title: Active immunization to luteinizing hormone releasing hormone to inhibit the induction of mammary tumors in the rat.
abstract: Immunization of female rats with a bovine serum albumin-luteinizing hormone releasing hormone conjugate results in suppression of dimethylbenzanthracene mammary tumor incidence. Tumor incidence was 1.3, and 1.29 tumors per rat in bovine serum albumin alone (n = 10) and unimmunized (n = 18) control groups, but no tumors were found in the bovine serum albumin-luteinizing hormone releasing hormone conjugate immunized animals (n = 10). In a second experiment immunization with bovine serum albumin-luteinizing hormone releasing hormone conjugates reduced tumor incidence to 0.3 tumors per rat (n = 10) from the 1.2 tumors per animal seen in the control animals (n = 10) immunized with bovine serum albumin alone. Bovine serum albumin-luteinizing hormone immunization caused the production of anti-LHRH antibodies, an interruption of estrous cycles, lowered serum estradiol and progesterone levels, and atrophy of the ovaries and uteri. Immunization BSA-hormone conjugates is a novel anti-tumor strategy.
mesh_terms: D015127:9,10-Dimethyl-1,2-benzanthracene; D000818:Animals; D004958:Estradiol / Q000097:blood; D004971:Estrus; D005260:Female; D007987:Gonadotropin-Releasing Hormone / Q000276:immunology*; D007114:Immunization; D008325:Mammary Neoplasms, Experimental / Q000139:chemically induced / Q000473:pathology / Q000517:prevention & control*; D009929:Organ Size; D010053:Ovary / Q000473:pathology; D011374:Progesterone / Q000097:blood; D051381:Rats; D011919:Rats, Inbred Strains; D012710:Serum Albumin, Bovine / Q000276:immunology*; D014599:Uterus / Q000473:pathology
chemical_list: C056519:bovine serum albumin-LHRH conjugate; D012710:Serum Albumin, Bovine; D007987:Gonadotropin-Releasing Hormone; D011374:Progesterone; D004958:Estradiol; D015127:9,10-Dimethyl-1,2-benzanthracene