Abstract

This chapter reviews knowledge on immunology of experimental hepatic tumours induced by chemical carcinogens, particularly with regard to the nature and characteristics of tumour-associated antigens. It is clear that hepatic tumours express antigens which are not detectable in normal tissues of the adult. These may differ in type, qualitatively or quantitatively, with the particular tumour model employed, although it is noteworthy that tumour-associated embryonic antigens are the most consistently expressed. No correlation has emerged between the occurrence of these antigens and the tumour rejection and cell surface antigens. However, as indicated in Section 9.5, individually distinct neoantigens have been demonstrated on cells transformed in vitro, suggesting the possibility that similar assays of neoantigen profiles upon normal cells treated with chemical carcinogens may provide relatively rapid screening assays for the detection of neoplastic transformation.

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