Vaclav Gergelits
vaclavg.bsky.social
Vaclav Gergelits
@vaclavg.bsky.social
Reposted by Vaclav Gergelits
Turns out our “resident” immune cells are more like Airbnb guests than homeowners 🧳🧬

A new preprint by @labliston.bsky.social shows that lymphocytes check in and out of tissues much more frequently than previously thought—the gut and liver are the hotspots. 🧠🛏️🧪

doi.org/10.1101/2025...
doi.org
July 9, 2025 at 3:11 PM
Reposted by Vaclav Gergelits
I'm excited about a new @biorxivpreprint.bsky.social story that just went live! This one takes a #computational #immunology approach to understanding #tissueresident lymphocytes. The story highlights the extra value mathematical modelling can bring to biology. 🧵1/10

www.biorxiv.org/content/10.1...
Probabilistic migration events drive transient tissue residency of lymphocytes during homeostasis
Tissue-resident lymphocytes form a phenotypically and functionally distinct analog to the corresponding circulatory lymphocyte populations. Residential CD8 T cells, in particular, are identified as having prolonged residence in the tissues and key functions in recall responses at tissue-environmental interfaces, although the dwell time in individual tissues has yet to be resolved. Residential CD4 T cells, regulatory T cells, B cells, and NK cells have been demonstrated to share phenotypic properties with residential CD8 T cells, but the migratory kinetics are even more poorly defined. Here we used probabilistic modelling on a large parabiosis dataset, covering multiple time-points and tissues, to calculate migration kinetics and dwell times of multiple lymphocyte subsets across a diverse set of tissues. Markov chain modelling identified distinct cell type-specific and tissue-specific residency patterns. The liver and gut were prone to prolonged residency compared to other tissue types, and a hierarchy of residency was observed with CD8 T cells and NK cells demonstrating longer residency than CD4 conventional T cells and regulatory T cells, which in turn resided in tissues longer than B cells. With few exceptions, however, average residency was at least an order of magnitude shorter than the life-span of the mouse, indicating a more dynamic form of steady-state tissue residency than usually assumed. Together these data provide a comprehensive model of a pan-tissue shared program in lymphocyte tissue residence, as well as identifying cell type- and organ-specific modification of the migratory kinetics. ### Competing Interest Statement The authors have declared no competing interest. Wellcome Trust, https://ror.org/029chgv08, 222442/Z/21/Z European Research Council, TissueTreg
www.biorxiv.org
July 9, 2025 at 8:17 AM