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p75 NTR independent oligodendrocyte death in cuprizone‐induced demyelination in C57BL/6 mice
Author(s) -
Copray J. C. V. M.,
Küst B. M.,
MantinghOtter I.,
Boddeke H. W. G. M.
Publication year - 2005
Publication title -
neuropathology and applied neurobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.538
H-Index - 95
eISSN - 1365-2990
pISSN - 0305-1846
DOI - 10.1111/j.1365-2990.2005.00656.x
Subject(s) - oligodendrocyte , biology , myelin , corpus callosum , apoptosis , remyelination , receptor , multiple sclerosis , microbiology and biotechnology , immunology , pathology , neuroscience , central nervous system , medicine , genetics
Feeding C57Bl/6 J mice the copper chelator cuprizone leads to selective apoptosis of mature oligodendrocytes and concomitant demyelination predominantly in the corpus callosum. The process of oligodendrocyte apoptosis in this animal model for multiple sclerosis (MS) involves early microglial activation, but no infiltration of T‐lymphocytes. Therefore, this model could mimic early stages of oligodendrocyte degeneration Affected oligodendrocytes express the common neurotrophin receptor, p75 NTR , a ‘stress‐receptor’ which under certain circumstances can induce apoptosis. Only affected oligodendrocytes in MS lesions and MS animal models express this receptor. In order to study the significance of p75 NTR in the fate of oligodendrocytes, we have exposed wild‐type as well as p75 NTR ‐knockout mice to a 0.2% (w/w) cuprizone diet and performed a comparative immunohistochemical analysis of the corpus callosum at various time points. Surprisingly, our results show that the absence of p75 NTR did not alter cuprizone‐induced oligodendrocyte death (and subsequent de‐ or remyelination). Apparently, intracellular apoptosis pathways in adult oligodendrocytes do not require p75 NTR activated signal transduction in the absence of T‐lymphocytes and T‐lymphocyte derived cytokines .