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The Journal of Immunology, Vol 137, Issue 10 3201-3204, Copyright © 1986 by American Association of Immunologists

ARTICLES

A short synthetic peptide fragment of human interleukin 1 with immunostimulatory but not inflammatory activity

G Antoni, R Presentini, F Perin, A Tagliabue, P Ghiara, S Censini, G Volpini, L Villa and D Boraschi

Short peptide fragments of human and murine interleukin 1 (IL 1) were synthesized on the basis of their predicted exposure on the surface of the molecule in an attempt to identify the minimal structure responsible for the immunostimulatory activity of IL 1. One of these peptides, a fragment of nine residues of human IL 1 beta (VQGEESNDK, fragment 163-171), showed high T cell activation capacity, as judged by its ability to stimulate murine thymocyte proliferation and to potently induce interleukin 2 production in spleen cells. On the other hand, the 163-171 peptide was devoid of prostaglandin-inducing capacity in vitro and pyrogenic activity in vivo, two inflammatory features peculiar to the entire hu IL 1 beta molecule. Thus we propose that this peptide may represent one of the portions of hu IL 1 beta responsible for its immunostimulatory capacity.


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