Chemical Name: 4-(4-Phenylbutoxy)-7H-furo[3,2-g]benzopyran-7-one
Biological ActivityPsora 4 is a potent KV1.3 channel blocker (EC50 = 3 nM). Preferentially binds the C-type inactivated state of the channel, similar to the activity of CP 339818 (Cat. No. 1399). Displays 17- to 70-fold selectivity over closely-related KV1 channels (KV1, KV2, KV4 and KV7); exhibits activity at KV1.5 (IC50 = 7.7 nM). Suppresses proliferation of human and rat myelin-specific effector memory T cells (EC50 values are 25 and 60 nM respectively).
The technical data provided above is for guidance only.
For batch specific data refer to the Certificate of Analysis.
Tocris products are intended for laboratory research use only, unless stated otherwise.
Voltage-gated potassium channel Kv1.3 regulates GLUT4 trafficking to the plasma membrane via a Ca2+-dependent mechanism.
Li et al.
Am.J.Physiol.Cell Physiol., 2006;290:C345
Kv1.3-blocking 5-phenylalkoxypsoralens: a new class of immunomodulators.
Vennekamp et al.
Design of PAP-1, a selective small molecule Kv1.3 blocker, for the suppression of effector memory T cells in autoimmune diseases.
Schmitz et al.
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Psora 4 was used on Kv3.1 channels in increasing concentrations to assess the blocking action exerted by Psora 4.Works ideally and gives publishable results.