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Effects of the CCKB antagonist L-365, 260 on benzodiazepine withdrawal-induced hypophagia in rats

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Abstract

The effect of the selective CCKB antagonist L-365, 260 on chlordiazepoxide (CDP) withdrawal-induced hypophagia was assessed in two related studies in rats pretreated for 21 days with CDP at doses escalated from 10 to 30 mg/kg per day (b.i.d.). L-365, 260 was studied at doses from 0.001 to 10 mg/kg (b.i.d.). There was no evidence that L-365, 260 at any dose alleviated CDP withdrawal-induced hypophagia. These data contrast with reports that CCKB antagonists alleviate behavioural benzodiazepine (BZ) withdrawal symptoms considered to be indicative of “anxiogenesis”. Presumably, such positive effects of CCKB antagonists are due to “functional antagonism”, with enhanced anxiety during BZ withdrawal being attenuated by anxiolytic actions of CCKB antagonists. Collectively, studies with CCKB antagonists and other agents involving a number of different BZ withdrawal signs suggest that BZ withdrawal is a heterogeneous syndrome, with various different underlying mechanisms. CCKB antagonists appear to alleviate only a subset of possible BZ withdrawal signs.

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  1. Department of Psychology, Liverpool University, PO Box 147, L69 3BX, Liverpool, UK

    A. J. Goudie & M. J. Leathley

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  1. A. J. Goudie
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  2. M. J. Leathley
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Goudie, A.J., Leathley, M.J. Effects of the CCKB antagonist L-365, 260 on benzodiazepine withdrawal-induced hypophagia in rats. Psychopharmacology 118, 57–64 (1995). https://doi.org/10.1007/BF02245250

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  • DOI: https://doi.org/10.1007/BF02245250

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