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The Role of Peripheral Benzodiazepine Receptors (PBRs) in CNS Pathophysiology

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The peripheral benzodiazepine receptors (PBRs) have been identified to bind selectively benzodiazepine ligands and an isoquinoline carboxamide derivative PK 11195 with high affinity. PBRs are present in the central nervous system (CNS), peripheral tissues, and most organs in the human body. PBRs are different from the central benzodiazepine receptors (CBRs) related to the nerve cell membrane GABAA receptor and are thought to play several physiological and pathophysiological functions in the CNS and immune system due to their meanly localization in glial cells, the mitochondrial outer membrane of peripheral cells and blood leucocytes and to their important roles in steroidogenesis, cell proliferation and differentiation. Recent research has shown that the density of PBRs is significanly increased in CNS several disorders, such as epilepsy, multiple sclerosis, cerebral ischemia, astrocytoma, brain injury and neurodegenerative diseases.Recent progress in the pharmacology of PBRs is reviewed here with respect to the functions in the brain and peripheral tissues including apoptosis, immune system modulation, seizure promotion, reactions of anticonvulsants on peripheral blood cells, and adverse drug reactions (ADR) of anticonvulsants.
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Keywords: benzodiazepine receptor; isoquinoline carboxamide; pbrs; pk11195

Document Type: Review Article

Publication date: August 1, 2002

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  • Current Medicinal Chemistry covers all the latest and outstanding developments in medicinal chemistry and rational drug design. Each issue contains a series of timely in-depth reviews written by leaders in the field covering a range of the current topics in medicinal chemistry. Current Medicinal Chemistry is an essential journal for every medicinal chemist who wishes to be kept informed and up-to-date with the latest and most important developments.
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