alexa Suppression of experimental allergic encephalomyelitis in Lewis rats after elimination of macrophages.


Rheumatology: Current Research

Author(s): Huitinga I, van Rooijen N, de Groot CJ, Uitdehaag BM, Dijkstra CD

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Abstract Almost 50\% of the cells infiltrating the central nervous system (CNS) of animals with experimental allergic encephalomyelitis (EAE) are macrophages (M psi). To investigate the role of the M psi in the pathogenesis of EAE, we eliminated M psi by means of mannosylated liposomes containing dichloromethylene diphosphonate (Cl2MDP). Cl2MDP-containing liposomes injected intravenously eliminate M psi in spleen and liver. Incorporation of mannose into the lipid layers enables the liposomes to pass the blood-brain barrier (BBB). Injections of Cl2MDP-containing mannose liposomes intravenously shortly before the appearance of clinical signs, markedly suppressed the expression of clinical signs of EAE. This suppression was accompanied by a marked reduction of infiltrated M psi in the CNS. Cl2MDP-containing liposomes without mannose incorporated had no effect. Cl2MDP-containing mannosylated liposomes had no effect on plasma corticosterone levels compared with injections of saline; thus, the suppression of expression of EAE was not corticosterone mediated. These results show that the M psi within the CNS play an important role in the pathogenesis of EAE.
This article was published in J Exp Med and referenced in Rheumatology: Current Research

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