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Characterization of interstitial dendritic cells in human liver
T C Prickett1, J L McKenzie, D N Hart
1Department of Haematology, Christchurch Hospital, New Zealand.
Transplantation
|November 1, 1988
Summary
This study identifies unique dendritic cells (DCs) in the human liver, distinct from Kupffer cells. These liver DCs, found in portal tracts, express specific antigens and may play a role in immune responses like graft-versus-host disease.
Area of Science:
- Immunology
- Cell Biology
- Histopathology
Background:
- Kupffer cells and interstitial dendritic cells (DCs) are key immune cells in the human liver.
- Understanding their distinct phenotypes is crucial for comprehending liver immunity and disease.
Purpose of the Study:
- To characterize the immunophenotype of human liver dendritic cells (DCs) and Kupffer cells.
- To compare liver DCs with other dendritic cell populations.
Main Methods:
- Utilized immunofluorescence and immunoperoxidase techniques on human liver cryostat sections.
- Tested a broad panel of monoclonal antibodies against various cell surface markers.
- Identified leukocyte common antigen (CD45) positive cells with dendritic morphology.
Main Results:
- Identified interstitial DCs in portal tracts expressing HLA-DP, DQ, and DR antigens.
- Kupffer cells showed weaker staining for anti-class-II reagents compared to DCs.
- Liver DCs expressed LFA-1 but lacked markers like CD11b, CD11c, and T/B cell antibodies; some myeloid antibodies stained DCs.
- A second DC population was found in the liver capsule with a similar phenotype.
Conclusions:
- Human liver interstitial DCs possess a unique immunophenotype, distinct from Kupffer cells.
- These findings support the existence of a unique hematopoietic lineage for dendritic cells.
- The presence of DCs in portal triads suggests a role in initiating T cell responses, relevant to graft-versus-host disease and allograft rejection.