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95% unseres weltweiten Datenverkehrs werden von Unterseekabeln transportiert, nur ein Bruchteil über Satelliten (~5%). Das macht sie zu einer zentralen, kritischen Infrastruktur. Die Kabel verbinden Menschen und Regierungen, ermöglichen eine globale Datenkommunikation und damit auch unsere moderne und vernetzte Gesellschaft. Das derzeitige, alltägliche Leben vieler Menschen wäre ohne diese Kabel nicht möglich. Ein moderner Staat und seine Armee wären nicht handlungsfähig...
The prefix cyber, prepended onto terms like war, peace, security, and so on, results in interesting word combinations which we construct with our spoken language. Many scholars, from political to social science, have discussed the terms and the semantics of it in order to understand the problem and to create some scientific value out of it. But this article will not be another endless discussion on whether cyberfoo exists somewhere in any computer network at the moment or not...
Activated SUMOylation restricts MHC class I antigen presentation to confer immune evasion in cancer
(2022)
Activated SUMOylation is a hallmark of cancer. Starting from a targeted screening for SUMO-regulated immune evasion mechanisms, we identified an evolutionarily conserved function of activated SUMOylation, which attenuated the immunogenicity of tumor cells. Activated SUMOylation allowed cancer cells to evade CD8+ T cell–mediated immunosurveillance by suppressing the MHC class I (MHC-I) antigen-processing and presentation machinery (APM). Loss of the MHC-I APM is a frequent cause of resistance to cancer immunotherapies, and the pharmacological inhibition of SUMOylation (SUMOi) resulted in reduced activity of the transcriptional repressor scaffold attachment factor B (SAFB) and induction of the MHC-I APM. Consequently, SUMOi enhanced the presentation of antigens and the susceptibility of tumor cells to CD8+ T cell–mediated killing. Importantly, SUMOi also triggered the activation of CD8+ T cells and thereby drove a feed-forward loop amplifying the specific antitumor immune response. In summary, we showed that activated SUMOylation allowed tumor cells to evade antitumor immunosurveillance, and we have expanded the understanding of SUMOi as a rational therapeutic strategy for enhancing the efficacy of cancer immunotherapies.