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Physico-chemical membrane alterations during ethanol intoxication.

F Beaugé1

  • 1INSERM U26, Hôpitál F. Widal, Paris, France.

Alcohol and Alcoholism (Oxford, Oxfordshire). Supplement
|January 1, 1991
PubMed
Summary

Ethanol alters synaptic membrane fluidity, reducing sensitivity in tolerant rats. These changes, observed in both neuronal and red blood cell membranes, may offer therapeutic targets for alcoholism.

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Area of Science:

  • Neuroscience
  • Biochemistry
  • Pharmacology

Background:

  • Chronic ethanol intoxication alters neuronal membrane physical properties.
  • Understanding these alterations is crucial for developing effective alcoholism treatments.

Purpose of the Study:

  • To investigate the physical state of synaptic membranes in rats with chronic ethanol intoxication.
  • To correlate changes in neuronal membranes with those in erythrocyte membranes and human alcoholic patients.

Main Methods:

  • Utilized fluorescence polarization of DPH and TMA-DPH to measure membrane fluidity and ethanol sensitivity.
  • Assessed ethanol partitioning and membrane surface glycans.
  • Examined erythrocyte membranes from both rats and alcoholic patients.

Main Results:

  • Ethanol tolerance was associated with reduced membrane sensitivity to ethanol and altered ethanol partitioning.
  • Dependence correlated with reduced basal fluidity in the apolar membrane region.
  • Similar alterations were observed in erythrocyte membranes, correlating with synaptic changes.

Conclusions:

  • Two distinct membrane alterations are associated with ethanol tolerance and dependence.
  • These neuronal and erythrocyte membrane changes may serve as biomarkers for alcoholism.
  • Modulating these membrane properties could offer therapeutic strategies for alcoholism.

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