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PubMed1988

Cyclosporin A prevents sensitization after blood transfusion in multiparous rats.

1. Humoral immune responses to allogeneic blood transfusions and semi-allogeneic pregnancies were monitored by the indirect haemagglutination assay in strains of inbred rats. 2. Similar titres and ranges of cross-reactive alloantibodies were induced by blood transfusions and pregnancy; the maternal alloantibody response to paternal antigens was not increased by an unrelated antigenic stimulus. 3. Immunosuppression with cyclosporin A was effective in preventing the primary humoral immune response produced by blood transfusion but not in abrogating the established immune response to previous pregnancy. 4. These studies have established an animal model of sensitization that both stimulates the clinical situation of many potential renal transplant recipients and permits analyses of the different antigenic stimuli involved.

Animals↗
PubMed1981

Production of foetally stimulated lymphocytotoxic antibodies by multiparous cows.

Serum samples were collected monthly from second gestation cows and examined for the presence of lymphocytotoxic antibodies. Of 25 cows studied 16 (64%) raised antibodies during or immediately after second gestation. Ten of these cows (40%) raised antibodies during gestation, some as early as 5 months before parturition. Reactors which had had first-gestation reactivity responded earlier, but had peak antibody titers no higher than cows without observable first gestation reactions. Cows with antibodies of similar specificity in the first two gestations responded earlier than those with different antibody specificities. Regardless of the time of first antibody detrection, peak titers were usually achieved during the first month postpartum. Antibody persistence increased with parity. Among cows of all ages sampled at random times, there was a linear relationship of serum reactivity to cow age.

Animals↗