1
|
Akyol S, Akgun MY, Yetmez M, Hanci M, Oktar FN, Ben-Nissan B. Comparative Analysis of NF-κB in the MyD88-Mediated Pathway After Implantation of Titanium Alloy and Stainless Steel and the Role of Regulatory T Cells. World Neurosurg 2020; 144:e138-e148. [PMID: 32781150 DOI: 10.1016/j.wneu.2020.08.016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Accepted: 08/03/2020] [Indexed: 11/18/2022]
Abstract
OBJECTIVE Development of immunologically smart implants, integrated to biological systems, is a key aim to minimize the inflammatory response of the host to biomaterial implants. METHODS The aim of this study is to investigate the influence of titanium alloy and stainless steel implants on immunological responses in rats by comparative analysis of nuclear factor kappa B (NF-κB) profiles in the activation of inflammatory signaling pathways and the role of CD4+CD25+Foxp3+. RESULTS Both Ti alloy and stainless steel alloy group implantation affect Toll-like receptors-4 pathways and CD4+CD25+ regulatory T cells in different ways. CONCLUSIONS Results show that NF-κB/p65 and NF-κB1/p50 possess potential as a therapeutic target in the prevention of adverse reactions to metal, especially for controlling inflammation after the implantation.
Collapse
Affiliation(s)
- Sibel Akyol
- Department of Physiology, Istanbul University-Cerrahpasa, Istanbul, Turkey; Faculty of Science, School of Life Sciences, University of Technology Sydney, Sydney, Australia
| | - Mehmet Yigit Akgun
- Department of Neurosurgery, High Specialized Hospital, Kirikkale, Turkey.
| | - Mehmet Yetmez
- Department of Mechanical Engineering, Faculty of Engineering, Zonguldak Bulent Ecevit University, Zonguldak, Turkey
| | - Murat Hanci
- Department of Neurosurgery, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Faik Nuzhet Oktar
- Faculty of Technology, Advanced Nanomaterials Research Laboratory, Marmara University, Istanbul, Turkey
| | - Besim Ben-Nissan
- Faculty of Science, School of Life Sciences, University of Technology Sydney, Sydney, Australia
| |
Collapse
|
2
|
Uehara M, McGrath MM, Ohori S, Solhjou Z, Banouni N, Routray S, Evans C, DiNitto JP, Elkhal A, Turka LA, Strom TB, Tullius SG, Winkler DG, Azzi J, Abdi R. Regulation of T cell alloimmunity by PI3Kγ and PI3Kδ. Nat Commun 2017; 8:951. [PMID: 29038423 PMCID: PMC5643371 DOI: 10.1038/s41467-017-00982-x] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2016] [Accepted: 08/10/2017] [Indexed: 01/04/2023] Open
Abstract
Phosphatidylinositol-3-kinases (PI3K) γ and δ are preferentially enriched in leukocytes, and defects in these signaling pathways have been shown to impair T cell activation. The effects of PI3Kγ and PI3Kδ on alloimmunity remain underexplored. Here, we show that both PI3Kγ−/− and PI3KδD910A/D910A mice receiving heart allografts have suppression of alloreactive T effector cells and delayed acute rejection. However, PI3Kδ mutation also dampens regulatory T cells (Treg). After treatment with low dose CTLA4-Ig, PI3Kγ−/−, but not PI3ΚδD910A/D910A, recipients exhibit indefinite prolongation of heart allograft survival. PI3KδD910A/D910A Tregs have increased apoptosis and impaired survival. Selective inhibition of PI3Kγ and PI3Kδ (using PI3Kδ and dual PI3Kγδ chemical inhibitors) shows that PI3Kγ inhibition compensates for the negative effect of PI3Kδ inhibition on long-term allograft survival. These data serve as a basis for future PI3K-based immune therapies for transplantation. Phosphatidylinositol-3-kinases (PI3K) γ and δ are key regulators of T cell signaling. Here the author show, using mouse heart allograft transplantation models, that PI3Kγ or PI3Kδ deficiency prolongs graft survival, but selective inhibition of PI3Kγ or PI3Kδ reveals alternative transplant survival outcomes post CTLA4-Ig treatment.
Collapse
Affiliation(s)
- Mayuko Uehara
- Transplantation Research Center, Renal Division, Brigham and Women's Hospital and Harvard Medical School, 221 Longwood Avenue, Boston, MA, 02115, USA
| | - Martina M McGrath
- Transplantation Research Center, Renal Division, Brigham and Women's Hospital and Harvard Medical School, 221 Longwood Avenue, Boston, MA, 02115, USA
| | - Shunsuke Ohori
- Transplantation Research Center, Renal Division, Brigham and Women's Hospital and Harvard Medical School, 221 Longwood Avenue, Boston, MA, 02115, USA
| | - Zhabiz Solhjou
- Transplantation Research Center, Renal Division, Brigham and Women's Hospital and Harvard Medical School, 221 Longwood Avenue, Boston, MA, 02115, USA
| | - Naima Banouni
- Transplantation Research Center, Renal Division, Brigham and Women's Hospital and Harvard Medical School, 221 Longwood Avenue, Boston, MA, 02115, USA
| | - Sujit Routray
- Transplantation Research Center, Renal Division, Brigham and Women's Hospital and Harvard Medical School, 221 Longwood Avenue, Boston, MA, 02115, USA
| | - Catherine Evans
- Infinity Pharmaceuticals, Inc 784 Memorial Drive, Cambridge, MA, 02139, USA
| | - Jonathan P DiNitto
- Infinity Pharmaceuticals, Inc 784 Memorial Drive, Cambridge, MA, 02139, USA
| | - Abdallah Elkhal
- Division of Transplant Surgery and Transplant Surgery Research Laboratory, Brigham and Women's Hospital and Harvard Medical School, 75 Francis Street, Boston, MA, 02115, USA
| | - Laurence A Turka
- Center for Transplantation Sciences, Massachusetts General Hospital/Harvard Medical School, Massachusetts Massachusetts General Hospital-East Charlestown Navy Yard Building 149, 13th Street, Charlestown, MA, 02129-2020, USA
| | - Terry B Strom
- The Transplant Institute, Beth Israel Deaconess Medical Center/Harvard Medical School, 330 Brookline Avenue, E/CLS Room 607, Boston, MA, 02215, USA
| | - Stefan G Tullius
- Division of Transplant Surgery and Transplant Surgery Research Laboratory, Brigham and Women's Hospital and Harvard Medical School, 75 Francis Street, Boston, MA, 02115, USA
| | - David G Winkler
- Infinity Pharmaceuticals, Inc 784 Memorial Drive, Cambridge, MA, 02139, USA
| | - Jamil Azzi
- Transplantation Research Center, Renal Division, Brigham and Women's Hospital and Harvard Medical School, 221 Longwood Avenue, Boston, MA, 02115, USA
| | - Reza Abdi
- Transplantation Research Center, Renal Division, Brigham and Women's Hospital and Harvard Medical School, 221 Longwood Avenue, Boston, MA, 02115, USA.
| |
Collapse
|
3
|
|
4
|
Liu G, Zhang L, Zhao Y. Modulation of immune responses through direct activation of Toll-like receptors to T cells. Clin Exp Immunol 2010; 160:168-75. [PMID: 20128825 DOI: 10.1111/j.1365-2249.2010.04091.x] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
Toll-like receptors (TLRs), which are a family of pattern recognition receptors (PRRs), are involved critically in the generation and regulation of innate immunity as well as initiation of subsequent adaptive immune responses. However, recent research results showed that different subsets of T cells express certain types of TLRs during development and activation stages. Importantly, TLRs participate in the direct regulation of adaptive immune response, possibly as co-stimulatory molecules. In this review we summarize recent studies about the novel regulation of TLRs on the homeostasis and immunity of different T cell subtypes including CD4+CD25+T regulatory cells (Treg) and interleukin (IL)-17-producing CD4+T cells (T helper type 17). The direct involvement of TLRs in T cell-mediated immunity prompted us to reconsider the role of TLRs in the occurrence of autoimmune diseases, infectious diseases and graft rejection. The important effects of TLRs in T cell-intrinsic components also prompt us to explore novel vaccine adjuvants for modifying desired immune responses in an efficient way.
Collapse
Affiliation(s)
- G Liu
- Transplantation Biology Research Division, State Key Laboratory of Biomembrane and Membrane Biotechnology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | | | | |
Collapse
|
5
|
A selective phosphodiesterase 4 (PDE4) inhibitor Zl-n-91 suppresses IL-17 production by human memory Th17 cells. Int Immunopharmacol 2008; 8:1408-17. [PMID: 18687303 DOI: 10.1016/j.intimp.2008.05.012] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2008] [Revised: 05/20/2008] [Accepted: 05/26/2008] [Indexed: 11/21/2022]
Abstract
Th17 cells are highly proinflammatory and involved in the immunopathogenesis of severe autoimmune diseases. Selective phosphodiesterase 4 (PDE4) inhibitors, which elevate intracellular cAMP by inhibiting the hydrolysis of cAMP, have been demonstrated to be an effective anti-inflammatory agent in airway inflammatory diseases. In the present study, we assessed the effect of a selective PDE4 inhibitor Zl-n-91 on IL-17 production by PBMCs and by purified CD4(+) T cells following stimulation. The results for the first time demonstrated that the addition of Zl-n-91 into cell cultures of PBMCs and purified CD4(+) T cells could result in the suppression of IL-17 production at the protein and mRNA levels. Further analysis indicated that Zl-n-91 had a direct inhibitory effect on the IL-17 production by memory Th17 cells via the suppression of activation, proliferation and division of CD4(+) T cells. Our data suggested that Zl-n-91 might have beneficial effects in the treatment of IL-17-related autoimmune diseases.
Collapse
|
6
|
Liu G, Zhao Y. Toll-like receptors and immune regulation: their direct and indirect modulation on regulatory CD4+ CD25+ T cells. Immunology 2007; 122:149-56. [PMID: 17848162 PMCID: PMC2266004 DOI: 10.1111/j.1365-2567.2007.02651.x] [Citation(s) in RCA: 120] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
Regulatory CD4(+) CD25(+) T (Treg) cells with the ability to suppress host immune responses against self- or non-self antigens play important roles in the processes of autoimmunity, transplant rejection, infectious diseases and cancers. The proper regulation of CD4(+) CD25(+) Treg cells is thus critical for optimal immune responses. Toll-like receptor (TLR)-mediated recognition of specific structures of invading pathogens initiates innate as well as adaptive immune responses via antigen-presenting cells (APCs). Interestingly, new evidence suggests that TLR signalling may directly or indirectly regulate the immunosuppressive function of CD4(+) CD25(+) Treg cells in immune responses. TLR signalling may shift the balance between CD4(+) T-helper cells and Treg cells, and subsequently influence the outcome of the immune response. This immunomodulation pathway may therefore have potential applications in the treatment of graft rejection, autoimmune diseases, infection diseases and cancers.
Collapse
Affiliation(s)
- Guangwei Liu
- Transplantation Biology Research Division, State Key Laboratory of Biomembrane and Membrane Biotechnology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | | |
Collapse
|
7
|
Huang Y, Yin H, Han J, Huang B, Xu J, Zheng F, Tan Z, Fang M, Rui L, Chen D, Wang S, Zheng X, Wang CY, Gong F. Extracellular hmgb1 functions as an innate immune-mediator implicated in murine cardiac allograft acute rejection. Am J Transplant 2007; 7:799-808. [PMID: 17331117 DOI: 10.1111/j.1600-6143.2007.01734.x] [Citation(s) in RCA: 112] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Hmgb1, an evolutionarily conserved chromosomal protein, was recently re-discovered to be an innate immune-mediator contributing to both innate and adaptive immune responses. Here, we show a pivotal role for Hmgb1 in acute allograft rejection in a murine cardiac transplantation model. Extracellular Hmgb1 was found to be a potent stimulator for adaptive immune responses. Hmgb1 can be either passively released from damaged cells after organ harvest and ischemia/reperfusion insults, or actively secreted by allograft infiltrated immune cells. After transplantation, allografts show a significant temporal up-regulation of Hmgb1 expression accompanied by inflammatory infiltration, a consequence of graft destruction. These data suggest the involvement of Hmgb1 in acute allograft rejection. In line with these observations, treatment of recipients with rA-box, a specific blockade for endogenous Hmgb1, significantly prolonged cardiac allograft survival as compared to those recipients treated with either rGST or control vehicle. The enhanced graft survival is associated with reduced allograft expression of TNFalpha, IFNgamma and Hmgb1 and impaired Th1 immune response.
Collapse
Affiliation(s)
- Y Huang
- Laboratory of Transplantation, Department of Immunology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
8
|
Abstract
The T help 1 (Th1) and Th2 cell classification have provided the framework for understanding CD4(+) T cell biology and the interplay between innate and adaptive immunity for almost two decades. Recent studies have defined a previously unknown arm of the CD4(+) T cell effector response, the Th17 lineage, which promises to change our understanding of immune regulation, immune pathogenesis and host defense. The factors that specify differentiation of IL-17 producing effector T cells from naïve T cell precursors are being rapidly discovered and are providing insights into mechanisms by which signals from cells of the innate immune system guide alternative pathways of Th1, Th2, or Th17 development. In this review, we will focus on recent studies that have identified new subsets of Th cells, new insights regarding the induced generation and differentiation mechanisms of Th17 cells and immune regulatory effects.
Collapse
Affiliation(s)
- Yujing Bi
- State Key laboratory of Pathogen and Biosecurity, National Center for Biomedical Analysis, Army Center for Microbial Detection and Research, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences (AMMS), Beijing, China
| | | | | |
Collapse
|
9
|
Liu GW, Ma HX, Wu Y, Zhao Y. The nonopsonic allogeneic cell phagocytosis of macrophages detected by flow cytometry and two photon fluorescence microscope. Transpl Immunol 2006; 16:220-6. [PMID: 17138057 DOI: 10.1016/j.trim.2006.09.023] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2006] [Revised: 08/21/2006] [Accepted: 09/08/2006] [Indexed: 10/24/2022]
Abstract
Phagocytosis, one of the apparent functions for macrophages, represents an early and crucial event in triggering host defenses against invading pathogens as well as allo- or xenogeneic rejection. Now, some methods have been used in detecting the opsonic phagocytosis of macrophages in xenogeneic settings. Efficient nonopsonic phagocytosis analysis method has not been established yet. In the present studies, allogeneic lymphocytes pre-labeled with 5-(and-6)-carboxyfluorescein diacetate succinimidyl ester (CFSE) or derived from green fluorescent protein transgeneic B6 mice (GFP-B6 mice) were co-incubated with primary murine peritoneal macrophages (PEMs) for 1-2 h or were injected into murine peritoneal cavity for 30 to 240 min. Assays by flow cytometry (FCM) and two photon laser scanning microscope (TPM) showed an efficient uptake of both allogeneic lymphocytes and xenogeneic chicken red blood cells. The continuing process of nonopsonic phagocytosis of allogeneic lymphocytes by PEMs was recorded by TPM. Furthermore, the phenotype differences of PEMs with or without phagocytosis of allogeneic cells were determined by three-color FCMs. Significantly upregulated expressions of CD11b, CD44, TLR2 and TLR4 on PEMs were observed as early as 6 h after phagocytosis of allogeneic cells. Our present data indicated that the FCM and TPM combined method is a practical approach to detect macrophage nonopsonic phagocytosis of allogeneic lymphocytes and to identify the phenotype alteration of macrophages after phagocytosis.
Collapse
Affiliation(s)
- Guang-Wei Liu
- Transplantation Biology Research Division, State Key Laboratory of Biomembrane and Membrane Biotechnology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | | | | | | |
Collapse
|
10
|
Liu G, Xia XP, Gong SL, Zhao Y. The macrophage heterogeneity: difference between mouse peritoneal exudate and splenic F4/80+ macrophages. J Cell Physiol 2006; 209:341-52. [PMID: 16883572 DOI: 10.1002/jcp.20732] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Macrophages isolated from various tissues manifest differences in cell shape, the expression of surface markers, as well as metabolic and functional activities. However, the heterogeneity of macrophages expressing the same marker in different tissues has not been fully addressed. In the present study, mouse F4/80+ peritoneal exudate macrophages (PEMs) and splenic macrophages (SPMs) appeared similar in most respects. But the percentages of cells expressing CD80, CD40, MHC-II, TLR2, or TLR4, but not CD11c, CD54, or CD23, in freshly isolated F4/80+ SPMs were significantly higher than those in PEMs, whereas the levels of CD86+ cells in F4/80+ SPMs were markedly lower than those in PEMs. After lipopolysaccharide (LPS) stimulation, F4/80+ SPMs expressed significantly higher levels of CD86, CD40, or MHC-II than F4/80+ PEMs, but not CD11c, CD80, CD54, or CD23. F4/80+ SPMs had remarkably lower non-opsonic phagocytotic capacity against chicken RBCs or allo-T cells than PEMs as determined by two-photon microscopes and flow cytometry. SPMs produced markedly more NO than PEMs when cultured with LPS or allo-T cells. Furthermore, SPMs exhibited stronger immunogenicity than PEMs, as determined by the ability to stimulate T cell proliferation, delayed type hypersensitivity, and IFN-gamma production. The data showed the differences between SPMs and PEMs with regard to the phenotypes, phagocytosis, and immunogenicity, which may offer important information for us to better understand the distinguished immune responses of macrophages in spleens and the peritoneal cavity.
Collapse
Affiliation(s)
- Guangwei Liu
- Transplantation Biology Research Division, State Key Laboratory of Biomembrane and Membrane Biotechnology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | | | | | | |
Collapse
|