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Research Article| Volume 27, ISSUE 9, P953-967, May 01, 1990

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Interactions of corticotropin-releasing factor with antidepressant and anxiolytic drugs: Behavioral studies with pigeons

  • L. Zhang
    Correspondence
    Address reprint requests to L. Zhang, M.D., Department of Psychiatry, Uniformed Services University of the Health Sciences, 4301 Jones Bridge Road, Bethesda, MD 20814-4799.
    Footnotes
    Affiliations
    From the Department of Psychiatry, Uniformed Services University of Health Sciences, Bethesda, MD, USA
    Search for articles by this author
  • J.E. Barrett
    Footnotes
    Affiliations
    From the Department of Psychiatry, Uniformed Services University of Health Sciences, Bethesda, MD, USA
    Search for articles by this author
  • Author Footnotes
    1 We thank Myra Zimmerman for help in manuscript preparation and Drs. Steven T. Ahlers and Suzanne Gleeson for comments on the manuscript.
DOI:https://doi.org/10.1016/0006-3223(90)90033-X
Interactions of corticotropin-releasing factor with antidepressant and anxiolytic drugs: Behavioral studies with pigeons
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      Abstract

      A number of studies have shown significant interactions between neuronal systems involved with corticotropin-releasing factor (CRF) and either the clinical manifestation of depression and anxiety of the effects of antidepressant or anxiolytic drugs. In the present study, effects of CRF were studied alone and in combination with imipramine and with the sedative-hypnotic/anxiolytic drugs pentobarbital and chlordiazepoxide. Interactions of CRF with the novel, atypical anxiolytic buspirone were also examined. Interactions were evaluated through the use of schedule-controlled responding, responding suppressed by punishment, and drug discrimination procedures using the conditioned key-pecking response of pigeons. Effects of CRF were significantly enhanced when given in combination with imipramine with low noneffective imipramine doses potentiating the rate-reducing effects of CRF. Similarly, in pigeons trained to discriminate imipramine from saline, noneffective doses of CRF shifted the imipramine dose-response curve more than twofold to the left. Low doses of imipramine that produced saline key responding, produced imipramine-key responding when coadministered with CRF. The CRF antagonist α-helical CRF9–41 did not alter the rate-decreasing effects of imipramine. Effects of CRF on schedule-controlled responding were, however, antagonized by the administration of chlordiazepoxide and pentobarbital but not by buspirone, suggesting that CRF interacts with the GABA/benzodiazepine receptor mechanism complex but not with those systems involved in mediating the effects of buspirone. These results suggest that CRF interacts in significant ways with specific neurotransmitter systems subserving depression and anxiety.
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      Article info

      Publication history

      Received in revised form: October 4, 1989
      Received: May 24, 1980

      Footnotes

      ☆Supported in part by PHS award DA-02873 and by USARMDC contract 86-PP6814.

      Identification

      DOI: https://doi.org/10.1016/0006-3223(90)90033-X

      Copyright

      © 1990 Published by Elsevier Inc.

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