Long‐lasting changes in circulating dendritic cell and monocyte subsets, and altered expression of EMR2, CD97 and EMR3 on these cells in the posttraumatic course
Abstract Objectives Traumatic injury triggers the rapid release of damage‐associated patterns (DAMPs). Dendritic cells (DCs) and monocytes play key roles in sensing, processing, and presenting DAMPs to naïve T cells. These heterogeneous immune cells express the adhesion GPCR EMR2/ADGRE2, which is li...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2025-01-01
|
| Series: | Clinical & Translational Immunology |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/cti2.70040 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849683270482001920 |
|---|---|
| author | Leyu Zheng Carolin Fuchs Christian Kleber Georg Osterhoff Gabriela Aust |
| author_facet | Leyu Zheng Carolin Fuchs Christian Kleber Georg Osterhoff Gabriela Aust |
| author_sort | Leyu Zheng |
| collection | DOAJ |
| description | Abstract Objectives Traumatic injury triggers the rapid release of damage‐associated patterns (DAMPs). Dendritic cells (DCs) and monocytes play key roles in sensing, processing, and presenting DAMPs to naïve T cells. These heterogeneous immune cells express the adhesion GPCR EMR2/ADGRE2, which is likely regulated by DAMPs. Methods We analysed the various blood DC and monocyte subsets in trauma patients and uninjured volunteers using flow cytometry. EMR2 and its closest relatives, CD97/ADGRE5 and EMR3/ADGRE3, were quantified on these subsets to gain insights into their (patho)physiological regulation. Results Following trauma, conventional and plasmocytoid DCs nearly disappeared from the circulation, which is inversely correlated with injury severity and adverse clinical parameters 120–240 h post injury. Alterations in EMR2 and CD97 on DCs were relatively minor. Classical monocytes increased, while non‐classical monocytes showed a sustained decline in both absolute number and percentage, in a manner dependent on injury severity after trauma. EMR2 expression increased across all monocyte subsets, whereas CD97 showed little change. EMR3 expression decreased and remained low in classical monocytes, while it markedly increased in non‐classical monocytes. These temporal patterns in adhesion GPRC expression were largely independent of injury severity and were observed in all injured patients. Conclusion Circulating DC and monocyte subsets underwent significant compositional changes after trauma, often correlating with injury severity and other clinical parameters. Despite structural similarities, EMR2, CD97, and EMR3 showed distinct regulatory patterns on monocyte subsets, suggesting different functional roles in the immune response to injury. |
| format | Article |
| id | doaj-art-e67ab7e9762141ffa833e57233a88fed |
| institution | DOAJ |
| issn | 2050-0068 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Clinical & Translational Immunology |
| spelling | doaj-art-e67ab7e9762141ffa833e57233a88fed2025-08-20T03:23:57ZengWileyClinical & Translational Immunology2050-00682025-01-01146n/an/a10.1002/cti2.70040Long‐lasting changes in circulating dendritic cell and monocyte subsets, and altered expression of EMR2, CD97 and EMR3 on these cells in the posttraumatic courseLeyu Zheng0Carolin Fuchs1Christian Kleber2Georg Osterhoff3Gabriela Aust4Research Laboratories and Department of Orthopaedics, Trauma and Plastic Surgery Leipzig University and University Hospital Leipzig Leipzig GermanyResearch Laboratories and Department of Orthopaedics, Trauma and Plastic Surgery Leipzig University and University Hospital Leipzig Leipzig GermanyResearch Laboratories and Department of Orthopaedics, Trauma and Plastic Surgery Leipzig University and University Hospital Leipzig Leipzig GermanyResearch Laboratories and Department of Orthopaedics, Trauma and Plastic Surgery Leipzig University and University Hospital Leipzig Leipzig GermanyResearch Laboratories and Department of Orthopaedics, Trauma and Plastic Surgery Leipzig University and University Hospital Leipzig Leipzig GermanyAbstract Objectives Traumatic injury triggers the rapid release of damage‐associated patterns (DAMPs). Dendritic cells (DCs) and monocytes play key roles in sensing, processing, and presenting DAMPs to naïve T cells. These heterogeneous immune cells express the adhesion GPCR EMR2/ADGRE2, which is likely regulated by DAMPs. Methods We analysed the various blood DC and monocyte subsets in trauma patients and uninjured volunteers using flow cytometry. EMR2 and its closest relatives, CD97/ADGRE5 and EMR3/ADGRE3, were quantified on these subsets to gain insights into their (patho)physiological regulation. Results Following trauma, conventional and plasmocytoid DCs nearly disappeared from the circulation, which is inversely correlated with injury severity and adverse clinical parameters 120–240 h post injury. Alterations in EMR2 and CD97 on DCs were relatively minor. Classical monocytes increased, while non‐classical monocytes showed a sustained decline in both absolute number and percentage, in a manner dependent on injury severity after trauma. EMR2 expression increased across all monocyte subsets, whereas CD97 showed little change. EMR3 expression decreased and remained low in classical monocytes, while it markedly increased in non‐classical monocytes. These temporal patterns in adhesion GPRC expression were largely independent of injury severity and were observed in all injured patients. Conclusion Circulating DC and monocyte subsets underwent significant compositional changes after trauma, often correlating with injury severity and other clinical parameters. Despite structural similarities, EMR2, CD97, and EMR3 showed distinct regulatory patterns on monocyte subsets, suggesting different functional roles in the immune response to injury.https://doi.org/10.1002/cti2.70040CD97dendritic cellsEMR2EMR3monocyte subsettraumatic injury |
| spellingShingle | Leyu Zheng Carolin Fuchs Christian Kleber Georg Osterhoff Gabriela Aust Long‐lasting changes in circulating dendritic cell and monocyte subsets, and altered expression of EMR2, CD97 and EMR3 on these cells in the posttraumatic course Clinical & Translational Immunology CD97 dendritic cells EMR2 EMR3 monocyte subset traumatic injury |
| title | Long‐lasting changes in circulating dendritic cell and monocyte subsets, and altered expression of EMR2, CD97 and EMR3 on these cells in the posttraumatic course |
| title_full | Long‐lasting changes in circulating dendritic cell and monocyte subsets, and altered expression of EMR2, CD97 and EMR3 on these cells in the posttraumatic course |
| title_fullStr | Long‐lasting changes in circulating dendritic cell and monocyte subsets, and altered expression of EMR2, CD97 and EMR3 on these cells in the posttraumatic course |
| title_full_unstemmed | Long‐lasting changes in circulating dendritic cell and monocyte subsets, and altered expression of EMR2, CD97 and EMR3 on these cells in the posttraumatic course |
| title_short | Long‐lasting changes in circulating dendritic cell and monocyte subsets, and altered expression of EMR2, CD97 and EMR3 on these cells in the posttraumatic course |
| title_sort | long lasting changes in circulating dendritic cell and monocyte subsets and altered expression of emr2 cd97 and emr3 on these cells in the posttraumatic course |
| topic | CD97 dendritic cells EMR2 EMR3 monocyte subset traumatic injury |
| url | https://doi.org/10.1002/cti2.70040 |
| work_keys_str_mv | AT leyuzheng longlastingchangesincirculatingdendriticcellandmonocytesubsetsandalteredexpressionofemr2cd97andemr3onthesecellsintheposttraumaticcourse AT carolinfuchs longlastingchangesincirculatingdendriticcellandmonocytesubsetsandalteredexpressionofemr2cd97andemr3onthesecellsintheposttraumaticcourse AT christiankleber longlastingchangesincirculatingdendriticcellandmonocytesubsetsandalteredexpressionofemr2cd97andemr3onthesecellsintheposttraumaticcourse AT georgosterhoff longlastingchangesincirculatingdendriticcellandmonocytesubsetsandalteredexpressionofemr2cd97andemr3onthesecellsintheposttraumaticcourse AT gabrielaaust longlastingchangesincirculatingdendriticcellandmonocytesubsetsandalteredexpressionofemr2cd97andemr3onthesecellsintheposttraumaticcourse |