Effect of Pregnancy Specific beta 1-Glycoprotein on the Replicative Potential of Naive T Cells and Immune Memory T Cells

摘要

We studied the effects of pregnancy-specific 01-glycoprotein (PSG) on the replicative potential of naive T cells (CD45RA(+)) and immune memory T cells (CD45R0(+)) in vitro by evaluating the expression of the hTERT gene in combination with the proliferative activity of cells. Human PSG was obtained by the author's patented method of immunopurification using a biospecific sorbent with subsequent removal of immunoglobulin contamination on a HiTrap Protein G HP column. We used monocultures of CD45RA(+) and CD45R0+ lymphocytes isolated from peripheral blood mononuclear cells of reproductive-age women. It was found that PSG in physiological concentrations inhibited the expression of the hTERT gene mRNA in naive T cells and immune memory T cells and simultaneously reduced the number of proliferating T cells estimated by the differential gating method. At the same time, PSG reduced CD71 expression only on naive T cells without affecting this molecule on immune memory T cells. Thus, PSG decreased the replication potential and suppressed the proliferation of T cells and immune memory T cells, which in the context of pregnancy can contribute to the formation of immune tolerance to the semi-allogeneic embryo.