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[The CIVIS Newsroom ](https://civis.eu/sv/the-civis-newsroom) 2. The immune cells never rest and are ready for action when needed, PLUS study reveals The immune cells never rest and are ready for action when needed, PLUS study reveals ====================================================================================== CIVIS Highlights 24 maj 2024 Our immune system never takes a break, even if we are healthy, as it is permanently stimulated by healthy tissue. The finding, published in the [Nature Immunology](https://www.nature.com/articles/s41590-024-01804-1) journal, could be used to future develop drugs that specifically increase the alertness of our immune system. ![](/storage/files/picture-1-nikolaus-fortelny-christoph-bock-c-klaus-pichler-cemm-2.jpg) *PLUS Assistant Professor Nikolaus Fortelny & Medical University of Vienna's Christoph Bock | © Klaus Pichler / CeMM* When pathogens invade the body, the immune system must respond immediately to prevent or contain infection. But how do our immune cells stay ready when there is no attacker in sight? Scientists in Vienna and Salzburg, including PLUS Assistant Professor Nikolaus Fortelny, have come up with a fascinating explanation: they are stimulated by healthy tissue. This means that they never rest and are immediately ready for action when needed. How the immune system works --------------------------- Communication is crucial in immune defence: when a virus infects a cell, for example, the cell releases signalling molecules. This alerts defence cells, and our entire immune system is activated within a very short time. Immune cells process these signals in particular via the JAK-STAT signalling pathway - named after Janus, the two-headed Roman god of the beginning and the end. This signalling pathway acts like a direct line from signal recognition to the nucleus of the defence cells, where it activates a series of genes and sets the cells into attack mode. But even if there is no present danger, our defence cells must always be vigilant. At the same time, they must not cause any damage through unnecessary activity, as is the case with autoimmune diseases. How our defence cells maintain this balance was poorly understood so far. But a team of [Viennese research groups](http://www.jak-stat.at) including Professor Nikolaus Fortelny from the Department of Biosciences and Medical Biology at PLUS has now presented an explanation: > *The same JAK-STAT signalling pathway that activates the defence cells during an infection also keeps them on standby. The defence cells therefore only need to increase the intensity of the signalling pathway in the event of an infection; this is much faster than switching a signalling pathway on again completely”,* explains Christoph Bock, Principal Investigator at CeMM and Professor at MedUni Vienna. Taking into consideration that the genes of the JAK-STAT signalling pathway are sometimes pathologically altered in people with immune disorders and cancer, this research therefore also provides potential approaches for new therapies. **Learn more about the study from the [full article](https://www.plus.ac.at/news/immunzellen-in-den-startloechern-allzeit-bereit-ist-harte-arbeit/), in German.** Related news ------------ - [ ![](https://civis.eu/storage/files/euko-at-bild-800x600.jpg?token=8b0e68266375a76c6818dc87522df43f)How young people in Austria use AI CIVIS Highlights 23 februari 2026 ](https://civis.eu/sv/the-civis-newsroom/how-young-people-in-austria-use-ai) - [ ![](https://civis.eu/storage/files/internationalisation-800x600.png?token=e1b39583bd55dd3a1eea12a2c04d207d)University of Salzburg wins Internationalisation Award for Staff Mobility and Development CIVIS Highlights 17 december 2025 ](https://civis.eu/sv/the-civis-newsroom/university-of-salzburg-wins-internationalisation-award-for-staff-mobility-and-development) - [ ![](https://civis.eu/storage/files/satelite-image-800x600.jpg?token=e6954cf1dbd14132e641dd6fb1b92d1d)Earth observation and geoinformatics empower humanitarian response CIVIS Highlights 11 september 2025 ](https://civis.eu/sv/the-civis-newsroom/earth-observation-and-geoinformatics-empower-humanitarian-response) [Upptäck alla våra berättelser](https://civis.eu/sv/the-civis-newsroom) [ CIVIS Student Council gathers in Lausanne to advance student-led projects ](< https://civis.eu/sv/the-civis-newsroom/civis-student-council-gathers-lausanne-to-advance-student-led-projects >) [ Stockholm University signs declaration on open research information ](< https://civis.eu/sv/the-civis-newsroom/stockholm-university-signs-declaration-on-open-research-information >) ![CIVIS – Europe’s Civic University Alliance](https://civis.eu/build/assets/civis-CCpvK1nT.svg) ------------------------------------------------------------------------------------------------- Europe’s Civic University Alliance ![Co-funded by the European Union](https://civis.eu/build/assets/co-funded-by-the-european-union-DSKLW1us.png)Views and opinions expressed do not necessarily reflect those of the European Union or the European Education and Culture Executive Agency (EACEA). 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