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  • Title: Inhibition of endogenous pyrogen-induced fever by a muramyl dipeptide derivative.
    Author: Parant M, Riveau G, Parant F, Chedid L.
    Journal: Am J Physiol; 1984 Sep; 247(3 Pt 1):C169-74. PubMed ID: 6476105.
    Abstract:
    N-acetylmuramyl-L-alanyl-D-isoglutamine, or muramyl dipeptide (MDP), is a synthetic immunoadjuvant analogue of a bacterial peptidoglycan subunit that has a definite pyrogenic effect in the rabbit. Some adjuvant-active derivatives such as murabutide [MDP(Gln)-OnBu] or murametide [MDP(Gln)-OMe] are not pyrogenic. Murabutide did not stimulate human or rabbit cells to release endogenous pyrogen (EP), but murametide induced EP production at the same dosage levels as MDP. Moreover, plasma from rabbits treated with murametide transferred into untreated recipients elicited a febrile response typical of EP fever and comparable with that induced by plasma from MDP-treated animals. Murametide not only inhibited the central effect of EP that is generated but also the effect of an extra dose of EP administered later by the intravenous route. Moreover, pretreatment of rabbits with murametide decreased fever responses induced by certain high-molecular-weight exogenous pyrogens as mediated through the production of EP.
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