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Infection history imprints prolonged changes to the epigenome, transcriptome and function of Kupffer cells
Open accessAbstract
BACKGROUND & AIMS: Liver macrophages fulfill various homeostatic functions and represent an essential line of defense against pathogenic insults. However, it remains unclear whether a history of infectious disease in the liver leads to long-term alterations to the liver macrophage compartment. METHODS: We utilized a curable model of parasitic infection invoked by the protozoan parasite Trypanosoma brucei brucei to investigate whether infection history can durably reshape hepatic macrophage identity and function. Employing a combination of fate mapping, single-cell CITE-sequencing, single-nuclei multiome analysis, epigenomic analysis, and functional assays, we studied the alterations to the liver macrophage compartment during and after the resolution of infection. RESULTS: We show that T. brucei brucei infection alters the composition of liver-resident macrophages, leading to the infiltration of monocytes that differentiate into various infection-associated macrophage populations with divergent transcriptomic profiles. Whereas infection-associated macrophages disappear post-resolution of infection, monocyte-derived macrophages engraft in the liver, assume a Kupffer cell (KC)-like profile and co-exist with embryonic KCs in the long-term. Remarkably, the prior exposure to infection imprinted an altered transcriptional program on post-resolution KCs that was underpinned by an epigenetic remodeling of KC chromatin landscapes and a shift in KC ontogeny, along with transcriptional and epigenetic alterations in their niche cells. This reprogramming altered KC functions and was associated with increased resilience to a subsequent bacterial infection. CONCLUSION: Our study demonstrates that a prior exposure to a parasitic infection induces trained immunity in KCs, reshaping their identity and function in the long-term. IMPACT AND IMPLICATIONS: Although the liver is frequently affected during infections, and despite housing a major population of resident macrophages known as Kupffer cells (KCs), it is currently unclear whether infections can durably alter KCs and their niche cells. Our study provides a comprehensive investigation into the long-term impact of a prior, cured parasitic infection, unveiling long-lasting ontogenic, epigenetic, transcriptomic and functional changes to KCs as well as KC niche cells, which may contribute to KC remodeling. Our data suggest that infection history may continuously reprogram KCs throughout life with potential implications for subsequent disease susceptibility in the liver, influencing preventive and therapeutic approaches.
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During chronic liver injury, large numbers of bone marrow monocytes are recruited to the liver, where they differentiate into MDMs, which can be found throughout the liver, including within the KC niche of the liver sinusoids.
“However, during chronic liver injury, large numbers of bone marrow monocytes are recruited to the liver, where they differentiate into MDMs, which can be found throughout the liver, including within the KC niche of the liver sinusoids.”
From Targeting macrophages in liver fibrosis (2026) · cites this paper as [92]
MDMs represent a heterogeneous population that can adopt diverse functional states and fates depending on the inflammatory context, niche, and duration of injury.
“As such, MDMs represent a heterogeneous population that can adopt diverse functional states and fates depending on the inflammatory context, niche, and duration of injury (36, 37, 92, 94, 103–106).”
From Targeting macrophages in liver fibrosis (2026) · cites this paper as [92]
Monocyte-derived macrophage infiltration profoundly reshapes the Kupffer cell compartment.
“Conversely, MoMFs infiltration profoundly reshapes the KCs compartment (31, 32).”
From Macrophage duality in liver diseases: heterogeneity, plasticity, and the quest for precision therapeutics (2026) · cites this paper as [31]
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Metadata
- Authors
- Musrati, M. A., Stijlemans, B., Azouz, A., Kancheva, D., Mesbahi, S., Hadadi, E., Lebegge, E., Ali, L., De Vlaminck, K., Scheyltjens, I., Vandamme, N., Zivalj, M., Assaf, N., Elkrim, Y., Ahmidi, I., Huart, C., Lamkanfi, M., Guilliams, M., De Baetselier, P., Goriely, S., Movahedi, K., & Van Ginderachter, J. A.
- Affiliations
- Vrije Universiteit Brussel (BE)
- Université Libre de Bruxelles (BE)
- VIB-UGent Center for Inflammation Research (BE)
- Ghent University (BE)
- Vlaams Instituut voor Biotechnologie (BE)
- Corresponding author
- Movahedi, Kiavash
- ORCID
- Venue
- Journal of Hepatology
- Publisher
- Elsevier BV
- Published
- 2024-12
- Volume
- 81
- Issue
- 6
- Pages
- 1023-1039
- ISSN
- 0168-8278 (ISSN-L)
- OpenAlex
- W4400521396
- Cited by
- 21
- References
- 53
- Citations by year
- 2026: 9 · 2025: 11 · 2024: 1
- FWCI
- 3.52
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Licence
- Locations
- Journal of Hepatology (publishedVersion, cc-by-nc-nd)
- PubMed (publishedVersion)
- VUBIR (Vrije Universiteit Brussel) (submittedVersion)
- Ghent University Academic Bibliography (Ghent University) (submittedVersion, cc-by-nc-nd)
- Dépôt institutionnel de l'Université libre de Bruxelles (Université Libre de Bruxelles) (submittedVersion, other-oa)
- Lirias (submittedVersion, cc-by-nc-nd)
- Funders
- Waalse Gewest
- European Resuscitation Council
- FWO (1157718N, IBOF-21-043)
- ERDF
- Topics
- Life Sciences › Immunology and Microbiology › Immunology › Immune responses and vaccinations
- Life Sciences › Immunology and Microbiology › Immunology › Immune cells in cancer
- Health Sciences › Medicine › Hepatology › Liver physiology and pathology
- Keywords
- Kupffer cells, infection history, Trypanosoma brucei brucei, parasitic liver infection, trained immunity, epigenetic remodeling, chromatin landscape, monocyte-derived macrophages, macrophage ontogeny, transcriptome, bacterial infection susceptibility
- MeSH terms
- Epigenome, Animals, Disease Models, Animal, Kupffer Cells, Liver, Macrophages, Trypanosoma brucei brucei, Trypanosomiasis, Mice, Transcriptome
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