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CAR-T Therapy Neurotoxicity May Not Always Be Inflammation-Related, Study Finds

• A recent study published in Blood investigated cases of quadriparesis or paraparesis following CAR-T therapy in children and adolescents. • The study found that in some instances, immune effector cell-associated neurotoxicity syndrome (ICANS) was not associated with inflammation. • Experts suggest neurotoxicity cases following CAR-T should be considered uniquely based on their phenotypes due to potentially different underlying pathophysiology. • These findings highlight the need for continued research into the diverse mechanisms of CAR-T-related toxicities to improve patient outcomes.

CAR-T therapy, a transformative treatment for hematologic malignancies, can cause neurotoxicity, but a recent study indicates that not all instances of immune effector cell-associated neurotoxicity syndrome (ICANS) are linked to inflammation. The research, published in Blood, examined cases of quadriparesis or paraparesis in children and adolescents following CAR-T treatment.
The study's first author, Dr. Caroline Diorio, an attending physician at the Cancer Center at Children's Hospital of Philadelphia, noted that CAR-T cells come with side effects that require rigorous attention, similar to the approach taken with long-established chemotherapies. The investigators found that ICANS was not always associated with inflammation, contrary to expectations.

Key Findings and Implications

The research highlights the importance of considering each case of neurotoxicity following CAR-T therapy individually, based on its specific characteristics. This is because the underlying causes of neurotoxicity may vary. According to Dr. Diorio, a deeper understanding of the diverse mechanisms behind these adverse events is crucial for optimizing patient care and outcomes.

Context of CAR-T Therapy

CAR-T therapy has shown remarkable success in treating patients with relapsed or refractory hematologic malignancies. However, the therapy is associated with unique safety concerns, particularly neurotoxicity. ICANS is a significant concern, and ongoing research aims to better understand the pathophysiology of adverse events associated with CAR-T.
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Reference News

[1]
Caroline Diorio, MD, FRCPC, FAAP, on Noninflammatory Neurotoxicity Events in Patients ...
cgtlive.com · Nov 3, 2024

CAR-T therapy, while effective for hematologic malignancies, has unique safety concerns like neurotoxicity (ICANS). A st...

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