Premium
Tumour‐related antigen specificities associated with 3‐methylcholanthrene‐treated rat embryo cells
Author(s) -
Embleton M. J.,
Baldwin R. W.
Publication year - 1979
Publication title -
international journal of cancer
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.475
H-Index - 234
eISSN - 1097-0215
pISSN - 0020-7136
DOI - 10.1002/ijc.2910230616
Subject(s) - antiserum , methylcholanthrene , antigen , immunofluorescence , antibody , population , biology , in vitro , embryo , microbiology and biotechnology , carcinogen , cell , immunology , chemistry , medicine , biochemistry , environmental health
Rat embryo cells were treated in vitro for 18 h with 10 üg/ml 3‐methylcholanthrene (MCA). Syngeneic male rats were immunized with several inocula of treated cells to prepare antisera which were screened for membrane immunofluorescence reactivity against panels of established chemically‐induced syngeneic rat tumours. Three separate anti‐serum pools raised against MCA‐treated cells reacted with certain chemically‐induced tumours, whereas antisera to control (DMSO‐treated) cells were completely negative. The reactions observed were reproducible and highly specific for particular target tumours. Absorption studies indicated that each antiserum contained antibodies to several different antigens, present on different tumours. Antiserum prepared against extranuclear membrane from MCA‐treated cells, rather than intact MCA‐treated cells, was negative. This suggests that the antibody responses were directed against antigens arising subsequently to MCA treatment and injection into syngeneic hosts. It is postulated that carcinogen treatment results in the acquisition of multiple neoantigens among a treated cell population, which represent an early change in a sequence of events leading to malignant transformation.