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Biol Psychiatry. 2007 Jan 1;61(1):78-86. Epub 2006 Jul 28.

Corticotropin-releasing factor 1 antagonists selectively reduce ethanol self-administration in ethanol-dependent rats.

Author information

  • 1Molecular and Integrative Neurosciences Department, The Scripps Research Institute, La Jolla, California 92037, USA. creiter@scripps.edu

Abstract

BACKGROUND:

Alcohol dependence is characterized by excessive alcohol consumption, loss of control over intake, and the presence of a withdrawal syndrome, which includes both motivational and physical symptoms. Similar to human alcoholics, ethanol-dependent animals display enhanced anxiety-like behaviors and enhanced ethanol self-administration during withdrawal, effects hypothesized to result from a dysregulation of corticotropin-releasing factor (CRF) stress systems. Here, we used an animal model of ethanol dependence to test the effects of CRF(1) receptor antagonists on excessive ethanol self-administration in dependent rats.

METHODS:

Wistar rats, trained to orally self-administer ethanol, were exposed intermittently to ethanol vapors to induce ethanol dependence. Nondependent animals were exposed to control air. Following a 2-hour period of withdrawal, dependent and nondependent animals were systemically administered antalarmin, MJL-1-109-2, or R121919 (CRF(1) antagonists) and ethanol self-administration was measured.

RESULTS:

The nonpeptide, small molecule CRF(1) antagonists selectively reduced excessive self-administration of ethanol in dependent animals during acute withdrawal. The antagonists had no effect on ethanol self-administration in nondependent rats.

CONCLUSIONS:

These data demonstrate that CRF(1) receptors play an important role in mediating excessive ethanol self-administration in dependent rats, with no effect in nondependent rats. CRF(1) antagonists may be exciting new pharmacotherapeutic targets for the treatment of alcoholism in humans.

PMID:
16876134
[PubMed - indexed for MEDLINE]
PMCID:
PMC2741496
Free PMC Article

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