@article{KleinGrohWeishauptetal.2015, author = {Klein, Dennis and Groh, Janos and Weishaupt, Andreas and Martini, Rudolf}, title = {Endogenous antibodies contribute to macrophage-mediated demyelination in a mouse model for CMT1B}, series = {Journal of Neuroinflammation}, volume = {12}, journal = {Journal of Neuroinflammation}, number = {49}, doi = {10.1186/s12974-015-0267-y}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-125036}, year = {2015}, abstract = {Background We could previously identify components of both the innate and the adaptive immune system as disease modifiers in the pathogenesis of models for Charcot-Marie-Tooth (CMT) neuropathies type 1B and 1X. As part of the adaptive immune system, here we investigated the role of antibodies in a model for CMT1B. Methods Antibodies were localized and characterized in peripheral nerves of the CMT1B model by immunohistochemistry and Western blot analysis. Experimental ablation of antibodies was performed by cross breeding the CMT1B models with mutants deficient in B-lymphocytes (JHD-/- mutants). Ameliorated demyelination by antibody deficiency was reverted by intravenous injection of mouse IgG fractions. Histopathological analysis was performed by immunocytochemistry and light and quantitative electron microscopy. Results We demonstrate that in peripheral nerves of a mouse model for CMT1B, endogenous antibodies strongly decorate endoneurial tubes of peripheral nerves. These antibodies comprise IgG and IgM subtypes and are preferentially, but not exclusively, associated with nerve fiber aspects nearby the nodes of Ranvier. In the absence of antibodies, the early demyelinating phenotype is substantially ameliorated. Reverting the neuropathy by reconstitution with murine IgG fractions identified accumulating antibodies as potentially pathogenic at this early stage of disease. Conclusions Our study demonstrates that in a mouse model for CMT1B, endogenous antibodies contribute to early macrophage-mediated demyelination and disease progression. Thus, both the innate and adaptive immune system are mutually interconnected in a genetic model for demyelination. Since in Wallerian degeneration antibodies have also been shown to be involved in myelin phagocytosis, our study supports our view that inherited demyelination and Wallerian degeneration share common mechanisms, which are detrimental when activated under nonlesion conditions.}, language = {en} } @article{MartiniWillison2016, author = {Martini, Rudolf and Willison, Hugh}, title = {Neuroinflammation in the peripheral nerve: cause, modulator, or bystander in peripheral neuropathies?}, series = {GLIA}, volume = {64}, journal = {GLIA}, number = {4}, doi = {10.1002/glia.22899}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-189696}, pages = {475-486}, year = {2016}, abstract = {The role of innate and adaptive inflammation as a primary driver or modifier of neuropathy in premorbidly normal nerves, and as a critical player in amplifying neuropathies of other known causes (e.g., genetic, metabolic) is incompletely understood and under-researched, despite unmet clinical need. Also, cellular and humoral components of the adaptive and innate immune system are substantial disease modifying agents in the context of neuropathies and, at least in some neuropathies, there is an identified tight interrelationship between both compartments of the immune system. Additionally, the quadruple relationship between Schwann cell, axon, macrophage, and endoneurial fibroblast, with their diverse membrane bound and soluble signalling systems, forms a distinct focus for investigation in nerve diseases with inflammation secondary to Schwann cell mutations and possibly others. Identification of key immunological effector pathways that amplify neuropathic features and associated clinical symptomatology including pain should lead to realistic and timely possibilities for translatable therapeutic interventions using existing immunomodulators, alongside the development of novel therapeutic targets.}, language = {en} }