title: Reactivity in neoplasia, preneoplasia, and pregnancy of lymphocytes against fetal extracts: cross-reactions between man and mouse.
abstract: KCl extracts (3 M) from human fetuses were tested by macrophage electrophoretic mobility (MEMB), leukocyte migration inhibition, and/or leukocyte adherence inhibition techniques against lymphocytes-leukocytes from tumor-bearing humans and control persons. A positive MEMB test was found in 209 of 284 (73%) patients with various types of clinically manifest tumors. Only 15 of 134 (11%) controls gave a positive reaction by the MEMB test. Leukocyte migration was significantly inhibited in 48 of 64 (75%) tumor patients, and leukocyte adherence was significantly inhibited in 40 of 50 (80%) tumor patients versus 7 of 50 (14%) and 10 of 54 (19%) in the corresponding controls. Lymphocyte reactivity to fetal extracts is also detectable in inbred XVII/Bln, CBA/Bln, and C3H/Bln mice bearing spontaneous or transplanted tumors of different etiology. Human and mouse fetal extracts gave cross-reactions. Lymphocytes from tumor-bearing mice were reactive against fetal extracts from the cow, pig, sheep, guinea pig, cat, and chicken. Mice bearing benign skin warts induced by 7,12-dimethylbenz[a]anthracene (DMBA) as well as DMBA-treated mice without visible skin lesions gave a positive MEMB test. Likewise, pregnancy is associated with lymphocyte reactivity to fetal extracts.
mesh_terms: D000818:Animals; D000951:Antigens, Neoplasm / Q000276:immunology; D002415:Cats; D002417:Cattle; D002464:Cell Migration Inhibition; D002642:Chick Embryo; D003429:Cross Reactions; D005260:Female; D005333:Fetus / Q000276:immunology*; D006168:Guinea Pigs; D006801:Humans; D008214:Lymphocytes / Q000276:immunology*; D008264:Macrophages / Q000276:immunology; D051379:Mice; D008809:Mice, Inbred C3H; D008808:Mice, Inbred CBA; D009369:Neoplasms / Q000276:immunology*; D009374:Neoplasms, Experimental / Q000276:immunology; D011230:Precancerous Conditions / Q000276:immunology; D011247:Pregnancy; D012756:Sheep
chemical_list: D000951:Antigens, Neoplasm