Abstract：
:We have examined factors that alter the effect of diazepam (DZ) on plasma corticosterone (CS) in rats. DZ had a biphasic effect on plasma CS levels: CS decreased with doses below 5 mg/kg and increased with higher doses. Peak response occurred 90 minutes post injection in both sexes. Plasma DZ levels were significantly higher in females than in males and peak at 10 and 30 minutes post injection in males and females, respectively. There was also a sex difference in the pattern of DZ metabolites. An acute stressor (30 minutes of immobilization) did not affect plasma CS levels in rats injected with a 5 mg/kg dose of DZ. Prenatally stressed animals did not differ in basal CS levels or in their response to 5 mg/kg of DZ compared to prenatally non-stressed animals. These two groups of animals also did not differ in plasma levels of DZ or of its metabolites. By contrast, the 5 mg/kg dose of DZ had no effect on plasma testosterone levels in control animals, but increased it in prenatally stressed animals. Furthermore, compared to non-stressed controls, prenatally stressed animals had lower baseline plasma testosterone levels. These results indicate that the effect of DZ on plasma CS is influenced by endogenous as well as exogenous factors and that these effects vary with the particular biochemical parameter under examination.
journal_name
Life Scijournal_title
Life sciencesauthors
Pohorecky LA,Cotler S,Carbone JJ,Roberts Pdoi
10.1016/0024-3205(88)90367-0subject
Has Abstractpub_date
1988-01-01 00:00:00pages
2159-67issue
25eissn
0024-3205issn
1879-0631pii
0024-3205(88)90367-0journal_volume
43pub_type
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