When the same linker was used to connect to the phenol of the cyclopropabenzindolone (CBI) (P1), the resulting ADC1 showed loss of potency in CD22 target-expressing cancer cell lines (e.g., BJAB, WSU-DLCL2).
This is a pivotal, multicenter, open-label study of moxetumomab pasudotox, a recombinant CD22-targeting immunotoxin, in hairy cell leukemia (HCL), a rare B cell malignancy with high CD22 expression.
The specificity of NANA-QDs nanoparticles for CD22 on living cancer cells was validated by cellular uptake inhibition assays, colocalization of the immunofluorescence staining with both anti-CD22 antibody and NANA-QDs nanoparticles.