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Nilsson, J., ?stergaard Nielsen, E., Liljefors, T., Nielsen, M. and Sterner, O. (2008) Azaflavones compared to flavones as ligands at the benzodiazepine site of brain GABAA receptors. Bioorganic and Medicinal Chemistry Letters, 18, 5713-5716. doi:10.1016/j.bmcl.2008.09.092

has been cited by the following article:

• TITLE: 3-Arylisothiazoloquinols As Potent Ligands for the Benzodiazepine Site of GABAA Receptors

  AUTHORS: Jakob Nilsson, Elsebet Østergaard Nielsen, Tommy Liljefors, Mogens Nielsen, Olov Sterner

  KEYWORDS: Isothiazolo[5, 4-b]quinolin-4(9H)-ones; Isoxazolo[5, 4-b]quinolin-4(9H)-ones; Benzodiazepine binding site; GABAA Receptors; GABAA Receptor Subtypes; Pharmacophore Model

  JOURNAL NAME: Journal of Biomedical Science and Engineering, Vol.5 No.1, January 12, 2012

  ABSTRACT: 3-Arylisothiazolo[5,4-b]quinolin-4(9H)-ones and 3-arylisoxazolo[5,4-b]quinolin-4(9H)-ones were synthesized and assayed for affinity for the benzodiazepine binding site of the GABAA receptors. While the 3-arylisothiazoloquinolin-4-ones were found to be potent ligands, with affinities (expressed as the affinity Ki value) down to 1 nM, the 3-arylisoxazoloquinolin-4-ones are less potent. This is suggested to depend on sterical repulsive interaction of the 3-arylisoxazoloquinolin-4-ones with the receptor essential volume of the binding site, and a higher electron density at the nitrogen in the azole ring (N-2) as well as the carbonyl oxygen in the isothiazoloquinolin-4-ones enabling them to interact stronger with hydrogen bond donor sites at the binding site.