Species specificity of a novel factor which augments the expression of MHC class I antigens on tumor cell lines
Experimental & Molecular Medicine
;
: 129-132, 1997.
Article
in English
| WPRIM
| ID: wpr-123618
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.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Species Specificity
/
Spleen
/
Lymphocytes
/
Histocompatibility Antigens Class I
/
Cell Line
/
Lymphokines
/
Interferons
/
Lymphocyte Culture Test, Mixed
/
Cell Line, Tumor
/
Hand
Limits:
Animals
/
Humans
Language:
English
Journal:
Experimental & Molecular Medicine
Year:
1997
Type:
Article
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