Novel Therapeutic Approaches in Pediatric Acute Lymphoblastic Leukemia.
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Acute lymphoblastic leukemia (ALL) is the most common pediatric malignancy, characterized by the clonal proliferation of immature lymphoid precursors. The distinction between B-cell ALL (B-ALL) and T-cell ALL (T-ALL) is fundamental, as each subtype exhibits distinct cytomorphological, genetic, and clinical features influencing prognosis and therapeutic strategies. Conventional multi-phase chemotherapy has significantly improved survival rates, yet its efficacy is limited by severe short- and long-term toxicities, highlighting the need for more selective therapeutic approaches. Advances in molecular profiling have enabled the identification of key oncogenic pathways, paving the way for targeted therapies such as tyrosine kinase inhibitors (TKIs), JAK-STAT pathway inhibitors, BCL-2 antagonists, and agents modulating epigenetic and cell cycle regulators. Concurrently, immunotherapeutic strategies have transformed the therapeutic landscape of pediatric ALL. Bispecific antibodies such as blinatumomab (anti-CD19), antibody-drug conjugates like inotuzumab ozogamicin (anti-CD22), and monoclonal antibodies such as daratumumab (anti-CD38) have demonstrated efficacy in relapsed or refractory disease with improved safety profiles. Moreover, CAR-T-cell therapy, particularly CD19-directed products, has shown unprecedented remission rates in refractory B-ALL. The integration of targeted and immune-based therapies into conventional regimens represents a decisive step toward precision medicine, aiming to enhance survival outcomes while reducing treatment-related toxicity and improving quality of life in ALL children. This review aims to provide a comprehensive overview of the current understanding of ALL pathobiology and therapeutic approaches, with particular emphasis on the expanding role of immunotherapeutic strategies in pediatric disease.