3H-imipramine and3H-cyano-imipramine binding in rat brain tissue: Effect of long-term antidepressant administration

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Abstract
3H-imipramine and3H-cyano-imipramine binding was determined in brain homogenates of rats which had been treated for 21 days with imipramine or desimipramine. When compared to control animals, long-term administration of these antidepressants did not induce any alteration in the maximal number of3H-imipramine or3H-cyano-imipramine binding sites. However, a transient increase in the apparent dissociation constant was observed. Such findings are discussed in respect to previous studies, which have been highly contraversial.