Abstract
Glia perform several energy-dependent functions that may aid neuronal survival under pathological conditions. Glycogen is the major energy reserve in brain, and it is localized almost exclusively to astrocytes. Using murine cortical cell cultures containing both glia and neurons, we examined the effect of altered glial glycogen stores on neuronal survival following glucose deprivation. As previously reported, cultures exposed for several hours to media lacking glucose developed widespread neuronal degeneration without glial degeneration. If glial astrocyte glycogen content was increased to 2–3 times control levels by a 24-h pretreatment with 1 μ M insulin or 0.5 m M methionine sulfoximine (MSO), glucose deprivation-induced neuronal degeneration was attenuated. These protective effects were blocked if glycogen levels were reduced back to control levels by a 30-min exposure to 1 m M dibutyryl cyclic AMP or 20 μ M norepinephrine prior to glucose deprivation. Astrocyte glycogen stores may be an important factor influencing neuronal survival under conditions of energy substrate limitation.
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Dates
Type | When |
---|---|
Created | 14 years, 4 months ago (April 8, 2011, 1:15 p.m.) |
Deposited | 5 months, 3 weeks ago (March 11, 2025, 5:27 a.m.) |
Indexed | 2 days, 12 hours ago (Sept. 3, 2025, 7:18 a.m.) |
Issued | 32 years, 8 months ago (Jan. 1, 1993) |
Published | 32 years, 8 months ago (Jan. 1, 1993) |
Published Online | 32 years, 8 months ago (Jan. 1, 1993) |
Published Print | 32 years, 8 months ago (Jan. 1, 1993) |
@article{Swanson_1993, title={Glial Glycogen Stores Affect Neuronal Survival during Glucose Deprivation in vitro}, volume={13}, ISSN={1559-7016}, url={http://dx.doi.org/10.1038/jcbfm.1993.19}, DOI={10.1038/jcbfm.1993.19}, number={1}, journal={Journal of Cerebral Blood Flow & Metabolism}, publisher={SAGE Publications}, author={Swanson, Raymond A. and Choi, Dennis W.}, year={1993}, month=jan, pages={162–169} }