RO9021

The inhibitory potency to SYK is determined in a radiometric assay using inactive SYK kinase. Briefly, SYK protein is dephosphorylated by PTP1B phosphatase and then the reaction is initiated by the addition of substrate cocktail that contained 20 μM ATP, 0.025 μCi ATP-γ-³³P and 10 μM biotinylated synthetic peptide. The reaction is carried out for 30 minutes and resulting ³³P incorporation is determined by top counter.

MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

Briefly, DBA1/J male mice are injected intradermally with 0.1 mL bovine type II collagen (100 μg) and complete Freund’s adjuvant followed by second immunization on day 21 with bovine type II collagen and incomplete Freund adjuvant. RO9021 is administered orally, randomized into different groups (14 mice/groups), every day for 14 days starting on the day after second immunization. Clinical arthritis scores (1 to 4) of individual paws are assessed and the arthritic index for each mouse is determined by adding the individual scores of all four paws. The level of cytokines in serum is determined by Luminex analysis.

MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.