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The FASEB Journal, Vol 6, 2311-2322, Copyright © 1992 by The Federation of American Societies for Experimental Biology
REVIEWS |
SM Paul and RH Purdy
Section on Molecular Pharmacology, National Institute of Mental Health, Bethesda, Maryland 20892.
Neuroactive steroids are natural or synthetic steroids that rapidly alter the excitability of neurons by binding to membrane-bound receptors such as those for inhibitory and (or) excitatory neurotransmitters. The best-studied neuroactive steroids are a series of sedative-hypnotic 3 alpha-hydroxy ring A-reduced pregnane steroids that include the major metabolites of progesterone and deoxycorticosterone, 3 alpha-hydroxy-5 alpha-pregnan-20-one (allopregnanolone) and 3 alpha,21-dihydroxy-5 alpha-pregnan-20-one (allotetrahydroDOC), respectively. These 3 alpha-hydroxysteroids do not interact with classical intracellular steroid receptors but bind stereoselectively and with high affinity to receptors for the major inhibitory neurotransmitter in brain, gamma-amino-butyric acid (GABA). Biochemical and electrophysiological studies have shown that these steroids markedly augment GABA-activated chloride ion currents in a manner similar (but not identical) to that of anesthetic barbiturates. Several steroids have also been observed to have convulsant or proconvulsant properties, including the synthetic amidine 3 alpha- hydroxy-16-imino-5 beta-17-azaandrostan-11-one (RU5135) and the natural sulfate esters of pregnenolone and dehydroepiandrosterone. Several of these have been shown to be bicuculline or picrotoxin-like GABAA receptor antagonists. Examples of steroids that alter neuronal excitability rapidly by augmenting or inhibiting excitatory amino acid receptor-mediated responses have also been reported. Recently, allopregnanolone and allotetrahydroDOC have also been measured in brain and plasma where their levels have been shown to fluctuate in response to stress and during the estrous and menstrual cycles of rats and humans, respectively. Although the major fraction of allopregnanolone in tissue, including brain, is of adrenal and/or ovarian origin, appreciable levels of allopregnanolone can still be measured in the brains of adrenalectomized and/or oophorectomized animals. Receptor- active neurosteroids may represent an important class of neuromodulators that can rapidly alter central nervous system excitability via novel nongenomic mechanisms.
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C. A. Bowen, R. H. Purdy, and K. A. Grant Ethanol-Like Discriminative Stimulus Effects of Endogenous Neuroactive Steroids: Effect of Ethanol Training Dose and Dosing Procedure J. Pharmacol. Exp. Ther., April 1, 1999; 289(1): 405 - 411. [Abstract] [Full Text] |
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S. L. Hansen, B. Fjalland, and M. B. Jackson Differential Blockade of gamma -Aminobutyric Acid Type A Receptors by the Neuroactive Steroid Dehydroepiandrosterone Sulfate in Posterior and Intermediate Pituitary Mol. Pharmacol., March 1, 1999; 55(3): 489 - 496. [Abstract] [Full Text] |
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E. R Lumbers and Z.-Y. Yu A method for determining baroreflex-mediated sympathetic and parasympathetic control of the heart in pregnant and non-pregnant sheep J. Physiol., March 1, 1999; 515(2): 555 - 566. [Abstract] [Full Text] [PDF] |
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K. Ukena, C. Kohchi, and K. Tsutsui Expression and Activity of 3{beta}-Hydroxysteroid Dehydrogenase/{Delta}5-{Delta}4-Isomerase in the Rat Purkinje Neuron during Neonatal Life Endocrinology, February 1, 1999; 140(2): 805 - 813. [Abstract] [Full Text] |
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T. G. Kokate, M. K. Banks, T. Magee, S.-I. Yamaguchi, and M. A. Rogawski Finasteride, a 5alpha -Reductase Inhibitor, Blocks the Anticonvulsant Activity of Progesterone in Mice J. Pharmacol. Exp. Ther., February 1, 1999; 288(2): 679 - 684. [Abstract] [Full Text] |
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M. Freeman, A Dobritsa, P Gaines, W. Segraves, and J. Carlson The dare gene: steroid hormone production, olfactory behavior, and neural degeneration in Drosophila Development, January 10, 1999; 126(20): 4591 - 4602. [Abstract] [PDF] |
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K. Sabey, K. Paradiso, J. Zhang, and J. H. Steinbach Ligand Binding and Activation of Rat Nicotinic alpha 4beta 2 Receptors Stably Expressed in HEK293 Cells Mol. Pharmacol., January 1, 1999; 55(1): 58 - 66. [Abstract] [Full Text] |
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Y. Deng and S. Kaufman Pregnancy-induced changes in central response to atrial distension mimicked by progesterone metabolite Am J Physiol Regulatory Integrative Comp Physiol, December 1, 1998; 275(6): R1875 - R1877. [Abstract] [Full Text] [PDF] |
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T. G. Kokate, S.-I. Yamaguchi, L. K. Pannell, U. Rajamani, D. M. Carroll, A. B. Grossman, and M. A. Rogawski Lack of Anticonvulsant Tolerance to the Neuroactive Steroid Pregnanolone in Mice J. Pharmacol. Exp. Ther., November 1, 1998; 287(2): 553 - 558. [Abstract] [Full Text] |
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M. J. Millan, A. Newman-Tancredi, M. Brocco, A. Gobert, F. Lejeune, V. Audinot, J.-M. Rivet, R. Schreiber, A. Dekeyne, M. Spedding, et al. S 18126 ({2-[4-(2,3-dihydrobenzo[1,4]dioxin-6-yl)piperazin-1-yl methyl]indan-2-yl}), a Potent, Selective and Competitive Antagonist at Dopamine D4 Receptors: An In Vitro and In Vivo Comparison with L 745,870 (3-(4-[4-chlorophenyl]piperazin-1-yl)methyl-1H-pyrrolo[2,3b]pyridine) and Raclopride J. Pharmacol. Exp. Ther., October 1, 1998; 287(1): 167 - 186. [Abstract] [Full Text] |
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B. Stoffel-Wagner, M. Watzka, S. Steckelbroeck, L. Wickert, J. Schramm, G. Romalo, D. Klingmüller, and H.-U. Schweikert Expression of 5{alpha}-Reductase in the Human Temporal Lobe of Children and Adults J. Clin. Endocrinol. Metab., October 1, 1998; 83(10): 3636 - 3642. [Abstract] [Full Text] |
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C. H. R. Wetzel, B. Hermann, C. Behl, E. Pestel, G. Rammes, W. Zieglgänsberger, F. Holsboer, and R. Rupprecht Functional Antagonism of Gonadal Steroids at the 5-Hydroxytryptamine Type 3 Receptor Mol. Endocrinol., September 1, 1998; 12(9): 1441 - 1451. [Abstract] [Full Text] |
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E. Romeo, A. Ströhle, G. Spalletta, F. d. Michele, B. Hermann, F. Holsboer, A. Pasini, and R. Rupprecht Effects of Antidepressant Treatment on Neuroactive Steroids in Major Depression Am J Psychiatry, July 1, 1998; 155(7): 910 - 913. [Abstract] [Full Text] |
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A. G HERZOG, A. SOTREL, and M. RONTHAL Reversible proximal myopathy in epilepsy related Cushing's syndrome J. Neurol. Neurosurg. Psychiatry, July 1, 1998; 65(1): 134 - 134. [Full Text] |
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J. C. Crabbe Provisional Mapping of Quantitative Trait Loci for Chronic Ethanol Withdrawal Severity in BXD Recombinant Inbred Mice J. Pharmacol. Exp. Ther., July 1, 1998; 286(1): 263 - 271. [Abstract] [Full Text] |
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E. R. de Kloet, E. Vreugdenhil, M. S. Oitzl, and M. Joëls Brain Corticosteroid Receptor Balance in Health and Disease Endocr. Rev., June 1, 1998; 19(3): 269 - 301. [Abstract] [Full Text] |
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A. R. Genazzani, F. Petraglia, F. Bernardi, E. Casarosa, C. Salvestroni, A. Tonetti, R. E. Nappi, S. Luisi, M. Palumbo, R. H. Purdy, et al. Circulating Levels of Allopregnanolone in Humans: Gender, Age, and Endocrine Influences J. Clin. Endocrinol. Metab., June 1, 1998; 83(6): 2099 - 2103. [Abstract] [Full Text] |
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G. E. Duncan, D. J. Knapp, S. W. Carson, and G. R. Breese Differential Effects of Chronic Antidepressant Treatment on Swim Stress- and Fluoxetine-Induced Secretion of Corticosterone and Progesterone J. Pharmacol. Exp. Ther., May 1, 1998; 285(2): 579 - 587. [Abstract] [Full Text] |
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A. Poletti, P. Negri-Cesi, M. Rabuffetti, A. Colciago, F. Celotti, and L. Martini Transient Expression of the 5{alpha}-Reductase Type 2 Isozyme in the Rat Brain in Late Fetal and Early Postnatal Life Endocrinology, April 1, 1998; 139(4): 2171 - 2178. [Abstract] [Full Text] [PDF] |
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J. D. Laiprasert, R. C. Rogers, and C. M. Heesch Neurosteroid modulation of arterial baroreflexsensitive neurons in rat rostral ventrolateral medulla Am J Physiol Regulatory Integrative Comp Physiol, April 1, 1998; 274(4): R903 - R911. [Abstract] [Full Text] [PDF] |
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C. Cascio, V. V. K. Prasad, Y. Y. Lin, S. Lieberman, and V. Papadopoulos Detection of P450c17-independent pathways for dehydroepiandrosterone (DHEA) biosynthesis in brain glial tumor cells PNAS, March 17, 1998; 95(6): 2862 - 2867. [Abstract] [Full Text] [PDF] |
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