Inhibition studies of AZD1480 are performed using recombinant Jak1, Jak2, or Jak3 under buffer conditions of 50 mM HEPES pH 7.3, 1 mM DTT, 0.01% Tween-20, 50 mM/mL BSA, and 10 mM MgCl₂. Jak3 enzyme is expressed as N-terminal GST fusion in insect cells and purified by glutathione-affinity and size-exclusion chromatographies. Enzymes are assayed in the presence of AZD1480 (10 point dose response, in triplicate, from 8.3 μM to 0.3 nM in half-log dilution steps) using 1.5 μM peptide substrate (Jak1: FITC-C6-KKHTDDGYMPMSPGVA-NH2, Jak2 and Jak3: FAM-SRCtide) and screened under their respective ATP K_m (Jak1: 55 μM, Jak2: 15 μM, Jak3: 3 μM) and approximated physiological ATP concentration of 5 mM. Phosphorylated and unphosphorylated peptides are separated and quantified by a Caliper LC3000 system for calculating percent inhibition.

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

Renca or 786-O cells are suspended in DMEM medium with 5% FBS, and seeded in 96-well plates (5×10³ per well) to allow adhesion and then treated with DMSO or AZD1480 for 48 hours. Cell viability is determined by MTS assay. Absorbance at 490 nm is measured with Mikrotek Laborsysteme. Mouse endothelial cells and splenic CD11b+/c- myeloid cells are enriched from tumor-bearing mice,and cultured in 5% FBS RPMI-1640 medium. HUVECs are cultured on collagen 1-coated plates in complete medium. All cells are treated with DMSO and AZD1480 at various doses for 24 hours. Cell viability is determined by counting cell number manually. All the experiments are repeated 3 times.

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

For subcutaneous (s.c.) tumor model, 2.5×10⁶ Renca or 786-O cells suspended in 100 μL PBS are injected into the flank of BALB/c or nude mice, respectively. When average tumor volume reaches approximately 100-150 mm³, AZD1480 or vehicle is administered by oral gavage either once a day at the dose of 50 mg/kg, or twice daily at 30 mg/kg, as indicated. Tumor size is measured by caliper every other day. For experimental lung metastasis model, 0.1×10⁶ Renca or 1×10⁶ 786-O cells suspended in 500 μL PBS are injected via tail vein to BALB/c or nude mice, respectively. Three days later, mice are orally treated with AZD1480 (50 mg/kg/d) or vehicle for 21 days for Renca tumors and 60 days for 786-O tumors respectively. For the Calu-6 model, 3×10⁶ tumor cells in matrigel are implanted s.c. into the flanks of nude mice, randomized into vehicle (twice daily, BID) and drug treatment (AZD1480, 30 mg/kg BID) groups, and dosed orally daily for 19 days. For spontaneous lung metastasis model, 2×10⁵ 4T1 cells suspended in 100 μL PBS are injected in the mammary gland of female BALB/c mice by gently penetrating the skin. AZD1480 (50 mg/kg/d) or vehicle is given orally for 21 days.

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

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