Journal
MOLECULAR AND CELLULAR ENDOCRINOLOGY
Volume 199, Issue 1-2, Pages 49-60Publisher
ELSEVIER SCI IRELAND LTD
DOI: 10.1016/S0303-7207(02)00296-4
Keywords
thyroid hormone; development; rat brain; oligodendrocyte
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Funding
- NIDDK NIH HHS [R01-DK54060] Funding Source: Medline
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Thyroid hormone plays an important role in oligodendrocyte development. The studies presented here suggest that thyroid hormone is required for oligodendrocyte survival during development. Oligodendrocyte precursor cells, astrocytes and microglia were cultured in a defined media. Oligodendrocyte precursor cell differentiation was induced by growth factor removal. Time course studies revealed that oligodendrocytes cultured in the presence or absence of triiodothyronine (T3) develop similarly during the first 3 days of development. Oligodendrocytes cultured in the absence of T3, however, die after developmental day 3. TdT-Mediated dUDP Nick End Labeling assay and Hoechst staining indicate that T3 rescues developing oligodendrocytes from death by apoptosis. Apoptosis is likely induced by the presence of the cytokines TNFalpha and IL-1beta. However, expression of these cytokines is not altered by thyroid hormone administration. Thus, thyroid hormone has been demonstrated to effect proliferation, myelin gene expression and now the survival of developing oligodendrocytes. (C) 2002 Elsevier Science Ireland Ltd. All rights reserved.
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