[Immunologic potency of pregnancy associated alpha 2-glycoprotein (alpha 2-PAG)].

The suggestion that the pregnancy-associated alpha2-glycoprotein could depress the immune response was investigated using the modified electrophoretic mobility test. The presence of the glycoprotein, at physiological levels, significantly reduced the inhibition of the migration velocity of indicator cells in the electric field caused by the MSF. In the contrary alpha2-PAG-free serum had no effect in the test system. Therefore, it can be supposed that alpha2-PAG may have an immunoregulatory function within the immunological mechanism which protects the conceptus and malignant tumor.