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Decrease in Pyrogenicity of Muramyl Dipeptide After Coupling With Luteinizing Hormone‐Releasing Hormone
Author(s) -
Riveau Gilles,
Hosmalin Anne,
Carelli Claude,
Lefrancier Pierre,
Chedid Louis
Publication year - 1988
Publication title -
journal of leukocyte biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.819
H-Index - 191
eISSN - 1938-3673
pISSN - 0741-5400
DOI - 10.1002/jlb.44.5.448
Subject(s) - muramyl dipeptide , in vivo , dipeptide , in vitro , luteinizing hormone , pharmacology , adjuvant , glycopeptide , biology , chemistry , medicine , endocrinology , hormone , peptide , biochemistry , immunology , antibiotics , microbiology and biotechnology
Muramyl dipeptide (MDP) and its adjuvant active derivative lysine‐MDP (Lys‐MDP) have been demonstrated to be pyrogenic and to induce endogenous pyrogen (EP) production in vivo and in vitro. It has recently been shown that immunologic castration can be achieved in mice by immunization with luteinizing hormone‐releasing hormone (LHRH) directly conjugated by carbodilmide to Lys‐MDP, termed LHRH‐Lys‐MDP (cdi), or with a linear monomeric MDP‐linked molecule obtained by total synthesis, termed LHRH‐Lys‐MDP (s). These preparations were tested in the rabbit for their capacity to induce fever and were found to be devoid of pyrogenicity at dosage levels of Lys‐MDP that induced fever. This decrease of pyrogenicity of Lys‐MDP after coupling to LHRH seems to be related to the structure of the conjugate because the derivative LHRH‐LysNH 2 ‐MDP exhibited the same pyrogenic activity as the free glycopeptide. Surprisingly, nonpyrogenic LHRH‐Lys‐MDP induced production of EP and interleukin‐1 (IL‐1) in vitro and increased in vivo modifications of metal levels attributed to the action of IL‐1. Moreover, LHRH‐Lys‐MDP reduced the pyrogenic effect of an exogenous dose of EP.