Correlation of extracts obtained by high efficiency gel chromatography of lactic dehydrogenase virus infected mouse serum and cytosol from human tumors using leukocyte adherence inhibition assay.

Immunochemically active fractions were obtained using Separon Hema-300-glc(R) from serum of lactic dehydrogenase virus (LDV) infected mice and from homogenates of human tumors. The mixture of proteins of tumorous origin from the cytosol giving a positive reaction in the leukocyte adherence inhibition (LAI) test was found in the same fractions showing maximum of absorbance at 340 nm in the spectrophotometer and a corresponding peak in the refractometer. Analogous peaks were not proved in material obtained from healthy controls, but they were found in some human placentas and fetal organs. The LDV fraction obtained from mouse serum served as a "control" antigen in LAI test for human tumor testing, and results corresponded with those obtained using cytosol specific for the tumor under study.