Immunogenic cell death of dendritic cells following modified vaccinia virus Ankara infection enhances CD8
| Autor: | Kim A, Tappe, Ramachandramouli, Budida, Metodi V, Stankov, Theresa, Frenz, Harshit, R Shah, Asisa, Volz, Gerd, Sutter, Ulrich, Kalinke, Georg M N, Behrens |
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| Rok vydání: | 2018 |
| Předmět: |
Cytotoxicity
Immunologic Cell Death Bone Marrow Cells Mice Transgenic Vaccinia virus Viral Vaccines Dendritic Cells Adaptive Immunity CD8-Positive T-Lymphocytes Mice Inbred C57BL Mice Adenosine Triphosphate Cross-Priming Autophagy Vaccines DNA Animals Humans Receptors Purinergic P2X7 Cells Cultured Cell Proliferation Smallpox |
| Zdroj: | European journal of immunology. 48(12) |
| ISSN: | 1521-4141 |
| Popis: | "Immunogenic cell death" (ICD) is associated with the emission of so-called damage-associated molecular patterns (DAMPs) which trigger the immune response against dead-cell associated antigens. The secretion of the DAMP, adenosine triphosphate (ATP) has been shown to be autophagy-dependent. Here, we demonstrate that Modified Vaccinia virus Ankara (MVA), a highly attenuated strain of vaccinia virus, induces both cell death and autophagy in murine bone marrow-derived dendritic cells (BMDCs), which in turn confer the (cross-)priming of OVA-specific cytotoxic T cells (OT-I cells). Additionally, we show that MVA infection leads to increased extracellular ATP (eATP) as well as intracellular ATP (iATP) levels, with the latter being influenced by the autophagy. Furthermore, we show that the increased eATP supports the proliferation of OT-I cells and inhibition of the P2RX7 receptors results in an abrogation of the proliferation. These data reveal novel mechanisms on how MVA enhances adaptive immunity in vaccine strategies. |
| Databáze: | OpenAIRE |
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