Besponsa (inotuzumab ozogamicin)

P2, N=25, Suspended, University of Chicago | Recruiting --> Suspended

P2, N=84, Recruiting, National Cancer Institute (NCI) | N=64 --> 84

P3, N=750, Not yet recruiting, Charite University, Berlin, Germany

In this context, monoclonal antibodies such as blinatumomab and inotuzumab ozogamicin (InO), used alone or in combination with reduced-intensity chemotherapy, have emerged as promising frontline approaches capable of deep remissions with improved tolerability. Across all treatment strategies, comprehensive geriatric assessment appears more informative than performance status alone in predicting tolerability and outcome, supporting its integration into trial design and routine decision-making. Overall, the refinement of immunotherapeutic approaches, coupled with biologically and geriatrically tailored treatment algorithms, offers the most promising avenue to improve long-term outcomes for older patients with ALL.

P2, N=20, Not yet recruiting, Institute of Hematology & Blood Diseases Hospital, China

P3, N=310, Suspended, Alliance for Clinical Trials in Oncology | Trial completion date: Aug 2026 --> Aug 2027 | Trial primary completion date: Mar 2026 --> Mar 2027

Currently, most leukemias are effectively treated with immunotherapies (highly effective monoclonal antibodies targeting CD19 [blinatumomab], or CD22 [inotuzumab ozogamicin]), BCR::ABL1 tyrosine kinase inhibitors (TKIs; e.g., dasatinib, ponatinib), Bruton TKIs (e.g., ibrutinib, acalabrutinib), BCL-2 inhibitors (venetoclax), IDH1/2 inhibitors (ivosidenib, olutasidenib, and enasidenib), FLT3 inhibitors (e.g., midostaurin, quizartinib, and gilteritinib), menin inhibitors (revumenib, ziftomenib), and chimeric antigen receptor T-cell therapies. Herein, we provide a high-level overview of prominent clinical developments across all leukemias. In contemporary times, harnessing the benefits of novel targeted therapies and the evolving treatment landscape bolster the optimistic view that most, if not all, leukemias are curable.

Despite recent advancements, patients with B-cell ALL tend to have poorer outcomes, especially in the adult population. Future research and larger scale prospective studies are indicated to evaluate the efficacy of InO in different lines of therapy.

P2/3, N=765, Not yet recruiting, Charite Universitaetsmedizin Berlin KR

P3, N=5951, Recruiting, Children's Oncology Group | Trial completion date: Mar 2030 --> Mar 2032 | Trial primary completion date: Mar 2030 --> Mar 2032

This review summarizes recent advances in the application of low-intensity chemotherapy, CD19/CD22-targeting antibodies such as blinatumomab and inotuzumab ozogamicin, the BCL-2 inhibitor venetoclax, and chimeric antigen receptor (CAR) T-cell therapy for elderly pH⁻ B-ALL patients. Clinical studies indicate that these strategies can increase remission rates and survival while reducing treatment-related toxicity, offering particular benefit to older patients who are unsuitable for intensive chemotherapy. Future efforts should focus on optimizing combination and sequential regimens, as well as personalizing treatment approaches to further improve efficacy and safety.

Targeted therapies, such as tyrosine kinase inhibitors for Philadelphia chromosome-positive ALL, Chimeric Antigen Receptor T cell therapy for relapsed or refractory cases, and monoclonal antibodies like blinatumomab and inotuzumab ozogamicin, have transformed treatment outcomes while reducing chemotherapy-related toxicity. Despite these advances, challenges remain, including the development of therapy resistance (e.g., BCR-ABL1 and FLT3 mutations) and long-term adverse effects such as cardiotoxicity and secondary malignancies. This narrative review summarizes recent innovations in risk assessment and targeted therapies, highlights current challenges, and discusses future directions to optimize personalized pediatric leukemia care.