Purification, characterization and anti-tumor activity of a new cytokine, histiocyte-secreted-factor (HSF)

International Journal of Cancer. Journal International Du Cancer
N SatomiK Haranaka

Abstract

Purification of cytokines was carried out while monitoring their in vivo anti-tumor activity and in vitro cytotoxic activities. As a result, purified new cytokines were obtained from culture supernatant of a histiocytic cell line from rabbit serum. Briefly, a new cytokine (HSF, histiocyte-secreted-factor) was purified from the culture of supernatant of the histiocytic cell line (TYH) which we established from the peripheral blood of a malignant-lymphoma patient. The purified samples exhibited suppressive effects on tumor growth but no necrotizing activity towards transplanted murine tumors. The substance displayed no cytotoxic activity against L cells (mouse fibroblast cells). The molecular weight of human HSF was about 42 kDa as estimated by SDS-PAGE. Amino-acid sequencing of the purified HSFD from the culture supernatant was performed, but the N-terminal was blocked. Next, a new cytokine was purified from rabbit serum stimulated with Propionibacterium acnes and elicited with lipopolysaccharide. The rabbit HSF was isolated by the same procedures as those used for the human HSF purification steps. Amino-acid sequencing was carried out after enzyme digestion. Three parts of the amino-acid sequence of the rabbit HSF were determin...Continue Reading

References

Jan 1, 1987·Virchows Archiv. B, Cell Pathology Including Molecular Pathology·T KawaiM Suzuki
Nov 1, 1988·The Journal of Experimental Medicine·S S SungS M Fu
Jun 1, 1986·Proceedings of the National Academy of Sciences of the United States of America·K HaranakaL J Old
Oct 1, 1984·British Journal of Cancer·K HaranakaA Sakurai
Aug 15, 1984·International Journal of Cancer. Journal International Du Cancer·K HaranakaA Sakurai

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