CY-09

CY-09 specifically blocks NLRP3 activation in macrophages. CY-09 inhibits NLRP3 oligomerization and inflammasome assembly. CY-09 directly binds to NLRP3 and inhibits its ATPase activity. The metabolic stability of CY-09 was first evaluated using human and mouse liver microsomes, exhibiting favorable stability with the half-life >145 min for both human and mouse microsomes. The metabolic stability of CY-09 was first evaluated using human and mouse liver microsomes, exhibiting favorable stability with the half-life >145 min for both human and mouse microsomes, which exhibited low risk of drug-drug interactions^[1].

CY-09 inhibits NLRP3 activation in vivo and prevents neonatal lethality in a mouse model of CAPS. In pharmacokinetic studies evaluted in C57BL/6J mice administered a single i.v. or oral dose, CY-09 exhibits favorable pharmacokinetics, with a half-life of 2.4 h, an area under the curve of 8,232 (h·ng)/ml, and bioavailability of 72%. CY-09 reverses metabolic disorders in diabetic mice by inhibition of NLRP3-dependent inflammation. CY-09 treatment has remarkable beneficial effects for metainflammation, hyperglycemia, and insulin resistance in diabetic mice^[1].

5 × 10⁵/ml BMDMs and 6 × 10⁶/ml PBMCs were plated in 12-well plates. The following morning, the medium was replaced, and cells were stimulated with 50 ng/ml LPS or 400 ng/ml Pam3CSK4 (for noncanonical inflammasome activation) for 3 h. After that, CY-09 or other inhibitors were added into the culture for another 30 min, and then the cells were stimulated for 4 h with MSU (150 µg/ml), Salmonella typhimurium (multiplicity of infection) or for 30 min with ATP (2.5 mM) or nigericin (10 µM). Cells were transfected with poly(dA:dT) (0.5 µg/ml) for 4 h or LPS (500 ng/ml) overnight. Cell extracts and precipitated supernatants were analyzed by immunoblot.

• [1] Jiang H, et al. J Exp Med. 2017, 214(11):3219-3238.