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Immunologic alterations in the third trimester of pregnancy
I Teodorescu-Exarcu1, M Rotaru, V Diaconu
1Gh. Marinescu Hospital, Department of Physiopathology, IMF, Bucharesl.
Physiologie (Bucarest)
|July 1, 1987
Summary
This study examined immune system changes during pregnancy, finding significant alterations in white blood cell counts and immune cell proportions. These findings offer insights into the maternal immune response to the fetus during gestation.
Area of Science:
- Immunology
- Obstetrics
- Cell Biology
Background:
- Pregnancy involves complex maternal immune adaptations to tolerate the semi-allogeneic fetus.
- Understanding these immunological shifts is crucial for managing pregnancy health and complications.
Purpose of the Study:
- To investigate specific changes in immune cell populations and complement system activity during pregnancy.
- To correlate these immunological parameters with the maternal-fetal relationship, specifically the concept of the ovo-embryo-fetal allograft.
Main Methods:
- Analysis of leukocyte and lymphocyte counts in 61 pregnant women (21-41 weeks gestation) and 9 nonpregnant controls.
- Quantification of T cell rosettes (T1, T2), B cells (EAC rosettes), killer cells (EACD rosettes), and NBT-positive phagocytes.
- Measurement of serum immunoglobulin (IgG, IgA, IgM) concentrations and C3 complement component levels, along with 50% hemolytic complement activity.
Main Results:
- Significant alterations observed in leukocyte and lymphocyte counts during pregnancy.
- Changes noted in the proportions of T cells, B cells, and killer cells, indicating dynamic immune cell shifts.
- Variations in serum immunoglobulin levels and complement system activity were detected throughout gestation.
Conclusions:
- Pregnancy is associated with profound, measurable changes in the maternal immune system, including cell counts and complement function.
- These immunological modifications are likely essential for the successful acceptance and development of the fetal allograft.
- Further research can elucidate the precise mechanisms governing these pregnancy-induced immune adaptations.
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