Chemical Name:(1,2,5,6-Tetrahydropyridin-4-yl)methylphosphinic acid
Biological Activity:
A selective, competitive GABAC
antagonist with only minimal effects on GABAA and GABAB
receptors (Kbvalues are 2.1 μM (antagonist), 320 μM
(antagonist) and EC50 ~ 500 μM
(weak agonist) respectively). Displays 8-fold selectivity for human recombinant
r1 receptors over r2 receptors.
Murataet al (1996) The first selective antagonist for a GABAc
receptor. Bioorg.Med.Chem.Lett. 6 2073. Ragozzino et al
(1996) Design and in vitro pharmacology of a selective γ-aminobutyric
acidc receptor antagonist. Mol.Pharmacol. 50 1024. Chebibet al (1998) GABAC receptor antagonists differentiate between
human r1 and r2 receptors expressed in Xenopus oocytes.
Eur.J.Pharmacol. 357 227.
Selective antagonist of neuro-steroid potentiation and direct gating of GABAA receptors. Selectively reduces the effects of 5α-reduced steroids compared to 5β-reduced steroids & displays no effect on potentiation evoked by barbiturates & benzodiazepines. Attenuates 3α,5α-THP-induced loss of righting reflex and total sleep time following i.c.v administration in rats.