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APY0201 is a potent PIKfyve inhibitor, which inhibits the conversion of PtdIns3P to PtdIns(3,5)P2 in the presence of in the presence of [33P]ATP with an IC50 of 5.2 nM. APY0201 also inhibits IL-12/IL-23 production.

APY0201 works differently from anti-IL-12/23 antibodies and acts by inhibiting production of these proinflammatory cytokines with characteristic selectivity over other cytokines, including tumor necrosis factor-alpha (TNF-α). In stimulated thioglycollate-induced mouse peritoneal exudate cells (TG-PEC), APY0201 strongly inhibits IL-12p70 and IL-12p40 production, with IC50s of 8.4 and 16 nM, respectively. APY0201 also inhibits IL-12p40 at 99 nM in human PBMC. APY0201 shows significant selectivity for the production of IL-12p70 and IL-12p40 over TNF-α, and this selectivity is maintained across species[1].

Oral APY0201 at a 30 mg/kg dose shows significant reduction of IL-12p70 production (78% inhibition relative to that of the vehicle control), which implys that the inhibitory potential of APY0201 against IL-12 is confirmed in the animal experiment[1].

[1]. Hayakawa N, et al. Structure-activity relationship study, target identification, and pharmacological characterization of a small molecular IL-12/23 inhibitor, APY0201. Bioorg Med Chem. 2014 Jun 1;22(11):3021-9.

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