Immunotherapies targeting CD19 (blinatumomab) and CD22 (inotuzumab ozogamicin) have demonstrated higher complete response rates and improved survival compared with chemotherapy in relapsed/refractory acute lymphoblastic leukemia (ALL), and are now standard of care in the relapsed setting.
We examined treatment with sequential infusion of humanized CD19-modified and CD22-modified CAR-T cells in a patient with relapsed ALL previously exposed to murine-derived anti-CD19 CAR-T cells.
This study evaluated the safety, antitumor activity, pharmacokinetics, and pharmacodynamics of inotuzumab ozogamicin (InO) for CD22-positive relapsed/refractory acute lymphoblastic leukemia.