Cytokine production of in vitro stimulated peripheral lymphocytes during the course of pregnancy and pseudopregnancy in the rat

American Journal of Reproductive Immunology : AJRI
Marijke M FaasP Vos

Abstract

Does maternal lymphocyte cytokine production after in vitro stimulation vary with the stage of pregnancy in the rat? Blood samples were taken during the estrus cycle in rats (n = 11). Thereafter, rats were rendered pregnant (n = 6) or pseudopregnant (n = 5) and blood samples were taken at days 4, 8, 11, 15, and 20 of pregnancy and pseudopregnancy. White blood cell (WBC) count was measured and whole blood was stimulated with phorbol 12-myristate 13-acetate and calcium ionophore; interferon-gamma (IFNgamma) and interleukin-4 (IL-4) production as well as (sub)populations of lymphocytes were measured using flow cytometry. We observed an increase of WBC in the second week of pregnancy and a slowly decreasing percentage of lymphocytes during the course of pregnancy. The percentage IFNgamma producing T-lymphocytes after in vitro stimulation was increased during pregnancy (for Th-lymphocytes only in the second week of pregnancy, for Tc-lymphocytes at all days). This increased IFNgamma production in pregnant T-lymphocytes was accompanied by an increase during pseudopregnancy, and therefore may result from increased sex hormone concentrations. The percentage IFNgamma producing natural killer (NK) cells after in vitro stimulation was decr...Continue Reading

References

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