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Peripheral blood leucocyte subpopulations in patients splenectomized for trauma
A Ferrante1, P A Drew, G K Kiroff
1University Department of Paediatrics, Adelaide Children's Hospital, South Australia.
Clinical and Experimental Immunology
|October 1, 1987
Summary
Splenectomy alters immune cell populations in peripheral blood, decreasing T cells and increasing B lymphocytes and monocytes. These changes may explain reduced immune responses after spleen removal.
Area of Science:
- Immunology
- Hematology
Background:
- The spleen plays a crucial role in immune regulation and filtering blood.
- Splenectomy, or spleen removal, can significantly impact immune cell dynamics and function.
Purpose of the Study:
- To investigate the effects of splenectomy on leucocyte subpopulations in peripheral blood mononuclear leucocytes (MNL).
- To understand how these changes might relate to altered immune responses post-splenectomy.
Main Methods:
- Utilized monoclonal antibodies for immunophenotyping of leucocyte subpopulations.
- Analyzed peripheral blood mononuclear leucocytes (MNL) from patients who underwent splenectomy due to trauma.
Main Results:
- Significantly decreased proportions of T cells (OKT3+) and T helper/inducer cells (OKT4+).
- Significantly decreased OKT4+/OKT8+ T cell ratio, but increased absolute numbers of T cells.
- Significantly increased percentage of B lymphocytes (Ig+, FMC1+) and monocytes (FMC33+).
Conclusions:
- Splenectomy leads to significant shifts in peripheral blood leucocyte composition, including reduced T cell proportions and increased B cells and monocytes.
- These alterations in immune cell populations may contribute to the observed depressed mitogen responses in splenectomized individuals.