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Embryonic cerebral cortical progenitors are resistant to apoptosis, but increase expression of suicide receptor DISC-complex genes and suppress autophagy following ethanol exposure.

Embryonic cerebral cortical progenitors are resistant to apoptosis, but increase expression of suicide receptor DISC-complex genes and suppress autophagy following ethanol exposure. Research Abstract Details 

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  • Embryonic cerebral cortical progenitors are resistant to apoptosis, but increase expression of suicide receptor DISC-complex genes and suppress autophagy following ethanol exposure. Abstract Text:

    terasa l prockTerasa L Prock,rajesh c mirandaRajesh C Miranda,

    BACKGROUND: In utero exposure to ethanol can result in severe fetal brain defects. Previous studies showed that ethanol induces apoptosis in differentiated cortical neurons. However, we know little about ethanol's effects on proliferating embryonic cortical progenitors. This study investigated the impact of ethanol exposure on the Fas/Apo-1/CD95 suicide receptor pathway, and on the survival of proliferating cortical neuroepithelial progenitors. METHODS: Murine embryonic-derived primary cortical neuroepithelial cells were maintained as neurosphere cultures and exposed to a dose range of ethanol for periods ranging from 1 to 5 days. Programmed cell death was measured by 4 independent means (Annexin-V staining, caspase activation, DNA fragmentation, and autophagic vacuole formation). Surface Fas/Apo-1 suicide receptor expression was measured by flow cytometry. Expression of Fas/Apo-1-associated DISC-complex genes was measured by quantitative polymerase chain reaction. RESULTS: Ethanol exposure did not substantially increase apoptosis, necrosis, or surface Fas/Apo-1 expression. Moreover, ethanol significantly decreased caspase activation and autophagic activity. Finally, ethanol exposure induced mRNA expression of genes that constitute the death receptor complex. CONCLUSIONS: This study provides surprising evidence that ethanol does not induce either programmed cell death or necrosis of immature progenitors during neurogenesis, although ethanol may render neural progenitors susceptible to future apoptotic insults. Furthermore, our novel observation that ethanol suppresses autophagy is consistent with a hypothesis that ethanol promotes premature neural progenitor maturation. Taken together with our previous data regarding the role of the Fas/Apo-1 receptor in neural development, we conclude that ethanol disrupts basic proliferation and differentiation machinery rather than initiating cell death per se.

    Embryonic cerebral cortical progenitors are resistant to apoptosis, but increase expression of suicide receptor DISC-complex genes and suppress autophagy following ethanol exposure. Publishing Authors By Initials

    tl prockTL Prock,rc mirandaRC Miranda,

    For similar cells: stem cells research abstracts see: cells: stem cells research

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    Embryonic cerebral cortical progenitors are resistant to apoptosis, but increase expression of suicide receptor DISC-complex genes and suppress autophagy following ethanol exposure. Journal Published:

    PUBLICATION TYPE: Research Support, N.I.H., Extr

    Journal: Alcoholism, clinical and experimental research

    VOLUME: 31

    Page Numbers: 694-703

    Journal Abbreviation: Alcohol. Clin. Exp. Res.

    ISSN: 0145-6008

    DAY: 3

    MONTH: Apr

    YEAR: 2007

    Embryonic cerebral cortical progenitors are resistant to apoptosis, but increase expression of suicide receptor DISC-complex genes and suppress autophagy following ethanol exposure. Information

    Number of References:

    LANGUAGE: eng

    NlmUniqueID: 7707242

    Embryonic cerebral cortical progenitors are resistant to apoptosis, but increase expression of suicide receptor DISC-complex genes and suppress autophagy following ethanol exposure. Keywords Mesh Terms:

    KEYWORDS: Stem Cells

    MESH TERMS: drug effects

    Chemical & Substance for Abstract: Embryonic cerebral cortical progenitors are resistant to apoptosis, but increase expression of suicide receptor DISC-complex genes and suppress autophagy following ethanol exposure. Information

    Substance Name: Caspases

    Registry Number: EC 3.4.22.-

    Grant and Affiliation Information for Embryonic cerebral cortical progenitors are resistant to apoptosis, but increase expression of suicide receptor DISC-complex genes and suppress autophagy following ethanol exposure.

    AFFILIATION: Department of Neuroscience and Experimental Therapeutics, Texas A&M University, Health Science Center College of Medicine, College Station, Texas 77843, USA.

    Country: England

    England Research Publication

    AGENCY: United States NIAAA

    GRANT: AA13440

    ACRONYM: AA

    MEDLINETA: Alcohol Clin Exp Res

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