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Tisagenlecleucel in Children and Young Adults with B-Cell Lymphoblastic Leukemia

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TLDR
In this global study of CAR T‐cell therapy, a single infusion of tisagenlecleucel provided durable remission with long‐term persistence in pediatric and young adult patients with relapsed or refractory B‐cell ALL, with transient high‐grade toxic effects.
Abstract
Background In a single-center phase 1–2a study, the anti-CD19 chimeric antigen receptor (CAR) T-cell therapy tisagenlecleucel produced high rates of complete remission and was associated with serious but mainly reversible toxic effects in children and young adults with relapsed or refractory B-cell acute lymphoblastic leukemia (ALL) Methods We conducted a phase 2, single-cohort, 25-center, global study of tisagenlecleucel in pediatric and young adult patients with CD19+ relapsed or refractory B-cell ALL The primary end point was the overall remission rate (the rate of complete remission or complete remission with incomplete hematologic recovery) within 3 months Results For this planned analysis, 75 patients received an infusion of tisagenlecleucel and could be evaluated for efficacy The overall remission rate within 3 months was 81%, with all patients who had a response to treatment found to be negative for minimal residual disease, as assessed by means of flow cytometry The rates of event-f

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Current approaches in CRISPR-Cas9 mediated gene editing for biomedical and therapeutic applications.

TL;DR: In this paper , the authors highlight recent developments and utilization of the CRISPR-Cas9 system in correcting or generating gene mutations to create model organisms to develop deeper insights into diseases, rescue normal gene functionality, and curb the progression of a disease.
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Minor Histocompatibility Antigen-Specific T Cells.

TL;DR: Minor H antigens are discussed as T cell targets for augmenting the GVL effect in engineered HCT grafts and for post-HCT immunotherapy, and the importance of these developments for pediatric HCT is highlighted.
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Genetic ablation of PRDM1 in antitumor T cells enhances therapeutic efficacy of adoptive immunotherapy

- 07 Apr 2022 - 
TL;DR: In this article , the authors identified PR domain zinc finger protein 1 (PRDM1) as a key epigenetic gene associated with terminal T-cell differentiation, and proposed a genetic knockout of PRDM1 by clustered regularly interspaced short palindromic repeats (CRISPR)/CRisPR-associated protein 9 (Cas9) supported the maintenance of an early memory phenotype and polyfunctional cytokine secretion in repeatedly stimulated chimeric antigen receptor (CAR)-engineered T cells.
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Expanded human NK cells armed with CAR uncouple potent anti-tumor activity from off-tumor toxicity against solid tumors.

TL;DR: In this paper, the authors demonstrate that HER2 CAR-expression in NK cells from healthy donors and patients with breast cancer potently enhances their anti-tumor functions against various HER2-expressing cancer cells, regardless of MHC class I expression.
Journal ArticleDOI

The potential of CAR T therapy for relapsed or refractory pediatric and young adult B-cell ALL

TL;DR: The journey of tisagenlecleucel from early preclinical success to the US Food and Drug Administration approval is summarized in this review, and strategies that are currently being investigated to improve the efficacy and safety profile of CAR T-cells are explored.
References
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Journal ArticleDOI

Chimeric antigen receptor T cells persist and induce sustained remissions in relapsed refractory chronic lymphocytic leukemia

TL;DR: The in vivo expansion of theCAR T cells correlated with clinical responses, and the CAR T cells persisted and remained functional beyond 4 years in the first two patients achieving CR, suggesting that disease eradication may be possible in some patients with advanced CLL.
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