Despite breakthroughs in cancer immunotherapy, most tumor-reactive T cells cannot persist in solid tumors due to an immunosuppressive environment. We developed Tres (tumor-resilient T cell), a computational model util...
Despite breakthroughs in cancer immunotherapy, most tumor-reactive T cells cannot persist in solid tumors due to an immunosuppressive environment. We developed Tres (tumor-resilient T cell), a computational model utilizing single-cell transcriptomic data to identify signatures of T cells that are resilient to immunosuppressive signals, such as transforming growth factor-β1, tumor necrosis factor-related apoptosis-inducing ligand and prostaglandin E2. Tres reliably predicts clinical responses to immunotherapy in melanoma, lung cancer, triple-negative breast cancer and B cell malignancies using bulk T cell transcriptomic data from pre-treatment tumors from patients who received immune-checkpoint inhibitors (n= 38), infusion products for chimeric antigen receptor T cell therapies (n= 34) and pre-manufacture samples for chimeric antigen receptor T cell or tumor-infiltrating lymphocyte therapies (n= 84). Further, Tres identifiedFIBP, whose functions are largely unknown, as the top negative marker of tumor-resilient T cells across many solid tumor *** in murine and human donor CD8+T cells significantly enhanced T cell-mediated cancer killing in in vitro co-cultures. Further,Fibpknockout in murine T cells potentiated the in vivo efficacy of adoptive cell transfer in the B16 tumor *** T cells exhibit reduced cholesterol metabolism, which inhibits effector T cell function. These results demonstrate the utility of Tres in identifying biomarkers of T cell effectiveness and potential therapeutic targets for immunotherapies in solid tumors.
An accurate assessment of p53's functional statuses is critical for cancer genomic ***,there is a significant challenge in identifying tumors with non-mutational p53 inactivation which is not detectable through DN...
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An accurate assessment of p53's functional statuses is critical for cancer genomic ***,there is a significant challenge in identifying tumors with non-mutational p53 inactivation which is not detectable through DNA *** undetected cases are often misclassified as p53-normal,leading to inaccurate prognosis and downstream association *** address this issue,we built the support vector machine(SVM)models to systematically reassess p53's functional statuses in TP53 wild-type(TP53^(WT))tumors from multiple The cancer Genome Atlas(TCGA)***-validation demonstrated the good performance of the SVM models with a mean area under the receiver operating characteristic curve(AUROC)of 0.9822,precision of 0.9747,and recall of *** study revealed that a significant proportion(87%-99%)of TP53^(WT) tumors actually had compromised p53 *** analyses uncovered that these genetically intact but functionally impaired(termed as predictively reduced function of p53 or TP53^(WT)-pRF)tumors exhibited genomic and pathophysiologic features akin to TP53-mutant tumors:heightened genomic instability and elevated levels of ***,patients with TP53^(WT)-pRF tumors experienced significantly shortened overall survival or progression-free survival compared to those with predictively normal function of p53(TP53^(WT)-pN)tumors,and these patients also displayed increased sensitivity to platinum-based chemotherapy and radiation therapy.
Research in modern healthcare requires vast volumes of data from various healthcare centers across the globe. It is not always feasible to centralize clinical data without compromising privacy. A tool addressing these...
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Hematologic toxicity, specifically prolonged cytopenia, is a common side effect associated with CAR-T therapies, being particularly severe in patients with relapsed/refractory Multiple Myeloma (MM) (1). However, to da...
Hematologic toxicity, specifically prolonged cytopenia, is a common side effect associated with CAR-T therapies, being particularly severe in patients with relapsed/refractory Multiple Myeloma (MM) (1). However, to date, its etiology is poorly understood. Thus, the main objective of this study was to identify and understand the underlying mechanisms of prolonged cytopenias associated with CAR-T therapy targeting BCMA. In our work, we combined the retrospective analysis of a cohort of 48 patients treated with BCMA CAR-T cells at Clinica Universidad de Navarra, with ex vivo transcriptomic analysis using single-cell RNA sequencing, to characterize the kinetics of cytopenia, identify predictive factors and determine potential mechanism underlying these toxicities. The overall incidence of cytopenia was 95.7%, and grade>3 thrombocytopenia and neutropenia one month after infusion, was observed in 57% and 53% of the patients, being still present after one year in 4 and 3 patients respectively. Presence of cytopenia at baseline and high peak inflammatory markers highly correlated with cytopenia persisting up to three months. To determine potential mechanisms underpinning cytopenias, we evaluated the paracrine effect of BCMA CAR-T cells on HSPCs differentiation, using an ex vivo myeloid differentiation model (2). Thus, supernatants from CAR-T cells or control T lymphocytes, co-cultured with MM tumor cell line U266, were added to the differentiation process. Phenotypic analysis by flow cytometry showed that supernatants from activated CAR-T cells (spCAR) halted HSPCs differentiation, promoting more immature phenotypes, with reduced expression of granulocytic, monocytic, and erythroid maturation markers, suggesting a paracrine effect related to CAR-T cells activation. Interestingly, this immature phenotype could be prevented by a combination of IFNγ, TNFα/β, TGFβ, IL-6, and IL-17 inhibitors, indicating the essential role of these cytokines and providing potential targets to pr
In the past decade,chimeric antigen receptor(CAR)-T cell therapy has emerged as a promising immunotherapeutic approach for combating cancers,demonstrating remarkable efficacy in relapsed/refractory hematological malig...
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In the past decade,chimeric antigen receptor(CAR)-T cell therapy has emerged as a promising immunotherapeutic approach for combating cancers,demonstrating remarkable efficacy in relapsed/refractory hematological malignancies in both pediatric and adult ***-natural killer(CAR-NK)cell complements CAR-T cell therapy by offering several distinct ***-NK cells do not require HLA compatibility and exhibit low safety ***,CAR-NK cells are conducive to“off-the-shelf”therapeutics,providing significant logistic advantages over CAR-T *** CAR-T and CAR-NK cells have shown consistent and promising results in hematological ***,their efficacy against solid tumors remains limited due to various obstacles including limited tumor trafficking and infiltration,as well as an immuno-suppressive tumor *** this review,we discuss the recent advances and current challenges of CAR-T and CAR-NK cell immunotherapies,with a specific focus on the obstacles to their application in solid *** also analyze in depth the advantages and drawbacks of CAR-NK cells compared to CAR-T cells and highlight CAR-NK CAR ***,we explore future perspectives of these adoptive immunotherapies,highlighting the increasing contribution of cutting-edge biotechnological tools in shaping the next generation of cellular immunotherapy.
3D pathology can potentially improve disease detection, but the datasets are too large to review. We're developing a deep-learning-based triage method to identify the highest-risk 2D sections within 3D pathology d...
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Deep learning (DL) and machine learning (ML) models have shown promise in drug response prediction (DRP), yet their ability to generalize across datasets remains an open question, raising concerns about their real-wor...
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Multiple co-stimulatory and co-inhibitory pathways modulate T-cell dependent anti-tumor immune responses in lymphoid malignancies. We recently defined the recurrent genetic alterations and associated substructure of d...
Multiple co-stimulatory and co-inhibitory pathways modulate T-cell dependent anti-tumor immune responses in lymphoid malignancies. We recently defined the recurrent genetic alterations and associated substructure of diffuse large B-cell lymphoma (DLBCL), including five distinct clusters (1-5), and identified potential genetic bases for immune evasion [ Nature Medicine 2018; 24:679-690]. In our series, 26% of tumors had inactivating somatic mutations or copy loss of CD70 and likely disruption of CD70/CD27 co-stimulation. CD70 and CD27 are homotrimer type II and homodimer type I transmembrane proteins and members of the TNF and TNF receptor superfamilies, respectively. CD70 is transiently expressed on certain normal B-cell and dendritic cell populations upon activation and constitutively expressed on multiple B-cell tumors. CD70 activation of CD27 + T cells promotes antigen-dependent T-cell expansion and immune surveillance of normal and malignant B cells. Patients with germline deficiencies of either CD70 or CD27 have an increased incidence of EBV-associated lymphoid malignancies, underscoring the importance of this co-stimulatory pathway. In our series, CD70 alterations were most common in Cluster 1 DLBCLs, which also exhibited recurrent BCL6 chromosomal translocations. The co-occurrence of CD70 and BCL6 genetic alterations was noteworthy because of the established role of CD8 + T-cell dependent immune surveillance in murine models of Bcl6 -driven DLBCL [ Nature Medicine 2014; 20:283-290]. To assess the consequences of Cd70 deficiency and perturbed CD70/CD27 co-stimulation on Bcl6 -driven lymphomagenesis, we crossed the previously described Bcl6 tg/+ and Cd70 -/- mice to generate Cd70 -/- ; Bcl6 tg/+ animals. In the aging cohorts, Cd70 -/- ; Bcl6 tg/+ mice were more likely than Bcl6 tg/+ animals (or the Cd70 -/- or wild-type [WT] groups) to be euthanized for symptoms before the study endpoint (18 months [mo]) (5 of 18 Cd70 -/- ; Bcl6 tg/+ euthanized for symptoms pri
The workshop “Engaging Older Adults in cancer Clinical Trials Conducted in the NCI Clinical Trials Network: Challenges and Opportunities” included a Patient Stakeholder Workgroup that explored the needs and concerns...
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