Journal
HUMAN PSYCHOPHARMACOLOGY-CLINICAL AND EXPERIMENTAL
Volume 16, Issue 1, Pages 65-69Publisher
JOHN WILEY & SONS LTD
DOI: 10.1002/hup.185
Keywords
imidazolines; receptors; platelet; depression; agmatine; bupropion
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Imidazoline receptors (IR), a novel family of non-adrenergic receptors, are present in brain, especially the limbic system, and platelets among other organs. Their functions include central mediation of blood pressure control and possibly modulation of affective symptomatology. Studies of unipolar depressed patients have revealed consistent up-regulation of the I-l subtype on the platelet. Treatment with cyclic antidepressants is accompanied by downregulation in responders. Treatment with the non-cyclic bupropion produced similar findings. Studies of human postmortem brain show changes in depressed subjects but the protein fragments assessed are of different molecular weights than in the platelet. Plasma agmatine is believed to be a putative endogenous ligand for I receptors. Thus, IR may be useful state markers of affective disorders. Copyright (C) 2001 John Wiley & Sons, Ltd.
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