Activity of mesothelin targeting RITs on mesothelioma patient cells. Cells cultured from the pleural fluid or ascites of four mesothelioma patients (A) NCI-Meso16, (B) NCI-Meso19, (C) NCI-Meso21, and (D) NCI-Meso29) were treated with increasing concentrations of RITs. After 72 hours, cells were evaluated for viability using a WST-8 assay and IC50 were calculated. (E) Mean of IC50 for the four samples. Cells were treated in three replicas. Line represents mean, error bar show SEM