[Comparative study of the antiproliferative action of placental interferons]

The antiproliferative activity of placenta interferons (amniotic, chorional) prepared at the Institute of Experimental Morphology, Academy of Sciences of the Georgian SSR, was studied. Amniotic interferon was found to be most active in tumor cell cultures of human origin. Placenta interferons showed lower antiproliferative activity in continuous monkey and hamster kidney cell cultures and primary human embryo fibroblast cultures.