Prenatal exposure to morphine in mice: enhanced responsiveness to morphine and stress

Pharmacology, Biochemistry, and Behavior
C Castellano, M Ammassari-Teule

Abstract

Some behavioral effects of prenatal morphine administration were studied in CD1 mice. Two sets of experiments were carried out. In a first set, which was performed during development: (a) measures of postnatal reflexes revealed only a light deficit in tests involving motor control, (b) activity measures showed a significant reduction of spontaneous activity which was evident only in the course of the first postnatal days. In a second set of experiments, in which adult mice were tested for activity, analgesia and passive avoidance learning: (a) no difference was observed, in baseline conditions, between the performances of the mice prenatally exposed to saline and those preexposed to morphine, (b) as compared with controls, enhanced responsiveness to morphine administration (for the activity and passive avoidance measures), and to morphine and stress (for the analgesic measures) were found.

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Citations

Mar 1, 1995·Pharmacology, Biochemistry, and Behavior·N A ShepanekC N Medici
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