCR-dependent signaling pathways in enabling Treg to promote tumor tolerance are not well characterized. In this study, we examined in mouse tumor models the role of calcineurin, a key mediator of TCR signaling, and the role of the costimulatory receptor CD28 in the differentiation of resting central Treg into effector Treg endowed with tumor tropism. We find that calcineurin, although largely dispensable for suppressive activity in vitro, is essential for upregulation of ICOS and CTLA-4 in Treg, as well as for expression of chemokine receptors driving their accumulation in tumors. In contrast, CD28 is not critical, but optimizes the formation of tumor-homing Treg and their fitness in tumor tissue. Accordingly, although deletion of either CnB or CD28 strongly impairs Treg-mediated tumor tolerance, lack of CnB has an even more pronounced impact than lack of CD28. Hence, our studies reveal distinct roles for what has classically been defined as signal 1 and signal 2 of conventional T cell activation in the context of Treg-mediated tumor tolerance.
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Affiliation(s)
- Francesco Marangoni
- Center for Immunology and Inflammatory Diseases, Massachusetts General Hospital, Boston, MA 02114; .,Harvard Medical School, Boston, MA 02115
| | - Ruan Zhang
- Center for Transplantation Sciences, Massachusetts General Hospital, Boston, MA 02114
| | - Vinidhra Mani
- Center for Immunology and Inflammatory Diseases, Massachusetts General Hospital, Boston, MA 02114.,Harvard Medical School, Boston, MA 02115
| | - Martin Thelen
- Center for Immunology and Inflammatory Diseases, Massachusetts General Hospital, Boston, MA 02114
| | - Noor J Ali Akbar
- Center for Immunology and Inflammatory Diseases, Massachusetts General Hospital, Boston, MA 02114
| | - Ross D Warner
- Center for Immunology and Inflammatory Diseases, Massachusetts General Hospital, Boston, MA 02114
| | - Tarmo Äijö
- Center for Computational Biology, Flatiron Institute, New York, NY 10010
| | - Valentina Zappulli
- Department of Comparative Biomedicine and Food Science, University of Padua, 35020 Legnaro, Padua, Italy; and
| | - Gustavo J Martinez
- Department of Microbiology and Immunology, Chicago Medical School, Rosalind Franklin University of Medicine and Science, North Chicago, IL 60064
| | - Laurence A Turka
- Harvard Medical School, Boston, MA 02115.,Center for Transplantation Sciences, Massachusetts General Hospital, Boston, MA 02114
| | - Thorsten R Mempel
- Center for Immunology and Inflammatory Diseases, Massachusetts General Hospital, Boston, MA 02114; .,Harvard Medical School, Boston, MA 02115
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65
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Heiler S, Lötscher J, Kreuzaler M, Rolink J, Rolink A. Prophylactic and Therapeutic Effects of Interleukin-2 (IL-2)/Anti-IL-2 Complexes in Systemic Lupus Erythematosus-Like Chronic Graft-Versus-Host Disease. Front Immunol 2018; 9:656. [PMID: 29670626 PMCID: PMC5893767 DOI: 10.3389/fimmu.2018.00656] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Accepted: 03/16/2018] [Indexed: 11/13/2022] Open
Abstract
Murine chronic graft-versus-host-disease (cGvHD) induced by injection of parental lymphocytes into F1 hybrids results in a disease similar to systemic lupus erythematosus. Here, we have used DBA/2 T cell injection into (C57BL/6 × DBA/2)F1 (BDF1) mice as a model system to test the prophylactic and therapeutic effects of interleukin-2 (IL-2)/anti-IL-2 immune complexes on the course of cGvHD. Our findings demonstrate that pretreatment with Treg inducing JES6/IL-2 complexes render BDF1 mice largely resistant to induction of cGvHD, whereas pretreatment with CD8+ T cell/NK cell inducing S4B6/IL-2 complexes results in a more severe cGvHD. In contrast, treatment with JES6/IL-2 complexes 4 weeks after induction had no beneficial effect on disease symptoms. However, similar treatment with S4B6/IL-2 complexes led to a significant amelioration of the disease. This therapeutic effect seems to be mediated by donor CD8+ T cells. The fact that a much stronger cGvHD is induced in BDF1 mice depleted of donor CD8+ T cells strongly supports this conclusion. The contrasting effects of the two different IL-2 complexes are likely due to different mechanisms.
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Affiliation(s)
- Stefan Heiler
- Developmental and Molecular Immunology, Department of Biomedicine, University of Basel, Basel, Switzerland
| | - Jonas Lötscher
- Developmental and Molecular Immunology, Department of Biomedicine, University of Basel, Basel, Switzerland
| | - Matthias Kreuzaler
- Developmental and Molecular Immunology, Department of Biomedicine, University of Basel, Basel, Switzerland
| | - Johanna Rolink
- Developmental and Molecular Immunology, Department of Biomedicine, University of Basel, Basel, Switzerland
| | - Antonius Rolink
- Developmental and Molecular Immunology, Department of Biomedicine, University of Basel, Basel, Switzerland
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66
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Abstract
Proper regulation of the immune system is required for protection against pathogens and preventing autoimmune disorders. Inborn errors of the immune system due to inherited or de novo germline mutations can lead to the loss of protective immunity, aberrant immune homeostasis, and the development of autoimmune disease, or combinations of these. Forward genetic screens involving clinical material from patients with primary immunodeficiencies (PIDs) can vary in severity from life-threatening disease affecting multiple cell types and organs to relatively mild disease with susceptibility to a limited range of pathogens or mild autoimmune conditions. As central mediators of innate and adaptive immune responses, T cells are critical orchestrators and effectors of the immune response. As such, several PIDs result from loss of or altered T cell function. PID-associated functional defects range from complete absence of T cell development to uncontrolled effector cell activation. Furthermore, the gene products of known PID causal genes are involved in diverse molecular pathways ranging from T cell receptor signaling to regulators of protein glycosylation. Identification of the molecular and biochemical cause of PIDs can not only guide the course of treatment for patients, but also inform our understanding of the basic biology behind T cell function. In this chapter, we review PIDs with known genetic causes that intrinsically affect T cell function with particular focus on perturbations of biochemical pathways.
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Affiliation(s)
- William A Comrie
- Molecular Development of the Immune System Section, Laboratory of Immune System Biology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, United States; Clinical Genomics Program, National Institute of Allergy and Infectious Diseases (NIAID), NIH, Bethesda, MD, United States
| | - Michael J Lenardo
- Molecular Development of the Immune System Section, Laboratory of Immune System Biology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, United States; Clinical Genomics Program, National Institute of Allergy and Infectious Diseases (NIAID), NIH, Bethesda, MD, United States.
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67
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Bioinformatics Analysis of Genes and Pathways of CD11b +/Ly6C intermediate Macrophages after Renal Ischemia-Reperfusion Injury. Curr Med Sci 2018; 38:70-77. [PMID: 30074154 PMCID: PMC7089064 DOI: 10.1007/s11596-018-1848-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2017] [Revised: 11/08/2017] [Indexed: 12/12/2022]
Abstract
Renal ischemia-reperfusion injury (IRI) is a major cause of acute kidney injury (AKI), which could induce the poor prognosis. The purpose of this study was to characterize the molecular mechanism of the functional changes of CDllb+/Ly6Cintermediate macrophages after renal IRI. The gene expression profiles of CDllb+/Ly6Cintermcdiate macrophages of the sham surgery mice, and the mice 4 h, 24 h and 9 days after renal IRI were downloaded from the Gene Expression Omnibus database. Analysis of mRNA expression profiles was conducted to identify differentially expressed genes (DEGs), biological processes and pathways by the series test of cluster. Protein-protein interaction network was constructed and analysed to discover the key genes. A total of 6738 DEGs were identified and assigned to 20 model profiles. DEGs in profile 13 were one of the predominant expression profiles, which are involved in immune cell chemotaxis and proliferation. Signet analysis showed that Atp5al, Atp5o, Cox4i, Cdc42, Rac2 and Nhp2 were the key genes involved in oxidation-reduction, apoptosis, migration, M1-M2 differentiation, and proliferation of macrophages. RPS18 may be an appreciate reference gene as it was stable in macrophages. The identified DEGs and their enriched pathways investigate factors that may participate in the functional changes of CD 1lb+Ly6Cintermediate macrophages after renal IRI. Moreover, the vital gene Nhp2 may involve the polarization of macrophages, which may be a new target to affect the process of AKI
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68
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Giampaolo S, Wójcik G, Serfling E, Patra AK. Interleukin-2-regulatory T cell axis critically regulates maintenance of hematopoietic stem cells. Oncotarget 2018; 8:29625-29642. [PMID: 28415569 PMCID: PMC5444691 DOI: 10.18632/oncotarget.16377] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2016] [Accepted: 03/06/2017] [Indexed: 12/31/2022] Open
Abstract
The role of IL-2 in HSC maintenance is unknown. Here we show that Il2−/− mice develop severe anomalies in HSC maintenance leading to defective hematopoiesis. Whereas, lack of IL-2 signaling was detrimental for lympho- and erythropoiesis, myelopoiesis was enhanced in Il2−/− mice. Investigation of the underlying mechanisms of dysregulated hematopoiesis in Il2−/− mice shows that the IL-2-Treg cell axis is indispensable for HSC maintenance and normal hematopoiesis. Lack of Treg activity resulted in increased IFN-? production by activated T cells and an expansion of the HSCs in the bone marrow (BM). Though, restoring Treg population successfully rescued HSC maintenance in Il2−/− mice, preventing IFN-? activity could do the same even in the absence of Treg cells. Our study suggests that equilibrium in IL-2 and IFN-? activity is critical for steady state hematopoiesis, and in clinical conditions of BM failure, IL-2 or anti-IFN-? treatment might help to restore hematopoiesis.
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Affiliation(s)
- Sabrina Giampaolo
- Department of Molecular Pathology, Institute of Pathology, University of Würzburg, Würzburg, Germany
| | - Gabriela Wójcik
- Institute of Translational and Stratified Medicine, Peninsula Schools of Medicine and Dentistry, University of Plymouth, Plymouth, UK
| | - Edgar Serfling
- Department of Molecular Pathology, Institute of Pathology, University of Würzburg, Würzburg, Germany.,Comprehensive Cancer Center Mainfranken, University of Würzburg, Würzburg, Germany
| | - Amiya K Patra
- Department of Molecular Pathology, Institute of Pathology, University of Würzburg, Würzburg, Germany.,Institute of Translational and Stratified Medicine, Peninsula Schools of Medicine and Dentistry, University of Plymouth, Plymouth, UK
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69
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Toomer KH, Malek TR. Cytokine Signaling in the Development and Homeostasis of Regulatory T cells. Cold Spring Harb Perspect Biol 2018; 10:cshperspect.a028597. [PMID: 28620098 DOI: 10.1101/cshperspect.a028597] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Cytokine signaling is indispensable for regulatory T-cell (Treg) development in the thymus, and also influences the homeostasis, phenotypic diversity, and function of Tregs in the periphery. Because Tregs are required for establishment and maintenance of immunological self-tolerance, investigating the role of cytokines in Treg biology carries therapeutic potential in the context of autoimmune disease. This review discusses the potent and diverse influences of interleukin (IL)-2 signaling on the Treg compartment, an area of knowledge that has led to the use of low-dose IL-2 as a therapy to reregulate autoaggressive immune responses. Evidence suggesting Treg-specific impacts of the cytokines transforming growth factor β (TGF-β), IL-7, thymic stromal lymphopoietin (TSLP), IL-15, and IL-33 is also presented. Finally, we consider the technical challenges and knowledge limitations that must be overcome to bring other cytokine-based, Treg-targeted therapies into clinical use.
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Affiliation(s)
- Kevin H Toomer
- Department of Microbiology and Immunology, Miller School of Medicine, University of Miami, Miami, Florida 33136
| | - Thomas R Malek
- Department of Microbiology and Immunology, Miller School of Medicine, University of Miami, Miami, Florida 33136.,Diabetes Research Institute, Miller School of Medicine, University of Miami, Miami, Florida 33136
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70
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Fan MY, Turka LA. Immunometabolism and PI(3)K Signaling As a Link between IL-2, Foxp3 Expression, and Suppressor Function in Regulatory T Cells. Front Immunol 2018; 9:69. [PMID: 29434595 PMCID: PMC5796885 DOI: 10.3389/fimmu.2018.00069] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2017] [Accepted: 01/10/2018] [Indexed: 01/05/2023] Open
Abstract
CD4+ Foxp3+ regulatory T cells (Tregs) are an essential component of immune homeostasis. Modulation of Treg function has been proposed as a means of treating autoimmune conditions and preventing rejection of organ transplants, although achieving this goal will require a detailed understanding of Treg signaling pathways. Signaling within Tregs is known to differ considerably from that observed in other T cell subsets. Of note, Tregs are the only cell type known to constitutively express CD25, the main ligand-binding subunit of the IL-2 receptor. The PI(3)K/Akt/mTOR cascade constitutes a major signaling pathway downstream of IL-2 and is closely tied to cellular metabolism. Due to increasing recognition of the links between cellular fuel usage and immune cell function, the interplay between IL-2 signaling and Treg metabolism represents an important space for exploration and a potential approach for immunomodulation. Here, we discuss how IL-2 may affect Treg metabolism via PI(3)K signaling, as well as the effects of altered metabolism on Treg lineage stability and suppressor function.
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Affiliation(s)
- Martin Y Fan
- Center for Transplantation Sciences, Department of Surgery, Massachusetts General Hospital, Boston, MA, United States.,Program in Immunology, Division of Medical Sciences, Harvard Medical School, Boston, MA, United States
| | - Laurence A Turka
- Center for Transplantation Sciences, Department of Surgery, Massachusetts General Hospital, Boston, MA, United States.,Program in Immunology, Division of Medical Sciences, Harvard Medical School, Boston, MA, United States
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71
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Ye C, Brand D, Zheng SG. Targeting IL-2: an unexpected effect in treating immunological diseases. Signal Transduct Target Ther 2018; 3:2. [PMID: 29527328 PMCID: PMC5837126 DOI: 10.1038/s41392-017-0002-5] [Citation(s) in RCA: 98] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Revised: 10/10/2017] [Accepted: 10/30/2017] [Indexed: 12/21/2022] Open
Abstract
Regulatory T cells (Treg) play a crucial role in maintaining immune homeostasis since Treg dysfunction in both animals and humans is associated with multi-organ autoimmune and inflammatory disease. While IL-2 is generally considered to promote T-cell proliferation and enhance effector T-cell function, recent studies have demonstrated that treatments that utilize low-dose IL-2 unexpectedly induce immune tolerance and promote Treg development resulting in the suppression of unwanted immune responses and eventually leading to treatment of some autoimmune disorders. In the present review, we discuss the biology of IL-2 and its signaling to help define the key role played by IL-2 in the development and function of Treg cells. We also summarize proof-of-concept clinical trials which have shown that low-dose IL-2 can control autoimmune diseases safely and effectively by specifically expanding and activating Treg. However, future studies will be needed to validate a better and safer dosing strategy for low-dose IL-2 treatments utilizing well-controlled clinical trials. More studies will also be needed to validate the appropriate dose of IL-2/anti-cytokine or IL-2/anti-IL-2 complex in the experimental animal models before moving to the clinic.
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Affiliation(s)
- Congxiu Ye
- Department of Clinical Immunology, Third Affiliated Hospital at Sun Yat-sen University, Guangzhou, China
| | - David Brand
- Research Service, Memphis VA Medical Center, Memphis, TN USA
| | - Song G. Zheng
- Department of Clinical Immunology, Third Affiliated Hospital at Sun Yat-sen University, Guangzhou, China
- Division of Rheumatology, Penn State Milton S. Hershey Medical Center, Hershey, PA USA
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72
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Tahvildari M, Amouzegar A, Foulsham W, Dana R. Therapeutic approaches for induction of tolerance and immune quiescence in corneal allotransplantation. Cell Mol Life Sci 2018; 75:1509-1520. [PMID: 29307015 DOI: 10.1007/s00018-017-2739-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2017] [Revised: 12/12/2017] [Accepted: 12/27/2017] [Indexed: 01/08/2023]
Abstract
The cornea is the most commonly transplanted tissue in the body. Corneal grafts in low-risk recipients enjoy high success rates, yet over 50% of high-risk grafts (with inflamed and vascularized host beds) are rejected. As our understanding of the cellular and molecular pathways that mediate rejection has deepened, a number of novel therapeutic strategies have been unveiled. This manuscript reviews therapeutic approaches to promote corneal transplant survival through targeting (1) corneal lymphangiogenesis and hemangiogenesis, (2) antigen presenting cells, (3) effector and regulatory T cells, and (4) mesenchymal stem cells.
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Affiliation(s)
- Maryam Tahvildari
- Schepens Eye Research Institute, Massachusetts Eye and Ear Infirmary, Harvard Medical School, Boston, MA, USA.,Kresge Eye Institute, Wayne State University, Detroit, MI, USA
| | - Afsaneh Amouzegar
- Schepens Eye Research Institute, Massachusetts Eye and Ear Infirmary, Harvard Medical School, Boston, MA, USA
| | - William Foulsham
- Schepens Eye Research Institute, Massachusetts Eye and Ear Infirmary, Harvard Medical School, Boston, MA, USA
| | - Reza Dana
- Schepens Eye Research Institute, Massachusetts Eye and Ear Infirmary, Harvard Medical School, Boston, MA, USA.
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73
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Schmidt RE, Grimbacher B, Witte T. Autoimmunity and primary immunodeficiency: two sides of the same coin? Nat Rev Rheumatol 2017; 14:7-18. [PMID: 29255211 DOI: 10.1038/nrrheum.2017.198] [Citation(s) in RCA: 84] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Autoimmunity and immunodeficiency were previously considered to be mutually exclusive conditions; however, increased understanding of the complex immune regulatory and signalling mechanisms involved, coupled with the application of genetic analysis, is revealing the complex relationships between primary immunodeficiency syndromes and autoimmune diseases. Single-gene defects can cause rare diseases that predominantly present with autoimmune symptoms. Such genetic defects also predispose individuals to recurrent infections (a hallmark of immunodeficiency) and can cause primary immunodeficiencies, which can also lead to immune dysregulation and autoimmunity. Moreover, risk factors for polygenic rheumatic diseases often exist in the same genes as the mutations that give rise to primary immunodeficiency syndromes. In this Review, various primary immunodeficiency syndromes are presented, along with their pathogenetic mechanisms and relationship to autoimmune diseases, in an effort to increase awareness of immunodeficiencies that occur concurrently with autoimmune diseases and to highlight the need to initiate appropriate genetic tests. The growing knowledge of various genetically determined pathologic mechanisms in patients with immunodeficiencies who have autoimmune symptoms opens up new avenues for personalized molecular therapies that could potentially treat immunodeficiency and autoimmunity at the same time, and that could be further explored in the context of autoimmune rheumatic diseases.
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Affiliation(s)
- Reinhold E Schmidt
- Klinik für Immunologie und Rheumatologie, Medizinische Hochschule Hannover (MHH), Carl-Neuberg Straße 1, D-30625 Hannover, Germany
| | - Bodo Grimbacher
- Centre for Chronic Immunodeficiency, University Medical Centre, University of Freiburg, Faculty of Medicine, Breisacher Straße 115, D-79106 Freiburg, Germany
| | - Torsten Witte
- Klinik für Immunologie und Rheumatologie, Medizinische Hochschule Hannover (MHH), Carl-Neuberg Straße 1, D-30625 Hannover, Germany
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74
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Winkels H, Meiler S, Lievens D, Engel D, Spitz C, Bürger C, Beckers L, Dandl A, Reim S, Ahmadsei M, Hartwig H, Holdt LM, Hristov M, Megens RTA, Schmitt MM, Biessen EA, Borst J, Faussner A, Weber C, Lutgens E, Gerdes N. CD27 co-stimulation increases the abundance of regulatory T cells and reduces atherosclerosis in hyperlipidaemic mice. Eur Heart J 2017; 38:3590-3599. [DOI: 10.1093/eurheartj/ehx517] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/04/2015] [Accepted: 08/28/2017] [Indexed: 12/22/2022] Open
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75
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Galgani M, De Rosa V, La Cava A, Matarese G. Role of Metabolism in the Immunobiology of Regulatory T Cells. THE JOURNAL OF IMMUNOLOGY 2017; 197:2567-75. [PMID: 27638939 DOI: 10.4049/jimmunol.1600242] [Citation(s) in RCA: 81] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2016] [Accepted: 06/25/2016] [Indexed: 02/06/2023]
Abstract
Intracellular metabolism is central to cell activity and function. CD4(+)CD25(+) regulatory T cells (Tregs) that express the transcription factor FOXP3 play a pivotal role in the maintenance of immune tolerance to self. Recent studies showed that the metabolism and function of Tregs are influenced significantly by local environmental conditions and the availability of certain metabolites. It also was reported that defined metabolic programs associate with Treg differentiation, expression of FOXP3, and phenotype stabilization. This article reviews how metabolism modulates FOXP3 expression and Treg function, what environmental factors are involved, and how metabolic manipulation could alter Treg frequency and function in physiopathologic conditions.
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Affiliation(s)
- Mario Galgani
- Istituto di Endocrinologia e Oncologia Sperimentale, Consiglio Nazionale delle Ricerche, 80131 Naples, Italy
| | - Veronica De Rosa
- Istituto di Endocrinologia e Oncologia Sperimentale, Consiglio Nazionale delle Ricerche, 80131 Naples, Italy; Unità di NeuroImmunologia, Istituto di Ricovero e Cura a Carattere Scientifico Fondazione Santa Lucia, 00179 Rome, Italy
| | - Antonio La Cava
- Department of Medicine, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA 90095; and
| | - Giuseppe Matarese
- Dipartimento di Medicina Molecolare e Biotecnologie Mediche, Università di Napoli Federico II, 80131 Naples, Italy
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76
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Ritvo PGG, Churlaud G, Quiniou V, Florez L, Brimaud F, Fourcade G, Mariotti-Ferrandiz E, Klatzmann D. T
fr
cells lack IL-2Rα but express decoy IL-1R2 and IL-1Ra and suppress the IL-1–dependent activation of T
fh
cells. Sci Immunol 2017; 2:2/15/eaan0368. [DOI: 10.1126/sciimmunol.aan0368] [Citation(s) in RCA: 84] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2017] [Revised: 05/26/2017] [Accepted: 07/19/2017] [Indexed: 12/16/2022]
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77
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Panezai J, Bergdahl E, Sundqvist KG. T-cell regulation through a basic suppressive mechanism targeting low-density lipoprotein receptor-related protein 1. Immunology 2017; 152:308-327. [PMID: 28580688 DOI: 10.1111/imm.12770] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2017] [Revised: 05/11/2017] [Accepted: 05/25/2017] [Indexed: 01/01/2023] Open
Abstract
Cell adhesion is generally considered to depend on positive regulation through ligation of integrins and cytokine receptors. However, here we show that T-cell adhesion, and notably also T-cell receptor (TCR) -induced activation, are subject to constant suppression through shedding of low-density lipoprotein receptor-related protein 1 (LRP1). The broad-spectrum metalloprotease inhibitor GM6001 abrogated shedding, so inducing prominent cell surface expression of LRP1 while enhancing TCR-induced activation and adhesion to β1 and β2 integrin ligands, hence arresting the cells. Integrin ligands also inhibited shedding but the effect was less potent than that of GM6001. Unlike GM6001, integrin ligands also induced cell surface expression of full-length thrombospondin-1 (TSP170) and TSP130, which associated with LRP1, and TSP110, which did not associate with LRP1. Cell surface expression of LRP1 and TSP130 were induced exclusively in adhering cells, expression of TSP110 preferentially in non-adhering cells and expression of TSP170 correlated with T-cell motility. The pro-adhesive chemokine CXCL12 also inhibited LRP1 shedding and induced surface expression of TSP170 and TSP130 while inhibiting TSP110. Exogenous TSP-1 and ligation of CD28 inhibited shedding although less effectively than GM6001, and the inhibition through CD28 was independent of TSP-1. Small interfering RNA silencing experiments confirmed involvement of LRP1 and TSP-1 in integrin-dependent adhesion and TCR-induced activation. Hence, the poor LRP1 expression in T cells depends on shedding. Integrin ligands and CXCL12 antagonize shedding through a TSP-1-dependent pathway and ligation of CD28 antagonizes shedding independent of TSP-1. The disappearance of LRP1 from the cell surface may provide basic immunosuppression at the T-cell level.
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Affiliation(s)
- Jeneen Panezai
- Division of Periodontology, Department of Dental Medicine, Karolinska Institute at Karolinska University Hospital, Stockholm, Sweden.,Department of Periodontology, Altamash Institute of Dental Medicine, Karachi, Pakistan
| | - Eva Bergdahl
- Division of Clinical Immunology, Department of Laboratory Medicine, Karolinska Institute at Karolinska University Hospital, Stockholm, Sweden
| | - Karl-Gösta Sundqvist
- Division of Clinical Immunology, Department of Laboratory Medicine, Karolinska Institute at Karolinska University Hospital, Stockholm, Sweden
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78
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CD11a/ICAM-1 blockade combined with IL-2 targeting therapy causes a paradoxical acceleration of type 1 diabetes. Immunol Cell Biol 2017; 95:803-813. [PMID: 28611472 DOI: 10.1038/icb.2017.49] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2016] [Revised: 06/06/2017] [Accepted: 06/07/2017] [Indexed: 12/12/2022]
Abstract
Enhancement of regulatory T-cell (Treg) function is the goal of many immunotherapies aimed at treating type 1 diabetes (T1D). The use of interleukin (IL)-2 is hindered by its effects on other populations such as effector T cells and NK cells. Combination therapies aimed at suppressing effector T cells while using IL-2 to expand Tregs could be beneficial and have been trialed in T1D patients. We have investigated a combination therapy using IL-2 and αCD11a blocking antibody to simultaneously expand Tregs and suppress the activation and migration of autoreactive T cells. When non-obese diabetic mice were treated with low-dose IL-2/anti-IL-2 complexes (IL-2c) and αCD11a, significant Treg expansion occurred in both the spleen and pancreas. Activation and IFNγ production by islet-specific T cells was robustly suppressed in the periphery following IL-2c/αCD11a treatment. Surprisingly, combination therapy accelerated diabetes onset compared with control treatments. Analysis of IL-2 responsive populations found that combination therapy increased the activation of CD8+ T cells and natural killer (NK) cells specifically within the pancreas despite concomitant Treg expansion. Blocking effector T-cell migration with the inhibitor FTY720 together with IL-2c treatment also resulted in intra-pancreatic expansion of effector cell populations. Thus, inhibiting effector T-cell migration into the islets unleashes islet-resident pathogenic effectors in the presence of low doses of exogenous IL-2.
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79
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Hu DY, Wirasinha RC, Goodnow CC, Daley SR. IL-2 prevents deletion of developing T-regulatory cells in the thymus. Cell Death Differ 2017; 24:1007-1016. [PMID: 28362433 DOI: 10.1038/cdd.2017.38] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2017] [Revised: 02/21/2017] [Accepted: 02/27/2017] [Indexed: 12/12/2022] Open
Abstract
In the thymus, strongly self-reactive T cells may undergo apoptotic deletion or differentiate into Foxp3+ T-regulatory (T-reg) cells. Mechanisms that partition T cells into these two fates are unclear. Here, we show that IL-2 signalling is required to prevent deletion of CD4+ CD8- CCR7+ Helios+ thymocytes poised to upregulate Foxp3. The deletion prevented by IL-2 signalling is Foxp3 independent and occurs later in thymocyte development than the deletion that is prevented by Card11 signalling. Our results distinguish two bottlenecks at which strongly self-reactive thymocytes undergo deletion or progress to the next stage of T-reg differentiation; Card11 regulates the first bottleneck and IL-2 regulates the second.
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Affiliation(s)
- Daniel Y Hu
- Immunology Department, The John Curtin School of Medical Research, The Australian National University, Canberra 0200, Australia
| | - Rushika C Wirasinha
- Infection and Immunity Program, Monash Biomedicine Discovery Institute and Department of Biochemistry and Molecular Biology, Monash University, Melbourne, VIC 3800, Australia
| | - Christopher C Goodnow
- Immunology Department, The John Curtin School of Medical Research, The Australian National University, Canberra 0200, Australia.,Immunology Division, Garvan Institute of Medical Research, Sydney, NSW 2010, Australia
| | - Stephen R Daley
- Immunology Department, The John Curtin School of Medical Research, The Australian National University, Canberra 0200, Australia.,Infection and Immunity Program, Monash Biomedicine Discovery Institute and Department of Biochemistry and Molecular Biology, Monash University, Melbourne, VIC 3800, Australia
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80
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Wang YM, Zhang GY, Wang Y, Hu M, Zhou JJ, Sawyer A, Cao Q, Wang Y, Zheng G, Lee VWS, Harris DCH, Alexander SI. Exacerbation of spontaneous autoimmune nephritis following regulatory T cell depletion in B cell lymphoma 2-interacting mediator knock-out mice. Clin Exp Immunol 2017; 188:195-207. [PMID: 28152566 PMCID: PMC5383436 DOI: 10.1111/cei.12937] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/17/2017] [Indexed: 02/02/2023] Open
Abstract
Regulatory T cells (Tregs ) have been recognized as central mediators for maintaining peripheral tolerance and limiting autoimmune diseases. The loss of Tregs or their function has been associated with exacerbation of autoimmune disease. However, the temporary loss of Tregs in the chronic spontaneous disease model has not been investigated. In this study, we evaluated the role of Tregs in a novel chronic spontaneous glomerulonephritis model of B cell lymphoma 2-interacting mediator (Bim) knock-out mice by transient depleting Tregs . Bim is a pro-apoptotic member of the B cell lymphoma 2 (Bcl-2) family. Bim knock-out (Bim-/- ) mice fail to delete autoreactive T cells in thymus, leading to chronic spontaneous autoimmune kidney disease. We found that Treg depletion in Bim-/- mice exacerbated the kidney injury with increased proteinuria, impaired kidney function, weight loss and greater histological injury compared with wild-type mice. There was a significant increase in interstitial infiltrate of inflammatory cells, antibody deposition and tubular damage. Furthermore, the serum levels of cytokines interleukin (IL)-2, IL-4, IL-6, IL-10, IL-17α, interferon (IFN)-γ and tumour necrosis factor (TNF)-α were increased significantly after Treg depletion in Bim-/- mice. This study demonstrates that transient depletion of Tregs leads to enhanced self-reactive T effector cell function followed by exacerbation of kidney disease in the chronic spontaneous kidney disease model of Bim-deficient mice.
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Affiliation(s)
- Y. M. Wang
- Centre for Kidney ResearchThe Children's Hospital at WestmeadWestmeadNSWAustralia
| | - G. Y. Zhang
- Centre for Kidney ResearchThe Children's Hospital at WestmeadWestmeadNSWAustralia
| | - Y. Wang
- Centre for Transplantation and Renal ResearchUniversity of Sydney at Westmead Millennium InstituteWestmeadNSWAustralia
| | - M. Hu
- Centre for Transplantation and Renal ResearchUniversity of Sydney at Westmead Millennium InstituteWestmeadNSWAustralia
| | - J. J. Zhou
- Centre for Kidney ResearchThe Children's Hospital at WestmeadWestmeadNSWAustralia
| | - A. Sawyer
- Centre for Kidney ResearchThe Children's Hospital at WestmeadWestmeadNSWAustralia
| | - Q. Cao
- Centre for Transplantation and Renal ResearchUniversity of Sydney at Westmead Millennium InstituteWestmeadNSWAustralia
| | - Y. Wang
- Centre for Transplantation and Renal ResearchUniversity of Sydney at Westmead Millennium InstituteWestmeadNSWAustralia
| | - G. Zheng
- Centre for Transplantation and Renal ResearchUniversity of Sydney at Westmead Millennium InstituteWestmeadNSWAustralia
| | - V. W. S. Lee
- Centre for Transplantation and Renal ResearchUniversity of Sydney at Westmead Millennium InstituteWestmeadNSWAustralia
| | - D. C. H. Harris
- Centre for Transplantation and Renal ResearchUniversity of Sydney at Westmead Millennium InstituteWestmeadNSWAustralia
| | - S. I. Alexander
- Centre for Kidney ResearchThe Children's Hospital at WestmeadWestmeadNSWAustralia
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81
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Abstract
CD4+Foxp3+ regulatory T cells (Tregs) play a central role in the maintenance of immune tolerance after hematopoietic stem cell transplantation. We previously reported that low-dose interleukin-2 (IL-2) therapy increased circulating Tregs and improved clinical symptoms of chronic graft-versus-host-disease (cGVHD); however, the mechanisms that regulate Treg homeostasis during IL-2 therapy have not been well studied. To elucidate these regulatory mechanisms, we examined the role of inhibitory coreceptors on Tregs during IL-2 therapy in a murine model and in patients with cGVHD. Murine studies demonstrated that low-dose IL-2 selectively increased Tregs and simultaneously enhanced the expression of programmed cell death 1 (PD-1), especially on CD44+CD62L+ central-memory Tregs, whereas expression of other inhibitory molecules, including CTLA-4, LAG-3, and TIM-3 remained stable. PD-1-deficient Tregs showed rapid Stat5 phosphorylation and proliferation soon after IL-2 initiation, but thereafter Tregs became proapoptotic with higher Fas and lower Bcl-2 expression. As a result, the positive impact of IL-2 on Tregs was completely abolished, and Treg levels returned to baseline despite continued IL-2 administration. We also examined circulating Tregs from patients with cGVHD who were receiving low-dose IL-2 and found that IL-2-induced Treg proliferation was promptly followed by increased PD-1 expression on central-memory Tregs. Notably, clinical improvement of GVHD was associated with increased levels of PD-1 on Tregs, suggesting that the PD-1 pathway supports Treg-mediated tolerance. These studies indicate that PD-1 is a critical homeostatic regulator for Tregs by modulating proliferation and apoptosis during IL-2 therapy. Our findings will facilitate the development of therapeutic strategies that modulate Treg homeostasis to promote immune tolerance.
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82
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Ehx G, Fransolet G, de Leval L, D'Hondt S, Lucas S, Hannon M, Delens L, Dubois S, Drion P, Beguin Y, Humblet-Baron S, Baron F. Azacytidine prevents experimental xenogeneic graft-versus-host disease without abrogating graft-versus-leukemia effects. Oncoimmunology 2017. [PMID: 28638744 DOI: 10.1080/2162402x.2017.1314425] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
The demethylating agent 5-azacytidine (AZA) has proven its efficacy in the treatment of myelodysplastic syndrome and acute myeloid leukemia. In addition, AZA can demethylate FOXP3 intron 1 (FOXP3i1) leading to the generation of regulatory T cells (Treg). Here, we investigated the impact of AZA on xenogeneic graft-vs.-host disease (xGVHD) and graft-vs.-leukemia effects in a humanized murine model of transplantation (human PBMCs-infused NSG mice), and described the impact of the drug on human T cells in vivo. We observed that AZA improved both survival and xGVHD scores. Further, AZA significantly decreased human T-cell proliferation as well as IFNγ and TNF-α serum levels, and reduced the expression of GRANZYME B and PERFORIN 1 by cytotoxic T cells. In addition, AZA significantly increased Treg frequency through hypomethylation of FOXP3i1 as well as increased Treg proliferation. The latter was subsequent to higher STAT5 signaling in Treg from AZA-treated mice, which resulted from higher IL-2 secretion by conventional T cells from AZA-treated mice itself secondary to demethylation of the IL-2 gene promoter by AZA. Importantly, Tregs harvested from AZA-treated mice were suppressive and stable over time since they persisted at high frequency in secondary transplant experiments. Finally, graft-vs.-leukemia effects (assessed by growth inhibition of THP-1 cells, transfected to express the luciferase gene) were not abrogated by AZA. In summary, our data demonstrate that AZA prevents xGVHD without abrogating graft-vs.-leukemia effects. These findings could serve as basis for further studies of GVHD prevention by AZA in acute myeloid leukemia patients offered an allogeneic transplantation.
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Affiliation(s)
- Grégory Ehx
- Groupe Interdisciplinaire de Génoprotéomique Appliquée (GIGA)-I3, University of Liège, Liège, Belgium
| | - Gilles Fransolet
- Groupe Interdisciplinaire de Génoprotéomique Appliquée (GIGA)-I3, University of Liège, Liège, Belgium
| | - Laurence de Leval
- Institute of Pathology, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland
| | - Stéphanie D'Hondt
- de Duve Institute, Université catholique de Louvain, Brussels, Belgium
| | - Sophie Lucas
- de Duve Institute, Université catholique de Louvain, Brussels, Belgium
| | - Muriel Hannon
- Groupe Interdisciplinaire de Génoprotéomique Appliquée (GIGA)-I3, University of Liège, Liège, Belgium
| | - Loïc Delens
- Groupe Interdisciplinaire de Génoprotéomique Appliquée (GIGA)-I3, University of Liège, Liège, Belgium
| | - Sophie Dubois
- Groupe Interdisciplinaire de Génoprotéomique Appliquée (GIGA)-I3, University of Liège, Liège, Belgium
| | - Pierre Drion
- Experimental Surgery unit, GIGA & Credec, University of Liege, Liège, Belgium
| | - Yves Beguin
- Groupe Interdisciplinaire de Génoprotéomique Appliquée (GIGA)-I3, University of Liège, Liège, Belgium.,Department of Medicine, Division of Hematology, University of Liège, Liège, Belgium
| | - Stéphanie Humblet-Baron
- VIB Center for Brain & Disease Research, Leuven; KU Leuven, Department of Microbiology and Immunology, Leuven, Belgium
| | - Frédéric Baron
- Groupe Interdisciplinaire de Génoprotéomique Appliquée (GIGA)-I3, University of Liège, Liège, Belgium.,Department of Medicine, Division of Hematology, University of Liège, Liège, Belgium
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83
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Abstract
Drug development for the treatment of systemic lupus erythematosus (SLE) has largely focused on B-cell therapies. A greater understanding of the immunopathogenesis of SLE coupled with advanced bioengineering has allowed for clinical trials centered on other targets for SLE therapy. The authors discuss the benefits and shortcomings of focusing on T-cell-directed therapies in SLE and lupus nephritis clinical trials.
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Affiliation(s)
- P Nandkumar
- Division of Rheumatology, Northwell Health, Great Neck, NY, USA
| | - R Furie
- Division of Rheumatology, Northwell Health, Great Neck, NY, USA
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84
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PD-1 modulates regulatory T-cell homeostasis during low-dose interleukin-2 therapy. Blood 2017; 129:2186-2197. [PMID: 28151427 DOI: 10.1182/blood-2016-09-741629] [Citation(s) in RCA: 124] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Accepted: 01/18/2017] [Indexed: 12/15/2022] Open
Abstract
CD4+Foxp3+ regulatory T cells (Tregs) play a central role in the maintenance of immune tolerance after hematopoietic stem cell transplantation. We previously reported that low-dose interleukin-2 (IL-2) therapy increased circulating Tregs and improved clinical symptoms of chronic graft-versus-host-disease (cGVHD); however, the mechanisms that regulate Treg homeostasis during IL-2 therapy have not been well studied. To elucidate these regulatory mechanisms, we examined the role of inhibitory coreceptors on Tregs during IL-2 therapy in a murine model and in patients with cGVHD. Murine studies demonstrated that low-dose IL-2 selectively increased Tregs and simultaneously enhanced the expression of programmed cell death 1 (PD-1), especially on CD44+CD62L+ central-memory Tregs, whereas expression of other inhibitory molecules, including CTLA-4, LAG-3, and TIM-3 remained stable. PD-1-deficient Tregs showed rapid Stat5 phosphorylation and proliferation soon after IL-2 initiation, but thereafter Tregs became proapoptotic with higher Fas and lower Bcl-2 expression. As a result, the positive impact of IL-2 on Tregs was completely abolished, and Treg levels returned to baseline despite continued IL-2 administration. We also examined circulating Tregs from patients with cGVHD who were receiving low-dose IL-2 and found that IL-2-induced Treg proliferation was promptly followed by increased PD-1 expression on central-memory Tregs. Notably, clinical improvement of GVHD was associated with increased levels of PD-1 on Tregs, suggesting that the PD-1 pathway supports Treg-mediated tolerance. These studies indicate that PD-1 is a critical homeostatic regulator for Tregs by modulating proliferation and apoptosis during IL-2 therapy. Our findings will facilitate the development of therapeutic strategies that modulate Treg homeostasis to promote immune tolerance.
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85
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Wang YM, Ghali J, Zhang GY, Hu M, Wang Y, Sawyer A, Zhou JJ, Hapudeniya DA, Wang Y, Cao Q, Zheng G, Harris DC, Alexander SI. Development and function of Foxp3(+) regulatory T cells. Nephrology (Carlton) 2016; 21:81-5. [PMID: 26461175 DOI: 10.1111/nep.12652] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2015] [Revised: 10/05/2015] [Accepted: 10/13/2015] [Indexed: 01/07/2023]
Abstract
Regulatory T cells (Tregs) have been recognized as having a major role in maintaining peripheral tolerance and preventing and limiting autoimmune and chronic inflammatory diseases. Tregs derive from the thymus and also develop peripherally. In this review, we discuss recent progress in our understanding of the basic mechanisms involved in Treg development and function in protecting against autoimmunity in the periphery, including thymic selection, peripheral induction and the many mechanisms of Treg suppression. Specifically in kidney disease, Tregs have been shown to play a role in limiting injury and may potentially have a therapeutic role.
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Affiliation(s)
- Yuan Min Wang
- Centre for Kidney Research, Children's Hospital at Westmead, The University of Sydney, Sidney, New South Wales, Australia
| | - Joanna Ghali
- Centre for Inflammatory Diseases, Monash University, Melbourne, Victoria, Australia
| | - Geoff Yu Zhang
- Centre for Kidney Research, Children's Hospital at Westmead, The University of Sydney, Sidney, New South Wales, Australia
| | - Min Hu
- Centre for Transplantation and Renal Research, University of Sydney at Westmead Millennium Institute, Sidney, New South Wales, Australia
| | - Ya Wang
- Centre for Transplantation and Renal Research, University of Sydney at Westmead Millennium Institute, Sidney, New South Wales, Australia
| | - Andrew Sawyer
- Centre for Kidney Research, Children's Hospital at Westmead, The University of Sydney, Sidney, New South Wales, Australia
| | - Jimmy Jianheng Zhou
- Centre for Kidney Research, Children's Hospital at Westmead, The University of Sydney, Sidney, New South Wales, Australia
| | - Dhanushka A Hapudeniya
- Centre for Kidney Research, Children's Hospital at Westmead, The University of Sydney, Sidney, New South Wales, Australia
| | - Yiping Wang
- Centre for Transplantation and Renal Research, University of Sydney at Westmead Millennium Institute, Sidney, New South Wales, Australia
| | - Qi Cao
- Centre for Transplantation and Renal Research, University of Sydney at Westmead Millennium Institute, Sidney, New South Wales, Australia
| | - Guoping Zheng
- Centre for Transplantation and Renal Research, University of Sydney at Westmead Millennium Institute, Sidney, New South Wales, Australia
| | - David C Harris
- Centre for Transplantation and Renal Research, University of Sydney at Westmead Millennium Institute, Sidney, New South Wales, Australia
| | - Stephen I Alexander
- Centre for Kidney Research, Children's Hospital at Westmead, The University of Sydney, Sidney, New South Wales, Australia
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86
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Increased Epithelial Gap Density in the Noninflamed Duodenum of Children With Inflammatory Bowel Diseases. J Pediatr Gastroenterol Nutr 2016; 63:644-650. [PMID: 26933801 DOI: 10.1097/mpg.0000000000001182] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
OBJECTIVES Inflammatory bowel diseases (IBD) present commonly in childhood, with unknown etiology, but an important role for the epithelial lining is suggested. Epithelial cell extrusion, measured by counting gaps between epithelial cells, is higher in adult patients with Crohn disease (CD) than in controls. Our objectives were to compare epithelial gaps in the duodenum of IBD and non-IBD pediatric patients, to study the correlation between epithelial gaps, inflammation, and disease activity, and identify potential mechanisms. METHODS Epithelial gap density of the duodenum was evaluated using probe-based confocal laser endomicroscopy in 26 pediatric patients with IBD (16 CD, 10 ulcerative colitis [UC]) and 17 non-IBD controls during endoscopy. Epithelial gaps were correlated with serum inflammatory markers, disease activity indices, and intraepithelial lymphocytes. A panel of 10 inflammatory cytokines and expression of TNFAIP3 (A20; inhibits NF-κβ-induced inflammation) were analyzed in duodenal and ileal biopsies. RESULTS Confocal imaging showed significantly higher epithelial gap density in patients with IBD, including UC. Interleukin (IL)-2 and IL-8 were higher in duodenal but not ileal biopsies of patients with UC. No significant correlation was present between C-reactive protein, erythrocyte sedimentation rate, disease activity indices, and epithelial gaps in patients with UC. In patients with CD, C-reactive protein positively correlated with epithelial gaps. A20 expression in the duodenum was unchanged among non-IBD and IBD cases. CONCLUSIONS Duodenal epithelial gaps are increased in pediatric patients with IBD (including UC) but are unrelated to inflammation. This suggests that altered epithelial barrier is an important systemic feature of pediatric IBD and is not only secondary to inflammation.
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87
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Chinen T, Kannan AK, Levine AG, Fan X, Klein U, Zheng Y, Gasteiger G, Feng Y, Fontenot JD, Rudensky AY. An essential role for the IL-2 receptor in T reg cell function. Nat Immunol 2016; 17:1322-1333. [PMID: 27595233 PMCID: PMC5071159 DOI: 10.1038/ni.3540] [Citation(s) in RCA: 554] [Impact Index Per Article: 69.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2015] [Accepted: 07/27/2016] [Indexed: 12/12/2022]
Abstract
Regulatory T cells (Treg cells), which have abundant expression of the interleukin 2 receptor (IL-2R), are reliant on IL-2 produced by activated T cells. This feature indicates a key role for a simple network based on the consumption of IL-2 by Treg cells in their suppressor function. However, congenital deficiency in IL-2R results in reduced expression of the Treg cell lineage-specification factor Foxp3, which has confounded experimental efforts to understand the role of IL-2R expression and signaling in the suppressor function of Treg cells. Using genetic gain- and loss-of-function approaches, we found that capture of IL-2 was dispensable for the control of CD4+ T cells but was important for limiting the activation of CD8+ T cells, and that IL-2R-dependent activation of the transcription factor STAT5 had an essential role in the suppressor function of Treg cells separable from signaling via the T cell antigen receptor.
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Affiliation(s)
- Takatoshi Chinen
- Howard Hughes Medical Institute and Immunology Program, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | | | - Andrew G Levine
- Howard Hughes Medical Institute and Immunology Program, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Xiying Fan
- Howard Hughes Medical Institute and Immunology Program, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Ulf Klein
- Herbert Irving Comprehensive Cancer Center, Department of Pathology and Cell Biology, and Department of Microbiology and Immunology, Columbia University, New York, NY, USA
| | - Ye Zheng
- Nomis Foundation Laboratories for Immunobiology and Microbial Pathogenesis, The Salk Institute for Biological Studies, La Jolla, CA, USA
| | - Georg Gasteiger
- Howard Hughes Medical Institute and Immunology Program, Memorial Sloan Kettering Cancer Center, New York, NY, USA
- Institute for Medical Microbiology and Hygiene, University of Mainz Medical Centre, Mainz, Germany
| | - Yongqiang Feng
- Howard Hughes Medical Institute and Immunology Program, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | | | - Alexander Y Rudensky
- Howard Hughes Medical Institute and Immunology Program, Memorial Sloan Kettering Cancer Center, New York, NY, USA
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88
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Shu Y, Hu Q, Long H, Chang C, Lu Q, Xiao R. Epigenetic Variability of CD4+CD25+ Tregs Contributes to the Pathogenesis of Autoimmune Diseases. Clin Rev Allergy Immunol 2016; 52:260-272. [DOI: 10.1007/s12016-016-8590-3] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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89
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Richards AL, Kapp LM, Wang X, Howie HL, Hudson KE. Regulatory T Cells Are Dispensable for Tolerance to RBC Antigens. Front Immunol 2016; 7:348. [PMID: 27698653 PMCID: PMC5027202 DOI: 10.3389/fimmu.2016.00348] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2016] [Accepted: 08/30/2016] [Indexed: 02/03/2023] Open
Abstract
Autoimmune hemolytic anemia (AIHA) occurs when pathogenic autoantibodies against red blood cell (RBC) antigens are generated. While the basic disease pathology of AIHA is well studied, the underlying mechanism(s) behind the failure in tolerance to RBC autoantigens are poorly understood. Thus, to investigate the tolerance mechanisms required for the establishment and maintenance of tolerance to RBC antigens, we developed a novel murine model. With this model, we evaluated the role of regulatory T cells (Tregs) in tolerance to RBC-specific antigens. Herein, we show that neither sustained depletion of Tregs nor immunization with RBC-specific proteins in conjunction with Treg depletion led to RBC-specific autoantibody generation. Thus, these studies demonstrate that Tregs are not required to prevent autoantibodies to RBCs and suggest that other tolerance mechanisms are likely involved.
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Affiliation(s)
| | - Linda M Kapp
- Bloodworks Northwest Research Institute , Seattle, WA , USA
| | - Xiaohong Wang
- Bloodworks Northwest Research Institute , Seattle, WA , USA
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90
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Kasper IR, Apostolidis SA, Sharabi A, Tsokos GC. Empowering Regulatory T Cells in Autoimmunity. Trends Mol Med 2016; 22:784-797. [PMID: 27461103 PMCID: PMC5003773 DOI: 10.1016/j.molmed.2016.07.003] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2016] [Revised: 07/07/2016] [Accepted: 07/11/2016] [Indexed: 02/07/2023]
Abstract
Regulatory T cells (Tregs) are capable of dampening immune-mediated inflammation and avert the destructive effects of uncontrolled inflammation. Distinct molecules and pathways, including various transcription factors, phosphatases, and kinases, impact the ability of Tregs to function as negative regulators of the immune response, and are presumably amenable to therapeutic manipulation. Here, we discuss recently identified molecular networks and the therapeutic potential for treating autoimmune diseases.
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Affiliation(s)
- Isaac R Kasper
- Division of Rheumatology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA.
| | - Sokratis A Apostolidis
- Division of Rheumatology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA
| | - Amir Sharabi
- Division of Rheumatology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA; Department of Clinical Immunology, Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, 69978, Israel
| | - George C Tsokos
- Division of Rheumatology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA.
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91
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Shou J, Zhang Z, Lai Y, Chen Z, Huang J. Worse outcome in breast cancer with higher tumor-infiltrating FOXP3+ Tregs : a systematic review and meta-analysis. BMC Cancer 2016; 16:687. [PMID: 27566250 PMCID: PMC5002190 DOI: 10.1186/s12885-016-2732-0] [Citation(s) in RCA: 86] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2015] [Accepted: 08/01/2016] [Indexed: 12/23/2022] Open
Abstract
Background Forkhead box P3(FOXP3) is known as the optimum maker for regulatory T cells(Tregs), which are conventionally thought to induce immune tolerance to disturb the antitumor immunity. However, the research on the prognostic significance of tumor-infiltrating FOXP3+ Tregs in breast cancer is still limited and the results are controversial. Methods We searched for studies in PubMed, EMBASE and Web of Science prior to January 2015. The correlation between FOXP3+ tumor-infiltrating lymphocytes(TILs) and breast cancer prognosis was analyzed. The meta-analysis was performed using STATA 11.0. Pooled hazard ratios (HRs) with 95 % confidence intervals (CIs) were used to estimate the degree of the association between FOXP3+ TILs and prognosis of breast cancers, while relative ratios (RRs) were used to evaluate the relationship between FOXP3+ TILs and clinicopathological features of breast cancers. Result A total of 15 studies comprising 8666 breast cancer patients met the inclusion criteria. Our results showed that higher FOXP3+ TILs level was significantly associated with poor prognosis in terms of overall survival (OS) (pooled HR:1.60, 95 % CI:1.06–2.42; P < 0.05). We found that breast cancer with higher FOXP3+ TILs level was positively correlated with c-erbB-2 positive status (pooled RR:1.52, 95 % CI:1.32–1.75; P < 0.05), lymph node positive status(pooled RR:1.17, 95 % CI:1.04–1.32; P < 0.05) while there was a negative association with ER positive status(pooled RR:0.65, 95 % CI:0.56–0.76; P < 0.05) and PR positive status(pooled RR:0.66, 95 % CI:0.51–0.87; P < 0.05). Conclusion The present results of meta-analysis showed that higher FOXP3+ TILs level in patients with breast cancer led to poor overall survival (OS) and was significantly associated with c-erbB-2 status, lymph node status, ER status and PR status. FOXP3+ TILs level is a promising prognostic factor in breast cancer. Electronic supplementary material The online version of this article (doi:10.1186/s12885-016-2732-0) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Jiafeng Shou
- Cancer Institute (Key Laboratory of Cancer Prevention and Intervention, National Ministry of Education, Provincial Key Laboratory of Molecular Biology in MedicalSciences), The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 31009, China
| | - Zhigang Zhang
- Cancer Institute (Key Laboratory of Cancer Prevention and Intervention, National Ministry of Education, Provincial Key Laboratory of Molecular Biology in MedicalSciences), The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 31009, China
| | - Yucheng Lai
- Cancer Institute (Key Laboratory of Cancer Prevention and Intervention, National Ministry of Education, Provincial Key Laboratory of Molecular Biology in MedicalSciences), The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 31009, China
| | - Zhigang Chen
- Cancer Institute (Key Laboratory of Cancer Prevention and Intervention, National Ministry of Education, Provincial Key Laboratory of Molecular Biology in MedicalSciences), The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 31009, China.,Department of Oncology, Second Affiliated Hospital, ZhejiangUniversity School of Medicine, Hangzhou, 310009, China
| | - Jian Huang
- Cancer Institute (Key Laboratory of Cancer Prevention and Intervention, National Ministry of Education, Provincial Key Laboratory of Molecular Biology in MedicalSciences), The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 31009, China. .,Department of Oncology, Second Affiliated Hospital, ZhejiangUniversity School of Medicine, Hangzhou, 310009, China.
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92
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Gravano DM, Al-Kuhlani M, Davini D, Sanders PD, Manilay JO, Hoyer KK. CD8 + T cells drive autoimmune hematopoietic stem cell dysfunction and bone marrow failure. J Autoimmun 2016; 75:58-67. [PMID: 27453063 DOI: 10.1016/j.jaut.2016.07.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Revised: 07/06/2016] [Accepted: 07/15/2016] [Indexed: 11/24/2022]
Abstract
Bone marrow (BM) failure syndrome encompasses a group of disorders characterized by BM stem cell dysfunction, resulting in varying degrees of hypoplasia and blood pancytopenia, and in many patients is autoimmune and inflammatory in nature. The important role of T helper 1 (Th1) polarized CD4+ T cells in driving BM failure has been clearly established in several models. However, animal model data demonstrating a functional role for CD8+ T cells in BM dysfunction is largely lacking and our objective was to test the hypothesis that CD8+ T cells play a non-redundant role in driving BM failure. Clinical evidence implicates a detrimental role for CD8+ T cells in BM failure and a beneficial role for Foxp3+ regulatory T cells (Tregs) in maintaining immune tolerance in the BM. We demonstrate that IL-2-deficient mice, which have a deficit in functional Tregs, develop spontaneous BM failure. Furthermore, we demonstrate a critical role for CD8+ T cells in the development of BM failure, which is dependent on the cytokine, IFNγ. CD8+ T cells promote hematopoietic stem cell dysfunction and depletion of myeloid lineage progenitor cells, resulting in anemia. Adoptive transfer experiments demonstrate that CD8+ T cells dramatically expedite disease progression and promote CD4+ T cell accumulation in the BM. Thus, BM dysregulation in IL-2-deficient mice is mediated by a Th1 and IFNγ-producing CD8+ T cell (Tc1) response.
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Affiliation(s)
- David M Gravano
- Department of Molecular and Cell Biology, School of Natural Sciences, University of California Merced, 5200 N. Lake Rd., Merced, CA 95343, USA
| | - Mufadhal Al-Kuhlani
- Department of Molecular and Cell Biology, School of Natural Sciences, University of California Merced, 5200 N. Lake Rd., Merced, CA 95343, USA
| | - Dan Davini
- Department of Molecular and Cell Biology, School of Natural Sciences, University of California Merced, 5200 N. Lake Rd., Merced, CA 95343, USA
| | - P Dominick Sanders
- Department of Molecular and Cell Biology, School of Natural Sciences, University of California Merced, 5200 N. Lake Rd., Merced, CA 95343, USA
| | - Jennifer O Manilay
- Department of Molecular and Cell Biology, School of Natural Sciences, University of California Merced, 5200 N. Lake Rd., Merced, CA 95343, USA; Health Sciences Research Institute, University of California Merced, 5200 N. Lake Rd., Merced, CA 95343, USA
| | - Katrina K Hoyer
- Department of Molecular and Cell Biology, School of Natural Sciences, University of California Merced, 5200 N. Lake Rd., Merced, CA 95343, USA; Health Sciences Research Institute, University of California Merced, 5200 N. Lake Rd., Merced, CA 95343, USA.
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93
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Abstract
Regulatory T (Treg) cells that express the transcription factor forkhead box protein P3 (FOXP3) play an essential role in enforcing immune tolerance to self tissues, regulating host-commensal flora interaction, and facilitating tissue repair. Their deficiency and/or dysfunction trigger unbridled autoimmunity and inflammation. A growing number of monogenic defects have been recognized that adversely impact Treg cell development, differentiation, and/or function, leading to heritable diseases of immune dysregulation and autoimmunity. In this article, we review recent insights into Treg cell biology and function, with particular attention to lessons learned from newly recognized clinical disorders of Treg cell deficiency.
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Affiliation(s)
- Fayhan J Alroqi
- Division of Immunology, Boston Children's Hospital, Karp Family Building, Room 10-214. 1 Blackfan Street, Boston, MA, 02115, USA
| | - Talal A Chatila
- Division of Immunology, Boston Children's Hospital, Karp Family Building, Room 10-214. 1 Blackfan Street, Boston, MA, 02115, USA. .,Department of Pediatrics, Harvard Medical School, Boston, MA, USA.
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94
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In Vivo Expansion of Regulatory T Cells by Low-Dose Interleukin-2 Treatment Increases Allograft Survival in Corneal Transplantation. Transplantation 2016; 100:525-32. [PMID: 26881788 DOI: 10.1097/tp.0000000000001044] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
BACKGROUND Corneal allograft survival dramatically decreases in hosts with inflamed or vascularized recipient beds. We have previously shown that in rejected corneal allografts regulatory T cells (Treg) demonstrate diminished Foxp3 expression and immunoregulatory function. Treatment with low doses of IL-2 selectively expands Treg and has been proposed for the treatment of autoimmune diseases. In this study, we investigated the effect of low-dose IL-2 administration on Treg function and corneal allograft survival. METHODS Allogeneic corneal transplantation was performed on inflamed host beds. Low-dose systemic IL-2 was administered starting 3 days before grafting until 6 weeks after transplantation. Frequencies of Treg and their immunosuppressive function and antigen specificity were assessed using flow cytometry, in vitro proliferation assays, and adoptive transfer experiments. Frequencies of effector T cells (Teff) and graft infiltrating immune cells were measured at 2 weeks posttransplantation. Long-term allograft survival was evaluated for up to 9 weeks using Kaplan-Meier survival analysis. RESULTS Treatment with low-dose IL-2 significantly increased frequencies of CD4CD25Foxp3 Treg and their immunosuppressive function. It also suppressed alloimmune response as shown by the decreased CD4 IFNγ T cell frequencies and graft infiltration of CD45 and CD4 cells. Clinical evaluation of the grafts showed significant improvement in long-term corneal allograft survival in the IL-2 treated group compared with controls. CONCLUSIONS Our study is the first to report that treatment with low-dose IL-2 increases survival of corneal allografts. We propose that IL-2-mediated Treg expansion can be an effective tool to prevent alloimmunity and to improve long-term allograft survival in transplantation.
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95
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Bhaskaran N, Quigley C, Weinberg A, Huang A, Popkin D, Pandiyan P. Transforming growth factor-β1 sustains the survival of Foxp3(+) regulatory cells during late phase of oropharyngeal candidiasis infection. Mucosal Immunol 2016; 9:1015-26. [PMID: 26530137 PMCID: PMC4854793 DOI: 10.1038/mi.2015.115] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2015] [Accepted: 09/21/2015] [Indexed: 02/04/2023]
Abstract
As CD4(+)CD25(+)Foxp3(+) regulatory T cells (Tregs) play crucial immunomodulatory roles during infections, one key question is how these cells are controlled during antimicrobial immune responses. Mechanisms controlling their homeostasis are central to ensure efficient protection against pathogens, as well as to control infection-associated immunopathology. Here we studied how their viability is regulated in the context of mouse oropharyngeal candidiasis (OPC) infection, and found that these cells show increased protection from apoptosis during late phase of infection and reinfection. Tregs underwent reduced cell death because they are refractory to T cell receptor restimulation-induced cell death (RICD). We confirmed their resistance to RICD, using mouse and human Tregs in vitro, and by inducing α-CD3 antibody-mediated apoptosis in vivo. The enhanced viability is dependent on increased transforming growth factor-β1 (TGF-β1) signaling that results in upregulation of cFLIP (cellular FLICE (FADD-like IL-1β-converting enzyme)-inhibitory protein) in Tregs. Protection from cell death is abrogated in the absence of TGF-β1 signaling in Tregs during OPC infection. Taken together, our data unravel the previously unrecognized role of TGF-β1 in promoting Treg viability, coinciding with the pronounced immunomodulatory role of these cells during later phase of OPC infection, and possibly other mucosal infections.
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Affiliation(s)
- N Bhaskaran
- Department of Biological Sciences, School of Dental Medicine, Case Western Reserve University, Cleveland, Ohio, USA
| | - C Quigley
- Department of Biological Sciences, School of Dental Medicine, Case Western Reserve University, Cleveland, Ohio, USA
| | - A Weinberg
- Department of Biological Sciences, School of Dental Medicine, Case Western Reserve University, Cleveland, Ohio, USA
| | - A Huang
- Department of Pathology, School of Medicine, Case Western Reserve University, Cleveland, Ohio, USA
| | - D Popkin
- Department of Dermatology, School of Medicine, Case Western Reserve University, Cleveland, Ohio, USA
| | - P Pandiyan
- Department of Biological Sciences, School of Dental Medicine, Case Western Reserve University, Cleveland, Ohio, USA
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96
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Hu M, Wang YM, Wang Y, Zhang GY, Zheng G, Yi S, O'Connell PJ, Harris DCH, Alexander SI. Regulatory T cells in kidney disease and transplantation. Kidney Int 2016; 90:502-14. [PMID: 27263492 DOI: 10.1016/j.kint.2016.03.022] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2015] [Revised: 03/06/2016] [Accepted: 03/17/2016] [Indexed: 01/03/2023]
Abstract
Regulatory T cells (Tregs) have been shown to be important in maintaining immune homeostasis and preventing autoimmune disease, including autoimmune kidney disease. It is also likely that they play a role in limiting kidney transplant rejection and potentially in promoting transplant tolerance. Although other subsets of Tregs exist, the most potent and well-defined Tregs are the Foxp3 expressing CD4(+) Tregs derived from the thymus or generated peripherally. These CD4(+)Foxp3(+) Tregs limit autoimmune renal disease in animal models, especially chronic kidney disease, and kidney transplantation. Furthermore, other subsets of Tregs, including CD8 Tregs, may play a role in immunosuppression in kidney disease. The development and protective mechanisms of Tregs in kidney disease and kidney transplantation involve multiple mechanisms of suppression. Here we review the development and function of CD4(+)Foxp3(+) Tregs. We discuss the specific application of Tregs as a therapeutic strategy to prevent kidney disease and to limit kidney transplant rejection and detail clinical trials in this area of transplantation.
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Affiliation(s)
- Min Hu
- Centre for Transplantation and Renal Research, The Westmead Institute for Medical Research, University of Sydney, Westmead, New South Wales, Australia; Centre for Kidney Research, The Children's Hospital at Westmead, University of Sydney, Westmead, New South Wales, Australia
| | - Yuan Min Wang
- Centre for Kidney Research, The Children's Hospital at Westmead, University of Sydney, Westmead, New South Wales, Australia
| | - Yiping Wang
- Centre for Transplantation and Renal Research, The Westmead Institute for Medical Research, University of Sydney, Westmead, New South Wales, Australia
| | - Geoff Y Zhang
- Centre for Kidney Research, The Children's Hospital at Westmead, University of Sydney, Westmead, New South Wales, Australia
| | - Guoping Zheng
- Centre for Transplantation and Renal Research, The Westmead Institute for Medical Research, University of Sydney, Westmead, New South Wales, Australia
| | - Shounan Yi
- Centre for Transplantation and Renal Research, The Westmead Institute for Medical Research, University of Sydney, Westmead, New South Wales, Australia
| | - Philip J O'Connell
- Centre for Transplantation and Renal Research, The Westmead Institute for Medical Research, University of Sydney, Westmead, New South Wales, Australia
| | - David C H Harris
- Centre for Transplantation and Renal Research, The Westmead Institute for Medical Research, University of Sydney, Westmead, New South Wales, Australia
| | - Stephen I Alexander
- Centre for Kidney Research, The Children's Hospital at Westmead, University of Sydney, Westmead, New South Wales, Australia.
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97
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Goropevšek A, Holcar M, Avčin T. The Role of STAT Signaling Pathways in the Pathogenesis of Systemic Lupus Erythematosus. Clin Rev Allergy Immunol 2016; 52:164-181. [DOI: 10.1007/s12016-016-8550-y] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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98
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Talme T, Bergdahl E, Sundqvist KG. Methotrexate and its therapeutic antagonists caffeine and theophylline, target a motogenic T-cell mechanism driven by thrombospondin-1 (TSP-1). Eur J Immunol 2016; 46:1279-90. [DOI: 10.1002/eji.201546122] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2015] [Revised: 12/17/2015] [Accepted: 02/19/2016] [Indexed: 12/27/2022]
Affiliation(s)
- Toomas Talme
- Department of Medicine; Division of Dermatology; Karolinska Institute at Karolinska University Hospital; Stockholm Sweden
| | - Eva Bergdahl
- Department of Laboratory Medicine; Division of Clinical Immunology; Karolinska Institute at Karolinska University Hospital; Stockholm Sweden
| | - Karl-Gösta Sundqvist
- Department of Laboratory Medicine; Division of Clinical Immunology; Karolinska Institute at Karolinska University Hospital; Stockholm Sweden
- Department of Laboratory Medicine; Division of Therapeutic Immunology; Karolinska Institute at Karolinska University Hospital; Stockholm Sweden
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99
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Raker VK, Becker C, Steinbrink K. The cAMP Pathway as Therapeutic Target in Autoimmune and Inflammatory Diseases. Front Immunol 2016; 7:123. [PMID: 27065076 PMCID: PMC4814577 DOI: 10.3389/fimmu.2016.00123] [Citation(s) in RCA: 194] [Impact Index Per Article: 24.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2016] [Accepted: 03/18/2016] [Indexed: 12/26/2022] Open
Abstract
Nucleotide signaling molecules contribute to the regulation of cellular pathways. In the immune system, cyclic adenosine monophosphate (cAMP) is well established as a potent regulator of innate and adaptive immune cell functions. Therapeutic strategies to interrupt or enhance cAMP generation or effects have immunoregulatory potential in autoimmune and inflammatory disorders. Here, we provide an overview of the cyclic AMP axis and its role as a regulator of immune functions and discuss the clinical and translational relevance of interventions with these processes.
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Affiliation(s)
- Verena Katharina Raker
- Department of Dermatology, University Medical Center Mainz, Johannes Gutenberg-University Mainz , Mainz , Germany
| | - Christian Becker
- Department of Dermatology, University Medical Center Mainz, Johannes Gutenberg-University Mainz , Mainz , Germany
| | - Kerstin Steinbrink
- Department of Dermatology, University Medical Center Mainz, Johannes Gutenberg-University Mainz , Mainz , Germany
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100
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