Exp Mol Med.  1997 Jun;29(2):129-132.

Species specificity of a novel factor which augments the expression of MHC class I antigens on tumor cell lines

• Puri N
• Raval A
• Saxena RK

Abstract

A novel factor which augments the expression of major histocompatibility complex I (MHC augmenting factor or MHC-AF) antigens on tumor cell lines, has been isolated from the culture supernatants of human peripheral blood mononuclear cells activated by concanavalin-A. A mouse equivalent of this factor has also been isolated from the culture supernatants of mouse spleen cells activated by mitogens or in a mixed lymphocyte reaction. Mouse MHC-AF enhances the expression of class I MHC antigens on murine tumor cell lines (EL-4 and BW5147) but not on human tumor cell lines (K562 and HR-7). Human MHC-AF on the other hand enhances the MHC I expression on both human as well as murine cell lines. Interferon gamma (IFN-gamma), a cytokine also known to enhance the expression of MHC I antigens, acts in a highly species specific manner with mouse IFN-gamma augmenting the MHC I on murine tumor cell lines and human IFN-gamma augmenting the MHC I on human tumor cell lines only. These results indicate important differences in the cross species biological activities of MHC-AF and IFN-gamma, and provide additional evidence for MHC-AF being distinct from IFN-gamma.

Keyword

major histocompatibility complex; lymphokines; lymphocytes; interferon gamma

MeSH Terms

Animals
Cell Line
Cell Line, Tumor*
Hand
Histocompatibility Antigens Class I*
Humans
Interferons
Lymphocyte Culture Test, Mixed
Lymphocytes
Lymphokines
Major Histocompatibility Complex
Mice
Mitogens
Species Specificity*
Spleen
Histocompatibility Antigens Class I
Interferons
Lymphokines
Mitogens