Antigenic heterogeneity of skin tumors of nonmelanocyte origin: Analysis with monoclonal antibodies to tumor-associated antigens and to histocompatibility antigens

P. G. Natali, M. Viora, M. R. Nicotra, P. Giacomini, A. Bigotti, S. Ferrone

Research output: Contribution to journalArticle


Surgically removed benign and malignant human skin lesions of nonmelanocyte origin have been tested with monoclonal antibodies to Ia antigens, to the HLA-A,B antigenic molecular complex, and to melanoma-associated antigen(s). MAA include a high-molecular-weight (HMW) MAA, a 115,000-molecular-weight MAA, a 94,000-molecular-weight MAA, and a cytoplasmic MAA. Indirect immunofluorescence was used as the assay system because of the limited amount of tissue available. When the amount of tissue available was sufficient, double determinant immunoassays (DDIA) were used to quantitate the level of the HMW MAA and of the cytoplasmic MAA. The results of the DDIA were in agreement with those of indirect immunofluorescence in more than 75% of the cases. Malignant skin tumors of various histiotypes displayed three types of changes: 1) appearance of Ia antigens and cytoplasmic MAA, 2) increase in the level of the HMW MAA, of a 115,000- and a 100,000-molecular-weight MAA, and 3) reduction in the level of HLA-A,B antigens and β2-microglobulin. A significant heterogeneity was found in the antigenic profile among various lesions of a given histiotype as well as among tumor cells within a given lesion.

Original languageEnglish
Pages (from-to)439-447
Number of pages9
JournalJournal of the National Cancer Institute
Issue number3
Publication statusPublished - 1983


ASJC Scopus subject areas

  • Cancer Research
  • Oncology

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