AT-56 (1-30 μM; 10 minutes) dose-dependently inhibits the production of PGD 2 in L-PGDS-expressing human medulloblastoma TE-671 cells with an IC 50 of about 3 μM.
AT-56 ( 1-30 mg/kg; p.o.) suppresses the PGD 2 production in the stab-wounded brain. AT-56 (1-10 mg/kg; p.o.) suppresses the L-PGDS-mediated allergic airway inflammation in mice. AT-56 (10 mg/kg; p.o.) exhibits C max (2.15 μg/ml), half-life (1.71 h) and high oral bioavailability (82%).