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Zhao L, Yang X. Cross Talk Between Natural Killer T and Dendritic Cells and Its Impact on T Cell Responses in Infections. Front Immunol 2022; 13:837767. [PMID: 35185930 PMCID: PMC8850912 DOI: 10.3389/fimmu.2022.837767] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Accepted: 01/19/2022] [Indexed: 11/16/2022] Open
Abstract
Both innate and adaptive immunity is vital for host defense against infections. Dendritic cells (DCs) are critical for initiating and modulating adaptive immunity, especially for T-cell responses. Natural killer T (NKT) cells are a small population of innate-like T cells distributed in multiple organs. Many studies have suggested that the cross-talk between these two immune cells is critical for immunobiology and host defense mechanisms. Not only can DCs influence the activation/function of NKT cells, but NKT cells can feedback on DCs also, thus modulating the phenotype and function of DCs and DC subsets. This functional feedback of NKT cells on DCs, especially the preferential promoting effect on CD8α+ and CD103+ DC subsets in lymphoid and non-lymphoid tissues, significantly impacts the systemic and local adaptive CD4 and CD8 T cell responses in infections. This review focuses on the two-way interaction between NKT cells and DCs, emphasizing the importance of NKT cell feedback on DCs in bridging innate and adaptive immune responses for host defense purposes.
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Affiliation(s)
- Lei Zhao
- Departments of Immunology and Medical Microbiology and Infectious Diseases, Max Rady College of Medicine, University of Manitoba, Winnipeg, MB, Canada.,Laboratory of Basic Medical Science, Qilu Hospital of Shandong University, Jinan, China
| | - Xi Yang
- Departments of Immunology and Medical Microbiology and Infectious Diseases, Max Rady College of Medicine, University of Manitoba, Winnipeg, MB, Canada
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2
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Wang Y, Yu Z, Zhou Y, Zhu Y, Wang J, Fu J, Yuan Y, Chen S, Wang Y, Yu W, Gao P, Zhu W, Cheng Q, Cho SH, Kong W, Chen J. Different doses of ovalbumin exposure on dendritic cells determine their genetic/epigenetic regulation and T cell differentiation. Aging (Albany NY) 2020; 12:25432-25451. [PMID: 33234726 PMCID: PMC7803576 DOI: 10.18632/aging.104145] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Accepted: 09/09/2020] [Indexed: 12/14/2022]
Abstract
It has been reported that allergen dosage can impact the differentiation of dendritic cells (DCs)-mediated T cells. However, the mechanisms of such dose-dependent differentiation are poorly understood. In this study, bone marrow-derived immature DCs stimulated with Ovalbumin (OVA) of different concentrations (0, 10, 100, 1000, 10000μg/ml, respectively). DCs were then co-cultured with naïve T cells. RNA-sequencing detection and DNA methylation of DCs were performed. We show that when DCs were stimulated with low-dose (10μg/ml), 77 genes were up-regulated and 87 genes down-regulated. Most activated genes were related to ribosome synthesis and ion channel inhibition. At the medium-dose (100μg/ml), 339 genes were up-regulated and 168 genes down-regulated. Most activated genes involved cytokine synthesis and regulation of immune responses. At high-dose (10000μg/ml), 2497 genes were up-regulated and 1156 genes down-regulated. TNF signaling pathway, NF-kappa B signaling pathway, antigen processing and presentation signaling pathway were mostly up-regulated. The related co-stimulators, co-inhibitory molecules, inhibitory cytokines, negative regulating enzymes were highly expressed. The monocarbate, coenzyme, fatty acid, glucolipid, starch, sucrose and other metabolism-related signaling pathways were down-regulated. The profiles of DNA methylation and RNA synthesis of DCs varied with different doses of OVA, which serves to induce T cells to differentiate in various directions.
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Affiliation(s)
- Ying Wang
- Department of Otorhinolaryngology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Zizhong Yu
- Department of Otorhinolaryngology, Taihe Hospital, Hubei University of Medicine, Wuhan, China
| | - Yue Zhou
- Department of Otorhinolaryngology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yun Zhu
- Department of Otorhinolaryngology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jinhui Wang
- Department of Otorhinolaryngology, First Hospital of Handan, Wuhan, China
| | - Junmei Fu
- Department of Otorhinolaryngology, First People’s Hospital of Jiangxia District, Wuhan, China
| | - Yang Yuan
- Department of Otorhinolaryngology, Wuhan General Hospital of the Chinese People’s Liberation Army, Wuhan, China
| | - Shan Chen
- Department of Otorhinolaryngology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yanjun Wang
- Department of Otorhinolaryngology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Wenting Yu
- Department of Otorhinolaryngology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Pei Gao
- Department of Otorhinolaryngology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Wanting Zhu
- Department of Otorhinolaryngology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Qing Cheng
- Department of Otorhinolaryngology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Seong H Cho
- Division of Allergy-Immunology, Department of Internal Medicine, Morsani College of Medicine, University of South Florida, Tampa, FL 33612, USA
| | - Weijia Kong
- Department of Otorhinolaryngology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jianjun Chen
- Department of Otorhinolaryngology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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3
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Ma L, Zhang Q, Hao J, Wang J, Wang C. LncRNA PVT1 exacerbates the inflammation and cell-barrier injury during asthma by regulating miR-149. J Biochem Mol Toxicol 2020; 34:e22563. [PMID: 32830409 DOI: 10.1002/jbt.22563] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Revised: 05/19/2020] [Accepted: 06/17/2020] [Indexed: 01/07/2023]
Abstract
BACKGROUND Asthma is a prevailing respiratory disease among children, characterized by allergic airway inflammation, airway remodeling, and airway hyperresponsiveness. Although it is well-known that long non-coding RNAs (lncRNAs) are linked to a variety of human diseases and well-documented, very few studies explore its role in asthma. In this study, we investigate the effects of lncRNA PVT1 on the promotion of airway inflammation and its associated mechanisms. METHODS AND MATERIALS Human small airway epithelial cells (HSAECs) with PVT1 overexpressed or knocked down were constructed, and platelet activating factor (PAF) was used to treat HSAECs to mimic the pathological process of asthma in vitro. The expressions of prostaglandin E2 (PGE2), interleukin-1β (IL-1β), IL-6, and tumor necrosis factor-α (TNF-α) were measured by enzyme-linked immunosorbent assay (ELISA). The expressions of PKC, MyD88, and NF-ĸB were measured by Western blot. Monolayer permeability of HSAECs was also compared within different groups. Luciferase reporter gene assay was employed to detect the targeting relationship between PVT1 and miR-149. RESULTS The knockdown of PVT1 attenuated the levels of inflammatory factors induced by PAF and destruction of cell-barrier function. The overexpression of PVT1 facilitated the pathological development. Additionally, miR-149 was identified as a target microRNA of PVT1, and the overexpression of miR-149 could reverse the effects of PVT1 on PAF-induced HSAECs. CONCLUSION These findings suggest that PVT1 may represent a novel potential target for treatment of asthma.
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Affiliation(s)
- Lianmei Ma
- Department of Pediatrics, Binzhou Medical University Hospital, Binzhou, Shandong, China
| | - Qian Zhang
- Department of Pediatrics, Heze Municiple Hosptial, Heze, Shandong, China
| | - Jinping Hao
- Department of Pediatrics, Heze Municiple Hosptial, Heze, Shandong, China
| | - Jianqiang Wang
- Department of General Surgery I, The People's Hospital of Binzhou, Binzhou, Shandong, China
| | - Chunjian Wang
- Department of Medicine, Binzhou Medical University Hospital, Binzhou, Shandong, China
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Leishmania proteophosphoglycans regurgitated from infected sand flies accelerate dermal wound repair and exacerbate leishmaniasis via insulin-like growth factor 1-dependent signalling. PLoS Pathog 2018; 14:e1006794. [PMID: 29352310 PMCID: PMC5792026 DOI: 10.1371/journal.ppat.1006794] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Revised: 01/31/2018] [Accepted: 12/07/2017] [Indexed: 12/14/2022] Open
Abstract
Leishmania parasites are transmitted to vertebrate hosts by female phlebotomine sand flies as they bloodfeed by lacerating the upper capillaries of the dermis with their barbed mouthparts. In the sand fly midgut secreted proteophosphoglycans from Leishmania form a biological plug known as the promastigote secretory gel (PSG), which blocks the gut and facilitates the regurgitation of infective parasites. The interaction between the wound created by the sand fly bite and PSG is not known. Here we nanoinjected a sand fly egested dose of PSG into BALB/c mouse skin that lead to the differential expression of 7,907 transcripts. These transcripts were transiently up-regulated during the first 6 hours post-wound and enriched for pathways involved in inflammation, cell proliferation, fibrosis, epithelial cell differentiation and wound remodelling. We found that PSG significantly accelerated wound healing in vitro and in mice; which was associated with an early up-regulation of transcripts involved in inflammation (IL-1β, IL-6, IL-10, TNFα) and inflammatory cell recruitment (CCL2, CCL3, CCL4, CXCL2), followed 6 days later by enhanced expression of transcripts associated with epithelial cell proliferation, fibroplasia and fibrosis (FGFR2, EGF, EGFR, IGF1). Dermal expression of IGF1 was enhanced following an infected sand fly bite and was acutely responsive to the deposition of PSG but not the inoculation of parasites or sand fly saliva. Antibody blockade of IGF1 ablated the gel’s ability to promote wound closure in mouse ears and significantly reduced the virulence of Leishmania mexicana infection delivered by an individual sand fly bite. Dermal macrophages recruited to air-pouches on the backs of mice revealed that IGF1 was pivotal to the PSG’s ability to promote macrophage alternative activation and Leishmania infection. Our data demonstrate that through the regurgitation of PSG Leishmania exploit the wound healing response of the host to the vector bite by promoting the action of IGF1 to drive the alternative activation of macrophages. Female phlebotomine sand flies efficiently transmit Leishmania parasites, yet the underlying mechanisms remain poorly understood. During transmission, promastigote secretory gel (PSG) regurgitated from the blocked sand fly gut promote Leishmania infection and exacerbates disease. Here we investigate mouse ear-skin response to PSG and find that a significant proportion of up-regulated transcripts are involved in wound healing. Following a wound to skin preconditioned with PSG, key transcripts associated with inflammation and cell recruitment were enhanced by 4 hours and those associated with epithelial cell differentiation, proliferation and fibrosis were enhanced in the late phase of wound healing; including insulin growth factor-1 (IGF1) and its receptor. The presence of PSG significantly accelerated wound closure in vitro and in vivo, and this was directed by the presence of IGF1. IGF1 was essential to both the wound healing and disease-exacerbating properties of PSG, arising from its ability to alternatively activate macrophages. IGF1-blockade efficiently reduced the virulence of Leishmania infection from sand fly bite transmission indicating that it is essential to the function of PSG during natural infection. Our findings open the dual possibility of exploiting PSG, or defined components thereof, as a novel wound healing therapy and provide new targets for anti-leishmanial therapeutic design.
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5
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Lutz MB, Strobl H, Schuler G, Romani N. GM-CSF Monocyte-Derived Cells and Langerhans Cells As Part of the Dendritic Cell Family. Front Immunol 2017; 8:1388. [PMID: 29109731 PMCID: PMC5660299 DOI: 10.3389/fimmu.2017.01388] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Accepted: 10/09/2017] [Indexed: 12/21/2022] Open
Abstract
Dendritic cells (DCs) and macrophages (Mph) share many characteristics as components of the innate immune system. The criteria to classify the multitude of subsets within the mononuclear phagocyte system are currently phenotype, ontogeny, transcription patterns, epigenetic adaptations, and function. More recently, ontogenetic, transcriptional, and proteomic research approaches uncovered major developmental differences between Flt3L-dependent conventional DCs as compared with Mphs and monocyte-derived DCs (MoDCs), the latter mainly generated in vitro from murine bone marrow-derived DCs (BM-DCs) or human CD14+ peripheral blood monocytes. Conversely, in vitro GM-CSF-dependent monocyte-derived Mphs largely resemble MoDCs whereas tissue-resident Mphs show a common embryonic origin from yolk sac and fetal liver with Langerhans cells (LCs). The novel ontogenetic findings opened discussions on the terminology of DCs versus Mphs. Here, we bring forward arguments to facilitate definitions of BM-DCs, MoDCs, and LCs. We propose a group model of terminology for all DC subsets that attempts to encompass both ontogeny and function.
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Affiliation(s)
- Manfred B Lutz
- Institute for Virology and Immunobiology, University of Würzburg, Würzburg, Germany
| | - Herbert Strobl
- Institute of Pathophysiology and Immunology, Medical University of Graz, Graz, Austria
| | - Gerold Schuler
- Department of Dermatology, University Hospital Erlangen, Erlangen, Germany
| | - Nikolaus Romani
- Department of Dermatology, Venereology and Allergology, Medical University of Innsbruck, Innsbruck, Austria
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Ramachandran M, Dimberg A, Essand M. The cancer-immunity cycle as rational design for synthetic cancer drugs: Novel DC vaccines and CAR T-cells. Semin Cancer Biol 2017; 45:23-35. [DOI: 10.1016/j.semcancer.2017.02.010] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2016] [Accepted: 02/26/2017] [Indexed: 01/18/2023]
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7
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Cvetkovic J, Sofronic-Milosavljevic L, Ilic N, Gnjatovic M, Nagano I, Gruden-Movsesijan A. Immunomodulatory potential of particular Trichinella spiralis muscle larvae excretory–secretory components. Int J Parasitol 2016; 46:833-842. [DOI: 10.1016/j.ijpara.2016.07.008] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2016] [Revised: 07/28/2016] [Accepted: 07/29/2016] [Indexed: 12/16/2022]
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Abstract
Diseases caused by Leishmania present a worldwide problem, and current therapeutic approaches are unable to achieve a sterile cure. Leishmania is able to persist in host cells by evading or exploiting host immune mechanisms. A thorough understanding of these mechanisms could lead to better strategies for effective management of Leishmania infections. Current research has focused on parasite modification of host cell signaling pathways, entry into phagocytic cells, and modulation of cytokine and chemokine profiles that alter immune cell activation and trafficking to sites of infection. Immuno-therapeutic approaches that target these mechanisms of immune evasion by Leishmania offer promising areas for preclinical and clinical research.
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Markikou-Ouni W, Drini S, Bahi-Jaber N, Chenik M, Meddeb-Garnaoui A. Immunomodulatory Effects of Four Leishmania infantum Potentially Excreted/Secreted Proteins on Human Dendritic Cells Differentiation and Maturation. PLoS One 2015; 10:e0143063. [PMID: 26581100 PMCID: PMC4651425 DOI: 10.1371/journal.pone.0143063] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2015] [Accepted: 10/07/2015] [Indexed: 11/18/2022] Open
Abstract
Leishmania parasites and some molecules they secrete are known to modulate innate immune responses through effects on dendritic cells (DCs) and macrophages. Here, we characterized four Leishmania infantum potentially excreted/secreted recombinant proteins (LipESP) identified in our laboratory: Elongation Factor 1 alpha (LiEF-1α), a proteasome regulatory ATPase (LiAAA-ATPase) and two novel proteins with unknown functions, which we termed LiP15 and LiP23, by investigating their effect on in vitro differentiation and maturation of human DCs and on cytokine production by DCs and monocytes. During DCs differentiation, LipESP led to a significant decrease in CD1a. LiP23 and LiEF-1α, induced a decrease of HLA-DR and an increase of CD86 surface expression, respectively. During maturation, an up-regulation of HLA-DR and CD80 was found in response to LiP15, LiP23 and LiAAA-ATPase, while an increase of CD40 expression was only observed in response to LiP15. All LipESP induced an over-expression of CD86 with significant differences between proteins. These proteins also induced significant IL-12p70 levels in immature DCs but not in monocytes. The LipESP-induced IL-12p70 production was significantly enhanced by a co-treatment with IFN-γ in both cell populations. TNF-α and IL-10 were induced in DCs and monocytes with higher levels observed for LiP15 and LiAAA-ATPase. However, LPS-induced cytokine production during DC maturation or in monocyte cultures was significantly down regulated by LipESP co-treatment. Our findings suggest that LipESP strongly interfere with DCs differentiation suggesting a possible involvement in mechanisms established by the parasite for its survival. These proteins also induce DCs maturation by up-regulating several costimulatory molecules and by inducing the production of proinflammatory cytokines, which is a prerequisite for T cell activation. However, the reduced ability of LipESP-stimulated DCs and monocytes to respond to lipopolysaccharide (LPS) that can be observed during human leishmaniasis, suggests that under certain circumstances LipESP may play a role in disease progression.
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Affiliation(s)
- Wafa Markikou-Ouni
- Laboratory of Medical Parasitology, Biotechnology and Biomolecules, Institut Pasteur de Tunis, Tunis, Tunisia
| | - Sima Drini
- Laboratory of Medical Parasitology, Biotechnology and Biomolecules, Institut Pasteur de Tunis, Tunis, Tunisia
- Unité de Parasitologie moléculaire et Signalisation, Institut Pasteur, Paris, France
| | - Narges Bahi-Jaber
- Laboratory of Medical Parasitology, Biotechnology and Biomolecules, Institut Pasteur de Tunis, Tunis, Tunisia
- UPSP EGEAL Institut Polytechnique LaSalle Beauvais, Beauvais, France
| | - Mehdi Chenik
- Laboratory of Medical Parasitology, Biotechnology and Biomolecules, Institut Pasteur de Tunis, Tunis, Tunisia
| | - Amel Meddeb-Garnaoui
- Laboratory of Medical Parasitology, Biotechnology and Biomolecules, Institut Pasteur de Tunis, Tunis, Tunisia
- * E-mail:
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10
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Nouri-Shirazi M, Kahlden C, Nishino P, Guinet E. Nicotine exposure alters the mRNA expression of Notch ligands in dendritic cells and their response to Th1-/Th2-promoting stimuli. Scand J Immunol 2015; 81:110-20. [PMID: 25418282 DOI: 10.1111/sji.12254] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2014] [Accepted: 11/03/2014] [Indexed: 12/26/2022]
Abstract
Dendritic cells (DCs) utilize polarizing signals to instruct the differentiation of T helper (Th) cells into Th1 and Th2 effector cells: antigen-specific 'signal 1', costimulatory 'signal 2' and polarizing cytokines 'signal 3'. Accumulating evidence suggests the involvement of an additional signal, the Notch signalling pathway. We reported that in response to Th1-promoting stimuli, both mouse and human DCs generated in the presence of the immune modulator nicotine (nicDCs) fail to support the development of effector memory Th1 cells. However, in response to Th2-promoting stimuli, these nicDCs preferentially support the differentiation of antigen-specific IL-4-producing Th2 effector cells. Here, we show that when compared to their control counterparts, immature mouse and human nicDCs display higher levels of the Notch ligands D1, D4 and J2 mRNA expression. In response to Th1- and Th2-promoting stimuli, mouse nicDCs display higher levels of the Notch ligands D1, D4 and J2, while human nicDCs show higher levels of D1, D4 and J1 mRNA expression. Furthermore, both stimulated mouse and human nicDCs express higher CD86 to CD80 ratio and produce lower amount of IL-12. Collectively, our data suggest that these changes in addition to an increase in Jagged expression correlate with the ability of nicDCs to modulate the Th1/Th2 balance in favour of Th2 generation.
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Affiliation(s)
- M Nouri-Shirazi
- Integrated Medical Science Department, Florida Atlantic University, Charles E. Schmidt College of Medicine, Boca Raton, FL, USA and
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Nie H, Yang Q, Zhang G, Wang A, He Q, Liu M, Li P, Yang J, Huang Y, Ding X, Yu H, Hu S. Invariant NKT cells act as an adjuvant to enhance Th2 inflammatory response in an OVA-induced mouse model of asthma. PLoS One 2015; 10:e0119901. [PMID: 25830340 PMCID: PMC4382159 DOI: 10.1371/journal.pone.0119901] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2014] [Accepted: 01/06/2015] [Indexed: 11/21/2022] Open
Abstract
Background Invariant natural killer T cells (iNKT cells) are a unique subset of T lymphocytes and are considered to play an important role in the development of allergic bronchial asthma. Recently, iNKT cells were shown to play an immunoregulatory role in CD4+ and CD8+ T cell-mediated adaptive immune response. Allergen-specific Th2 inflammatory responses are an important part of the adaptive immune response in asthma. However, the regulatory functions of the Th2 inflammatory response in asthma have not been studied in detail. Method In this study, we have investigated the regulatory functions of iNKT cells on the Th2 inflammatory response in an ovalbumin (OVA)-induced murine model of asthma. Results Our results demonstrate that α-Galactosylceramide (α-GalCer) administration activated iNKT cells but could not induce the Th2 inflammatory response in wild-type (WT) mice. In the OVA-induced asthma model, α-GalCer administration and adoptive transfer of iNKT cells significantly augmented the Th2 inflammatory responses, including elevated inflammatory cell infiltration in the lung and bronchoalveolar lavage fluid (BALF); increased levels of IL-4, IL-5, and IL-13 in the BALF and splenocyte culture supernatant; and increased serum levels of OVA-specific IgE and IgG1. In addition, the Th2 inflammatory response was reduced, but not completely abrogated in CD1d-/- mice immunized and challenged with OVA, compared with WT mice. Conclusion These results suggest that iNKT cells may serve as an adjuvant to enhance Th2 inflammatory response in an OVA-induced murine model of asthma.
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Affiliation(s)
- Hanxiang Nie
- Department of Respiratory Medicine, Renmin Hospital of Wuhan University, Wuhan, China
- * E-mail:
| | - Qiaoyu Yang
- Department of Respiratory Medicine, Renmin Hospital of Wuhan University, Wuhan, China
| | - Guqin Zhang
- Department of Respiratory Medicine, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Ailing Wang
- Wuhan University HOPE School of nursing, Wuhan, China
| | - Qing He
- Department of Respiratory Medicine, Renmin Hospital of Wuhan University, Wuhan, China
| | - Min Liu
- Department of Respiratory Medicine, Renmin Hospital of Wuhan University, Wuhan, China
| | - Ping Li
- Department of Respiratory Medicine, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Jiong Yang
- Department of Respiratory Medicine, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Yi Huang
- Department of Respiratory Medicine, Renmin Hospital of Wuhan University, Wuhan, China
| | - Xuhong Ding
- Department of Respiratory Medicine, Renmin Hospital of Wuhan University, Wuhan, China
| | - Hongying Yu
- Department of Respiratory Medicine, Renmin Hospital of Wuhan University, Wuhan, China
| | - Suping Hu
- Department of Respiratory Medicine, Renmin Hospital of Wuhan University, Wuhan, China
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Lysophosphatidylcholine exacerbates Leishmania major-dendritic cell infection through interleukin-10 and a burst in arginase1 and indoleamine 2,3-dioxygenase activities. Int Immunopharmacol 2015; 25:1-9. [DOI: 10.1016/j.intimp.2015.01.006] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2014] [Revised: 01/01/2015] [Accepted: 01/06/2015] [Indexed: 02/08/2023]
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13
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Zimara N, Florian C, Schmid M, Malissen B, Kissenpfennig A, Männel DN, Edinger M, Hutchinson JA, Hoffmann P, Ritter U. Langerhans cells promote early germinal center formation in response toLeishmania-derived cutaneous antigens. Eur J Immunol 2014; 44:2955-67. [DOI: 10.1002/eji.201344263] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2013] [Revised: 05/30/2014] [Accepted: 07/25/2014] [Indexed: 12/27/2022]
Affiliation(s)
- Nicole Zimara
- Institute of Immunology; University of Regensburg; Regensburg Germany
| | - Christian Florian
- Institute of Immunology; University of Regensburg; Regensburg Germany
| | - Maximilian Schmid
- Institute of Immunology; University of Regensburg; Regensburg Germany
| | - Bernard Malissen
- Centre d'Immunologie de Marseille-Luminy; Institut National de la Santé et de la Recherche Médicale U1104; Centre National de la Recherche Scientifique Unité Mixte de Recherche; Aix Marseille Université; Marseille France
| | - Adrien Kissenpfennig
- Centre for Infection and Immunity; School of Medicine; Dentistry & Biomedical Sciences; Queens University; Belfast UK
| | - Daniela N. Männel
- Institute of Immunology; University of Regensburg; Regensburg Germany
| | - Matthias Edinger
- Internal Medicine III; University Hospital Regensburg; Regensburg Germany
| | - James A. Hutchinson
- Laboratory for Transplantation Research; Department of Surgery; University Hospital Regensburg; Regensburg Germany
| | - Petra Hoffmann
- Internal Medicine III; University Hospital Regensburg; Regensburg Germany
| | - Uwe Ritter
- Institute of Immunology; University of Regensburg; Regensburg Germany
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Mayer A, Debuisson D, Denanglaire S, Eddahri F, Fievez L, Hercor M, Triffaux E, Moser M, Bureau F, Leo O, Andris F. Antigen presenting cell-derived IL-6 restricts Th2-cell differentiation. Eur J Immunol 2014; 44:3252-62. [PMID: 25092208 DOI: 10.1002/eji.201444646] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2014] [Revised: 06/23/2014] [Accepted: 07/31/2014] [Indexed: 11/09/2022]
Abstract
The identification of DC-derived signals orchestrating activation of Th1 and Th17 immune responses has advanced our understanding on how these inflammatory responses develop. However, whether specific signals delivered by DCs also participate in the regulation of Th2 immune responses remains largely unknown. In this study, we show that administration of antigen-loaded, IL-6-deficient DCs to naïve mice induced an exacerbated Th2 response, characterized by the differentiation of GATA-3-expressing T lymphocytes secreting high levels of IL-4, IL-5, and IL-13. Coinjection of wild type and IL-6-deficient bone marrow-derived dendritic cells (BMDCs) confirmed that IL-6 exerted a dominant, negative influence on Th2-cell development. This finding was confirmed in vitro, where exogenously added IL-6 was found to limit IL-4-induced Th2-cell differentiation. iNKT cells were required for optimal Th2-cell differentiation in vivo although their activation occurred independently of IL-6 secretion by the BMDCs. Collectively, these observations identify IL-6 secretion as a major, unsuspected, mechanism whereby DCs control the magnitude of Th2 immunity.
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Affiliation(s)
- Alice Mayer
- Laboratoire d'Immunobiologie, Institut de Biologie et de Médecine Moléculaire, Université Libre de Bruxelles, Gosselies, Belgium
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Griewank KG, Lorenz B, Fischer MR, Boon L, Lopez Kostka S, von Stebut E. Immune modulating effects of NKT cells in a physiologically low dose Leishmania major infection model after αGalCer analog PBS57 stimulation. PLoS Negl Trop Dis 2014; 8:e2917. [PMID: 24967701 PMCID: PMC4072590 DOI: 10.1371/journal.pntd.0002917] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2013] [Accepted: 04/17/2014] [Indexed: 11/18/2022] Open
Abstract
Leishmaniasis is a parasitic infection affecting ∼12 million people worldwide, mostly in developing countries. Treatment options are limited and no effective vaccines exist to date. Natural Killer T (NKT) cells are a conserved innate-like lymphocyte population with immunomodulating effects in various settings. A number of reports state a role of NKT cells in different models of Leishmania infection. Here, we investigated the effect of NKT cells in a physiologically relevant, intradermal low dose infection model. After inoculation of 103 infectious-stage L. major, comparable numbers of skin-immigrating NKT cells in both susceptible BALB/c mice and resistant C57BL/6 mice were noted. Compared to their wild type counterparts, NKT cell-deficient mice on a C57BL/6 background were better able to contain infection with L. major and showed decreased IL-4 production in cytokine analysis performed 5 and 8 weeks after infection. Low doses of the NKT cell stimulating αGalCer analog PBS57 applied at the time of infection led to disease exacerbation in C57BL/6 wild-type, but not NKT-deficient mice. The effect was dependent both on the timing and amount of PBS57 administered. The effect of NKT cell stimulation by PBS57 proved to be IL-4 dependent, as it was neutralized in IL-4-deficient C57BL/6 or anti-IL-4 antibody-treated wild-type mice. In contrast to C57BL/6 mice, administration of PBS57 in susceptible BALB/c mice resulted in an improved course of disease. Our results reveal a strain- and cytokine-dependent regulatory role of NKT cells in the development of immunity to low dose L. major infections. These effects, probably masked in previous studies using higher parasite inocula, should be considered in future therapy and immunization approaches. Cutaneous leishmaniasis is a disease affecting about 12 million people worldwide. It is transmitted by a sand fly and primarily affects people in developing countries. To date there are no effective vaccines. Many of the treatments available have serious side effects and resistance mechanisms are becoming an increasingly prevalent problem. Natural killer T (NKT) cells are a unique T cell population recognizing glycolipids. Their role in immune processes, especially in infectious diseases, is incompletely understood. In the current study, we investigated the role of NKT cells in Leishmania infections in detail. We found that NKT cells can significantly alter the development of immunity, however in different directions depending on the host's genetic background. Their natural effect on infection can be increased when applying the stimulating antigen alpha-Galactosyl-Ceramide (αGalCer) or its analogs (in our study PBS57). Our results show that the effect of these cells in resistant mice (which are generally reminiscent of the situation in humans) is largely mediated by cytokine secretion, in particular IL-4, a Th2 cytokine. We conclude that NKT cells influence the course of Leishmania infection and that therapeutically modulating their function could be beneficial both to treat existing infections, as well as potentially develop desperately needed, effective vaccines.
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Affiliation(s)
- Klaus G. Griewank
- Department of Dermatology, University Medical Center, Johannes Gutenberg-University, Mainz, Germany
- Department of Dermatology, University Duisburg-Essen, University Hospital Essen, Essen, Germany
| | - Beate Lorenz
- Department of Dermatology, University Medical Center, Johannes Gutenberg-University, Mainz, Germany
| | - Michael R. Fischer
- Department of Dermatology, University Medical Center, Johannes Gutenberg-University, Mainz, Germany
| | | | - Susanna Lopez Kostka
- Department of Dermatology, University Medical Center, Johannes Gutenberg-University, Mainz, Germany
| | - Esther von Stebut
- Department of Dermatology, University Medical Center, Johannes Gutenberg-University, Mainz, Germany
- * E-mail:
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Li W, Holsinger RMD, Kruse CA, Flügel A, Graeber MB. The potential for genetically altered microglia to influence glioma treatment. CNS & NEUROLOGICAL DISORDERS-DRUG TARGETS 2014; 12:750-62. [PMID: 24047526 DOI: 10.2174/18715273113126660171] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2012] [Revised: 12/06/2012] [Accepted: 12/06/2012] [Indexed: 01/06/2023]
Abstract
Diffuse and unstoppable infiltration of brain and spinal cord tissue by neoplastic glial cells is the single most important therapeutic problem posed by the common glioma group of tumors: astrocytoma, oligoastrocytoma, oligodendroglioma, their malignant variants and glioblastoma. These neoplasms account for more than two thirds of all malignant central nervous system tumors. However, most glioma research focuses on an examination of the tumor cells rather than on host-specific, tumor micro-environmental cells and factors. This can explain why existing diffuse glioma therapies fail and why these tumors have remained incurable. Thus, there is a great need for innovation. We describe a novel strategy for the development of a more effective treatment of diffuse glioma. Our approach centers on gaining control over the behavior of the microglia, the defense cells of the CNS, which are manipulated by malignant glioma and support its growth. Armoring microglia against the influences from glioma is one of our research goals. We further discuss how microglia precursors may be genetically enhanced to track down infiltrating glioma cells.
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Affiliation(s)
- W Li
- Brain and Mind Research Institute, The University of Sydney, Camperdown, NSW, Australia.
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17
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Heuer M, Behlich AS, Lee JS, Ribechini E, Jo EK, Lutz MB. The 30-kDa and 38-kDa antigens from Mycobacterium tuberculosis induce partial maturation of human dendritic cells shifting CD4(+) T cell responses towards IL-4 production. BMC Immunol 2013; 14:48. [PMID: 24089996 PMCID: PMC3852591 DOI: 10.1186/1471-2172-14-48] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2013] [Accepted: 10/01/2013] [Indexed: 12/30/2022] Open
Abstract
BACKGROUND Mycobacterium tuberculosis (Mtb) infections are still a major cause of death among all infectious diseases. Although 99% of individuals infected with Mtb develop a CD4(+) Th1 and CD8(+) T cell mediated immunity as measured by tuberculin skin test, this results only in partial protection and Mtb vaccines are not effective. Deviation of immune responses by pathogens towards a Th2 profile is a common mechanism of immune evasion, typically leading to the persistence of the microbes. RESULTS Here we tested the stimulatory capacity of selective Mtb antigens on human monocyte-derived dendritic cell (DC) maturation and cytokine production. DC maturation markers CD80, CD86 and CD83 were readily upregulated by H37Ra- and H37Rv-associated antigens, the 30-kDa (from Ag85 B complex) and 38-KDa Mtb antigens only partially induced these markers. All Mtb antigens induced variable levels of IL-6 and low levels of IL-10, there was no release of IL-12p70 detectable. Substantial IL-12p40 production was restricted to LPS or H37Ra and H37Rv preparations. Although the proliferation levels of primary T cell responses were comparable using all the differentially stimulated DC, the 30-kDa and 38-kDa antigens showed a bias towards IL-4 secretion of polarized CD4(+) T cells after secondary stimulation as compared to H37Ra and H37Rv preparations. CONCLUSION Together our data indicate that 30-kDa and 38-kDa Mtb antigens induced only partial DC maturation shifting immune responses towards a Th2 profile.
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Affiliation(s)
- Marion Heuer
- Institute of Virology and Immunobiology, University of Würzburg, Würzburg, Germany
| | - Anna-Sophie Behlich
- Institute of Virology and Immunobiology, University of Würzburg, Würzburg, Germany
| | - Ji-Sook Lee
- Department of Microbiology, College of Medicine, Konyang University, Daejeon 302-718, South Korea
| | - Eliana Ribechini
- Institute of Virology and Immunobiology, University of Würzburg, Würzburg, Germany
| | - Eun-Kyeong Jo
- Department of Microbiology, College of Medicine, Konyang University, Daejeon 302-718, South Korea
| | - Manfred B Lutz
- Institute of Virology and Immunobiology, University of Würzburg, Würzburg, Germany
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Sohrabi Y, Havelková H, Kobets T, Šíma M, Volkova V, Grekov I, Jarošíková T, Kurey I, Vojtíšková J, Svobodová M, Demant P, Lipoldová M. Mapping the genes for susceptibility and response to Leishmania tropica in mouse. PLoS Negl Trop Dis 2013; 7:e2282. [PMID: 23875032 PMCID: PMC3708836 DOI: 10.1371/journal.pntd.0002282] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2012] [Accepted: 05/09/2013] [Indexed: 12/04/2022] Open
Abstract
Background L. tropica can cause both cutaneous and visceral leishmaniasis in humans. Although the L. tropica-induced cutaneous disease has been long known, its potential to visceralize in humans was recognized only recently. As nothing is known about the genetics of host responses to this infection and their clinical impact, we developed an informative animal model. We described previously that the recombinant congenic strain CcS-16 carrying 12.5% genes from the resistant parental strain STS/A and 87.5% genes from the susceptible strain BALB/c is more susceptible to L. tropica than BALB/c. We used these strains to map and functionally characterize the gene-loci regulating the immune responses and pathology. Methods We analyzed genetics of response to L. tropica in infected F2 hybrids between BALB/c×CcS-16. CcS-16 strain carries STS-derived segments on nine chromosomes. We genotyped these segments in the F2 hybrid mice and tested their linkage with pathological changes and systemic immune responses. Principal Findings We mapped 8 Ltr (Leishmania tropica response) loci. Four loci (Ltr2, Ltr3, Ltr6 and Ltr8) exhibit independent responses to L. tropica, while Ltr1, Ltr4, Ltr5 and Ltr7 were detected only in gene-gene interactions with other Ltr loci. Ltr3 exhibits the recently discovered phenomenon of transgenerational parental effect on parasite numbers in spleen. The most precise mapping (4.07 Mb) was achieved for Ltr1 (chr.2), which controls parasite numbers in lymph nodes. Five Ltr loci co-localize with loci controlling susceptibility to L. major, three are likely L. tropica specific. Individual Ltr loci affect different subsets of responses, exhibit organ specific effects and a separate control of parasite load and organ pathology. Conclusion We present the first identification of genetic loci controlling susceptibility to L. tropica. The different combinations of alleles controlling various symptoms of the disease likely co-determine different manifestations of disease induced by the same pathogen in individual mice. Leishmaniasis, a disease caused by Leishmania ssp. is among the most neglected infectious diseases. In humans, L. tropica causes cutaneous form of leishmaniasis, but can damage internal organs too. The reasons for this variability are not known, and its genetic basis was never investigated. Therefore, analysis of genes affecting host's responses to this infection can elucidate the characteristics of individual host-parasite interactions. Recombinant congenic strain CcS-16 carries 12.5% genes from the mouse strain STS/A on genetic background of the strain BALB/c, and it is more susceptible than BALB/c. In F2 hybrids between BALB/c and CcS-16 we detected and mapped eight gene-loci, Ltr1-8 (Leishmania tropica response 1-8) that control various manifestations of disease: skin lesions, splenomegaly, hepatomegaly, parasite numbers in spleen, liver, and inguinal lymph nodes, and serum level of CCL3, CCL5, and CCL7 after L. tropica infection. These loci are functionally heterogeneous - each influences a different set of responses to the pathogen. Five loci co-localize with the previously described loci that control susceptibility to L. major, three are species-specific. Ltr2 co-localizes not only with Lmr14 (Leishmania major response 14), but also with Ir2 influencing susceptibility to L. donovani and might therefore carry a common gene controlling susceptibility to leishmaniasis.
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Affiliation(s)
- Yahya Sohrabi
- Laboratory of Molecular and Cellular Immunology, Institute of Molecular Genetics, Academy of Sciences of the Czech Republic, Prague, Czech Republic
| | - Helena Havelková
- Laboratory of Molecular and Cellular Immunology, Institute of Molecular Genetics, Academy of Sciences of the Czech Republic, Prague, Czech Republic
| | - Tetyana Kobets
- Laboratory of Molecular and Cellular Immunology, Institute of Molecular Genetics, Academy of Sciences of the Czech Republic, Prague, Czech Republic
| | - Matyáš Šíma
- Laboratory of Molecular and Cellular Immunology, Institute of Molecular Genetics, Academy of Sciences of the Czech Republic, Prague, Czech Republic
| | - Valeriya Volkova
- Laboratory of Molecular and Cellular Immunology, Institute of Molecular Genetics, Academy of Sciences of the Czech Republic, Prague, Czech Republic
| | - Igor Grekov
- Laboratory of Molecular and Cellular Immunology, Institute of Molecular Genetics, Academy of Sciences of the Czech Republic, Prague, Czech Republic
| | - Taťána Jarošíková
- Faculty of Biomedical Engineering, Czech Technical University in Prague, Kladno, Czech Republic
| | - Iryna Kurey
- Laboratory of Molecular and Cellular Immunology, Institute of Molecular Genetics, Academy of Sciences of the Czech Republic, Prague, Czech Republic
| | - Jarmila Vojtíšková
- Laboratory of Molecular and Cellular Immunology, Institute of Molecular Genetics, Academy of Sciences of the Czech Republic, Prague, Czech Republic
| | | | - Peter Demant
- Roswell Park Cancer Institute, Buffalo, New York, United States of America
| | - Marie Lipoldová
- Laboratory of Molecular and Cellular Immunology, Institute of Molecular Genetics, Academy of Sciences of the Czech Republic, Prague, Czech Republic
- * E-mail:
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Cintolo JA, Datta J, Mathew SJ, Czerniecki BJ. Dendritic cell-based vaccines: barriers and opportunities. Future Oncol 2013; 8:1273-99. [PMID: 23130928 DOI: 10.2217/fon.12.125] [Citation(s) in RCA: 95] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Dendritic cells (DCs) have several characteristics that make them an ideal vehicle for tumor vaccines, and with the first US FDA-approved DC-based vaccine in use for the treatment of prostate cancer, this technology has become a promising new therapeutic option. However, DC-based vaccines face several barriers that have limited their effectiveness in clinical trials. A major barrier includes the activation state of the DC. Both DC lineage and maturation signals must be selected to optimize the antitumor response and overcome immunosuppressive effects of the tumor microenvironment. Another barrier to successful vaccination is the selection of target antigens that will activate both CD8(+) and CD4(+) T cells in a potent, immune-specific manner. Finally, tumor progression and immune dysfunction limit vaccine efficacy in advanced stages, which may make DC-based vaccines more efficacious in treating early-stage disease. This review underscores the scientific basis and advances in the development of DC-based vaccines, focuses on current barriers to success and highlights new research opportunities to address these obstacles.
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Affiliation(s)
- Jessica A Cintolo
- Department of Surgery & Harrison Department of Surgical Research, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA 19104, USA
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20
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Li M, Shi M, Abraham NG, Ikehara S. Improved expression of Sirt1 on thymic epithelial cells of SAMP10 after Intrabone marrow-bone marrow transplantation. Cell Transplant 2013; 23:1019-29. [PMID: 23452762 DOI: 10.3727/096368913x664568] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Aging is accompanied by various forms of immune dysfunction, leading to an increase in frequency of infections and the development of malignant tumors in mice and humans. Sirt1 has been implicated in processes as varied as metabolism, differentiation, cancer, and the stress response and aging. Senescence-accelerated mice prone 10 (SAMP10) show not only spontaneously occurring brain atrophy, with deficits in learning and memory, but also emotional disorders. We attempted in this study to clarify the deficits and found that the percentage of CD4/TNF-α T-cells in the spleen of 24-week-old (but not 6-week-old) SAMP10 to be significantly reduced. The thymus was significantly lighter, and the percentage of CD4⁺CD8⁺ cells was significantly lower in the 24-week-old SAMP10 than 6-week-old SAMP10. Microarray analyses indicated that genes related to transcription coactivator activity, growth factor activity, hormone activity, cytokine activity, receptor activity, and regulation of the immune system were downregulated in the thymus of 24-week-old SAMP10. Real-time PCR analysis showed that the expression of KGF, Aire, and Sirt1 was decreased on the thymic epithelial cells (TECs) of 24-week-old SAMP10. However, these parameters improved after the mice were treated with intrabone marrow-bone marrow transplantation. This is the first report of age-related changes in immune system dysfunction in 24-week-old SAMP10 and the first to show that dysfunction on the TECs of 24-week-old SAMP10 was modulated by allogeneic bone marrow cells.
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Affiliation(s)
- Ming Li
- Department of Stem Cell Disorders, Kansai Medical University, Hirakata City, Osaka, Japan
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21
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Liu J, Chen W, Meng J, Lu C, Wang E, Shan F. Induction on differentiation and modulation of bone marrow progenitor of dendritic cell by methionine enkephalin (MENK). Cancer Immunol Immunother 2012; 61:1699-711. [PMID: 22392190 PMCID: PMC11028663 DOI: 10.1007/s00262-012-1221-9] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2012] [Accepted: 02/06/2012] [Indexed: 12/22/2022]
Abstract
Methionine enkephalin (MENK), the endogenous neuropeptide, is known to exert direct effects on the neuroendocrine and the immune systems and participates in regulation of various functions of cells related to both the innate and adaptive immune systems. Dendritic cells (DCs) play important role in initiating and regulating T cell responses. The aim of this work is to investigate the effects of MENK on differentiation, maturation, and function of DCs derived from murine bone marrow progenitors (BM-derived DCs). Our result showed that MENK could induce BM-derived DCs to polarize predominantly to mDC subtype, rather than pDC both in vivo and in vitro, and this was in favor of Th1 response. BM-derived DCs, after treatment with MENK, up-regulated the expressions of MHC class II and key costimulatory molecules. Result by RT-PCR showed MENK could increase expressions of delta and kappa receptors on BM-derived DCs. Also MENK promoted BM-derived DCs to secret higher levels of proinflammatory cytokines of IL-12p70, TNF-α. Furthermore, differentiated BM-derived DCs treated with MENK displayed higher activity to induce allogeneic T cell proliferation and MENK also inhibited tumor growth in vivo and induced apoptosis of tumor cells in vitro. Thus, it is concluded that MENK could be an effective inducer of BM-derived DCs and might be a new therapeutic agent for cancer, as well as other immune handicapped disease. Also we may consider MENK as a potential adjuvant in vaccine preparation.
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Affiliation(s)
- Jingling Liu
- Department of Immunology, School of Basic Medical Science, China Medical University, No. 92, North Second Road, Heping District, Shenyang, 110001 People’s Republic of China
- College of Animal Science and Veterinary Medicine, Shenyang Agricultural University, No. 120, Dongling Road, Shenhe District, Shenyang, 110866 People’s Republic of China
| | - Wenna Chen
- Department of Immunology, School of Basic Medical Science, China Medical University, No. 92, North Second Road, Heping District, Shenyang, 110001 People’s Republic of China
| | - Jingjuan Meng
- Department of Immunology, School of Basic Medical Science, China Medical University, No. 92, North Second Road, Heping District, Shenyang, 110001 People’s Republic of China
| | - Changlong Lu
- Department of Immunology, School of Basic Medical Science, China Medical University, No. 92, North Second Road, Heping District, Shenyang, 110001 People’s Republic of China
| | - Enhua Wang
- Institute of Pathology and Pathophysiology, School of Basic Medical Science, China Medical University, No. 92, North Second Road, Heping District, Shenyang, 110001 People’s Republic of China
| | - Fengping Shan
- Department of Immunology, School of Basic Medical Science, China Medical University, No. 92, North Second Road, Heping District, Shenyang, 110001 People’s Republic of China
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22
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Rocha CD, Trombone APF, Lorenzi JCC, Almeida LP, Gembre AF, Padilha E, Ramos SG, Silva CL, Coelho-Castelo AAM. Antigen-presenting cells transfected with Hsp65 messenger RNA fail to treat experimental tuberculosis. Braz J Med Biol Res 2012; 45:1183-94. [PMID: 22983180 PMCID: PMC3854234 DOI: 10.1590/s0100-879x2012007500148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2012] [Accepted: 08/15/2012] [Indexed: 11/22/2022] Open
Abstract
In the last several years, the use of dendritic cells has been studied as a therapeutic strategy against tumors. Dendritic cells can be pulsed with peptides or full-length protein, or they can be transfected with DNA or RNA. However, comparative studies suggest that transfecting dendritic cells with messenger RNA (mRNA) is superior to other antigen-loading techniques in generating immunocompetent dendritic cells. In the present study, we evaluated a new therapeutic strategy to fight tuberculosis using dendritic cells and macrophages transfected with Hsp65 mRNA. First, we demonstrated that antigen-presenting cells transfected with Hsp65 mRNA exhibit a higher level of expression of co-stimulatory molecules, suggesting that Hsp65 mRNA has immunostimulatory properties. We also demonstrated that spleen cells obtained from animals immunized with mock and Hsp65 mRNA-transfected dendritic cells were able to generate a mixed Th1/Th2 response with production not only of IFN-γ but also of IL-5 and IL-10. In contrast, cells recovered from mice immunized with Hsp65 mRNA-transfected macrophages were able to produce only IL-5. When mice were infected with Mycobacterium tuberculosis and treated with antigen-presenting cells transfected with Hsp65 mRNA (therapeutic immunization), we did not detect any decrease in the lung bacterial load or any preservation of the lung parenchyma, indicating the inability of transfected cells to confer curative effects against tuberculosis. In spite of the lack of therapeutic efficacy, this study reports for the first time the use of antigen-presenting cells transfected with mRNA in experimental tuberculosis.
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Affiliation(s)
- C D Rocha
- Departamento de Bioquímica e Imunologia, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brasil
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23
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Abstract
The co-evolution of a wide range of helminth parasites and vertebrates represented a constant pressure on the host's immune system and a selective force for shaping the immune response. Modulation of the immune system by parasites is accomplished partly by dendritic cells. When exposed to helminth parasites or their products, dendritic cells do not become classically mature and are potent inducers of Th2 and regulatory responses. Treating animals with helminths (eggs, larvae, extracts) causes dampening or in some cases prevention of allergic or autoimmune diseases. Trichinella spiralis (T. spiralis) possess a capacity to retune the immune cell repertoire, acting as a moderator of the host response not only to itself but also to third party antigens. In this review, we will focus on the ability of T. spiralis-stimulated dendritic cells to polarize the immune response toward Th2 and regulatory mode in vitro and in vivo and also on the capacity of this parasite to modulate autoimmune disease--such as experimental autoimmune encephalomyelitis.
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Lutz MB. Therapeutic potential of semi-mature dendritic cells for tolerance induction. Front Immunol 2012; 3:123. [PMID: 22629255 PMCID: PMC3355325 DOI: 10.3389/fimmu.2012.00123] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2012] [Accepted: 04/30/2012] [Indexed: 12/23/2022] Open
Abstract
Dendritic cells (DCs) are major players in the control of adaptive tolerance and immunity. Therefore, their specific generation and adoptive transfer into patients or their in vivo targeting is attractive for clinical applications. While injections of mature immunogenic DCs are tested in clinical trials, tolerogenic DCs still are awaiting this step. Besides the tolerogenic potential of immature DCs, also semi-mature DCs can show tolerogenic activity but both types also bear unfavorable features. Optimal tolerogenic DCs, their molecular tool bar, and their use for specific diseases still have to be defined. Here, the usefulness of in vitro generated and adoptively transferred semi-mature DCs for tolerance induction is outlined. The in vivo targeting of semi-mature DCs as represented by steady state migratory DCs are discussed for treatment of autoimmune diseases and allergies. First clinical trials with transcutaneous allergen application may point to their therapeutic use in the future.
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Affiliation(s)
- Manfred B Lutz
- Institute of Virology and Immunobiology, University of Wuerzburg Wuerzburg, Germany
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25
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Jiao J, Sastre D, Isabel Fiel M, Lee UE, Ghiassi-Nejad Z, Ginhoux F, Vivier E, Friedman SL, Merad M, Aloman C. Dendritic cell regulation of carbon tetrachloride-induced murine liver fibrosis regression. Hepatology 2012; 55:244-55. [PMID: 21898476 PMCID: PMC3245345 DOI: 10.1002/hep.24621] [Citation(s) in RCA: 110] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
UNLABELLED Although hepatic fibrosis typically follows chronic inflammation, fibrosis will often regress after cessation of liver injury. In this study, we examined whether liver dendritic cells (DCs) play a role in liver fibrosis regression using carbon tetrachloride to induce liver injury. We examined DC dynamics during fibrosis regression and their capacity to modulate liver fibrosis regression upon cessation of injury. We show that conditional DC depletion soon after discontinuation of the liver insult leads to delayed fibrosis regression and reduced clearance of activated hepatic stellate cells, the key fibrogenic cell in the liver. Conversely, DC expansion induced either by Flt3L (fms-like tyrosine kinase-3 ligand) or adoptive transfer of purified DCs accelerates liver fibrosis regression. DC modulation of fibrosis was partially dependent on matrix metalloproteinase (MMP)-9, because MMP-9 inhibition abolished the Flt3L-mediated effect and the ability of transferred DCs to accelerate fibrosis regression. In contrast, transfer of DCs from MMP-9-deficient mice failed to improve fibrosis regression. CONCLUSION Taken together, these results suggest that DCs increase fibrosis regression and that the effect is correlated with their production of MMP-9. The results also suggest that Flt3L treatment during fibrosis resolution merits evaluation to accelerate regression of advanced liver fibrosis.
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Affiliation(s)
- JingJing Jiao
- Division of Liver Diseases, Dept of Medicine, Mount Sinai School of Medicine
| | - David Sastre
- Division of Liver Diseases, Dept of Medicine, Mount Sinai School of Medicine
| | | | - Ursula E. Lee
- Division of Liver Diseases, Dept of Medicine, Mount Sinai School of Medicine
| | - Zahra Ghiassi-Nejad
- Division of Liver Diseases, Dept of Medicine, Mount Sinai School of Medicine
| | - Florent Ginhoux
- Department of Gene and Cell Medicine, Mount Sinai School of Medicine,ASTAR, Singapore Immunology Network, Singapore
| | - Eric Vivier
- Centre d'Immunologie de Marseille-Luminy, Université de la Méditerranée, INSERM, U631, France
| | - Scott L. Friedman
- Division of Liver Diseases, Dept of Medicine, Mount Sinai School of Medicine
| | - Miriam Merad
- Department of Gene and Cell Medicine, Mount Sinai School of Medicine
| | - Costica Aloman
- Division of Liver Diseases, Dept of Medicine, Mount Sinai School of Medicine
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26
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Pletinckx K, Stijlemans B, Pavlovic V, Laube R, Brandl C, Kneitz S, Beschin A, De Baetselier P, Lutz MB. Similar inflammatory DC maturation signatures induced by TNF or Trypanosoma brucei antigens instruct default Th2-cell responses. Eur J Immunol 2011; 41:3479-94. [PMID: 21928284 DOI: 10.1002/eji.201141631] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2011] [Revised: 07/20/2011] [Accepted: 09/15/2011] [Indexed: 12/14/2022]
Abstract
DCs represent the major cell type leading to polarized T-helper (Th) cell responses in vivo. Here, we asked whether the instruction of murine Th2 responses by DCs matured with the proinflammatory cytokine TNF is qualitatively different from maturation by different types of TLR4/MyD88-dependent variant-specific surface glycoproteins (VSGs) of Trypanosoma brucei (T. brucei). The results obtained by analyzing DC surface markers, Notch ligand mRNA, cytokines, asthma, and experimental autoimmune encephalomyelitis (EAE) models as well as performing microarrays indicate that both types of stimuli induce similar inflammatory, semi-mature DC profiles. DCs matured by TNF or VSG treatment expressed a common inflammatory signature of 24 genes correlating with their Th2-polarization capacity. However, the same 24 genes and 4498 additional genes were expressed by DCs treated with LPS that went on to induce Th1 cells. These findings support the concept of a default pathway for Th2-cell induction in DCs matured under suboptimal or inflammatory conditions, independent of the surface receptors and signaling pathways involved. Our data also indicate that quantitative differences in DC maturation might direct Th2- vs Th1-cell responses, since suboptimally matured inflammatory DCs induce default Th2-cell maturation, whereas fully mature DCs induce Th1-cell maturation.
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Affiliation(s)
- Katrien Pletinckx
- Institute of Virology and Immunobiology, University of Wuerzburg, Wuerzburg, Germany
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Ilic N, Worthington JJ, Gruden-Movsesijan A, Travis MA, Sofronic-Milosavljevic L, Grencis RK. Trichinella spiralis antigens prime mixed Th1/Th2 response but do not induce de novo generation of Foxp3+ T cells in vitro. Parasite Immunol 2011; 33:572-82. [PMID: 21793858 PMCID: PMC3485669 DOI: 10.1111/j.1365-3024.2011.01322.x] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2011] [Accepted: 07/20/2011] [Indexed: 11/28/2022]
Abstract
Many parasitic helminth infections induce Th2-type immune responses and engage the regulatory network. In this study, we specifically investigated the influence of antigens derived from different life stages of the helminth Trichinella spiralis on the polarization of naive CD4(+) T cells by dendritic cells. Results obtained from C57BL/6 mice showed that T. spiralis derived antigens have the capacity to induce bone marrow-derived dendritic cells to acquire an incompletely mature phenotype that promotes a significant proliferation of naive CD4(+) T cells and a mixed Th1/Th2 cytokine profile with the predominance of Th2 cytokines. Increased production of IL-4, IL-9, IL-10 and IL-13 accompanied increased IFN-γ. Furthermore, dendritic cells pulsed with T. spiralis antigens did not induce an increase in the population of Foxp3(+) T regulatory cells. Although other helminth antigens have demonstrated the capacity to induce de novo generation of Foxp3(+) T regulatory cells, here our in vitro studies provide no evidence that T. spiralis antigens have this capacity.
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Affiliation(s)
- N Ilic
- Institute for the Application of Nuclear Energy, University of Belgrade, Belgrade, Serbia.
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Pletinckx K, Döhler A, Pavlovic V, Lutz MB. Role of dendritic cell maturity/costimulation for generation, homeostasis, and suppressive activity of regulatory T cells. Front Immunol 2011; 2:39. [PMID: 22566829 PMCID: PMC3342346 DOI: 10.3389/fimmu.2011.00039] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2011] [Accepted: 08/18/2011] [Indexed: 01/07/2023] Open
Abstract
Tolerogenicity of dendritic cells (DCs) has initially been attributed exclusively to immature/resting stages, while mature/activated DCs were considered strictly immunogenic. Later, all different subsets among the myeloid/conventional DCs and plasmacytoid DCs have been shown to bear tolerogenic potential, so that tolerogenicity could not be attributed to a specific subset. Immunosuppressive treatments of immature DC subsets could prevent re-programming into mature DCs or upregulated inhibitory surface markers or cytokines. Furthermore, the different T cell tolerance mechanisms anergy, deletion, immune deviation, and suppression require different quantities and qualities of costimulation by DCs. Since expansion of regulatory T cells (Tregs) has been shown to be promoted best by fully mature DCs the role of CD80/B7-1 and CD86/B7-2 as major costimulatory molecules for Treg biology is under debate. In this review, we discuss the role of these and other costimulatory molecules on myeloid DCs and their ligands CD28 and CD152/CTLA-4 on Tregs for peripheral conversion from naive CD4+ T cells into the major subsets of Foxp3+ Tregs and Foxp3− IL-10+ regulatory type-1 T cells (Tr1) or Tr1-like cells and their role for peripheral maintenance in the steady state and after activation.
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Affiliation(s)
- Katrien Pletinckx
- Institute of Virology and Immunobiology, University of Wuerzburg Wuerzburg, Germany
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29
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Current immunotherapeutic approaches in pancreatic cancer. Clin Dev Immunol 2011; 2011:267539. [PMID: 21922022 PMCID: PMC3172984 DOI: 10.1155/2011/267539] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2011] [Accepted: 06/26/2011] [Indexed: 12/13/2022]
Abstract
Pancreatic cancer is a highly aggressive and notoriously difficult to treat. As the vast majority of patients are diagnosed at advanced stage of the disease, only a small population is curative by surgical resection. Although gemcitabine-based chemotherapy is typically offered as standard of care, most patients do not survive longer than 6 months. Thus, new therapeutic approaches are needed. Pancreatic cancer cells that develop gemcitabine resistance would still be suitable targets for immunotherapy. Therefore, one promising treatment approach may be immunotherapy that is designed to target pancreatic-cancer-associated antigens. In this paper, we detail recent work in immunotherapy and the advances in concept of combination therapy of immunotherapy and chemotherapy. We offer our perspective on how to increase the clinical efficacy of immunotherapies for pancreatic cancer.
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Early activated Th-1 type and dominantly diverse natural killer T (CD3+CD161+Vα24−) cells in bone marrow among visceral leishmaniasis patients. Int J Parasitol 2011; 41:1069-77. [DOI: 10.1016/j.ijpara.2011.05.010] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2011] [Revised: 05/26/2011] [Accepted: 05/30/2011] [Indexed: 11/21/2022]
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Pérez-Cabezas B, Naranjo-Gómez M, Bastos-Amador P, Requena-Fernández G, Pujol-Borrell R, Borràs FE. Ligation of Notch receptors in human conventional and plasmacytoid dendritic cells differentially regulates cytokine and chemokine secretion and modulates Th cell polarization. THE JOURNAL OF IMMUNOLOGY 2011; 186:7006-15. [PMID: 21593384 DOI: 10.4049/jimmunol.1100203] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Notch signaling is involved in multiple cellular processes. Recent data also support the prominent role of Notch signaling in the regulation of the immune response. In this study, we analyzed the expression and function of Notch receptors and ligands on both human blood conventional dendritic cells (cDCs) and plasmacytoid DCs (pDCs). The expression and modulation upon TLR activation of Notch molecules partially differed between cDCs and pDCs, but functional involvement of the Notch pathway in both cell types was clearly revealed by specific inhibition using DAPT. Beyond the induction of Notch target genes and modulation of maturation markers, Notch pathway was also involved in a differential secretion of some specific cytokines/chemokines by DC subsets. Whereas Notch ligation induced IL-10 and CCL19 secretion in cDCs, Notch inhibition resulted in a diminished production of these proteins. With regard to pDCs, Notch activation induced TNF-α whereas Notch inhibition significantly abrogated the secretion of CCL19, CXCL9, CXCL10, and TNF-α. Additionally, Notch modulation of DC subsets differentially affected Th polarization of allostimulated T cells. Our results suggest that the Notch pathway may function as an additional mechanism controlling human DC responses, with differential activity on cDCs and pDCs. This control mechanism may ultimately contribute to define the local milieu promoted by these cells under the particular conditions of the immune response.
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Affiliation(s)
- Begoña Pérez-Cabezas
- Laboratori d'Immunobiologia i Diagnòstic Molecular, Banc de Sang i Teixits, Departament de Biologia Cellular, Fisiologia i Immunologia, Universitat Autònoma de Barcelona, Institut d'Investigació Germans Trias i Pujol, 08916 Badalona, Barcelona, Spain
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Abstract
Cancer immunotherapy aims to establish immune-mediated control of tumor growth by priming T-cell responses to target tumor-associated antigens. Three signals are required for T-cell activation: (i) presentation of cognate antigen in self MHC molecules; (ii) costimulation by membrane-bound receptor-ligand pairs; and (iii) soluble factors to direct polarization of the ensuing immune response. The ability of dendritic cells (DCs) to provide all three signals required for T-cell activation makes them an ideal cancer vaccine platform. Several strategies have been developed to enhance and control antigen presentation, costimulation, and cytokine production. In this review, we discuss progress toward developing DC-based cancer vaccines by genetic modification using RNA, DNA, and recombinant viruses. Furthermore, the ability of DC-based vaccines to activate natural killer (NK) and B-cells, and the impact of gene modification strategies on these populations is described. Clinical trials using gene-modified DCs have shown modest results, therefore, further considerations for DC manipulation to enhance their clinical efficacy are also discussed.
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Liu W, Huber SA. Cross-talk between cd1d-restricted nkt cells and γδ cells in t regulatory cell response. Virol J 2011; 8:32. [PMID: 21255407 PMCID: PMC3033358 DOI: 10.1186/1743-422x-8-32] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2010] [Accepted: 01/21/2011] [Indexed: 01/07/2023] Open
Abstract
CD1d is a non-classical major histocompatibility class 1-like molecule which primarily presents either microbial or endogenous glycolipid antigens to T cells involved in innate immunity. Natural killer T (NKT) cells and a subpopulation of γδ T cells expressing the Vγ4 T cell receptor (TCR) recognize CD1d. NKT and Vγ4 T cells function in the innate immune response via rapid activation subsequent to infection and secrete large quantities of cytokines that both help control infection and modulate the developing adaptive immune response. T regulatory cells represent one cell population impacted by both NKT and Vγ4 T cells. This review discusses the evidence that NKT cells promote T regulatory cell activation both through direct interaction of NKT cell and dendritic cells and through NKT cell secretion of large amounts of TGFβ, IL-10 and IL-2. Recent studies have shown that CD1d-restricted Vγ4 T cells, in contrast to NKT cells, selectively kill T regulatory cells through a caspase-dependent mechanism. Vγ4 T cell elimination of the T regulatory cell population allows activation of autoimmune CD8+ effector cells leading to severe cardiac injury in a coxsackievirus B3 (CVB3) myocarditis model in mice. CD1d-restricted immunity can therefore lead to either immunosuppression or autoimmunity depending upon the type of innate effector dominating during the infection.
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Affiliation(s)
- Wei Liu
- The First Affiliated Hospital of Harbin Medical University, Harbin 150001, PR China
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Palha De Sousa C, Blum CM, Sgroe EP, Crespo AM, Kurt RA. Murine mammary carcinoma cells and CD11c(+) dendritic cells elicit distinct responses to lipopolysaccharide and exhibit differential expression of genes required for TLR4 signaling. Cell Immunol 2010; 266:67-75. [PMID: 20869044 DOI: 10.1016/j.cellimm.2010.08.015] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2010] [Revised: 08/29/2010] [Accepted: 08/31/2010] [Indexed: 10/19/2022]
Abstract
Although TLR are often studied on DC because of their ability to bridge innate and adaptive defenses, TLR are also expressed by epithelial cells. Because the majority of cancers are carcinomas, and thus of epithelial origin, we wanted to know whether a carcinoma and DC responded similarly to a TLR agonist. We found the mammary carcinoma 4T1 and CD11c(+) DC both secreted proinflammatory chemokines in response to the TLR4 agonist lipopolysaccharide (LPS). However a clear dichotomy existed. DC, but not 4T1 secreted IL-1β, TNF-α, and upregulated CD80 and CD86 expression following LPS treatment. A potential reason for differential responsiveness was that DC expressed greater levels of TLR4, CD14, Myd88, and TRAM. Despite the low level of TLR signaling proteins, the carcinoma were able to elicit a range of responses contingent upon the source, dose, length, and frequency of TLR agonist treatment. Thus, carcinoma and DC are distinctly responsive to LPS.
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Snyder-Cappione JE, Tincati C, Eccles-James IG, Cappione AJ, Ndhlovu LC, Koth LL, Nixon DF. A comprehensive ex vivo functional analysis of human NKT cells reveals production of MIP1-α and MIP1-β, a lack of IL-17, and a Th1-bias in males. PLoS One 2010; 5:e15412. [PMID: 21082024 PMCID: PMC2972714 DOI: 10.1371/journal.pone.0015412] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2010] [Accepted: 09/09/2010] [Indexed: 01/06/2023] Open
Abstract
NKT cells contribute to the modulation of immune responses and are believed to be important in the pathogenesis of autoimmune and infectious diseases, as well as cancer. Variations in the composite NKT cytokine response may determine individual disease susceptibility or severity. Due to low frequencies in peripheral blood, knowledge of the breadth of ex vivo human NKT cell functions has been limited. To bridge this gap, we studied highly purified NKT cells from PBMC of healthy donors and assessed the production of 27 effector functions using sensitive Elispot and multiplex bead assays. We found the ex vivo human NKT cell response is predominantly comprised of the chemokines MIP1-α, and MIP1-β as well as the Th1 cytokines IFN-γ and TNF-α. Although lower in magnitude, there was also significant production of IL-2, IL-4, and perforin after mitogen stimulation. Surprisingly, little/no IL-5, IL-6, IL-10, or IL-13 was detected, and no subjects' NKT cells produced IL-17. Comparison of the NKT functional profiles between age-matched male and female subjects revealed similar IL-4 responses, but higher frequencies of cells producing IFN-γ and MIP1-α, from males. There were no gender differences in the circulating NKT subset distribution. These findings implicate chemokines as a major mechanism by which NKT cells control responses in humans. In addition, the panoply of Th2 and Th17 cytokine secretion by NKT cells from healthy donors may not be as pronounced as previously believed. NKT cells may therefore contribute to the gender bias found in many diseases.
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Affiliation(s)
- Jennifer E Snyder-Cappione
- Department of Medicine, University of California San Francisco, San Francisco, California, United States of America.
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Ahlers JD, Belyakov IM. Molecular pathways regulating CD4+ T cell differentiation, anergy and memory with implications for vaccines. Trends Mol Med 2010; 16:478-91. [DOI: 10.1016/j.molmed.2010.07.007] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2010] [Revised: 07/18/2010] [Accepted: 07/19/2010] [Indexed: 12/23/2022]
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Cheng P, Zhou J, Gabrilovich D. Regulation of dendritic cell differentiation and function by Notch and Wnt pathways. Immunol Rev 2010; 234:105-19. [PMID: 20193015 DOI: 10.1111/j.0105-2896.2009.00871.x] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
The process of dendritic cell differentiation is governed by a tightly controlled signaling network regulated by cytokines and direct interaction between progenitor cells and bone marrow stroma. Notch signaling represents one of the major pathways activated during direct interaction between hematopoietic progenitor cells and bone marrow stroma. Wnt pathway is activated by soluble proteins produced by bone marrow stroma. Until recently, the role of Notch and Wnt signaling in the development of myeloid cells and dendritic cells in particular remained unclear. In this review, we discuss recent exciting findings that shed light on the critical role of Notch and Wnt pathways, their interaction in differentiation and function of dendritic cells, and their impact on immune responses.
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Affiliation(s)
- Pingyan Cheng
- H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL 33612, USA
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Jimenez F, Quinones MP, Martinez HG, Estrada CA, Clark K, Garavito E, Ibarra J, Melby PC, Ahuja SS. CCR2 plays a critical role in dendritic cell maturation: possible role of CCL2 and NF-kappa B. THE JOURNAL OF IMMUNOLOGY 2010; 184:5571-81. [PMID: 20404272 DOI: 10.4049/jimmunol.0803494] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
We postulated that CCR2-driven activation of the transcription factor NF-kappaB plays a critical role in dendritic cell (DC) maturation (e.g., migration, costimulation, and IL-12p70 production), necessary for the generation of protective immune responses against the intracellular pathogen Leishmania major. Supporting this notion, we found that CCR2, its ligand CCL2, and NF-kappaB were required for CCL19 production and adequate Langerhans cell (LC) migration both ex vivo and in vivo. Furthermore, a role for CCR2 in upregulating costimulatory molecules was indicated by the reduced expression of CD80, CD86, and CD40 in Ccr2(-/-) bone marrow-derived dendritic cells (BMDCs) compared with wild-type (WT) BMDCs. Four lines of evidence suggested that CCR2 plays a critical role in the induction of protective immunity against L. major by regulating IL-12p70 production and migration of DC populations such as LCs. First, compared with WT, Ccr2(-/-) lymph node cells, splenocytes, BMDCs, and LCs produced lower levels of IL-12p70 following stimulation with LPS/IFN-gamma or L. major. Second, a reduced number of LCs carried L. major from the skin to the draining lymph nodes in Ccr2(-/-) mice compared with WT mice. Third, early treatment with exogenous IL-12 reversed the susceptibility to L. major infection in Ccr2(-/-) mice. Finally, disruption of IL-12p70 in radioresistant cells, such as LCs, but not in BMDCs resulted in the inability to mount a fully protective immune response in bone marrow chimeric mice. Collectively, our data point to an important role for CCR2-driven activation of NF-kappaB in the regulation of DC/LC maturation processes that regulate protective immunity against intracellular pathogens.
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Affiliation(s)
- Fabio Jimenez
- Audie L. Murphy Division, Veterans Administration Center for Research on AIDS and HIV-1 Infection, South Texas Veterans Health Care System, San Antonio, TX 78229, USA
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Antigen-presenting dendritic cells rescue CD4-depleted CCR2-/- mice from lethal Histoplasma capsulatum infection. Infect Immun 2010; 78:2125-37. [PMID: 20194586 DOI: 10.1128/iai.00065-10] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Excessive production of interleukin-4 impairs clearance of the fungal pathogen Histoplasma capsulatum in mice lacking the chemokine receptor CCR2. An increase in the interleukin-4 level is associated with decreased recruitment of dendritic cells to lungs; therefore, we investigated the possibility that these cells influence interleukin-4 production. Adoptive transfer of wild-type or CCR2(-/-) bone marrow-derived dendritic cells loaded with heat-killed yeast cells to infected CCR2(-/-) mice suppressed interleukin-4 transcription. Surprisingly, transfer of cells did not reduce the fungal burden despite the fact that it limited interleukin-4 transcription. Yeast cell-loaded bone marrow-derived dendritic cell-mediated regulation of interleukin-4 transcription was dependent on major histocompatibility complex II antigen presentation to CD4(+) T cells. We previously showed that CD4(+) T cells were a source of interleukin-4 in infected CCR2(-/-) mice, but their contribution to the TH2 phenotype was unclear. Here we demonstrated that these cells were functionally important since elimination of them prior to infection, but not elimination of them at the time of infection, reduced the interleukin-4 level in infected CCR2(-/-) mice. However, the fungal burden was reduced only in CD4-depleted CCR2(-/-) mice that received yeast cell-loaded bone marrow-derived dendritic cells. Taken together, the data indicate that generation of excess interleukin-4 in lungs of H. capsulatum-infected CCR2(-/-) mice is at least partially a consequence of decreased recruitment of dendritic cells capable of antigen presentation. Furthermore, CD4(+) T cells had a deleterious impact on immunity in infected CCR2(-/-) mice.
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Modulation of dendritic cell responses by parasites: a common strategy to survive. J Biomed Biotechnol 2010; 2010:357106. [PMID: 20204070 PMCID: PMC2829630 DOI: 10.1155/2010/357106] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2009] [Accepted: 11/18/2009] [Indexed: 12/28/2022] Open
Abstract
Parasitic infections are one of the most important causes of morbidity and mortality in our planet and the immune responses triggered by these organisms are critical to determine their outcome. Dendritic cells are key elements for the development of immunity against parasites; they control the responses required to eliminate these pathogens while maintaining host homeostasis. However, there is evidence showing that parasites can influence and regulate dendritic cell function in order to promote a more permissive environment for their survival. In this review we will focus on the strategies protozoan and helminth parasites have developed to interfere with dendritic cell activities as well as in the possible mechanisms involved.
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Activation-induced T helper cell death contributes to Th1/Th2 polarization following murine Schistosoma japonicum infection. J Biomed Biotechnol 2010; 2010:202397. [PMID: 20111738 PMCID: PMC2810471 DOI: 10.1155/2010/202397] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2009] [Accepted: 10/15/2009] [Indexed: 02/07/2023] Open
Abstract
In chronic infectious diseases, such as schistosomiasis, pathogen growth and immunopathology are affected by the induction of a proper balanced Th1/Th2 response to the pathogen and by antigen-triggered activation-induced T cell death. Here, by using S. japonicum infection or schistosome antigens-immunized mouse model, or antigens in vitro stimulation, we report that during the early stage of S. japonicum infection, nonegg antigens trigger Th2 cell apoptosis via the granzyme B signal pathway, contributing to Th1 polarization, which is thought to be associated with worm clearance and severe schistosomiasis. Meanwhile, after the adult worms lay their eggs, the egg antigens trigger Th1 cell apoptosis via the caspase pathway, contributing to Th2 polarization, which is associated with mild pathology and enhanced survival of both worms and their hosts. Thus, our study suggests that S. japonicum antigen-induced Th1 and Th2 cell apoptosis involves the Th1/Th2 shift and favorites both hosts and parasites.
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Loss of PKC lambda/iota impairs Th2 establishment and allergic airway inflammation in vivo. Proc Natl Acad Sci U S A 2009; 106:1099-104. [PMID: 19144923 DOI: 10.1073/pnas.0805907106] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
The differentiation of T cells along different lineages is central to the control of immunity. Here we have used a conditional gene knockout system to delete PKC lambda/iota selectively in activated T cells. With this system we have demonstrated that PKC lambda/iota is necessary for T-helper cell (Th2) cytokine production and optimal T-cell proliferation and allergic airway inflammation in vivo. Our data demonstrate that the activation of the transcription factors nuclear factor of activated T cells and NF-kappaB is impaired in PKC lambda/iota-deficient activated T cells. In addition, we present genetic knockout evidence in ex vivo experiments with primary T cells that PKC lambda/iota is critical for the control of cell polarity during T-cell activation. Therefore PKC lambda/iota emerges as a critical regulator of Th 2 activation.
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