1
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D’Silva NJ, Pandiyan P. Neuroimmune cell interactions and chronic infections in oral cancers. Front Med (Lausanne) 2024; 11:1432398. [PMID: 39050547 PMCID: PMC11266022 DOI: 10.3389/fmed.2024.1432398] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2024] [Accepted: 06/18/2024] [Indexed: 07/27/2024] Open
Abstract
Inflammation is a process that is associated with the activation of distal immunosuppressive pathways that have evolved to restore homeostasis and prevent excessive tissue destruction. However, long-term immunosuppression resulting from systemic and local inflammation that may stem from dysbiosis, infections, or aging poses a higher risk for cancers. Cancer incidence and progression dramatically increase with chronic infections including HIV infection. Thus, studies on pro-tumorigenic effects of microbial stimulants from resident microbiota and infections in the context of inflammation are needed and underway. Here, we discuss chronic infections and potential neuro-immune interactions that could establish immunomodulatory programs permissive for tumor growth and progression.
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Affiliation(s)
- Nisha J. D’Silva
- Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, MI, United States
- Department of Pathology, Medical School, University of Michigan, Ann Arbor, MI, United States
- Rogel Cancer Center, University of Michigan, Ann Arbor, MI, United States
| | - Pushpa Pandiyan
- Department of Biological Sciences, School of Dental Medicine, Case Western Reserve University, Cleveland, OH, United States
- Department of Pathology, Case Western Reserve University, Cleveland, OH, United States
- Center for AIDS Research, Case Western Reserve University, Cleveland, OH, United States
- Case Comprehensive Cancer Center, School of Medicine, Case Western Reserve University, Cleveland, OH, United States
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2
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Shive C, Pandiyan P. Inflammation, Immune Senescence, and Dysregulated Immune Regulation in the Elderly. FRONTIERS IN AGING 2022; 3:840827. [PMID: 35821823 PMCID: PMC9261323 DOI: 10.3389/fragi.2022.840827] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Accepted: 03/30/2022] [Indexed: 12/22/2022]
Abstract
An optimal immune response requires the appropriate interaction between the innate and the adaptive arms of the immune system as well as a proper balance of activation and regulation. After decades of life, the aging immune system is continuously exposed to immune stressors and inflammatory assaults that lead to immune senescence. In this review, we will discuss inflammaging in the elderly, specifically concentrating on IL-6 and IL-1b in the context of T lymphocytes, and how inflammation is related to mortality and morbidities, specifically cardiovascular disease and cancer. Although a number of studies suggests that the anti-inflammatory cytokine TGF-b is elevated in the elderly, heightened inflammation persists. Thus, the regulation of the immune response and the ability to return the immune system to homeostasis is also important. Therefore, we will discuss cellular alterations in aging, concentrating on senescent T cells and CD4+ CD25+ FOXP3+ regulatory T cells (Tregs) in aging
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Affiliation(s)
- Carey Shive
- Louis Stokes Cleveland VA Medical Center, United States Department of Veterans Affairs, Cleveland, OH, United States.,Case Western Reserve University, Cleveland, OH, United States
| | - Pushpa Pandiyan
- Case Western Reserve University, Cleveland, OH, United States
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3
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Insua Pereira E, Sampaio AP, Lira M. Effects of contact lens wear on tear inflammatory biomarkers. Cont Lens Anterior Eye 2022; 45:101600. [DOI: 10.1016/j.clae.2022.101600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 04/13/2022] [Accepted: 04/15/2022] [Indexed: 11/25/2022]
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4
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He S, Xue M, Cai G. IL-6 alters migration capacity of CD4 +Foxp3 + regulatory T cells in systemic lupus erythematosus. Scand J Immunol 2021; 94:e13099. [PMID: 34940981 DOI: 10.1111/sji.13099] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Revised: 08/16/2021] [Accepted: 08/24/2021] [Indexed: 01/09/2023]
Abstract
Regulatory T cells (Tregs) are impaired in human systemic lupus erythematosus (SLE) and involved in disease pathogenesis. However, the mechanisms responsible for the Treg dysfunction in SLE remain unclear. In this study, we aimed to investigate the chemotaxis of Treg response to inflammatory stimulation. Sixty two patients were enrolled, and chemokine receptors, including CCR4, CCR5, CCR6, CCR8 and CXCR3 on CD4+Foxp3+Tregs and non-Treg CD4 T cells, were analysed using FACS. The expression of CCR4 and CCR6 on Tregs of SLE patients decreased, while the expression of CCR4 on non-Treg CD4 T cells increased, as compared with those of age- and sex-matched healthy donors. In parallel, in SLE, the chemotactic capacity of non-Treg CD4 T cells response to CCR4 and CCR6 ligands dramatically increased, while that of Tregs significantly decreased. Moreover, we found that cytokines IL-6 and IL-10 positively and negatively modulate the expression of those receptors respectively. IL-6, the significantly increased cytokine in active SLE, dramatically elevated CCR4 and CCR6 expression on non-Treg CD4 T cells. However, as for Tregs, these cells produced more IL-10 than non-Treg CD4 T cells upon IL-6 stimulation, and these IL-10 led to the inhibition of CCR4 and CCR6. In sum, our data provided new evidence suggesting a functional deficiency of Tregs in SLE. It may suggest that those dysfunctional Tregs have less access to the inflammation locus to exert inhibitory capacity.
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Affiliation(s)
- SiWei He
- Department of Laboratory Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - MingHui Xue
- Department of Laboratory Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Gang Cai
- Department of Laboratory Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
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5
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Pandiyan P, McCormick TS. Regulation of IL-17A-Producing Cells in Skin Inflammatory Disorders. J Invest Dermatol 2021; 142:867-875. [PMID: 34561088 DOI: 10.1016/j.jid.2021.06.036] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2021] [Revised: 06/09/2021] [Accepted: 06/22/2021] [Indexed: 12/11/2022]
Abstract
This review focuses on the IL-17A family of cytokines produced by T lymphocytes and other immune cells and how they are involved in cutaneous pathogenic responses. It will also discuss cutaneous dysbiosis and FOXP3+ regulatory T cells in the context of inflammatory conditions linked to IL-17 responses in the skin. Specifically, it will review key literature on chronic mucocutaneous candidiasis and psoriasis.
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Affiliation(s)
- Pushpa Pandiyan
- Department of Biological Sciences, School of Dental Medicine, Case Western Reserve University, Cleveland, Ohio, USA; Department of Pathology, School of Medicine, Case Western Reserve University, Cleveland, Ohio, USA.
| | - Thomas S McCormick
- Department of Dermatology, School of Medicine, Case Western Reserve University, Cleveland, Ohio, USA
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6
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Bhaskaran N, Schneider E, Faddoul F, Paes da Silva A, Asaad R, Talla A, Greenspan N, Levine AD, McDonald D, Karn J, Lederman MM, Pandiyan P. Oral immune dysfunction is associated with the expansion of FOXP3 +PD-1 +Amphiregulin + T cells during HIV infection. Nat Commun 2021; 12:5143. [PMID: 34446704 PMCID: PMC8390677 DOI: 10.1038/s41467-021-25340-w] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Accepted: 08/03/2021] [Indexed: 02/07/2023] Open
Abstract
Residual systemic inflammation and mucosal immune dysfunction persist in people living with HIV, despite treatment with combined anti-retroviral therapy, but the underlying immune mechanisms are poorly understood. Here we report that the altered immune landscape of the oral mucosa of HIV-positive patients on therapy involves increased TLR and inflammasome signaling, localized CD4+ T cell hyperactivation, and, counterintuitively, enrichment of FOXP3+ T cells. HIV infection of oral tonsil cultures in vitro causes an increase in FOXP3+ T cells expressing PD-1, IFN-γ, Amphiregulin and IL-10. These cells persist even in the presence of anti-retroviral drugs, and further expand when stimulated by TLR2 ligands and IL-1β. Mechanistically, IL-1β upregulates PD-1 expression via AKT signaling, and PD-1 stabilizes FOXP3 and Amphiregulin through a mechanism involving asparaginyl endopeptidase, resulting in FOXP3+ cells that are incapable of suppressing CD4+ T cells in vitro. The FOXP3+ T cells that are abundant in HIV-positive patients are phenotypically similar to the in vitro cultured, HIV-responsive FOXP3+ T cells, and their presence strongly correlates with CD4+ T cell hyper-activation. This suggests that FOXP3+ T cell dysregulation might play a role in the mucosal immune dysfunction of HIV patients on therapy.
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Affiliation(s)
- N Bhaskaran
- Department of Biological Sciences, School of Dental Medicine, Case Western Reserve University, Cleveland, OH, USA
| | - E Schneider
- Department of Biological Sciences, School of Dental Medicine, Case Western Reserve University, Cleveland, OH, USA
| | - F Faddoul
- Advanced Education in General Dentistry, School of Dental Medicine, Case Western Reserve University, Cleveland, OH, USA
| | - A Paes da Silva
- Department of Periodontics, School of Dental Medicine, Case Western Reserve University, Cleveland, OH, USA
| | - R Asaad
- University Hospitals Cleveland Medical Center AIDS Clinical Trials Unit, Division of Infectious Diseases & HIV Medicine, Cleveland, OH, USA
| | - A Talla
- Department of Pathology, School of Medicine, Case Western Reserve University, Cleveland, OH, USA
| | - N Greenspan
- Department of Pathology, School of Medicine, Case Western Reserve University, Cleveland, OH, USA
| | - A D Levine
- Department of Microbiology and Molecular Biology, School of Medicine, Case Western Reserve University, Cleveland, OH, USA
| | - D McDonald
- Division of AIDS, NIAID, NIH, Bethesda, MD, USA
| | - J Karn
- Department of Microbiology and Molecular Biology, School of Medicine, Case Western Reserve University, Cleveland, OH, USA
- Center for AIDS Research, School of Medicine, Case Western Reserve University, Cleveland, OH, USA
| | - M M Lederman
- University Hospitals Cleveland Medical Center AIDS Clinical Trials Unit, Division of Infectious Diseases & HIV Medicine, Cleveland, OH, USA
- Department of Pathology, School of Medicine, Case Western Reserve University, Cleveland, OH, USA
| | - P Pandiyan
- Department of Biological Sciences, School of Dental Medicine, Case Western Reserve University, Cleveland, OH, USA.
- Department of Pathology, School of Medicine, Case Western Reserve University, Cleveland, OH, USA.
- Center for AIDS Research, School of Medicine, Case Western Reserve University, Cleveland, OH, USA.
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Pseudomonas aeruginosa outer membrane vesicles ameliorates lung ischemia-reperfusion injury by regulating the balance of regulatory T cells and Th17 cells through Tim-3 and TLR4/NF-κB pathway. Inflamm Res 2021; 70:891-902. [PMID: 34223915 DOI: 10.1007/s00011-021-01483-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2020] [Revised: 06/15/2021] [Accepted: 06/21/2021] [Indexed: 10/20/2022] Open
Abstract
OBJECTIVE Regulatory T cells (Tregs) and T helper (Th) 17 cells are two subsets of CD4 + T cells with opposite effects which play a crucial role in the pathogenesis of lung injury. In this study, we aim to investigate the protective effect of Pseudomonas aeruginosa outer membrane vesicles (OMVs) preconditioning on lung ischemia-reperfusion (I/R) injury and potential mechanisms. METHODS Pathogen-free C57BL/6 mice were randomly divided into four groups: control, Control + OMVs, I/R and I/R + OMVs groups. Bronchoalveolar lavage fluid (BALF), serum, and lung tissues were collected and analyzed for pathophysiology and immune mechanism. RESULTS OMVs not only attenuated tissue injury and respiratory physiologic function but also mediated the downregulation of lung wet-to-dry weight ratio and the reduction of total protein concentration. The numbers of total cells, macrophages, neutrophils, and lymphocytes were markedly decreased in the I/R mice following OMVs preconditioning. OMVs also decreased inflammatory cytokines associated with CD4 + T cells in both BALF and serum. In addition, the level of Tregs and its transcription factor forkhead box P3 (Foxp3) were significantly increased, while the level of Th17 cells and its transcription factor retinoid-related orphan receptor γ (RORγt) were significantly decreased following OMVs preconditioning. In the process of exploring the underlying protection mechanisms of OMVs, we found that OMVs preconditioning significantly reduced protein expression of Toll-like receptor 4 (TLR4), which in turn not only inactivated myeloid differentiation factor 88 (MyD88) and Phosphorylated nuclear factor kappa B (p-NF-κB), but also simultaneously increased the levels of T-cell immunoglobulin and mucin domain-containing protein 3 (Tim-3). CONCLUSIONS These results suggest that OMVs preconditioning may ameliorate lung I/R injury by regulating the balance of Tregs and Th17 cells through Tim-3 and TLR4/NF-κB pathway.
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8
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Bhaskaran N, Jayaraman S, Quigley C, Mamileti P, Ghannoum M, Weinberg A, Thuener J, Pan Q, Pandiyan P. The Role of Dectin-1 Signaling in Altering Tumor Immune Microenvironment in the Context of Aging. Front Oncol 2021; 11:669066. [PMID: 33968777 PMCID: PMC8100664 DOI: 10.3389/fonc.2021.669066] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Accepted: 04/06/2021] [Indexed: 01/10/2023] Open
Abstract
An increased accumulation of immune-dysfunction-associated CD4+Foxp3+ regulatory T cells (Tregs) is observed in aging oral mucosa during infection. Here we studied the function of Tregs during oral cancer development in aging mucosa. First, we found heightened proportions of Tregs and myeloid-derived suppressor cells (MDSC) accumulating in mouse and human oral squamous cell carcinoma (OSCC) tissues. Using the mouse 4-Nitroquinoline 1-oxide(4-NQO) oral carcinogenesis model, we found that tongues of aged mice displayed increased propensity for epithelial cell dysplasia, hyperplasia, and accelerated OSCC development, which coincided with significantly increased abundance of IL-1β, Tregs, and MDSC in tongues. Partial depletion of Tregs reduced tumor burden. Moreover, fungal abundance and dectin-1 signaling were elevated in aged mice suggesting a potential role for dectin-1 in modulating immune environment and tumor development. Confirming this tenet, dectin-1 deficient mice showed diminished IL-1β, reduced infiltration of Tregs and MDSC in the tongues, as well as slower progression and reduced severity of tumor burden. Taken together, these data identify an important role of dectin-1 signaling in establishing the intra-tumoral immunosuppressive milieu and promoting OSCC tumorigenesis in the context of aging.
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Affiliation(s)
- Natarajan Bhaskaran
- Department of Biological Sciences, School of Dental Medicine, University Hospitals Cleveland Medical Center, Cleveland, OH, United States
| | - Sangeetha Jayaraman
- Department of Biological Sciences, School of Dental Medicine, University Hospitals Cleveland Medical Center, Cleveland, OH, United States
| | - Cheriese Quigley
- Department of Biological Sciences, School of Dental Medicine, University Hospitals Cleveland Medical Center, Cleveland, OH, United States
| | - Prerna Mamileti
- Department of Biological Sciences, School of Dental Medicine, University Hospitals Cleveland Medical Center, Cleveland, OH, United States
| | - Mahmoud Ghannoum
- Department of Pathology, University Hospitals Cleveland Medical Center, Cleveland, OH, United States.,Dermatology, School of Medicine, University Hospitals Cleveland Medical Center, Cleveland, OH, United States
| | - Aaron Weinberg
- Department of Biological Sciences, School of Dental Medicine, University Hospitals Cleveland Medical Center, Cleveland, OH, United States.,Case Comprehensive Cancer Center, Case Western Reserve University, University Hospitals Cleveland Medical Center, Cleveland, OH, United States
| | - Jason Thuener
- Otolaryngology-Head and Neck surgery, University Hospitals Cleveland Medical Center, Cleveland, OH, United States
| | - Quintin Pan
- Department of Pathology, University Hospitals Cleveland Medical Center, Cleveland, OH, United States.,Otolaryngology-Head and Neck surgery, University Hospitals Cleveland Medical Center, Cleveland, OH, United States
| | - Pushpa Pandiyan
- Department of Biological Sciences, School of Dental Medicine, University Hospitals Cleveland Medical Center, Cleveland, OH, United States.,Department of Pathology, University Hospitals Cleveland Medical Center, Cleveland, OH, United States.,Case Comprehensive Cancer Center, Case Western Reserve University, University Hospitals Cleveland Medical Center, Cleveland, OH, United States
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9
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O’Neil TR, Hu K, Truong NR, Arshad S, Shacklett BL, Cunningham AL, Nasr N. The Role of Tissue Resident Memory CD4 T Cells in Herpes Simplex Viral and HIV Infection. Viruses 2021; 13:359. [PMID: 33668777 PMCID: PMC7996247 DOI: 10.3390/v13030359] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 02/05/2021] [Accepted: 02/22/2021] [Indexed: 12/15/2022] Open
Abstract
Tissue-resident memory T cells (TRM) were first described in 2009. While initially the major focus was on CD8+ TRM, there has recently been increased interest in defining the phenotype and the role of CD4+ TRM in diseases. Circulating CD4+ T cells seed CD4+ TRM, but there also appears to be an equilibrium between CD4+ TRM and blood CD4+ T cells. CD4+ TRM are more mobile than CD8+ TRM, usually localized deeper within the dermis/lamina propria and yet may exhibit synergy with CD8+ TRM in disease control. This has been demonstrated in herpes simplex infections in mice. In human recurrent herpes infections, both CD4+ and CD8+ TRM persisting between lesions may control asymptomatic shedding through interferon-gamma secretion, although this has been more clearly shown for CD8+ T cells. The exact role of the CD4+/CD8+ TRM axis in the trigeminal ganglia and/or cornea in controlling recurrent herpetic keratitis is unknown. In HIV, CD4+ TRM have now been shown to be a major target for productive and latent infection in the cervix. In HSV and HIV co-infections, CD4+ TRM persisting in the dermis support HIV replication. Further understanding of the role of CD4+ TRM and their induction by vaccines may help control sexual transmission by both viruses.
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Affiliation(s)
- Thomas R. O’Neil
- Centre for Virus Research, The Westmead Institute for Medical Research, Westmead, NSW 2145, Australia; (T.R.O.); (K.H.); (N.R.T.); (S.A.)
- Westmead Clinical School, Faculty of Medicine and Health, The University of Sydney, Westmead, NSW 2145, Australia
| | - Kevin Hu
- Centre for Virus Research, The Westmead Institute for Medical Research, Westmead, NSW 2145, Australia; (T.R.O.); (K.H.); (N.R.T.); (S.A.)
- Westmead Clinical School, Faculty of Medicine and Health, The University of Sydney, Westmead, NSW 2145, Australia
| | - Naomi R. Truong
- Centre for Virus Research, The Westmead Institute for Medical Research, Westmead, NSW 2145, Australia; (T.R.O.); (K.H.); (N.R.T.); (S.A.)
- Westmead Clinical School, Faculty of Medicine and Health, The University of Sydney, Westmead, NSW 2145, Australia
| | - Sana Arshad
- Centre for Virus Research, The Westmead Institute for Medical Research, Westmead, NSW 2145, Australia; (T.R.O.); (K.H.); (N.R.T.); (S.A.)
- Westmead Clinical School, Faculty of Medicine and Health, The University of Sydney, Westmead, NSW 2145, Australia
| | - Barbara L. Shacklett
- Department of Medical Microbiology and Immunology, School of Medicine, University of California, Davis, CA 95616, USA;
| | - Anthony L. Cunningham
- Centre for Virus Research, The Westmead Institute for Medical Research, Westmead, NSW 2145, Australia; (T.R.O.); (K.H.); (N.R.T.); (S.A.)
- Westmead Clinical School, Faculty of Medicine and Health, The University of Sydney, Westmead, NSW 2145, Australia
| | - Najla Nasr
- Centre for Virus Research, The Westmead Institute for Medical Research, Westmead, NSW 2145, Australia; (T.R.O.); (K.H.); (N.R.T.); (S.A.)
- School of Medical Sciences, Faculty of Medicine and Health, The University of Sydney, Sydney, NSW 2000, Australia
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10
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Bhaskaran N, Faddoul F, Paes da Silva A, Jayaraman S, Schneider E, Mamileti P, Weinberg A, Pandiyan P. IL-1β-MyD88-mTOR Axis Promotes Immune-Protective IL-17A +Foxp3 + Cells During Mucosal Infection and Is Dysregulated With Aging. Front Immunol 2020; 11:595936. [PMID: 33240286 PMCID: PMC7677307 DOI: 10.3389/fimmu.2020.595936] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Accepted: 10/08/2020] [Indexed: 12/22/2022] Open
Abstract
CD4+Foxp3+Tregs maintain immune homeostasis, but distinct mechanisms underlying their functional heterogeneity during infections are driven by specific cytokine milieu. Here we show that MyD88 deletion in Foxp3+ cells altered their function and resulted in increased fungal burden and immunopathology during oral Candida albicans (CA) challenge. Excessive inflammation due to the absence of MyD88 in Tregs coincided with a reduction of the unique population of IL-17A expressing Foxp3+ cells (Treg17) and an increase in dysfunctional IFN-γ+/Foxp3+ cells (TregIFN-γ) in infected mice. Failure of MyD88-/- Tregs to regulate effector CD4+ T cell functions correlated with heightened levels of IFN-γ in CD4+ T cells, as well as increased infiltration of inflammatory monocytes and neutrophils in oral mucosa in vivo. Mechanistically, IL-1β/MyD88 signaling was required for the activation of IRAK-4, Akt, and mTOR, which led to the induction and proliferation of Treg17 cells. In the absence of IL-1 receptor signaling, Treg17 cells were reduced, but IL-6-driven expansion of TregIFN-γ cells was increased. This mechanism was physiologically relevant during Candida infection in aged mice, as they exhibited IL-1 receptor/MyD88 defect in Foxp3+ cells, loss of p-mTORhighTreg17 cells and reduced levels of IL-1β in oral mucosa, which coincided with persistent tongue inflammation. Concurrent with Treg dysfunction, aging was associated with increased CD4+ T cell hyperactivation and heightened levels of IL-6 in mice and humans in oral mucosa in vivo. Taken together, our data identify IL-1β/MyD88/Treg axis as a new component that modulates inflammatory responses in oral mucosa. Also, dysregulation of this axis in an aging immune system may skew host defense towards an immunopathological response in mucosal compartments.
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Affiliation(s)
- Natarajan Bhaskaran
- Department of Biological Sciences, Case Western Reserve University, Cleveland, OH, United States
| | - Fady Faddoul
- Advanced Education in General Dentistry, Case Western Reserve University, Cleveland, OH, United States
| | - Andre Paes da Silva
- Department of Periodontics, School of Dental Medicine, Case Western Reserve University, Cleveland, OH, United States
| | - Sangeetha Jayaraman
- Department of Biological Sciences, Case Western Reserve University, Cleveland, OH, United States
| | - Elizabeth Schneider
- Department of Biological Sciences, Case Western Reserve University, Cleveland, OH, United States
| | - Prerna Mamileti
- Department of Biological Sciences, Case Western Reserve University, Cleveland, OH, United States
| | - Aaron Weinberg
- Department of Biological Sciences, Case Western Reserve University, Cleveland, OH, United States
| | - Pushpa Pandiyan
- Department of Biological Sciences, Case Western Reserve University, Cleveland, OH, United States.,Department of Pathology, School of Medicine, Case Western Reserve University, Cleveland, OH, United States
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11
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Ezzeddini R, Somi MH, Taghikhani M, Moaddab SY, Masnadi Shirazi K, Shirmohammadi M, Eftekharsadat AT, Sadighi Moghaddam B, Salek Farrokhi A. Association of Foxp3 rs3761548 polymorphism with cytokines concentration in gastric adenocarcinoma patients. Cytokine 2020; 138:155351. [PMID: 33127257 DOI: 10.1016/j.cyto.2020.155351] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2020] [Revised: 09/14/2020] [Accepted: 10/16/2020] [Indexed: 12/18/2022]
Abstract
T regulatory cells (Tregs) and related-cytokines are effectively engaged in the process of tumor immune escape and functionally inhibit immune response against the tumor. This study aimed to investigate the association of Foxp3 gene single nucleotide polymorphism (SNP) (rs3761548) with serum IL-35, IL-10, and TGF-β levels in gastric adenocarcinoma (GA) patients. The blood samples were obtained from 150 GA patients and 166 control subjects. The polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) method was done to genotyping of Foxp3 gene polymorphism (rs3761548). The serum cytokines levels were measured using the ELISA method. According to genotyping, the AA, and AC genotypes and A allele demonstrated significantly greater risk of GA. Considering the Lauren classification, our results revealed a greater risk of GA progression in patients with AC + AA genotype compared to CC genotype. Moreover, significantly increased levels of IL-10, IL-35, and TGF-β were observed in GA patients compared to controls and also in diffuse-type compared to the intestinal type of GA patients. The IL-35, IL-10 concentrations in GA patients displayed significant differences between the participants with CC, AC and AA genotypes. Further analysis indicated the prognostic role of serum IL-35, IL-10, and TGF-β levels in GA patients. Our results confirmed that the Foxp3 polymorphism (rs3761548) could influence the predisposition to GA and the serum IL-10, IL-35, and TGF-β levels. Thus, this polymorphism might be involved in the GA progression through influencing Tregs function and the secretion of immunomodulatory cytokines.
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Affiliation(s)
- Rana Ezzeddini
- Liver and Gastrointestinal Diseases Research Center, Tabriz University of Medical Sciences, Tabriz, Iran; Department of Clinical Biochemistry, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran.
| | - Mohammad Hossein Somi
- Liver and Gastrointestinal Diseases Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mohammad Taghikhani
- Department of Clinical Biochemistry, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| | - Seyyed-Yaghoub Moaddab
- Liver and Gastrointestinal Diseases Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Kourosh Masnadi Shirazi
- Liver and Gastrointestinal Diseases Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Masoud Shirmohammadi
- Liver and Gastrointestinal Diseases Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Amir Taher Eftekharsadat
- Liver and Gastrointestinal Diseases Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Bizhan Sadighi Moghaddam
- Department of Immunology, School of Medicine, Semnan University of Medical Sciences, Semnan, Iran
| | - Amir Salek Farrokhi
- Department of Immunology, School of Medicine, Semnan University of Medical Sciences, Semnan, Iran.
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12
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Rogers O, Yen H, Solomon A, Drake C, Denmeade S. An IL-2 proaerolysin fusion toxin that selectively eliminates regulatory t cells to enhance antitumor immune response. Prostate 2019; 79:1071-1078. [PMID: 31059598 DOI: 10.1002/pros.23819] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/11/2019] [Revised: 04/03/2019] [Accepted: 04/09/2019] [Indexed: 01/22/2023]
Abstract
BACKGROUND Recent success with immune-checkpoint inhibitors in some tumor types has highlighted the power of the immune system to control and eradicate human cancer cells. However, these therapies have demonstrated a limited activity in prostate cancer, which has a more immunosuppressive microenvironment that can be because of the presence of a variety of inhibitory cell types, such as myeloid-derived suppressor cells, mesenchymal stem cells, and regulatory T cells (Tregs). One strategy to improve the efficacy of immune-based therapies for prostate cancer is to selectively eliminate these immunosuppressive cells within the tumor microenvironment. METHODS We developed and characterized a chimeric protein consisting of the cytokine IL-2 fused to binding mutant of the highly toxic bacterial toxin proaerolysin (ie IL2-R336A). RESULTS The IL2-R336A fusion protein selectively kills immunosuppressive Tregs that express the IL-2 receptor while having little to no effect on cells negative for this target. IL2-R336A depleted Tregs in both tumor bearing and nontumor bearing mice. Tumor bearing mice vaccinated with a GMCSF-expressing CT-26 GVAX vaccine had reduced tumor growth when given IL2-R336A before vaccination. IL2-R336A also enhanced immune response to a model hemagglutinin antigen (HA) in HA-tolerized mice. CONCLUSION These results suggest that this IL2-R336A toxin may be a useful in improving the therapeutic efficacy of antitumor vaccines by enhancing the immune response against target tumor antigens.
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Affiliation(s)
- Oliver Rogers
- The Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, Baltimore, Maryland
| | - Hung Yen
- The Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, Baltimore, Maryland
| | - Anna Solomon
- The Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, Baltimore, Maryland
| | - Charles Drake
- The Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, Baltimore, Maryland
| | - Samuel Denmeade
- The Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, Baltimore, Maryland
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13
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Bhatia S, Oweida A, Lennon S, Darragh LB, Milner D, Phan AV, Mueller AC, Van Court B, Raben D, Serkova NJ, Wang XJ, Jimeno A, Clambey ET, Pasquale EB, Karam SD. Inhibition of EphB4-Ephrin-B2 Signaling Reprograms the Tumor Immune Microenvironment in Head and Neck Cancers. Cancer Res 2019; 79:2722-2735. [PMID: 30894369 PMCID: PMC6522285 DOI: 10.1158/0008-5472.can-18-3257] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Revised: 01/15/2019] [Accepted: 03/14/2019] [Indexed: 12/26/2022]
Abstract
Identifying targets present in the tumor microenvironment that contribute to immune evasion has become an important area of research. In this study, we identified EphB4-ephrin-B2 signaling as a regulator of both innate and adaptive components of the immune system. EphB4 belongs to receptor tyrosine kinase family that interacts with ephrin-B2 ligand at sites of cell-cell contact, resulting in bidirectional signaling. We found that EphB4-ephrin-B2 inhibition alone or in combination with radiation (RT) reduced intratumoral regulatory T cells (Tregs) and increased activation of both CD8+ and CD4+Foxp3- T cells compared with the control group in an orthotopic head and neck squamous cell carcinoma (HNSCC) model. We also compared the effect of EphB4-ephrin-B2 inhibition combined with RT with combined anti-PDL1 and RT and observed similar tumor growth suppression, particularly at early time-points. A patient-derived xenograft model showed reduction of tumor-associated M2 macrophages and favored polarization towards an antitumoral M1 phenotype following EphB4-ephrin-B2 inhibition with RT. In vitro, EphB4 signaling inhibition decreased Ki67-expressing Tregs and Treg activation compared with the control group. Overall, our study is the first to implicate the role of EphB4-ephrin-B2 in tumor immune response. Moreover, our findings suggest that EphB4-ephrin-B2 inhibition combined with RT represents a potential alternative for patients with HNSCC and could be particularly beneficial for patients who are ineligible to receive or cannot tolerate anti-PDL1 therapy. SIGNIFICANCE: These findings present EphB4-ephrin-B2 inhibition as an alternative to anti-PDL1 therapeutics that can be used in combination with radiation to induce an effective antitumor immune response in patients with HNSCC.
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Affiliation(s)
- Shilpa Bhatia
- Department of Radiation Oncology, University of Colorado Denver, Anschutz Medical Campus, Aurora, Colorado
| | - Ayman Oweida
- Department of Radiation Oncology, University of Colorado Denver, Anschutz Medical Campus, Aurora, Colorado
| | - Shelby Lennon
- Department of Radiation Oncology, University of Colorado Denver, Anschutz Medical Campus, Aurora, Colorado
| | - Laurel B Darragh
- Department of Radiation Oncology, University of Colorado Denver, Anschutz Medical Campus, Aurora, Colorado
| | - Dallin Milner
- Department of Radiation Oncology, University of Colorado Denver, Anschutz Medical Campus, Aurora, Colorado
| | - Andy V Phan
- Department of Radiation Oncology, University of Colorado Denver, Anschutz Medical Campus, Aurora, Colorado
| | - Adam C Mueller
- Department of Radiation Oncology, University of Colorado Denver, Anschutz Medical Campus, Aurora, Colorado
| | - Benjamin Van Court
- Department of Radiation Oncology, University of Colorado Denver, Anschutz Medical Campus, Aurora, Colorado
| | - David Raben
- Department of Radiation Oncology, University of Colorado Denver, Anschutz Medical Campus, Aurora, Colorado
| | - Natalie J Serkova
- Department of Anesthesiology, University of Colorado Denver, Anschutz Medical Campus, Aurora, Colorado
| | - Xiao-Jing Wang
- Department of Pathology, University of Colorado Denver, Anschutz Medical Campus, Aurora, Colorado
- Veterans Affairs Medical Center, VA Eastern Colorado Health Care System, Aurora, Colorado
| | - Antonio Jimeno
- Division of Medical Oncology, Department of Medicine, University of Colorado Denver, Anschutz Medical Campus, Aurora, Colorado
| | - Eric T Clambey
- Department of Anesthesiology, University of Colorado Denver, Anschutz Medical Campus, Aurora, Colorado
| | - Elena B Pasquale
- Cancer Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, California
| | - Sana D Karam
- Department of Radiation Oncology, University of Colorado Denver, Anschutz Medical Campus, Aurora, Colorado.
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14
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Mock JR, Dial CF, Tune MK, Norton DL, Martin JR, Gomez JC, Hagan RS, Dang H, Doerschuk CM. Transcriptional analysis of Foxp3+ Tregs and functions of two identified molecules during resolution of ALI. JCI Insight 2019; 4:124958. [PMID: 30753170 DOI: 10.1172/jci.insight.124958] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Accepted: 02/05/2019] [Indexed: 12/17/2022] Open
Abstract
Recovery from acute lung injury (ALI) is an active process. Foxp3+ Tregs contribute to recovery from ALI through modulating immune responses and enhancing alveolar epithelial proliferation and tissue repair. The current study investigates Treg transcriptional profiles during resolution of ALI in mice. Tregs from either lung or splenic tissue were isolated from uninjured mice or mice recovering from ALI and then examined for differential gene expression between these conditions. In mice with ALI, Tregs isolated from the lungs had hundreds of differentially expressed transcripts compared with those from the spleen, indicating that organ specificity and microenvironment are critical in Treg function. These regulated transcripts suggest which intracellular signaling pathways modulate Treg behavior. Interestingly, several transcripts having no prior recognized function in Tregs were differentially expressed by lung Tregs during resolution. Further investigation into 2 identified transcripts, Mmp12 and Sik1, revealed that Treg-specific expression of each plays a role in Treg-promoted ALI resolution. This study provides potentially novel information describing the signals that may expand resident Tregs, recruit or retain them to the lung during ALI, and modulate their function. The results provide insight into both tissue- and immune microenvironment-specific transcriptional differences through which Tregs direct their effects.
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Affiliation(s)
- Jason R Mock
- Division of Pulmonary Diseases and Critical Care Medicine, Department of Medicine.,Marsico Lung Institute, and
| | - Catherine F Dial
- Division of Pulmonary Diseases and Critical Care Medicine, Department of Medicine.,Marsico Lung Institute, and
| | - Miriya K Tune
- Division of Pulmonary Diseases and Critical Care Medicine, Department of Medicine.,Marsico Lung Institute, and
| | - Dustin L Norton
- Division of Pulmonary Diseases and Critical Care Medicine, Department of Medicine.,Marsico Lung Institute, and
| | - Jessica R Martin
- Marsico Lung Institute, and.,Center for Airways Disease, University of North Carolina (UNC), Chapel Hill, North Carolina, USA
| | - John C Gomez
- Marsico Lung Institute, and.,Center for Airways Disease, University of North Carolina (UNC), Chapel Hill, North Carolina, USA
| | - Robert S Hagan
- Division of Pulmonary Diseases and Critical Care Medicine, Department of Medicine.,Marsico Lung Institute, and
| | | | - Claire M Doerschuk
- Division of Pulmonary Diseases and Critical Care Medicine, Department of Medicine.,Marsico Lung Institute, and.,Center for Airways Disease, University of North Carolina (UNC), Chapel Hill, North Carolina, USA
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15
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Pandiyan P, Bhaskaran N, Zou M, Schneider E, Jayaraman S, Huehn J. Microbiome Dependent Regulation of T regs and Th17 Cells in Mucosa. Front Immunol 2019; 10:426. [PMID: 30906299 PMCID: PMC6419713 DOI: 10.3389/fimmu.2019.00426] [Citation(s) in RCA: 150] [Impact Index Per Article: 30.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2018] [Accepted: 02/18/2019] [Indexed: 12/19/2022] Open
Abstract
Mammals co-exist with resident microbial ecosystem that is composed of an incredible number and diversity of bacteria, viruses and fungi. Owing to direct contact between resident microbes and mucosal surfaces, both parties are in continuous and complex interactions resulting in important functional consequences. These interactions govern immune homeostasis, host response to infection, vaccination and cancer, as well as predisposition to metabolic, inflammatory and neurological disorders. Here, we discuss recent studies on direct and indirect effects of resident microbiota on regulatory T cells (Tregs) and Th17 cells at the cellular and molecular level. We review mechanisms by which commensal microbes influence mucosa in the context of bioactive molecules derived from resident bacteria, immune senescence, chronic inflammation and cancer. Lastly, we discuss potential therapeutic applications of microbiota alterations and microbial derivatives, for improving resilience of mucosal immunity and combating immunopathology.
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Affiliation(s)
- Pushpa Pandiyan
- Department of Biological Sciences, School of Dental Medicine, Case Western Reserve University, Cleveland, OH, United States
| | - Natarajan Bhaskaran
- Department of Biological Sciences, School of Dental Medicine, Case Western Reserve University, Cleveland, OH, United States
| | - Mangge Zou
- Experimental Immunology, Helmholtz Centre for Infection Research, Hamburg, Germany.,Cluster of Excellence RESIST (EXC 2155), Hannover Medical School, Hannover, Germany
| | - Elizabeth Schneider
- Department of Biological Sciences, School of Dental Medicine, Case Western Reserve University, Cleveland, OH, United States
| | - Sangeetha Jayaraman
- Department of Biological Sciences, School of Dental Medicine, Case Western Reserve University, Cleveland, OH, United States
| | - Jochen Huehn
- Experimental Immunology, Helmholtz Centre for Infection Research, Hamburg, Germany.,Cluster of Excellence RESIST (EXC 2155), Hannover Medical School, Hannover, Germany
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16
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Caruso MP, Falivene J, Holgado MP, Zurita DH, Laufer N, Castro C, Nico Á, Maeto C, Salido J, Pérez H, Salomón H, Cahn P, Sued O, Fink V, Turk G, Gherardi MM. Impact of HIV-ART on the restoration of Th17 and Treg cells in blood and female genital mucosa. Sci Rep 2019; 9:1978. [PMID: 30760809 PMCID: PMC6374372 DOI: 10.1038/s41598-019-38547-1] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Accepted: 01/02/2019] [Indexed: 12/28/2022] Open
Abstract
The aim of this study was to evaluate the effectiveness of antiretroviral treatment (ART) on the proportion and functions of Th17 and Treg cells in peripheral blood and female genital tract (FGT) respectively. To this aim, samples from 41 HIV-neg, 33 HIV+ ART-naïve and 32 HIV+ ART+ subjects were obtained. In peripheral blood, altered Th17 and Th17/Treg proportions were normalized in HIV+ ART+, but certain abnormal Treg and activated T-cell proportions were still observed. In FGT, abnormal patterns of secretion for Th17-related cytokines were observed in cervical mononuclear cells (CMCs) from HIV+ women, even in those from HIV+ ART+, compared to the HIV-neg group. Moreover, these altered patterns of secretion were associated with diminished levels of CXCL5 and CXCL1 chemokines and with an immunoregulatory skew in the CCL17/CCL20 ratio in ectocervix samples of these women. Finally, ART did not restore proportions of Th17-precursor cells with gut-homing potential in PBMCs, and positive correlations between these cells and the levels of IL-17F and IL-21 production by CMCs may suggest that a better homing of these cells to the intestine could also imply a better restoration of these cells in the female genital tract. These results indicate that antiretroviral treatment did not restore Th17-related immune functions completely at the female mucosal level.
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Affiliation(s)
- María Paula Caruso
- Instituto de Investigaciones Biomédicas en Retrovirus y SIDA (INBIRS), Universidad de Buenos Aires-CONICET, Buenos Aires, Argentina
| | - Juliana Falivene
- Instituto de Investigaciones Biomédicas en Retrovirus y SIDA (INBIRS), Universidad de Buenos Aires-CONICET, Buenos Aires, Argentina
| | - María Pía Holgado
- Instituto de Investigaciones Biomédicas en Retrovirus y SIDA (INBIRS), Universidad de Buenos Aires-CONICET, Buenos Aires, Argentina
| | | | - Natalia Laufer
- Instituto de Investigaciones Biomédicas en Retrovirus y SIDA (INBIRS), Universidad de Buenos Aires-CONICET, Buenos Aires, Argentina
- Hospital J.A. Fernández, Buenos Aires, Argentina
| | | | - Ángeles Nico
- Hospital J.A. Fernández, Buenos Aires, Argentina
| | - Cynthia Maeto
- Instituto de Investigaciones Biomédicas en Retrovirus y SIDA (INBIRS), Universidad de Buenos Aires-CONICET, Buenos Aires, Argentina
| | - Jimena Salido
- Instituto de Investigaciones Biomédicas en Retrovirus y SIDA (INBIRS), Universidad de Buenos Aires-CONICET, Buenos Aires, Argentina
| | - Héctor Pérez
- Hospital J.A. Fernández, Buenos Aires, Argentina
| | - Horacio Salomón
- Instituto de Investigaciones Biomédicas en Retrovirus y SIDA (INBIRS), Universidad de Buenos Aires-CONICET, Buenos Aires, Argentina
| | - Pedro Cahn
- Hospital J.A. Fernández, Buenos Aires, Argentina
- Fundación Huésped, Buenos Aires, Argentina
| | - Omar Sued
- Fundación Huésped, Buenos Aires, Argentina
| | - Valeria Fink
- Hospital J.A. Fernández, Buenos Aires, Argentina
- Fundación Huésped, Buenos Aires, Argentina
| | - Gabriela Turk
- Instituto de Investigaciones Biomédicas en Retrovirus y SIDA (INBIRS), Universidad de Buenos Aires-CONICET, Buenos Aires, Argentina
| | - María Magdalena Gherardi
- Instituto de Investigaciones Biomédicas en Retrovirus y SIDA (INBIRS), Universidad de Buenos Aires-CONICET, Buenos Aires, Argentina.
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17
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Wu YY, Hsieh CT, Tsay GJ, Kao JT, Chiu YM, Shieh DC, Lee YJ. Recruitment of CCR6 + Foxp3 + regulatory gastric infiltrating lymphocytes in Helicobacter pylori gastritis. Helicobacter 2019; 24:e12550. [PMID: 30412323 DOI: 10.1111/hel.12550] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/20/2018] [Revised: 09/09/2018] [Accepted: 09/10/2018] [Indexed: 12/17/2022]
Abstract
Helicobacter pylori (H. pylori) infection is associated with an inflammatory response in the gastric mucosa, leading to chronic gastritis, peptic ulcers, and gastric cancer. Increased T-cell infiltration is found at sites of H. pylori infection. The CCR6+ subset of CD4+ regulatory T cells (Tregs), a newly characterized subset of Tregs, has been reported to contribute to local immune inhibition. However, whether CCR6+ Tregs are present in H. pylori gastritis, and what their relationship is to disease prognosis, remains to be elucidated. In this study, gastric infiltrating lymphocytes were isolated from endoscopic biopsy specimens of H. pylori gastritis patients and analyzed. We found that in gastric infiltrating lymphocytes, CCR6+ CD4+ CD25high Tregs, which express high levels of CD45RO, are positively associated with more severe inflammation in gastric mucosa during H. pylori infection. Furthermore, the frequency of CCR6+ Tregs in gastric infiltrating lymphocytes, but not CCR6- Tregs, is significantly increased in inflamed gastric tissues, which is inversely correlated with significantly lower expression of IFN-γ+ CD8+ T cells. We also found that the frequency of CCR6+ Tregs is positively correlated with the frequency of CD4+ IFN-γ+ T cells. In addition, the frequency of CCR6+ Tregs, but not that of CCR6- Tregs, is significantly correlated with increased inflammation in H. pylori gastritis. This study demonstrates that immunosuppression in H. pylori gastritis might be related to the activity of CCR6+ Tregs, which could influence disease prognosis.
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Affiliation(s)
- Yi-Ying Wu
- Department of Medical Laboratory Science and Biotechnology, China Medical University, Taichung, Taiwan.,Chinese Medicine Research Center, China Medical University, Taichung, Taiwan.,Research Center for Chinese Herbal Medicine, China Medical University, Taichung, Taiwan
| | - Chin-Tung Hsieh
- Department of Pediatrics, Lotung Poh-Ai Hospital, I-Lan, Taiwan
| | - Gregory J Tsay
- Division of Immunology and Rheumatology, Department of Internal Medicine, China Medical University Hospital, Taichung, Taiwan.,Department of Internal Medicine, School of Medicine, China Medical University Hospital, China Medical University, Taichung, Taiwan
| | - Jung-Ta Kao
- Department of Internal Medicine, School of Medicine, China Medical University Hospital, China Medical University, Taichung, Taiwan.,Graduate Institute of Clinical Medical Science, China Medical University, Taichung, Taiwan
| | - Ying-Ming Chiu
- Department of Nursing, College of Nursing, Hungkuang University, Taichung, Taiwan.,Division of Allergy, Immunology & Rheumatology, Changhua Christian Hospital, Changhua, Taiwan
| | - Dong-Chen Shieh
- Department of Nursing, College of Nursing, Hungkuang University, Taichung, Taiwan
| | - Yi-Ju Lee
- Institute of Biochemistry, Microbiology and Immunology, Chung Shan Medical University, Taichung, Taiwan
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18
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Bhaskaran N, Quigley C, Paw C, Butala S, Schneider E, Pandiyan P. Role of Short Chain Fatty Acids in Controlling T regs and Immunopathology During Mucosal Infection. Front Microbiol 2018; 9:1995. [PMID: 30197637 PMCID: PMC6117408 DOI: 10.3389/fmicb.2018.01995] [Citation(s) in RCA: 88] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Accepted: 08/08/2018] [Indexed: 01/12/2023] Open
Abstract
Interactions between mucosal tissues and commensal microbes control appropriate host immune responses and inflammation, but very little is known about these interactions. Here we show that the depletion of resident bacteria using antibiotics (Abx) causes oral and gut immunopathology during oropharyngeal candidiasis (OPC) infection. Antibiotic treatment causes reduction in the frequency of Foxp3+ regulatory cells (Tregs) and IL-17A producers, with a concomitant increase in oral tissue pathology. While C. albicans (CA) is usually controlled in the oral cavity, antibiotic treatment led to CA dependent oral and gut inflammation. A combination of short chain fatty acids (SCFA) controlled the pathology in Abx treated mice, correlating to an increase in the frequency of Foxp3+, IL-17A+, and Foxp3+IL-17A+ double positive (Treg17) cells in tongue and oral draining lymph nodes. However, SCFA treatment did not fully reverse the gut inflammation suggesting that resident microbiota have SCFA independent homeostatic mechanisms in gut mucosa. We also found that SCFA potently induce Foxp3 and IL-17A expression in CD4+ T cells, depending on the cytokine milieu in vitro. Depletion of Tregs alone in FDTR mice recapitulated oral inflammation in CA infected mice, showing that Abx mediated reduction of Tregs was involved in infection induced pathology. SCFA did not control inflammation in Treg depleted mice in CA infected FDTR mice, showing that Foxp3+ T cell induction was required for the protective effect mediated by SCFA. Taken together, our data reveal that SCFA derived from resident bacteria play a critical role in controlling immunopathology by regulating T cell cytokines during mucosal infections. This study has broader implications on protective effects of resident microbiota in regulating pathological infections.
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Affiliation(s)
- Natarajan Bhaskaran
- Department of Biological Sciences, School of Dental Medicine, Case Western Reserve University, Cleveland, OH, United States
| | - Cheriese Quigley
- Department of Biological Sciences, School of Dental Medicine, Case Western Reserve University, Cleveland, OH, United States
| | - Clarissa Paw
- Department of Biological Sciences, School of Dental Medicine, Case Western Reserve University, Cleveland, OH, United States
| | - Shivani Butala
- Department of Biological Sciences, School of Dental Medicine, Case Western Reserve University, Cleveland, OH, United States
| | - Elizabeth Schneider
- Department of Biological Sciences, School of Dental Medicine, Case Western Reserve University, Cleveland, OH, United States
| | - Pushpa Pandiyan
- Department of Biological Sciences, School of Dental Medicine, Case Western Reserve University, Cleveland, OH, United States
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19
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Kumar V. T cells and their immunometabolism: A novel way to understanding sepsis immunopathogenesis and future therapeutics. Eur J Cell Biol 2018; 97:379-392. [PMID: 29773345 DOI: 10.1016/j.ejcb.2018.05.001] [Citation(s) in RCA: 62] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2018] [Revised: 03/03/2018] [Accepted: 05/03/2018] [Indexed: 02/08/2023] Open
Abstract
Sepsis has always been considered as a big challenge for pharmaceutical companies in terms of discovering and designing new therapeutics. The pathogenesis of sepsis involves aberrant activation of innate immune cells (i.e. macrophages, neutrophils etc.) at early stages. However, a stage of immunosuppression is also observed during sepsis even in the patients who have recovered from it. This stage of immunosuppression is observed due to the loss of conventional (i.e. CD4+, CD8+) T cells, Th17 cells and an upregulation of regulatory T cells (Tregs). This process also impacts metabolic processes controlling immune cell metabolism called immunometabolism. The present review is focused on the T cell-mediated immune response, their immunometabolism and targeting T cell immunometabolism during sepsis as future therapeutic approach. The first part of the manuscripts describes an impact of sepsis on conventional T cells, Th17 cells and Tregs along with their impact on sepsis. The subsequent section further describes the immunometabolism of these cells (CD4+, CD8+, Th17, and Tregs) under normal conditions and during sepsis-induced immunosuppression. The article ends with the therapeutic targeting of T cell immunometabolism (both conventional T cells and Tregs) during sepsis as a future immunomodulatory approach for its management.
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Affiliation(s)
- V Kumar
- Children's Health Queensland Clinical Unit, School of Clinical Medicine, Mater Research, Faculty of Medicine, University of Queensland, St. Lucia, Brisbane, Queensland 4078, Australia; School of Biomedical Sciences, Faculty of Medicine, University of Queensland, St. Lucia, Brisbane, Queensland 4078, Australia.
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20
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Koparde V, Abdul Razzaq B, Suntum T, Sabo R, Scalora A, Serrano M, Jameson-Lee M, Hall C, Kobulnicky D, Sheth N, Feltz J, Contaifer D, Wijesinghe D, Reed J, Roberts C, Qayyum R, Buck G, Neale M, Toor A. Dynamical system modeling to simulate donor T cell response to whole exome sequencing-derived recipient peptides: Understanding randomness in alloreactivity incidence following stem cell transplantation. PLoS One 2017; 12:e0187771. [PMID: 29194460 PMCID: PMC5711034 DOI: 10.1371/journal.pone.0187771] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2017] [Accepted: 10/25/2017] [Indexed: 12/01/2022] Open
Abstract
Quantitative relationship between the magnitude of variation in minor histocompatibility antigens (mHA) and graft versus host disease (GVHD) pathophysiology in stem cell transplant (SCT) donor-recipient pairs (DRP) is not established. In order to elucidate this relationship, whole exome sequencing (WES) was performed on 27 HLA matched related (MRD), & 50 unrelated donors (URD), to identify nonsynonymous single nucleotide polymorphisms (SNPs). An average 2,463 SNPs were identified in MRD, and 4,287 in URD DRP (p<0.01); resulting peptide antigens that may be presented on HLA class I molecules in each DRP were derived in silico (NetMHCpan ver2.0) and the tissue expression of proteins these were derived from determined (GTex). MRD DRP had an average 3,670 HLA-binding-alloreactive peptides, putative mHA (pmHA) with an IC50 of <500 nM, and URD, had 5,386 (p<0.01). To simulate an alloreactive donor cytotoxic T cell response, the array of pmHA in each patient was considered as an operator matrix modifying a hypothetical cytotoxic T cell clonal vector matrix; each responding T cell clone’s proliferation was determined by the logistic equation of growth, accounting for HLA binding affinity and tissue expression of each alloreactive peptide. The resulting simulated organ-specific alloreactive T cell clonal growth revealed marked variability, with the T cell count differences spanning orders of magnitude between different DRP. Despite an estimated, uniform set of constants used in the model for all DRP, and a heterogeneously treated group of patients, higher total and organ-specific T cell counts were associated with cumulative incidence of moderate to severe GVHD in recipients. In conclusion, exome wide sequence differences and the variable alloreactive peptide binding to HLA in each DRP yields a large range of possible alloreactive donor T cell responses. Our findings also help understand the apparent randomness observed in the development of alloimmune responses.
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Affiliation(s)
- Vishal Koparde
- Center for the Study of Biological Complexity, Virginia Commonwealth University, Richmond, Virginia, United States of America
| | - Badar Abdul Razzaq
- Bone Marrow Transplant Program, Department of Internal Medicine, Massey Cancer Center, Virginia Commonwealth University, Richmond, Virginia, United States of America
| | - Tara Suntum
- Bone Marrow Transplant Program, Department of Internal Medicine, Massey Cancer Center, Virginia Commonwealth University, Richmond, Virginia, United States of America
| | - Roy Sabo
- Department of Biostatistics, Virginia Commonwealth University, Richmond, Virginia, United States of America
| | - Allison Scalora
- Bone Marrow Transplant Program, Department of Internal Medicine, Massey Cancer Center, Virginia Commonwealth University, Richmond, Virginia, United States of America
| | - Myrna Serrano
- Center for the Study of Biological Complexity, Virginia Commonwealth University, Richmond, Virginia, United States of America
| | - Max Jameson-Lee
- Bone Marrow Transplant Program, Department of Internal Medicine, Massey Cancer Center, Virginia Commonwealth University, Richmond, Virginia, United States of America
| | - Charles Hall
- Bone Marrow Transplant Program, Department of Internal Medicine, Massey Cancer Center, Virginia Commonwealth University, Richmond, Virginia, United States of America
| | - David Kobulnicky
- Bone Marrow Transplant Program, Department of Internal Medicine, Massey Cancer Center, Virginia Commonwealth University, Richmond, Virginia, United States of America
| | - Nihar Sheth
- Center for the Study of Biological Complexity, Virginia Commonwealth University, Richmond, Virginia, United States of America
| | - Juliana Feltz
- Center for the Study of Biological Complexity, Virginia Commonwealth University, Richmond, Virginia, United States of America
| | - Daniel Contaifer
- School of Pharmacy, Virginia Commonwealth University, Richmond, Virginia, United States of America
| | - Dayanjan Wijesinghe
- School of Pharmacy, Virginia Commonwealth University, Richmond, Virginia, United States of America
| | - Jason Reed
- Department of Physics, Virginia Commonwealth University, Richmond, Virginia, United States of America
| | - Catherine Roberts
- Bone Marrow Transplant Program, Department of Internal Medicine, Massey Cancer Center, Virginia Commonwealth University, Richmond, Virginia, United States of America
| | - Rehan Qayyum
- Section of Hospital Medicine, Department of Internal Medicine, Virginia Commonwealth University, Richmond, Virginia, United States of America
| | - Gregory Buck
- Center for the Study of Biological Complexity, Virginia Commonwealth University, Richmond, Virginia, United States of America
- Department of Microbiology and Immunology, Virginia Commonwealth University, Richmond, Virginia, United States of America
| | - Michael Neale
- Departments of Psychiatry and Human & Molecular Genetics, Virginia Commonwealth University, Richmond, Virginia, United States of America
| | - Amir Toor
- Bone Marrow Transplant Program, Department of Internal Medicine, Massey Cancer Center, Virginia Commonwealth University, Richmond, Virginia, United States of America
- * E-mail:
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21
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Protecting the Newborn and Young Infant from Infectious Diseases: Lessons from Immune Ontogeny. Immunity 2017; 46:350-363. [PMID: 28329702 DOI: 10.1016/j.immuni.2017.03.009] [Citation(s) in RCA: 277] [Impact Index Per Article: 39.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2016] [Revised: 12/20/2016] [Accepted: 03/06/2017] [Indexed: 12/14/2022]
Abstract
Infections in the first year of life are common and often severe. The newborn host demonstrates both quantitative and qualitative differences to the adult in nearly all aspects of immunity, which at least partially explain the increased susceptibility to infection. Here we discuss how differences in susceptibility to infection result not out of a state of immaturity, but rather reflect adaptation to the particular demands placed on the immune system in early life. We review the mechanisms underlying host defense in the very young, and discuss how specific developmental demands increase the risk of particular infectious diseases. In this context, we discuss how this plasticity, i.e. the capacity to adapt to demands encountered in early life, also provides the potential to leverage protection of the young against infection and disease through a number of interventions.
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22
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Rahe MC, Murtaugh MP. Mechanisms of Adaptive Immunity to Porcine Reproductive and Respiratory Syndrome Virus. Viruses 2017; 9:v9060148. [PMID: 28608816 PMCID: PMC5490824 DOI: 10.3390/v9060148] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2017] [Revised: 05/25/2017] [Accepted: 06/07/2017] [Indexed: 02/07/2023] Open
Abstract
The adaptive immune response is necessary for the development of protective immunity against infectious diseases. Porcine reproductive and respiratory syndrome virus (PRRSV), a genetically heterogeneous and rapidly evolving RNA virus, is the most burdensome pathogen of swine health and wellbeing worldwide. Viral infection induces antigen-specific immunity that ultimately clears the infection. However, the resulting immune memory, induced by virulent or attenuated vaccine viruses, is inconsistently protective against diverse viral strains. The immunological mechanisms by which primary and memory protection are generated and used are not well understood. Here, we summarize current knowledge regarding cellular and humoral components of the adaptive immune response to PRRSV infection that mediate primary and memory immune protection against viruses.
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Affiliation(s)
- Michael C Rahe
- Department of Veterinary and Biomedical Sciences, University of Minnesota, 1971 Commonwealth Avenue, St. Paul, MN 55108, USA.
| | - Michael P Murtaugh
- Department of Veterinary and Biomedical Sciences, University of Minnesota, 1971 Commonwealth Avenue, St. Paul, MN 55108, USA.
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Passmore JAS, Williamson AL. Host Immune Responses Associated with Clearance or Persistence of Human Papillomavirus Infections. CURRENT OBSTETRICS AND GYNECOLOGY REPORTS 2016. [DOI: 10.1007/s13669-016-0163-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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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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Pandiyan P, Younes SA, Ribeiro SP, Talla A, McDonald D, Bhaskaran N, Levine AD, Weinberg A, Sekaly RP. Mucosal Regulatory T Cells and T Helper 17 Cells in HIV-Associated Immune Activation. Front Immunol 2016; 7:228. [PMID: 27379092 PMCID: PMC4913236 DOI: 10.3389/fimmu.2016.00228] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2016] [Accepted: 05/26/2016] [Indexed: 12/12/2022] Open
Abstract
Residual mucosal inflammation along with chronic systemic immune activation is an important feature in individuals infected with human immunodeficiency virus (HIV), and has been linked to a wide range of co-morbidities, including malignancy, opportunistic infections, immunopathology, and cardiovascular complications. Although combined antiretroviral therapy (cART) can reduce plasma viral loads to undetectable levels, reservoirs of virus persist, and increased mortality is associated with immune dysbiosis in mucosal lymphoid tissues. Immune-based therapies are pursued with the goal of improving CD4+ T-cell restoration, as well as reducing chronic immune activation in cART-treated patients. However, the majority of research on immune activation has been derived from analysis of circulating T cells. How immune cell alterations in mucosal tissues contribute to HIV immune dysregulation and the associated risk of non-infectious chronic complications is less studied. Given the significant differences between mucosal T cells and circulating T cells, and the immediate interactions of mucosal T cells with the microbiome, more attention should be devoted to mucosal immune cells and their contribution to systemic immune activation in HIV-infected individuals. Here, we will focus on mucosal immune cells with a specific emphasis on CD4+ T lymphocytes, such as T helper 17 cells and CD4+Foxp3+ regulatory T cells (Tregs), which play crucial roles in maintaining mucosal barrier integrity and preventing inflammation, respectively. We hypothesize that pro-inflammatory milieu in cART-treated patients with immune activation significantly contributes to enhanced loss of Th17 cells and increased frequency of dysregulated Tregs in the mucosa, which in turn may exacerbate immune dysfunction in HIV-infected patients. We also present initial evidence to support this hypothesis. A better comprehension of how pro-inflammatory milieu impacts these two types of cells in the mucosa will shed light on mucosal immune dysfunction and HIV reservoirs, and lead to novel ways to restore immune functions in HIV+ patients.
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Affiliation(s)
- Pushpa Pandiyan
- Department of Biological Sciences, School of Dental Medicine, Case Western Reserve University , Cleveland, OH , USA
| | - Souheil-Antoine Younes
- Department of Medicine, Division of Infectious Diseases, University Hospitals, Case Western Reserve University , Cleveland, OH , USA
| | | | - Aarthi Talla
- Department of Pathology, Case Western Reserve University , Cleveland, OH , USA
| | - David McDonald
- Department of Microbiology and Molecular Biology, School of Medicine, Case Western Reserve University , Cleveland, OH , USA
| | - Natarajan Bhaskaran
- Department of Biological Sciences, School of Dental Medicine, Case Western Reserve University , Cleveland, OH , USA
| | - Alan D Levine
- Department of Pharmacology, School of Medicine, Case Western Reserve University , Cleveland, OH , USA
| | - Aaron Weinberg
- Department of Biological Sciences, School of Dental Medicine, Case Western Reserve University , Cleveland, OH , USA
| | - Rafick P Sekaly
- Department of Pathology, Case Western Reserve University , Cleveland, OH , USA
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Dynamic changes in CD45RA(-)Foxp3(high) regulatory T-cells in chronic hepatitis C patients during antiviral therapy. Int J Infect Dis 2016; 45:5-12. [PMID: 26875600 DOI: 10.1016/j.ijid.2016.02.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2015] [Revised: 01/27/2016] [Accepted: 02/06/2016] [Indexed: 12/31/2022] Open
Abstract
OBJECTIVES CD4(+)Foxp3(+) regulatory T-cells (Treg) are known to accumulate under certain pathological conditions. This study was conducted to evaluate the characteristics of and dynamic changes in Treg cells in chronic hepatitis C (CHC) patients during antiviral therapy. METHODS One hundred and forty-five subjects were enrolled in this study, including 105 CHC patients and 40 healthy donors. The phenotypes and functions of Treg cells were analyzed by flow cytometry. RESULTS A significant elevation in Treg cells was observed in the peripheral blood of CHC patients compared with healthy donors. Interestingly, compared with non-suppressive Treg (non-Treg) and resting Treg (rTreg) cells, activated Treg (aTreg) cells expressed higher levels of ectonucleotidase, CD39, and CD73. After treatment with interferon alpha (IFN-α) and ribavirin (RBV) in vitro, the frequencies of total Treg cells and aTreg cells in peripheral blood mononuclear cells (PBMC), as well as the levels of transforming growth factor beta (TGF-β) secreted by aTreg and non-Treg cells, were significantly decreased. Importantly, it was found that levels of aTreg cells in patients with a sustained virological response (SVR) were lower than in relapsed patients, suggesting that a high frequency of aTreg cells might be associated with a poor clinical outcome in HCV infection. CONCLUSION These results demonstrate a decreasing trend in aTreg cells, which express higher levels of CD39, CD73, and TGF-β, in SVR patients during antiviral therapy.
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Pandiyan P, Zhu J. Origin and functions of pro-inflammatory cytokine producing Foxp3+ regulatory T cells. Cytokine 2015; 76:13-24. [PMID: 26165923 DOI: 10.1016/j.cyto.2015.07.005] [Citation(s) in RCA: 92] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2015] [Revised: 06/24/2015] [Accepted: 07/03/2015] [Indexed: 12/12/2022]
Abstract
CD4(+)CD25(+)Foxp3(+) regulatory cells (Tregs) are a special lineage of cells central in the maintenance of immune homeostasis, and are targeted for human immunotherapy. They are conventionally associated with the production of classical anti-inflammatory cytokines such as IL-10, TGF-β and IL-35, consistent to their anti-inflammatory functions. However, emerging evidence show that they also express effector cytokines such as IFN-γ and IL-17A under inflammatory conditions. While some studies reveal that these pro-inflammatory cytokine producing Foxp3(+) regulatory cells retain their suppressive ability, others believe that these cells are dys-regulated and are associated with perpetuation of immunopathology. Therefore the development of these cells may challenge the efficacy of human Treg therapy. Mechanistically, toll-like receptor (TLR) ligands and the pro-inflammatory cytokine milieu have been shown to play important roles in the induction of effector cytokines in Tregs. Here we review the mechanisms of development and the possible functions of pro-inflammatory cytokine producing Foxp3+ Tregs.
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Affiliation(s)
- Pushpa Pandiyan
- Department of Biological Sciences, School of Dental Medicine, Case Western Reserve University, Cleveland, OH 44106, USA.
| | - Jinfang Zhu
- Molecular and Cellular Immunoregulation Unit, Laboratory of Immunology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
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Bhaskaran N, Cohen S, Zhang Y, Weinberg A, Pandiyan P. TLR-2 Signaling Promotes IL-17A Production in CD4+CD25+Foxp3+ Regulatory Cells during Oropharyngeal Candidiasis. Pathogens 2015; 4:90-110. [PMID: 25790134 PMCID: PMC4384074 DOI: 10.3390/pathogens4010090] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2015] [Revised: 03/05/2015] [Accepted: 03/11/2015] [Indexed: 12/17/2022] Open
Abstract
Recent studies show that CD4+CD25+Foxp3+ regulatory cells (Tregs) produce effector cytokines under inflammatory conditions. However, the direct role of microbial agents that serve as toll-like receptor (TLR) ligands in the induction of effector cytokines in Tregs is less clear. Here we show that CD4+Foxp3+Tregs produce the effector cytokine IL-17A during oropharyngeal candidiasis (OPC) and inflammatory bowel disease in a TLR-2/Myd88 signaling dependent manner. TLR-2 ligands promote proliferation in Tregs in the presence and absence of TCR signals and inflammatory cytokines in vitro. The proliferation is directly dependent on TLR-2 expression in Tregs. Consistent with this, Tlr2−/− mice harbor fewer thymically derived Tregs and peripheral Tregs under homeostatic conditions in vivo. However, under Th17 inducing conditions, IL-6 and TLR-2 signaling both in Tregs as well as antigen presenting cells (APC) are critical for maximal ROR-γt and IL-17A up-regulation in Foxp3+ Tregs. The minimal and transient loss of Foxp3 expression and suppressive properties are due to the presence of IL-6 in the milieu, but not the direct effect of TLR-2 signaling in Tregs. Taken together, our data reveal that TLR-2 signaling promotes not only proliferation, but also IL-17A in Tregs, depending on the cytokine milieu. These IL-17A producing Tregs may be relevant in mucosal infections and inflammation.
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Affiliation(s)
- Natarajan Bhaskaran
- Department of Biological Sciences, School of Dental Medicine, Case Western Reserve University, Cleveland, OH 44106, USA.
| | - Samuel Cohen
- Department of Biological Sciences, School of Dental Medicine, Case Western Reserve University, Cleveland, OH 44106, USA.
| | - Yifan Zhang
- Department of Biological Sciences, School of Dental Medicine, Case Western Reserve University, Cleveland, OH 44106, USA.
| | - Aaron Weinberg
- Department of Biological Sciences, School of Dental Medicine, Case Western Reserve University, Cleveland, OH 44106, USA.
| | - Pushpa Pandiyan
- Department of Biological Sciences, School of Dental Medicine, Case Western Reserve University, Cleveland, OH 44106, USA.
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de Meis J, Barreto de Albuquerque J, Silva Dos Santos D, Farias-de-Oliveira DA, Berbert LR, Cotta-de-Almeida V, Savino W. Trypanosoma cruzi Entrance through Systemic or Mucosal Infection Sites Differentially Modulates Regional Immune Response Following Acute Infection in Mice. Front Immunol 2013; 4:216. [PMID: 23898334 PMCID: PMC3724200 DOI: 10.3389/fimmu.2013.00216] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2013] [Accepted: 07/13/2013] [Indexed: 12/11/2022] Open
Abstract
Acute Chagas disease is characterized by a systemic infection that leads to the strong activation of the adaptive immune response. Outbreaks of oral contamination by the infective protozoan Trypanosoma cruzi are frequent in Brazil and other Latin American countries, and an increased severity of clinical manifestations and mortality is observed in infected patients. These findings have elicited questions about the specific responses triggered after T. cruzi entry via mucosal sites, possibly modulating local immune mechanisms, and further impacting regional and systemic immunity. Here, we provide evidence for the existence of differential lymphoid organ responses in experimental models of acute T. cruzi infection.
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Affiliation(s)
- Juliana de Meis
- Laboratory of Thymus Research, Oswaldo Cruz Institute, Oswaldo Cruz Foundation , Rio de Janeiro , Brazil
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Chaurio R, Janko C, Schorn C, Maueröder C, Bilyy R, Gaipl U, Schett G, Berens C, Frey B, Munoz LE. UVB-irradiated apoptotic cells induce accelerated growth of co-implanted viable tumor cells in immune competent mice. Autoimmunity 2013. [DOI: 10.3109/08916934.2012.754433] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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Soond DR, Slack ECM, Garden OA, Patton DT, Okkenhaug K. Does the PI3K pathway promote or antagonize regulatory T cell development and function? Front Immunol 2012; 3:244. [PMID: 22912633 PMCID: PMC3418637 DOI: 10.3389/fimmu.2012.00244] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2012] [Accepted: 07/23/2012] [Indexed: 11/23/2022] Open
Abstract
Regulatory T cells (Tregs) prevent autoimmunity and inflammation by suppressing the activation of other T cells and antigen presenting cells. The role of phosphoinositide 3-kinase (PI3K) signaling in Treg is controversial. Some studies suggest that inhibition of the PI3K pathway is essential for the development of Tregs whereas other studies have shown reduced Treg numbers and function when PI3K activity is suppressed. Here we attempt to reconcile the different studies that have explored PI3K and the downstream effectors Akt, Foxo, and mTOR in regulatory T cell development and function and discuss the implications for health and therapeutic intervention.
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Affiliation(s)
- Dalya R Soond
- Laboratory of Lymphocyte Signalling and Development, Babraham Institute Cambridge, UK
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Ohta A, Kini R, Ohta A, Subramanian M, Madasu M, Sitkovsky M. The development and immunosuppressive functions of CD4(+) CD25(+) FoxP3(+) regulatory T cells are under influence of the adenosine-A2A adenosine receptor pathway. Front Immunol 2012; 3:190. [PMID: 22783261 PMCID: PMC3389649 DOI: 10.3389/fimmu.2012.00190] [Citation(s) in RCA: 300] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2012] [Accepted: 06/18/2012] [Indexed: 11/24/2022] Open
Abstract
The A2A adenosine receptor (A2AR)-mediated immunosuppression is firmly implicated in the life-saving down-regulation of collateral tissue damage during the anti-pathogen immune response and in highly undesirable protection of cancerous tissues during anti-tumor immune response. Therefore, depending on specific clinical situation there is a need to either weaken or strengthen the intensity of A2AR signal. While the A2AR-mediated immunosuppression was shown to be T cell autonomous in studies of effector T cells, it was not clear how A2AR stimulation affects regulatory T cells (Treg). Here we show in parallel assays that while A2AR stimulation on T cells directly inhibits their activation, there is also indirect and longer-lasting T cell inhibitory effect through modulation of Treg. A2AR stimulation expanded CD4+ CD25hi FoxP3+ cells, which also express CD39, CD73, and CTLA-4. Treg cultured with A2AR agonist showed increased expression of CTLA-4 and stronger immunosuppressive activity. There was a significant increase of Treg cell number after A2AR stimulation. The CD4+ FoxP3+ population contained those induced from CD4+ CD25− cells, but CD4+ FoxP3+ cells predominantly derived from CD4+ CD25+ natural Treg. Thus, A2AR stimulation numerically and functionally enhanced Treg-mediated immunosuppressive mechanism. These data suggest that the A2AR-mediated stimulation of lymphocytes using A2AR agonists should be considered in protocols for ex vivo expansion of Treg before the transfer to patients in different medical applications.
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Affiliation(s)
- Akio Ohta
- New England Inflammation and Tissue Protection Institute, Northeastern University, Boston MA, USA
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