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Chakrabarti R, Duddu S, Tiwari A, Naidu KT, Sharma P, Chakravorty N, Shukla PC. Natural Killer T cells and the invariant subset promote atherosclerosis: A meta-analysis. Life Sci 2023; 321:121620. [PMID: 37011534 DOI: 10.1016/j.lfs.2023.121620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Revised: 03/13/2023] [Accepted: 03/21/2023] [Indexed: 04/04/2023]
Abstract
AIMS Natural Killer T (NKT) cells are reported to be both pro- and anti-atherosclerotic. With this meta-analysis, we evaluated the NKT population and their subsets in regulating the atherosclerotic disease in mice. MAIN METHODS Eighteen pre-clinical (mice, n = 1276) and 6 clinical observational studies (humans, n = 116) met the eligibility criteria for inclusion. Random effects model was used and standard mean difference (SMD) was calculated for the cell counts and aortic lesion area. KEY FINDINGS Lesion area decreased in the absence of whole NKT cell population (-1.33[95%CI, -2.14, -0.52]), and in the absence of only iNKT subset (-0.66[95%CI, -1.69, 0.37]). However, lesion area increased after over-expression/activation of iNKTs (1.40[95%CI, 0.28, 2.52]). Atherogenic diet (AD) or high fat diet (HFD) increased the number of NKT cells (2.51[95%CI, 1.42, 3.61]), whereas the iNKT cell numbers and iNKT cell-specific gene expression decreased in mice (-2.04[95%CI, -3.34, -0.75]) and atherosclerotic patients (-1.81[95 % CI, -2.89, -0.74]). SIGNIFICANCE Here we show that, NKT and iNKT cells promote atherosclerosis. In general, NKT cell population increases with the progression of the plaque in mice and the numbers of iNKT cells reduce once the disease is established both in mice and humans.
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Functional Role of B Cells in Atherosclerosis. Cells 2021; 10:cells10020270. [PMID: 33572939 PMCID: PMC7911276 DOI: 10.3390/cells10020270] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Revised: 01/24/2021] [Accepted: 01/26/2021] [Indexed: 12/30/2022] Open
Abstract
Atherosclerosis is a lipid-driven inflammatory disease of blood vessels, and both innate and adaptive immune responses are involved in its development. The impact of B cells on atherosclerosis has been demonstrated in numerous studies and B cells have been found in close proximity to atherosclerotic plaques in humans and mice. B cells exert both atheroprotective and pro-atherogenic functions, which have been associated with their B cell subset attribution. While B1 cells and marginal zone B cells are considered to protect against atherosclerosis, follicular B cells and innate response activator B cells have been shown to promote atherosclerosis. In this review, we shed light on the role of B cells from a different, functional perspective and focus on the three major B cell functions: antibody production, antigen presentation/T cell interaction, and the release of cytokines. All of these functions have the potential to affect atherosclerosis by multiple ways and are dependent on the cellular milieu and the activation status of the B cell. Moreover, we discuss B cell receptor signaling and the mechanism of B cell activation under atherosclerosis-prone conditions. By summarizing current knowledge of B cells in and beyond atherosclerosis, we are pointing out open questions and enabling new perspectives.
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Bagley J, Williams L, Hyde M, Birriel CR, Iacomini J. Hyperlipidemia and Allograft Rejection. CURRENT TRANSPLANTATION REPORTS 2019; 6:90-98. [PMID: 31934529 DOI: 10.1007/s40472-019-0232-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Purpose of review Advances in the development of immunosuppressive drug regimens have led to impressive survival rates in the year following organ transplantation. However rates of long-term graft dysfunction remain undesirably high. Recently it has been shown that co-morbidities in the patient population may affect graft survival. In mouse models, hyperlipidemia, a co-morbidity present in the majority of cardiac transplant patients, can significantly alter T cell responses to cardiac and skin allografts, and accelerate graft rejection. Here we review recent advances in our understanding of how alterations in lipids affect immune function and graft survival. Recent Findings Recent work in humans has highlighted the importance of controlling low density lipoprotein (LDL) levels in transplant recipients to reduce the development of chronic allograft vasculopathy (CAV). High serum levels of cholesterol containing particles leads to extensive immune system changes to T cell proliferation, differentiation and suppression. Changes in B cell subsets, and the ability of antigen presenting cells to stimulate T cells in hyperlipidemic animals may also contribute to increased organ allograft rejection. Summary Cholesterol metabolism is a critical cellular pathway for proper control of immune cell homeostasis and activation. Increasing evidence in both human, and in mouse models shows that elevated levels of serum cholesterol can have profound impact on the immune system. Hyperlipidemia has been shown to increase T cell activation, alter the development of T helper subsets, increase the inflammatory capacity of antigen presenting cells (APC) and significantly accelerate graft rejection in several models.
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Affiliation(s)
- Jessamyn Bagley
- Tufts University School of Medicine, Department of Immunology, Sackler School of Biomedical Sciences Programs in Immunology and Genetics, Boston, MA 02111 USA
| | - Linus Williams
- Tufts University School of Medicine, Department of Immunology, Sackler School of Biomedical Sciences Programs in Immunology and Genetics, Boston, MA 02111 USA
| | - Michael Hyde
- Tufts University School of Medicine, Department of Immunology, Sackler School of Biomedical Sciences Programs in Immunology and Genetics, Boston, MA 02111 USA
| | - Christian Rosa Birriel
- Tufts University School of Medicine, Department of Immunology, Sackler School of Biomedical Sciences Programs in Immunology and Genetics, Boston, MA 02111 USA
| | - John Iacomini
- Tufts University School of Medicine, Department of Immunology, Sackler School of Biomedical Sciences Programs in Immunology and Genetics, Boston, MA 02111 USA
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Nus M, Tsiantoulas D, Mallat Z. Plan B (-cell) in atherosclerosis. Eur J Pharmacol 2017; 816:76-81. [PMID: 28882560 DOI: 10.1016/j.ejphar.2017.09.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2017] [Revised: 08/31/2017] [Accepted: 09/01/2017] [Indexed: 11/18/2022]
Abstract
Atherosclerosis is a leading cause of death worldwide. It is a complex chronic inflammatory disease involving interactions between vascular, circulating and immune cells. B cells play an important role in chronic inflammation producing antibodies and regulating T and natural killer (NKT) cell activation. The role of B cells in atherosclerosis is complex, with atherogenic and protective roles assigned for distinct B cell subsets. Drugs that deplete B cells or modulate their functions are now used in the treatment of various autoimmune diseases in humans. Here, we briefly review the roles of B cell subsets in atherogenesis, and emphasize the potential impact of B cell targeted therapies on the cardiovascular risk of treated patients. Developing more B cell subset-specific therapies would lead to more effective treatments with enhanced safety profile.
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Affiliation(s)
- Meritxell Nus
- Department of Medicine, Division of Cardiovascular Medicine, University of Cambridge, Cambridge, UK
| | - Dimitrios Tsiantoulas
- Department of Medicine, Division of Cardiovascular Medicine, University of Cambridge, Cambridge, UK
| | - Ziad Mallat
- Department of Medicine, Division of Cardiovascular Medicine, University of Cambridge, Cambridge, UK; Institut National de la Santé et de la Recherche Médicale, U970 Paris, France.
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van Puijvelde GH, Kuiper J. NKT cells in cardiovascular diseases. Eur J Pharmacol 2017; 816:47-57. [DOI: 10.1016/j.ejphar.2017.03.052] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2016] [Revised: 03/10/2017] [Accepted: 03/23/2017] [Indexed: 12/17/2022]
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Kyaw T, Peter K, Li Y, Tipping P, Toh BH, Bobik A. Cytotoxic lymphocytes and atherosclerosis: significance, mechanisms and therapeutic challenges. Br J Pharmacol 2017; 174:3956-3972. [PMID: 28471481 DOI: 10.1111/bph.13845] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2016] [Revised: 04/02/2017] [Accepted: 04/24/2017] [Indexed: 02/06/2023] Open
Abstract
Cytotoxic lymphocytes encompass natural killer lymphocytes (cells) and cytotoxic T cells that include CD8+ T cells, natural killer (NK) T cells, γ, δ (γδ)-T cells and human CD4 + CD28- T cells. These cells play critical roles in inflammatory diseases and in controlling cancers and infections. Cytotoxic lymphocytes can be activated via a number of mechanisms that may involve dendritic cells, macrophages, cytokines or surface proteins on stressed cells. Upon activation, they secrete pro-inflammatory cytokines as well as anti-inflammatory cytokines, chemokines and cytotoxins to promote inflammation and the development of atherosclerotic lesions including vulnerable lesions, which are strongly implicated in myocardial infarctions and strokes. Here, we review the mechanisms that activate and regulate cytotoxic lymphocyte activity, including activating and inhibitory receptors, cytokines, chemokine receptors-chemokine systems utilized to home to inflamed lesions and cytotoxins and cytokines through which they affect other cells within lesions. We also examine their roles in human and mouse models of atherosclerosis and the mechanisms by which they exert their pathogenic effects. Finally, we discuss strategies for therapeutically targeting these cells to prevent the development of atherosclerotic lesions and vulnerable plaques and the challenge of developing highly targeted therapies that only minimally affect the body's immune system, avoiding the complications, such as increased susceptibility to infections, which are currently associated with many immunotherapies for autoimmune diseases. LINKED ARTICLES This article is part of a themed section on Targeting Inflammation to Reduce Cardiovascular Disease Risk. To view the other articles in this section visit http://onlinelibrary.wiley.com/doi/10.1111/bph.v174.22/issuetoc and http://onlinelibrary.wiley.com/doi/10.1111/bcp.v82.4/issuetoc.
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Affiliation(s)
- Tin Kyaw
- Baker Heart and Diabetes Institute, Melbourne, Vic, Australia.,Department of Medicine, Monash University, Melbourne, Vic, Australia
| | - Karlheinz Peter
- Baker Heart and Diabetes Institute, Melbourne, Vic, Australia.,Department of Immunology, Monash University, Melbourne, Vic, Australia
| | - Yi Li
- Baker Heart and Diabetes Institute, Melbourne, Vic, Australia.,Department of Medicine, Monash University, Melbourne, Vic, Australia
| | - Peter Tipping
- Department of Medicine, Monash University, Melbourne, Vic, Australia
| | - Ban-Hock Toh
- Baker Heart and Diabetes Institute, Melbourne, Vic, Australia.,Department of Medicine, Monash University, Melbourne, Vic, Australia
| | - Alex Bobik
- Baker Heart and Diabetes Institute, Melbourne, Vic, Australia.,Department of Immunology, Monash University, Melbourne, Vic, Australia.,Department of Medicine, Monash University, Melbourne, Vic, Australia
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Grönberg C, Nilsson J, Wigren M. Recent advances on CD4 + T cells in atherosclerosis and its implications for therapy. Eur J Pharmacol 2017; 816:58-66. [PMID: 28457923 DOI: 10.1016/j.ejphar.2017.04.029] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Revised: 03/13/2017] [Accepted: 04/20/2017] [Indexed: 12/19/2022]
Abstract
Atherosclerosis is an arterial inflammatory disease and the primary cause of cardiovascular disease. T helper (Th) cells are an important part in atherosclerotic plaque as they can be either disease promoting or protective. A body of evidence points to a pro-atherosclerotic role of Th1 cells, whereas the role of Th2, Th17 and iNKT cells seems more complex and dependent on surrounding factors, including the developmental stage of the disease. Opposed to Th1 cells, there is convincing support for an anti-atherogenic role of Tregs. Recent data identify the plasticity of Th cells as an important challenge in understanding the functional role of different Th cell subsets in atherosclerosis. Much of the knowledge of Th cell function in atherosclerosis is based on findings from experimental models and translating this into human disease is challenging. Targeting Th cells and/or their specific cytokines represents an attractive option for future therapy against atherosclerosis, although the benefits and the risk of modulation of Th cells with these novel drug targets must first be carefully assessed.
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Affiliation(s)
| | - Jan Nilsson
- Department of Clinical Sciences Malmö, Lund University, Sweden
| | - Maria Wigren
- Department of Clinical Sciences Malmö, Lund University, Sweden.
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Nus M, Sage AP, Lu Y, Masters L, Lam BYH, Newland S, Weller S, Tsiantoulas D, Raffort J, Marcus D, Finigan A, Kitt L, Figg N, Schirmbeck R, Kneilling M, Yeo GSH, Binder CJ, de la Pompa JL, Mallat Z. Marginal zone B cells control the response of follicular helper T cells to a high-cholesterol diet. Nat Med 2017; 23:601-610. [DOI: 10.1038/nm.4315] [Citation(s) in RCA: 84] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2016] [Accepted: 03/06/2017] [Indexed: 12/12/2022]
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