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Showing 1 to 7 of 7 (0.098 seconds)Spelling suggestions: "subject:"plasmazytoide dendritischen Zellen"" "subject:"plasmazytoide dendritic Zellen""
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The Dox-pDC - A murine conditionally immortalized plasmacytoid dendritic cell line with native immune profileThieme, Sebastian, Holzbaur, Alexander, Wiedemuth, Ralf, Binner, Aline, Navratiel, Katrin, Anastassiadis, Konstantinos, Brenner, Sebastian, Richter, Cornelia 11 June 2018 (has links) (PDF)
Plasmacytoid dendritic cells (pDC) constitute a very rare blood cell population and play a significant role in immune response and immune-mediated disorders. Investigations on primary pDCs are hindered not only due to their rarity but also because they represent a heterogeneous cell population which is difficult to culture ex vivo. We generated a conditionally immortalized pDC line (Dox-pDC) from mice with Doxycycline-inducible SV40 Large T Antigen with a comparable immune profile to primary pDCs. The Dox-pDC secrete pro- and anti-inflammatory cytokines upon Toll-like receptor 9 stimulation and upregulate their MHCI, MHCII and costimulatory molecules. Further, the Dox-pDC activate and polarize naïve T cells in vivo and in vitro in response to the model antigen Ovalbumin. Due to their long-term culture stability and their robust proliferation Dox-pDC represent a reliable alternative to primary mouse pDC.
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The Dox-pDC - A murine conditionally immortalized plasmacytoid dendritic cell line with native immune profileThieme, Sebastian, Holzbaur, Alexander, Wiedemuth, Ralf, Binner, Aline, Navratiel, Katrin, Anastassiadis, Konstantinos, Brenner, Sebastian, Richter, Cornelia 11 June 2018 (has links)
Plasmacytoid dendritic cells (pDC) constitute a very rare blood cell population and play a significant role in immune response and immune-mediated disorders. Investigations on primary pDCs are hindered not only due to their rarity but also because they represent a heterogeneous cell population which is difficult to culture ex vivo. We generated a conditionally immortalized pDC line (Dox-pDC) from mice with Doxycycline-inducible SV40 Large T Antigen with a comparable immune profile to primary pDCs. The Dox-pDC secrete pro- and anti-inflammatory cytokines upon Toll-like receptor 9 stimulation and upregulate their MHCI, MHCII and costimulatory molecules. Further, the Dox-pDC activate and polarize naïve T cells in vivo and in vitro in response to the model antigen Ovalbumin. Due to their long-term culture stability and their robust proliferation Dox-pDC represent a reliable alternative to primary mouse pDC.
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Tumor-associated human dendritic cell subsets: Phenotype, functional orientation, and clinical relevancePlesca, Ioana, Müller, Luise, Böttcher, Jan P., Medyouf, Hind, Wehner, Rebekka, Schmitz, Marc 04 June 2024 (has links)
DCs play a pivotal role in orchestrating innate and adaptive antitumor immunity. Activated DCs can produce large amounts of various proinflammatory cytokines, initiate T-cell responses, and exhibit direct cytotoxicity against tumor cells. They also efficiently enhance the antitumoral properties of NK cells and T lymphocytes. Based on these capabilities, immunogenic DCs promote tumor elimination and are associated with improved survival of patients. Furthermore, they can essentially contribute to the clinical efficacy of immunotherapeutic strategies for cancer patients. However, depending on their intrinsic properties and the tumor microenvironment, DCs can be rendered dysfunctional and mediate tolerance by producing immunosuppressive cytokines and activating Treg cells. Such tolerogenic DCs can foster tumor progression and are linked to poor prognosis of patients. Here, we focus on recent studies exploring the phenotype, functional orientation, and clinical relevance of tumor-infiltrating conventional DC1, conventional DC2, plasmacytoid DCs, and monocyte-derived DCs in translational and clinical settings. In addition, recent findings demonstrating the influence of DCs on the efficacy of immunotherapeutic strategies are summarized.
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Interaktion des Frühsommer-Meningoenzephalitis- Virus mit antigenpräsentierenden Zellen / interaction of tick-borne encephalitis virus with antigen-presenting cellsDörrbecker, Bastian 17 March 2011 (has links)
No description available.
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Neurotrophin Receptor p75NTR Regulates Immune Function of Plasmacytoid Dendritic CellsBandoła, Joanna, Richter, Cornelia, Ryser, Martin, Jamal, Arshad, Ashton, Michelle P., von Bonin, Malte, Kuhn, Matthias, Dorschner, Benjamin, Alexopoulou, Dimitra, Navratiel, Katrin, Roeder, Ingo, Dahl, Andreas, Hedrich, Christian M., Bonifacio, Ezio, Brenner, Sebastian, Thieme, Sebastian 06 December 2017 (has links) (PDF)
Plasmacytoid dendritic cells (pDCs) regulate innate and adaptive immunity. Neurotrophins and their receptors control the function of neuronal tissue. In addition, they have been demonstrated to be part of the immune response but little is known about the effector immune cells involved. We report, for the first time, the expression and immune-regulatory function of the low affinity neurotrophin receptor p75 neurotrophin receptor (p75NTR) by the antigen-presenting pDCs, mediated by toll-like receptor (TLR) 9 activation and differential phosphorylation of interferon regulatory factor 3 and 7. The modulation of p75NTR on pDCs significantly influences disease progression of asthma in an ovalbumin-induced mouse model mediated by the TLR9 signaling pathway. p75NTR activation of pDCs from patients with asthma increased allergen-specific T cell proliferation and cytokine secretion in nerve growth factor concentration-dependent manner. Further, p75NTR activation of pDCs delayed the onset of autoimmune diabetes in RIP-CD80GP mice and aggravated graft-versus-host disease in a xenotransplantation model. Thus, p75NTR signaling on pDCs constitutes a new and critical mechanism connecting neurotrophin signaling and immune response regulation with great therapeutic potential for a variety of immune disorders.
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Neurotrophin Receptor p75NTR Regulates Immune Function of Plasmacytoid Dendritic CellsBandoła, Joanna, Richter, Cornelia, Ryser, Martin, Jamal, Arshad, Ashton, Michelle P., von Bonin, Malte, Kuhn, Matthias, Dorschner, Benjamin, Alexopoulou, Dimitra, Navratiel, Katrin, Roeder, Ingo, Dahl, Andreas, Hedrich, Christian M., Bonifacio, Ezio, Brenner, Sebastian, Thieme, Sebastian 06 December 2017 (has links)
Plasmacytoid dendritic cells (pDCs) regulate innate and adaptive immunity. Neurotrophins and their receptors control the function of neuronal tissue. In addition, they have been demonstrated to be part of the immune response but little is known about the effector immune cells involved. We report, for the first time, the expression and immune-regulatory function of the low affinity neurotrophin receptor p75 neurotrophin receptor (p75NTR) by the antigen-presenting pDCs, mediated by toll-like receptor (TLR) 9 activation and differential phosphorylation of interferon regulatory factor 3 and 7. The modulation of p75NTR on pDCs significantly influences disease progression of asthma in an ovalbumin-induced mouse model mediated by the TLR9 signaling pathway. p75NTR activation of pDCs from patients with asthma increased allergen-specific T cell proliferation and cytokine secretion in nerve growth factor concentration-dependent manner. Further, p75NTR activation of pDCs delayed the onset of autoimmune diabetes in RIP-CD80GP mice and aggravated graft-versus-host disease in a xenotransplantation model. Thus, p75NTR signaling on pDCs constitutes a new and critical mechanism connecting neurotrophin signaling and immune response regulation with great therapeutic potential for a variety of immune disorders.
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What’s happening where when SARS-CoV-2 infects: are TLR7 and MAFB sufficient to explain patient vulnerability?Englmeier, Ludwig, Subburayalu, Julien 20 March 2024 (has links)
The present COVID-19 pandemic has revealed that several characteristics render patients especially prone to developing severe COVID-19 disease, i.e., the male sex, obesity, and old age. An explanation for the observed pattern of vulnerability has been proposed which is based on the concept of low sensitivity of the TLR7-signaling pathway at the time of infection as a common denominator of vulnerable patient groups. We will discuss whether the concept of established TLR-tolerance in macrophages and dendritic cells of the obese and elderly prior to infection can explain not only the vulnerability of these two demographic groups towards development of a severe infection with SARS-CoV-2, but also the observed cytokine response in these vulnerable patients, which is skewed towards pro-inflammatory cytokines with a missing interferon signature.
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