Issues
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Cover Image
Cover Image
Despite the efficacy of chimeric antigen receptor (CAR) T-cell therapies in patients with B-cell malignancies, relapse after initial response is common. This has been, in part, attributed to depletion of naive and stem cell memory T-cell populations as a result of prolonged ex vivo culturing. In this study, Dickinson and colleagues revealed both the preclinical development as well as the preliminary clinical data of YTB323, an autologous CD19-directed CAR T-cell therapy expressing the same CAR as tisagenlecleucel that can be manufactured in less than 2 days. In preclinical mouse models, enhanced in vivo expansion was observed with YTB323 along with antitumor activity at lower doses than traditionally manufactured CAR T cells. Moreover, in a first-in-human trial, patients with relapsed/refractory diffuse large B-cell lymphoma demonstrated retention of T-cell stemness after YTB323 treatment, promising overall safety, and improved clinical activity at 25-fold lower doses than tisagenlecleucel, suggesting that further evaluation of this therapy is warranted. For more information, see the article by Dickinson and colleagues on page 1982. Artwork by Bianca Dunn. - PDF Icon PDF LinkTable of Contents
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In This Issue
In the Spotlight
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Perspective
Research Articles
A Novel Autologous CAR-T Therapy, YTB323, with Preserved T-cell Stemness Shows Enhanced CAR T-cell Efficacy in Preclinical and Early Clinical Development
YTB323, a CD19-directed chimeric antigen receptor (CAR) T-cell therapy, retains T-cell stemness after a manufacturing process time of less than 2 days and demonstrates clinical antitumor activity at significantly lower doses than traditionally manufactured CAR T cells.
Resistance to Selective FGFR Inhibitors in FGFR-Driven Urothelial Cancer
In patients with FGFR-driven urothelial cancer, resistance to selective FGFR inhibitors is largely explained by the emergence of FGFR kinase domain mutations and alterations in the PI3K–mTOR pathway.
RLY-4008, the First Highly Selective FGFR2 Inhibitor with Activity across FGFR2 Alterations and Resistance Mutations
Unlike pan-FGFR inhibitors, RLY-4008 was designed to be selective for FGFR2 and induces clinical responses in FGFR2-altered solid tumors without clinically significant FGFR1-mediated hyperphosphatemia and FGFR4-mediated diarrhea.
A Novel Type of Monocytic Leukemia Stem Cell Revealed by the Clinical Use of Venetoclax-Based Therapy
Analyses of leukemia stem cells (LSC) in human acute myeloid leukemia (AML) revealed a type of monocytic LSC, distinct from primitive LSCs, that is responsible for the relapse/refractory response of some patients with AML treated with the BCL2 inhibitor venetoclax.
Dynamic Glycoprotein Hyposialylation Promotes Chemotherapy Evasion and Metastatic Seeding of Quiescent Circulating Tumor Cell Clusters in Breast Cancer
In breast cancer, chemotherapy evasion is coupled to loss of glycosylation (sialylation), cellular quiescence, cluster formation of circulating tumor cells, and metastasis, with anti-PODXL–targeting approaches blocking these effects.
FH Variant Pathogenicity Promotes Purine Salvage Pathway Dependence in Kidney Cancer
An investigation into the activity and metabolic consequences of patient fumarate hydratase (FH) variants showed that FH deficiency and fumarate accumulation render kidney cancer cells reliant on the purine salvage pathway for tumor growth.
Sex-Biased T-cell Exhaustion Drives Differential Immune Responses in Glioblastoma
Sex-biased T-cell exhaustion in glioblastoma is, in part, regulated by T cell–intrinsic factors, such as the X chromosome inactivation escape gene Kdm6a, which highlights the potential for a precision therapy approach based on patient biologic sex.
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