Abstract: Trophoblastic .beta.-I-glycoprotein (TBG) is used as a means for treating autoimmune diseases showing suppressors immunodeficit.A method of treating of autoimmune diseases comprises the administration of an immune correcting preparation, said preparation being trophoblastic .beta.-I-glycoprotein (TBG), indications with respect to said preparation being determined by testing TBG sensitivity of mononuclear cells (MNCs).

Abstract: The method for determining a suppressor component of human immune status comprises collecting peripheral blood, obtaining a suspension of mononuclear cells (MNCs), dividing said suspension into two equal portions, cultivating MNCs in the first portion without a suppressor activator, cultivating MNCs in the second portion with said suppressor activator (TBG), washing MNCs out of culture medium, blocking the proliferation, adding newly isolated MNCs from a normal donor, which MNCs have been stimulated with phytohemagglutinin, into each of MNC portions in equal proportions to obtain test cultures, cultivating said test cultures, further evaluating the proliferation in said test cultures and determining the suppression value on the basis of the ratios of proliferation levels in test cultures.