Glyco‐tuftsin derivatives modulate interleukin‐1 and tumor necrosis factor production

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Abstract
Six Thr1 (O‐glyco)‐derivatives of the “phagocytosis stimulating peptide” tuftsin, H‐Thr‐Lys‐Pro‐Arg‐OH and the N‐glycosylated undecapeptide H‐Thr‐Lys‐Pro‐Arg‐Glu‐Gln‐Gln‐Tyr‐Asn(β‐d‐GlcNAc)‐Ser‐Thr‐OH, which correspond to the “tuftsin‐region” at the Fc‐domain of immunoglobulin G (amino acid residues 289–299), were evaluated in comparison with tuftsin and rigin, H‐Gly‐Gln‐Pro‐Arg‐OH, for their capacity to evoke the release of interleukin‐1 and tumor necrosis factor from mouse peritoneal macrophages and from human monocytes. Several glycosylated tuftsin derivatives were found to modulate, in a rather dose‐dependent manner, the release of the two cytokines from both cell types.

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