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Related Concept Videos

Cell Specific Gene Expression01:58

Cell Specific Gene Expression

Multicellular organisms contain a variety of structurally and functionally distinct cell types, but the DNA in all the cells originated from the same parent cells. The differences in the cells can be attributed to the differential gene expression. Liver cells, whose functions include detoxification of blood, production of bile to metabolize fats, and synthesis of proteins essential for metabolism, must express a specific set of genes to perform their functions. Gene expression also varies with...

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ENT1 regulates ethanol-sensitive EAAT2 expression and function in astrocytes.

Jinhua Wu1, Moonnoh R Lee, Sun Choi

  • 1Department of Molecular Pharmacology and Experimental Therapeutics, Mayo Clinic College of Medicine, Rochester, Minnesota 55905, USA.

Alcoholism, Clinical and Experimental Research
|April 9, 2010
PubMed
Summary
This summary is machine-generated.

Equilibrative nucleoside transporter 1 (ENT1) regulates excitatory amino acid transporter 2 (EAAT2) expression and function in astrocytes. This interaction influences glutamate uptake and may play a role in ethanol

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Area of Science:

  • Neuroscience
  • Astrocytes biology
  • Neuropharmacology

Background:

  • Astrocytes express equilibrative nucleoside transporter 1 (ENT1) and excitatory amino acid transporter 2 (EAAT2), regulating synaptic adenosine and glutamate.
  • ENT1 deficiency in mice correlates with elevated ventral striatal glutamate levels.

Purpose of the Study:

  • To investigate the regulatory role of ENT1 in EAAT2 expression and function within astrocytes.
  • To explore the potential contribution of ENT1-EAAT2 interaction to striatal glutamate dysregulation.

Main Methods:

  • Quantitative real-time PCR to assess EAAT2 mRNA expression.
  • Glutamate uptake assays in cultured astrocytes.
  • Investigated effects of ENT1 inhibition, overexpression, and knockdown (siRNA).
  • Examined ethanol's impact on EAAT2 expression and glutamate uptake.

Main Results:

  • ENT1 inhibition and knockdown reduced EAAT2 expression and glutamate uptake.
  • ENT1 overexpression increased EAAT2 mRNA levels.
  • Ethanol exposure (100-200 mM) elevated EAAT2 mRNA and glutamate uptake.
  • ENT1 knockdown attenuated ethanol-induced EAAT2 upregulation.

Conclusions:

  • ENT1 modulates astrocyte glutamate uptake by altering EAAT2 expression and function.
  • This ENT1-mediated regulation of EAAT2 may be involved in ethanol intoxication and preference.