Repositioning Candidate Details
| Candidate ID: | R0893 |
| Source ID: | DB05889 |
| Source Type: | approved; investigational |
| Compound Type: | biotech |
| Compound Name: | Inotuzumab ozogamicin |
| Synonyms: | Inotuzumab ozogamicin |
| Molecular Formula: | -- |
| SMILES: | -- |
| DrugBank Description: | Inotuzumab ozogamicin is an antibody-drug conjugate using linker and cytotoxic drug technology similar to that developed for the ground-breaking treatment Mylotarg (), which was approved by the US FDA in 2000 for the treatment of acute myeloid leukaemia. Inotuzumab ozogamicin consists of a recombinant humanised IgG4 kappa CD22-targeting monoclonal antibody covalently attached to calicheamicin derivative, N-acetyl-gamma-calicheamicin dimethylhydrazide, which is a potent DNA-binding cytotoxic agent . Developed by Pfizer and UCB, inotuzumab ozogamicin was granted approval by EU in June 2017 followed by FDA on August 17th, 2017 for the treatment of adults with relapsed or refractory B-cell precursor acute lymphoblastic leukemia (ALL). ALL is a rapidly progressing cancer of the bone marrow that is associated with high mortality rates and low therapeutic response from standard chemotherapies in relasping conditions. In a randomized trial, inotuzumab ozogamicin displayed higher percentages of patients undergoing longer periods of complete remission with no evidence of disease in comparison to patients receiving alternative chemotherapy . |
| CAS Number: | 635715-01-4 |
| Molecular Weight: | |
| DrugBank Indication: | Indicated as monotherapy for the treatment of adults with relapsed or refractory CD22-positive B cell precursor acute lymphoblastic leukaemia (ALL). |
| DrugBank Pharmacology: | Inotuzumab ozogamicin is an antineoplastic agent that targets CD22 antigen expressed on immature B-cell lymphocytes and blocks further growth of tumor cells. The drug aims to restore normal blood counts and achieve complete remission from the disease. QT interval prolongation was observed in patients receiving inotuzumab ozogamicin. |
| DrugBank MoA: | Inotuzumab ozogamicin is comprised of cytotoxic antibiotic N-acetyl-gamma-calicheamicin dimethylhydrazide attached to a humanized monoclonal IgG4 antibody via 4-(4 acetylphenoxy) butanoic acid (acetyl butyrate) linker. The drug exerts a potent cytotoxic effect against CD22+ B-cell lymphoma when the antibody binds to the CD22 receptor on the surface of B cells . The drug-CD22 complex is rapidly internalized into the cell, forming an endosome which subsequently fuses with lysosomes. N-acetyl-gamma-calicheamicin dimethylhydrazide is then intracellularly released into the acidic environment. N-acetyl-gamma-calicheamicin dimethylhydrazide is a calicheamicin derivative, which is naturally produced by the bacterium Micromonospora echinospora, and is toxic to the body when not bound to the antibody. It mediates apoptosis of the cell by binding to the minor groove of DNA in a sequence-specific manner and undergoing a structural change to generate diradicals . These changes abstract hydrogen ions from the phosphodiester bonds of double-stranded DNA, resulting in breaks and cell apoptosis . |
| Targets: | B-cell receptor CD22 antibody |
| Inclusion Criteria: | Therapeutic strategy associated |
