SB-205384

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SB-205384
SB-205384.png
Legal status
Legal status
Identifiers
  • But-2-ynyl 4-amino-7-hydroxy-2-methyl-5,6,7,8-tetrahydro-[1]benzothiolo[3,2-e]pyridine-3-carboxylate
CAS Number
PubChem CID
ChemSpider
CompTox Dashboard (EPA)
Chemical and physical data
Formula C17H18N2O3S
Molar mass 330.40 g·mol−1
3D model (JSmol)
  • CC#CCOC(=O)c1c(C)nc2sc3CC(O)CCc3c2c1N
  • InChI=1S/C17H18N2O3S/c1-3-4-7-22-17(21)13-9(2)19-16-14(15(13)18)11-6-5-10(20)8-12(11)23-16/h10,20H,5-8H2,1-2H3,(H2,18,19) X mark.svgN
  • Key:JDTZAGLGBRRCJT-UHFFFAOYSA-N X mark.svgN
 X mark.svgNYes check.svgY  (what is this?)    (verify)

SB-205384 is an anxiolytic drug. It has similar effects to benzodiazepine drugs, but is structurally distinct and so is classed as a nonbenzodiazepine anxiolytic.

SB-205384 is a GABAA positive allosteric modulator, which binds preferentially to α3, α5, and α6 subunit containing subtypes. [1] [2] It has a novel mechanism of action, prolonging the duration of GABA-mediated chloride flux but without increasing the intensity of the response, and this may give it an unusual pharmacological profile, [3] with tests showing that it alters the firing of some populations of neurons while leaving others unaffected. [4] Animal studies have shown it to produce both anxiolytic and anti-aggressive effects, but with little sedation or other behavioural changes. [5] [6]

Related Research Articles

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The GABA receptors are a class of receptors that respond to the neurotransmitter gamma-aminobutyric acid (GABA), the chief inhibitory compound in the mature vertebrate central nervous system. There are two classes of GABA receptors: GABAA and GABAB. GABAA receptors are ligand-gated ion channels ; whereas GABAB receptors are G protein-coupled receptors, also called metabotropic receptors.

GABA<sub>A</sub> receptor Ionotropic receptor and ligand-gated ion channel

The GABAA receptor (GABAAR) is an ionotropic receptor and ligand-gated ion channel. Its endogenous ligand is γ-aminobutyric acid (GABA), the major inhibitory neurotransmitter in the central nervous system. Upon opening, the GABAA receptor on the postsynaptic cell is selectively permeable to chloride ions (Cl) and, to a lesser extent, bicarbonate ions (HCO3). Depending on the membrane potential and the ionic concentration difference, this can result in ionic fluxes across the pore. If the membrane potential is higher than the equilibrium potential (also known as the reversal potential) for chloride ions, when the receptor is activated Cl will flow into the cell. This causes an inhibitory effect on neurotransmission by diminishing the chance of a successful action potential occurring at the postsynaptic cell. The reversal potential of the GABAA-mediated inhibitory postsynaptic potential (IPSP) in normal solution is −70 mV, contrasting the GABAB IPSP (-100 mV).

The GABAA-rho receptor is a subclass of GABAA receptors composed entirely of rho (ρ) subunits. GABAA receptors including those of the ρ-subclass are ligand-gated ion channels responsible for mediating the effects of gamma-amino butyric acid (GABA), the major inhibitory neurotransmitter in the brain. The GABAA-ρ receptor, like other GABAA receptors, is expressed in many areas of the brain, but in contrast to other GABAA receptors, the GABAA-ρ receptor has especially high expression in the retina.

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<span class="mw-page-title-main">Bretazenil</span> Chemical compound

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<span class="mw-page-title-main">Allopregnanolone</span> Endogenous inhibitory neurosteroid

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<span class="mw-page-title-main">GABRA2</span> Protein in humans

Gamma-aminobutyric acid receptor subunit alpha-2 is a protein in humans that is encoded by the GABRA2 gene.

<span class="mw-page-title-main">GABRD</span>

Gamma-aminobutyric acid receptor subunit delta is a protein that in humans is encoded by the GABRD gene. In the mammalian brain, the delta (δ) subunit forms specific GABAA receptor subtypes by co-assembly leading to δ subunit containing GABAA receptors.

<span class="mw-page-title-main">ROD-188</span> Chemical compound

ROD-188 is a sedative drug that was structurally derived from the GABAA antagonist bicuculline by a team at Roche. Unlike bicuculline, ROD-188 acts as an agonist at GABAA receptors, being a positive allosteric modulator acting at a novel binding site distinct from those of benzodiazepines, barbiturates or muscimol, with its strongest effect produced at the α6β2γ2 subtype of the GABAA receptor. ROD-188 is one of a number of related compounds acting at this novel modulatory site, some of which also act at benzodiazepine receptors.

<span class="mw-page-title-main">ELB-139</span> Chemical compound

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<span class="mw-page-title-main">TPA-023</span> Chemical compound

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<span class="mw-page-title-main">L-655,708</span> Chemical compound

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<span class="mw-page-title-main">PWZ-029</span> Chemical compound

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<span class="mw-page-title-main">GS-39783</span>

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GABA<sub>A</sub> receptor positive allosteric modulator

In pharmacology, GABAA receptor positive allosteric modulators are positive allosteric modulator (PAM) molecules that increase the activity of the GABAA receptor protein in the vertebrate central nervous system.

A GABAA receptor negative allosteric modulator is a negative allosteric modulator (NAM), or inhibitor, of the GABAA receptor, a ligand-gated ion channel of the major inhibitory neurotransmitter γ-aminobutyric acid (GABA). They are closely related and similar to GABAA receptor antagonists. The effects of GABAA receptor NAMs are functionally the opposite of those of GABAA receptor positive allosteric modulators (PAMs) like the benzodiazepines, barbiturates, and ethanol (alcohol). Non-selective GABAA receptor NAMs can produce a variety of effects including convulsions, neurotoxicity, and anxiety, among others.

References

  1. Heidelberg LS, Warren JW, Fisher JL (October 2013). "SB-205384 is a positive allosteric modulator of recombinant GABAA receptors containing rat α3, α5, or α6 subunit subtypes coexpressed with β3 and γ2 subunits". The Journal of Pharmacology and Experimental Therapeutics. 347 (1): 235–41. doi:10.1124/jpet.113.207324. PMC   3781410 . PMID   23902941.
  2. Meadows HJ, Kumar CS, Pritchett DB, Blackburn TP, Benham CD (March 1998). "SB-205384: a GABA(A) receptor modulator with novel mechanism of action that shows subunit selectivity". British Journal of Pharmacology. 123 (6): 1253–9. doi:10.1038/sj.bjp.0701721. PMC   1565273 . PMID   9559912.
  3. Meadows HJ, Harries MH, Thompson M, Benham CD (August 1997). "Effect of SB-205384 on the decay of GABA-activated chloride currents in granule cells cultured from rat cerebellum". British Journal of Pharmacology. 121 (7): 1334–8. doi:10.1038/sj.bjp.0701251. PMC   1564816 . PMID   9257911.
  4. Ing T, Poulter MO (February 2007). "Diversity of GABA(A) receptor synaptic currents on individual pyramidal cortical neurons". The European Journal of Neuroscience. 25 (3): 723–34. doi:10.1111/j.1460-9568.2007.05331.x. PMID   17313570. S2CID   9361003.
  5. Navarro JF, Burón E, Martín-López M (February 2006). "Anxiolytic-like activity of SB-205384 in the elevated plus-maze test in mice". Psicothema. 18 (1): 100–4. PMID   17296016.
  6. Navarro JF, Burón E, Martín-López M (February 2008). "Effects of SB-205384, a positive modulator of alpha3-subunit-containing GABA-A receptors, on isolation-induced aggression in male mice". Psicothema. 20 (1): 144–7. PMID   18206077.