CAY10787 is an oxysterol and a negative allosteric modulator of GABAA receptors.1,2 It reduces GABA-induced currents in HEK cells expressing α1β1γ2 or α4β3γ2 subunit-containing GABAA receptors (IC50s = 1.5 and 1 µM, respectively).2 CAY10787 (500 nM) reduces GABA-induced depolarization of peptidergic and non-peptidergic nociceptors, C-LTMRs, and cold thermosensors in isolated mouse dorsal root ganglion (DRG) neurons. In vivo, CAY10787 (2, 10, and 50 mg/kg) increases latency to nocifensive behaviors in the hot plate test in mice.
1.Hahn, M., Tang, M., and Subbiah, M.T.Cholest-3,5-dien-7-one formation in peroxidized human plasma as an indicator of lipoprotein cholesterol peroxidation potentialBiochim. Biophys. Acta1255(3)341-343(1995) 2.Niu, C., Leavitt, L.S., Lin, Z., et al.Neuroactive type-A γ-aminobutyric acid receptor allosteric modulator steroids from the hypobranchial gland of marine mollusk, Conus geographusJ. Med. Chem.64(10)7033-7043(2021)