Journal
NEUROCHEMICAL RESEARCH
Volume 29, Issue 5, Pages 903-922Publisher
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1023/B:NERE.0000021235.83952.9a
Keywords
development; myelination; nuclear T3 receptors; oligodendrocyte; thyroid hormone
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Thyroid hormone (T3) regulates brain development and function and in particular ensures normal myelination. Animal models and in vitro systems have been employed to demonstrate the effects of T3, which acts via nuclear hormone receptors. T3 receptors (TRs) are transcription factors that activate or suppress target gene expression, such as myelin basic protein (MBP), in a hormone-dependent or - independent fashion. Two distinct genes, TRalpha and TRbeta, encode several receptor isoforms with specific functions. This overview summarizes current knowledge on the cellular expression and the role of these isoforms and also examines the action of T3 on oligodendrocyte lineage cell types at defined developmental stages. Re-expression of TRs and also that of other transcription factors in oligodendrocytes may constitute some of the metabolic changes required for succesful remyelination in the adult central nervous system after demyelinating lesions.
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