GSK356278

• CAT Number: I007107
• CAS Number: 720704-34-7
• Molecular Formula: C21H25N7O2S
• Molecular Weight: 439.53
• Purity: ≥95%
• Synonyms: 5-[5-[(2,4-dimethyl-1,3-thiazol-5-yl)methyl]-1,3,4-oxadiazol-2-yl]-1-ethyl-N-(oxan-4-yl)pyrazolo[3,4-b]pyridin-4-amine
• InChI: InChI=1S/C21H25N7O2S/c1-4-28-20-15(11-23-28)19(25-14-5-7-29-8-6-14)16(10-22-20)21-27-26-18(30-21)9-17-12(2)24-13(3)31-17/h10-11,14H,4-9H2,1-3H3,(H,22,25)
• InChIKey: AWDJJMXJUOHGLC-UHFFFAOYSA-N
• SMILES: CCN1C2=NC=C(C(=C2C=N1)NC3CCOCC3)C4=NN=C(O4)CC5=C(N=C(S5)C)C

GSK356278 is a potent, selective, orally bioavailable and brain-penetrant inhibitor of phosphodiesterase 4 (PDE4), with pIC50s of 8.6, 8.8, and 8.7 for human PDE4A, PDE4B, and PDE4D, respectively. GSK356278 has anti-inflammatory activity, and exhibits anxiolytic and cognition-enhancing effects[1].
GSK356278 competes with [3H]rolipram for the high affinity rolipram binding site (HARBS) with a pKi of 8.6 in a competitive filtration-binding assay to the recombinant human PDE4B2B enzyme expressed in yeast membranes[1].
GSK356278 bounds to the HARBS in rats, mice, marmosets, and ferrets with pKis of 7.9, 7.8, 8.4, and 8.5, respectively[1].
GSK356278 inhibits LPS-induced release of TNF-α in human whole blood, with a pIC50 of 7.6[1].
GSK356278 (0.003-30 mg/kg; p.o.) shows anti-inflammatory activity in rodents at exposures that does not induce pica feeding[1].
GSK356278 (0.1-0.1 mg/kg; p.o.) demonstrates efficacy in a nonhuman primate model of anxiety at exposures that do not induce emesis[1].
GSK356278 (4 doses at 0.03, 0.1, 0.3, and 1.0 mg/kg for 6 weeks; p.o.) enhances performance in a nonhuman primate object retrieval test[1].
GSK356278 exhibits oral bioavailability (rat 91%, monkey 23%) and Cmax (rat 205, monkey 41 nM) following oral administration (rat 1, monkey 0.2 mg/kg)[1].
GSK356278 exhibits terminal elimination half-lives (rat 2.2, monkey 1.5 h) due to moderate blood clearance (rat 40, monkey 16 mL/min/kg) combined with volumes of distribution (rat 6.3, monkey 2.1 L/kg) following intravenous administration (rat 1, monkey 0.2 mg/kg)[1].

Reference

[1]. Rutter AR, et, al. GSK356278, a potent, selective, brain-penetrant phosphodiesterase 4 inhibitor that demonstrates anxiolytic and cognition-enhancing effects without inducing side effects in preclinical species. J Pharmacol Exp Ther. 2014 Jul;350(1):153-6
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