Seven Day variable-stress regime alters cortical beta adrenoceptor binding and immunologic responses: Reversal by imipramine.

BASSO, A.M.; DEPANTE-DEPAOLI, M.; CANCELA, L.M.; MOLINA VICTOR ALEJANDRO

PERGAMON-ELSEVIER SCIENCE LTD

Año: 1993 vol. 45 p. 665 - 665

p class="marginB3" align="justify">Rats were submitted daily to a variable stressor for 1 week with or without concurrent imipramine (IMI) administration. One day after the last injection or stressful event, binding of cortical â-adrenoceptors was determined in all experimental groups. Another group of chronically stressed animals with or without concurrent IMI administration were sacrificed 24 h following the last stress or injection treatment, and several immunologic parameters were evaluated. Chronically stressed rats showed an enhanced number of cortical â-adrenergic sites without changes in their affinity. This effect was not present following concurrent administration with the antidepressant. In addition, a decreased percentage of T lymphocytes and a reduced delayed-type hypersensitivity reaction was also observed in stressed animals. Both responses were no longer evident when stressed rats were previously administered IMI. A possible link between behavioral, neurochemical, and