Introduction: The expression profile of the CD22 antigen and its role in B-cell function make it an important target in B-cell leukemias and lymphomas. Inotuzumab ozogamicin (IO), a humanized monoclonal antibody targeting CD22, is one of the most promising monoclonal antibodies for the treatment of relapsed/refractory B-cell acute lymphoblastic leukemia (ALL).
Areas Covered: This article reviews the current literature of IO in adult leukemias and lymphomas.
Expert Opinion: Single-agent IO has demonstrated activity in patients with relapsed B-cell ALL and non-Hodgkin lymphoma (NHL). It has also demonstrated favorable early results when combined with chemotherapy in older patients with ALL. There is potential for IO to be combined with other targeted therapies under development for these diseases; data are still early and further studies of IO are warranted. While the pivotal randomized study of IO for relapsed NHL versus physician's choice did not show a statistically significant advantage in response rate, the results of the pivotal study in ALL are not yet available.
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http://dx.doi.org/10.1517/14712598.2015.1024652 | DOI Listing |
Background: CD58 loss has been described as a mechanism of resistance to blinatumomab and chimeric antigen receptor T-cell therapy, functioning as a modulator of response to T-cell activation.
Methods: Using flow cytometry, we evaluated the impact of CD58 mean fluorescence intensity (MFI) on the probability of achieving measurable residual disease (MRD) negativity in patients with B-cell acute lymphoblastic leukemia treated with inotuzumab ozogamicin (InO).
Results: The odds ratio of achieving MRD negativity was 1.
J Oncol Pharm Pract
January 2025
Department of Pharmacy Practice, Massachusetts College of Pharmacy and Health Sciences School of Pharmacy, Boston, MA, USA.
Purpose: Sinusoidal obstructive syndrome (SOS)/veno-occlusive disease (VOD) is a serious complication in hematopoietic stem-cell transplant (HSCT) patients. Gemtuzumab-ozogamicin (GO) and InO are known to cause SOS/VOD in leukemic and transplant populations. Due to limited data on ursodiol prophylaxis in non-HSCT patients, we aimed to assess hepatotoxicity, SOS/VOD incidences, time to hepatotoxicity, and confirmed SOS/VOD in adults receiving GO or InO ± ursodiol.
View Article and Find Full Text PDFCancers (Basel)
December 2024
Division of Hematology and Oncology, Department of Medicine, Mayo Clinic, Jacksonville, FL 32224, USA.
The treatment of Philadelphia chromosome-positive B-cell acute lymphoblastic leukemia (Ph+ B-cell ALL) has seen substantial progress over the past two decades. The introduction of tyrosine kinase inhibitor (TKIs) has resulted in dramatic improvements in long-term survival. Allogeneic hematopoietic stem cell transplantation (allo-HSCT), with its curative potential, has always been an integral part of the treatment algorithm of Ph+ ALL.
View Article and Find Full Text PDFBlood
December 2024
St. Jude Children's Research Hospital, Memphis, Tennessee, United States.
Inotuzumab Ozogamicin (InO) is an antibody-calicheamicin conjugate with striking efficacy in B-cell acute lymphoblastic leukemia (B-ALL). However, there is wide inter-patient variability in treatment response, and the genetic basis of this variation remains largely unknown. Using a genome-wide CRISPR screen, we discovered the loss of DNTT as a primary driver of InO resistance.
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