In vitro activity: In AP-1-transfected cells, FR180204 dose-dependently inhibits AP-1 transactivation with IC50 of 3.1 μM. FR 180204 inhibits spontaneous mesothelioma cell growth.

Kinase Assay: Nunc-Immuno MaxiSorp plates are coated with 20 μg/ml MBP solution in phosphate-buffered saline (PBS). After washing with PBS containing 0.05% Tween 20 (T-PBS), blocking buffer (T-PBS containing 3% BSA) is added to each well and the plates are incubated for 10 min at room temperature. After washing with T-PBS, chemical compounds, ATP and recombinant ERK2 diluted in assay dilution buffer (20 mM Mops, pH 7.2, 25 mM β-glycerol phosphate, 5 mM EGTA, 1 mM sodium orthovanadate, 1 mM dithiothreitol, and 50 μg/ml BSA) and are added to each well. Vehicle groups (containing 0.1% DMSO) and kinase-withdrawal groups are used for the control and basal determinations. After incubation for 1 h at room temperature, plates are washed twice with T-PBS. Anti-phospho MBP antibody (0.2 μg/ml) is added to each well, and the plates are incubated for 1 h at room temperature. After washing, anti-mouse HRP-conjugated polyclonal antibodies are added and the plates were incubated for 30 min. SuperSignal chemiluminescent substrate is used for the measurement of HRP activity according to the manufacturer’s instructions. Prism 4.0 software is used for the Lineweaver–Burk plot analysis, IC50 and Ki determinations.

Cell Assay: Cell viability is assayed by the method using MTT. MTT-reactive cells are quantified at an absorbance of 570 nm using a micro-plate reader.

Naunyn Schmiedebergs Arch Pharmacol. 2007 Jan;374(4):311-6.