Literature DB >> 3709658

Chronic corticosterone administration in rats: behavioral and biochemical evidence of increased central dopaminergic activity.

O Wolkowitz, M Sutton, M Koulu, R Labarca, L Wilkinson, A Doran, R Hauger, D Pickar, J Crawley.   

Abstract

Chronic corticosteroid treatment in humans in frequently complicated by behavioral changes. The present study suggests that chronic steroid administration in rats has distinct neurochemical consequences which are behaviorally relevant. Ten male Sprague-Dawley rats received 7 daily injections of corticosterone, following which they exhibited increased caudate homovanillic acid as well as an attenuated decline in vertical and ambulatory movement (functional measures of dopamine activity) compared to placebo-treated rats. A subgroup of steroid-treated rats which was more behaviorally responsive to corticosterone also showed increased caudate 5-hydroxyindole acetic acid and decreased prefrontal cortex dopamine and serotonin. These results are discussed in relation to the known behavioral side effects of chronic corticosteroid administration in man and the psychiatric manifestations of naturally occurring states of hypercortisolemia.

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Year:  1986        PMID： 3709658     DOI： 10.1016/0014-2999(86)90413-9

Source DB:  PubMed          Journal:  Eur J Pharmacol        ISSN： 0014-2999            Impact factor:   4.432


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